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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 Prepare Compiler-RT for GnuInstallDirs, matching libcxx, document all 2021-07-13 15:21:41 +00:00
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 [GWP-ASan] Add inbuilt options parser. 2021-01-15 12:57:05 -08:00
unittests [test] Fix asan dynamic unit tests with per-target runtime dirs 2021-10-14 16:47:25 -04:00
utils [compiler-rt] NFC: Fix trivial typo 2021-09-04 14:12:58 +05:30
www Update all LLVM documentation mentioning runtimes in LLVM_ENABLE_PROJECTS 2022-02-10 15:05:23 -05:00
.clang-tidy NFC: .clang-tidy: Inherit configs from parents to improve maintainability 2021-06-08 08:25:59 -07:00
.gitignore
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CMakeLists.txt [CMake] Use generator expression to get in-tree libc++ path 2022-01-26 14:12:48 -08:00
CODE_OWNERS.TXT
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CREDITS.TXT
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LICENSE.TXT
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README.txt
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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.

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