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6 Commits

Author SHA1 Message Date
Dmitry Vyukov be41a98ac2 tsan: fix deadlock with pthread_atfork callbacks 
This fixes the bug reported at:
https://groups.google.com/forum/#!topic/thread-sanitizer/e_zB9gYqFHM

A pthread_atfork callback triggers a data race
and we deadlock on the report_mtx. Ignore memory access
in the pthread_atfork callbacks to prevent the deadlock.
 2020-03-21 14:36:51 +01:00
Evgenii Stepanov 966b5182ba Change internal_start_thread arguments to match pthread_create. 
This avoids a CFI-unfriendly function pointer type cast in
internal_start_thread.
 2020-01-23 13:15:16 -08:00
Vitaly Buka d39e7e2cf1 [compiler-rt] Use GetNextInstructionPc in signal handlers 
Summary:
All other stack trace callers assume that PC contains return address.
HWAsan already use GetNextInstructionPc in similar code.

PR43339

Reviewers: eugenis, kcc, jfb

Subscribers: dexonsmith, dberris, #sanitizers, llvm-commits

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D68313

llvm-svn: 373529
 2019-10-02 21:20:37 +00:00
Julian Lettner fc910c507e [TSan] Add interceptors for mach_vm_[de]allocate 
I verified that the test is red without the interceptors.

rdar://40334350

Reviewed By: kubamracek, vitalybuka

Differential Revision: https://reviews.llvm.org/D66616

llvm-svn: 371439
 2019-09-09 18:57:32 +00:00
Alexander Richardson 0b168ffdc3 [TSAN] Fix tsan on FreeBSD after D54889 
Summary:
It appears that since https://reviews.llvm.org/D54889, BackgroundThread()
crashes immediately because cur_thread()-> will return a null pointer
which is then dereferenced. I'm not sure why I only see this issue on
FreeBSD and not Linux since it should also be unintialized on other platforms.

Reviewers: yuri, dvyukov, dim, emaste

Subscribers: kubamracek, krytarowski, #sanitizers, llvm-commits

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D65705

llvm-svn: 368103
 2019-08-06 22:30:48 +00:00
Nico Weber 5a3bb1a4d6 compiler-rt: Rename .cc file in lib/tsan/rtl to .cpp 
Like r367463, but for tsan/rtl.

llvm-svn: 367564
 2019-08-01 14:22:42 +00:00