llvm-capstone

mirror of https://github.com/capstone-engine/llvm-capstone.git synced 2024-12-11 08:48:12 +00:00

History

KAWASHIMA Takahiro 7d4167430c [gcov] Fix simultaneous .gcda creation/lock Fixes PR45673 The commit `9180c14fe4` (D76206) resolved only a part of the problem of concurrent .gcda file creation. It ensured that only one process creates the file but did not ensure that the process locks the file first. If not, the process which created the file may clobber the contents written by a process which locked the file first. This is the cause of PR45673. This commit prevents the clobbering by revising the assumption that a process which creates the file locks the file first. Regardless of file creation, a process which locked the file first uses fwrite (new_file==1) and other processes use mmap (new_file==0). I also tried to keep the creation/first-lock process same by using mkstemp/link/unlink but the code gets long. This commit is more simple. Note: You may be confused with other changes which try to resolve concurrent file access. My understanding is (may not be correct): D76206: Resolve race of .gcda file creation (but not lock) This one: Resolve race of .gcda file creation and lock D54599: Same as D76206 but abandoned? D70910: Resolve race of multi-threaded counter flushing D74953: Resolve counter sharing between parent/children processes D78477: Revision of D74953 Differential Revision: https://reviews.llvm.org/D79556		2020-05-13 13:03:03 +09:00
..
cmake	build: use Python3 for compiler-rt	2020-04-28 17:29:04 +00:00
docs
include
lib	[gcov] Fix simultaneous .gcda creation/lock	2020-05-13 13:03:03 +09:00
test	[gcov] Fix simultaneous .gcda creation/lock	2020-05-13 13:03:03 +09:00
tools
unittests
utils
www
.gitignore
CMakeLists.txt	build: use Python3 for compiler-rt	2020-04-28 17:29:04 +00:00
CODE_OWNERS.TXT
CREDITS.TXT
LICENSE.TXT	Fix typos throughout the license files that somehow I and my reviewers	2019-01-21 09:52:34 +00:00
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.

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