Switch from libunwind to boost::stacktrace
This commit is contained in:
Sebastian Messmer
parent
62862933e2
commit
276e7f08e4
@ -86,60 +86,16 @@ references:
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cmake --version
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/usr/local/bin/$CC --version
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/usr/local/bin/$CXX --version
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upgrade_libunwind_pre: &upgrade_libunwind_pre
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restore_cache:
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keys:
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# Find the most recent cache from any branch
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- v1_upgrade_libunwind_cache_{{ checksum "/tmp/_build_env_vars" }}_{{ arch }}
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upgrade_libunwind_post: &upgrade_libunwind_post
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save_cache:
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key: v1_upgrade_libunwind_cache_{{ checksum "/tmp/_build_env_vars" }}_{{ arch }}
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paths:
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- /tmp/libunwind-1.2.1
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upgrade_libunwind: &upgrade_libunwind
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run:
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name: Upgrade Libunwind
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command: |
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# We need to install libunwind manually because Circle CI uses Ubuntu 14.04 and the default libunwind version
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# on that Ubuntu suffers from http://savannah.nongnu.org/bugs/?43752.
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# This isn't an issue for any later version of Ubuntu.
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# Detect number of CPU cores
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export NUMCORES=`nproc`
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echo Using $NUMCORES cores
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# Download and prepare libunwind (only if not already present from cache)
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if [ ! -d "/tmp/libunwind-1.2.1" ]; then
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echo "Didn't find libunwind in cache. Downloading and building."
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wget -O /tmp/libunwind-1.2.1.tar.gz http://download.savannah.nongnu.org/releases/libunwind/libunwind-1.2.1.tar.gz
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if [ $(sha512sum /tmp/libunwind-1.2.1.tar.gz | awk '{print $1;}') == "af7c280d2a963779a4a2711887618bc96383011e4e5d52e4085aa7fb351e55e357468f6ff85e66a216f1c6826538f498335a917a5970575c93be74c96316319b" ]; then
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echo Correct sha512sum
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else
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echo Wrong sha512sum
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sha512sum /tmp/libunwind-1.2.1.tar.gz
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exit 1
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fi
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echo Extracting...
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tar -xf /tmp/libunwind-1.2.1.tar.gz -C /tmp
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rm -rf /tmp/libunwind-1.2.1.tar.gz
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cd /tmp/libunwind-1.2.1
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./configure
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make -j${NUMCORES}
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else
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echo Found libunwind in cache. Use cache and build.
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fi
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# Compile and install libunwind (if cached, this should be fast)
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cd /tmp/libunwind-1.2.1
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sudo make -j${NUMCORES} install
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upgrade_boost_pre: &upgrade_boost_pre
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restore_cache:
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keys:
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# Find the most recent cache from any branch
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- v3_upgrade_boost_cache_{{ checksum "/tmp/_build_env_vars" }}_{{ arch }}
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- v4_upgrade_boost_cache_{{ checksum "/tmp/_build_env_vars" }}_{{ arch }}
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upgrade_boost_post: &upgrade_boost_post
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save_cache:
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key: v3_upgrade_boost_cache_{{ checksum "/tmp/_build_env_vars" }}_{{ arch }}
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key: v4_upgrade_boost_cache_{{ checksum "/tmp/_build_env_vars" }}_{{ arch }}
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paths:
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- /tmp/boost_1_57_0
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- /tmp/boost_1_65_1
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upgrade_boost: &upgrade_boost
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run:
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name: Upgrade Boost
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@ -148,10 +104,10 @@ references:
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export NUMCORES=`nproc`
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echo Using $NUMCORES cores
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# Download and prepare boost (only if not already present from cache)
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if [ ! -d "/tmp/boost_1_57_0" ]; then
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if [ ! -d "/tmp/boost_1_65_1" ]; then
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echo "Didn't find boost in cache. Downloading and building."
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wget -O /tmp/boost.tar.bz2 https://sourceforge.net/projects/boost/files/boost/1.57.0/boost_1_57_0.tar.bz2/download
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if [ $(sha512sum /tmp/boost.tar.bz2 | awk '{print $1;}') == "61881440fd89644c43c6e3bc6292e9fed75a6d3a76f98654b189d0ed4e1087d77b585884e882270c08bf9f7132b173bfc1fde05848e06aa78ba7f1008d10714d" ]; then
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wget -O /tmp/boost.tar.bz2 https://sourceforge.net/projects/boost/files/boost/1.65.1/boost_1_65_1.tar.bz2/download
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if [ $(sha512sum /tmp/boost.tar.bz2 | awk '{print $1;}') == "a9e6866d3bb3e7c198f442ff09f5322f58064dca79bc420f2f0168eb63964226dfbc4f034a5a5e5958281fdf7518a1b057c894fbda0b61fced59c1661bf30f1a" ]; then
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echo Correct sha512sum
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else
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echo Wrong sha512sum
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@ -161,14 +117,14 @@ references:
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echo Extracting...
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tar -xf /tmp/boost.tar.bz2 -C /tmp
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rm -rf boost.tar.bz2
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cd /tmp/boost_1_57_0
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cd /tmp/boost_1_65_1
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./bootstrap.sh --with-toolset=${BUILD_TOOLSET} --with-libraries=filesystem,thread,chrono,program_options
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cd ..
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else
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echo Found boost in cache. Use cache and build.
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fi
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# Compile and install boost (if cached, this should be fast)
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cd /tmp/boost_1_57_0
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cd /tmp/boost_1_65_1
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sudo ./b2 toolset=${BUILD_TOOLSET} link=static cxxflags=-fPIC -d0 -j$NUMCORES install
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build_pre: &build_pre
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restore_cache:
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@ -233,9 +189,6 @@ references:
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- <<: *container_setup_pre
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- <<: *container_setup
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- <<: *container_setup_post
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- <<: *upgrade_libunwind_pre
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- <<: *upgrade_libunwind
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- <<: *upgrade_libunwind_post
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- <<: *upgrade_boost_pre
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- <<: *upgrade_boost
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- <<: *upgrade_boost_post
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@ -514,7 +467,7 @@ jobs:
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OMP_NUM_THREADS: "1"
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CXXFLAGS: "-O2 -fsanitize=thread -fno-omit-frame-pointer"
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BUILD_TYPE: "Debug"
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GTEST_ARGS: "--gtest_filter=-LoggingTest.LoggingAlsoWorksAfterFork:AssertTest_DebugBuild.*:SignalCatcherTest.*_thenDies:SignalHandlerTest.*_thenDies:SignalHandlerTest.givenMultipleSigIntHandlers_whenRaising_thenCatchesCorrectSignal:CliTest_Setup.*:CliTest_IntegrityCheck.*:*/CliTest_WrongEnvironment.*:CliTest_Unmount.*"
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GTEST_ARGS: "--gtest_filter=-LoggingTest.LoggingAlsoWorksAfterFork:AssertTest_*:BacktraceTest.*:SignalCatcherTest.*_thenDies:SignalHandlerTest.*_thenDies:SignalHandlerTest.givenMultipleSigIntHandlers_whenRaising_thenCatchesCorrectSignal:CliTest_Setup.*:CliTest_IntegrityCheck.*:*/CliTest_WrongEnvironment.*:CliTest_Unmount.*"
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CMAKE_FLAGS: ""
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RUN_TESTS: true
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clang_tidy:
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@ -524,9 +477,6 @@ jobs:
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- <<: *container_setup_pre
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- <<: *container_setup
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- <<: *container_setup_post
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- <<: *upgrade_libunwind_pre
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- <<: *upgrade_libunwind
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- <<: *upgrade_libunwind_post
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- <<: *upgrade_boost_pre
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- <<: *upgrade_boost
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- <<: *upgrade_boost_post
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@ -7,7 +7,7 @@ Fixed bugs:
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Compatibility:
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* Fixed some incompatibilities with systems using the musl libc
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* Use libunwind instead of libbacktrace to build stack traces. This fixes a segfault issue with platforms using libexecinfo and is generally more portable.
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* Use boost::stacktrace instead of libbacktrace to build stack traces. This fixes a segfault issue with platforms using libexecinfo and is generally more portable.
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Other:
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* Updated to crypto++ 8.1
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@ -46,7 +46,7 @@ Requirements
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- GCC version >= 5.0 or Clang >= 4.0
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- CMake version >= 3.0
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- libcurl4 (including development headers)
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- Boost libraries version >= 1.57 (including development headers)
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- Boost libraries version >= 1.65.1 (including development headers)
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- filesystem
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- system
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- chrono
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@ -56,15 +56,14 @@ Requirements
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- libFUSE version >= 2.8.6 (including development headers), on Mac OS X instead install osxfuse from https://osxfuse.github.io/
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- Python >= 2.7
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- OpenMP
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- Libunwind
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You can use the following commands to install these requirements
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# Ubuntu
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$ sudo apt install git g++ cmake make libcurl4-openssl-dev libboost-filesystem-dev libboost-system-dev libboost-chrono-dev libboost-program-options-dev libboost-thread-dev libssl-dev libfuse-dev python libunwind-dev
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$ sudo apt install git g++ cmake make libcurl4-openssl-dev libboost-filesystem-dev libboost-system-dev libboost-chrono-dev libboost-program-options-dev libboost-thread-dev libssl-dev libfuse-dev python
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# Fedora
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sudo dnf install git gcc-c++ cmake make libcurl-devel boost-devel boost-static openssl-devel fuse-devel python libunwind-devel
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sudo dnf install git gcc-c++ cmake make libcurl-devel boost-devel boost-static openssl-devel fuse-devel python
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# Macintosh
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brew install cmake boost openssl libomp
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@ -108,7 +108,7 @@ endfunction(target_enable_style_warnings)
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function(target_add_boost TARGET)
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# Load boost libraries
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if(NOT DEFINED Boost_USE_STATIC_LIBS OR Boost_USE_STATIC_LIBS)
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# Many supported systems don't have boost >= 1.57. Better link it statically.
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# Many supported systems don't have boost >= 1.65.1. Better link it statically.
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message(STATUS "Boost will be statically linked")
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set(Boost_USE_STATIC_LIBS ON)
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else(NOT DEFINED Boost_USE_STATIC_LIBS OR Boost_USE_STATIC_LIBS)
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@ -116,7 +116,7 @@ function(target_add_boost TARGET)
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set(Boost_USE_STATIC_LIBS OFF)
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endif(NOT DEFINED Boost_USE_STATIC_LIBS OR Boost_USE_STATIC_LIBS)
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set(BOOST_THREAD_VERSION 4)
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find_package(Boost 1.57.0
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find_package(Boost 1.65.1
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REQUIRED
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COMPONENTS ${ARGN})
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target_include_directories(${TARGET} SYSTEM PUBLIC ${Boost_INCLUDE_DIRS})
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@ -63,12 +63,17 @@ add_library(${PROJECT_NAME} STATIC ${SOURCES})
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if(MSVC)
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target_link_libraries(${PROJECT_NAME} PUBLIC DbgHelp)
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elseif(NOT APPLE)
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# note: We use the libunwind code on Apple, but we don't seem to need these lines to link against it.
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find_package(Libunwind REQUIRED)
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target_include_directories(${PROJECT_NAME} PRIVATE ${LIBUNWIND_INCLUDE_DIR})
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target_link_libraries(${PROJECT_NAME} PRIVATE ${LIBUNWIND_LIBRARIES})
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target_compile_definitions(${PROJECT_NAME} PRIVATE ${LIBUNWIND_DEFINITIONS})
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elseif (APPLE)
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target_compile_definitions(${PROJECT_NAME} PRIVATE BOOST_STACKTRACE_GNU_SOURCE_NOT_REQUIRED)
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else()
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find_program(ADDR2LINE addr2line)
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if ("${ADDR2LINE}" STREQUAL "ADDR2LINE-NOTFOUND")
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message(WARNING "addr2line not found. Backtraces will be reduced.")
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else()
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message(STATUS "addr2line found. Using it for backtraces.")
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target_compile_definitions(${PROJECT_NAME} PRIVATE BOOST_STACKTRACE_USE_ADDR2LINE)
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target_compile_definitions(${PROJECT_NAME} PRIVATE BOOST_STACKTRACE_ADDR2LINE_LOCATION=${ADDR2LINE})
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endif()
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endif()
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if (NOT MSVC)
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@ -1,16 +1,12 @@
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#if !defined(_MSC_VER)
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#include <csignal>
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#include <cxxabi.h>
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#include <sstream>
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#include "../logging/logging.h"
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#include <cpp-utils/process/SignalHandler.h>
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#define UNW_LOCAL_ONLY
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#include <libunwind.h>
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// TODO Add file and line number on non-windows
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#include <boost/stacktrace.hpp>
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using std::string;
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using std::ostringstream;
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@ -18,105 +14,36 @@ using namespace cpputils::logging;
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namespace cpputils {
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namespace {
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std::string demangle(const string &mangledName) {
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string result;
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int status = -10;
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char *demangledName = nullptr;
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try {
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demangledName = abi::__cxa_demangle(mangledName.c_str(), NULL, NULL, &status);
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if (status == 0) {
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result = demangledName;
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} else if (status == -2) {
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// mangledName was not a c++ mangled name, probably because it's a C name like for static
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// initialization or stuff. Let's just return the name instead.
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result = mangledName;
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} else {
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// other error
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result = "[demangling error " + std::to_string(status) + "]" + mangledName;
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}
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free(demangledName);
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return result;
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} catch (...) {
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free(demangledName);
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throw;
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}
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}
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void pretty_print(std::ostringstream& str, unw_cursor_t* cursor) {
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constexpr unsigned int MAXNAMELEN=256;
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char name[MAXNAMELEN];
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unw_word_t offp = 0, ip = 0;
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int status = unw_get_reg(cursor, UNW_REG_IP, &ip);
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if (0 != status) {
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str << "[unw_get_reg error: " << status << "]: ";
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} else {
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str << "0x" << std::hex << ip << ": ";
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}
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status = unw_get_proc_name(cursor, name, MAXNAMELEN, &offp);
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if (0 != status) {
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str << "[unw_get_proc_name error: " << status << "]";
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} else {
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str << demangle(name);
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}
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str << " +0x" << std::hex << offp;
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}
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string backtrace() {
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std::ostringstream str;
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str << boost::stacktrace::stacktrace();
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return str.str();
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}
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string backtrace() {
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std::ostringstream result;
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unw_context_t uc;
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int status = unw_getcontext(&uc);
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if (0 != status) {
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return "[unw_getcontext error: " + std::to_string(status) + "]";
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}
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unw_cursor_t cursor;
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status = unw_init_local(&cursor, &uc);
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if (0 != status) {
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return "[unw_init_local error: " + std::to_string(status) + "]";
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}
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size_t line = 0;
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while ((status = unw_step(&cursor)) > 0) {
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result << "#" << std::dec << (line++) << " ";
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pretty_print(result, &cursor);
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result << "\n";
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}
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if (status != 0) {
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result << "[unw_step error :" << status << "]";
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}
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return result.str();
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}
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namespace {
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void sigsegv_handler(int) {
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LOG(ERR, "SIGSEGV\n{}", backtrace());
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exit(1);
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}
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void sigill_handler(int) {
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LOG(ERR, "SIGILL\n{}", backtrace());
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exit(1);
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}
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void sigabrt_handler(int) {
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LOG(ERR, "SIGABRT\n{}", backtrace());
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exit(1);
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}
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void sigsegv_handler(int) {
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LOG(ERR, "SIGSEGV\n{}", backtrace());
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exit(1);
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}
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void sigill_handler(int) {
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LOG(ERR, "SIGILL\n{}", backtrace());
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exit(1);
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}
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void sigabrt_handler(int) {
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LOG(ERR, "SIGABRT\n{}", backtrace());
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exit(1);
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}
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}
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void showBacktraceOnCrash() {
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// the signal handler RAII objects will be initialized on first call (which will register the signal handler)
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// and destroyed on program exit (which will unregister the signal handler)
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void showBacktraceOnCrash() {
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// the signal handler RAII objects will be initialized on first call (which will register the signal handler)
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// and destroyed on program exit (which will unregister the signal handler)
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static SignalHandlerRAII<&sigsegv_handler> segv(SIGSEGV);
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static SignalHandlerRAII<&sigabrt_handler> abrt(SIGABRT);
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static SignalHandlerRAII<&sigill_handler> ill(SIGILL);
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}
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static SignalHandlerRAII<&sigsegv_handler> segv(SIGSEGV);
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static SignalHandlerRAII<&sigabrt_handler> abrt(SIGABRT);
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static SignalHandlerRAII<&sigill_handler> ill(SIGILL);
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}
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}
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#endif
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@ -1,66 +1 @@
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#include "SignalHandler.h"
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#if !defined(_MSC_VER)
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namespace cpputils {
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namespace detail {
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namespace {
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std::atomic<bool> already_checked_for_libunwind_bug(false);
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}
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sigset_t _sigemptyset() {
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sigset_t result;
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int error = sigemptyset(&result);
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if (0 != error) {
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throw std::runtime_error("Error calling sigemptyset. Errno: " + std::to_string(errno));
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}
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return result;
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}
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void _sigmask(sigset_t* new_value, sigset_t* old_value) {
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int error = pthread_sigmask(SIG_SETMASK, new_value, old_value);
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if (0 != error) {
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throw std::runtime_error("Error calling pthread_sigmask. Errno: " + std::to_string(errno));
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}
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}
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// Check that we're not running into http://savannah.nongnu.org/bugs/?43752
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void check_against_libunwind_bug() {
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if (already_checked_for_libunwind_bug.exchange(true)) {
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return;
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}
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// set new signal handler
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sigset_t old_value = _sigemptyset();
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sigset_t new_value = _sigemptyset();
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_sigmask(&new_value, &old_value);
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sigset_t before_exception = _sigemptyset();
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_sigmask(nullptr, &before_exception);
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// throw an exception
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try {
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throw std::runtime_error("Some exception");
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} catch (const std::exception &e) {}
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sigset_t after_exception = _sigemptyset();
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_sigmask(nullptr, &after_exception);
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// reset to old signal handler
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_sigmask(&old_value, nullptr);
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// check that the exception didn't screw up the signal mask
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if (0 != std::memcmp(&before_exception, &after_exception, sizeof(sigset_t))) { // NOLINT(cppcoreguidelines-pro-type-union-access)
|
||||
ASSERT(false,
|
||||
"Throwing an exception screwed up the signal mask. You likely ran into this bug: http://savannah.nongnu.org/bugs/?43752 . Please build CryFS against a newer version of libunwind or build libunwind with --disable-cxx-exceptions.");
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
@ -20,17 +20,11 @@ using SignalHandlerFunction = void(int);
|
||||
|
||||
#if !defined(_MSC_VER)
|
||||
|
||||
namespace detail {
|
||||
void check_against_libunwind_bug();
|
||||
}
|
||||
|
||||
template<SignalHandlerFunction* handler>
|
||||
class SignalHandlerRAII final {
|
||||
public:
|
||||
explicit SignalHandlerRAII(int signal)
|
||||
: _old_handler(), _signal(signal) {
|
||||
detail::check_against_libunwind_bug();
|
||||
|
||||
struct sigaction new_signal_handler{};
|
||||
std::memset(&new_signal_handler, 0, sizeof(new_signal_handler));
|
||||
new_signal_handler.sa_handler = handler; // NOLINT(cppcoreguidelines-pro-type-union-access)
|
||||
|
||||
@ -25,12 +25,8 @@ namespace {
|
||||
}
|
||||
}
|
||||
|
||||
TEST(BacktraceTest, ContainsBacktrace) {
|
||||
string backtrace = cpputils::backtrace();
|
||||
EXPECT_THAT(backtrace, HasSubstr("#1"));
|
||||
}
|
||||
|
||||
#if !(defined(_MSC_VER) && defined(NDEBUG))
|
||||
|
||||
TEST(BacktraceTest, ContainsTopLevelLine) {
|
||||
string backtrace = cpputils::backtrace();
|
||||
EXPECT_THAT(backtrace, HasSubstr("BacktraceTest"));
|
||||
@ -85,12 +81,21 @@ TEST(BacktraceTest, DoesntCrashOnCaughtException) {
|
||||
}
|
||||
|
||||
#if !(defined(_MSC_VER) && defined(NDEBUG))
|
||||
TEST(BacktraceTest, ContainsBacktrace) {
|
||||
string backtrace = cpputils::backtrace();
|
||||
#if defined(_MSC_VER)
|
||||
EXPECT_THAT(backtrace, HasSubstr("testing::Test::Run"));
|
||||
#else
|
||||
EXPECT_THAT(backtrace, HasSubstr("BacktraceTest_ContainsBacktrace_Test::TestBody"));
|
||||
#endif
|
||||
}
|
||||
|
||||
TEST(BacktraceTest, ShowBacktraceOnNullptrAccess) {
|
||||
auto output = call_process_exiting_with_nullptr_violation();
|
||||
#if !defined(_MSC_VER)
|
||||
EXPECT_THAT(output, HasSubstr("cpputils::(anonymous namespace)::sig"));
|
||||
#else
|
||||
#if defined(_MSC_VER)
|
||||
EXPECT_THAT(output, HasSubstr("handle_exit_signal"));
|
||||
#else
|
||||
EXPECT_THAT(output, HasSubstr("cpputils::backtrace"));
|
||||
#endif
|
||||
}
|
||||
|
||||
@ -99,7 +104,7 @@ TEST(BacktraceTest, ShowBacktraceOnSigSegv) {
|
||||
#if defined(_MSC_VER)
|
||||
EXPECT_THAT(output, HasSubstr("handle_exit_signal"));
|
||||
#else
|
||||
EXPECT_THAT(output, HasSubstr("cpputils::(anonymous namespace)::sigsegv_handler(int)"));
|
||||
EXPECT_THAT(output, HasSubstr("cpputils::backtrace"));
|
||||
#endif
|
||||
}
|
||||
|
||||
@ -108,19 +113,23 @@ TEST(BacktraceTest, ShowBacktraceOnUnhandledException) {
|
||||
#if defined(_MSC_VER)
|
||||
EXPECT_THAT(output, HasSubstr("handle_exit_signal"));
|
||||
#else
|
||||
EXPECT_THAT(output, HasSubstr("cpputils::(anonymous namespace)::sigabrt_handler(int)"));
|
||||
EXPECT_THAT(output, HasSubstr("cpputils::backtrace"));
|
||||
#endif
|
||||
}
|
||||
|
||||
TEST(BacktraceTest, ShowBacktraceOnSigIll) {
|
||||
auto output = call_process_exiting_with_sigill();
|
||||
#if defined(_MSC_VER)
|
||||
EXPECT_THAT(output, HasSubstr("handle_exit_signal"));
|
||||
EXPECT_THAT(output, HasSubstr("handle_exit_signal"));
|
||||
#else
|
||||
EXPECT_THAT(output, HasSubstr("cpputils::(anonymous namespace)::sigill_handler(int)"));
|
||||
EXPECT_THAT(output, HasSubstr("cpputils::backtrace"));
|
||||
#endif
|
||||
}
|
||||
#else
|
||||
TEST(BacktraceTest, ContainsBacktrace) {
|
||||
string backtrace = cpputils::backtrace();
|
||||
EXPECT_THAT(backtrace, HasSubstr("#1"));
|
||||
}
|
||||
TEST(BacktraceTest, ShowBacktraceOnNullptrAccess) {
|
||||
auto output = call_process_exiting_with_nullptr_violation();
|
||||
EXPECT_THAT(output, HasSubstr("#1"));
|
||||
@ -145,7 +154,7 @@ TEST(BacktraceTest, ShowBacktraceOnSigIll) {
|
||||
#if !defined(_MSC_VER)
|
||||
TEST(BacktraceTest, ShowBacktraceOnSigAbrt) {
|
||||
auto output = call_process_exiting_with_sigabrt();
|
||||
EXPECT_THAT(output, HasSubstr("cpputils::(anonymous namespace)::sigabrt_handler(int)"));
|
||||
EXPECT_THAT(output, HasSubstr("cpputils::backtrace"));
|
||||
}
|
||||
|
||||
TEST(BacktraceTest, ShowBacktraceOnSigAbrt_ShowsCorrectSignalName) {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user