does this happen with the fresh clang trunk?
On Tue, Nov 26, 2013 at 11:43 AM, Alexey Samsonov <[email protected]>wrote: > 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 >
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