address-sanitizer

问题 I have activated address sanitizer for my app's native codes in order to detect some memory leak. But I have a strange problem. Before activating address sanitizer, app just runs normally and I can debug it without any problems. But after activating address sanitizer, I cannot debug app anymore, even though it runs just fine. It is a really strange behavior because after activating address sanitizer, "Waiting for Debugger..." message does not show anymore and I get following error in debug

问题 Mac OS X Sierra 10.13 I do as wrote here https://clang.llvm.org/docs/LeakSanitizer.html I.e. created the small application with memory leak #include <stdlib.h> void *p; int main() { p = malloc(7); p = 0; // The memory is leaked here. return 0; } Then build it and run to test how the memory leak is detected: admins-Mac:test2 admin$ clang -fsanitize=address -g mleak.c ; ASAN_OPTIONS=detect_leaks=1 ./a.out ==556==AddressSanitizer: detect_leaks is not supported on this platform. Abort trap: 6

问题 I want some tool to diagnose user-after-free bugs and uninitialized bugs. I am considering Sanitizer(Memory and/or Address) and Valgrind. But I have very little idea about their advantages and disadvantages. Can anyone tell the main features, differences and pros/cons of Sanitizer and Valgrind? Edit: I found some of comparisons like: Valgrind uses DBI(dynamic binary instrumentation) and Sanitizer uses CTI(compile-time instrumentation). Valgrind makes the program much slower(20x) whether

问题 I'm working on a project which has a "util" library containing stuff like logging, assertion handling etc. This is compiled into a static library with -fPIC added. I also have a plugin system, where the plugins are shared libraries loaded at runtime via dlopen . Those plugins and the main executable both use the static util library. The problem: Now I'm getting AddressSanitizer: odr-violation errors when using ASAN. The issue is size=40 'vtable for StdStreamWriter' reported twice where

问题 I'm working on a project which has a "util" library containing stuff like logging, assertion handling etc. This is compiled into a static library with -fPIC added. I also have a plugin system, where the plugins are shared libraries loaded at runtime via dlopen . Those plugins and the main executable both use the static util library. The problem: Now I'm getting AddressSanitizer: odr-violation errors when using ASAN. The issue is size=40 'vtable for StdStreamWriter' reported twice where

问题 My app is using boost::program_options and it's triggering an AddressSanitizer "stack-buffer-overflow" while generating an error message from an exception. I'm not worried about the boost bug - the functionality works and this is just in the command line parsing portion of a non-production app. However I'd like to suppress the AddressSanitizer message. ERROR: AddressSanitizer: stack-buffer-overflow on address 0x7fffe6ce7070 at pc 0x0000007406cd bp 0x7fffe6ce6fe0 sp 0x7fffe6ce6fd8 READ of size

问题 I've added AddressSanitizer flag as follow: set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=address") Everything builds and runs fine when using Unix Makefiles . The problem comes when generating the Xcode project, it just doesn't want to link because it cannot find the ASan library. I already found two solutions, but decided not to use them because they cannot be automated using just CMake: Adding -Wl,-undefined,dynamic_lookup to the linked flags, so it skips linking to dynamic libraries

问题 I've added AddressSanitizer flag as follow: set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=address") Everything builds and runs fine when using Unix Makefiles . The problem comes when generating the Xcode project, it just doesn't want to link because it cannot find the ASan library. I already found two solutions, but decided not to use them because they cannot be automated using just CMake: Adding -Wl,-undefined,dynamic_lookup to the linked flags, so it skips linking to dynamic libraries

问题 I wanted to know how the following error message should be read. In particular: (1) what do things such as fa (heap left redzone) and fd (freed heap region) mean? (2) What is the significance of the 00s and 05s. (3) What is the significance of the memory block being pointed to (0x0c067fff8010)? (4) What is a wild pointer? (5) Why is the fa on the line with the memory block that has an arrow to it in square brackets ([fa])? Compilation Command clang++ test.cpp -fsanitize=address -D_LIBCPP

问题 When I compile my C++ code with -fsanitize=address , my software prints out a list of leaks at the time it exits. Is there a way to avoid the leaks report (I'm only interested in memory corruptions, not leaks)? I went to the page with ASAN flags page, but it doesn't look like any of those flags is a match. 回答1: You can run with export ASAN_OPTIONS=detect_leaks=0 or add a function to your application: const char* __asan_default_options() { return "detect_leaks=0"; } See Flags wiki for more