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Wholearchive windows cmake6/30/2023 ![]() Pass the -fsanitize-memory-track-origins flag to enable this functionality. MSan can track back the origins of an uninitialized value to where it was created and report this information. MSan is only available in Clang for Linux x86_64 targets. MSan is also capable of tracking uninitialized bits in a bitfield. This Sanitizer finds the cases when stack- or heap-allocated memory is read before it is written. MemorySanitizer (MSan) is a detector of uninitialized memory reads. To make a program exit due to UBSan's diagnostics, use the -fno-sanitize-recover option. If you compile this code with the -fsanitize=undefined flag (alternatively, use -fsanitize=shift) and launch, the program will finish successfully despite of the UBSan warning: You can turn the checks on one by one, or use flags for check groups -fsanitize=undefined, -fsanitize=integer, and -fsanitize=nullability.Ĭode below illustrates the situation of an undefined result of a shift operation: UBSan catches various kinds of undefined behavior, see the full list at. UndefinedBehaviorSanitizer (UBSan) is a runtime checker for undefined behavior, which is a result of any operation with unspecified semantics, such as dividing by zero, null pointer dereference, or usage of an uninitialized non-static variable. When you run this program compiled with -fsanitize=thread -fPIE -pie -g, TSan prints a report of a data race (refer to ThreadSanitizerReportFormat for details of the output format): UndefinedBehaviourSanitizer The following code leads to a memory leak due to no-deleting of a heap-allocated object: To run LSan only (and avoid the ASan's slowdown), use -fsanitize=leak instead of -fsanitize=address. To run ASan-instrumented program without leak detection, set detect_leaks=0. To enable LeakSanitizer as a part of AddressSanitizer, pass detect_leaks=1 to the ASAN_OPTIONS variable. ![]() Learn more about LSan: Design Document, LSan in Clang. However, LSan is also integrated into AddressSanitizer, so you can combine them to get both memory errors and leak detection. In a stand-alone mode, this Sanitizer is a run-time tool that does not require compiler instrumentation. ![]() LeakSanitizer (LSan) is a memory leak detector. It took forever to stumble across this technique, so I'm sharing it.Set(CMAKE_CXX_FLAGS "$/Microsoft Visual Studio/2019/Professional/VC/Tools/Llvm/圆4/lib/clang/10.0.0/lib/windows into the cmake-build-release folder. Now when I create an executable or a shared library by linking against this souce-combined library, I get the -whole-archive and -no-whole-archive as bookends around the entire set of static libraries that were the link dependencies of 'source'. Target_link_libraries(source-combined PUBLIC Set_target_properties(source-combined PROPERTIES LINKER_LANGUAGE CXX) I created 'source-combined' as follows: add_library(source-combined STATIC "") It contained actually nothing itself, but had linkage dependencies on a bunch of other static libraries. For me, the top-level static library was called 'source'. The workaround I found for versions earlier than that was to create an intermediate static library that used some property magic to place all linkage dependencies inside the -whole-archive section. What am I doing wrong?įor 3.12 and newer versions of CMake, I would use object libraries. putting the -whole-archive stuff at lower layers), but haven't come across an approach that works using CMake. I've tried many different combinations (e.g. I expected that because Lib2A has Lib3* libraries as dependencies, that they would also be "inside" the -whole-archive part of the linker command, but they show up outside. Inevitably, symbols from some of the layer 3 static libraries get lost and I get missing symbol errors. I end up with an actual link stage command like: g++ -o Exe1 -Wl,-whole-archive libLib2A.a libLib2B.a -Wl,-no-whole-archive libLib3A.a libLib3B.a libLib3C.a When I add the below for the linking of Exe1: target_link_libraries(Exe1 -Wl,-whole-archive Lib2A Lib2B -Wl,-no-whole-archive) The problem is that I need to use -whole-archive when linking or else some symbols from the underlying libraries are not found. The numbers here show their layer in the hierarchy. ![]() Lib2A will depend on static Lib3A, lib3B, lib3C, etc. There's a hierarchy, so Exe1 will link against static libs Lib2A and Lib2B. As a first step in making the project more modular, I am breaking up the build into several smaller chunks and making them static libraries. I've got a project that used to be a giant set of source files that all got compiled and then linked as one executable. ![]()
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