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@philnik777 philnik777 force-pushed the exception_remove_cstdlib branch from a76ed12 to 728e585 Compare November 4, 2025 10:25
@philnik777 philnik777 marked this pull request as ready for review November 5, 2025 08:42
@philnik777 philnik777 requested a review from a team as a code owner November 5, 2025 08:42
@philnik777 philnik777 merged commit 988c1b1 into llvm:main Nov 5, 2025
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@philnik777 philnik777 deleted the exception_remove_cstdlib branch November 5, 2025 08:42
@llvmbot llvmbot added the libc++ libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi. label Nov 5, 2025
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llvmbot commented Nov 5, 2025

@llvm/pr-subscribers-libcxx

Author: Nikolas Klauser (philnik777)

Changes

Full diff: https://github.com/llvm/llvm-project/pull/166340.diff

3 Files Affected:

  • (modified) libcxx/include/__exception/exception_ptr.h (+4-3)
  • (modified) libcxx/include/exception (+4-1)
  • (modified) libcxx/test/libcxx/transitive_includes/cxx26.csv (-1)
diff --git a/libcxx/include/__exception/exception_ptr.h b/libcxx/include/__exception/exception_ptr.h
index e78126ea23852..aef036a2c9586 100644
--- a/libcxx/include/__exception/exception_ptr.h
+++ b/libcxx/include/__exception/exception_ptr.h
@@ -11,6 +11,7 @@
 
 #include <__config>
 #include <__cstddef/nullptr_t.h>
+#include <__cstddef/size_t.h>
 #include <__exception/operations.h>
 #include <__memory/addressof.h>
 #include <__memory/construct_at.h>
@@ -18,7 +19,7 @@
 #include <__type_traits/is_pointer.h>
 #include <__utility/move.h>
 #include <__utility/swap.h>
-#include <cstdlib>
+#include <__verbose_abort>
 #include <typeinfo>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -35,7 +36,7 @@ _LIBCPP_PUSH_MACROS
 namespace __cxxabiv1 {
 
 extern "C" {
-_LIBCPP_OVERRIDABLE_FUNC_VIS void* __cxa_allocate_exception(size_t) throw();
+_LIBCPP_OVERRIDABLE_FUNC_VIS void* __cxa_allocate_exception(std::size_t) throw();
 _LIBCPP_OVERRIDABLE_FUNC_VIS void __cxa_free_exception(void*) throw();
 
 struct __cxa_exception;
@@ -174,7 +175,7 @@ _LIBCPP_HIDE_FROM_ABI exception_ptr make_exception_ptr(_Ep __e) _NOEXCEPT {
 #  else  // !_LIBCPP_HAS_EXCEPTIONS
 template <class _Ep>
 _LIBCPP_HIDE_FROM_ABI exception_ptr make_exception_ptr(_Ep) _NOEXCEPT {
-  std::abort();
+  _LIBCPP_VERBOSE_ABORT("make_exception_ptr was called in -fno-exceptions mode");
 }
 #  endif // _LIBCPP_HAS_EXCEPTIONS
 
diff --git a/libcxx/include/exception b/libcxx/include/exception
index 74229cd16c006..0b2372e571e99 100644
--- a/libcxx/include/exception
+++ b/libcxx/include/exception
@@ -93,10 +93,13 @@ template <class E> void rethrow_if_nested(const E& e);
 
 #  if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
 #    include <cstddef>
-#    include <cstdlib>
 #    include <new>
 #    include <type_traits>
 #  endif
+
+#  if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 23
+#    include <cstdlib>
+#  endif
 #endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_EXCEPTION
diff --git a/libcxx/test/libcxx/transitive_includes/cxx26.csv b/libcxx/test/libcxx/transitive_includes/cxx26.csv
index d047b29b63cc6..8c3e1f0a97dfe 100644
--- a/libcxx/test/libcxx/transitive_includes/cxx26.csv
+++ b/libcxx/test/libcxx/transitive_includes/cxx26.csv
@@ -245,7 +245,6 @@ deque stdexcept
 deque tuple
 deque version
 exception cstdint
-exception cstdlib
 exception typeinfo
 exception version
 execution version

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llvm-ci commented Nov 5, 2025

LLVM Buildbot has detected a new failure on builder sanitizer-aarch64-linux-bootstrap-asan running on sanitizer-buildbot8 while building libcxx at step 2 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/24/builds/14379

Here is the relevant piece of the build log for the reference
Step 2 (annotate) failure: 'python ../sanitizer_buildbot/sanitizers/zorg/buildbot/builders/sanitizers/buildbot_selector.py' (failure)
...
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:531: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:531: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:531: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:531: note: using ld.lld: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/ld.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:531: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:531: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:531: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/main.py:74: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 900 seconds was requested on the command line. Forcing timeout to be 900 seconds.
-- Testing: 92173 tests, 72 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 
FAIL: LLVM :: ExecutionEngine/JITLink/x86-64/MachO_weak_references.s (56065 of 92173)
******************** TEST 'LLVM :: ExecutionEngine/JITLink/x86-64/MachO_weak_references.s' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 1
rm -rf /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/test/ExecutionEngine/JITLink/x86-64/Output/MachO_weak_references.s.tmp && mkdir -p /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/test/ExecutionEngine/JITLink/x86-64/Output/MachO_weak_references.s.tmp
# executed command: rm -rf /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/test/ExecutionEngine/JITLink/x86-64/Output/MachO_weak_references.s.tmp
# note: command had no output on stdout or stderr
# executed command: mkdir -p /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/test/ExecutionEngine/JITLink/x86-64/Output/MachO_weak_references.s.tmp
# note: command had no output on stdout or stderr
# RUN: at line 2
/home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/llvm-mc -triple=x86_64-apple-macosx10.9 -filetype=obj -o /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/test/ExecutionEngine/JITLink/x86-64/Output/MachO_weak_references.s.tmp/macho_weak_refs.o /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/test/ExecutionEngine/JITLink/x86-64/MachO_weak_references.s
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/llvm-mc -triple=x86_64-apple-macosx10.9 -filetype=obj -o /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/test/ExecutionEngine/JITLink/x86-64/Output/MachO_weak_references.s.tmp/macho_weak_refs.o /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/test/ExecutionEngine/JITLink/x86-64/MachO_weak_references.s
# note: command had no output on stdout or stderr
# RUN: at line 3
/home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/llvm-jitlink -noexec -check-name=jitlink-check-bar-present -abs bar=0x1 -check=/home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/test/ExecutionEngine/JITLink/x86-64/MachO_weak_references.s /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/test/ExecutionEngine/JITLink/x86-64/Output/MachO_weak_references.s.tmp/macho_weak_refs.o
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/llvm-jitlink -noexec -check-name=jitlink-check-bar-present -abs bar=0x1 -check=/home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/test/ExecutionEngine/JITLink/x86-64/MachO_weak_references.s /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/test/ExecutionEngine/JITLink/x86-64/Output/MachO_weak_references.s.tmp/macho_weak_refs.o
# note: command had no output on stdout or stderr
# RUN: at line 4
/home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/llvm-jitlink -noexec -check-name=jitlink-check-bar-absent -check=/home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/test/ExecutionEngine/JITLink/x86-64/MachO_weak_references.s /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/test/ExecutionEngine/JITLink/x86-64/Output/MachO_weak_references.s.tmp/macho_weak_refs.o
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/llvm-jitlink -noexec -check-name=jitlink-check-bar-absent -check=/home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/test/ExecutionEngine/JITLink/x86-64/MachO_weak_references.s /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/test/ExecutionEngine/JITLink/x86-64/Output/MachO_weak_references.s.tmp/macho_weak_refs.o
# note: command had no output on stdout or stderr
# error: command failed with exit status: 1

--

********************
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90.. 
Slowest Tests:
--------------------------------------------------------------------------
203.67s: Clang :: Driver/fsanitize.c
149.09s: Clang :: Preprocessor/riscv-target-features.c
130.50s: Clang :: Driver/arm-cortex-cpus-1.c
129.62s: Clang :: Driver/arm-cortex-cpus-2.c
123.95s: Clang :: OpenMP/target_defaultmap_codegen_01.cpp
119.71s: Clang :: OpenMP/target_update_codegen.cpp
111.61s: Clang :: Preprocessor/arm-target-features.c
Step 11 (stage2/asan check) failure: stage2/asan check (failure)
...
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:531: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:531: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:531: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:531: note: using ld.lld: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/ld.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:531: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:531: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:531: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/main.py:74: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 900 seconds was requested on the command line. Forcing timeout to be 900 seconds.
-- Testing: 92173 tests, 72 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 
FAIL: LLVM :: ExecutionEngine/JITLink/x86-64/MachO_weak_references.s (56065 of 92173)
******************** TEST 'LLVM :: ExecutionEngine/JITLink/x86-64/MachO_weak_references.s' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 1
rm -rf /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/test/ExecutionEngine/JITLink/x86-64/Output/MachO_weak_references.s.tmp && mkdir -p /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/test/ExecutionEngine/JITLink/x86-64/Output/MachO_weak_references.s.tmp
# executed command: rm -rf /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/test/ExecutionEngine/JITLink/x86-64/Output/MachO_weak_references.s.tmp
# note: command had no output on stdout or stderr
# executed command: mkdir -p /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/test/ExecutionEngine/JITLink/x86-64/Output/MachO_weak_references.s.tmp
# note: command had no output on stdout or stderr
# RUN: at line 2
/home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/llvm-mc -triple=x86_64-apple-macosx10.9 -filetype=obj -o /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/test/ExecutionEngine/JITLink/x86-64/Output/MachO_weak_references.s.tmp/macho_weak_refs.o /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/test/ExecutionEngine/JITLink/x86-64/MachO_weak_references.s
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/llvm-mc -triple=x86_64-apple-macosx10.9 -filetype=obj -o /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/test/ExecutionEngine/JITLink/x86-64/Output/MachO_weak_references.s.tmp/macho_weak_refs.o /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/test/ExecutionEngine/JITLink/x86-64/MachO_weak_references.s
# note: command had no output on stdout or stderr
# RUN: at line 3
/home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/llvm-jitlink -noexec -check-name=jitlink-check-bar-present -abs bar=0x1 -check=/home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/test/ExecutionEngine/JITLink/x86-64/MachO_weak_references.s /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/test/ExecutionEngine/JITLink/x86-64/Output/MachO_weak_references.s.tmp/macho_weak_refs.o
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/llvm-jitlink -noexec -check-name=jitlink-check-bar-present -abs bar=0x1 -check=/home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/test/ExecutionEngine/JITLink/x86-64/MachO_weak_references.s /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/test/ExecutionEngine/JITLink/x86-64/Output/MachO_weak_references.s.tmp/macho_weak_refs.o
# note: command had no output on stdout or stderr
# RUN: at line 4
/home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/llvm-jitlink -noexec -check-name=jitlink-check-bar-absent -check=/home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/test/ExecutionEngine/JITLink/x86-64/MachO_weak_references.s /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/test/ExecutionEngine/JITLink/x86-64/Output/MachO_weak_references.s.tmp/macho_weak_refs.o
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/bin/llvm-jitlink -noexec -check-name=jitlink-check-bar-absent -check=/home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm-project/llvm/test/ExecutionEngine/JITLink/x86-64/MachO_weak_references.s /home/b/sanitizer-aarch64-linux-bootstrap-asan/build/llvm_build_asan/test/ExecutionEngine/JITLink/x86-64/Output/MachO_weak_references.s.tmp/macho_weak_refs.o
# note: command had no output on stdout or stderr
# error: command failed with exit status: 1

--

********************
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90.. 
Slowest Tests:
--------------------------------------------------------------------------
203.67s: Clang :: Driver/fsanitize.c
149.09s: Clang :: Preprocessor/riscv-target-features.c
130.50s: Clang :: Driver/arm-cortex-cpus-1.c
129.62s: Clang :: Driver/arm-cortex-cpus-2.c
123.95s: Clang :: OpenMP/target_defaultmap_codegen_01.cpp
119.71s: Clang :: OpenMP/target_update_codegen.cpp
111.61s: Clang :: Preprocessor/arm-target-features.c

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