diff --git a/Makefile b/Makefile
index 53a03ec..95215ac 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 .DEFAULT_GOAL = build
 
 PWD := $(shell pwd)
-SRC := jemalloc-4.4.0
+SRC := jemalloc-4.5.0
 
 build:
 	@test -f $(SRC)/Makefile || make config --quiet
diff --git a/help.mk b/help.mk
index d3b1525..53a80ae 100644
--- a/help.mk
+++ b/help.mk
@@ -1,7 +1,7 @@
 .DEFAULT_GOAL = relink
 
 PWD := $(shell pwd)
-SRC := jemalloc-4.4.0
+SRC := jemalloc-4.5.0
 
 -include $(SRC)/Makefile
 
diff --git a/jemalloc-4.4.0/.travis.yml b/jemalloc-4.4.0/.travis.yml
deleted file mode 100644
index 1fed4f8..0000000
--- a/jemalloc-4.4.0/.travis.yml
+++ /dev/null
@@ -1,29 +0,0 @@
-language: c
-
-matrix:
-  include:
-    - os: linux
-      compiler: gcc
-    - os: linux
-      compiler: gcc
-      env:
-        - EXTRA_FLAGS=-m32
-      addons:
-        apt:
-          packages:
-          - gcc-multilib
-    - os: osx
-      compiler: clang
-    - os: osx
-      compiler: clang
-      env:
-        - EXTRA_FLAGS=-m32
-
-before_script:
-  - autoconf
-  - ./configure${EXTRA_FLAGS:+ CC="$CC $EXTRA_FLAGS"}
-  - make -j3
-  - make -j3 tests
-
-script:
-  - make check
diff --git a/jemalloc-4.4.0/VERSION b/jemalloc-4.4.0/VERSION
deleted file mode 100644
index 810bd6d..0000000
--- a/jemalloc-4.4.0/VERSION
+++ /dev/null
@@ -1 +0,0 @@
-4.4.0-0-gf1f76357313e7dcad7262f17a48ff0a2e005fcdc
diff --git a/jemalloc-4.4.0/test/test.sh.in b/jemalloc-4.4.0/test/test.sh.in
deleted file mode 100644
index a39f99f..0000000
--- a/jemalloc-4.4.0/test/test.sh.in
+++ /dev/null
@@ -1,53 +0,0 @@
-#!/bin/sh
-
-case @abi@ in
-  macho)
-    export DYLD_FALLBACK_LIBRARY_PATH="@objroot@lib"
-    ;;
-  pecoff)
-    export PATH="${PATH}:@objroot@lib"
-    ;;
-  *)
-    ;;
-esac
-
-# Corresponds to test_status_t.
-pass_code=0
-skip_code=1
-fail_code=2
-
-pass_count=0
-skip_count=0
-fail_count=0
-for t in $@; do
-  if [ $pass_count -ne 0 -o $skip_count -ne 0 -o $fail_count != 0 ] ; then
-    echo
-  fi
-  echo "=== ${t} ==="
-  ${t}@exe@ @abs_srcroot@ @abs_objroot@
-  result_code=$?
-  case ${result_code} in
-    ${pass_code})
-      pass_count=$((pass_count+1))
-      ;;
-    ${skip_code})
-      skip_count=$((skip_count+1))
-      ;;
-    ${fail_code})
-      fail_count=$((fail_count+1))
-      ;;
-    *)
-      echo "Test harness error" 1>&2
-      exit 1
-  esac
-done
-
-total_count=`expr ${pass_count} + ${skip_count} + ${fail_count}`
-echo
-echo "Test suite summary: pass: ${pass_count}/${total_count}, skip: ${skip_count}/${total_count}, fail: ${fail_count}/${total_count}"
-
-if [ ${fail_count} -eq 0 ] ; then
-  exit 0
-else
-  exit 1
-fi
diff --git a/jemalloc-4.4.0/test/unit/junk_alloc.c b/jemalloc-4.4.0/test/unit/junk_alloc.c
deleted file mode 100644
index a5895b5..0000000
--- a/jemalloc-4.4.0/test/unit/junk_alloc.c
+++ /dev/null
@@ -1,3 +0,0 @@
-#define	JEMALLOC_TEST_JUNK_OPT "junk:alloc"
-#include "junk.c"
-#undef JEMALLOC_TEST_JUNK_OPT
diff --git a/jemalloc-4.4.0/test/unit/junk_free.c b/jemalloc-4.4.0/test/unit/junk_free.c
deleted file mode 100644
index bb5183c..0000000
--- a/jemalloc-4.4.0/test/unit/junk_free.c
+++ /dev/null
@@ -1,3 +0,0 @@
-#define	JEMALLOC_TEST_JUNK_OPT "junk:free"
-#include "junk.c"
-#undef JEMALLOC_TEST_JUNK_OPT
diff --git a/jemalloc-4.4.0/test/unit/lg_chunk.c b/jemalloc-4.4.0/test/unit/lg_chunk.c
deleted file mode 100644
index 7e5df38..0000000
--- a/jemalloc-4.4.0/test/unit/lg_chunk.c
+++ /dev/null
@@ -1,26 +0,0 @@
-#include "test/jemalloc_test.h"
-
-/*
- * Make sure that opt.lg_chunk clamping is sufficient.  In practice, this test
- * program will fail a debug assertion during initialization and abort (rather
- * than the test soft-failing) if clamping is insufficient.
- */
-const char *malloc_conf = "lg_chunk:0";
-
-TEST_BEGIN(test_lg_chunk_clamp)
-{
-	void *p;
-
-	p = mallocx(1, 0);
-	assert_ptr_not_null(p, "Unexpected mallocx() failure");
-	dallocx(p, 0);
-}
-TEST_END
-
-int
-main(void)
-{
-
-	return (test(
-	    test_lg_chunk_clamp));
-}
diff --git a/jemalloc-4.4.0/.appveyor.yml b/jemalloc-4.5.0/.appveyor.yml
similarity index 65%
rename from jemalloc-4.4.0/.appveyor.yml
rename to jemalloc-4.5.0/.appveyor.yml
index ddd5c57..510815d 100644
--- a/jemalloc-4.4.0/.appveyor.yml
+++ b/jemalloc-4.5.0/.appveyor.yml
@@ -12,6 +12,20 @@ environment:
     CPU: x86_64
   - MSYSTEM: MINGW32
     CPU: i686
+  - MSYSTEM: MINGW64
+    CPU: x86_64
+    MSVC: amd64
+    CONFIG_FLAGS: --enable-debug
+  - MSYSTEM: MINGW32
+    CPU: i686
+    MSVC: x86
+    CONFIG_FLAGS: --enable-debug
+  - MSYSTEM: MINGW64
+    CPU: x86_64
+    CONFIG_FLAGS: --enable-debug
+  - MSYSTEM: MINGW32
+    CPU: i686
+    CONFIG_FLAGS: --enable-debug
 
 install:
   - set PATH=c:\msys64\%MSYSTEM%\bin;c:\msys64\usr\bin;%PATH%
@@ -21,7 +35,7 @@ install:
 
 build_script:
   - bash -c "autoconf"
-  - bash -c "./configure"
+  - bash -c "./configure $CONFIG_FLAGS"
   - mingw32-make -j3
   - file lib/jemalloc.dll
   - mingw32-make -j3 tests
diff --git a/jemalloc-4.4.0/.autom4te.cfg b/jemalloc-4.5.0/.autom4te.cfg
similarity index 100%
rename from jemalloc-4.4.0/.autom4te.cfg
rename to jemalloc-4.5.0/.autom4te.cfg
diff --git a/jemalloc-4.4.0/.gitattributes b/jemalloc-4.5.0/.gitattributes
similarity index 100%
rename from jemalloc-4.4.0/.gitattributes
rename to jemalloc-4.5.0/.gitattributes
diff --git a/jemalloc-4.4.0/.gitignore b/jemalloc-4.5.0/.gitignore
similarity index 100%
rename from jemalloc-4.4.0/.gitignore
rename to jemalloc-4.5.0/.gitignore
diff --git a/jemalloc-4.5.0/.travis.yml b/jemalloc-4.5.0/.travis.yml
new file mode 100644
index 0000000..b563928
--- /dev/null
+++ b/jemalloc-4.5.0/.travis.yml
@@ -0,0 +1,95 @@
+language: generic
+
+matrix:
+  include:
+    - os: linux
+      env: CC=gcc COMPILER_FLAGS="" CONFIGURE_FLAGS=""
+    - os: osx
+      env: CC=gcc COMPILER_FLAGS="" CONFIGURE_FLAGS=""
+    - os: linux
+      env: CC=clang COMPILER_FLAGS="" CONFIGURE_FLAGS=""
+    - os: linux
+      env: CC=gcc COMPILER_FLAGS="-m32" CONFIGURE_FLAGS=""
+      addons:
+        apt:
+          packages:
+            - gcc-multilib
+    - os: linux
+      env: CC=gcc COMPILER_FLAGS="" CONFIGURE_FLAGS="--enable-debug"
+    - os: linux
+      env: CC=gcc COMPILER_FLAGS="" CONFIGURE_FLAGS="--enable-prof"
+    - os: linux
+      env: CC=gcc COMPILER_FLAGS="" CONFIGURE_FLAGS="--disable-stats"
+    - os: linux
+      env: CC=gcc COMPILER_FLAGS="" CONFIGURE_FLAGS="--disable-tcache"
+    - os: osx
+      env: CC=clang COMPILER_FLAGS="" CONFIGURE_FLAGS=""
+    - os: osx
+      env: CC=gcc COMPILER_FLAGS="-m32" CONFIGURE_FLAGS=""
+    - os: osx
+      env: CC=gcc COMPILER_FLAGS="" CONFIGURE_FLAGS="--enable-debug"
+    - os: osx
+      env: CC=gcc COMPILER_FLAGS="" CONFIGURE_FLAGS="--disable-stats"
+    - os: osx
+      env: CC=gcc COMPILER_FLAGS="" CONFIGURE_FLAGS="--disable-tcache"
+    - os: linux
+      env: CC=clang COMPILER_FLAGS="-m32" CONFIGURE_FLAGS=""
+      addons:
+        apt:
+          packages:
+            - gcc-multilib
+    - os: linux
+      env: CC=clang COMPILER_FLAGS="" CONFIGURE_FLAGS="--enable-debug"
+    - os: linux
+      env: CC=clang COMPILER_FLAGS="" CONFIGURE_FLAGS="--enable-prof"
+    - os: linux
+      env: CC=clang COMPILER_FLAGS="" CONFIGURE_FLAGS="--disable-stats"
+    - os: linux
+      env: CC=clang COMPILER_FLAGS="" CONFIGURE_FLAGS="--disable-tcache"
+    - os: linux
+      env: CC=gcc COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--enable-debug"
+      addons:
+        apt:
+          packages:
+            - gcc-multilib
+    - os: linux
+      env: CC=gcc COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--enable-prof"
+      addons:
+        apt:
+          packages:
+            - gcc-multilib
+    - os: linux
+      env: CC=gcc COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--disable-stats"
+      addons:
+        apt:
+          packages:
+            - gcc-multilib
+    - os: linux
+      env: CC=gcc COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--disable-tcache"
+      addons:
+        apt:
+          packages:
+            - gcc-multilib
+    - os: linux
+      env: CC=gcc COMPILER_FLAGS="" CONFIGURE_FLAGS="--enable-debug --enable-prof"
+    - os: linux
+      env: CC=gcc COMPILER_FLAGS="" CONFIGURE_FLAGS="--enable-debug --disable-stats"
+    - os: linux
+      env: CC=gcc COMPILER_FLAGS="" CONFIGURE_FLAGS="--enable-debug --disable-tcache"
+    - os: linux
+      env: CC=gcc COMPILER_FLAGS="" CONFIGURE_FLAGS="--enable-prof --disable-stats"
+    - os: linux
+      env: CC=gcc COMPILER_FLAGS="" CONFIGURE_FLAGS="--enable-prof --disable-tcache"
+    - os: linux
+      env: CC=gcc COMPILER_FLAGS="" CONFIGURE_FLAGS="--disable-stats --disable-tcache"
+
+
+before_script:
+  - autoconf
+  - ./configure ${COMPILER_FLAGS:+       CC="$CC $COMPILER_FLAGS" }       $CONFIGURE_FLAGS
+  - make -j3
+  - make -j3 tests
+
+script:
+  - make check
+
diff --git a/jemalloc-4.4.0/COPYING b/jemalloc-4.5.0/COPYING
similarity index 100%
rename from jemalloc-4.4.0/COPYING
rename to jemalloc-4.5.0/COPYING
diff --git a/jemalloc-4.4.0/ChangeLog b/jemalloc-4.5.0/ChangeLog
similarity index 96%
rename from jemalloc-4.4.0/ChangeLog
rename to jemalloc-4.5.0/ChangeLog
index f75edd9..a940685 100644
--- a/jemalloc-4.4.0/ChangeLog
+++ b/jemalloc-4.5.0/ChangeLog
@@ -4,6 +4,41 @@ brevity.  Much more detail can be found in the git revision history:
 
     https://github.com/jemalloc/jemalloc
 
+* 4.5.0 (February 28, 2017)
+
+  This is the first release to benefit from much broader continuous integration
+  testing, thanks to @davidtgoldblatt.  Had we had this testing infrastructure
+  in place for prior releases, it would have caught all of the most serious
+  regressions fixed by this release.
+
+  New features:
+  - Add --disable-thp and the opt.thp to provide opt-out mechanisms for
+    transparent huge page integration.  (@jasone)
+  - Update zone allocator integration to work with macOS 10.12.  (@glandium)
+  - Restructure *CFLAGS configuration, so that CFLAGS behaves typically, and
+    EXTRA_CFLAGS provides a way to specify e.g. -Werror during building, but not
+    during configuration.  (@jasone, @ronawho)
+
+  Bug fixes:
+  - Fix DSS (sbrk(2)-based) allocation.  This regression was first released in
+    4.3.0.  (@jasone)
+  - Handle race in per size class utilization computation.  This functionality
+    was first released in 4.0.0.  (@interwq)
+  - Fix lock order reversal during gdump.  (@jasone)
+  - Fix-refactor tcache synchronization.  This regression was first released in
+    4.0.0.  (@jasone)
+  - Fix various JSON-formatted malloc_stats_print() bugs.  This functionality
+    was first released in 4.3.0.  (@jasone)
+  - Fix huge-aligned allocation.  This regression was first released in 4.4.0.
+    (@jasone)
+  - When transparent huge page integration is enabled, detect what state pages
+    start in according to the kernel's current operating mode, and only convert
+    arena chunks to non-huge during purging if that is not their initial state.
+    This functionality was first released in 4.4.0.  (@jasone)
+  - Fix lg_chunk clamping for the --enable-cache-oblivious --disable-fill case.
+    This regression was first released in 4.0.0.  (@jasone, @428desmo)
+  - Properly detect sparc64 when building for Linux.  (@glaubitz)
+
 * 4.4.0 (December 3, 2016)
 
   New features:
diff --git a/jemalloc-4.4.0/INSTALL b/jemalloc-4.5.0/INSTALL
similarity index 94%
rename from jemalloc-4.4.0/INSTALL
rename to jemalloc-4.5.0/INSTALL
index cce3ed7..19196ec 100644
--- a/jemalloc-4.4.0/INSTALL
+++ b/jemalloc-4.5.0/INSTALL
@@ -157,6 +157,13 @@ any of the following arguments (not a definitive list) to 'configure':
     released in bulk, thus reducing the total number of mutex operations.  See
     the "opt.tcache" option for usage details.
 
+--disable-thp
+    Disable transparent huge page (THP) integration.  On systems with THP
+    support, THPs are explicitly disabled as a side effect of unused dirty page
+    purging for chunks that back small and/or large allocations, because such
+    chunks typically comprise active, unused dirty, and untouched clean
+    pages.
+
 --disable-munmap
     Disable virtual memory deallocation via munmap(2); instead keep track of
     the virtual memory for later use.  munmap() is disabled by default (i.e.
@@ -306,17 +313,16 @@ The following environment variables (not a definitive list) impact configure's
 behavior:
 
 CFLAGS="?"
-    Pass these flags to the compiler.  You probably shouldn't define this unless
-    you know what you are doing.  (Use EXTRA_CFLAGS instead.)
+    Pass these flags to the C compiler.  Any flags set by the configure script
+    are prepended, which means explicitly set flags generally take precedence.
+    Take care when specifying flags such as -Werror, because configure tests may
+    be affected in undesirable ways.
 
 EXTRA_CFLAGS="?"
-    Append these flags to CFLAGS.  This makes it possible to add flags such as
-    -Werror, while allowing the configure script to determine what other flags
-    are appropriate for the specified configuration.
-
-    The configure script specifically checks whether an optimization flag (-O*)
-    is specified in EXTRA_CFLAGS, and refrains from specifying an optimization
-    level if it finds that one has already been specified.
+    Append these flags to CFLAGS, without passing them to the compiler during
+    configuration.  This makes it possible to add flags such as -Werror, while
+    allowing the configure script to determine what other flags are appropriate
+    for the specified configuration.
 
 CPPFLAGS="?"
     Pass these flags to the C preprocessor.  Note that CFLAGS is not passed to
diff --git a/jemalloc-4.4.0/Makefile.in b/jemalloc-4.5.0/Makefile.in
similarity index 98%
rename from jemalloc-4.4.0/Makefile.in
rename to jemalloc-4.5.0/Makefile.in
index c705363..e49a871 100644
--- a/jemalloc-4.4.0/Makefile.in
+++ b/jemalloc-4.5.0/Makefile.in
@@ -24,8 +24,10 @@ abs_objroot := @abs_objroot@
 
 # Build parameters.
 CPPFLAGS := @CPPFLAGS@ -I$(srcroot)include -I$(objroot)include
+CONFIGURE_CFLAGS := @CONFIGURE_CFLAGS@
+SPECIFIED_CFLAGS := @SPECIFIED_CFLAGS@
 EXTRA_CFLAGS := @EXTRA_CFLAGS@
-CFLAGS := @CFLAGS@ $(EXTRA_CFLAGS)
+CFLAGS := $(strip $(CONFIGURE_CFLAGS) $(SPECIFIED_CFLAGS) $(EXTRA_CFLAGS))
 LDFLAGS := @LDFLAGS@
 EXTRA_LDFLAGS := @EXTRA_LDFLAGS@
 LIBS := @LIBS@
@@ -156,6 +158,7 @@ TESTS_UNIT := \
 	$(srcroot)test/unit/bitmap.c \
 	$(srcroot)test/unit/ckh.c \
 	$(srcroot)test/unit/decay.c \
+	$(srcroot)test/unit/extent_quantize.c \
 	$(srcroot)test/unit/fork.c \
 	$(srcroot)test/unit/hash.c \
 	$(srcroot)test/unit/junk.c \
@@ -186,6 +189,7 @@ TESTS_UNIT := \
 	$(srcroot)test/unit/size_classes.c \
 	$(srcroot)test/unit/smoothstep.c \
 	$(srcroot)test/unit/stats.c \
+	$(srcroot)test/unit/stats_print.c \
 	$(srcroot)test/unit/ticker.c \
 	$(srcroot)test/unit/nstime.c \
 	$(srcroot)test/unit/tsd.c \
diff --git a/jemalloc-4.4.0/README b/jemalloc-4.5.0/README
similarity index 100%
rename from jemalloc-4.4.0/README
rename to jemalloc-4.5.0/README
diff --git a/jemalloc-4.5.0/VERSION b/jemalloc-4.5.0/VERSION
new file mode 100644
index 0000000..59deb3f
--- /dev/null
+++ b/jemalloc-4.5.0/VERSION
@@ -0,0 +1 @@
+4.5.0-0-g04380e79f1e2428bd0ad000bbc6e3d2dfc6b66a5
diff --git a/jemalloc-4.4.0/autogen.sh b/jemalloc-4.5.0/autogen.sh
similarity index 100%
rename from jemalloc-4.4.0/autogen.sh
rename to jemalloc-4.5.0/autogen.sh
diff --git a/jemalloc-4.4.0/bin/jemalloc-config.in b/jemalloc-4.5.0/bin/jemalloc-config.in
similarity index 100%
rename from jemalloc-4.4.0/bin/jemalloc-config.in
rename to jemalloc-4.5.0/bin/jemalloc-config.in
diff --git a/jemalloc-4.4.0/bin/jemalloc.sh.in b/jemalloc-4.5.0/bin/jemalloc.sh.in
similarity index 100%
rename from jemalloc-4.4.0/bin/jemalloc.sh.in
rename to jemalloc-4.5.0/bin/jemalloc.sh.in
diff --git a/jemalloc-4.4.0/bin/jeprof.in b/jemalloc-4.5.0/bin/jeprof.in
similarity index 100%
rename from jemalloc-4.4.0/bin/jeprof.in
rename to jemalloc-4.5.0/bin/jeprof.in
diff --git a/jemalloc-4.4.0/build-aux/config.guess b/jemalloc-4.5.0/build-aux/config.guess
similarity index 100%
rename from jemalloc-4.4.0/build-aux/config.guess
rename to jemalloc-4.5.0/build-aux/config.guess
diff --git a/jemalloc-4.4.0/build-aux/config.sub b/jemalloc-4.5.0/build-aux/config.sub
similarity index 100%
rename from jemalloc-4.4.0/build-aux/config.sub
rename to jemalloc-4.5.0/build-aux/config.sub
diff --git a/jemalloc-4.4.0/build-aux/install-sh b/jemalloc-4.5.0/build-aux/install-sh
similarity index 100%
rename from jemalloc-4.4.0/build-aux/install-sh
rename to jemalloc-4.5.0/build-aux/install-sh
diff --git a/jemalloc-4.4.0/config.stamp.in b/jemalloc-4.5.0/config.stamp.in
similarity index 100%
rename from jemalloc-4.4.0/config.stamp.in
rename to jemalloc-4.5.0/config.stamp.in
diff --git a/jemalloc-4.4.0/configure.ac b/jemalloc-4.5.0/configure.ac
similarity index 92%
rename from jemalloc-4.4.0/configure.ac
rename to jemalloc-4.5.0/configure.ac
index 9573c30..20a8a64 100644
--- a/jemalloc-4.4.0/configure.ac
+++ b/jemalloc-4.5.0/configure.ac
@@ -6,29 +6,66 @@ AC_CONFIG_AUX_DIR([build-aux])
 dnl ============================================================================
 dnl Custom macro definitions.
 
-dnl JE_CFLAGS_APPEND(cflag)
-AC_DEFUN([JE_CFLAGS_APPEND],
-[
-AC_MSG_CHECKING([whether compiler supports $1])
-TCFLAGS="${CFLAGS}"
-if test "x${CFLAGS}" = "x" ; then
-  CFLAGS="$1"
+dnl JE_CONCAT_VVV(r, a, b)
+dnl 
+dnl Set $r to the concatenation of $a and $b, with a space separating them iff
+dnl both $a and $b are non-emty.
+AC_DEFUN([JE_CONCAT_VVV],
+if test "x[$]{$2}" = "x" -o "x[$]{$3}" = "x" ; then
+  $1="[$]{$2}[$]{$3}"
 else
-  CFLAGS="${CFLAGS} $1"
+  $1="[$]{$2} [$]{$3}"
 fi
+)
+
+dnl JE_APPEND_VS(a, b)
+dnl 
+dnl Set $a to the concatenation of $a and b, with a space separating them iff
+dnl both $a and b are non-empty.
+AC_DEFUN([JE_APPEND_VS],
+  T_APPEND_V=$2
+  JE_CONCAT_VVV($1, $1, T_APPEND_V)
+)
+
+CONFIGURE_CFLAGS=
+SPECIFIED_CFLAGS="${CFLAGS}"
+dnl JE_CFLAGS_ADD(cflag)
+dnl 
+dnl CFLAGS is the concatenation of CONFIGURE_CFLAGS and SPECIFIED_CFLAGS
+dnl (ignoring EXTRA_CFLAGS, which does not impact configure tests.  This macro
+dnl appends to CONFIGURE_CFLAGS and regenerates CFLAGS.
+AC_DEFUN([JE_CFLAGS_ADD],
+[
+AC_MSG_CHECKING([whether compiler supports $1])
+T_CONFIGURE_CFLAGS="${CONFIGURE_CFLAGS}"
+JE_APPEND_VS(CONFIGURE_CFLAGS, $1)
+JE_CONCAT_VVV(CFLAGS, CONFIGURE_CFLAGS, SPECIFIED_CFLAGS)
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
 [[
 ]], [[
     return 0;
 ]])],
-              [je_cv_cflags_appended=$1]
+              [je_cv_cflags_added=$1]
               AC_MSG_RESULT([yes]),
-              [je_cv_cflags_appended=]
+              [je_cv_cflags_added=]
               AC_MSG_RESULT([no])
-              [CFLAGS="${TCFLAGS}"]
+              [CONFIGURE_CFLAGS="${T_CONFIGURE_CFLAGS}"]
 )
+JE_CONCAT_VVV(CFLAGS, CONFIGURE_CFLAGS, SPECIFIED_CFLAGS)
 ])
 
+dnl JE_CFLAGS_SAVE()
+dnl JE_CFLAGS_RESTORE()
+dnl 
+dnl Save/restore CFLAGS.  Nesting is not supported.
+AC_DEFUN([JE_CFLAGS_SAVE],
+SAVED_CONFIGURE_CFLAGS="${CONFIGURE_CFLAGS}"
+)
+AC_DEFUN([JE_CFLAGS_RESTORE],
+CONFIGURE_CFLAGS="${SAVED_CONFIGURE_CFLAGS}"
+JE_CONCAT_VVV(CFLAGS, CONFIGURE_CFLAGS, SPECIFIED_CFLAGS)
+)
+
 dnl JE_COMPILABLE(label, hcode, mcode, rvar)
 dnl 
 dnl Use AC_LINK_IFELSE() rather than AC_COMPILE_IFELSE() so that linker errors
@@ -168,46 +205,45 @@ if test "x${je_cv_cray}" = "xyes" ; then
                               [je_cv_cray_84=no])])
 fi
 
-if test "x$CFLAGS" = "x" ; then
-  no_CFLAGS="yes"
-  if test "x$GCC" = "xyes" ; then
-    JE_CFLAGS_APPEND([-std=gnu11])
-    if test "x$je_cv_cflags_appended" = "x-std=gnu11" ; then
+if test "x$GCC" = "xyes" ; then
+  JE_CFLAGS_ADD([-std=gnu11])
+  if test "x$je_cv_cflags_added" = "x-std=gnu11" ; then
+    AC_DEFINE_UNQUOTED([JEMALLOC_HAS_RESTRICT])
+  else
+    JE_CFLAGS_ADD([-std=gnu99])
+    if test "x$je_cv_cflags_added" = "x-std=gnu99" ; then
       AC_DEFINE_UNQUOTED([JEMALLOC_HAS_RESTRICT])
-    else
-      JE_CFLAGS_APPEND([-std=gnu99])
-      if test "x$je_cv_cflags_appended" = "x-std=gnu99" ; then
-        AC_DEFINE_UNQUOTED([JEMALLOC_HAS_RESTRICT])
-      fi
     fi
-    JE_CFLAGS_APPEND([-Wall])
-    JE_CFLAGS_APPEND([-Werror=declaration-after-statement])
-    JE_CFLAGS_APPEND([-Wshorten-64-to-32])
-    JE_CFLAGS_APPEND([-Wsign-compare])
-    JE_CFLAGS_APPEND([-pipe])
-    JE_CFLAGS_APPEND([-g3])
-  elif test "x$je_cv_msvc" = "xyes" ; then
-    CC="$CC -nologo"
-    JE_CFLAGS_APPEND([-Zi])
-    JE_CFLAGS_APPEND([-MT])
-    JE_CFLAGS_APPEND([-W3])
-    JE_CFLAGS_APPEND([-FS])
-    CPPFLAGS="$CPPFLAGS -I${srcdir}/include/msvc_compat"
   fi
-  if test "x$je_cv_cray" = "xyes" ; then
-    dnl cray compiler 8.4 has an inlining bug
-    if test "x$je_cv_cray_84" = "xyes" ; then
-      JE_CFLAGS_APPEND([-hipa2])
-      JE_CFLAGS_APPEND([-hnognu])
-    fi
-    if test "x$enable_cc_silence" != "xno" ; then
-      dnl ignore unreachable code warning
-      JE_CFLAGS_APPEND([-hnomessage=128])
-      dnl ignore redefinition of "malloc", "free", etc warning
-      JE_CFLAGS_APPEND([-hnomessage=1357])
-    fi
+  JE_CFLAGS_ADD([-Wall])
+  JE_CFLAGS_ADD([-Werror=declaration-after-statement])
+  JE_CFLAGS_ADD([-Wshorten-64-to-32])
+  JE_CFLAGS_ADD([-Wsign-compare])
+  JE_CFLAGS_ADD([-pipe])
+  JE_CFLAGS_ADD([-g3])
+elif test "x$je_cv_msvc" = "xyes" ; then
+  CC="$CC -nologo"
+  JE_CFLAGS_ADD([-Zi])
+  JE_CFLAGS_ADD([-MT])
+  JE_CFLAGS_ADD([-W3])
+  JE_CFLAGS_ADD([-FS])
+  JE_APPEND_VS(CPPFLAGS, -I${srcdir}/include/msvc_compat)
+fi
+if test "x$je_cv_cray" = "xyes" ; then
+  dnl cray compiler 8.4 has an inlining bug
+  if test "x$je_cv_cray_84" = "xyes" ; then
+    JE_CFLAGS_ADD([-hipa2])
+    JE_CFLAGS_ADD([-hnognu])
+  fi
+  if test "x$enable_cc_silence" != "xno" ; then
+    dnl ignore unreachable code warning
+    JE_CFLAGS_ADD([-hnomessage=128])
+    dnl ignore redefinition of "malloc", "free", etc warning
+    JE_CFLAGS_ADD([-hnomessage=1357])
   fi
 fi
+AC_SUBST([CONFIGURE_CFLAGS])
+AC_SUBST([SPECIFIED_CFLAGS])
 AC_SUBST([EXTRA_CFLAGS])
 AC_PROG_CPP
 
@@ -217,7 +253,7 @@ if test "x${ac_cv_big_endian}" = "x1" ; then
 fi
 
 if test "x${je_cv_msvc}" = "xyes" -a "x${ac_cv_header_inttypes_h}" = "xno"; then
-  CPPFLAGS="$CPPFLAGS -I${srcdir}/include/msvc_compat/C99"
+  JE_APPEND_VS(CPPFLAGS, -I${srcdir}/include/msvc_compat/C99)
 fi
 
 if test "x${je_cv_msvc}" = "xyes" ; then
@@ -348,7 +384,6 @@ dnl
 dnl Define cpp macros in CPPFLAGS, rather than doing AC_DEFINE(macro), since the
 dnl definitions need to be seen before any headers are included, which is a pain
 dnl to make happen otherwise.
-CFLAGS="$CFLAGS"
 default_munmap="1"
 maps_coalesce="1"
 case "${host}" in
@@ -380,7 +415,7 @@ case "${host}" in
 	;;
   *-*-linux-android)
 	dnl syscall(2) and secure_getenv(3) are exposed by _GNU_SOURCE.
-	CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE"
+	JE_APPEND_VS(CPPFLAGS, -D_GNU_SOURCE)
 	abi="elf"
 	AC_DEFINE([JEMALLOC_HAS_ALLOCA_H])
 	AC_DEFINE([JEMALLOC_PROC_SYS_VM_OVERCOMMIT_MEMORY], [ ])
@@ -391,7 +426,7 @@ case "${host}" in
 	;;
   *-*-linux* | *-*-kfreebsd*)
 	dnl syscall(2) and secure_getenv(3) are exposed by _GNU_SOURCE.
-	CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE"
+	JE_APPEND_VS(CPPFLAGS, -D_GNU_SOURCE)
 	abi="elf"
 	AC_DEFINE([JEMALLOC_HAS_ALLOCA_H])
 	AC_DEFINE([JEMALLOC_PROC_SYS_VM_OVERCOMMIT_MEMORY], [ ])
@@ -416,8 +451,8 @@ case "${host}" in
 	abi="elf"
 	RPATH='-Wl,-R,$(1)'
 	dnl Solaris needs this for sigwait().
-	CPPFLAGS="$CPPFLAGS -D_POSIX_PTHREAD_SEMANTICS"
-	LIBS="$LIBS -lposix4 -lsocket -lnsl"
+	JE_APPEND_VS(CPPFLAGS, -D_POSIX_PTHREAD_SEMANTICS)
+	JE_APPEND_VS(LIBS, -lposix4 -lsocket -lnsl)
 	;;
   *-ibm-aix*)
 	if "$LG_SIZEOF_PTR" = "8"; then
@@ -515,19 +550,19 @@ JE_COMPILABLE([__attribute__ syntax],
 if test "x${je_cv_attribute}" = "xyes" ; then
   AC_DEFINE([JEMALLOC_HAVE_ATTR], [ ])
   if test "x${GCC}" = "xyes" -a "x${abi}" = "xelf"; then
-    JE_CFLAGS_APPEND([-fvisibility=hidden])
+    JE_CFLAGS_ADD([-fvisibility=hidden])
   fi
 fi
 dnl Check for tls_model attribute support (clang 3.0 still lacks support).
-SAVED_CFLAGS="${CFLAGS}"
-JE_CFLAGS_APPEND([-Werror])
-JE_CFLAGS_APPEND([-herror_on_warning])
+JE_CFLAGS_SAVE()
+JE_CFLAGS_ADD([-Werror])
+JE_CFLAGS_ADD([-herror_on_warning])
 JE_COMPILABLE([tls_model attribute], [],
               [static __thread int
                __attribute__((tls_model("initial-exec"), unused)) foo;
                foo = 0;],
               [je_cv_tls_model])
-CFLAGS="${SAVED_CFLAGS}"
+JE_CFLAGS_RESTORE()
 if test "x${je_cv_tls_model}" = "xyes" ; then
   AC_DEFINE([JEMALLOC_TLS_MODEL],
             [__attribute__((tls_model("initial-exec")))])
@@ -535,35 +570,35 @@ else
   AC_DEFINE([JEMALLOC_TLS_MODEL], [ ])
 fi
 dnl Check for alloc_size attribute support.
-SAVED_CFLAGS="${CFLAGS}"
-JE_CFLAGS_APPEND([-Werror])
-JE_CFLAGS_APPEND([-herror_on_warning])
+JE_CFLAGS_SAVE()
+JE_CFLAGS_ADD([-Werror])
+JE_CFLAGS_ADD([-herror_on_warning])
 JE_COMPILABLE([alloc_size attribute], [#include <stdlib.h>],
               [void *foo(size_t size) __attribute__((alloc_size(1)));],
               [je_cv_alloc_size])
-CFLAGS="${SAVED_CFLAGS}"
+JE_CFLAGS_RESTORE()
 if test "x${je_cv_alloc_size}" = "xyes" ; then
   AC_DEFINE([JEMALLOC_HAVE_ATTR_ALLOC_SIZE], [ ])
 fi
 dnl Check for format(gnu_printf, ...) attribute support.
-SAVED_CFLAGS="${CFLAGS}"
-JE_CFLAGS_APPEND([-Werror])
-JE_CFLAGS_APPEND([-herror_on_warning])
+JE_CFLAGS_SAVE()
+JE_CFLAGS_ADD([-Werror])
+JE_CFLAGS_ADD([-herror_on_warning])
 JE_COMPILABLE([format(gnu_printf, ...) attribute], [#include <stdlib.h>],
               [void *foo(const char *format, ...) __attribute__((format(gnu_printf, 1, 2)));],
               [je_cv_format_gnu_printf])
-CFLAGS="${SAVED_CFLAGS}"
+JE_CFLAGS_RESTORE()
 if test "x${je_cv_format_gnu_printf}" = "xyes" ; then
   AC_DEFINE([JEMALLOC_HAVE_ATTR_FORMAT_GNU_PRINTF], [ ])
 fi
 dnl Check for format(printf, ...) attribute support.
-SAVED_CFLAGS="${CFLAGS}"
-JE_CFLAGS_APPEND([-Werror])
-JE_CFLAGS_APPEND([-herror_on_warning])
+JE_CFLAGS_SAVE()
+JE_CFLAGS_ADD([-Werror])
+JE_CFLAGS_ADD([-herror_on_warning])
 JE_COMPILABLE([format(printf, ...) attribute], [#include <stdlib.h>],
               [void *foo(const char *format, ...) __attribute__((format(printf, 1, 2)));],
               [je_cv_format_printf])
-CFLAGS="${SAVED_CFLAGS}"
+JE_CFLAGS_RESTORE()
 if test "x${je_cv_format_printf}" = "xyes" ; then
   AC_DEFINE([JEMALLOC_HAVE_ATTR_FORMAT_PRINTF], [ ])
 fi
@@ -625,9 +660,9 @@ if test "x$enable_code_coverage" = "x1" ; then
   deoptimize="no"
   echo "$CFLAGS $EXTRA_CFLAGS" | grep '\-O' >/dev/null || deoptimize="yes"
   if test "x${deoptimize}" = "xyes" ; then
-    JE_CFLAGS_APPEND([-O0])
+    JE_CFLAGS_ADD([-O0])
   fi
-  JE_CFLAGS_APPEND([-fprofile-arcs -ftest-coverage])
+  JE_CFLAGS_ADD([-fprofile-arcs -ftest-coverage])
   EXTRA_LDFLAGS="$EXTRA_LDFLAGS -fprofile-arcs -ftest-coverage"
   AC_DEFINE([JEMALLOC_CODE_COVERAGE], [ ])
 fi
@@ -817,19 +852,14 @@ if test "x$enable_ivsalloc" = "x1" ; then
 fi
 
 dnl Only optimize if not debugging.
-if test "x$enable_debug" = "x0" -a "x$no_CFLAGS" = "xyes" ; then
-  dnl Make sure that an optimization flag was not specified in EXTRA_CFLAGS.
-  optimize="no"
-  echo "$CFLAGS $EXTRA_CFLAGS" | grep '\-O' >/dev/null || optimize="yes"
-  if test "x${optimize}" = "xyes" ; then
-    if test "x$GCC" = "xyes" ; then
-      JE_CFLAGS_APPEND([-O3])
-      JE_CFLAGS_APPEND([-funroll-loops])
-    elif test "x$je_cv_msvc" = "xyes" ; then
-      JE_CFLAGS_APPEND([-O2])
-    else
-      JE_CFLAGS_APPEND([-O])
-    fi
+if test "x$enable_debug" = "x0" ; then
+  if test "x$GCC" = "xyes" ; then
+    JE_CFLAGS_ADD([-O3])
+    JE_CFLAGS_ADD([-funroll-loops])
+  elif test "x$je_cv_msvc" = "xyes" ; then
+    JE_CFLAGS_ADD([-O2])
+  else
+    JE_CFLAGS_ADD([-O])
   fi
 fi
 
@@ -893,10 +923,10 @@ fi,
 if test "x$backtrace_method" = "x" -a "x$enable_prof_libunwind" = "x1" ; then
   AC_CHECK_HEADERS([libunwind.h], , [enable_prof_libunwind="0"])
   if test "x$LUNWIND" = "x-lunwind" ; then
-    AC_CHECK_LIB([unwind], [unw_backtrace], [LIBS="$LIBS $LUNWIND"],
+    AC_CHECK_LIB([unwind], [unw_backtrace], [JE_APPEND_VS(LIBS, $LUNWIND)],
                  [enable_prof_libunwind="0"])
   else
-    LIBS="$LIBS $LUNWIND"
+    JE_APPEND_VS(LIBS, $LUNWIND)
   fi
   if test "x${enable_prof_libunwind}" = "x1" ; then
     backtrace_method="libunwind"
@@ -918,7 +948,7 @@ fi
 if test "x$backtrace_method" = "x" -a "x$enable_prof_libgcc" = "x1" \
      -a "x$GCC" = "xyes" ; then
   AC_CHECK_HEADERS([unwind.h], , [enable_prof_libgcc="0"])
-  AC_CHECK_LIB([gcc], [_Unwind_Backtrace], [LIBS="$LIBS -lgcc"], [enable_prof_libgcc="0"])
+  AC_CHECK_LIB([gcc], [_Unwind_Backtrace], [JE_APPEND_VS(LIBS, -lgcc)], [enable_prof_libgcc="0"])
   if test "x${enable_prof_libgcc}" = "x1" ; then
     backtrace_method="libgcc"
     AC_DEFINE([JEMALLOC_PROF_LIBGCC], [ ])
@@ -940,7 +970,7 @@ fi
 )
 if test "x$backtrace_method" = "x" -a "x$enable_prof_gcc" = "x1" \
      -a "x$GCC" = "xyes" ; then
-  JE_CFLAGS_APPEND([-fno-omit-frame-pointer])
+  JE_CFLAGS_ADD([-fno-omit-frame-pointer])
   backtrace_method="gcc intrinsics"
   AC_DEFINE([JEMALLOC_PROF_GCC], [ ])
 else
@@ -955,9 +985,7 @@ AC_MSG_CHECKING([configured backtracing method])
 AC_MSG_RESULT([$backtrace_method])
 if test "x$enable_prof" = "x1" ; then
   dnl Heap profiling uses the log(3) function.
-  if test "x$LM" != "x" ; then
-    LIBS="$LIBS $LM"
-  fi
+  JE_APPEND_VS(LIBS, $LM)
 
   AC_DEFINE([JEMALLOC_PROF], [ ])
 fi
@@ -1326,7 +1354,7 @@ if test "x$abi" != "xpecoff" ; then
   AC_CHECK_HEADERS([pthread.h], , [AC_MSG_ERROR([pthread.h is missing])])
   dnl Some systems may embed pthreads functionality in libc; check for libpthread
   dnl first, but try libc too before failing.
-  AC_CHECK_LIB([pthread], [pthread_create], [LIBS="$LIBS -lpthread"],
+  AC_CHECK_LIB([pthread], [pthread_create], [JE_APPEND_VS(LIBS, -lpthread)],
                [AC_SEARCH_LIBS([pthread_create], , ,
                                AC_MSG_ERROR([libpthread is missing]))])
   JE_COMPILABLE([pthread_atfork(3)], [
@@ -1339,7 +1367,7 @@ if test "x$abi" != "xpecoff" ; then
   fi
 fi
 
-CPPFLAGS="$CPPFLAGS -D_REENTRANT"
+JE_APPEND_VS(CPPFLAGS, -D_REENTRANT)
 
 dnl Check whether clock_gettime(2) is in libc or librt.
 AC_SEARCH_LIBS([clock_gettime], [rt])
@@ -1348,13 +1376,13 @@ dnl Cray wrapper compiler often adds `-lrt` when using `-static`. Check with
 dnl `-dynamic` as well in case a user tries to dynamically link in jemalloc
 if test "x$je_cv_cray_prgenv_wrapper" = "xyes" ; then
   if test "$ac_cv_search_clock_gettime" != "-lrt"; then
-    SAVED_CFLAGS="${CFLAGS}"
+    JE_CFLAGS_SAVE()
 
     unset ac_cv_search_clock_gettime
-    JE_CFLAGS_APPEND([-dynamic])
+    JE_CFLAGS_ADD([-dynamic])
     AC_SEARCH_LIBS([clock_gettime], [rt])
 
-    CFLAGS="${SAVED_CFLAGS}"
+    JE_CFLAGS_RESTORE()
   fi
 fi
 
@@ -1410,8 +1438,8 @@ fi
 if test "x$enable_syscall" = "x1" ; then
   dnl Check if syscall(2) is usable.  Treat warnings as errors, so that e.g. OS
   dnl X 10.12's deprecation warning prevents use.
-  SAVED_CFLAGS="${CFLAGS}"
-  JE_CFLAGS_APPEND([-Werror])
+  JE_CFLAGS_SAVE()
+  JE_CFLAGS_ADD([-Werror])
   JE_COMPILABLE([syscall(2)], [
 #include <sys/syscall.h>
 #include <unistd.h>
@@ -1419,7 +1447,7 @@ if test "x$enable_syscall" = "x1" ; then
 	syscall(SYS_write, 2, "hello", 5);
 ],
                 [je_cv_syscall])
-  CFLAGS="${SAVED_CFLAGS}"
+  JE_CFLAGS_RESTORE()
   if test "x$je_cv_syscall" = "xyes" ; then
     AC_DEFINE([JEMALLOC_USE_SYSCALL], [ ])
   fi
@@ -1495,7 +1523,7 @@ if test "x$enable_lazy_lock" = "x1" ; then
   if test "x$abi" != "xpecoff" ; then
     AC_CHECK_HEADERS([dlfcn.h], , [AC_MSG_ERROR([dlfcn.h is missing])])
     AC_CHECK_FUNC([dlsym], [],
-      [AC_CHECK_LIB([dl], [dlsym], [LIBS="$LIBS -ldl"],
+      [AC_CHECK_LIB([dl], [dlsym], [JE_APPEND_VS(LIBS, -ldl)],
                     [AC_MSG_ERROR([libdl is missing])])
       ])
   fi
@@ -1655,10 +1683,31 @@ if test "x${je_cv_madvise}" = "xyes" ; then
 	madvise((void *)0, 0, MADV_NOHUGEPAGE);
 ], [je_cv_thp])
   if test "x${je_cv_thp}" = "xyes" ; then
-    AC_DEFINE([JEMALLOC_THP], [ ])
+    AC_DEFINE([JEMALLOC_HAVE_MADVISE_HUGE], [ ])
   fi
 fi
 
+dnl Enable transparent huge page support by default.
+AC_ARG_ENABLE([thp],
+  [AS_HELP_STRING([--disable-thp],
+                  [Disable transparent huge page supprot])],
+[if test "x$enable_thp" = "xno" -o "x${je_cv_thp}" != "xyes" ; then
+  enable_thp="0"
+else
+  enable_thp="1"
+fi
+],
+[if test "x${je_cv_thp}" = "xyes" ; then
+  enable_thp="1"
+else
+  enable_thp="0"
+fi
+])
+if test "x$enable_thp" = "x1" ; then
+  AC_DEFINE([JEMALLOC_THP], [ ])
+fi
+AC_SUBST([enable_thp])
+
 dnl ============================================================================
 dnl Check whether __sync_{add,sub}_and_fetch() are available despite
 dnl __GCC_HAVE_SYNC_COMPARE_AND_SWAP_n macros being undefined.
@@ -1774,37 +1823,6 @@ if test "x${enable_zone_allocator}" = "x1" ; then
     AC_MSG_ERROR([--enable-zone-allocator is only supported on Darwin])
   fi
   AC_DEFINE([JEMALLOC_ZONE], [ ])
-
-  dnl The szone version jumped from 3 to 6 between the OS X 10.5.x and 10.6
-  dnl releases.  malloc_zone_t and malloc_introspection_t have new fields in
-  dnl 10.6, which is the only source-level indication of the change.
-  AC_MSG_CHECKING([malloc zone version])
-  AC_DEFUN([JE_ZONE_PROGRAM],
-    [AC_LANG_PROGRAM(
-      [#include <malloc/malloc.h>],
-      [static int foo[[sizeof($1) $2 sizeof(void *) * $3 ? 1 : -1]]]
-    )])
-
-  AC_COMPILE_IFELSE([JE_ZONE_PROGRAM(malloc_zone_t,==,14)],[JEMALLOC_ZONE_VERSION=3],[
-  AC_COMPILE_IFELSE([JE_ZONE_PROGRAM(malloc_zone_t,==,15)],[JEMALLOC_ZONE_VERSION=5],[
-  AC_COMPILE_IFELSE([JE_ZONE_PROGRAM(malloc_zone_t,==,16)],[
-    AC_COMPILE_IFELSE([JE_ZONE_PROGRAM(malloc_introspection_t,==,9)],[JEMALLOC_ZONE_VERSION=6],[
-    AC_COMPILE_IFELSE([JE_ZONE_PROGRAM(malloc_introspection_t,==,13)],[JEMALLOC_ZONE_VERSION=7],[JEMALLOC_ZONE_VERSION=]
-  )])],[
-  AC_COMPILE_IFELSE([JE_ZONE_PROGRAM(malloc_zone_t,==,17)],[JEMALLOC_ZONE_VERSION=8],[
-  AC_COMPILE_IFELSE([JE_ZONE_PROGRAM(malloc_zone_t,>,17)],[JEMALLOC_ZONE_VERSION=9],[JEMALLOC_ZONE_VERSION=]
-  )])])])])
-  if test "x${JEMALLOC_ZONE_VERSION}" = "x"; then
-    AC_MSG_RESULT([unsupported])
-    AC_MSG_ERROR([Unsupported malloc zone version])
-  fi
-  if test "${JEMALLOC_ZONE_VERSION}" = 9; then
-    JEMALLOC_ZONE_VERSION=8
-    AC_MSG_RESULT([> 8])
-  else
-    AC_MSG_RESULT([$JEMALLOC_ZONE_VERSION])
-  fi
-  AC_DEFINE_UNQUOTED(JEMALLOC_ZONE_VERSION, [$JEMALLOC_ZONE_VERSION])
 fi
 
 dnl ============================================================================
@@ -1978,7 +1996,8 @@ AC_MSG_RESULT([library revision   : ${rev}])
 AC_MSG_RESULT([])
 AC_MSG_RESULT([CONFIG             : ${CONFIG}])
 AC_MSG_RESULT([CC                 : ${CC}])
-AC_MSG_RESULT([CFLAGS             : ${CFLAGS}])
+AC_MSG_RESULT([CONFIGURE_CFLAGS   : ${CONFIGURE_CFLAGS}])
+AC_MSG_RESULT([SPECIFIED_CFLAGS   : ${SPECIFIED_CFLAGS}])
 AC_MSG_RESULT([EXTRA_CFLAGS       : ${EXTRA_CFLAGS}])
 AC_MSG_RESULT([CPPFLAGS           : ${CPPFLAGS}])
 AC_MSG_RESULT([LDFLAGS            : ${LDFLAGS}])
@@ -2016,6 +2035,7 @@ AC_MSG_RESULT([prof-libunwind     : ${enable_prof_libunwind}])
 AC_MSG_RESULT([prof-libgcc        : ${enable_prof_libgcc}])
 AC_MSG_RESULT([prof-gcc           : ${enable_prof_gcc}])
 AC_MSG_RESULT([tcache             : ${enable_tcache}])
+AC_MSG_RESULT([thp                : ${enable_thp}])
 AC_MSG_RESULT([fill               : ${enable_fill}])
 AC_MSG_RESULT([utrace             : ${enable_utrace}])
 AC_MSG_RESULT([valgrind           : ${enable_valgrind}])
diff --git a/jemalloc-4.4.0/coverage.sh b/jemalloc-4.5.0/coverage.sh
similarity index 100%
rename from jemalloc-4.4.0/coverage.sh
rename to jemalloc-4.5.0/coverage.sh
diff --git a/jemalloc-4.4.0/doc/html.xsl.in b/jemalloc-4.5.0/doc/html.xsl.in
similarity index 100%
rename from jemalloc-4.4.0/doc/html.xsl.in
rename to jemalloc-4.5.0/doc/html.xsl.in
diff --git a/jemalloc-4.4.0/doc/jemalloc.xml.in b/jemalloc-4.5.0/doc/jemalloc.xml.in
similarity index 99%
rename from jemalloc-4.4.0/doc/jemalloc.xml.in
rename to jemalloc-4.5.0/doc/jemalloc.xml.in
index d9c8345..c97ab0f 100644
--- a/jemalloc-4.4.0/doc/jemalloc.xml.in
+++ b/jemalloc-4.5.0/doc/jemalloc.xml.in
@@ -850,6 +850,17 @@ for (i = 0; i < nbins; i++) {
         during build configuration.</para></listitem>
       </varlistentry>
 
+      <varlistentry id="config.thp">
+        <term>
+          <mallctl>config.thp</mallctl>
+          (<type>bool</type>)
+          <literal>r-</literal>
+        </term>
+        <listitem><para><option>--disable-thp</option> was not specified
+        during build configuration, and the system supports transparent huge
+        page manipulation.</para></listitem>
+      </varlistentry>
+
       <varlistentry id="config.tls">
         <term>
           <mallctl>config.tls</mallctl>
@@ -1162,6 +1173,21 @@ malloc_conf = "xmalloc:true";]]></programlisting>
         forcefully disabled.</para></listitem>
       </varlistentry>
 
+      <varlistentry id="opt.thp">
+        <term>
+          <mallctl>opt.thp</mallctl>
+          (<type>bool</type>)
+          <literal>r-</literal>
+          [<option>--enable-thp</option>]
+        </term>
+        <listitem><para>Transparent huge page (THP) integration
+        enabled/disabled.  When enabled, THPs are explicitly disabled as a side
+        effect of unused dirty page purging for chunks that back small and/or
+        large allocations, because such chunks typically comprise active,
+        unused dirty, and untouched clean pages.  This option is enabled by
+        default.</para></listitem>
+      </varlistentry>
+
       <varlistentry id="opt.lg_tcache_max">
         <term>
           <mallctl>opt.lg_tcache_max</mallctl>
diff --git a/jemalloc-4.4.0/doc/manpages.xsl.in b/jemalloc-4.5.0/doc/manpages.xsl.in
similarity index 100%
rename from jemalloc-4.4.0/doc/manpages.xsl.in
rename to jemalloc-4.5.0/doc/manpages.xsl.in
diff --git a/jemalloc-4.4.0/doc/stylesheet.xsl b/jemalloc-4.5.0/doc/stylesheet.xsl
similarity index 100%
rename from jemalloc-4.4.0/doc/stylesheet.xsl
rename to jemalloc-4.5.0/doc/stylesheet.xsl
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/arena.h b/jemalloc-4.5.0/include/jemalloc/internal/arena.h
similarity index 99%
rename from jemalloc-4.4.0/include/jemalloc/internal/arena.h
rename to jemalloc-4.5.0/include/jemalloc/internal/arena.h
index ce4e602..119e3a5 100644
--- a/jemalloc-4.4.0/include/jemalloc/internal/arena.h
+++ b/jemalloc-4.5.0/include/jemalloc/internal/arena.h
@@ -506,6 +506,7 @@ static const size_t	large_pad =
 #endif
     ;
 
+extern bool		opt_thp;
 extern purge_mode_t	opt_purge;
 extern const char	*purge_mode_names[];
 extern ssize_t		opt_lg_dirty_mult;
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/assert.h b/jemalloc-4.5.0/include/jemalloc/internal/assert.h
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/assert.h
rename to jemalloc-4.5.0/include/jemalloc/internal/assert.h
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/atomic.h b/jemalloc-4.5.0/include/jemalloc/internal/atomic.h
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/atomic.h
rename to jemalloc-4.5.0/include/jemalloc/internal/atomic.h
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/base.h b/jemalloc-4.5.0/include/jemalloc/internal/base.h
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/base.h
rename to jemalloc-4.5.0/include/jemalloc/internal/base.h
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/bitmap.h b/jemalloc-4.5.0/include/jemalloc/internal/bitmap.h
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/bitmap.h
rename to jemalloc-4.5.0/include/jemalloc/internal/bitmap.h
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/chunk.h b/jemalloc-4.5.0/include/jemalloc/internal/chunk.h
similarity index 97%
rename from jemalloc-4.4.0/include/jemalloc/internal/chunk.h
rename to jemalloc-4.5.0/include/jemalloc/internal/chunk.h
index 50b9904..55df9ac 100644
--- a/jemalloc-4.4.0/include/jemalloc/internal/chunk.h
+++ b/jemalloc-4.5.0/include/jemalloc/internal/chunk.h
@@ -52,8 +52,8 @@ chunk_hooks_t	chunk_hooks_get(tsdn_t *tsdn, arena_t *arena);
 chunk_hooks_t	chunk_hooks_set(tsdn_t *tsdn, arena_t *arena,
     const chunk_hooks_t *chunk_hooks);
 
-bool	chunk_register(tsdn_t *tsdn, const void *chunk,
-    const extent_node_t *node);
+bool	chunk_register(const void *chunk, const extent_node_t *node,
+    bool *gdump);
 void	chunk_deregister(const void *chunk, const extent_node_t *node);
 void	*chunk_alloc_base(size_t size);
 void	*chunk_alloc_cache(tsdn_t *tsdn, arena_t *arena,
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/chunk_dss.h b/jemalloc-4.5.0/include/jemalloc/internal/chunk_dss.h
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/chunk_dss.h
rename to jemalloc-4.5.0/include/jemalloc/internal/chunk_dss.h
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/chunk_mmap.h b/jemalloc-4.5.0/include/jemalloc/internal/chunk_mmap.h
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/chunk_mmap.h
rename to jemalloc-4.5.0/include/jemalloc/internal/chunk_mmap.h
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/ckh.h b/jemalloc-4.5.0/include/jemalloc/internal/ckh.h
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/ckh.h
rename to jemalloc-4.5.0/include/jemalloc/internal/ckh.h
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/ctl.h b/jemalloc-4.5.0/include/jemalloc/internal/ctl.h
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/ctl.h
rename to jemalloc-4.5.0/include/jemalloc/internal/ctl.h
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/extent.h b/jemalloc-4.5.0/include/jemalloc/internal/extent.h
similarity index 98%
rename from jemalloc-4.4.0/include/jemalloc/internal/extent.h
rename to jemalloc-4.5.0/include/jemalloc/internal/extent.h
index 168ffe6..fc77f9f 100644
--- a/jemalloc-4.4.0/include/jemalloc/internal/extent.h
+++ b/jemalloc-4.5.0/include/jemalloc/internal/extent.h
@@ -75,6 +75,11 @@ typedef rb_tree(extent_node_t) extent_tree_t;
 /******************************************************************************/
 #ifdef JEMALLOC_H_EXTERNS
 
+#ifdef JEMALLOC_JET
+size_t	extent_size_quantize_floor(size_t size);
+#endif
+size_t	extent_size_quantize_ceil(size_t size);
+
 rb_proto(, extent_tree_szsnad_, extent_tree_t, extent_node_t)
 
 rb_proto(, extent_tree_ad_, extent_tree_t, extent_node_t)
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/hash.h b/jemalloc-4.5.0/include/jemalloc/internal/hash.h
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/hash.h
rename to jemalloc-4.5.0/include/jemalloc/internal/hash.h
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/huge.h b/jemalloc-4.5.0/include/jemalloc/internal/huge.h
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/huge.h
rename to jemalloc-4.5.0/include/jemalloc/internal/huge.h
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/jemalloc_internal.h.in b/jemalloc-4.5.0/include/jemalloc/internal/jemalloc_internal.h.in
similarity index 99%
rename from jemalloc-4.4.0/include/jemalloc/internal/jemalloc_internal.h.in
rename to jemalloc-4.5.0/include/jemalloc/internal/jemalloc_internal.h.in
index e7ace7d..e3b499a 100644
--- a/jemalloc-4.4.0/include/jemalloc/internal/jemalloc_internal.h.in
+++ b/jemalloc-4.5.0/include/jemalloc/internal/jemalloc_internal.h.in
@@ -99,6 +99,13 @@ static const bool config_tcache =
     false
 #endif
     ;
+static const bool config_thp =
+#ifdef JEMALLOC_THP
+    true
+#else
+    false
+#endif
+    ;
 static const bool config_tls =
 #ifdef JEMALLOC_TLS
     true
@@ -158,7 +165,6 @@ static const bool config_cache_oblivious =
 #include <mach/mach_error.h>
 #include <mach/mach_init.h>
 #include <mach/vm_map.h>
-#include <malloc/malloc.h>
 #endif
 
 #include "jemalloc/internal/ph.h"
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/jemalloc_internal_decls.h b/jemalloc-4.5.0/include/jemalloc/internal/jemalloc_internal_decls.h
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/jemalloc_internal_decls.h
rename to jemalloc-4.5.0/include/jemalloc/internal/jemalloc_internal_decls.h
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/jemalloc_internal_defs.h.in b/jemalloc-4.5.0/include/jemalloc/internal/jemalloc_internal_defs.h.in
similarity index 98%
rename from jemalloc-4.4.0/include/jemalloc/internal/jemalloc_internal_defs.h.in
rename to jemalloc-4.5.0/include/jemalloc/internal/jemalloc_internal_defs.h.in
index def4ba5..7c88b0d 100644
--- a/jemalloc-4.4.0/include/jemalloc/internal/jemalloc_internal_defs.h.in
+++ b/jemalloc-4.5.0/include/jemalloc/internal/jemalloc_internal_defs.h.in
@@ -239,7 +239,6 @@
  * Darwin (OS X) uses zones to work around Mach-O symbol override shortcomings.
  */
 #undef JEMALLOC_ZONE
-#undef JEMALLOC_ZONE_VERSION
 
 /*
  * Methods for determining whether the OS overcommits.
@@ -253,6 +252,12 @@
 /* Defined if madvise(2) is available. */
 #undef JEMALLOC_HAVE_MADVISE
 
+/*
+ * Defined if transparent huge pages are supported via the MADV_[NO]HUGEPAGE
+ * arguments to madvise(2).
+ */
+#undef JEMALLOC_HAVE_MADVISE_HUGE
+
 /*
  * Methods for purging unused pages differ between operating systems.
  *
@@ -265,10 +270,7 @@
 #undef JEMALLOC_PURGE_MADVISE_FREE
 #undef JEMALLOC_PURGE_MADVISE_DONTNEED
 
-/*
- * Defined if transparent huge pages are supported via the MADV_[NO]HUGEPAGE
- * arguments to madvise(2).
- */
+/* Defined if transparent huge page support is enabled. */
 #undef JEMALLOC_THP
 
 /* Define if operating system has alloca.h header. */
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/jemalloc_internal_macros.h b/jemalloc-4.5.0/include/jemalloc/internal/jemalloc_internal_macros.h
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/jemalloc_internal_macros.h
rename to jemalloc-4.5.0/include/jemalloc/internal/jemalloc_internal_macros.h
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/mb.h b/jemalloc-4.5.0/include/jemalloc/internal/mb.h
similarity index 98%
rename from jemalloc-4.4.0/include/jemalloc/internal/mb.h
rename to jemalloc-4.5.0/include/jemalloc/internal/mb.h
index 5384728..e58da5c 100644
--- a/jemalloc-4.4.0/include/jemalloc/internal/mb.h
+++ b/jemalloc-4.5.0/include/jemalloc/internal/mb.h
@@ -76,7 +76,7 @@ mb_write(void)
 	    : "memory" /* Clobbers. */
 	    );
 }
-#elif defined(__sparc64__)
+#elif defined(__sparc__) && defined(__arch64__)
 JEMALLOC_INLINE void
 mb_write(void)
 {
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/mutex.h b/jemalloc-4.5.0/include/jemalloc/internal/mutex.h
similarity index 93%
rename from jemalloc-4.4.0/include/jemalloc/internal/mutex.h
rename to jemalloc-4.5.0/include/jemalloc/internal/mutex.h
index b442d2d..2b4b1c3 100644
--- a/jemalloc-4.4.0/include/jemalloc/internal/mutex.h
+++ b/jemalloc-4.5.0/include/jemalloc/internal/mutex.h
@@ -85,8 +85,8 @@ JEMALLOC_INLINE void
 malloc_mutex_lock(tsdn_t *tsdn, malloc_mutex_t *mutex)
 {
 
+	witness_assert_not_owner(tsdn, &mutex->witness);
 	if (isthreaded) {
-		witness_assert_not_owner(tsdn, &mutex->witness);
 #ifdef _WIN32
 #  if _WIN32_WINNT >= 0x0600
 		AcquireSRWLockExclusive(&mutex->lock);
@@ -100,16 +100,16 @@ malloc_mutex_lock(tsdn_t *tsdn, malloc_mutex_t *mutex)
 #else
 		pthread_mutex_lock(&mutex->lock);
 #endif
-		witness_lock(tsdn, &mutex->witness);
 	}
+	witness_lock(tsdn, &mutex->witness);
 }
 
 JEMALLOC_INLINE void
 malloc_mutex_unlock(tsdn_t *tsdn, malloc_mutex_t *mutex)
 {
 
+	witness_unlock(tsdn, &mutex->witness);
 	if (isthreaded) {
-		witness_unlock(tsdn, &mutex->witness);
 #ifdef _WIN32
 #  if _WIN32_WINNT >= 0x0600
 		ReleaseSRWLockExclusive(&mutex->lock);
@@ -130,16 +130,14 @@ JEMALLOC_INLINE void
 malloc_mutex_assert_owner(tsdn_t *tsdn, malloc_mutex_t *mutex)
 {
 
-	if (isthreaded)
-		witness_assert_owner(tsdn, &mutex->witness);
+	witness_assert_owner(tsdn, &mutex->witness);
 }
 
 JEMALLOC_INLINE void
 malloc_mutex_assert_not_owner(tsdn_t *tsdn, malloc_mutex_t *mutex)
 {
 
-	if (isthreaded)
-		witness_assert_not_owner(tsdn, &mutex->witness);
+	witness_assert_not_owner(tsdn, &mutex->witness);
 }
 #endif
 
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/nstime.h b/jemalloc-4.5.0/include/jemalloc/internal/nstime.h
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/nstime.h
rename to jemalloc-4.5.0/include/jemalloc/internal/nstime.h
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/pages.h b/jemalloc-4.5.0/include/jemalloc/internal/pages.h
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/pages.h
rename to jemalloc-4.5.0/include/jemalloc/internal/pages.h
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/ph.h b/jemalloc-4.5.0/include/jemalloc/internal/ph.h
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/ph.h
rename to jemalloc-4.5.0/include/jemalloc/internal/ph.h
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/private_namespace.sh b/jemalloc-4.5.0/include/jemalloc/internal/private_namespace.sh
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/private_namespace.sh
rename to jemalloc-4.5.0/include/jemalloc/internal/private_namespace.sh
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/private_symbols.txt b/jemalloc-4.5.0/include/jemalloc/internal/private_symbols.txt
similarity index 98%
rename from jemalloc-4.4.0/include/jemalloc/internal/private_symbols.txt
rename to jemalloc-4.5.0/include/jemalloc/internal/private_symbols.txt
index c1c6c40..60b57e5 100644
--- a/jemalloc-4.4.0/include/jemalloc/internal/private_symbols.txt
+++ b/jemalloc-4.5.0/include/jemalloc/internal/private_symbols.txt
@@ -223,6 +223,8 @@ extent_node_sn_get
 extent_node_sn_set
 extent_node_zeroed_get
 extent_node_zeroed_set
+extent_size_quantize_ceil
+extent_size_quantize_floor
 extent_tree_ad_destroy
 extent_tree_ad_destroy_recurse
 extent_tree_ad_empty
@@ -390,6 +392,7 @@ opt_quarantine
 opt_redzone
 opt_stats_print
 opt_tcache
+opt_thp
 opt_utrace
 opt_xmalloc
 opt_zero
@@ -529,6 +532,9 @@ tcache_flush
 tcache_get
 tcache_get_hard
 tcache_maxclass
+tcache_postfork_child
+tcache_postfork_parent
+tcache_prefork
 tcache_salloc
 tcache_stats_merge
 tcaches
@@ -612,14 +618,16 @@ valgrind_freelike_block
 valgrind_make_mem_defined
 valgrind_make_mem_noaccess
 valgrind_make_mem_undefined
+witness_assert_depth
+witness_assert_depth_to_rank
 witness_assert_lockless
 witness_assert_not_owner
 witness_assert_owner
+witness_depth_error
 witness_fork_cleanup
 witness_init
 witness_lock
 witness_lock_error
-witness_lockless_error
 witness_not_owner_error
 witness_owner
 witness_owner_error
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/private_unnamespace.sh b/jemalloc-4.5.0/include/jemalloc/internal/private_unnamespace.sh
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/private_unnamespace.sh
rename to jemalloc-4.5.0/include/jemalloc/internal/private_unnamespace.sh
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/prng.h b/jemalloc-4.5.0/include/jemalloc/internal/prng.h
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/prng.h
rename to jemalloc-4.5.0/include/jemalloc/internal/prng.h
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/prof.h b/jemalloc-4.5.0/include/jemalloc/internal/prof.h
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/prof.h
rename to jemalloc-4.5.0/include/jemalloc/internal/prof.h
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/public_namespace.sh b/jemalloc-4.5.0/include/jemalloc/internal/public_namespace.sh
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/public_namespace.sh
rename to jemalloc-4.5.0/include/jemalloc/internal/public_namespace.sh
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/public_unnamespace.sh b/jemalloc-4.5.0/include/jemalloc/internal/public_unnamespace.sh
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/public_unnamespace.sh
rename to jemalloc-4.5.0/include/jemalloc/internal/public_unnamespace.sh
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/ql.h b/jemalloc-4.5.0/include/jemalloc/internal/ql.h
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/ql.h
rename to jemalloc-4.5.0/include/jemalloc/internal/ql.h
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/qr.h b/jemalloc-4.5.0/include/jemalloc/internal/qr.h
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/qr.h
rename to jemalloc-4.5.0/include/jemalloc/internal/qr.h
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/quarantine.h b/jemalloc-4.5.0/include/jemalloc/internal/quarantine.h
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/quarantine.h
rename to jemalloc-4.5.0/include/jemalloc/internal/quarantine.h
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/rb.h b/jemalloc-4.5.0/include/jemalloc/internal/rb.h
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/rb.h
rename to jemalloc-4.5.0/include/jemalloc/internal/rb.h
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/rtree.h b/jemalloc-4.5.0/include/jemalloc/internal/rtree.h
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/rtree.h
rename to jemalloc-4.5.0/include/jemalloc/internal/rtree.h
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/size_classes.sh b/jemalloc-4.5.0/include/jemalloc/internal/size_classes.sh
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/size_classes.sh
rename to jemalloc-4.5.0/include/jemalloc/internal/size_classes.sh
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/smoothstep.h b/jemalloc-4.5.0/include/jemalloc/internal/smoothstep.h
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/smoothstep.h
rename to jemalloc-4.5.0/include/jemalloc/internal/smoothstep.h
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/smoothstep.sh b/jemalloc-4.5.0/include/jemalloc/internal/smoothstep.sh
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/smoothstep.sh
rename to jemalloc-4.5.0/include/jemalloc/internal/smoothstep.sh
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/spin.h b/jemalloc-4.5.0/include/jemalloc/internal/spin.h
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/spin.h
rename to jemalloc-4.5.0/include/jemalloc/internal/spin.h
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/stats.h b/jemalloc-4.5.0/include/jemalloc/internal/stats.h
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/stats.h
rename to jemalloc-4.5.0/include/jemalloc/internal/stats.h
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/tcache.h b/jemalloc-4.5.0/include/jemalloc/internal/tcache.h
similarity index 99%
rename from jemalloc-4.4.0/include/jemalloc/internal/tcache.h
rename to jemalloc-4.5.0/include/jemalloc/internal/tcache.h
index 01ba062..5fe5ebf 100644
--- a/jemalloc-4.4.0/include/jemalloc/internal/tcache.h
+++ b/jemalloc-4.5.0/include/jemalloc/internal/tcache.h
@@ -149,6 +149,9 @@ bool	tcaches_create(tsd_t *tsd, unsigned *r_ind);
 void	tcaches_flush(tsd_t *tsd, unsigned ind);
 void	tcaches_destroy(tsd_t *tsd, unsigned ind);
 bool	tcache_boot(tsdn_t *tsdn);
+void tcache_prefork(tsdn_t *tsdn);
+void tcache_postfork_parent(tsdn_t *tsdn);
+void tcache_postfork_child(tsdn_t *tsdn);
 
 #endif /* JEMALLOC_H_EXTERNS */
 /******************************************************************************/
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/ticker.h b/jemalloc-4.5.0/include/jemalloc/internal/ticker.h
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/ticker.h
rename to jemalloc-4.5.0/include/jemalloc/internal/ticker.h
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/tsd.h b/jemalloc-4.5.0/include/jemalloc/internal/tsd.h
similarity index 99%
rename from jemalloc-4.4.0/include/jemalloc/internal/tsd.h
rename to jemalloc-4.5.0/include/jemalloc/internal/tsd.h
index 9055aca..9f37433 100644
--- a/jemalloc-4.4.0/include/jemalloc/internal/tsd.h
+++ b/jemalloc-4.5.0/include/jemalloc/internal/tsd.h
@@ -479,13 +479,14 @@ a_name##tsd_wrapper_get(bool init)					\
 									\
 	if (init && unlikely(wrapper == NULL)) {			\
 		tsd_init_block_t block;					\
-		wrapper = tsd_init_check_recursion(			\
-		    &a_name##tsd_init_head, &block);			\
+		wrapper = (a_name##tsd_wrapper_t *)			\
+		    tsd_init_check_recursion(&a_name##tsd_init_head,	\
+		    &block);						\
 		if (wrapper)						\
 		    return (wrapper);					\
 		wrapper = (a_name##tsd_wrapper_t *)			\
 		    malloc_tsd_malloc(sizeof(a_name##tsd_wrapper_t));	\
-		block.data = wrapper;					\
+		block.data = (void *)wrapper;				\
 		if (wrapper == NULL) {					\
 			malloc_write("<jemalloc>: Error allocating"	\
 			    " TSD for "#a_name"\n");			\
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/util.h b/jemalloc-4.5.0/include/jemalloc/internal/util.h
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/util.h
rename to jemalloc-4.5.0/include/jemalloc/internal/util.h
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/valgrind.h b/jemalloc-4.5.0/include/jemalloc/internal/valgrind.h
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/internal/valgrind.h
rename to jemalloc-4.5.0/include/jemalloc/internal/valgrind.h
diff --git a/jemalloc-4.4.0/include/jemalloc/internal/witness.h b/jemalloc-4.5.0/include/jemalloc/internal/witness.h
similarity index 78%
rename from jemalloc-4.4.0/include/jemalloc/internal/witness.h
rename to jemalloc-4.5.0/include/jemalloc/internal/witness.h
index cdf15d7..30d8c7e 100644
--- a/jemalloc-4.4.0/include/jemalloc/internal/witness.h
+++ b/jemalloc-4.5.0/include/jemalloc/internal/witness.h
@@ -12,21 +12,32 @@ typedef int witness_comp_t (const witness_t *, const witness_t *);
  */
 #define	WITNESS_RANK_OMIT		0U
 
+#define WITNESS_RANK_MIN		1U
+
 #define	WITNESS_RANK_INIT		1U
 #define	WITNESS_RANK_CTL		1U
-#define	WITNESS_RANK_ARENAS		2U
+#define WITNESS_RANK_TCACHES		2U
+#define	WITNESS_RANK_ARENAS		3U
+
+#define	WITNESS_RANK_PROF_DUMP		4U
+#define	WITNESS_RANK_PROF_BT2GCTX	5U
+#define	WITNESS_RANK_PROF_TDATAS	6U
+#define	WITNESS_RANK_PROF_TDATA		7U
+#define	WITNESS_RANK_PROF_GCTX		8U
 
-#define	WITNESS_RANK_PROF_DUMP		3U
-#define	WITNESS_RANK_PROF_BT2GCTX	4U
-#define	WITNESS_RANK_PROF_TDATAS	5U
-#define	WITNESS_RANK_PROF_TDATA		6U
-#define	WITNESS_RANK_PROF_GCTX		7U
+/*
+ * Used as an argument to witness_assert_depth_to_rank() in order to validate
+ * depth excluding non-core locks with lower ranks.  Since the rank argument to
+ * witness_assert_depth_to_rank() is inclusive rather than exclusive, this
+ * definition can have the same value as the minimally ranked core lock.
+ */
+#define WITNESS_RANK_CORE		9U
 
-#define	WITNESS_RANK_ARENA		8U
-#define	WITNESS_RANK_ARENA_CHUNKS	9U
-#define	WITNESS_RANK_ARENA_NODE_CACHE	10
+#define	WITNESS_RANK_ARENA		9U
+#define	WITNESS_RANK_ARENA_CHUNKS	10U
+#define	WITNESS_RANK_ARENA_NODE_CACHE	11U
 
-#define	WITNESS_RANK_BASE		11U
+#define	WITNESS_RANK_BASE		12U
 
 #define	WITNESS_RANK_LEAF		0xffffffffU
 #define	WITNESS_RANK_ARENA_BIN		WITNESS_RANK_LEAF
@@ -91,10 +102,12 @@ extern witness_not_owner_error_t *witness_not_owner_error;
 void	witness_not_owner_error(const witness_t *witness);
 #endif
 #ifdef JEMALLOC_JET
-typedef void (witness_lockless_error_t)(const witness_list_t *);
-extern witness_lockless_error_t *witness_lockless_error;
+typedef void (witness_depth_error_t)(const witness_list_t *,
+    witness_rank_t rank_inclusive, unsigned depth);
+extern witness_depth_error_t *witness_depth_error;
 #else
-void	witness_lockless_error(const witness_list_t *witnesses);
+void	witness_depth_error(const witness_list_t *witnesses,
+    witness_rank_t rank_inclusive, unsigned depth);
 #endif
 
 void	witnesses_cleanup(tsd_t *tsd);
@@ -111,6 +124,9 @@ void	witness_postfork_child(tsd_t *tsd);
 bool	witness_owner(tsd_t *tsd, const witness_t *witness);
 void	witness_assert_owner(tsdn_t *tsdn, const witness_t *witness);
 void	witness_assert_not_owner(tsdn_t *tsdn, const witness_t *witness);
+void witness_assert_depth_to_rank(tsdn_t *tsdn, witness_rank_t rank_inclusive,
+    unsigned depth);
+void witness_assert_depth(tsdn_t *tsdn, unsigned depth);
 void	witness_assert_lockless(tsdn_t *tsdn);
 void	witness_lock(tsdn_t *tsdn, witness_t *witness);
 void	witness_unlock(tsdn_t *tsdn, witness_t *witness);
@@ -123,6 +139,8 @@ witness_owner(tsd_t *tsd, const witness_t *witness)
 	witness_list_t *witnesses;
 	witness_t *w;
 
+	cassert(config_debug);
+
 	witnesses = tsd_witnessesp_get(tsd);
 	ql_foreach(w, witnesses, link) {
 		if (w == witness)
@@ -175,9 +193,10 @@ witness_assert_not_owner(tsdn_t *tsdn, const witness_t *witness)
 }
 
 JEMALLOC_INLINE void
-witness_assert_lockless(tsdn_t *tsdn)
-{
+witness_assert_depth_to_rank(tsdn_t *tsdn, witness_rank_t rank_inclusive,
+    unsigned depth) {
 	tsd_t *tsd;
+	unsigned d;
 	witness_list_t *witnesses;
 	witness_t *w;
 
@@ -188,10 +207,29 @@ witness_assert_lockless(tsdn_t *tsdn)
 		return;
 	tsd = tsdn_tsd(tsdn);
 
+	d = 0;
 	witnesses = tsd_witnessesp_get(tsd);
 	w = ql_last(witnesses, link);
-	if (w != NULL)
-		witness_lockless_error(witnesses);
+	if (w != NULL) {
+		ql_reverse_foreach(w, witnesses, link) {
+			if (w->rank < rank_inclusive) {
+				break;
+			}
+			d++;
+		}
+	}
+	if (d != depth)
+		witness_depth_error(witnesses, rank_inclusive, depth);
+}
+
+JEMALLOC_INLINE void
+witness_assert_depth(tsdn_t *tsdn, unsigned depth) {
+	witness_assert_depth_to_rank(tsdn, WITNESS_RANK_MIN, depth);
+}
+
+JEMALLOC_INLINE void
+witness_assert_lockless(tsdn_t *tsdn) {
+	witness_assert_depth(tsdn, 0);
 }
 
 JEMALLOC_INLINE void
diff --git a/jemalloc-4.4.0/include/jemalloc/jemalloc.sh b/jemalloc-4.5.0/include/jemalloc/jemalloc.sh
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/jemalloc.sh
rename to jemalloc-4.5.0/include/jemalloc/jemalloc.sh
diff --git a/jemalloc-4.4.0/include/jemalloc/jemalloc_defs.h.in b/jemalloc-4.5.0/include/jemalloc/jemalloc_defs.h.in
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/jemalloc_defs.h.in
rename to jemalloc-4.5.0/include/jemalloc/jemalloc_defs.h.in
diff --git a/jemalloc-4.4.0/include/jemalloc/jemalloc_macros.h.in b/jemalloc-4.5.0/include/jemalloc/jemalloc_macros.h.in
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/jemalloc_macros.h.in
rename to jemalloc-4.5.0/include/jemalloc/jemalloc_macros.h.in
diff --git a/jemalloc-4.4.0/include/jemalloc/jemalloc_mangle.sh b/jemalloc-4.5.0/include/jemalloc/jemalloc_mangle.sh
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/jemalloc_mangle.sh
rename to jemalloc-4.5.0/include/jemalloc/jemalloc_mangle.sh
diff --git a/jemalloc-4.4.0/include/jemalloc/jemalloc_protos.h.in b/jemalloc-4.5.0/include/jemalloc/jemalloc_protos.h.in
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/jemalloc_protos.h.in
rename to jemalloc-4.5.0/include/jemalloc/jemalloc_protos.h.in
diff --git a/jemalloc-4.4.0/include/jemalloc/jemalloc_rename.sh b/jemalloc-4.5.0/include/jemalloc/jemalloc_rename.sh
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/jemalloc_rename.sh
rename to jemalloc-4.5.0/include/jemalloc/jemalloc_rename.sh
diff --git a/jemalloc-4.4.0/include/jemalloc/jemalloc_typedefs.h.in b/jemalloc-4.5.0/include/jemalloc/jemalloc_typedefs.h.in
similarity index 100%
rename from jemalloc-4.4.0/include/jemalloc/jemalloc_typedefs.h.in
rename to jemalloc-4.5.0/include/jemalloc/jemalloc_typedefs.h.in
diff --git a/jemalloc-4.4.0/include/msvc_compat/C99/stdbool.h b/jemalloc-4.5.0/include/msvc_compat/C99/stdbool.h
similarity index 100%
rename from jemalloc-4.4.0/include/msvc_compat/C99/stdbool.h
rename to jemalloc-4.5.0/include/msvc_compat/C99/stdbool.h
diff --git a/jemalloc-4.4.0/include/msvc_compat/C99/stdint.h b/jemalloc-4.5.0/include/msvc_compat/C99/stdint.h
similarity index 100%
rename from jemalloc-4.4.0/include/msvc_compat/C99/stdint.h
rename to jemalloc-4.5.0/include/msvc_compat/C99/stdint.h
diff --git a/jemalloc-4.4.0/include/msvc_compat/strings.h b/jemalloc-4.5.0/include/msvc_compat/strings.h
similarity index 100%
rename from jemalloc-4.4.0/include/msvc_compat/strings.h
rename to jemalloc-4.5.0/include/msvc_compat/strings.h
diff --git a/jemalloc-4.4.0/include/msvc_compat/windows_extra.h b/jemalloc-4.5.0/include/msvc_compat/windows_extra.h
similarity index 100%
rename from jemalloc-4.4.0/include/msvc_compat/windows_extra.h
rename to jemalloc-4.5.0/include/msvc_compat/windows_extra.h
diff --git a/jemalloc-4.4.0/jemalloc.pc.in b/jemalloc-4.5.0/jemalloc.pc.in
similarity index 100%
rename from jemalloc-4.4.0/jemalloc.pc.in
rename to jemalloc-4.5.0/jemalloc.pc.in
diff --git a/jemalloc-4.4.0/msvc/ReadMe.txt b/jemalloc-4.5.0/msvc/ReadMe.txt
similarity index 100%
rename from jemalloc-4.4.0/msvc/ReadMe.txt
rename to jemalloc-4.5.0/msvc/ReadMe.txt
diff --git a/jemalloc-4.4.0/msvc/jemalloc_vc2015.sln b/jemalloc-4.5.0/msvc/jemalloc_vc2015.sln
similarity index 100%
rename from jemalloc-4.4.0/msvc/jemalloc_vc2015.sln
rename to jemalloc-4.5.0/msvc/jemalloc_vc2015.sln
diff --git a/jemalloc-4.4.0/msvc/projects/vc2015/jemalloc/jemalloc.vcxproj b/jemalloc-4.5.0/msvc/projects/vc2015/jemalloc/jemalloc.vcxproj
similarity index 100%
rename from jemalloc-4.4.0/msvc/projects/vc2015/jemalloc/jemalloc.vcxproj
rename to jemalloc-4.5.0/msvc/projects/vc2015/jemalloc/jemalloc.vcxproj
diff --git a/jemalloc-4.4.0/msvc/projects/vc2015/jemalloc/jemalloc.vcxproj.filters b/jemalloc-4.5.0/msvc/projects/vc2015/jemalloc/jemalloc.vcxproj.filters
similarity index 100%
rename from jemalloc-4.4.0/msvc/projects/vc2015/jemalloc/jemalloc.vcxproj.filters
rename to jemalloc-4.5.0/msvc/projects/vc2015/jemalloc/jemalloc.vcxproj.filters
diff --git a/jemalloc-4.4.0/msvc/projects/vc2015/test_threads/test_threads.cpp b/jemalloc-4.5.0/msvc/projects/vc2015/test_threads/test_threads.cpp
old mode 100755
new mode 100644
similarity index 100%
rename from jemalloc-4.4.0/msvc/projects/vc2015/test_threads/test_threads.cpp
rename to jemalloc-4.5.0/msvc/projects/vc2015/test_threads/test_threads.cpp
diff --git a/jemalloc-4.4.0/msvc/projects/vc2015/test_threads/test_threads.h b/jemalloc-4.5.0/msvc/projects/vc2015/test_threads/test_threads.h
similarity index 100%
rename from jemalloc-4.4.0/msvc/projects/vc2015/test_threads/test_threads.h
rename to jemalloc-4.5.0/msvc/projects/vc2015/test_threads/test_threads.h
diff --git a/jemalloc-4.4.0/msvc/projects/vc2015/test_threads/test_threads.vcxproj b/jemalloc-4.5.0/msvc/projects/vc2015/test_threads/test_threads.vcxproj
similarity index 100%
rename from jemalloc-4.4.0/msvc/projects/vc2015/test_threads/test_threads.vcxproj
rename to jemalloc-4.5.0/msvc/projects/vc2015/test_threads/test_threads.vcxproj
diff --git a/jemalloc-4.4.0/msvc/projects/vc2015/test_threads/test_threads.vcxproj.filters b/jemalloc-4.5.0/msvc/projects/vc2015/test_threads/test_threads.vcxproj.filters
similarity index 100%
rename from jemalloc-4.4.0/msvc/projects/vc2015/test_threads/test_threads.vcxproj.filters
rename to jemalloc-4.5.0/msvc/projects/vc2015/test_threads/test_threads.vcxproj.filters
diff --git a/jemalloc-4.4.0/msvc/projects/vc2015/test_threads/test_threads_main.cpp b/jemalloc-4.5.0/msvc/projects/vc2015/test_threads/test_threads_main.cpp
similarity index 100%
rename from jemalloc-4.4.0/msvc/projects/vc2015/test_threads/test_threads_main.cpp
rename to jemalloc-4.5.0/msvc/projects/vc2015/test_threads/test_threads_main.cpp
diff --git a/jemalloc-4.5.0/scripts/gen_travis.py b/jemalloc-4.5.0/scripts/gen_travis.py
new file mode 100755
index 0000000..ccbcaf8
--- /dev/null
+++ b/jemalloc-4.5.0/scripts/gen_travis.py
@@ -0,0 +1,85 @@
+#!/usr/bin/env python
+
+from itertools import combinations
+
+travis_template = """\
+language: generic
+
+matrix:
+  include:
+%s
+
+before_script:
+  - autoconf
+  - ./configure ${COMPILER_FLAGS:+ \
+      CC="$CC $COMPILER_FLAGS" } \
+      $CONFIGURE_FLAGS
+  - make -j3
+  - make -j3 tests
+
+script:
+  - make check
+"""
+
+# The 'default' configuration is gcc, on linux, with no compiler or configure
+# flags.  We also test with clang, -m32, --enable-debug, --enable-prof,
+# --disable-stats, and --disable-tcache.  To avoid abusing travis though, we
+# don't test all 2**7 = 128 possible combinations of these; instead, we only
+# test combinations of up to 2 'unusual' settings, under the hope that bugs
+# involving interactions of such settings are rare.
+# things at once, for C(7, 0) + C(7, 1) + C(7, 2) = 29
+MAX_UNUSUAL_OPTIONS = 2
+
+os_default = 'linux'
+os_unusual = 'osx'
+
+compilers_default = 'CC=gcc'
+compilers_unusual = 'CC=clang'
+
+compiler_flag_unusuals = ['-m32']
+
+configure_flag_unusuals = [
+    '--enable-debug', '--enable-prof', '--disable-stats', '--disable-tcache',
+]
+
+all_unusuals = (
+    [os_unusual] + [compilers_unusual] + compiler_flag_unusuals
+    + configure_flag_unusuals
+)
+
+unusual_combinations_to_test = []
+for i in xrange(MAX_UNUSUAL_OPTIONS + 1):
+    unusual_combinations_to_test += combinations(all_unusuals, i)
+
+include_rows = ""
+for unusual_combination in unusual_combinations_to_test:
+    os = os_default
+    if os_unusual in unusual_combination:
+        os = os_unusual
+
+    compilers = compilers_default
+    if compilers_unusual in unusual_combination:
+        compilers = compilers_unusual
+
+    compiler_flags = [
+        x for x in unusual_combination if x in compiler_flag_unusuals]
+
+    configure_flags = [
+        x for x in unusual_combination if x in configure_flag_unusuals]
+
+    # Filter out an unsupported configuration - heap profiling on OS X.
+    if os == 'osx' and '--enable-prof' in configure_flags:
+        continue
+
+    env_string = '{} COMPILER_FLAGS="{}" CONFIGURE_FLAGS="{}"'.format(
+        compilers, " ".join(compiler_flags), " ".join(configure_flags))
+
+    include_rows += '    - os: %s\n' % os
+    include_rows += '      env: %s\n' % env_string
+    if '-m32' in unusual_combination and os == 'linux':
+        include_rows += '      addons:\n'
+	include_rows += '        apt:\n'
+	include_rows += '          packages:\n'
+	include_rows += '            - gcc-multilib\n'
+
+print travis_template % include_rows
diff --git a/jemalloc-4.4.0/src/arena.c b/jemalloc-4.5.0/src/arena.c
similarity index 96%
rename from jemalloc-4.4.0/src/arena.c
rename to jemalloc-4.5.0/src/arena.c
index 648a8da..a9dff0b 100644
--- a/jemalloc-4.4.0/src/arena.c
+++ b/jemalloc-4.5.0/src/arena.c
@@ -4,6 +4,8 @@
 /******************************************************************************/
 /* Data. */
 
+bool		opt_thp = true;
+static bool	thp_initially_huge;
 purge_mode_t	opt_purge = PURGE_DEFAULT;
 const char	*purge_mode_names[] = {
 	"ratio",
@@ -568,8 +570,8 @@ arena_chunk_init_spare(arena_t *arena)
 }
 
 static bool
-arena_chunk_register(tsdn_t *tsdn, arena_t *arena, arena_chunk_t *chunk,
-    size_t sn, bool zero)
+arena_chunk_register(arena_t *arena, arena_chunk_t *chunk, size_t sn, bool zero,
+    bool *gdump)
 {
 
 	/*
@@ -580,7 +582,7 @@ arena_chunk_register(tsdn_t *tsdn, arena_t *arena, arena_chunk_t *chunk,
 	 */
 	extent_node_init(&chunk->node, arena, chunk, chunksize, sn, zero, true);
 	extent_node_achunk_set(&chunk->node, true);
-	return (chunk_register(tsdn, chunk, &chunk->node));
+	return (chunk_register(chunk, &chunk->node, gdump));
 }
 
 static arena_chunk_t *
@@ -591,6 +593,8 @@ arena_chunk_alloc_internal_hard(tsdn_t *tsdn, arena_t *arena,
 	size_t sn;
 
 	malloc_mutex_unlock(tsdn, &arena->lock);
+	/* prof_gdump() requirement. */
+	witness_assert_depth_to_rank(tsdn, WITNESS_RANK_CORE, 0);
 
 	chunk = (arena_chunk_t *)chunk_alloc_wrapper(tsdn, arena, chunk_hooks,
 	    NULL, chunksize, chunksize, &sn, zero, commit);
@@ -603,16 +607,20 @@ arena_chunk_alloc_internal_hard(tsdn_t *tsdn, arena_t *arena,
 			chunk = NULL;
 		}
 	}
-	if (chunk != NULL && arena_chunk_register(tsdn, arena, chunk, sn,
-	    *zero)) {
-		if (!*commit) {
-			/* Undo commit of header. */
-			chunk_hooks->decommit(chunk, chunksize, 0, map_bias <<
-			    LG_PAGE, arena->ind);
+	if (chunk != NULL) {
+		bool gdump;
+		if (arena_chunk_register(arena, chunk, sn, *zero, &gdump)) {
+			if (!*commit) {
+				/* Undo commit of header. */
+				chunk_hooks->decommit(chunk, chunksize, 0,
+				    map_bias << LG_PAGE, arena->ind);
+			}
+			chunk_dalloc_wrapper(tsdn, arena, chunk_hooks,
+			    (void *)chunk, chunksize, sn, *zero, *commit);
+			chunk = NULL;
 		}
-		chunk_dalloc_wrapper(tsdn, arena, chunk_hooks, (void *)chunk,
-		    chunksize, sn, *zero, *commit);
-		chunk = NULL;
+		if (config_prof && opt_prof && gdump)
+			prof_gdump(tsdn);
 	}
 
 	malloc_mutex_lock(tsdn, &arena->lock);
@@ -627,14 +635,24 @@ arena_chunk_alloc_internal(tsdn_t *tsdn, arena_t *arena, bool *zero,
 	chunk_hooks_t chunk_hooks = CHUNK_HOOKS_INITIALIZER;
 	size_t sn;
 
+	/* prof_gdump() requirement. */
+	witness_assert_depth_to_rank(tsdn, WITNESS_RANK_CORE, 1);
+	malloc_mutex_assert_owner(tsdn, &arena->lock);
+
 	chunk = chunk_alloc_cache(tsdn, arena, &chunk_hooks, NULL, chunksize,
 	    chunksize, &sn, zero, commit, true);
 	if (chunk != NULL) {
-		if (arena_chunk_register(tsdn, arena, chunk, sn, *zero)) {
+		bool gdump;
+		if (arena_chunk_register(arena, chunk, sn, *zero, &gdump)) {
 			chunk_dalloc_cache(tsdn, arena, &chunk_hooks, chunk,
 			    chunksize, sn, true);
 			return (NULL);
 		}
+		if (config_prof && opt_prof && gdump) {
+			malloc_mutex_unlock(tsdn, &arena->lock);
+			prof_gdump(tsdn);
+			malloc_mutex_lock(tsdn, &arena->lock);
+		}
 	}
 	if (chunk == NULL) {
 		chunk = arena_chunk_alloc_internal_hard(tsdn, arena,
@@ -664,7 +682,9 @@ arena_chunk_init_hard(tsdn_t *tsdn, arena_t *arena)
 	if (chunk == NULL)
 		return (NULL);
 
-	chunk->hugepage = true;
+	if (config_thp && opt_thp) {
+		chunk->hugepage = thp_initially_huge;
+	}
 
 	/*
 	 * Initialize the map to contain one maximal free untouched run.  Mark
@@ -729,14 +749,17 @@ arena_chunk_alloc(tsdn_t *tsdn, arena_t *arena)
 static void
 arena_chunk_discard(tsdn_t *tsdn, arena_t *arena, arena_chunk_t *chunk)
 {
-	size_t sn, hugepage;
+	size_t sn;
+	UNUSED bool hugepage JEMALLOC_CC_SILENCE_INIT(false);
 	bool committed;
 	chunk_hooks_t chunk_hooks = CHUNK_HOOKS_INITIALIZER;
 
 	chunk_deregister(chunk, &chunk->node);
 
 	sn = extent_node_sn_get(&chunk->node);
-	hugepage = chunk->hugepage;
+	if (config_thp && opt_thp) {
+		hugepage = chunk->hugepage;
+	}
 	committed = (arena_mapbits_decommitted_get(chunk, map_bias) == 0);
 	if (!committed) {
 		/*
@@ -749,13 +772,16 @@ arena_chunk_discard(tsdn_t *tsdn, arena_t *arena, arena_chunk_t *chunk)
 		chunk_hooks.decommit(chunk, chunksize, 0, map_bias << LG_PAGE,
 		    arena->ind);
 	}
-	if (!hugepage) {
+	if (config_thp && opt_thp && hugepage != thp_initially_huge) {
 		/*
-		 * Convert chunk back to the default state, so that all
-		 * subsequent chunk allocations start out with chunks that can
-		 * be backed by transparent huge pages.
+		 * Convert chunk back to initial THP state, so that all
+		 * subsequent chunk allocations start out in a consistent state.
 		 */
-		pages_huge(chunk, chunksize);
+		if (thp_initially_huge) {
+			pages_huge(chunk, chunksize);
+		} else {
+			pages_nohuge(chunk, chunksize);
+		}
 	}
 
 	chunk_dalloc_cache(tsdn, arena, &chunk_hooks, (void *)chunk, chunksize,
@@ -1695,13 +1721,13 @@ arena_purge_stashed(tsdn_t *tsdn, arena_t *arena, chunk_hooks_t *chunk_hooks,
 
 			/*
 			 * If this is the first run purged within chunk, mark
-			 * the chunk as non-huge.  This will prevent all use of
-			 * transparent huge pages for this chunk until the chunk
-			 * as a whole is deallocated.
+			 * the chunk as non-THP-capable.  This will prevent all
+			 * use of THPs for this chunk until the chunk as a whole
+			 * is deallocated.
 			 */
-			if (chunk->hugepage) {
-				pages_nohuge(chunk, chunksize);
-				chunk->hugepage = false;
+			if (config_thp && opt_thp && chunk->hugepage) {
+				chunk->hugepage = pages_nohuge(chunk,
+				    chunksize);
 			}
 
 			assert(pageind + npages <= chunk_npages);
@@ -2694,6 +2720,7 @@ arena_malloc_hard(tsdn_t *tsdn, arena_t *arena, size_t size, szind_t ind,
 		return (arena_malloc_small(tsdn, arena, ind, zero));
 	if (likely(size <= large_maxclass))
 		return (arena_malloc_large(tsdn, arena, ind, zero));
+	assert(index2size(ind) >= chunksize);
 	return (huge_malloc(tsdn, arena, index2size(ind), zero));
 }
 
@@ -3755,11 +3782,78 @@ bin_info_init(void)
 #undef SC
 }
 
+static void
+init_thp_initially_huge(void) {
+	int fd;
+	char buf[sizeof("[always] madvise never\n")];
+	ssize_t nread;
+	static const char *enabled_states[] = {
+		"[always] madvise never\n",
+		"always [madvise] never\n",
+		"always madvise [never]\n"
+	};
+	static const bool thp_initially_huge_states[] = {
+		true,
+		false,
+		false
+	};
+	unsigned i;
+
+	if (config_debug) {
+		for (i = 0; i < sizeof(enabled_states)/sizeof(const char *);
+		    i++) {
+			assert(sizeof(buf) > strlen(enabled_states[i]));
+		}
+	}
+	assert(sizeof(enabled_states)/sizeof(const char *) ==
+	    sizeof(thp_initially_huge_states)/sizeof(bool));
+
+#if defined(JEMALLOC_USE_SYSCALL) && defined(SYS_open)
+	fd = (int)syscall(SYS_open,
+	    "/sys/kernel/mm/transparent_hugepage/enabled", O_RDONLY);
+#else
+	fd = open("/sys/kernel/mm/transparent_hugepage/enabled", O_RDONLY);
+#endif
+	if (fd == -1) {
+		goto label_error;
+	}
+
+#if defined(JEMALLOC_USE_SYSCALL) && defined(SYS_read)
+	nread = (ssize_t)syscall(SYS_read, fd, &buf, sizeof(buf));
+#else
+	nread = read(fd, &buf, sizeof(buf));
+#endif
+
+#if defined(JEMALLOC_USE_SYSCALL) && defined(SYS_close)
+	syscall(SYS_close, fd);
+#else
+	close(fd);
+#endif
+
+	if (nread < 1) {
+		goto label_error;
+	}
+	for (i = 0; i < sizeof(enabled_states)/sizeof(const char *);
+	    i++) {
+		if (strncmp(buf, enabled_states[i], (size_t)nread) == 0) {
+			thp_initially_huge = thp_initially_huge_states[i];
+			return;
+		}
+	}
+
+label_error:
+	thp_initially_huge = false;
+}
+
 void
 arena_boot(void)
 {
 	unsigned i;
 
+	if (config_thp && opt_thp) {
+		init_thp_initially_huge();
+	}
+
 	arena_lg_dirty_mult_default_set(opt_lg_dirty_mult);
 	arena_decay_time_default_set(opt_decay_time);
 
@@ -3790,15 +3884,8 @@ arena_boot(void)
 	arena_maxrun = chunksize - (map_bias << LG_PAGE);
 	assert(arena_maxrun > 0);
 	large_maxclass = index2size(size2index(chunksize)-1);
-	if (large_maxclass > arena_maxrun) {
-		/*
-		 * For small chunk sizes it's possible for there to be fewer
-		 * non-header pages available than are necessary to serve the
-		 * size classes just below chunksize.
-		 */
-		large_maxclass = arena_maxrun;
-	}
 	assert(large_maxclass > 0);
+	assert(large_maxclass + large_pad <= arena_maxrun);
 	nlclasses = size2index(large_maxclass) - size2index(SMALL_MAXCLASS);
 	nhclasses = NSIZES - nlclasses - NBINS;
 
diff --git a/jemalloc-4.4.0/src/atomic.c b/jemalloc-4.5.0/src/atomic.c
similarity index 100%
rename from jemalloc-4.4.0/src/atomic.c
rename to jemalloc-4.5.0/src/atomic.c
diff --git a/jemalloc-4.4.0/src/base.c b/jemalloc-4.5.0/src/base.c
similarity index 100%
rename from jemalloc-4.4.0/src/base.c
rename to jemalloc-4.5.0/src/base.c
diff --git a/jemalloc-4.4.0/src/bitmap.c b/jemalloc-4.5.0/src/bitmap.c
similarity index 100%
rename from jemalloc-4.4.0/src/bitmap.c
rename to jemalloc-4.5.0/src/bitmap.c
diff --git a/jemalloc-4.4.0/src/chunk.c b/jemalloc-4.5.0/src/chunk.c
similarity index 98%
rename from jemalloc-4.4.0/src/chunk.c
rename to jemalloc-4.5.0/src/chunk.c
index c1c514a..94f28f2 100644
--- a/jemalloc-4.4.0/src/chunk.c
+++ b/jemalloc-4.5.0/src/chunk.c
@@ -141,7 +141,7 @@ chunk_hooks_assure_initialized(tsdn_t *tsdn, arena_t *arena,
 }
 
 bool
-chunk_register(tsdn_t *tsdn, const void *chunk, const extent_node_t *node)
+chunk_register(const void *chunk, const extent_node_t *node, bool *gdump)
 {
 
 	assert(extent_node_addr_get(node) == chunk);
@@ -160,8 +160,7 @@ chunk_register(tsdn_t *tsdn, const void *chunk, const extent_node_t *node)
 			 */
 			high = atomic_read_z(&highchunks);
 		}
-		if (cur > high && prof_gdump_get_unlocked())
-			prof_gdump(tsdn);
+		*gdump = (cur > high && prof_gdump_get_unlocked());
 	}
 
 	return (false);
@@ -189,12 +188,17 @@ chunk_deregister(const void *chunk, const extent_node_t *node)
 static extent_node_t *
 chunk_first_best_fit(arena_t *arena, extent_tree_t *chunks_szsnad, size_t size)
 {
+	extent_node_t *node;
+	size_t qsize;
 	extent_node_t key;
 
 	assert(size == CHUNK_CEILING(size));
 
-	extent_node_init(&key, arena, NULL, size, 0, false, false);
-	return (extent_tree_szsnad_nsearch(chunks_szsnad, &key));
+	qsize = extent_size_quantize_ceil(size);
+	extent_node_init(&key, arena, NULL, qsize, 0, false, false);
+	node = extent_tree_szsnad_nsearch(chunks_szsnad, &key);
+	assert(node == NULL || extent_node_size_get(node) >= size);
+	return node;
 }
 
 static void *
diff --git a/jemalloc-4.4.0/src/chunk_dss.c b/jemalloc-4.5.0/src/chunk_dss.c
similarity index 84%
rename from jemalloc-4.4.0/src/chunk_dss.c
rename to jemalloc-4.5.0/src/chunk_dss.c
index ee3f838..8c67939 100644
--- a/jemalloc-4.4.0/src/chunk_dss.c
+++ b/jemalloc-4.5.0/src/chunk_dss.c
@@ -115,8 +115,9 @@ chunk_alloc_dss(tsdn_t *tsdn, arena_t *arena, void *new_addr, size_t size,
 		 * malloc.
 		 */
 		while (true) {
-			void *ret, *cpad, *max_cur, *dss_next, *dss_prev;
-			size_t gap_size, cpad_size;
+			void *ret, *max_cur, *dss_next, *dss_prev;
+			void *gap_addr_chunk, *gap_addr_subchunk;
+			size_t gap_size_chunk, gap_size_subchunk;
 			intptr_t incr;
 
 			max_cur = chunk_dss_max_update(new_addr);
@@ -124,25 +125,32 @@ chunk_alloc_dss(tsdn_t *tsdn, arena_t *arena, void *new_addr, size_t size,
 				goto label_oom;
 
 			/*
-			 * Calculate how much padding is necessary to
-			 * chunk-align the end of the DSS.
-			 */
-			gap_size = (chunksize - CHUNK_ADDR2OFFSET(dss_max)) &
-			    chunksize_mask;
-			/*
-			 * Compute how much chunk-aligned pad space (if any) is
+			 * Compute how much chunk-aligned gap space (if any) is
 			 * necessary to satisfy alignment.  This space can be
 			 * recycled for later use.
 			 */
-			cpad = (void *)((uintptr_t)dss_max + gap_size);
-			ret = (void *)ALIGNMENT_CEILING((uintptr_t)dss_max,
-			    alignment);
-			cpad_size = (uintptr_t)ret - (uintptr_t)cpad;
+			gap_addr_chunk = (void *)(CHUNK_CEILING(
+			    (uintptr_t)max_cur));
+			ret = (void *)ALIGNMENT_CEILING(
+			    (uintptr_t)gap_addr_chunk, alignment);
+			gap_size_chunk = (uintptr_t)ret -
+			    (uintptr_t)gap_addr_chunk;
+			/*
+			 * Compute the address just past the end of the desired
+			 * allocation space.
+			 */
 			dss_next = (void *)((uintptr_t)ret + size);
-			if ((uintptr_t)ret < (uintptr_t)dss_max ||
-			    (uintptr_t)dss_next < (uintptr_t)dss_max)
+			if ((uintptr_t)ret < (uintptr_t)max_cur ||
+			    (uintptr_t)dss_next < (uintptr_t)max_cur)
 				goto label_oom; /* Wrap-around. */
-			incr = gap_size + cpad_size + size;
+			/* Compute the increment, including subchunk bytes. */
+			gap_addr_subchunk = max_cur;
+			gap_size_subchunk = (uintptr_t)ret -
+			    (uintptr_t)gap_addr_subchunk;
+			incr = gap_size_subchunk + size;
+
+			assert((uintptr_t)max_cur + incr == (uintptr_t)ret +
+			    size);
 
 			/*
 			 * Optimistically update dss_max, and roll back below if
@@ -157,11 +165,12 @@ chunk_alloc_dss(tsdn_t *tsdn, arena_t *arena, void *new_addr, size_t size,
 			dss_prev = chunk_dss_sbrk(incr);
 			if (dss_prev == max_cur) {
 				/* Success. */
-				if (cpad_size != 0) {
+				if (gap_size_chunk != 0) {
 					chunk_hooks_t chunk_hooks =
 					    CHUNK_HOOKS_INITIALIZER;
 					chunk_dalloc_wrapper(tsdn, arena,
-					    &chunk_hooks, cpad, cpad_size,
+					    &chunk_hooks, gap_addr_chunk,
+					    gap_size_chunk,
 					    arena_extent_sn_next(arena), false,
 					    true);
 				}
diff --git a/jemalloc-4.4.0/src/chunk_mmap.c b/jemalloc-4.5.0/src/chunk_mmap.c
similarity index 100%
rename from jemalloc-4.4.0/src/chunk_mmap.c
rename to jemalloc-4.5.0/src/chunk_mmap.c
diff --git a/jemalloc-4.4.0/src/ckh.c b/jemalloc-4.5.0/src/ckh.c
similarity index 100%
rename from jemalloc-4.4.0/src/ckh.c
rename to jemalloc-4.5.0/src/ckh.c
diff --git a/jemalloc-4.4.0/src/ctl.c b/jemalloc-4.5.0/src/ctl.c
similarity index 99%
rename from jemalloc-4.4.0/src/ctl.c
rename to jemalloc-4.5.0/src/ctl.c
index bc78b20..56bc4f4 100644
--- a/jemalloc-4.4.0/src/ctl.c
+++ b/jemalloc-4.5.0/src/ctl.c
@@ -84,6 +84,7 @@ CTL_PROTO(config_prof_libgcc)
 CTL_PROTO(config_prof_libunwind)
 CTL_PROTO(config_stats)
 CTL_PROTO(config_tcache)
+CTL_PROTO(config_thp)
 CTL_PROTO(config_tls)
 CTL_PROTO(config_utrace)
 CTL_PROTO(config_valgrind)
@@ -104,6 +105,7 @@ CTL_PROTO(opt_utrace)
 CTL_PROTO(opt_xmalloc)
 CTL_PROTO(opt_tcache)
 CTL_PROTO(opt_lg_tcache_max)
+CTL_PROTO(opt_thp)
 CTL_PROTO(opt_prof)
 CTL_PROTO(opt_prof_prefix)
 CTL_PROTO(opt_prof_active)
@@ -258,6 +260,7 @@ static const ctl_named_node_t	config_node[] = {
 	{NAME("prof_libunwind"), CTL(config_prof_libunwind)},
 	{NAME("stats"),		CTL(config_stats)},
 	{NAME("tcache"),	CTL(config_tcache)},
+	{NAME("thp"),		CTL(config_thp)},
 	{NAME("tls"),		CTL(config_tls)},
 	{NAME("utrace"),	CTL(config_utrace)},
 	{NAME("valgrind"),	CTL(config_valgrind)},
@@ -281,6 +284,7 @@ static const ctl_named_node_t opt_node[] = {
 	{NAME("xmalloc"),	CTL(opt_xmalloc)},
 	{NAME("tcache"),	CTL(opt_tcache)},
 	{NAME("lg_tcache_max"),	CTL(opt_lg_tcache_max)},
+	{NAME("thp"),		CTL(opt_thp)},
 	{NAME("prof"),		CTL(opt_prof)},
 	{NAME("prof_prefix"),	CTL(opt_prof_prefix)},
 	{NAME("prof_active"),	CTL(opt_prof_active)},
@@ -1268,6 +1272,7 @@ CTL_RO_CONFIG_GEN(config_prof_libgcc, bool)
 CTL_RO_CONFIG_GEN(config_prof_libunwind, bool)
 CTL_RO_CONFIG_GEN(config_stats, bool)
 CTL_RO_CONFIG_GEN(config_tcache, bool)
+CTL_RO_CONFIG_GEN(config_thp, bool)
 CTL_RO_CONFIG_GEN(config_tls, bool)
 CTL_RO_CONFIG_GEN(config_utrace, bool)
 CTL_RO_CONFIG_GEN(config_valgrind, bool)
@@ -1291,6 +1296,7 @@ CTL_RO_NL_CGEN(config_utrace, opt_utrace, opt_utrace, bool)
 CTL_RO_NL_CGEN(config_xmalloc, opt_xmalloc, opt_xmalloc, bool)
 CTL_RO_NL_CGEN(config_tcache, opt_tcache, opt_tcache, bool)
 CTL_RO_NL_CGEN(config_tcache, opt_lg_tcache_max, opt_lg_tcache_max, ssize_t)
+CTL_RO_NL_CGEN(config_thp, opt_thp, opt_thp, bool)
 CTL_RO_NL_CGEN(config_prof, opt_prof, opt_prof, bool)
 CTL_RO_NL_CGEN(config_prof, opt_prof_prefix, opt_prof_prefix, const char *)
 CTL_RO_NL_CGEN(config_prof, opt_prof_active, opt_prof_active, bool)
@@ -1476,7 +1482,6 @@ tcache_create_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, void *oldp,
 	if (!config_tcache)
 		return (ENOENT);
 
-	malloc_mutex_lock(tsd_tsdn(tsd), &ctl_mtx);
 	READONLY();
 	if (tcaches_create(tsd, &tcache_ind)) {
 		ret = EFAULT;
@@ -1486,8 +1491,7 @@ tcache_create_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, void *oldp,
 
 	ret = 0;
 label_return:
-	malloc_mutex_unlock(tsd_tsdn(tsd), &ctl_mtx);
-	return (ret);
+	return ret;
 }
 
 static int
diff --git a/jemalloc-4.4.0/src/extent.c b/jemalloc-4.5.0/src/extent.c
similarity index 65%
rename from jemalloc-4.4.0/src/extent.c
rename to jemalloc-4.5.0/src/extent.c
index 218156c..ff8de2f 100644
--- a/jemalloc-4.4.0/src/extent.c
+++ b/jemalloc-4.5.0/src/extent.c
@@ -3,13 +3,11 @@
 
 /******************************************************************************/
 
-/*
- * Round down to the nearest chunk size that can actually be requested during
- * normal huge allocation.
- */
-JEMALLOC_INLINE_C size_t
-extent_quantize(size_t size)
-{
+#ifndef JEMALLOC_JET
+static
+#endif
+size_t
+extent_size_quantize_floor(size_t size) {
 	size_t ret;
 	szind_t ind;
 
@@ -25,11 +23,32 @@ extent_quantize(size_t size)
 	return (ret);
 }
 
+size_t
+extent_size_quantize_ceil(size_t size) {
+	size_t ret;
+
+	assert(size > 0);
+
+	ret = extent_size_quantize_floor(size);
+	if (ret < size) {
+		/*
+		 * Skip a quantization that may have an adequately large extent,
+		 * because under-sized extents may be mixed in.  This only
+		 * happens when an unusual size is requested, i.e. for aligned
+		 * allocation, and is just one of several places where linear
+		 * search would potentially find sufficiently aligned available
+		 * memory somewhere lower.
+		 */
+		ret = index2size(size2index(ret  + 1));
+	}
+	return ret;
+}
+
 JEMALLOC_INLINE_C int
 extent_sz_comp(const extent_node_t *a, const extent_node_t *b)
 {
-	size_t a_qsize = extent_quantize(extent_node_size_get(a));
-	size_t b_qsize = extent_quantize(extent_node_size_get(b));
+	size_t a_qsize = extent_size_quantize_floor(extent_node_size_get(a));
+	size_t b_qsize = extent_size_quantize_floor(extent_node_size_get(b));
 
 	return ((a_qsize > b_qsize) - (a_qsize < b_qsize));
 }
diff --git a/jemalloc-4.4.0/src/hash.c b/jemalloc-4.5.0/src/hash.c
similarity index 100%
rename from jemalloc-4.4.0/src/hash.c
rename to jemalloc-4.5.0/src/hash.c
diff --git a/jemalloc-4.4.0/src/huge.c b/jemalloc-4.5.0/src/huge.c
similarity index 91%
rename from jemalloc-4.4.0/src/huge.c
rename to jemalloc-4.5.0/src/huge.c
index 8abd8c0..0fbaa41 100644
--- a/jemalloc-4.4.0/src/huge.c
+++ b/jemalloc-4.5.0/src/huge.c
@@ -15,20 +15,20 @@ huge_node_get(const void *ptr)
 }
 
 static bool
-huge_node_set(tsdn_t *tsdn, const void *ptr, extent_node_t *node)
+huge_node_set(tsdn_t *tsdn, const void *ptr, extent_node_t *node, bool *gdump)
 {
 
 	assert(extent_node_addr_get(node) == ptr);
 	assert(!extent_node_achunk_get(node));
-	return (chunk_register(tsdn, ptr, node));
+	return (chunk_register(ptr, node, gdump));
 }
 
 static void
-huge_node_reset(tsdn_t *tsdn, const void *ptr, extent_node_t *node)
+huge_node_reset(tsdn_t *tsdn, const void *ptr, extent_node_t *node, bool *gdump)
 {
 	bool err;
 
-	err = huge_node_set(tsdn, ptr, node);
+	err = huge_node_set(tsdn, ptr, node, gdump);
 	assert(!err);
 }
 
@@ -57,11 +57,13 @@ huge_palloc(tsdn_t *tsdn, arena_t *arena, size_t usize, size_t alignment,
 	arena_t *iarena;
 	extent_node_t *node;
 	size_t sn;
-	bool is_zeroed;
+	bool is_zeroed, gdump;
 
 	/* Allocate one or more contiguous chunks for this request. */
 
 	assert(!tsdn_null(tsdn) || arena != NULL);
+	/* prof_gdump() requirement. */
+	witness_assert_depth_to_rank(tsdn, WITNESS_RANK_CORE, 0);
 
 	ausize = sa2u(usize, alignment);
 	if (unlikely(ausize == 0 || ausize > HUGE_MAXCLASS))
@@ -91,11 +93,13 @@ huge_palloc(tsdn_t *tsdn, arena_t *arena, size_t usize, size_t alignment,
 
 	extent_node_init(node, arena, ret, usize, sn, is_zeroed, true);
 
-	if (huge_node_set(tsdn, ret, node)) {
+	if (huge_node_set(tsdn, ret, node, &gdump)) {
 		arena_chunk_dalloc_huge(tsdn, arena, ret, usize, sn);
 		idalloctm(tsdn, node, NULL, true, true);
 		return (NULL);
 	}
+	if (config_prof && opt_prof && gdump)
+		prof_gdump(tsdn);
 
 	/* Insert node into huge. */
 	malloc_mutex_lock(tsdn, &arena->huge_mtx);
@@ -144,7 +148,10 @@ huge_ralloc_no_move_similar(tsdn_t *tsdn, void *ptr, size_t oldsize,
 	extent_node_t *node;
 	arena_t *arena;
 	chunk_hooks_t chunk_hooks = CHUNK_HOOKS_INITIALIZER;
-	bool pre_zeroed, post_zeroed;
+	bool pre_zeroed, post_zeroed, gdump;
+
+	/* prof_gdump() requirement. */
+	witness_assert_depth_to_rank(tsdn, WITNESS_RANK_CORE, 0);
 
 	/* Increase usize to incorporate extra. */
 	for (usize = usize_min; usize < usize_max && (usize_next = s2u(usize+1))
@@ -178,10 +185,13 @@ huge_ralloc_no_move_similar(tsdn_t *tsdn, void *ptr, size_t oldsize,
 	huge_node_unset(ptr, node);
 	assert(extent_node_size_get(node) != usize);
 	extent_node_size_set(node, usize);
-	huge_node_reset(tsdn, ptr, node);
+	huge_node_reset(tsdn, ptr, node, &gdump);
 	/* Update zeroed. */
 	extent_node_zeroed_set(node, post_zeroed);
 	malloc_mutex_unlock(tsdn, &arena->huge_mtx);
+	/* gdump without any locks held. */
+	if (config_prof && opt_prof && gdump)
+		prof_gdump(tsdn);
 
 	arena_chunk_ralloc_huge_similar(tsdn, arena, ptr, oldsize, usize);
 
@@ -207,7 +217,7 @@ huge_ralloc_no_move_shrink(tsdn_t *tsdn, void *ptr, size_t oldsize,
 	arena_t *arena;
 	chunk_hooks_t chunk_hooks;
 	size_t cdiff;
-	bool pre_zeroed, post_zeroed;
+	bool pre_zeroed, post_zeroed, gdump;
 
 	node = huge_node_get(ptr);
 	arena = extent_node_arena_get(node);
@@ -215,6 +225,8 @@ huge_ralloc_no_move_shrink(tsdn_t *tsdn, void *ptr, size_t oldsize,
 	chunk_hooks = chunk_hooks_get(tsdn, arena);
 
 	assert(oldsize > usize);
+	/* prof_gdump() requirement. */
+	witness_assert_depth_to_rank(tsdn, WITNESS_RANK_CORE, 0);
 
 	/* Split excess chunks. */
 	cdiff = CHUNK_CEILING(oldsize) - CHUNK_CEILING(usize);
@@ -241,10 +253,13 @@ huge_ralloc_no_move_shrink(tsdn_t *tsdn, void *ptr, size_t oldsize,
 	/* Update the size of the huge allocation. */
 	huge_node_unset(ptr, node);
 	extent_node_size_set(node, usize);
-	huge_node_reset(tsdn, ptr, node);
+	huge_node_reset(tsdn, ptr, node, &gdump);
 	/* Update zeroed. */
 	extent_node_zeroed_set(node, post_zeroed);
 	malloc_mutex_unlock(tsdn, &arena->huge_mtx);
+	/* gdump without any locks held. */
+	if (config_prof && opt_prof && gdump)
+		prof_gdump(tsdn);
 
 	/* Zap the excess chunks. */
 	arena_chunk_ralloc_huge_shrink(tsdn, arena, ptr, oldsize, usize,
@@ -258,7 +273,7 @@ huge_ralloc_no_move_expand(tsdn_t *tsdn, void *ptr, size_t oldsize,
     size_t usize, bool zero) {
 	extent_node_t *node;
 	arena_t *arena;
-	bool is_zeroed_subchunk, is_zeroed_chunk;
+	bool is_zeroed_subchunk, is_zeroed_chunk, gdump;
 
 	node = huge_node_get(ptr);
 	arena = extent_node_arena_get(node);
@@ -266,6 +281,9 @@ huge_ralloc_no_move_expand(tsdn_t *tsdn, void *ptr, size_t oldsize,
 	is_zeroed_subchunk = extent_node_zeroed_get(node);
 	malloc_mutex_unlock(tsdn, &arena->huge_mtx);
 
+	/* prof_gdump() requirement. */
+	witness_assert_depth_to_rank(tsdn, WITNESS_RANK_CORE, 0);
+
 	/*
 	 * Use is_zeroed_chunk to detect whether the trailing memory is zeroed,
 	 * update extent's zeroed field, and zero as necessary.
@@ -280,8 +298,11 @@ huge_ralloc_no_move_expand(tsdn_t *tsdn, void *ptr, size_t oldsize,
 	extent_node_size_set(node, usize);
 	extent_node_zeroed_set(node, extent_node_zeroed_get(node) &&
 	    is_zeroed_chunk);
-	huge_node_reset(tsdn, ptr, node);
+	huge_node_reset(tsdn, ptr, node, &gdump);
 	malloc_mutex_unlock(tsdn, &arena->huge_mtx);
+	/* gdump without any locks held. */
+	if (config_prof && opt_prof && gdump)
+		prof_gdump(tsdn);
 
 	if (zero || (config_fill && unlikely(opt_zero))) {
 		if (!is_zeroed_subchunk) {
diff --git a/jemalloc-4.4.0/src/jemalloc.c b/jemalloc-4.5.0/src/jemalloc.c
similarity index 98%
rename from jemalloc-4.4.0/src/jemalloc.c
rename to jemalloc-4.5.0/src/jemalloc.c
index baead66..f73a26c 100644
--- a/jemalloc-4.4.0/src/jemalloc.c
+++ b/jemalloc-4.5.0/src/jemalloc.c
@@ -790,18 +790,19 @@ stats_print_atexit(void)
  * Begin initialization functions.
  */
 
-#ifndef JEMALLOC_HAVE_SECURE_GETENV
 static char *
-secure_getenv(const char *name)
+jemalloc_secure_getenv(const char *name)
 {
-
+#ifdef JEMALLOC_HAVE_SECURE_GETENV
+	return secure_getenv(name);
+#else
 #  ifdef JEMALLOC_HAVE_ISSETUGID
 	if (issetugid() != 0)
 		return (NULL);
 #  endif
 	return (getenv(name));
-}
 #endif
+}
 
 static unsigned
 malloc_ncpus(void)
@@ -1018,7 +1019,7 @@ malloc_conf_init(void)
 #endif
 			    ;
 
-			if ((opts = secure_getenv(envname)) != NULL) {
+			if ((opts = jemalloc_secure_getenv(envname)) != NULL) {
 				/*
 				 * Do nothing; opts is already initialized to
 				 * the value of the MALLOC_CONF environment
@@ -1074,18 +1075,18 @@ malloc_conf_init(void)
 					    k, klen, v, vlen);		\
 				} else if (clip) {			\
 					if (CONF_MIN_##check_min(um,	\
-					    (min)))			\
+					    (t)(min)))			\
 						o = (t)(min);		\
 					else if (CONF_MAX_##check_max(	\
-					    um, (max)))			\
+					    um, (t)(max)))		\
 						o = (t)(max);		\
 					else				\
 						o = (t)um;		\
 				} else {				\
 					if (CONF_MIN_##check_min(um,	\
-					    (min)) ||			\
+					    (t)(min)) ||		\
 					    CONF_MAX_##check_max(um,	\
-					    (max))) {			\
+					    (t)(max))) {		\
 						malloc_conf_error(	\
 						    "Out-of-range "	\
 						    "conf value",	\
@@ -1135,16 +1136,18 @@ malloc_conf_init(void)
 
 			CONF_HANDLE_BOOL(opt_abort, "abort", true)
 			/*
-			 * Chunks always require at least one header page,
-			 * as many as 2^(LG_SIZE_CLASS_GROUP+1) data pages, and
-			 * possibly an additional page in the presence of
-			 * redzones.  In order to simplify options processing,
-			 * use a conservative bound that accommodates all these
-			 * constraints.
+			 * Chunks always require at least one header page, as
+			 * many as 2^(LG_SIZE_CLASS_GROUP+1) data pages (plus an
+			 * additional page in the presence of cache-oblivious
+			 * large), and possibly an additional page in the
+			 * presence of redzones.  In order to simplify options
+			 * processing, use a conservative bound that
+			 * accommodates all these constraints.
 			 */
 			CONF_HANDLE_SIZE_T(opt_lg_chunk, "lg_chunk", LG_PAGE +
-			    LG_SIZE_CLASS_GROUP + (config_fill ? 2 : 1),
-			    (sizeof(size_t) << 3) - 1, yes, yes, true)
+			    LG_SIZE_CLASS_GROUP + 1 + ((config_cache_oblivious
+			    || config_fill) ? 1 : 0), (sizeof(size_t) << 3) - 1,
+			    yes, yes, true)
 			if (strncmp("dss", k, klen) == 0) {
 				int i;
 				bool match = false;
@@ -1269,6 +1272,9 @@ malloc_conf_init(void)
 				    "lg_tcache_max", -1,
 				    (sizeof(size_t) << 3) - 1)
 			}
+			if (config_thp) {
+				CONF_HANDLE_BOOL(opt_thp, "thp", true)
+			}
 			if (config_prof) {
 				CONF_HANDLE_BOOL(opt_prof, "prof", true)
 				CONF_HANDLE_CHAR_P(opt_prof_prefix,
@@ -2827,6 +2833,7 @@ _malloc_prefork(void)
 	witness_prefork(tsd);
 	/* Acquire all mutexes in a safe order. */
 	ctl_prefork(tsd_tsdn(tsd));
+	tcache_prefork(tsd_tsdn(tsd));
 	malloc_mutex_prefork(tsd_tsdn(tsd), &arenas_lock);
 	prof_prefork0(tsd_tsdn(tsd));
 	for (i = 0; i < 3; i++) {
@@ -2886,6 +2893,7 @@ _malloc_postfork(void)
 	}
 	prof_postfork_parent(tsd_tsdn(tsd));
 	malloc_mutex_postfork_parent(tsd_tsdn(tsd), &arenas_lock);
+	tcache_postfork_parent(tsd_tsdn(tsd));
 	ctl_postfork_parent(tsd_tsdn(tsd));
 }
 
@@ -2910,6 +2918,7 @@ jemalloc_postfork_child(void)
 	}
 	prof_postfork_child(tsd_tsdn(tsd));
 	malloc_mutex_postfork_child(tsd_tsdn(tsd), &arenas_lock);
+	tcache_postfork_child(tsd_tsdn(tsd));
 	ctl_postfork_child(tsd_tsdn(tsd));
 }
 
diff --git a/jemalloc-4.4.0/src/mb.c b/jemalloc-4.5.0/src/mb.c
similarity index 100%
rename from jemalloc-4.4.0/src/mb.c
rename to jemalloc-4.5.0/src/mb.c
diff --git a/jemalloc-4.4.0/src/mutex.c b/jemalloc-4.5.0/src/mutex.c
similarity index 100%
rename from jemalloc-4.4.0/src/mutex.c
rename to jemalloc-4.5.0/src/mutex.c
diff --git a/jemalloc-4.4.0/src/nstime.c b/jemalloc-4.5.0/src/nstime.c
similarity index 100%
rename from jemalloc-4.4.0/src/nstime.c
rename to jemalloc-4.5.0/src/nstime.c
diff --git a/jemalloc-4.4.0/src/pages.c b/jemalloc-4.5.0/src/pages.c
similarity index 98%
rename from jemalloc-4.4.0/src/pages.c
rename to jemalloc-4.5.0/src/pages.c
index 5f0c966..7698e49 100644
--- a/jemalloc-4.4.0/src/pages.c
+++ b/jemalloc-4.5.0/src/pages.c
@@ -199,7 +199,7 @@ pages_huge(void *addr, size_t size)
 	assert(PAGE_ADDR2BASE(addr) == addr);
 	assert(PAGE_CEILING(size) == size);
 
-#ifdef JEMALLOC_THP
+#ifdef JEMALLOC_HAVE_MADVISE_HUGE
 	return (madvise(addr, size, MADV_HUGEPAGE) != 0);
 #else
 	return (false);
@@ -213,7 +213,7 @@ pages_nohuge(void *addr, size_t size)
 	assert(PAGE_ADDR2BASE(addr) == addr);
 	assert(PAGE_CEILING(size) == size);
 
-#ifdef JEMALLOC_THP
+#ifdef JEMALLOC_HAVE_MADVISE_HUGE
 	return (madvise(addr, size, MADV_NOHUGEPAGE) != 0);
 #else
 	return (false);
diff --git a/jemalloc-4.4.0/src/prng.c b/jemalloc-4.5.0/src/prng.c
similarity index 100%
rename from jemalloc-4.4.0/src/prng.c
rename to jemalloc-4.5.0/src/prng.c
diff --git a/jemalloc-4.4.0/src/prof.c b/jemalloc-4.5.0/src/prof.c
similarity index 100%
rename from jemalloc-4.4.0/src/prof.c
rename to jemalloc-4.5.0/src/prof.c
diff --git a/jemalloc-4.4.0/src/quarantine.c b/jemalloc-4.5.0/src/quarantine.c
similarity index 100%
rename from jemalloc-4.4.0/src/quarantine.c
rename to jemalloc-4.5.0/src/quarantine.c
diff --git a/jemalloc-4.4.0/src/rtree.c b/jemalloc-4.5.0/src/rtree.c
similarity index 100%
rename from jemalloc-4.4.0/src/rtree.c
rename to jemalloc-4.5.0/src/rtree.c
diff --git a/jemalloc-4.4.0/src/spin.c b/jemalloc-4.5.0/src/spin.c
similarity index 100%
rename from jemalloc-4.4.0/src/spin.c
rename to jemalloc-4.5.0/src/spin.c
diff --git a/jemalloc-4.4.0/src/stats.c b/jemalloc-4.5.0/src/stats.c
old mode 100755
new mode 100644
similarity index 95%
rename from jemalloc-4.4.0/src/stats.c
rename to jemalloc-4.5.0/src/stats.c
index 1360f3b..b76afc5
--- a/jemalloc-4.4.0/src/stats.c
+++ b/jemalloc-4.5.0/src/stats.c
@@ -39,7 +39,7 @@ stats_arena_bins_print(void (*write_cb)(void *, const char *), void *cbopaque,
     bool json, bool large, bool huge, unsigned i)
 {
 	size_t page;
-	bool config_tcache, in_gap, in_gap_prev;
+	bool in_gap, in_gap_prev;
 	unsigned nbins, j;
 
 	CTL_GET("arenas.page", &page, size_t);
@@ -49,7 +49,6 @@ stats_arena_bins_print(void (*write_cb)(void *, const char *), void *cbopaque,
 		malloc_cprintf(write_cb, cbopaque,
 		    "\t\t\t\t\"bins\": [\n");
 	} else {
-		CTL_GET("config.tcache", &config_tcache, bool);
 		if (config_tcache) {
 			malloc_cprintf(write_cb, cbopaque,
 			    "bins:           size ind    allocated      nmalloc"
@@ -137,8 +136,16 @@ stats_arena_bins_print(void (*write_cb)(void *, const char *), void *cbopaque,
 			availregs = nregs * curruns;
 			milli = (availregs != 0) ? (1000 * curregs) / availregs
 			    : 1000;
-			assert(milli <= 1000);
-			if (milli < 10) {
+
+			if (milli > 1000) {
+				/*
+				 * Race detected: the counters were read in
+				 * separate mallctl calls and concurrent
+				 * operations happened in between. In this case
+				 * no meaningful utilization can be computed.
+				 */
+				malloc_snprintf(util, sizeof(util), " race");
+			} else if (milli < 10) {
 				malloc_snprintf(util, sizeof(util),
 				    "0.00%zu", milli);
 			} else if (milli < 100) {
@@ -147,8 +154,10 @@ stats_arena_bins_print(void (*write_cb)(void *, const char *), void *cbopaque,
 			} else if (milli < 1000) {
 				malloc_snprintf(util, sizeof(util), "0.%zu",
 				    milli);
-			} else
+			} else {
+				assert(milli == 1000);
 				malloc_snprintf(util, sizeof(util), "1");
+			}
 
 			if (config_tcache) {
 				malloc_cprintf(write_cb, cbopaque,
@@ -536,7 +545,7 @@ stats_arena_print(void (*write_cb)(void *, const char *), void *cbopaque,
 		    "\t\t\t\t\t\"allocated\": %zu\n", metadata_allocated);
 
 		malloc_cprintf(write_cb, cbopaque,
-		    "\t\t\t\t},\n");
+		    "\t\t\t\t}%s\n", (bins || large || huge) ? "," : "");
 	} else {
 		malloc_cprintf(write_cb, cbopaque,
 		    "metadata: mapped: %zu, allocated: %zu\n",
@@ -555,7 +564,7 @@ stats_arena_print(void (*write_cb)(void *, const char *), void *cbopaque,
 
 static void
 stats_general_print(void (*write_cb)(void *, const char *), void *cbopaque,
-    bool json, bool merged, bool unmerged)
+    bool json, bool more)
 {
 	const char *cpv;
 	bool bv;
@@ -741,6 +750,7 @@ stats_general_print(void (*write_cb)(void *, const char *), void *cbopaque,
 	OPT_WRITE_BOOL(xmalloc, ",")
 	OPT_WRITE_BOOL(tcache, ",")
 	OPT_WRITE_SSIZE_T(lg_tcache_max, ",")
+	OPT_WRITE_BOOL(thp, ",")
 	OPT_WRITE_BOOL(prof, ",")
 	OPT_WRITE_CHAR_P(prof_prefix, ",")
 	OPT_WRITE_BOOL_MUTABLE(prof_active, prof.active, ",")
@@ -838,9 +848,11 @@ stats_general_print(void (*write_cb)(void *, const char *), void *cbopaque,
 		malloc_cprintf(write_cb, cbopaque,
 		    "\t\t\t\"nbins\": %u,\n", nbins);
 
-		CTL_GET("arenas.nhbins", &uv, unsigned);
-		malloc_cprintf(write_cb, cbopaque,
-		    "\t\t\t\"nhbins\": %u,\n", uv);
+		if (config_tcache) {
+			CTL_GET("arenas.nhbins", &uv, unsigned);
+			malloc_cprintf(write_cb, cbopaque,
+			    "\t\t\t\"nhbins\": %u,\n", uv);
+		}
 
 		malloc_cprintf(write_cb, cbopaque,
 		    "\t\t\t\"bin\": [\n");
@@ -907,11 +919,11 @@ stats_general_print(void (*write_cb)(void *, const char *), void *cbopaque,
 		    "\t\t\t]\n");
 
 		malloc_cprintf(write_cb, cbopaque,
-		    "\t\t},\n");
+		    "\t\t}%s\n", (config_prof || more) ? "," : "");
 	}
 
 	/* prof. */
-	if (json) {
+	if (config_prof && json) {
 		malloc_cprintf(write_cb, cbopaque,
 		    "\t\t\"prof\": {\n");
 
@@ -937,8 +949,7 @@ stats_general_print(void (*write_cb)(void *, const char *), void *cbopaque,
 		    "\t\t\t\"lg_sample\": %zd\n", ssv);
 
 		malloc_cprintf(write_cb, cbopaque,
-		    "\t\t}%s\n", (config_stats || merged || unmerged) ? "," :
-		    "");
+		    "\t\t}%s\n", more ? "," : "");
 	}
 }
 
@@ -1023,31 +1034,37 @@ stats_print_helper(void (*write_cb)(void *, const char *), void *cbopaque,
 				    narenas, bins, large, huge);
 				if (json) {
 					malloc_cprintf(write_cb, cbopaque,
-					    "\t\t\t}%s\n", (ninitialized > 1) ?
-					    "," : "");
+					    "\t\t\t}%s\n", unmerged ?  "," :
+					    "");
 				}
 			}
 
 			/* Unmerged stats. */
-			for (i = j = 0; i < narenas; i++) {
-				if (initialized[i]) {
-					if (json) {
-						j++;
-						malloc_cprintf(write_cb,
-						    cbopaque,
-						    "\t\t\t\"%u\": {\n", i);
-					} else {
-						malloc_cprintf(write_cb,
-						    cbopaque, "\narenas[%u]:\n",
-						    i);
-					}
-					stats_arena_print(write_cb, cbopaque,
-					    json, i, bins, large, huge);
-					if (json) {
-						malloc_cprintf(write_cb,
-						    cbopaque,
-						    "\t\t\t}%s\n", (j <
-						    ninitialized) ? "," : "");
+			if (unmerged) {
+				for (i = j = 0; i < narenas; i++) {
+					if (initialized[i]) {
+						if (json) {
+							j++;
+							malloc_cprintf(write_cb,
+							    cbopaque,
+							    "\t\t\t\"%u\": {\n",
+							    i);
+						} else {
+							malloc_cprintf(write_cb,
+							    cbopaque,
+							    "\narenas[%u]:\n",
+							    i);
+						}
+						stats_arena_print(write_cb,
+						    cbopaque, json, i, bins,
+						    large, huge);
+						if (json) {
+							malloc_cprintf(write_cb,
+							    cbopaque,
+							    "\t\t\t}%s\n", (j <
+							    ninitialized) ? ","
+							    : "");
+						}
 					}
 				}
 			}
@@ -1069,8 +1086,8 @@ stats_print(void (*write_cb)(void *, const char *), void *cbopaque,
 	size_t u64sz;
 	bool json = false;
 	bool general = true;
-	bool merged = true;
-	bool unmerged = true;
+	bool merged = config_stats;
+	bool unmerged = config_stats;
 	bool bins = true;
 	bool large = true;
 	bool huge = true;
@@ -1137,8 +1154,10 @@ stats_print(void (*write_cb)(void *, const char *), void *cbopaque,
 		    "___ Begin jemalloc statistics ___\n");
 	}
 
-	if (general)
-		stats_general_print(write_cb, cbopaque, json, merged, unmerged);
+	if (general) {
+		bool more = (merged || unmerged);
+		stats_general_print(write_cb, cbopaque, json, more);
+	}
 	if (config_stats) {
 		stats_print_helper(write_cb, cbopaque, json, merged, unmerged,
 		    bins, large, huge);
diff --git a/jemalloc-4.4.0/src/tcache.c b/jemalloc-4.5.0/src/tcache.c
old mode 100755
new mode 100644
similarity index 88%
rename from jemalloc-4.4.0/src/tcache.c
rename to jemalloc-4.5.0/src/tcache.c
index 21540ff..e3b04be
--- a/jemalloc-4.4.0/src/tcache.c
+++ b/jemalloc-4.5.0/src/tcache.c
@@ -21,6 +21,9 @@ static unsigned		tcaches_past;
 /* Head of singly linked list tracking available tcaches elements. */
 static tcaches_t	*tcaches_avail;
 
+/* Protects tcaches{,_past,_avail}. */
+static malloc_mutex_t	tcaches_mtx;
+
 /******************************************************************************/
 
 size_t
@@ -444,29 +447,56 @@ tcache_stats_merge(tsdn_t *tsdn, tcache_t *tcache, arena_t *arena)
 	}
 }
 
+static bool
+tcaches_create_prep(tsd_t *tsd) {
+	bool err;
+
+	malloc_mutex_lock(tsd_tsdn(tsd), &tcaches_mtx);
+
+	if (tcaches == NULL) {
+		tcaches = base_alloc(tsd_tsdn(tsd), sizeof(tcache_t *) *
+		    (MALLOCX_TCACHE_MAX+1));
+		if (tcaches == NULL) {
+			err = true;
+			goto label_return;
+		}
+	}
+
+	if (tcaches_avail == NULL && tcaches_past > MALLOCX_TCACHE_MAX) {
+		err = true;
+		goto label_return;
+	}
+
+	err = false;
+label_return:
+	malloc_mutex_unlock(tsd_tsdn(tsd), &tcaches_mtx);
+	return err;
+}
+
 bool
-tcaches_create(tsd_t *tsd, unsigned *r_ind)
-{
+tcaches_create(tsd_t *tsd, unsigned *r_ind) {
+	bool err;
 	arena_t *arena;
 	tcache_t *tcache;
 	tcaches_t *elm;
 
-	if (tcaches == NULL) {
-		tcaches = base_alloc(tsd_tsdn(tsd), sizeof(tcache_t *) *
-		    (MALLOCX_TCACHE_MAX+1));
-		if (tcaches == NULL)
-			return (true);
+	if (tcaches_create_prep(tsd)) {
+		err = true;
+		goto label_return;
 	}
 
-	if (tcaches_avail == NULL && tcaches_past > MALLOCX_TCACHE_MAX)
-		return (true);
 	arena = arena_ichoose(tsd, NULL);
-	if (unlikely(arena == NULL))
-		return (true);
+	if (unlikely(arena == NULL)) {
+		err = true;
+		goto label_return;
+	}
 	tcache = tcache_create(tsd_tsdn(tsd), arena);
-	if (tcache == NULL)
-		return (true);
+	if (tcache == NULL) {
+		err = true;
+		goto label_return;
+	}
 
+	malloc_mutex_lock(tsd_tsdn(tsd), &tcaches_mtx);
 	if (tcaches_avail != NULL) {
 		elm = tcaches_avail;
 		tcaches_avail = tcaches_avail->next;
@@ -478,41 +508,50 @@ tcaches_create(tsd_t *tsd, unsigned *r_ind)
 		*r_ind = tcaches_past;
 		tcaches_past++;
 	}
+	malloc_mutex_unlock(tsd_tsdn(tsd), &tcaches_mtx);
 
-	return (false);
+	err = false;
+label_return:
+	malloc_mutex_assert_not_owner(tsd_tsdn(tsd), &tcaches_mtx);
+	return err;
 }
 
 static void
-tcaches_elm_flush(tsd_t *tsd, tcaches_t *elm)
-{
+tcaches_elm_flush(tsd_t *tsd, tcaches_t *elm) {
+	malloc_mutex_assert_owner(tsd_tsdn(tsd), &tcaches_mtx);
 
-	if (elm->tcache == NULL)
+	if (elm->tcache == NULL) {
 		return;
+	}
 	tcache_destroy(tsd, elm->tcache);
 	elm->tcache = NULL;
 }
 
 void
-tcaches_flush(tsd_t *tsd, unsigned ind)
-{
-
+tcaches_flush(tsd_t *tsd, unsigned ind) {
+	malloc_mutex_lock(tsd_tsdn(tsd), &tcaches_mtx);
 	tcaches_elm_flush(tsd, &tcaches[ind]);
+	malloc_mutex_unlock(tsd_tsdn(tsd), &tcaches_mtx);
 }
 
 void
-tcaches_destroy(tsd_t *tsd, unsigned ind)
-{
-	tcaches_t *elm = &tcaches[ind];
+tcaches_destroy(tsd_t *tsd, unsigned ind) {
+	tcaches_t *elm;
+
+	malloc_mutex_lock(tsd_tsdn(tsd), &tcaches_mtx);
+	elm = &tcaches[ind];
 	tcaches_elm_flush(tsd, elm);
 	elm->next = tcaches_avail;
 	tcaches_avail = elm;
+	malloc_mutex_unlock(tsd_tsdn(tsd), &tcaches_mtx);
 }
 
 bool
-tcache_boot(tsdn_t *tsdn)
-{
+tcache_boot(tsdn_t *tsdn) {
 	unsigned i;
 
+	cassert(config_tcache);
+
 	/*
 	 * If necessary, clamp opt_lg_tcache_max, now that large_maxclass is
 	 * known.
@@ -524,6 +563,10 @@ tcache_boot(tsdn_t *tsdn)
 	else
 		tcache_maxclass = (ZU(1) << opt_lg_tcache_max);
 
+	if (malloc_mutex_init(&tcaches_mtx, "tcaches", WITNESS_RANK_TCACHES)) {
+		return true;
+	}
+
 	nhbins = size2index(tcache_maxclass) + 1;
 
 	/* Initialize tcache_bin_info. */
@@ -553,3 +596,24 @@ tcache_boot(tsdn_t *tsdn)
 
 	return (false);
 }
+
+void
+tcache_prefork(tsdn_t *tsdn) {
+	if (!config_prof && opt_tcache) {
+		malloc_mutex_prefork(tsdn, &tcaches_mtx);
+	}
+}
+
+void
+tcache_postfork_parent(tsdn_t *tsdn) {
+	if (!config_prof && opt_tcache) {
+		malloc_mutex_postfork_parent(tsdn, &tcaches_mtx);
+	}
+}
+
+void
+tcache_postfork_child(tsdn_t *tsdn) {
+	if (!config_prof && opt_tcache) {
+		malloc_mutex_postfork_child(tsdn, &tcaches_mtx);
+	}
+}
diff --git a/jemalloc-4.4.0/src/ticker.c b/jemalloc-4.5.0/src/ticker.c
similarity index 100%
rename from jemalloc-4.4.0/src/ticker.c
rename to jemalloc-4.5.0/src/ticker.c
diff --git a/jemalloc-4.4.0/src/tsd.c b/jemalloc-4.5.0/src/tsd.c
similarity index 100%
rename from jemalloc-4.4.0/src/tsd.c
rename to jemalloc-4.5.0/src/tsd.c
diff --git a/jemalloc-4.4.0/src/util.c b/jemalloc-4.5.0/src/util.c
old mode 100755
new mode 100644
similarity index 100%
rename from jemalloc-4.4.0/src/util.c
rename to jemalloc-4.5.0/src/util.c
diff --git a/jemalloc-4.4.0/src/valgrind.c b/jemalloc-4.5.0/src/valgrind.c
similarity index 100%
rename from jemalloc-4.4.0/src/valgrind.c
rename to jemalloc-4.5.0/src/valgrind.c
diff --git a/jemalloc-4.4.0/src/witness.c b/jemalloc-4.5.0/src/witness.c
similarity index 84%
rename from jemalloc-4.4.0/src/witness.c
rename to jemalloc-4.5.0/src/witness.c
index 23753f2..c3a65f7 100644
--- a/jemalloc-4.4.0/src/witness.c
+++ b/jemalloc-4.5.0/src/witness.c
@@ -71,15 +71,16 @@ witness_not_owner_error_t *witness_not_owner_error =
 #endif
 
 #ifdef JEMALLOC_JET
-#undef witness_lockless_error
-#define	witness_lockless_error JEMALLOC_N(n_witness_lockless_error)
+#undef witness_depth_error
+#define witness_depth_error JEMALLOC_N(n_witness_depth_error)
 #endif
 void
-witness_lockless_error(const witness_list_t *witnesses)
-{
+witness_depth_error(const witness_list_t *witnesses,
+    witness_rank_t rank_inclusive, unsigned depth) {
 	witness_t *w;
 
-	malloc_printf("<jemalloc>: Should not own any locks:");
+	malloc_printf("<jemalloc>: Should own %u lock%s of rank >= %u:", depth,
+	    (depth != 1) ?  "s" : "", rank_inclusive);
 	ql_foreach(w, witnesses, link) {
 		malloc_printf(" %s(%u)", w->name, w->rank);
 	}
@@ -87,10 +88,9 @@ witness_lockless_error(const witness_list_t *witnesses)
 	abort();
 }
 #ifdef JEMALLOC_JET
-#undef witness_lockless_error
-#define	witness_lockless_error JEMALLOC_N(witness_lockless_error)
-witness_lockless_error_t *witness_lockless_error =
-    JEMALLOC_N(n_witness_lockless_error);
+#undef witness_depth_error
+#define witness_depth_error JEMALLOC_N(witness_depth_error)
+witness_depth_error_t *witness_depth_error = JEMALLOC_N(n_witness_depth_error);
 #endif
 
 void
diff --git a/jemalloc-4.4.0/src/zone.c b/jemalloc-4.5.0/src/zone.c
similarity index 56%
rename from jemalloc-4.4.0/src/zone.c
rename to jemalloc-4.5.0/src/zone.c
index 0571920..6215133 100644
--- a/jemalloc-4.4.0/src/zone.c
+++ b/jemalloc-4.5.0/src/zone.c
@@ -3,6 +3,75 @@
 #  error "This source file is for zones on Darwin (OS X)."
 #endif
 
+/* Definitions of the following structs in malloc/malloc.h might be too old
+ * for the built binary to run on newer versions of OSX. So use the newest
+ * possible version of those structs.
+ */
+typedef struct _malloc_zone_t {
+	void *reserved1;
+	void *reserved2;
+	size_t (*size)(struct _malloc_zone_t *, const void *);
+	void *(*malloc)(struct _malloc_zone_t *, size_t);
+	void *(*calloc)(struct _malloc_zone_t *, size_t, size_t);
+	void *(*valloc)(struct _malloc_zone_t *, size_t);
+	void (*free)(struct _malloc_zone_t *, void *);
+	void *(*realloc)(struct _malloc_zone_t *, void *, size_t);
+	void (*destroy)(struct _malloc_zone_t *);
+	const char *zone_name;
+	unsigned (*batch_malloc)(struct _malloc_zone_t *, size_t, void **, unsigned);
+	void (*batch_free)(struct _malloc_zone_t *, void **, unsigned);
+	struct malloc_introspection_t *introspect;
+	unsigned version;
+	void *(*memalign)(struct _malloc_zone_t *, size_t, size_t);
+	void (*free_definite_size)(struct _malloc_zone_t *, void *, size_t);
+	size_t (*pressure_relief)(struct _malloc_zone_t *, size_t);
+} malloc_zone_t;
+
+typedef struct {
+	vm_address_t address;
+	vm_size_t size;
+} vm_range_t;
+
+typedef struct malloc_statistics_t {
+	unsigned blocks_in_use;
+	size_t size_in_use;
+	size_t max_size_in_use;
+	size_t size_allocated;
+} malloc_statistics_t;
+
+typedef kern_return_t memory_reader_t(task_t, vm_address_t, vm_size_t, void **);
+
+typedef void vm_range_recorder_t(task_t, void *, unsigned type, vm_range_t *, unsigned);
+
+typedef struct malloc_introspection_t {
+	kern_return_t (*enumerator)(task_t, void *, unsigned, vm_address_t, memory_reader_t, vm_range_recorder_t);
+	size_t (*good_size)(malloc_zone_t *, size_t);
+	boolean_t (*check)(malloc_zone_t *);
+	void (*print)(malloc_zone_t *, boolean_t);
+	void (*log)(malloc_zone_t *, void *);
+	void (*force_lock)(malloc_zone_t *);
+	void (*force_unlock)(malloc_zone_t *);
+	void (*statistics)(malloc_zone_t *, malloc_statistics_t *);
+	boolean_t (*zone_locked)(malloc_zone_t *);
+	boolean_t (*enable_discharge_checking)(malloc_zone_t *);
+	boolean_t (*disable_discharge_checking)(malloc_zone_t *);
+	void (*discharge)(malloc_zone_t *, void *);
+#ifdef __BLOCKS__
+	void (*enumerate_discharged_pointers)(malloc_zone_t *, void (^)(void *, void *));
+#else
+	void *enumerate_unavailable_without_blocks;
+#endif
+	void (*reinit_lock)(malloc_zone_t *);
+} malloc_introspection_t;
+
+extern kern_return_t malloc_get_all_zones(task_t, memory_reader_t, vm_address_t **, unsigned *);
+
+extern malloc_zone_t *malloc_default_zone(void);
+
+extern void malloc_zone_register(malloc_zone_t *zone);
+
+extern void malloc_zone_unregister(malloc_zone_t *zone);
+
 /*
  * The malloc_default_purgeable_zone() function is only available on >= 10.6.
  * We need to check whether it is present at runtime, thus the weak_import.
@@ -20,24 +89,35 @@ static struct malloc_introspection_t jemalloc_zone_introspect;
 /******************************************************************************/
 /* Function prototypes for non-inline static functions. */
 
-static size_t	zone_size(malloc_zone_t *zone, void *ptr);
+static size_t	zone_size(malloc_zone_t *zone, const void *ptr);
 static void	*zone_malloc(malloc_zone_t *zone, size_t size);
 static void	*zone_calloc(malloc_zone_t *zone, size_t num, size_t size);
 static void	*zone_valloc(malloc_zone_t *zone, size_t size);
 static void	zone_free(malloc_zone_t *zone, void *ptr);
 static void	*zone_realloc(malloc_zone_t *zone, void *ptr, size_t size);
-#if (JEMALLOC_ZONE_VERSION >= 5)
 static void	*zone_memalign(malloc_zone_t *zone, size_t alignment,
-#endif
-#if (JEMALLOC_ZONE_VERSION >= 6)
     size_t size);
 static void	zone_free_definite_size(malloc_zone_t *zone, void *ptr,
     size_t size);
-#endif
-static void	*zone_destroy(malloc_zone_t *zone);
+static void	zone_destroy(malloc_zone_t *zone);
+static unsigned	zone_batch_malloc(struct _malloc_zone_t *zone, size_t size,
+    void **results, unsigned num_requested);
+static void	zone_batch_free(struct _malloc_zone_t *zone,
+    void **to_be_freed, unsigned num_to_be_freed);
+static size_t	zone_pressure_relief(struct _malloc_zone_t *zone, size_t goal);
 static size_t	zone_good_size(malloc_zone_t *zone, size_t size);
+static kern_return_t	zone_enumerator(task_t task, void *data, unsigned type_mask,
+    vm_address_t zone_address, memory_reader_t reader,
+    vm_range_recorder_t recorder);
+static boolean_t	zone_check(malloc_zone_t *zone);
+static void	zone_print(malloc_zone_t *zone, boolean_t verbose);
+static void	zone_log(malloc_zone_t *zone, void *address);
 static void	zone_force_lock(malloc_zone_t *zone);
 static void	zone_force_unlock(malloc_zone_t *zone);
+static void	zone_statistics(malloc_zone_t *zone,
+    malloc_statistics_t *stats);
+static boolean_t	zone_locked(malloc_zone_t *zone);
+static void	zone_reinit_lock(malloc_zone_t *zone);
 
 /******************************************************************************/
 /*
@@ -45,7 +125,7 @@ static void	zone_force_unlock(malloc_zone_t *zone);
  */
 
 static size_t
-zone_size(malloc_zone_t *zone, void *ptr)
+zone_size(malloc_zone_t *zone, const void *ptr)
 {
 
 	/*
@@ -106,7 +186,6 @@ zone_realloc(malloc_zone_t *zone, void *ptr, size_t size)
 	return (realloc(ptr, size));
 }
 
-#if (JEMALLOC_ZONE_VERSION >= 5)
 static void *
 zone_memalign(malloc_zone_t *zone, size_t alignment, size_t size)
 {
@@ -116,9 +195,7 @@ zone_memalign(malloc_zone_t *zone, size_t alignment, size_t size)
 
 	return (ret);
 }
-#endif
 
-#if (JEMALLOC_ZONE_VERSION >= 6)
 static void
 zone_free_definite_size(malloc_zone_t *zone, void *ptr, size_t size)
 {
@@ -133,15 +210,46 @@ zone_free_definite_size(malloc_zone_t *zone, void *ptr, size_t size)
 
 	free(ptr);
 }
-#endif
 
-static void *
+static void
 zone_destroy(malloc_zone_t *zone)
 {
 
 	/* This function should never be called. */
 	not_reached();
-	return (NULL);
+}
+
+static unsigned
+zone_batch_malloc(struct _malloc_zone_t *zone, size_t size, void **results,
+    unsigned num_requested)
+{
+	unsigned i;
+
+	for (i = 0; i < num_requested; i++) {
+		results[i] = je_malloc(size);
+		if (!results[i])
+			break;
+	}
+
+	return i;
+}
+
+static void
+zone_batch_free(struct _malloc_zone_t *zone, void **to_be_freed,
+    unsigned num_to_be_freed)
+{
+	unsigned i;
+
+	for (i = 0; i < num_to_be_freed; i++) {
+		zone_free(zone, to_be_freed[i]);
+		to_be_freed[i] = NULL;
+	}
+}
+
+static size_t
+zone_pressure_relief(struct _malloc_zone_t *zone, size_t goal)
+{
+	return 0;
 }
 
 static size_t
@@ -153,6 +261,30 @@ zone_good_size(malloc_zone_t *zone, size_t size)
 	return (s2u(size));
 }
 
+static kern_return_t
+zone_enumerator(task_t task, void *data, unsigned type_mask,
+    vm_address_t zone_address, memory_reader_t reader,
+    vm_range_recorder_t recorder)
+{
+	return KERN_SUCCESS;
+}
+
+static boolean_t
+zone_check(malloc_zone_t *zone)
+{
+	return true;
+}
+
+static void
+zone_print(malloc_zone_t *zone, boolean_t verbose)
+{
+}
+
+static void
+zone_log(malloc_zone_t *zone, void *address)
+{
+}
+
 static void
 zone_force_lock(malloc_zone_t *zone)
 {
@@ -176,53 +308,69 @@ zone_force_unlock(malloc_zone_t *zone)
 		jemalloc_postfork_child();
 }
 
+static void
+zone_statistics(malloc_zone_t *zone, malloc_statistics_t *stats)
+{
+	/* We make no effort to actually fill the values */
+	stats->blocks_in_use = 0;
+	stats->size_in_use = 0;
+	stats->max_size_in_use = 0;
+	stats->size_allocated = 0;
+}
+
+static boolean_t
+zone_locked(malloc_zone_t *zone)
+{
+	/* Pretend no lock is being held */
+	return false;
+}
+
+static void
+zone_reinit_lock(malloc_zone_t *zone)
+{
+	/* As of OSX 10.12, this function is only used when force_unlock would
+	 * be used if the zone version were < 9. So just use force_unlock. */
+	zone_force_unlock(zone);
+}
+
 static void
 zone_init(void)
 {
 
-	jemalloc_zone.size = (void *)zone_size;
-	jemalloc_zone.malloc = (void *)zone_malloc;
-	jemalloc_zone.calloc = (void *)zone_calloc;
-	jemalloc_zone.valloc = (void *)zone_valloc;
-	jemalloc_zone.free = (void *)zone_free;
-	jemalloc_zone.realloc = (void *)zone_realloc;
-	jemalloc_zone.destroy = (void *)zone_destroy;
+	jemalloc_zone.size = zone_size;
+	jemalloc_zone.malloc = zone_malloc;
+	jemalloc_zone.calloc = zone_calloc;
+	jemalloc_zone.valloc = zone_valloc;
+	jemalloc_zone.free = zone_free;
+	jemalloc_zone.realloc = zone_realloc;
+	jemalloc_zone.destroy = zone_destroy;
 	jemalloc_zone.zone_name = "jemalloc_zone";
-	jemalloc_zone.batch_malloc = NULL;
-	jemalloc_zone.batch_free = NULL;
+	jemalloc_zone.batch_malloc = zone_batch_malloc;
+	jemalloc_zone.batch_free = zone_batch_free;
 	jemalloc_zone.introspect = &jemalloc_zone_introspect;
-	jemalloc_zone.version = JEMALLOC_ZONE_VERSION;
-#if (JEMALLOC_ZONE_VERSION >= 5)
+	jemalloc_zone.version = 9;
 	jemalloc_zone.memalign = zone_memalign;
-#endif
-#if (JEMALLOC_ZONE_VERSION >= 6)
 	jemalloc_zone.free_definite_size = zone_free_definite_size;
-#endif
-#if (JEMALLOC_ZONE_VERSION >= 8)
-	jemalloc_zone.pressure_relief = NULL;
-#endif
-
-	jemalloc_zone_introspect.enumerator = NULL;
-	jemalloc_zone_introspect.good_size = (void *)zone_good_size;
-	jemalloc_zone_introspect.check = NULL;
-	jemalloc_zone_introspect.print = NULL;
-	jemalloc_zone_introspect.log = NULL;
-	jemalloc_zone_introspect.force_lock = (void *)zone_force_lock;
-	jemalloc_zone_introspect.force_unlock = (void *)zone_force_unlock;
-	jemalloc_zone_introspect.statistics = NULL;
-#if (JEMALLOC_ZONE_VERSION >= 6)
-	jemalloc_zone_introspect.zone_locked = NULL;
-#endif
-#if (JEMALLOC_ZONE_VERSION >= 7)
+	jemalloc_zone.pressure_relief = zone_pressure_relief;
+
+	jemalloc_zone_introspect.enumerator = zone_enumerator;
+	jemalloc_zone_introspect.good_size = zone_good_size;
+	jemalloc_zone_introspect.check = zone_check;
+	jemalloc_zone_introspect.print = zone_print;
+	jemalloc_zone_introspect.log = zone_log;
+	jemalloc_zone_introspect.force_lock = zone_force_lock;
+	jemalloc_zone_introspect.force_unlock = zone_force_unlock;
+	jemalloc_zone_introspect.statistics = zone_statistics;
+	jemalloc_zone_introspect.zone_locked = zone_locked;
 	jemalloc_zone_introspect.enable_discharge_checking = NULL;
 	jemalloc_zone_introspect.disable_discharge_checking = NULL;
 	jemalloc_zone_introspect.discharge = NULL;
-#  ifdef __BLOCKS__
+#ifdef __BLOCKS__
 	jemalloc_zone_introspect.enumerate_discharged_pointers = NULL;
-#  else
+#else
 	jemalloc_zone_introspect.enumerate_unavailable_without_blocks = NULL;
-#  endif
 #endif
+	jemalloc_zone_introspect.reinit_lock = zone_reinit_lock;
 }
 
 static malloc_zone_t *
diff --git a/jemalloc-4.4.0/test/include/test/SFMT-alti.h b/jemalloc-4.5.0/test/include/test/SFMT-alti.h
similarity index 100%
rename from jemalloc-4.4.0/test/include/test/SFMT-alti.h
rename to jemalloc-4.5.0/test/include/test/SFMT-alti.h
diff --git a/jemalloc-4.4.0/test/include/test/SFMT-params.h b/jemalloc-4.5.0/test/include/test/SFMT-params.h
similarity index 100%
rename from jemalloc-4.4.0/test/include/test/SFMT-params.h
rename to jemalloc-4.5.0/test/include/test/SFMT-params.h
diff --git a/jemalloc-4.4.0/test/include/test/SFMT-params11213.h b/jemalloc-4.5.0/test/include/test/SFMT-params11213.h
similarity index 100%
rename from jemalloc-4.4.0/test/include/test/SFMT-params11213.h
rename to jemalloc-4.5.0/test/include/test/SFMT-params11213.h
diff --git a/jemalloc-4.4.0/test/include/test/SFMT-params1279.h b/jemalloc-4.5.0/test/include/test/SFMT-params1279.h
similarity index 100%
rename from jemalloc-4.4.0/test/include/test/SFMT-params1279.h
rename to jemalloc-4.5.0/test/include/test/SFMT-params1279.h
diff --git a/jemalloc-4.4.0/test/include/test/SFMT-params132049.h b/jemalloc-4.5.0/test/include/test/SFMT-params132049.h
similarity index 100%
rename from jemalloc-4.4.0/test/include/test/SFMT-params132049.h
rename to jemalloc-4.5.0/test/include/test/SFMT-params132049.h
diff --git a/jemalloc-4.4.0/test/include/test/SFMT-params19937.h b/jemalloc-4.5.0/test/include/test/SFMT-params19937.h
similarity index 100%
rename from jemalloc-4.4.0/test/include/test/SFMT-params19937.h
rename to jemalloc-4.5.0/test/include/test/SFMT-params19937.h
diff --git a/jemalloc-4.4.0/test/include/test/SFMT-params216091.h b/jemalloc-4.5.0/test/include/test/SFMT-params216091.h
similarity index 100%
rename from jemalloc-4.4.0/test/include/test/SFMT-params216091.h
rename to jemalloc-4.5.0/test/include/test/SFMT-params216091.h
diff --git a/jemalloc-4.4.0/test/include/test/SFMT-params2281.h b/jemalloc-4.5.0/test/include/test/SFMT-params2281.h
similarity index 100%
rename from jemalloc-4.4.0/test/include/test/SFMT-params2281.h
rename to jemalloc-4.5.0/test/include/test/SFMT-params2281.h
diff --git a/jemalloc-4.4.0/test/include/test/SFMT-params4253.h b/jemalloc-4.5.0/test/include/test/SFMT-params4253.h
similarity index 100%
rename from jemalloc-4.4.0/test/include/test/SFMT-params4253.h
rename to jemalloc-4.5.0/test/include/test/SFMT-params4253.h
diff --git a/jemalloc-4.4.0/test/include/test/SFMT-params44497.h b/jemalloc-4.5.0/test/include/test/SFMT-params44497.h
similarity index 100%
rename from jemalloc-4.4.0/test/include/test/SFMT-params44497.h
rename to jemalloc-4.5.0/test/include/test/SFMT-params44497.h
diff --git a/jemalloc-4.4.0/test/include/test/SFMT-params607.h b/jemalloc-4.5.0/test/include/test/SFMT-params607.h
similarity index 100%
rename from jemalloc-4.4.0/test/include/test/SFMT-params607.h
rename to jemalloc-4.5.0/test/include/test/SFMT-params607.h
diff --git a/jemalloc-4.4.0/test/include/test/SFMT-params86243.h b/jemalloc-4.5.0/test/include/test/SFMT-params86243.h
similarity index 100%
rename from jemalloc-4.4.0/test/include/test/SFMT-params86243.h
rename to jemalloc-4.5.0/test/include/test/SFMT-params86243.h
diff --git a/jemalloc-4.4.0/test/include/test/SFMT-sse2.h b/jemalloc-4.5.0/test/include/test/SFMT-sse2.h
similarity index 100%
rename from jemalloc-4.4.0/test/include/test/SFMT-sse2.h
rename to jemalloc-4.5.0/test/include/test/SFMT-sse2.h
diff --git a/jemalloc-4.4.0/test/include/test/SFMT.h b/jemalloc-4.5.0/test/include/test/SFMT.h
similarity index 100%
rename from jemalloc-4.4.0/test/include/test/SFMT.h
rename to jemalloc-4.5.0/test/include/test/SFMT.h
diff --git a/jemalloc-4.4.0/test/include/test/btalloc.h b/jemalloc-4.5.0/test/include/test/btalloc.h
similarity index 100%
rename from jemalloc-4.4.0/test/include/test/btalloc.h
rename to jemalloc-4.5.0/test/include/test/btalloc.h
diff --git a/jemalloc-4.4.0/test/include/test/jemalloc_test.h.in b/jemalloc-4.5.0/test/include/test/jemalloc_test.h.in
similarity index 100%
rename from jemalloc-4.4.0/test/include/test/jemalloc_test.h.in
rename to jemalloc-4.5.0/test/include/test/jemalloc_test.h.in
diff --git a/jemalloc-4.4.0/test/include/test/jemalloc_test_defs.h.in b/jemalloc-4.5.0/test/include/test/jemalloc_test_defs.h.in
similarity index 100%
rename from jemalloc-4.4.0/test/include/test/jemalloc_test_defs.h.in
rename to jemalloc-4.5.0/test/include/test/jemalloc_test_defs.h.in
diff --git a/jemalloc-4.4.0/test/include/test/math.h b/jemalloc-4.5.0/test/include/test/math.h
similarity index 100%
rename from jemalloc-4.4.0/test/include/test/math.h
rename to jemalloc-4.5.0/test/include/test/math.h
diff --git a/jemalloc-4.4.0/test/include/test/mq.h b/jemalloc-4.5.0/test/include/test/mq.h
similarity index 100%
rename from jemalloc-4.4.0/test/include/test/mq.h
rename to jemalloc-4.5.0/test/include/test/mq.h
diff --git a/jemalloc-4.4.0/test/include/test/mtx.h b/jemalloc-4.5.0/test/include/test/mtx.h
similarity index 100%
rename from jemalloc-4.4.0/test/include/test/mtx.h
rename to jemalloc-4.5.0/test/include/test/mtx.h
diff --git a/jemalloc-4.4.0/test/include/test/test.h b/jemalloc-4.5.0/test/include/test/test.h
similarity index 100%
rename from jemalloc-4.4.0/test/include/test/test.h
rename to jemalloc-4.5.0/test/include/test/test.h
diff --git a/jemalloc-4.4.0/test/include/test/thd.h b/jemalloc-4.5.0/test/include/test/thd.h
similarity index 100%
rename from jemalloc-4.4.0/test/include/test/thd.h
rename to jemalloc-4.5.0/test/include/test/thd.h
diff --git a/jemalloc-4.4.0/test/include/test/timer.h b/jemalloc-4.5.0/test/include/test/timer.h
similarity index 100%
rename from jemalloc-4.4.0/test/include/test/timer.h
rename to jemalloc-4.5.0/test/include/test/timer.h
diff --git a/jemalloc-4.4.0/test/integration/MALLOCX_ARENA.c b/jemalloc-4.5.0/test/integration/MALLOCX_ARENA.c
old mode 100755
new mode 100644
similarity index 100%
rename from jemalloc-4.4.0/test/integration/MALLOCX_ARENA.c
rename to jemalloc-4.5.0/test/integration/MALLOCX_ARENA.c
diff --git a/jemalloc-4.4.0/test/integration/aligned_alloc.c b/jemalloc-4.5.0/test/integration/aligned_alloc.c
similarity index 100%
rename from jemalloc-4.4.0/test/integration/aligned_alloc.c
rename to jemalloc-4.5.0/test/integration/aligned_alloc.c
diff --git a/jemalloc-4.4.0/test/integration/allocated.c b/jemalloc-4.5.0/test/integration/allocated.c
old mode 100755
new mode 100644
similarity index 100%
rename from jemalloc-4.4.0/test/integration/allocated.c
rename to jemalloc-4.5.0/test/integration/allocated.c
diff --git a/jemalloc-4.4.0/test/integration/chunk.c b/jemalloc-4.5.0/test/integration/chunk.c
similarity index 99%
rename from jemalloc-4.4.0/test/integration/chunk.c
rename to jemalloc-4.5.0/test/integration/chunk.c
index 94cf002..997567a 100644
--- a/jemalloc-4.4.0/test/integration/chunk.c
+++ b/jemalloc-4.5.0/test/integration/chunk.c
@@ -1,9 +1,5 @@
 #include "test/jemalloc_test.h"
 
-#ifdef JEMALLOC_FILL
-const char *malloc_conf = "junk:false";
-#endif
-
 static chunk_hooks_t orig_hooks;
 static chunk_hooks_t old_hooks;
 
diff --git a/jemalloc-4.5.0/test/integration/chunk.sh b/jemalloc-4.5.0/test/integration/chunk.sh
new file mode 100644
index 0000000..0cc2187
--- /dev/null
+++ b/jemalloc-4.5.0/test/integration/chunk.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+if [ "x${enable_fill}" = "x1" ] ; then
+  export MALLOC_CONF="junk:false"
+fi
diff --git a/jemalloc-4.4.0/test/integration/mallocx.c b/jemalloc-4.5.0/test/integration/mallocx.c
old mode 100755
new mode 100644
similarity index 98%
rename from jemalloc-4.4.0/test/integration/mallocx.c
rename to jemalloc-4.5.0/test/integration/mallocx.c
index d709eb3..5a9058d
--- a/jemalloc-4.4.0/test/integration/mallocx.c
+++ b/jemalloc-4.5.0/test/integration/mallocx.c
@@ -1,9 +1,5 @@
 #include "test/jemalloc_test.h"
 
-#ifdef JEMALLOC_FILL
-const char *malloc_conf = "junk:false";
-#endif
-
 static unsigned
 get_nsizes_impl(const char *cmd)
 {
diff --git a/jemalloc-4.5.0/test/integration/mallocx.sh b/jemalloc-4.5.0/test/integration/mallocx.sh
new file mode 100644
index 0000000..0cc2187
--- /dev/null
+++ b/jemalloc-4.5.0/test/integration/mallocx.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+if [ "x${enable_fill}" = "x1" ] ; then
+  export MALLOC_CONF="junk:false"
+fi
diff --git a/jemalloc-4.4.0/test/integration/overflow.c b/jemalloc-4.5.0/test/integration/overflow.c
old mode 100755
new mode 100644
similarity index 100%
rename from jemalloc-4.4.0/test/integration/overflow.c
rename to jemalloc-4.5.0/test/integration/overflow.c
diff --git a/jemalloc-4.4.0/test/integration/posix_memalign.c b/jemalloc-4.5.0/test/integration/posix_memalign.c
similarity index 100%
rename from jemalloc-4.4.0/test/integration/posix_memalign.c
rename to jemalloc-4.5.0/test/integration/posix_memalign.c
diff --git a/jemalloc-4.4.0/test/integration/rallocx.c b/jemalloc-4.5.0/test/integration/rallocx.c
old mode 100755
new mode 100644
similarity index 100%
rename from jemalloc-4.4.0/test/integration/rallocx.c
rename to jemalloc-4.5.0/test/integration/rallocx.c
diff --git a/jemalloc-4.4.0/test/integration/sdallocx.c b/jemalloc-4.5.0/test/integration/sdallocx.c
similarity index 100%
rename from jemalloc-4.4.0/test/integration/sdallocx.c
rename to jemalloc-4.5.0/test/integration/sdallocx.c
diff --git a/jemalloc-4.4.0/test/integration/thread_arena.c b/jemalloc-4.5.0/test/integration/thread_arena.c
old mode 100755
new mode 100644
similarity index 100%
rename from jemalloc-4.4.0/test/integration/thread_arena.c
rename to jemalloc-4.5.0/test/integration/thread_arena.c
diff --git a/jemalloc-4.4.0/test/integration/thread_tcache_enabled.c b/jemalloc-4.5.0/test/integration/thread_tcache_enabled.c
old mode 100755
new mode 100644
similarity index 100%
rename from jemalloc-4.4.0/test/integration/thread_tcache_enabled.c
rename to jemalloc-4.5.0/test/integration/thread_tcache_enabled.c
diff --git a/jemalloc-4.4.0/test/integration/xallocx.c b/jemalloc-4.5.0/test/integration/xallocx.c
old mode 100755
new mode 100644
similarity index 99%
rename from jemalloc-4.4.0/test/integration/xallocx.c
rename to jemalloc-4.5.0/test/integration/xallocx.c
index 67e0a0e..2517a81
--- a/jemalloc-4.4.0/test/integration/xallocx.c
+++ b/jemalloc-4.5.0/test/integration/xallocx.c
@@ -1,9 +1,5 @@
 #include "test/jemalloc_test.h"
 
-#ifdef JEMALLOC_FILL
-const char *malloc_conf = "junk:false";
-#endif
-
 /*
  * Use a separate arena for xallocx() extension/contraction tests so that
  * internal allocation e.g. by heap profiling can't interpose allocations where
diff --git a/jemalloc-4.5.0/test/integration/xallocx.sh b/jemalloc-4.5.0/test/integration/xallocx.sh
new file mode 100644
index 0000000..0cc2187
--- /dev/null
+++ b/jemalloc-4.5.0/test/integration/xallocx.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+if [ "x${enable_fill}" = "x1" ] ; then
+  export MALLOC_CONF="junk:false"
+fi
diff --git a/jemalloc-4.4.0/test/src/SFMT.c b/jemalloc-4.5.0/test/src/SFMT.c
similarity index 100%
rename from jemalloc-4.4.0/test/src/SFMT.c
rename to jemalloc-4.5.0/test/src/SFMT.c
diff --git a/jemalloc-4.4.0/test/src/btalloc.c b/jemalloc-4.5.0/test/src/btalloc.c
similarity index 100%
rename from jemalloc-4.4.0/test/src/btalloc.c
rename to jemalloc-4.5.0/test/src/btalloc.c
diff --git a/jemalloc-4.4.0/test/src/btalloc_0.c b/jemalloc-4.5.0/test/src/btalloc_0.c
similarity index 100%
rename from jemalloc-4.4.0/test/src/btalloc_0.c
rename to jemalloc-4.5.0/test/src/btalloc_0.c
diff --git a/jemalloc-4.4.0/test/src/btalloc_1.c b/jemalloc-4.5.0/test/src/btalloc_1.c
similarity index 100%
rename from jemalloc-4.4.0/test/src/btalloc_1.c
rename to jemalloc-4.5.0/test/src/btalloc_1.c
diff --git a/jemalloc-4.4.0/test/src/math.c b/jemalloc-4.5.0/test/src/math.c
similarity index 100%
rename from jemalloc-4.4.0/test/src/math.c
rename to jemalloc-4.5.0/test/src/math.c
diff --git a/jemalloc-4.4.0/test/src/mq.c b/jemalloc-4.5.0/test/src/mq.c
similarity index 100%
rename from jemalloc-4.4.0/test/src/mq.c
rename to jemalloc-4.5.0/test/src/mq.c
diff --git a/jemalloc-4.4.0/test/src/mtx.c b/jemalloc-4.5.0/test/src/mtx.c
similarity index 100%
rename from jemalloc-4.4.0/test/src/mtx.c
rename to jemalloc-4.5.0/test/src/mtx.c
diff --git a/jemalloc-4.4.0/test/src/test.c b/jemalloc-4.5.0/test/src/test.c
similarity index 100%
rename from jemalloc-4.4.0/test/src/test.c
rename to jemalloc-4.5.0/test/src/test.c
diff --git a/jemalloc-4.4.0/test/src/thd.c b/jemalloc-4.5.0/test/src/thd.c
similarity index 100%
rename from jemalloc-4.4.0/test/src/thd.c
rename to jemalloc-4.5.0/test/src/thd.c
diff --git a/jemalloc-4.4.0/test/src/timer.c b/jemalloc-4.5.0/test/src/timer.c
similarity index 100%
rename from jemalloc-4.4.0/test/src/timer.c
rename to jemalloc-4.5.0/test/src/timer.c
diff --git a/jemalloc-4.4.0/test/stress/microbench.c b/jemalloc-4.5.0/test/stress/microbench.c
similarity index 100%
rename from jemalloc-4.4.0/test/stress/microbench.c
rename to jemalloc-4.5.0/test/stress/microbench.c
diff --git a/jemalloc-4.5.0/test/test.sh.in b/jemalloc-4.5.0/test/test.sh.in
new file mode 100644
index 0000000..f0f0f97
--- /dev/null
+++ b/jemalloc-4.5.0/test/test.sh.in
@@ -0,0 +1,80 @@
+#!/bin/sh
+
+case @abi@ in
+  macho)
+    export DYLD_FALLBACK_LIBRARY_PATH="@objroot@lib"
+    ;;
+  pecoff)
+    export PATH="${PATH}:@objroot@lib"
+    ;;
+  *)
+    ;;
+esac
+
+# Make a copy of the @JEMALLOC_CPREFIX@MALLOC_CONF passed in to this script, so
+# it can be repeatedly concatenated with per test settings.
+export MALLOC_CONF_ALL=${@JEMALLOC_CPREFIX@MALLOC_CONF}
+# Concatenate the individual test's MALLOC_CONF and MALLOC_CONF_ALL.
+export_malloc_conf() {
+  if [ "x${MALLOC_CONF}" != "x" -a "x${MALLOC_CONF_ALL}" != "x" ] ; then
+    export @JEMALLOC_CPREFIX@MALLOC_CONF="${MALLOC_CONF},${MALLOC_CONF_ALL}"
+  else
+    export @JEMALLOC_CPREFIX@MALLOC_CONF="${MALLOC_CONF}${MALLOC_CONF_ALL}"
+  fi
+}
+
+# Corresponds to test_status_t.
+pass_code=0
+skip_code=1
+fail_code=2
+
+pass_count=0
+skip_count=0
+fail_count=0
+for t in $@; do
+  if [ $pass_count -ne 0 -o $skip_count -ne 0 -o $fail_count != 0 ] ; then
+    echo
+  fi
+  echo "=== ${t} ==="
+  if [ -e "@srcroot@${t}.sh" ] ; then
+    # Source the shell script corresponding to the test in a subshell and
+    # execute the test.  This allows the shell script to set MALLOC_CONF, which
+    # is then used to set @JEMALLOC_CPREFIX@MALLOC_CONF (thus allowing the
+    # per test shell script to ignore the @JEMALLOC_CPREFIX@ detail).
+    $(enable_fill=@enable_fill@ \
+      enable_prof=@enable_prof@ \
+      enable_tcache=@enable_tcache@ \
+      . @srcroot@${t}.sh && \
+      export_malloc_conf && \
+      ${t}@exe@ @abs_srcroot@ @abs_objroot@)
+  else
+    $(export MALLOC_CONF= && \
+      export_malloc_conf &&
+      ${t}@exe@ @abs_srcroot@ @abs_objroot@)
+  fi
+  result_code=$?
+  case ${result_code} in
+    ${pass_code})
+      pass_count=$((pass_count+1))
+      ;;
+    ${skip_code})
+      skip_count=$((skip_count+1))
+      ;;
+    ${fail_code})
+      fail_count=$((fail_count+1))
+      ;;
+    *)
+      echo "Test harness error" 1>&2
+      exit 1
+  esac
+done
+
+total_count=`expr ${pass_count} + ${skip_count} + ${fail_count}`
+echo
+echo "Test suite summary: pass: ${pass_count}/${total_count}, skip: ${skip_count}/${total_count}, fail: ${fail_count}/${total_count}"
+
+if [ ${fail_count} -eq 0 ] ; then
+  exit 0
+else
+  exit 1
+fi
diff --git a/jemalloc-4.4.0/test/unit/SFMT.c b/jemalloc-4.5.0/test/unit/SFMT.c
similarity index 100%
rename from jemalloc-4.4.0/test/unit/SFMT.c
rename to jemalloc-4.5.0/test/unit/SFMT.c
diff --git a/jemalloc-4.4.0/test/unit/a0.c b/jemalloc-4.5.0/test/unit/a0.c
similarity index 100%
rename from jemalloc-4.4.0/test/unit/a0.c
rename to jemalloc-4.5.0/test/unit/a0.c
diff --git a/jemalloc-4.4.0/test/unit/arena_reset.c b/jemalloc-4.5.0/test/unit/arena_reset.c
old mode 100755
new mode 100644
similarity index 97%
rename from jemalloc-4.4.0/test/unit/arena_reset.c
rename to jemalloc-4.5.0/test/unit/arena_reset.c
index adf9baa..ec1c214
--- a/jemalloc-4.4.0/test/unit/arena_reset.c
+++ b/jemalloc-4.5.0/test/unit/arena_reset.c
@@ -1,9 +1,5 @@
 #include "test/jemalloc_test.h"
 
-#ifdef JEMALLOC_PROF
-const char *malloc_conf = "prof:true,lg_prof_sample:0";
-#endif
-
 static unsigned
 get_nsizes_impl(const char *cmd)
 {
diff --git a/jemalloc-4.5.0/test/unit/arena_reset.sh b/jemalloc-4.5.0/test/unit/arena_reset.sh
new file mode 100644
index 0000000..8fcc7d8
--- /dev/null
+++ b/jemalloc-4.5.0/test/unit/arena_reset.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+if [ "x${enable_prof}" = "x1" ] ; then
+  export MALLOC_CONF="prof:true,lg_prof_sample:0"
+fi
diff --git a/jemalloc-4.4.0/test/unit/atomic.c b/jemalloc-4.5.0/test/unit/atomic.c
similarity index 100%
rename from jemalloc-4.4.0/test/unit/atomic.c
rename to jemalloc-4.5.0/test/unit/atomic.c
diff --git a/jemalloc-4.4.0/test/unit/bitmap.c b/jemalloc-4.5.0/test/unit/bitmap.c
similarity index 100%
rename from jemalloc-4.4.0/test/unit/bitmap.c
rename to jemalloc-4.5.0/test/unit/bitmap.c
diff --git a/jemalloc-4.4.0/test/unit/ckh.c b/jemalloc-4.5.0/test/unit/ckh.c
similarity index 100%
rename from jemalloc-4.4.0/test/unit/ckh.c
rename to jemalloc-4.5.0/test/unit/ckh.c
diff --git a/jemalloc-4.4.0/test/unit/decay.c b/jemalloc-4.5.0/test/unit/decay.c
old mode 100755
new mode 100644
similarity index 99%
rename from jemalloc-4.4.0/test/unit/decay.c
rename to jemalloc-4.5.0/test/unit/decay.c
index 5af8f80..2d8d69d
--- a/jemalloc-4.4.0/test/unit/decay.c
+++ b/jemalloc-4.5.0/test/unit/decay.c
@@ -1,7 +1,5 @@
 #include "test/jemalloc_test.h"
 
-const char *malloc_conf = "purge:decay,decay_time:1";
-
 static nstime_monotonic_t *nstime_monotonic_orig;
 static nstime_update_t *nstime_update_orig;
 
diff --git a/jemalloc-4.5.0/test/unit/decay.sh b/jemalloc-4.5.0/test/unit/decay.sh
new file mode 100644
index 0000000..7b8f470
--- /dev/null
+++ b/jemalloc-4.5.0/test/unit/decay.sh
@@ -0,0 +1,3 @@
+#!/bin/sh
+
+export MALLOC_CONF="purge:decay,decay_time:1"
diff --git a/jemalloc-4.5.0/test/unit/extent_quantize.c b/jemalloc-4.5.0/test/unit/extent_quantize.c
new file mode 100644
index 0000000..d2eb6d7
--- /dev/null
+++ b/jemalloc-4.5.0/test/unit/extent_quantize.c
@@ -0,0 +1,98 @@
+#include "test/jemalloc_test.h"
+
+TEST_BEGIN(test_huge_extent_size) {
+	unsigned nhchunks, i;
+	size_t sz, extent_size_prev, ceil_prev;
+	size_t mib[4];
+	size_t miblen = sizeof(mib) / sizeof(size_t);
+
+	/*
+	 * Iterate over all huge size classes, get their extent sizes, and
+	 * verify that the quantized size is the same as the extent size.
+	 */
+
+	sz = sizeof(unsigned);
+	assert_d_eq(mallctl("arenas.nhchunks", (void *)&nhchunks, &sz, NULL,
+	    0), 0, "Unexpected mallctl failure");
+
+	assert_d_eq(mallctlnametomib("arenas.hchunk.0.size", mib, &miblen), 0,
+	    "Unexpected mallctlnametomib failure");
+	for (i = 0; i < nhchunks; i++) {
+		size_t extent_size, floor, ceil;
+
+
+		mib[2] = i;
+		sz = sizeof(size_t);
+		assert_d_eq(mallctlbymib(mib, miblen, (void *)&extent_size,
+		    &sz, NULL, 0), 0, "Unexpected mallctlbymib failure");
+		floor = extent_size_quantize_floor(extent_size);
+		ceil = extent_size_quantize_ceil(extent_size);
+
+		assert_zu_eq(extent_size, floor,
+		    "Extent quantization should be a no-op for precise size "
+		    "(extent_size=%zu)", extent_size);
+		assert_zu_eq(extent_size, ceil,
+		    "Extent quantization should be a no-op for precise size "
+		    "(extent_size=%zu)", extent_size);
+
+		if (i > 0) {
+			assert_zu_eq(extent_size_prev,
+			    extent_size_quantize_floor(extent_size - PAGE),
+			    "Floor should be a precise size");
+			if (extent_size_prev < ceil_prev) {
+				assert_zu_eq(ceil_prev, extent_size,
+				    "Ceiling should be a precise size "
+				    "(extent_size_prev=%zu, ceil_prev=%zu, "
+				    "extent_size=%zu)", extent_size_prev,
+				    ceil_prev, extent_size);
+			}
+		}
+		if (i + 1 < nhchunks) {
+			extent_size_prev = floor;
+			ceil_prev = extent_size_quantize_ceil(extent_size +
+			    PAGE);
+		}
+	}
+}
+TEST_END
+
+TEST_BEGIN(test_monotonic) {
+#define SZ_MAX	ZU(4 * 1024 * 1024)
+	unsigned i;
+	size_t floor_prev, ceil_prev;
+
+	floor_prev = 0;
+	ceil_prev = 0;
+	for (i = 1; i <= SZ_MAX >> LG_PAGE; i++) {
+		size_t extent_size, floor, ceil;
+
+		extent_size = i << LG_PAGE;
+		floor = extent_size_quantize_floor(extent_size);
+		ceil = extent_size_quantize_ceil(extent_size);
+
+		assert_zu_le(floor, extent_size,
+		    "Floor should be <= (floor=%zu, extent_size=%zu, ceil=%zu)",
+		    floor, extent_size, ceil);
+		assert_zu_ge(ceil, extent_size,
+		    "Ceiling should be >= (floor=%zu, extent_size=%zu, "
+		    "ceil=%zu)", floor, extent_size, ceil);
+
+		assert_zu_le(floor_prev, floor, "Floor should be monotonic "
+		    "(floor_prev=%zu, floor=%zu, extent_size=%zu, ceil=%zu)",
+		    floor_prev, floor, extent_size, ceil);
+		assert_zu_le(ceil_prev, ceil, "Ceiling should be monotonic "
+		    "(floor=%zu, extent_size=%zu, ceil_prev=%zu, ceil=%zu)",
+		    floor, extent_size, ceil_prev, ceil);
+
+		floor_prev = floor;
+		ceil_prev = ceil;
+	}
+}
+TEST_END
+
+int
+main(void) {
+	return test(
+	    test_huge_extent_size,
+	    test_monotonic);
+}
diff --git a/jemalloc-4.4.0/test/unit/fork.c b/jemalloc-4.5.0/test/unit/fork.c
similarity index 100%
rename from jemalloc-4.4.0/test/unit/fork.c
rename to jemalloc-4.5.0/test/unit/fork.c
diff --git a/jemalloc-4.4.0/test/unit/hash.c b/jemalloc-4.5.0/test/unit/hash.c
similarity index 100%
rename from jemalloc-4.4.0/test/unit/hash.c
rename to jemalloc-4.5.0/test/unit/hash.c
diff --git a/jemalloc-4.4.0/test/unit/junk.c b/jemalloc-4.5.0/test/unit/junk.c
similarity index 96%
rename from jemalloc-4.4.0/test/unit/junk.c
rename to jemalloc-4.5.0/test/unit/junk.c
index 460bd52..bbd83fb 100644
--- a/jemalloc-4.4.0/test/unit/junk.c
+++ b/jemalloc-4.5.0/test/unit/junk.c
@@ -1,13 +1,5 @@
 #include "test/jemalloc_test.h"
 
-#ifdef JEMALLOC_FILL
-#  ifndef JEMALLOC_TEST_JUNK_OPT
-#    define JEMALLOC_TEST_JUNK_OPT "junk:true"
-#  endif
-const char *malloc_conf =
-    "abort:false,zero:false,redzone:true,quarantine:0," JEMALLOC_TEST_JUNK_OPT;
-#endif
-
 static arena_dalloc_junk_small_t *arena_dalloc_junk_small_orig;
 static arena_dalloc_junk_large_t *arena_dalloc_junk_large_orig;
 static huge_dalloc_junk_t *huge_dalloc_junk_orig;
diff --git a/jemalloc-4.5.0/test/unit/junk.sh b/jemalloc-4.5.0/test/unit/junk.sh
new file mode 100644
index 0000000..e19c313
--- /dev/null
+++ b/jemalloc-4.5.0/test/unit/junk.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+if [ "x${enable_fill}" = "x1" ] ; then
+  export MALLOC_CONF="abort:false,zero:false,redzone:true,quarantine:0,junk:true"
+fi
diff --git a/jemalloc-4.5.0/test/unit/junk_alloc.c b/jemalloc-4.5.0/test/unit/junk_alloc.c
new file mode 100644
index 0000000..a442a0c
--- /dev/null
+++ b/jemalloc-4.5.0/test/unit/junk_alloc.c
@@ -0,0 +1 @@
+#include "junk.c"
diff --git a/jemalloc-4.5.0/test/unit/junk_alloc.sh b/jemalloc-4.5.0/test/unit/junk_alloc.sh
new file mode 100644
index 0000000..984387d
--- /dev/null
+++ b/jemalloc-4.5.0/test/unit/junk_alloc.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+if [ "x${enable_fill}" = "x1" ] ; then
+  export MALLOC_CONF="abort:false,zero:false,redzone:true,quarantine:0,junk:alloc"
+fi
diff --git a/jemalloc-4.5.0/test/unit/junk_free.c b/jemalloc-4.5.0/test/unit/junk_free.c
new file mode 100644
index 0000000..a442a0c
--- /dev/null
+++ b/jemalloc-4.5.0/test/unit/junk_free.c
@@ -0,0 +1 @@
+#include "junk.c"
diff --git a/jemalloc-4.5.0/test/unit/junk_free.sh b/jemalloc-4.5.0/test/unit/junk_free.sh
new file mode 100644
index 0000000..a5c21a5
--- /dev/null
+++ b/jemalloc-4.5.0/test/unit/junk_free.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+if [ "x${enable_fill}" = "x1" ] ; then
+  export MALLOC_CONF="abort:false,zero:false,redzone:true,quarantine:0,junk:free"
+fi
diff --git a/jemalloc-4.5.0/test/unit/lg_chunk.c b/jemalloc-4.5.0/test/unit/lg_chunk.c
new file mode 100644
index 0000000..d4f77b7
--- /dev/null
+++ b/jemalloc-4.5.0/test/unit/lg_chunk.c
@@ -0,0 +1,19 @@
+#include "test/jemalloc_test.h"
+
+TEST_BEGIN(test_lg_chunk_clamp)
+{
+	void *p;
+
+	p = mallocx(1, 0);
+	assert_ptr_not_null(p, "Unexpected mallocx() failure");
+	dallocx(p, 0);
+}
+TEST_END
+
+int
+main(void)
+{
+
+	return (test(
+	    test_lg_chunk_clamp));
+}
diff --git a/jemalloc-4.5.0/test/unit/lg_chunk.sh b/jemalloc-4.5.0/test/unit/lg_chunk.sh
new file mode 100644
index 0000000..103eef1
--- /dev/null
+++ b/jemalloc-4.5.0/test/unit/lg_chunk.sh
@@ -0,0 +1,6 @@
+#!/bin/sh
+
+# Make sure that opt.lg_chunk clamping is sufficient.  In practice, this test
+# program will fail a debug assertion during initialization and abort (rather
+# than the test soft-failing) if clamping is insufficient.
+export MALLOC_CONF="lg_chunk:0"
diff --git a/jemalloc-4.4.0/test/unit/mallctl.c b/jemalloc-4.5.0/test/unit/mallctl.c
old mode 100755
new mode 100644
similarity index 99%
rename from jemalloc-4.4.0/test/unit/mallctl.c
rename to jemalloc-4.5.0/test/unit/mallctl.c
index 2353c92..3d1a740
--- a/jemalloc-4.4.0/test/unit/mallctl.c
+++ b/jemalloc-4.5.0/test/unit/mallctl.c
@@ -142,6 +142,7 @@ TEST_BEGIN(test_mallctl_config)
 	TEST_MALLCTL_CONFIG(prof_libunwind, bool);
 	TEST_MALLCTL_CONFIG(stats, bool);
 	TEST_MALLCTL_CONFIG(tcache, bool);
+	TEST_MALLCTL_CONFIG(thp, bool);
 	TEST_MALLCTL_CONFIG(tls, bool);
 	TEST_MALLCTL_CONFIG(utrace, bool);
 	TEST_MALLCTL_CONFIG(valgrind, bool);
@@ -182,6 +183,7 @@ TEST_BEGIN(test_mallctl_opt)
 	TEST_MALLCTL_OPT(bool, xmalloc, xmalloc);
 	TEST_MALLCTL_OPT(bool, tcache, tcache);
 	TEST_MALLCTL_OPT(size_t, lg_tcache_max, tcache);
+	TEST_MALLCTL_OPT(bool, thp, thp);
 	TEST_MALLCTL_OPT(bool, prof, prof);
 	TEST_MALLCTL_OPT(const char *, prof_prefix, prof);
 	TEST_MALLCTL_OPT(bool, prof_active, prof);
diff --git a/jemalloc-4.4.0/test/unit/math.c b/jemalloc-4.5.0/test/unit/math.c
similarity index 100%
rename from jemalloc-4.4.0/test/unit/math.c
rename to jemalloc-4.5.0/test/unit/math.c
diff --git a/jemalloc-4.4.0/test/unit/mq.c b/jemalloc-4.5.0/test/unit/mq.c
similarity index 100%
rename from jemalloc-4.4.0/test/unit/mq.c
rename to jemalloc-4.5.0/test/unit/mq.c
diff --git a/jemalloc-4.4.0/test/unit/mtx.c b/jemalloc-4.5.0/test/unit/mtx.c
similarity index 100%
rename from jemalloc-4.4.0/test/unit/mtx.c
rename to jemalloc-4.5.0/test/unit/mtx.c
diff --git a/jemalloc-4.4.0/test/unit/nstime.c b/jemalloc-4.5.0/test/unit/nstime.c
similarity index 100%
rename from jemalloc-4.4.0/test/unit/nstime.c
rename to jemalloc-4.5.0/test/unit/nstime.c
diff --git a/jemalloc-4.4.0/test/unit/pack.c b/jemalloc-4.5.0/test/unit/pack.c
similarity index 95%
rename from jemalloc-4.4.0/test/unit/pack.c
rename to jemalloc-4.5.0/test/unit/pack.c
index 0b6ffcd..991faa6 100644
--- a/jemalloc-4.4.0/test/unit/pack.c
+++ b/jemalloc-4.5.0/test/unit/pack.c
@@ -1,13 +1,5 @@
 #include "test/jemalloc_test.h"
 
-const char *malloc_conf =
-    /* Use smallest possible chunk size. */
-    "lg_chunk:0"
-    /* Immediately purge to minimize fragmentation. */
-    ",lg_dirty_mult:-1"
-    ",decay_time:-1"
-    ;
-
 /*
  * Size class that is a divisor of the page size, ideally 4+ regions per run.
  */
diff --git a/jemalloc-4.5.0/test/unit/pack.sh b/jemalloc-4.5.0/test/unit/pack.sh
new file mode 100644
index 0000000..a58151d
--- /dev/null
+++ b/jemalloc-4.5.0/test/unit/pack.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+# Use smallest possible chunk size.  Immediately purge to minimize
+# fragmentation.
+export MALLOC_CONF="lg_chunk:0,lg_dirty_mult:-1,decay_time:-1"
diff --git a/jemalloc-4.4.0/test/unit/pages.c b/jemalloc-4.5.0/test/unit/pages.c
similarity index 100%
rename from jemalloc-4.4.0/test/unit/pages.c
rename to jemalloc-4.5.0/test/unit/pages.c
diff --git a/jemalloc-4.4.0/test/unit/ph.c b/jemalloc-4.5.0/test/unit/ph.c
similarity index 100%
rename from jemalloc-4.4.0/test/unit/ph.c
rename to jemalloc-4.5.0/test/unit/ph.c
diff --git a/jemalloc-4.4.0/test/unit/prng.c b/jemalloc-4.5.0/test/unit/prng.c
similarity index 100%
rename from jemalloc-4.4.0/test/unit/prng.c
rename to jemalloc-4.5.0/test/unit/prng.c
diff --git a/jemalloc-4.4.0/test/unit/prof_accum.c b/jemalloc-4.5.0/test/unit/prof_accum.c
old mode 100755
new mode 100644
similarity index 93%
rename from jemalloc-4.4.0/test/unit/prof_accum.c
rename to jemalloc-4.5.0/test/unit/prof_accum.c
index d941b5b..031f083
--- a/jemalloc-4.4.0/test/unit/prof_accum.c
+++ b/jemalloc-4.5.0/test/unit/prof_accum.c
@@ -5,11 +5,6 @@
 #define	DUMP_INTERVAL		1
 #define	BT_COUNT_CHECK_INTERVAL	5
 
-#ifdef JEMALLOC_PROF
-const char *malloc_conf =
-    "prof:true,prof_accum:true,prof_active:false,lg_prof_sample:0";
-#endif
-
 static int
 prof_dump_open_intercept(bool propagate_err, const char *filename)
 {
diff --git a/jemalloc-4.5.0/test/unit/prof_accum.sh b/jemalloc-4.5.0/test/unit/prof_accum.sh
new file mode 100644
index 0000000..b3e13fc
--- /dev/null
+++ b/jemalloc-4.5.0/test/unit/prof_accum.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+if [ "x${enable_prof}" = "x1" ] ; then
+  export MALLOC_CONF="prof:true,prof_accum:true,prof_active:false,lg_prof_sample:0"
+fi
diff --git a/jemalloc-4.4.0/test/unit/prof_active.c b/jemalloc-4.5.0/test/unit/prof_active.c
old mode 100755
new mode 100644
similarity index 96%
rename from jemalloc-4.4.0/test/unit/prof_active.c
rename to jemalloc-4.5.0/test/unit/prof_active.c
index d00943a..a906beb
--- a/jemalloc-4.4.0/test/unit/prof_active.c
+++ b/jemalloc-4.5.0/test/unit/prof_active.c
@@ -1,10 +1,5 @@
 #include "test/jemalloc_test.h"
 
-#ifdef JEMALLOC_PROF
-const char *malloc_conf =
-    "prof:true,prof_thread_active_init:false,lg_prof_sample:0";
-#endif
-
 static void
 mallctl_bool_get(const char *name, bool expected, const char *func, int line)
 {
diff --git a/jemalloc-4.5.0/test/unit/prof_active.sh b/jemalloc-4.5.0/test/unit/prof_active.sh
new file mode 100644
index 0000000..0167cb1
--- /dev/null
+++ b/jemalloc-4.5.0/test/unit/prof_active.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+if [ "x${enable_prof}" = "x1" ] ; then
+  export MALLOC_CONF="prof:true,prof_thread_active_init:false,lg_prof_sample:0"
+fi
diff --git a/jemalloc-4.4.0/test/unit/prof_gdump.c b/jemalloc-4.5.0/test/unit/prof_gdump.c
old mode 100755
new mode 100644
similarity index 94%
rename from jemalloc-4.4.0/test/unit/prof_gdump.c
rename to jemalloc-4.5.0/test/unit/prof_gdump.c
index 996cb67..b88a74c
--- a/jemalloc-4.4.0/test/unit/prof_gdump.c
+++ b/jemalloc-4.5.0/test/unit/prof_gdump.c
@@ -1,9 +1,5 @@
 #include "test/jemalloc_test.h"
 
-#ifdef JEMALLOC_PROF
-const char *malloc_conf = "prof:true,prof_active:false,prof_gdump:true";
-#endif
-
 static bool did_prof_dump_open;
 
 static int
diff --git a/jemalloc-4.5.0/test/unit/prof_gdump.sh b/jemalloc-4.5.0/test/unit/prof_gdump.sh
new file mode 100644
index 0000000..3f600d2
--- /dev/null
+++ b/jemalloc-4.5.0/test/unit/prof_gdump.sh
@@ -0,0 +1,6 @@
+#!/bin/sh
+
+if [ "x${enable_prof}" = "x1" ] ; then
+  export MALLOC_CONF="prof:true,prof_active:false,prof_gdump:true"
+fi
+
diff --git a/jemalloc-4.4.0/test/unit/prof_idump.c b/jemalloc-4.5.0/test/unit/prof_idump.c
old mode 100755
new mode 100644
similarity index 84%
rename from jemalloc-4.4.0/test/unit/prof_idump.c
rename to jemalloc-4.5.0/test/unit/prof_idump.c
index 16c6462..87734a4
--- a/jemalloc-4.4.0/test/unit/prof_idump.c
+++ b/jemalloc-4.5.0/test/unit/prof_idump.c
@@ -1,11 +1,5 @@
 #include "test/jemalloc_test.h"
 
-#ifdef JEMALLOC_PROF
-const char *malloc_conf =
-    "prof:true,prof_accum:true,prof_active:false,lg_prof_sample:0,"
-    "lg_prof_interval:0";
-#endif
-
 static bool did_prof_dump_open;
 
 static int
diff --git a/jemalloc-4.5.0/test/unit/prof_idump.sh b/jemalloc-4.5.0/test/unit/prof_idump.sh
new file mode 100644
index 0000000..08a1b62
--- /dev/null
+++ b/jemalloc-4.5.0/test/unit/prof_idump.sh
@@ -0,0 +1,7 @@
+#!/bin/sh
+
+if [ "x${enable_prof}" = "x1" ] ; then
+  export MALLOC_CONF="prof:true,prof_accum:true,prof_active:false,lg_prof_sample:0,lg_prof_interval:0"
+fi
+
+
diff --git a/jemalloc-4.4.0/test/unit/prof_reset.c b/jemalloc-4.5.0/test/unit/prof_reset.c
old mode 100755
new mode 100644
similarity index 98%
rename from jemalloc-4.4.0/test/unit/prof_reset.c
rename to jemalloc-4.5.0/test/unit/prof_reset.c
index 59d7079..87b0d0c
--- a/jemalloc-4.4.0/test/unit/prof_reset.c
+++ b/jemalloc-4.5.0/test/unit/prof_reset.c
@@ -1,10 +1,5 @@
 #include "test/jemalloc_test.h"
 
-#ifdef JEMALLOC_PROF
-const char *malloc_conf =
-    "prof:true,prof_active:false,lg_prof_sample:0";
-#endif
-
 static int
 prof_dump_open_intercept(bool propagate_err, const char *filename)
 {
diff --git a/jemalloc-4.5.0/test/unit/prof_reset.sh b/jemalloc-4.5.0/test/unit/prof_reset.sh
new file mode 100644
index 0000000..43c516a
--- /dev/null
+++ b/jemalloc-4.5.0/test/unit/prof_reset.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+if [ "x${enable_prof}" = "x1" ] ; then
+  export MALLOC_CONF="prof:true,prof_active:false,lg_prof_sample:0"
+fi
diff --git a/jemalloc-4.5.0/test/unit/prof_tctx.sh b/jemalloc-4.5.0/test/unit/prof_tctx.sh
new file mode 100644
index 0000000..8fcc7d8
--- /dev/null
+++ b/jemalloc-4.5.0/test/unit/prof_tctx.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+if [ "x${enable_prof}" = "x1" ] ; then
+  export MALLOC_CONF="prof:true,lg_prof_sample:0"
+fi
diff --git a/jemalloc-4.4.0/test/unit/prof_thread_name.c b/jemalloc-4.5.0/test/unit/prof_thread_name.c
old mode 100755
new mode 100644
similarity index 97%
rename from jemalloc-4.4.0/test/unit/prof_thread_name.c
rename to jemalloc-4.5.0/test/unit/prof_thread_name.c
index 9ec5497..3251853
--- a/jemalloc-4.4.0/test/unit/prof_thread_name.c
+++ b/jemalloc-4.5.0/test/unit/prof_thread_name.c
@@ -1,9 +1,5 @@
 #include "test/jemalloc_test.h"
 
-#ifdef JEMALLOC_PROF
-const char *malloc_conf = "prof:true,prof_active:false";
-#endif
-
 static void
 mallctl_thread_name_get_impl(const char *thread_name_expected, const char *func,
     int line)
diff --git a/jemalloc-4.5.0/test/unit/prof_thread_name.sh b/jemalloc-4.5.0/test/unit/prof_thread_name.sh
new file mode 100644
index 0000000..298c105
--- /dev/null
+++ b/jemalloc-4.5.0/test/unit/prof_thread_name.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+if [ "x${enable_prof}" = "x1" ] ; then
+  export MALLOC_CONF="prof:true,prof_active:false"
+fi
diff --git a/jemalloc-4.4.0/test/unit/ql.c b/jemalloc-4.5.0/test/unit/ql.c
similarity index 100%
rename from jemalloc-4.4.0/test/unit/ql.c
rename to jemalloc-4.5.0/test/unit/ql.c
diff --git a/jemalloc-4.4.0/test/unit/qr.c b/jemalloc-4.5.0/test/unit/qr.c
similarity index 100%
rename from jemalloc-4.4.0/test/unit/qr.c
rename to jemalloc-4.5.0/test/unit/qr.c
diff --git a/jemalloc-4.4.0/test/unit/quarantine.c b/jemalloc-4.5.0/test/unit/quarantine.c
similarity index 91%
rename from jemalloc-4.4.0/test/unit/quarantine.c
rename to jemalloc-4.5.0/test/unit/quarantine.c
index bbd48a5..6068768 100644
--- a/jemalloc-4.4.0/test/unit/quarantine.c
+++ b/jemalloc-4.5.0/test/unit/quarantine.c
@@ -1,13 +1,7 @@
 #include "test/jemalloc_test.h"
 
+/* Keep in sync with definition in quarantine.sh. */
 #define	QUARANTINE_SIZE		8192
-#define	STRINGIFY_HELPER(x)	#x
-#define	STRINGIFY(x)		STRINGIFY_HELPER(x)
-
-#ifdef JEMALLOC_FILL
-const char *malloc_conf = "abort:false,junk:true,redzone:true,quarantine:"
-    STRINGIFY(QUARANTINE_SIZE);
-#endif
 
 void
 quarantine_clear(void)
diff --git a/jemalloc-4.5.0/test/unit/quarantine.sh b/jemalloc-4.5.0/test/unit/quarantine.sh
new file mode 100644
index 0000000..e3c6932
--- /dev/null
+++ b/jemalloc-4.5.0/test/unit/quarantine.sh
@@ -0,0 +1,8 @@
+#!/bin/sh
+
+# Keep in sync with definition in quarantine.c.
+export QUARANTINE_SIZE=8192
+
+if [ "x${enable_fill}" = "x1" ] ; then
+  export MALLOC_CONF="abort:false,junk:true,redzone:true,quarantine:${QUARANTINE_SIZE}"
+fi
diff --git a/jemalloc-4.4.0/test/unit/rb.c b/jemalloc-4.5.0/test/unit/rb.c
similarity index 100%
rename from jemalloc-4.4.0/test/unit/rb.c
rename to jemalloc-4.5.0/test/unit/rb.c
diff --git a/jemalloc-4.4.0/test/unit/rtree.c b/jemalloc-4.5.0/test/unit/rtree.c
similarity index 100%
rename from jemalloc-4.4.0/test/unit/rtree.c
rename to jemalloc-4.5.0/test/unit/rtree.c
diff --git a/jemalloc-4.4.0/test/unit/run_quantize.c b/jemalloc-4.5.0/test/unit/run_quantize.c
similarity index 100%
rename from jemalloc-4.4.0/test/unit/run_quantize.c
rename to jemalloc-4.5.0/test/unit/run_quantize.c
diff --git a/jemalloc-4.4.0/test/unit/size_classes.c b/jemalloc-4.5.0/test/unit/size_classes.c
old mode 100755
new mode 100644
similarity index 100%
rename from jemalloc-4.4.0/test/unit/size_classes.c
rename to jemalloc-4.5.0/test/unit/size_classes.c
diff --git a/jemalloc-4.4.0/test/unit/smoothstep.c b/jemalloc-4.5.0/test/unit/smoothstep.c
similarity index 100%
rename from jemalloc-4.4.0/test/unit/smoothstep.c
rename to jemalloc-4.5.0/test/unit/smoothstep.c
diff --git a/jemalloc-4.4.0/test/unit/stats.c b/jemalloc-4.5.0/test/unit/stats.c
old mode 100755
new mode 100644
similarity index 100%
rename from jemalloc-4.4.0/test/unit/stats.c
rename to jemalloc-4.5.0/test/unit/stats.c
diff --git a/jemalloc-4.5.0/test/unit/stats_print.c b/jemalloc-4.5.0/test/unit/stats_print.c
new file mode 100644
index 0000000..4f412dc
--- /dev/null
+++ b/jemalloc-4.5.0/test/unit/stats_print.c
@@ -0,0 +1,1005 @@
+#include "test/jemalloc_test.h"
+
+typedef enum {
+	TOKEN_TYPE_NONE,
+	TOKEN_TYPE_ERROR,
+	TOKEN_TYPE_EOI,
+	TOKEN_TYPE_NULL,
+	TOKEN_TYPE_FALSE,
+	TOKEN_TYPE_TRUE,
+	TOKEN_TYPE_LBRACKET,
+	TOKEN_TYPE_RBRACKET,
+	TOKEN_TYPE_LBRACE,
+	TOKEN_TYPE_RBRACE,
+	TOKEN_TYPE_COLON,
+	TOKEN_TYPE_COMMA,
+	TOKEN_TYPE_STRING,
+	TOKEN_TYPE_NUMBER
+} token_type_t;
+
+typedef struct parser_s parser_t;
+typedef struct {
+	parser_t	*parser;
+	token_type_t	token_type;
+	size_t		pos;
+	size_t		len;
+	size_t		line;
+	size_t		col;
+} token_t;
+
+struct parser_s {
+	bool verbose;
+	char	*buf; /* '\0'-terminated. */
+	size_t	len; /* Number of characters preceding '\0' in buf. */
+	size_t	pos;
+	size_t	line;
+	size_t	col;
+	token_t	token;
+};
+
+static void
+token_init(token_t *token, parser_t *parser, token_type_t token_type,
+    size_t pos, size_t len, size_t line, size_t col)
+{
+	token->parser = parser;
+	token->token_type = token_type;
+	token->pos = pos;
+	token->len = len;
+	token->line = line;
+	token->col = col;
+}
+
+static void
+token_error(token_t *token)
+{
+	if (!token->parser->verbose) {
+		return;
+	}
+	switch (token->token_type) {
+	case TOKEN_TYPE_NONE:
+		not_reached();
+	case TOKEN_TYPE_ERROR:
+		malloc_printf("%zu:%zu: Unexpected character in token: ",
+		    token->line, token->col);
+		break;
+	default:
+		malloc_printf("%zu:%zu: Unexpected token: ", token->line,
+		    token->col);
+		break;
+	}
+	{
+		UNUSED ssize_t err = write(STDERR_FILENO,
+		    &token->parser->buf[token->pos], token->len);
+	}
+	malloc_printf("\n");
+}
+
+static void
+parser_init(parser_t *parser, bool verbose)
+{
+	parser->verbose = verbose;
+	parser->buf = NULL;
+	parser->len = 0;
+	parser->pos = 0;
+	parser->line = 1;
+	parser->col = 0;
+}
+
+static void
+parser_fini(parser_t *parser)
+{
+	if (parser->buf != NULL) {
+		dallocx(parser->buf, MALLOCX_TCACHE_NONE);
+	}
+}
+
+static bool
+parser_append(parser_t *parser, const char *str)
+{
+	size_t len = strlen(str);
+	char *buf = (parser->buf == NULL) ? mallocx(len + 1,
+	    MALLOCX_TCACHE_NONE) : rallocx(parser->buf, parser->len + len + 1,
+	    MALLOCX_TCACHE_NONE);
+	if (buf == NULL) {
+		return true;
+	}
+	memcpy(&buf[parser->len], str, len + 1);
+	parser->buf = buf;
+	parser->len += len;
+	return false;
+}
+
+static bool
+parser_tokenize(parser_t *parser)
+{
+	enum {
+		STATE_START,
+		STATE_EOI,
+		STATE_N, STATE_NU, STATE_NUL, STATE_NULL,
+		STATE_F, STATE_FA, STATE_FAL, STATE_FALS, STATE_FALSE,
+		STATE_T, STATE_TR, STATE_TRU, STATE_TRUE,
+		STATE_LBRACKET,
+		STATE_RBRACKET,
+		STATE_LBRACE,
+		STATE_RBRACE,
+		STATE_COLON,
+		STATE_COMMA,
+		STATE_CHARS,
+		STATE_CHAR_ESCAPE,
+		STATE_CHAR_U, STATE_CHAR_UD, STATE_CHAR_UDD, STATE_CHAR_UDDD,
+		STATE_STRING,
+		STATE_MINUS,
+		STATE_LEADING_ZERO,
+		STATE_DIGITS,
+		STATE_DECIMAL,
+		STATE_FRAC_DIGITS,
+		STATE_EXP,
+		STATE_EXP_SIGN,
+		STATE_EXP_DIGITS,
+		STATE_ACCEPT
+	} state = STATE_START;
+	size_t token_pos JEMALLOC_CC_SILENCE_INIT(0);
+	size_t token_line JEMALLOC_CC_SILENCE_INIT(1);
+	size_t token_col JEMALLOC_CC_SILENCE_INIT(0);
+
+	assert_zu_le(parser->pos, parser->len,
+	    "Position is past end of buffer");
+
+	while (state != STATE_ACCEPT) {
+		char c = parser->buf[parser->pos];
+
+		switch (state) {
+		case STATE_START:
+			token_pos = parser->pos;
+			token_line = parser->line;
+			token_col = parser->col;
+			switch (c) {
+			case ' ': case '\b': case '\n': case '\r': case '\t':
+				break;
+			case '\0':
+				state = STATE_EOI;
+				break;
+			case 'n':
+				state = STATE_N;
+				break;
+			case 'f':
+				state = STATE_F;
+				break;
+			case 't':
+				state = STATE_T;
+				break;
+			case '[':
+				state = STATE_LBRACKET;
+				break;
+			case ']':
+				state = STATE_RBRACKET;
+				break;
+			case '{':
+				state = STATE_LBRACE;
+				break;
+			case '}':
+				state = STATE_RBRACE;
+				break;
+			case ':':
+				state = STATE_COLON;
+				break;
+			case ',':
+				state = STATE_COMMA;
+				break;
+			case '"':
+				state = STATE_CHARS;
+				break;
+			case '-':
+				state = STATE_MINUS;
+				break;
+			case '0':
+				state = STATE_LEADING_ZERO;
+				break;
+			case '1': case '2': case '3': case '4':
+			case '5': case '6': case '7': case '8': case '9':
+				state = STATE_DIGITS;
+				break;
+			default:
+				token_init(&parser->token, parser,
+				    TOKEN_TYPE_ERROR, token_pos, parser->pos + 1
+				    - token_pos, token_line, token_col);
+				return true;
+			}
+			break;
+		case STATE_EOI:
+			token_init(&parser->token, parser,
+			    TOKEN_TYPE_EOI, token_pos, parser->pos -
+			    token_pos, token_line, token_col);
+			state = STATE_ACCEPT;
+			break;
+		case STATE_N:
+			switch (c) {
+			case 'u':
+				state = STATE_NU;
+				break;
+			default:
+				token_init(&parser->token, parser,
+				    TOKEN_TYPE_ERROR, token_pos, parser->pos + 1
+				    - token_pos, token_line, token_col);
+				return true;
+			}
+			break;
+		case STATE_NU:
+			switch (c) {
+			case 'l':
+				state = STATE_NUL;
+				break;
+			default:
+				token_init(&parser->token, parser,
+				    TOKEN_TYPE_ERROR, token_pos, parser->pos + 1
+				    - token_pos, token_line, token_col);
+				return true;
+			}
+			break;
+		case STATE_NUL:
+			switch (c) {
+			case 'l':
+				state = STATE_NULL;
+				break;
+			default:
+				token_init(&parser->token, parser,
+				    TOKEN_TYPE_ERROR, token_pos, parser->pos + 1
+				    - token_pos, token_line, token_col);
+				return true;
+			}
+			break;
+		case STATE_NULL:
+			switch (c) {
+			case ' ': case '\b': case '\n': case '\r': case '\t':
+			case '\0':
+			case '[': case ']': case '{': case '}': case ':':
+			case ',':
+				break;
+			default:
+				token_init(&parser->token, parser,
+				    TOKEN_TYPE_ERROR, token_pos, parser->pos + 1
+				    - token_pos, token_line, token_col);
+				return true;
+			}
+			token_init(&parser->token, parser, TOKEN_TYPE_NULL,
+			    token_pos, parser->pos - token_pos, token_line,
+			    token_col);
+			state = STATE_ACCEPT;
+			break;
+		case STATE_F:
+			switch (c) {
+			case 'a':
+				state = STATE_FA;
+				break;
+			default:
+				token_init(&parser->token, parser,
+				    TOKEN_TYPE_ERROR, token_pos, parser->pos + 1
+				    - token_pos, token_line, token_col);
+				return true;
+			}
+			break;
+		case STATE_FA:
+			switch (c) {
+			case 'l':
+				state = STATE_FAL;
+				break;
+			default:
+				token_init(&parser->token, parser,
+				    TOKEN_TYPE_ERROR, token_pos, parser->pos + 1
+				    - token_pos, token_line, token_col);
+				return true;
+			}
+			break;
+		case STATE_FAL:
+			switch (c) {
+			case 's':
+				state = STATE_FALS;
+				break;
+			default:
+				token_init(&parser->token, parser,
+				    TOKEN_TYPE_ERROR, token_pos, parser->pos + 1
+				    - token_pos, token_line, token_col);
+				return true;
+			}
+			break;
+		case STATE_FALS:
+			switch (c) {
+			case 'e':
+				state = STATE_FALSE;
+				break;
+			default:
+				token_init(&parser->token, parser,
+				    TOKEN_TYPE_ERROR, token_pos, parser->pos + 1
+				    - token_pos, token_line, token_col);
+				return true;
+			}
+			break;
+		case STATE_FALSE:
+			switch (c) {
+			case ' ': case '\b': case '\n': case '\r': case '\t':
+			case '\0':
+			case '[': case ']': case '{': case '}': case ':':
+			case ',':
+				break;
+			default:
+				token_init(&parser->token, parser,
+				    TOKEN_TYPE_ERROR, token_pos, parser->pos + 1
+				    - token_pos, token_line, token_col);
+				return true;
+			}
+			token_init(&parser->token, parser,
+			    TOKEN_TYPE_FALSE, token_pos, parser->pos -
+			    token_pos, token_line, token_col);
+			state = STATE_ACCEPT;
+			break;
+		case STATE_T:
+			switch (c) {
+			case 'r':
+				state = STATE_TR;
+				break;
+			default:
+				token_init(&parser->token, parser,
+				    TOKEN_TYPE_ERROR, token_pos, parser->pos + 1
+				    - token_pos, token_line, token_col);
+				return true;
+			}
+			break;
+		case STATE_TR:
+			switch (c) {
+			case 'u':
+				state = STATE_TRU;
+				break;
+			default:
+				token_init(&parser->token, parser,
+				    TOKEN_TYPE_ERROR, token_pos, parser->pos + 1
+				    - token_pos, token_line, token_col);
+				return true;
+			}
+			break;
+		case STATE_TRU:
+			switch (c) {
+			case 'e':
+				state = STATE_TRUE;
+				break;
+			default:
+				token_init(&parser->token, parser,
+				    TOKEN_TYPE_ERROR, token_pos, parser->pos + 1
+				    - token_pos, token_line, token_col);
+				return true;
+			}
+			break;
+		case STATE_TRUE:
+			switch (c) {
+			case ' ': case '\b': case '\n': case '\r': case '\t':
+			case '\0':
+			case '[': case ']': case '{': case '}': case ':':
+			case ',':
+				break;
+			default:
+				token_init(&parser->token, parser,
+				    TOKEN_TYPE_ERROR, token_pos, parser->pos + 1
+				    - token_pos, token_line, token_col);
+				return true;
+			}
+			token_init(&parser->token, parser, TOKEN_TYPE_TRUE,
+			    token_pos, parser->pos - token_pos, token_line,
+			    token_col);
+			state = STATE_ACCEPT;
+			break;
+		case STATE_LBRACKET:
+			token_init(&parser->token, parser, TOKEN_TYPE_LBRACKET,
+			    token_pos, parser->pos - token_pos, token_line,
+			    token_col);
+			state = STATE_ACCEPT;
+			break;
+		case STATE_RBRACKET:
+			token_init(&parser->token, parser, TOKEN_TYPE_RBRACKET,
+			    token_pos, parser->pos - token_pos, token_line,
+			    token_col);
+			state = STATE_ACCEPT;
+			break;
+		case STATE_LBRACE:
+			token_init(&parser->token, parser, TOKEN_TYPE_LBRACE,
+			    token_pos, parser->pos - token_pos, token_line,
+			    token_col);
+			state = STATE_ACCEPT;
+			break;
+		case STATE_RBRACE:
+			token_init(&parser->token, parser, TOKEN_TYPE_RBRACE,
+			    token_pos, parser->pos - token_pos, token_line,
+			    token_col);
+			state = STATE_ACCEPT;
+			break;
+		case STATE_COLON:
+			token_init(&parser->token, parser, TOKEN_TYPE_COLON,
+			    token_pos, parser->pos - token_pos, token_line,
+			    token_col);
+			state = STATE_ACCEPT;
+			break;
+		case STATE_COMMA:
+			token_init(&parser->token, parser, TOKEN_TYPE_COMMA,
+			    token_pos, parser->pos - token_pos, token_line,
+			    token_col);
+			state = STATE_ACCEPT;
+			break;
+		case STATE_CHARS:
+			switch (c) {
+			case '\\':
+				state = STATE_CHAR_ESCAPE;
+				break;
+			case '"':
+				state = STATE_STRING;
+				break;
+			case 0x00: case 0x01: case 0x02: case 0x03: case 0x04:
+			case 0x05: case 0x06: case 0x07: case 0x08: case 0x09:
+			case 0x0a: case 0x0b: case 0x0c: case 0x0d: case 0x0e:
+			case 0x0f: case 0x10: case 0x11: case 0x12: case 0x13:
+			case 0x14: case 0x15: case 0x16: case 0x17: case 0x18:
+			case 0x19: case 0x1a: case 0x1b: case 0x1c: case 0x1d:
+			case 0x1e: case 0x1f:
+				token_init(&parser->token, parser,
+				    TOKEN_TYPE_ERROR, token_pos, parser->pos + 1
+				    - token_pos, token_line, token_col);
+				return true;
+			default:
+				break;
+			}
+			break;
+		case STATE_CHAR_ESCAPE:
+			switch (c) {
+			case '"': case '\\': case '/': case 'b': case 'n':
+			case 'r': case 't':
+				state = STATE_CHARS;
+				break;
+			case 'u':
+				state = STATE_CHAR_U;
+				break;
+			default:
+				token_init(&parser->token, parser,
+				    TOKEN_TYPE_ERROR, token_pos, parser->pos + 1
+				    - token_pos, token_line, token_col);
+				return true;
+			}
+			break;
+		case STATE_CHAR_U:
+			switch (c) {
+			case '0': case '1': case '2': case '3': case '4':
+			case '5': case '6': case '7': case '8': case '9':
+			case 'a': case 'b': case 'c': case 'd': case 'e':
+			case 'f':
+			case 'A': case 'B': case 'C': case 'D': case 'E':
+			case 'F':
+				state = STATE_CHAR_UD;
+				break;
+			default:
+				token_init(&parser->token, parser,
+				    TOKEN_TYPE_ERROR, token_pos, parser->pos + 1
+				    - token_pos, token_line, token_col);
+				return true;
+			}
+			break;
+		case STATE_CHAR_UD:
+			switch (c) {
+			case '0': case '1': case '2': case '3': case '4':
+			case '5': case '6': case '7': case '8': case '9':
+			case 'a': case 'b': case 'c': case 'd': case 'e':
+			case 'f':
+			case 'A': case 'B': case 'C': case 'D': case 'E':
+			case 'F':
+				state = STATE_CHAR_UDD;
+				break;
+			default:
+				token_init(&parser->token, parser,
+				    TOKEN_TYPE_ERROR, token_pos, parser->pos + 1
+				    - token_pos, token_line, token_col);
+				return true;
+			}
+			break;
+		case STATE_CHAR_UDD:
+			switch (c) {
+			case '0': case '1': case '2': case '3': case '4':
+			case '5': case '6': case '7': case '8': case '9':
+			case 'a': case 'b': case 'c': case 'd': case 'e':
+			case 'f':
+			case 'A': case 'B': case 'C': case 'D': case 'E':
+			case 'F':
+				state = STATE_CHAR_UDDD;
+				break;
+			default:
+				token_init(&parser->token, parser,
+				    TOKEN_TYPE_ERROR, token_pos, parser->pos + 1
+				    - token_pos, token_line, token_col);
+				return true;
+			}
+			break;
+		case STATE_CHAR_UDDD:
+			switch (c) {
+			case '0': case '1': case '2': case '3': case '4':
+			case '5': case '6': case '7': case '8': case '9':
+			case 'a': case 'b': case 'c': case 'd': case 'e':
+			case 'f':
+			case 'A': case 'B': case 'C': case 'D': case 'E':
+			case 'F':
+				state = STATE_CHARS;
+				break;
+			default:
+				token_init(&parser->token, parser,
+				    TOKEN_TYPE_ERROR, token_pos, parser->pos + 1
+				    - token_pos, token_line, token_col);
+				return true;
+			}
+			break;
+		case STATE_STRING:
+			token_init(&parser->token, parser, TOKEN_TYPE_STRING,
+			    token_pos, parser->pos - token_pos, token_line,
+			    token_col);
+			state = STATE_ACCEPT;
+			break;
+		case STATE_MINUS:
+			switch (c) {
+			case '0':
+				state = STATE_LEADING_ZERO;
+				break;
+			case '1': case '2': case '3': case '4':
+			case '5': case '6': case '7': case '8': case '9':
+				state = STATE_DIGITS;
+				break;
+			default:
+				token_init(&parser->token, parser,
+				    TOKEN_TYPE_ERROR, token_pos, parser->pos + 1
+				    - token_pos, token_line, token_col);
+				return true;
+			}
+			break;
+		case STATE_LEADING_ZERO:
+			switch (c) {
+			case '.':
+				state = STATE_DECIMAL;
+				break;
+			default:
+				token_init(&parser->token, parser,
+				    TOKEN_TYPE_NUMBER, token_pos, parser->pos -
+				    token_pos, token_line, token_col);
+				state = STATE_ACCEPT;
+				break;
+			}
+			break;
+		case STATE_DIGITS:
+			switch (c) {
+			case '0': case '1': case '2': case '3': case '4':
+			case '5': case '6': case '7': case '8': case '9':
+				break;
+			case '.':
+				state = STATE_DECIMAL;
+				break;
+			default:
+				token_init(&parser->token, parser,
+				    TOKEN_TYPE_NUMBER, token_pos, parser->pos -
+				    token_pos, token_line, token_col);
+				state = STATE_ACCEPT;
+				break;
+			}
+			break;
+		case STATE_DECIMAL:
+			switch (c) {
+			case '0': case '1': case '2': case '3': case '4':
+			case '5': case '6': case '7': case '8': case '9':
+				state = STATE_FRAC_DIGITS;
+				break;
+			default:
+				token_init(&parser->token, parser,
+				    TOKEN_TYPE_ERROR, token_pos, parser->pos + 1
+				    - token_pos, token_line, token_col);
+				return true;
+			}
+			break;
+		case STATE_FRAC_DIGITS:
+			switch (c) {
+			case '0': case '1': case '2': case '3': case '4':
+			case '5': case '6': case '7': case '8': case '9':
+				break;
+			case 'e': case 'E':
+				state = STATE_EXP;
+				break;
+			default:
+				token_init(&parser->token, parser,
+				    TOKEN_TYPE_NUMBER, token_pos, parser->pos -
+				    token_pos, token_line, token_col);
+				state = STATE_ACCEPT;
+				break;
+			}
+			break;
+		case STATE_EXP:
+			switch (c) {
+			case '-': case '+':
+				state = STATE_EXP_SIGN;
+				break;
+			case '0': case '1': case '2': case '3': case '4':
+			case '5': case '6': case '7': case '8': case '9':
+				state = STATE_EXP_DIGITS;
+				break;
+			default:
+				token_init(&parser->token, parser,
+				    TOKEN_TYPE_ERROR, token_pos, parser->pos + 1
+				    - token_pos, token_line, token_col);
+				return true;
+			}
+			break;
+		case STATE_EXP_SIGN:
+			switch (c) {
+			case '0': case '1': case '2': case '3': case '4':
+			case '5': case '6': case '7': case '8': case '9':
+				state = STATE_EXP_DIGITS;
+				break;
+			default:
+				token_init(&parser->token, parser,
+				    TOKEN_TYPE_ERROR, token_pos, parser->pos + 1
+				    - token_pos, token_line, token_col);
+				return true;
+			}
+			break;
+		case STATE_EXP_DIGITS:
+			switch (c) {
+			case '0': case '1': case '2': case '3': case '4':
+			case '5': case '6': case '7': case '8': case '9':
+				break;
+			default:
+				token_init(&parser->token, parser,
+				    TOKEN_TYPE_NUMBER, token_pos, parser->pos -
+				    token_pos, token_line, token_col);
+				state = STATE_ACCEPT;
+				break;
+			}
+			break;
+		default:
+			not_reached();
+		}
+
+		if (state != STATE_ACCEPT) {
+			if (c == '\n') {
+				parser->line++;
+				parser->col = 0;
+			} else {
+				parser->col++;
+			}
+			parser->pos++;
+		}
+	}
+	return false;
+}
+
+static bool	parser_parse_array(parser_t *parser);
+static bool	parser_parse_object(parser_t *parser);
+
+static bool
+parser_parse_value(parser_t *parser)
+{
+	switch (parser->token.token_type) {
+	case TOKEN_TYPE_NULL:
+	case TOKEN_TYPE_FALSE:
+	case TOKEN_TYPE_TRUE:
+	case TOKEN_TYPE_STRING:
+	case TOKEN_TYPE_NUMBER:
+		return false;
+	case TOKEN_TYPE_LBRACE:
+		return parser_parse_object(parser);
+	case TOKEN_TYPE_LBRACKET:
+		return parser_parse_array(parser);
+	default:
+		return true;
+	}
+	not_reached();
+}
+
+static bool
+parser_parse_pair(parser_t *parser)
+{
+	assert_d_eq(parser->token.token_type, TOKEN_TYPE_STRING,
+	    "Pair should start with string");
+	if (parser_tokenize(parser)) {
+		return true;
+	}
+	switch (parser->token.token_type) {
+	case TOKEN_TYPE_COLON:
+		if (parser_tokenize(parser)) {
+			return true;
+		}
+		return parser_parse_value(parser);
+	default:
+		return true;
+	}
+}
+
+static bool
+parser_parse_values(parser_t *parser)
+{
+	if (parser_parse_value(parser)) {
+		return true;
+	}
+
+	while (true) {
+		if (parser_tokenize(parser)) {
+			return true;
+		}
+		switch (parser->token.token_type) {
+		case TOKEN_TYPE_COMMA:
+			if (parser_tokenize(parser)) {
+				return true;
+			}
+			if (parser_parse_value(parser)) {
+				return true;
+			}
+			break;
+		case TOKEN_TYPE_RBRACKET:
+			return false;
+		default:
+			return true;
+		}
+	}
+}
+
+static bool
+parser_parse_array(parser_t *parser)
+{
+	assert_d_eq(parser->token.token_type, TOKEN_TYPE_LBRACKET,
+	    "Array should start with [");
+	if (parser_tokenize(parser)) {
+		return true;
+	}
+	switch (parser->token.token_type) {
+	case TOKEN_TYPE_RBRACKET:
+		return false;
+	default:
+		return parser_parse_values(parser);
+	}
+	not_reached();
+}
+
+static bool
+parser_parse_pairs(parser_t *parser)
+{
+	assert_d_eq(parser->token.token_type, TOKEN_TYPE_STRING,
+	    "Object should start with string");
+	if (parser_parse_pair(parser)) {
+		return true;
+	}
+
+	while (true) {
+		if (parser_tokenize(parser)) {
+			return true;
+		}
+		switch (parser->token.token_type) {
+		case TOKEN_TYPE_COMMA:
+			if (parser_tokenize(parser)) {
+				return true;
+			}
+			switch (parser->token.token_type) {
+			case TOKEN_TYPE_STRING:
+				if (parser_parse_pair(parser)) {
+					return true;
+				}
+				break;
+			default:
+				return true;
+			}
+			break;
+		case TOKEN_TYPE_RBRACE:
+			return false;
+		default:
+			return true;
+		}
+	}
+}
+
+static bool
+parser_parse_object(parser_t *parser)
+{
+	assert_d_eq(parser->token.token_type, TOKEN_TYPE_LBRACE,
+	    "Object should start with {");
+	if (parser_tokenize(parser)) {
+		return true;
+	}
+	switch (parser->token.token_type) {
+	case TOKEN_TYPE_STRING:
+		return parser_parse_pairs(parser);
+	case TOKEN_TYPE_RBRACE:
+		return false;
+	default:
+		return true;
+	}
+	not_reached();
+}
+
+static bool
+parser_parse(parser_t *parser)
+{
+	if (parser_tokenize(parser)) {
+		goto label_error;
+	}
+	if (parser_parse_value(parser)) {
+		goto label_error;
+	}
+
+	if (parser_tokenize(parser)) {
+		goto label_error;
+	}
+	switch (parser->token.token_type) {
+	case TOKEN_TYPE_EOI:
+		return false;
+	default:
+		goto label_error;
+	}
+	not_reached();
+
+label_error:
+	token_error(&parser->token);
+	return true;
+}
+
+TEST_BEGIN(test_json_parser)
+{
+	size_t i;
+	const char *invalid_inputs[] = {
+		/* Tokenizer error case tests. */
+		"{ \"string\": X }",
+		"{ \"string\": nXll }",
+		"{ \"string\": nuXl }",
+		"{ \"string\": nulX }",
+		"{ \"string\": nullX }",
+		"{ \"string\": fXlse }",
+		"{ \"string\": faXse }",
+		"{ \"string\": falXe }",
+		"{ \"string\": falsX }",
+		"{ \"string\": falseX }",
+		"{ \"string\": tXue }",
+		"{ \"string\": trXe }",
+		"{ \"string\": truX }",
+		"{ \"string\": trueX }",
+		"{ \"string\": \"\n\" }",
+		"{ \"string\": \"\\z\" }",
+		"{ \"string\": \"\\uX000\" }",
+		"{ \"string\": \"\\u0X00\" }",
+		"{ \"string\": \"\\u00X0\" }",
+		"{ \"string\": \"\\u000X\" }",
+		"{ \"string\": -X }",
+		"{ \"string\": 0.X }",
+		"{ \"string\": 0.0eX }",
+		"{ \"string\": 0.0e+X }",
+
+		/* Parser error test cases. */
+		"{\"string\": }",
+		"{\"string\" }",
+		"{\"string\": [ 0 }",
+		"{\"string\": {\"a\":0, 1 } }",
+		"{\"string\": {\"a\":0: } }",
+		"{",
+		"{}{",
+	};
+	const char *valid_inputs[] = {
+		/* Token tests. */
+		"null",
+		"false",
+		"true",
+		"{}",
+		"{\"a\": 0}",
+		"[]",
+		"[0, 1]",
+		"0",
+		"1",
+		"10",
+		"-10",
+		"10.23",
+		"10.23e4",
+		"10.23e-4",
+		"10.23e+4",
+		"10.23E4",
+		"10.23E-4",
+		"10.23E+4",
+		"-10.23",
+		"-10.23e4",
+		"-10.23e-4",
+		"-10.23e+4",
+		"-10.23E4",
+		"-10.23E-4",
+		"-10.23E+4",
+		"\"value\"",
+		"\" \\\" \\/ \\b \\n \\r \\t \\u0abc \\u1DEF \"",
+
+		/* Parser test with various nesting. */
+		"{\"a\":null, \"b\":[1,[{\"c\":2},3]], \"d\":{\"e\":true}}",
+	};
+
+	for (i = 0; i < sizeof(invalid_inputs)/sizeof(const char *); i++) {
+		const char *input = invalid_inputs[i];
+		parser_t parser;
+		parser_init(&parser, false);
+		assert_false(parser_append(&parser, input),
+		    "Unexpected input appending failure");
+		assert_true(parser_parse(&parser),
+		    "Unexpected parse success for input: %s", input);
+		parser_fini(&parser);
+	}
+
+	for (i = 0; i < sizeof(valid_inputs)/sizeof(const char *); i++) {
+		const char *input = valid_inputs[i];
+		parser_t parser;
+		parser_init(&parser, true);
+		assert_false(parser_append(&parser, input),
+		    "Unexpected input appending failure");
+		assert_false(parser_parse(&parser),
+		    "Unexpected parse error for input: %s", input);
+		parser_fini(&parser);
+	}
+}
+TEST_END
+
+void
+write_cb(void *opaque, const char *str)
+{
+	parser_t *parser = (parser_t *)opaque;
+	if (parser_append(parser, str)) {
+		test_fail("Unexpected input appending failure");
+	}
+}
+
+TEST_BEGIN(test_stats_print_json)
+{
+	const char *opts[] = {
+		"J",
+		"Jg",
+		"Jm",
+		"Jgm",
+		"Ja",
+		"Jb",
+		"Jab",
+		"Jl",
+		"Jal",
+		"Jbl",
+		"Jabl",
+		"Jh",
+		"Jah",
+		"Jbh",
+		"Jabh",
+		"Jlh",
+		"Jalh",
+		"Jblh",
+		"Jablh",
+		"Jgmablh",
+	};
+	unsigned arena_ind, i;
+
+	for (i = 0; i < 2; i++) {
+		unsigned j;
+
+		switch (i) {
+		case 0:
+			break;
+		case 1: {
+			size_t sz = sizeof(arena_ind);
+			assert_d_eq(mallctl("arenas.extend", (void *)&arena_ind,
+			    &sz, NULL, 0), 0, "Unexpected mallctl failure");
+			break;
+		} default:
+			not_reached();
+		}
+
+		for (j = 0; j < sizeof(opts)/sizeof(const char *); j++) {
+			parser_t parser;
+
+			parser_init(&parser, true);
+			malloc_stats_print(write_cb, (void *)&parser, opts[j]);
+			assert_false(parser_parse(&parser),
+			    "Unexpected parse error, opts=\"%s\"", opts[j]);
+			parser_fini(&parser);
+		}
+	}
+}
+TEST_END
+
+int
+main(void)
+{
+	return (test(
+	    test_json_parser,
+	    test_stats_print_json));
+}
diff --git a/jemalloc-4.4.0/test/unit/ticker.c b/jemalloc-4.5.0/test/unit/ticker.c
similarity index 100%
rename from jemalloc-4.4.0/test/unit/ticker.c
rename to jemalloc-4.5.0/test/unit/ticker.c
diff --git a/jemalloc-4.4.0/test/unit/tsd.c b/jemalloc-4.5.0/test/unit/tsd.c
similarity index 100%
rename from jemalloc-4.4.0/test/unit/tsd.c
rename to jemalloc-4.5.0/test/unit/tsd.c
diff --git a/jemalloc-4.4.0/test/unit/util.c b/jemalloc-4.5.0/test/unit/util.c
similarity index 100%
rename from jemalloc-4.4.0/test/unit/util.c
rename to jemalloc-4.5.0/test/unit/util.c
diff --git a/jemalloc-4.4.0/test/unit/witness.c b/jemalloc-4.5.0/test/unit/witness.c
similarity index 76%
rename from jemalloc-4.4.0/test/unit/witness.c
rename to jemalloc-4.5.0/test/unit/witness.c
index ed17275..8b99413 100644
--- a/jemalloc-4.4.0/test/unit/witness.c
+++ b/jemalloc-4.5.0/test/unit/witness.c
@@ -3,12 +3,12 @@
 static witness_lock_error_t *witness_lock_error_orig;
 static witness_owner_error_t *witness_owner_error_orig;
 static witness_not_owner_error_t *witness_not_owner_error_orig;
-static witness_lockless_error_t *witness_lockless_error_orig;
+static witness_depth_error_t *witness_depth_error_orig;
 
 static bool saw_lock_error;
 static bool saw_owner_error;
 static bool saw_not_owner_error;
-static bool saw_lockless_error;
+static bool saw_depth_error;
 
 static void
 witness_lock_error_intercept(const witness_list_t *witnesses,
@@ -33,10 +33,9 @@ witness_not_owner_error_intercept(const witness_t *witness)
 }
 
 static void
-witness_lockless_error_intercept(const witness_list_t *witnesses)
-{
-
-	saw_lockless_error = true;
+witness_depth_error_intercept(const witness_list_t *witnesses,
+    witness_rank_t rank_inclusive, unsigned depth) {
+	saw_depth_error = true;
 }
 
 static int
@@ -67,21 +66,36 @@ TEST_BEGIN(test_witness)
 	tsdn = tsdn_fetch();
 
 	witness_assert_lockless(tsdn);
+	witness_assert_depth(tsdn, 0);
+	witness_assert_depth_to_rank(tsdn, (witness_rank_t)1U, 0);
 
 	witness_init(&a, "a", 1, NULL);
 	witness_assert_not_owner(tsdn, &a);
 	witness_lock(tsdn, &a);
 	witness_assert_owner(tsdn, &a);
+	witness_assert_depth(tsdn, 1);
+	witness_assert_depth_to_rank(tsdn, (witness_rank_t)1U, 1);
+	witness_assert_depth_to_rank(tsdn, (witness_rank_t)2U, 0);
 
 	witness_init(&b, "b", 2, NULL);
 	witness_assert_not_owner(tsdn, &b);
 	witness_lock(tsdn, &b);
 	witness_assert_owner(tsdn, &b);
+	witness_assert_depth(tsdn, 2);
+	witness_assert_depth_to_rank(tsdn, (witness_rank_t)1U, 2);
+	witness_assert_depth_to_rank(tsdn, (witness_rank_t)2U, 1);
+	witness_assert_depth_to_rank(tsdn, (witness_rank_t)3U, 0);
 
 	witness_unlock(tsdn, &a);
+	witness_assert_depth(tsdn, 1);
+	witness_assert_depth_to_rank(tsdn, (witness_rank_t)1U, 1);
+	witness_assert_depth_to_rank(tsdn, (witness_rank_t)2U, 1);
+	witness_assert_depth_to_rank(tsdn, (witness_rank_t)3U, 0);
 	witness_unlock(tsdn, &b);
 
 	witness_assert_lockless(tsdn);
+	witness_assert_depth(tsdn, 0);
+	witness_assert_depth_to_rank(tsdn, (witness_rank_t)1U, 0);
 }
 TEST_END
 
@@ -100,12 +114,15 @@ TEST_BEGIN(test_witness_comp)
 	witness_assert_not_owner(tsdn, &a);
 	witness_lock(tsdn, &a);
 	witness_assert_owner(tsdn, &a);
+	witness_assert_depth(tsdn, 1);
 
 	witness_init(&b, "b", 1, witness_comp);
 	witness_assert_not_owner(tsdn, &b);
 	witness_lock(tsdn, &b);
 	witness_assert_owner(tsdn, &b);
+	witness_assert_depth(tsdn, 2);
 	witness_unlock(tsdn, &b);
+	witness_assert_depth(tsdn, 1);
 
 	witness_lock_error_orig = witness_lock_error;
 	witness_lock_error = witness_lock_error_intercept;
@@ -117,6 +134,7 @@ TEST_BEGIN(test_witness_comp)
 	witness_lock(tsdn, &c);
 	assert_true(saw_lock_error, "Expected witness lock error");
 	witness_unlock(tsdn, &c);
+	witness_assert_depth(tsdn, 1);
 
 	saw_lock_error = false;
 
@@ -126,6 +144,7 @@ TEST_BEGIN(test_witness_comp)
 	witness_lock(tsdn, &d);
 	assert_true(saw_lock_error, "Expected witness lock error");
 	witness_unlock(tsdn, &d);
+	witness_assert_depth(tsdn, 1);
 
 	witness_unlock(tsdn, &a);
 
@@ -154,11 +173,13 @@ TEST_BEGIN(test_witness_reversal)
 	witness_init(&b, "b", 2, NULL);
 
 	witness_lock(tsdn, &b);
+	witness_assert_depth(tsdn, 1);
 	assert_false(saw_lock_error, "Unexpected witness lock error");
 	witness_lock(tsdn, &a);
 	assert_true(saw_lock_error, "Expected witness lock error");
 
 	witness_unlock(tsdn, &a);
+	witness_assert_depth(tsdn, 1);
 	witness_unlock(tsdn, &b);
 
 	witness_assert_lockless(tsdn);
@@ -232,35 +253,38 @@ TEST_BEGIN(test_witness_unlock_not_owned)
 }
 TEST_END
 
-TEST_BEGIN(test_witness_lockful)
-{
+TEST_BEGIN(test_witness_depth) {
 	witness_t a;
 	tsdn_t *tsdn;
 
 	test_skip_if(!config_debug);
 
-	witness_lockless_error_orig = witness_lockless_error;
-	witness_lockless_error = witness_lockless_error_intercept;
-	saw_lockless_error = false;
+	witness_depth_error_orig = witness_depth_error;
+	witness_depth_error = witness_depth_error_intercept;
+	saw_depth_error = false;
 
 	tsdn = tsdn_fetch();
 
 	witness_assert_lockless(tsdn);
+	witness_assert_depth(tsdn, 0);
 
 	witness_init(&a, "a", 1, NULL);
 
-	assert_false(saw_lockless_error, "Unexpected lockless error");
+	assert_false(saw_depth_error, "Unexpected depth error");
 	witness_assert_lockless(tsdn);
+	witness_assert_depth(tsdn, 0);
 
 	witness_lock(tsdn, &a);
 	witness_assert_lockless(tsdn);
-	assert_true(saw_lockless_error, "Expected lockless error");
+	witness_assert_depth(tsdn, 0);
+	assert_true(saw_depth_error, "Expected depth error");
 
 	witness_unlock(tsdn, &a);
 
 	witness_assert_lockless(tsdn);
+	witness_assert_depth(tsdn, 0);
 
-	witness_lockless_error = witness_lockless_error_orig;
+	witness_depth_error = witness_depth_error_orig;
 }
 TEST_END
 
@@ -268,11 +292,11 @@ int
 main(void)
 {
 
-	return (test(
+	return test(
 	    test_witness,
 	    test_witness_comp,
 	    test_witness_reversal,
 	    test_witness_recursive,
 	    test_witness_unlock_not_owned,
-	    test_witness_lockful));
+	    test_witness_depth);
 }
diff --git a/jemalloc-4.4.0/test/unit/zero.c b/jemalloc-4.5.0/test/unit/zero.c
similarity index 91%
rename from jemalloc-4.4.0/test/unit/zero.c
rename to jemalloc-4.5.0/test/unit/zero.c
index 30ebe37..573993a 100644
--- a/jemalloc-4.4.0/test/unit/zero.c
+++ b/jemalloc-4.5.0/test/unit/zero.c
@@ -1,10 +1,5 @@
 #include "test/jemalloc_test.h"
 
-#ifdef JEMALLOC_FILL
-const char *malloc_conf =
-    "abort:false,junk:false,zero:true,redzone:false,quarantine:0";
-#endif
-
 static void
 test_zero(size_t sz_min, size_t sz_max)
 {
diff --git a/jemalloc-4.5.0/test/unit/zero.sh b/jemalloc-4.5.0/test/unit/zero.sh
new file mode 100644
index 0000000..24488f0
--- /dev/null
+++ b/jemalloc-4.5.0/test/unit/zero.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+if [ "x${enable_fill}" = "x1" ] ; then
+  export MALLOC_CONF="abort:false,junk:false,zero:true,redzone:false,quarantine:0"
+fi