Hi Pedro! Yes, this is most likely the problem in ASan (ASan stack unwinder uses pointers to stack top/bottom in a given thread, and these pointers are not yet initialized in your case). Can you make a standalone reproducer for this issue? I'll take a look at the code to see if we can properly fix it, or at least add a workaround.
(side note: once again we are hit by calling functions from libpthread in GetThreadStackTopAndBottom, sigh). On Tue, Nov 26, 2013 at 3:01 AM, pedro pinto <[email protected]> wrote: > Hi there, > > I just started running address sanitize AddressSanitizer and I received a > report that I am having trouble parsing: > > ASAN:SIGSEGV > ================================================================= > ==23580==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc > 0x2b3f29713a90 sp 0x2b3f3b526450 bp 0x2b3f3b526ca0 T38) > AddressSanitizer can not provide additional info. > #0 0x2b3f29713a8f in __sanitizer::StackTrace::FastUnwindStack(unsigned > long, unsigned long, unsigned long, unsigned long) ??:? > #1 0x2b3f29704dac in free ??:? > #2 0x2b3f3118f8ac in __pthread_attr_destroy > /build/buildd/eglibc-2.17/nptl/pthread_attr_destroy.c:41 > #3 0x2b3f29711917 in __sanitizer::GetThreadStackTopAndBottom(bool, > unsigned long*, unsigned long*) ??:? > #4 0x2b3f29711d8d in __sanitizer::GetThreadStackAndTls(bool, unsigned > long*, unsigned long*, unsigned long*, unsigned long*) ??:? > #5 0x2b3f2970b72d in __asan::AsanThread::Init() ??:? > #6 0x2b3f2970b98f in __asan::AsanThread::ThreadStart(unsigned long) ??:? > #7 0x2b3f3118df6d in start_thread > /build/buildd/eglibc-2.17/nptl/pthread_create.c:311 > #8 0x2b3f320c79cc in clone > /build/buildd/eglibc-2.17/misc/../sysdeps/unix/sysv/linux/x86_64/clone.S:113 > Thread T38 created by T0 here: > #0 0x2b3f296fa7eb in __interceptor_pthread_create ??:? > #1 0x2b3f301edd67 in tbb::internal::tbb_thread_v3::internal_start(void* > (*)(void*), void*) > /home/ppinto/external/tbb/tbb41_20130314oss/build/linux_intel64_gcc_cc4.1.2_libc2.5_kernel3.2.0_debug/../../src/tbb/tbb_thread.cpp:130 > > .... > ==23580==ABORTING > > Seems like the top of the stack was within Address Sanitizer itself, does > this indicate a bug in sanitizer or am I missing something here? > > Thanks in advance, > -pp > > $ clang --version > Ubuntu clang version 3.4-1ubuntu1 (trunk) (based on LLVM 3.4) > Target: x86_64-pc-linux-gnu > Thread model: posix > > > > _______________________________________________ > cfe-users mailing list > [email protected] > http://lists.cs.uiuc.edu/mailman/listinfo/cfe-users > -- Alexey Samsonov, MSK _______________________________________________ cfe-users mailing list [email protected] http://lists.cs.uiuc.edu/mailman/listinfo/cfe-users
