http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59410
--- Comment #3 from Kostya Serebryany <kcc at gcc dot gnu.org> --- (In reply to H.J. Lu from comment #0) > On a Linux/x86-64 machine with 4GB RAM, I got failures like: > > FAIL: c-c++-common/tsan/atomic_stack.c -O0 output pattern test, is FATAL: > ThreadSanitizer can not mmap the shadow memory (something is mapped at > 0x555555554000 < 0x7cf000000000) This warning is not about physical RAM, but about virtual RAM. This systems is not compatible with the tsan's shadow mapping. Can you show the /proc/self/maps of the process before it dies (just put a breakpoint on __tsan_init)? I assume that asan tests pass on this machine and you don't have strict rlimit on virtual memory.
