address-sanitizer

I compiled my code like this to enable Asan: g++ -O0 -g -fsanitize=address -fno-omit-frame-pointer but it never generates a core dump so that I can later examine the details of the error. How can I generate it? You need to set environment variable to request coredumps export ASAN_OPTIONS=abort_on_error=1 This should really be default but due to historic reasons ASan just exits with non-zero error code instead. On 64-bit systems you might need to add export ASAN_OPTIONS=...:disable_coredump=0::unmap_shadow_on_exit=1 (coredumps are disabled by default there, in fear that they will be too large).

I am trying to build (with clang) my application with the address sanitizer described here ( https://github.com/google/sanitizers/wiki/AddressSanitizer , more precisely here: https://github.com/google/sanitizers/wiki/AddressSanitizerOnAndroid ), but I am having trouble understanding the whole process, especially using gradle. It looks like there is at least 3 ways of enabling it: 1°) Following the first link, t says that all you have to do is doing this: adding -fsanitize=address to the cppFlags + optional -fno-omit-frame-pointer adding -fsanitize=address to the linker flags (is it necessary?)

I want to use LeakSanitizer to detect leaked memory, but the style of the program I am using does not free memory before exit . This is fairly common in my experience. I want to detect this leak: int main(int argc, char const *argv[]) { char *p = malloc(5); p = 0; return 0; } And ignore this leak: int main(int argc, char const *argv[]) { char *p = malloc(5); return 0; } You want LSan to report only unreachable leaks i.e. pointers which are guaranteed to be leaked by the program. Problem is that by default LeakSanitizer runs it's checks at the end of the program, often after global C++ dtors

Update (30-Sept-2016) The Ubuntu build of gcc-6.2 ((Ubuntu 6.2.0-3ubuntu11~16.04) 6.2.0 20160901) no longer has this issue. I'm using the Ubuntu build of gcc-6.1[1] ((Ubuntu 6.1.1-3ubuntu11~14.04.1) 6.1.1 20160511), GNU binutils 2.24, and libstdc++ with GLIBCXX_3.4.22 support. Even on a simple "hello world" program, specifying a sanitizer is not forcing use of the gold linker. main.cpp #include <iostream> int main() { std::cout << "Hello, world!\n"; } Compiling and linking g++ -fsanitize=address -c -o main main.cpp g++ -fsanitize=address -o main main.o gives the error /usr/bin/ld: unrecognized

Recent versions of GCC and Clang feature Undefined Behavior Sanitizer (UBSan) which is a compile flag ( -fsanitize=undefined ) that adds runtime instrumentation code. On errors, a warning such as this one is shown: packet-ber.c:1917:23: runtime error: left shift of 54645397829836991 by 8 places cannot be represented in type 'long int' Now I would like to debug this and get a debug break on said line. For Address Sanitizer (ASAN) there is ASAN_OPTIONS=abort_on_error=1 which results in a fatal error that is catchable. The only UBSan option that seems usable is UBSAN_OPTIONS=print_stacktrace=1

As announced at WWDC 2015, Clang Address Sanitizer is being brought to Xcode and OS X. Session 413: Advanced Debugging and the Address Sanitizer How do you enable Clang Address Sanitizer for your Xcode project? Address Sanitizer has been added as a new feature in Xcode 7. Use the Runtime Sanitization > Enable Address Sanitizer flag in your scheme to enable the option. git will then shown this change to your .xcscheme file: enableAddressSanitizer = "YES" From the New Features in Xcode 7 document: Address Sanitizer. Xcode 7 can build your app with instrumentation designed to catch and debug

Currently running llvm, clang, clang-format, and clang-modernize on Ubuntu Bash on Windows. I would like to use the set of sanitize tools released by google including address, memory, and thread sanitize. None of the fsanitize options seem to work. Here is the code sample for ASAN: #include <stdlib.h> int main() { char *x = (char *)malloc(10 * sizeof(char *)); free(x); return x[5];// purposely accessing deallocated memory } Here is the clang call in bash on windows: $clang++-3.5 -fsanitize=address -o1 -fno-omit-frame-pointer -g main.cpp -o main $./main Results ==70==Sanitizer CHECK failed: