https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78294
Dmitry Vyukov <dvyukov at google dot com> changed:
What |Removed |Added
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CC| |dvyukov at google dot com
--- Comment #1 from Dmitry Vyukov <dvyukov at google dot com> ---
Humm... This is puzzling.
Just in case, you set LD_LIBRARY_PATH to point to the new libtsan.so?
ScopedInterceptor already called cur_thread here:
#4 0x00007ffff6f43b90 in __tsan::ScopedInterceptor::ScopedInterceptor
and it did not crash.
But then
#2 0x00007ffff6f8b00a in
__tsan::ScopedIgnoreInterceptors::ScopedIgnoreInterceptors
calls cur_thread again and it ends up in __tls_get_addr, which crashes...
I've just built gcc version 7.0.0 20161111 (experimental) (GCC), and your repro
works. Although, I have a different kernel and glibc.
However, __tsan::Initialize does not contain a call to __tls_get_addr to get
the address of cur_thread:
000000000006da60 <__tsan::Initialize(__tsan::ThreadState*)>:
6da60: 80 3d 25 73 47 00 00 cmpb $0x0,0x477325(%rip) #
4e4d8c <__tsan::Initialize(__tsan::ThreadState*)::is_initialized>
6da67: 74 07 je 6da70
<__tsan::Initialize(__tsan::ThreadState*)+0x10>
6da69: f3 c3 repz retq
6da6b: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
6da70: 41 57 push %r15
6da72: 41 56 push %r14
6da74: 41 55 push %r13
6da76: 41 54 push %r12
6da78: 55 push %rbp
6da79: 53 push %rbx
6da7a: 48 83 ec 48 sub $0x48,%rsp
6da7e: c6 05 07 73 47 00 01 movb $0x1,0x477307(%rip) #
4e4d8c <__tsan::Initialize(__tsan::ThreadState*)::is_initialized>
6da85: 48 89 7c 24 18 mov %rdi,0x18(%rsp)
6da8a: 64 48 8b 04 25 00 00 mov %fs:0x0,%rax
6da91: 00 00
6da93: 48 03 05 fe 9e 26 00 add 0x269efe(%rip),%rax #
2d7998 <_DYNAMIC+0xa10>
6da9a: 48 8d 3d 6f ce 00 00 lea 0xce6f(%rip),%rdi # 7a910
<__tsan::TsanCheckFailed(char const*, int, char const*, unsigned long long,
unsigned long long)>
6daa1: 48 8d 0d 1c 09 04 00 lea 0x4091c(%rip),%rcx #
ae3c4 <__tsan::MutexSet::kMaxSize+0x1024>
6daa8: 83 80 98 02 02 00 01 addl $0x1,0x20298(%rax)
The instructions are:
6da8a: 64 48 8b 04 25 00 00 mov %fs:0x0,%rax
6da93: 48 03 05 fe 9e 26 00 add 0x269efe(%rip),%rax
6daa8: 83 80 98 02 02 00 01 addl $0x1,0x20298(%rax)
which is reasonable for initial_exec tls.
Please post disassembly of these frames and point to the exact call sites:
#2 0x00007ffff6f8b00a in
__tsan::ScopedIgnoreInterceptors::ScopedIgnoreInterceptors (this=<synthetic
pointer>) at ../../../../gcc/libsanitizer/tsan/tsan_rtl.h:549
#3 __tsan::Initialize (thr=thr@entry=0x7ffff6277780) at
../../../../gcc/libsanitizer/tsan/tsan_rtl.cc:331
