Merge branch 'release-2.1.12-stable-pull' into patches-2.1

PR: #1045

* release-2.1.12-stable-pull:
  Update ChangeLog
  ci/linux: create dist artifact only if dist archive was built
  Merge branch 'fix-signal-leak'
  test: fix leak in dns/getaddrinfo_cancel_stress
  test: fix UB in evbuffer/empty_reference_prepend_buffer
  ci: set build type to debug with sanitizers
  test: really disable bufferevent_pair_release_lock under ASAN (and fix gcc)
  test-closed: fix leak
  test-export: adjust libevent version
  cmake: set rpath for libraries on linux
  test-export: compatible with all versions of visual studio
  Bump version to 2.1.12-stable (w/o ABI breakage)
  ci: run ABI for release-*-pull branches too
  Purge travis-ci config
  Purge appveyor config
  Bump ChangeLog for 2.1.12
  Update AUTHORS for 2.1.12
  Backport github actions to 2.1
  test: add getaddrinfo(AI_ADDRCONFIG) test (off by default)
  build: remove duplicate -Wredundant-decls
  test: fix memory leaks for https (add BEV_OPT_CLOSE_ON_FREE)
  test: "fix" (with a quirk) leak in ssl/bufferevent_wm (w/o defer callbacks)
  test: disable bufferevent/bufferevent_pair_release_lock under ASAN (too tricky)
  test: detect test failures if atexit handler calls _exit(!0) (sanitizers)
  Make all classes Entry, Struct, etc) new-style classes
  buffer: do not pass NULL to memcpy() from evbuffer_pullup()
  test: do not pass NULL to memcmp() in evbuffer_datacmp() helper
  http: fix undefined-shift in EVUTIL_IS*_ helpers
  Check error code of evhttp_add_header_internal() in evhttp_parse_query_impl()
  cmake: avoid problems from use of CMAKE_USE_PTHREADS_INIT
  test/regress_testutils: use inet_addr()
  remove FindGit.cmake, improve `git describe` command
  checkpatch.sh: fix clang-format-diff usage
  checkpatch.sh: fix usage
  Fix clang-format-diff usage
  variable redefinition in win32_dispatch
  test: http/autofree_connection cleanup
  http: fix EVHTTP_CON_AUTOFREE in case of timeout (and some else)
  test: cleanup http/autofree_connection
  test: fix http/autofree_connection
  evdns: Add additional validation for values of dns options
  test: Fix test_simpleclose for Windows platform
  abi-check: abi-monitor 1.10 does not support -make -j8 (1.12 supports though)
  Add API/ABI checker (using LVC)
  Update list of cmake files for autotools dist archive
  Pass --quiet to the event_rcpgen.py (autotools already does this)
  There is typo in GetAdaptersAddresses windows library. It should be iphlpapi.dll
  Support EV_CLOSED on linux for poll(2)
  Fix EV_CLOSED detection/reporting (epoll only)
  Merge branch 'EV_CLOSED-and-EV_ET-fixes'
  bufferevent: allow setting priority on socket and openssl type
  cmake: set a default value for LIBEVENT_STATIC_LINK
  evutil_time: improve evutil_gettimeofday on Windows
  bench: Allow backend method selection
  cmake: missing test-closed binary
  Merge branch 'event_rpcgen.py-cleanup'
  cmake: replace CheckFunctionExists with CheckSymbolExists
  LibeventConfig.cmake: restore CMAKE_FIND_LIBRARY_SUFFIXES and LIBEVENT_STATIC_LINK default
  cmake: fix getaddrinfo checking error
  cmake: remove CheckFunctionExistsEx
  autoconf: fix getaddrinfo checking errors on mingw
  test-time: do not use deprecated API
  test-time: enable debug mode if EVENT_DEBUG_LOGGING_ALL env set
  increase segment refcnt only if evbuffer_add_file_segment() succeeds
  evdns: fix a crash when evdns_base with waiting requests is freed
  event_base_once: fix potential null pointer threat
  test-ratelim: add missing free
  Do not use shared global structures on CYGWIN
  test: move thread into realtime class even on EVENT__DISABLE_THREAD_SUPPORT
  test: fix compilation without thread support (EVENT__DISABLE_THREAD_SUPPORT=ON)
  test: fix bufferevent/bufferevent_connect_fail_eventcb* under osx/freebsd
  test: fix dst thread in move_pthread_to_realtime_scheduling_class (osx)
  test: fix compilation under win32 (rearrange thread_setup() code)
  test: use THREAD_* wrappers over pthread* in del_notify
  Merge branch 'osx-clock'
  cmake: do not print used method (EVENT_SHOW_METHOD) while running tests
  cmake: run regress test quietly like autotools (makes CI logs cleaner)
  Merge branch 'http-connect'
  http: do not assume body for CONNECT
  Added uninstall target check to cmakelists
  Fix compilation without OPENSSL_API_COMPAT
  evutil_time: Implements usleep() using wait funtion on Windows
  Initialize variable to 0 replace use memset function in sample/hello-world.c
  cmake: set CMAKE_{RUNTIME,LIBRARY,ARCHIVE}_OUTPUT_DIRECTORY they are not defined
  cmake: use CMAKE_LIBRARY_OUTPUT_DIRECTORY for the final shared library symlink
  test-ratelim: calculate timers bias (for slow CPUs) to avoid false-positive
  mailmap: add name/email aliases for yuangongji (name and email)
  cmake: test for find_package()
  cmake: improve package config file
  Link with iphlpapi only on windows
  Parse IPv6 scope IDs.
  Relax bufferevent_connect_hostname_emfile
  autotools: fails build when need but can not find openssl
  cmake: eliminate duplicate installation of public headers
  append to CMAKE_MODULE_PATH
  Do not use sysctl.h on linux (it had been deprecated)
  sample/https-client: link crypt32 explicitly when build with mingw-w64
  Fix compat with NetBSD >= 10
  Avoid transforming base C_FLAGS set deliberately
  tinytest: support timeout on Windows
  Merge branch 'upstream/pr/899' (evbuffer_freeze testcase enhancements)
  evbuffer_add_file: fix freeing of segment in the error path
  evutil_time: detect and use _gmtime64_s()/_gmtime64()
  http: rename bind_socket_ai() to create_bind_socket_nonblock()
  https-client: load certificates from the system cert store on Windows
  Fix checking return value of the evdns_base_resolv_conf_parse()
  cmake: fix getrandom() detection
  arc4random: replace sysctl() with getrandom (on linux)
  Upgrade autoconf (after upgrading minimum required to 2.67)
  Revert "Warn if forked from the event loop during event_reinit()"
  eliminate some C4267 warnings in Windows
  autotools: attach doxygen target into all target
  cmake: attach doxygen target into all target
  Fix memory corruption in EV_CLOSURE_EVENT_FINALIZE with debug enabled
  test: prevent duplicate event_enable_debug_mode() for TT_ENABLE_DEBUG_MODE
  test: introduce TT_ENABLE_DEBUG_MODE flag
  sample/http-server: fix parameter parsing
  sample/signal-test: fix use of uninitialized variable
  Fix typos in comments (sample/test/event-internal.h)
  sample/signal-test: add NULL checks
  Change the minimum version of automake to 1.13 and autoconf to 2.67
  Add Uninstall.cmake.in into dist archive

.github/workflows/abi.yml

@@ -0,0 +1,42 @@
+---
+name: abi
+
+on:
+  push:
+    branches:
+      - patches-2.1
+      - release-*-pull
+    tags:
+      - release-*
+
+jobs:
+  abi:
+    runs-on: ubuntu-18.04
+    if: "!contains(github.event.head_commit.message, 'ci skip')"
+    strategy:
+      fail-fast: false
+
+    steps:
+      - uses: actions/checkout@v2.0.0
+
+      - name: Install Dependencies
+        run:
+          sudo apt install
+            abi-tracker
+            abi-monitor
+            abi-dumper
+            abi-compliance-checker
+            pkgdiff
+            vtable-dumper
+
+      - name: Generate
+        shell: bash
+        run: |
+          ./extra/abi-check/abi_check.sh
+        env:
+          ABI_CHECK_ROOT: /tmp/le-abi-root
+
+      - uses: actions/upload-artifact@v1
+        with:
+          name: build
+          path: /tmp/le-abi-root/work/abi-check

.github/workflows/linux.yml

@@ -0,0 +1,210 @@
+---
+name: linux
+
+on:
+  pull_request:
+    types: [opened, synchronize]
+    paths-ignore:
+      - '**.md'
+      - '.mailmap'
+      - 'ChangeLog*'
+      - 'whatsnew*'
+      - 'LICENSE'
+  push:
+    paths-ignore:
+      - '**.md'
+      - '.mailmap'
+      - 'ChangeLog*'
+      - 'whatsnew*'
+      - 'LICENSE'
+
+jobs:
+  cmake:
+    runs-on: ${{ matrix.os }}
+    if: "!contains(github.event.head_commit.message, 'ci skip')"
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-18.04]
+        EVENT_MATRIX:
+          - DIST
+          - NONE
+          - DISABLE_OPENSSL
+          - DISABLE_THREAD_SUPPORT
+          - DISABLE_DEBUG_MODE
+          - DISABLE_MM_REPLACEMENT
+          - COMPILER_CLANG
+          - TEST_EXPORT_STATIC
+          - TEST_EXPORT_SHARED
+          - ASAN
+          - TSAN
+          - UBSAN
+
+    steps:
+      - uses: actions/checkout@v2.0.0
+      - name: Cache Build
+        uses: actions/cache@v1.1.0
+        with:
+          path: build
+          key: ${{ matrix.os }}-cmake-${{ matrix.EVENT_MATRIX }}-v2
+      - name: Cache Dist Build
+        uses: actions/cache@v1.1.0
+        with:
+          path: dist
+          key: ${{ matrix.os }}-cmake-dist-${{ matrix.EVENT_MATRIX }}-v2
+
+      - name: Build And Test
+        shell: bash
+        run: |
+          if [ "${{ matrix.EVENT_MATRIX }}" == "DIST" ]; then
+            ./autogen.sh
+            mkdir -p dist
+            cd dist
+            ../configure
+            rm -fr *.tar.gz
+            make dist
+            archive=$(echo *.tar.gz)
+            tar -vxf $archive
+            cd $(basename $archive .tar.gz)
+          fi
+
+          export TSAN_OPTIONS=suppressions=$PWD/extra/tsan.supp
+          export LSAN_OPTIONS=suppressions=$PWD/extra/lsan.supp
+
+          if [ "${{ matrix.EVENT_MATRIX }}" == "DISABLE_OPENSSL" ]; then
+            EVENT_CMAKE_OPTIONS="-DEVENT__DISABLE_OPENSSL=ON"
+          elif [ "${{ matrix.EVENT_MATRIX }}" == "DISABLE_THREAD_SUPPORT" ]; then
+            EVENT_CMAKE_OPTIONS="-DEVENT__DISABLE_THREAD_SUPPORT=ON"
+          elif [ "${{ matrix.EVENT_MATRIX }}" == "DISABLE_DEBUG_MODE" ]; then
+            EVENT_CMAKE_OPTIONS="-DEVENT__DISABLE_DEBUG_MODE=ON"
+          elif [ "${{ matrix.EVENT_MATRIX }}" == "DISABLE_MM_REPLACEMENT" ]; then
+            EVENT_CMAKE_OPTIONS="-DEVENT__DISABLE_MM_REPLACEMENT=ON"
+          elif [ "${{ matrix.EVENT_MATRIX }}" == "COMPILER_CLANG" ]; then
+            EVENT_CMAKE_OPTIONS=""
+            export CC=clang
+          elif [ "${{ matrix.EVENT_MATRIX }}" == "TEST_EXPORT_STATIC" ]; then
+            EVENT_CMAKE_OPTIONS="-DEVENT__LIBRARY_TYPE=STATIC -DEVENT__DISABLE_TESTS=ON -DEVENT__DISABLE_SAMPLES=ON"
+          elif [ "${{ matrix.EVENT_MATRIX }}" == "TEST_EXPORT_SHARED" ]; then
+            EVENT_CMAKE_OPTIONS="-DEVENT__LIBRARY_TYPE=SHARED -DEVENT__DISABLE_TESTS=ON -DEVENT__DISABLE_SAMPLES=ON"
+          elif [ "${{ matrix.EVENT_MATRIX }}" == "ASAN" ]; then
+            EVENT_CMAKE_OPTIONS="-DCMAKE_C_FLAGS=-fsanitize=address -DCMAKE_C_COMPILER=clang -DCMAKE_BUILD_TYPE=debug"
+          elif [ "${{ matrix.EVENT_MATRIX }}" == "TSAN" ]; then
+            EVENT_CMAKE_OPTIONS="-DCMAKE_C_FLAGS=-fsanitize=thread -DCMAKE_C_COMPILER=clang -DCMAKE_BUILD_TYPE=debug"
+          elif [ "${{ matrix.EVENT_MATRIX }}" == "UBSAN" ]; then
+            EVENT_CMAKE_OPTIONS="-DCMAKE_C_FLAGS=-fsanitize=undefined -DCMAKE_C_COMPILER=clang -DCMAKE_BUILD_TYPE=debug"
+          else
+            EVENT_CMAKE_OPTIONS=""
+          fi
+
+          #run build and test
+          JOBS=20
+          export CTEST_PARALLEL_LEVEL=$JOBS
+          export CTEST_OUTPUT_ON_FAILURE=1
+          mkdir -p build
+          cd build
+          echo [cmake]: cmake .. $EVENT_CMAKE_OPTIONS
+          cmake .. $EVENT_CMAKE_OPTIONS || (rm -rf * && cmake .. $EVENT_CMAKE_OPTIONS)
+          cmake --build .
+          if [ "${{ matrix.EVENT_MATRIX }}" == "TEST_EXPORT_STATIC" ]; then
+            sudo python3 ../test-export/test-export.py static
+          elif [ "${{ matrix.EVENT_MATRIX }}" == "TEST_EXPORT_SHARED" ]; then
+            sudo python3 ../test-export/test-export.py shared
+          else
+            cmake --build . --target verify
+          fi
+
+      - uses: actions/upload-artifact@v1
+        if: failure()
+        with:
+          name: ${{ matrix.os }}-cmake-${{ matrix.EVENT_MATRIX }}-build
+          path: build
+      - uses: actions/upload-artifact@v1
+        if: failure() && matrix.EVENT_MATRIX == 'DIST'
+        with:
+          name: ${{ matrix.os }}-cmake-${{ matrix.EVENT_MATRIX }}-dist
+          path: dist
+
+  autotools:
+    runs-on: ${{ matrix.os }}
+    if: "!contains(github.event.head_commit.message, 'ci skip')"
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-18.04]
+        EVENT_MATRIX:
+          - DIST
+          - NONE
+          - DISABLE_OPENSSL
+          - DISABLE_THREAD_SUPPORT
+          - DISABLE_DEBUG_MODE
+          - DISABLE_MM_REPLACEMENT
+          - COMPILER_CLANG
+
+    steps:
+      - uses: actions/checkout@v2.0.0
+      - name: Cache Build
+        uses: actions/cache@v1.1.0
+        with:
+          path: build
+          key: ${{ matrix.os }}-autotools-${{ matrix.EVENT_MATRIX }}-v2
+      - name: Cache Dist Build
+        uses: actions/cache@v1.1.0
+        with:
+          path: dist
+          key: ${{ matrix.os }}-autotools-dist-${{ matrix.EVENT_MATRIX }}-v2
+
+      - name: Build And Test
+        shell: bash
+        run: |
+          if [ "${{ matrix.EVENT_MATRIX }}" == "DISABLE_OPENSSL" ]; then
+            EVENT_CONFIGURE_OPTIONS="--disable-openssl"
+
+          elif [ "${{ matrix.EVENT_MATRIX }}" == "DISABLE_THREAD_SUPPORT" ]; then
+            EVENT_CONFIGURE_OPTIONS="--disable-thread-support"
+
+          elif [ "${{ matrix.EVENT_MATRIX }}" == "DISABLE_DEBUG_MODE" ]; then
+            EVENT_CONFIGURE_OPTIONS="--disable-debug-mode"
+
+          elif [ "${{ matrix.EVENT_MATRIX }}" == "DISABLE_MM_REPLACEMENT" ]; then
+            EVENT_CONFIGURE_OPTIONS="--disable-malloc-replacement"
+
+          elif [ "${{ matrix.EVENT_MATRIX }}" == "COMPILER_CLANG" ]; then
+            EVENT_CONFIGURE_OPTIONS=""
+            export CC=clang
+
+          else
+            EVENT_CONFIGURE_OPTIONS=""
+          fi
+
+          #run build and test
+          JOBS=20
+          ./autogen.sh
+
+          if [ "${{ matrix.EVENT_MATRIX }}" == "DIST" ]; then
+            mkdir -p dist
+            cd dist
+            rm -fr *.tar.gz
+            ../configure $EVENT_CONFIGURE_OPTIONS
+            make dist
+            archive=$(echo *.tar.gz)
+            tar -vxf $archive
+            cd $(basename $archive .tar.gz)
+          fi
+
+          mkdir -p build
+          cd build
+          echo [configure]: ../configure $EVENT_CONFIGURE_OPTIONS
+          ../configure $EVENT_CONFIGURE_OPTIONS
+          make
+          make -j $JOBS verify
+
+      - uses: actions/upload-artifact@v1
+        if: failure()
+        with:
+          name: ${{ matrix.os }}-autotools-${{ matrix.EVENT_MATRIX }}-build
+          path: build
+      - uses: actions/upload-artifact@v1
+        if: failure() && matrix.EVENT_MATRIX == 'DIST'
+        with:
+          name: ${{ matrix.os }}-autotools-${{ matrix.EVENT_MATRIX }}-dist
+          path: dist