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9 Commits

Author SHA1 Message Date
Dmitry Vyukov 0984b8de0b tsan: don't leave unmapped hole in non-app memory 
If an app mmaps lots of memory, a user mmap may end up
in the tsan region for traces. Shadow for this range
overlaps with shadow for other user regions.
This causes havok: from false positives to crashes.
Don't leave unmapped holes in the traces region.

Reviewed-in: https://reviews.llvm.org/D96697
 2021-02-17 08:37:04 +01:00
Teresa Johnson 31bc55d602 [sanitizer] Convert PrintModuleMap to DumpProcessMap 
As discussed in the review for D87120 (specifically at
https://reviews.llvm.org/D87120#inline-831939), clean up PrintModuleMap
and DumpProcessMap usage differences. The former is only implemented for
Mac OSX, whereas the latter is implemented for all OSes. The former is
called by asan and tsan, and the latter by hwasan and now memprof, under
the same option. Simply rename the PrintModuleMap implementation for Mac
to DumpProcessMap, remove other empty PrintModuleMap implementations,
and convert asan/tsan to new name. The existing posix DumpProcessMap is
disabled for SANITIZER_MAC.

Differential Revision: https://reviews.llvm.org/D89630
 2020-10-21 12:46:49 -07:00
Chris Kennelly 96855125e7 [tsan] Respect no_huge_pages_for_shadow. 
Disable huge pages in the TSan shadow regions when no_huge_pages_for_shadow == true (default).

Reviewed By: eugenis

Differential Revision: https://reviews.llvm.org/D85841
 2020-08-13 15:55:23 -04:00
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