Hello, I have just downloaded and built gcc 5.1: $ gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/home/brahim/opt/libexec/gcc/x86_64-unknown-linux-gnu/5.1.0/lto-wrapper Target: x86_64-unknown-linux-gnu Configured with: ../configure --prefix=/home/brahim/opt/ --with-gmp=/home/brahim/opt/ --with-mpfr=/home/brahim/opt/ --with-mpc=/home/brahim/opt/ --with-cloog=/home/brahim/opt/ --with-isl=/home/brahim/opt/ --enable-plugin --enable-gold --enable-multiarch --enable-multilib --enable-languages=c,c++,lto --enable-lto --enable-libsanitizer --with-arch-64=native Thread model: posix gcc version 5.1.0 (GCC) I am trying the thread sanitizer on a simple program compiled like this: g++ -std=gnu++14 -Wall -Wextra -Og -ggdb3 -fno-omit-frame-pointer test.cc -o a.out -D_GLIBCXX_DEBUG -fsanitize=thread -pthread But the executable is always blocked. Whenever i run it with gdb and i interrrupt (ctrl-c) the executable the stack is always like this: (gdb) r Starting program: /home/brahim/these/git/circular-buffer/a.out [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib64/libthread_db.so.1". Program received signal SIGINT, Interrupt. 0x0000003b85e6f30a in malloc_consolidate () from /lib64/libc.so.6 (gdb) where #0 0x0000003b85e6f30a in malloc_consolidate () from /lib64/libc.so.6 #1 0x0000003b85e701c1 in mallopt () from /lib64/libc.so.6 #2 0x00002aaaaaaf3cab in __tsan::InitializeInterceptors () at ../../../../libsanitizer/tsan/tsan_interceptors.cc:2389 #3 0x00002aaaaab156a3 in __tsan::Initialize (thr=thr@entry=0x2aaaac104c00) at ../../../../libsanitizer/tsan/tsan_rtl.cc:313 #4 0x00002aaaaaad4878 in ScopedInterceptor::ScopedInterceptor (this=0x7fffffffe200, thr=0x2aaaac104c00, fname=<optimized out>, pc=255665919395) at ../../../../libsanitizer/tsan/tsan_interceptors.cc:190 #5 0x00002aaaaaad5ad1 in __interceptor_memset (dst=0x7fffffffe268, v=0, size=128) at ../../../../libsanitizer/tsan/tsan_interceptors.cc:632 #6 0x0000003b86e055a3 in __pthread_initialize_minimal_internal () from /lib64/libpthread.so.0 #7 0x0000003b86e04dd9 in _init () from /lib64/libpthread.so.0 #8 0x0000000000000000 in ?? () I tried to comment the mallopt line in the source code of libsanitizer but I have another error. Did I do a mistake somewhere? Could you help me to make it work? Thanks Brahim
