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Dmitry Vyukov 66298e1c54 tsan: fix another false positive related to open/close 
The false positive fixed by commit f831d6fc80
("tsan: fix false positive during fd close") still happens episodically
on the added more stressful test which does just open/close.

I don't have a coherent explanation as to what exactly happens
but the fix fixes the false positive on this test as well.
The issue may be related to lost writes during asynchronous MADV_DONTNEED.
I've debugged similar unexplainable false positive related to freed and
reused memory and at the time the only possible explanation I found is that
an asynchronous MADV_DONTNEED may lead to lost writes. That's why commit
302ec7b9bc ("tsan: add memory_limit_mb flag") added StopTheWorld around
the memory flush, but unfortunately the commit does not capture these findings.

Reviewed By: melver

Differential Revision: https://reviews.llvm.org/D121363
2022-03-10 17:02:51 +01:00
..
cmake Revert "[CMake][compiler-rt] Make CRT separately buildable" 2022-03-07 23:59:29 -08:00
docs
include Reland "[memprof] Extend the index prof format to include memory profiles." 2022-02-17 22:09:52 -08:00
lib tsan: fix another false positive related to open/close 2022-03-10 17:02:51 +01:00
test tsan: fix another false positive related to open/close 2022-03-10 17:02:51 +01:00
tools
unittests
utils
www Update all LLVM documentation mentioning runtimes in LLVM_ENABLE_PROJECTS 2022-02-10 15:05:23 -05:00
.clang-tidy
.gitignore
CMakeLists.txt [CMake] Use generator expression to get in-tree libc++ path 2022-01-26 14:12:48 -08:00
CODE_OWNERS.TXT
CREDITS.TXT
LICENSE.TXT
README.txt

README.txt 

Compiler-RT
================================

This directory and its subdirectories contain source code for the compiler
support routines.

Compiler-RT is open source software. You may freely distribute it under the
terms of the license agreement found in LICENSE.txt.

================================