llvm-project

Commit Graph

Author	SHA1	Message	Date
Alexey Samsonov	9c54984d43	[TSan] Try harder to avoid compiler-generated memset calls. check_memcpy test added in r254959 fails on some configurations due to memset() calls inserted by Clang. Try harder to avoid them: * Explicitly use internal_memset() instead of empty braced-initializer. * Replace "new T()" with "new T", as the former generates zero-initialization for structs in C++11. llvm-svn: 255136	2015-12-09 18:48:10 +00:00
Dmitry Vyukov	3baf5b390d	tsan: add a useful debug check llvm-svn: 214082	2014-07-28 13:54:18 +00:00
Dmitry Vyukov	bde4c9c773	tsan: refactor storage of meta information for heap blocks and sync objects The new storage (MetaMap) is based on direct shadow (instead of a hashmap + per-block lists). This solves a number of problems: - eliminates quadratic behaviour in SyncTab::GetAndLock (https://code.google.com/p/thread-sanitizer/issues/detail?id=26) - eliminates contention in SyncTab - eliminates contention in internal allocator during allocation of sync objects - removes a bunch of ad-hoc code in java interface - reduces java shadow from 2x to 1/2x - allows to memorize heap block meta info for Java and Go - allows to cleanup sync object meta info for Go - which in turn enabled deadlock detector for Go llvm-svn: 209810	2014-05-29 13:50:54 +00:00

Author

SHA1

Message

Date

Alexey Samsonov

9c54984d43

[TSan] Try harder to avoid compiler-generated memset calls.

check_memcpy test added in r254959 fails on some configurations due to
memset() calls inserted by Clang. Try harder to avoid them:
* Explicitly use internal_memset() instead of empty braced-initializer.
* Replace "new T()" with "new T", as the former generates zero-initialization
  for structs in C++11.

llvm-svn: 255136

2015-12-09 18:48:10 +00:00

Dmitry Vyukov

3baf5b390d

tsan: add a useful debug check

llvm-svn: 214082

2014-07-28 13:54:18 +00:00

Dmitry Vyukov

bde4c9c773

tsan: refactor storage of meta information for heap blocks and sync objects

The new storage (MetaMap) is based on direct shadow (instead of a hashmap + per-block lists).
This solves a number of problems:
 - eliminates quadratic behaviour in SyncTab::GetAndLock (https://code.google.com/p/thread-sanitizer/issues/detail?id=26)
 - eliminates contention in SyncTab
 - eliminates contention in internal allocator during allocation of sync objects
 - removes a bunch of ad-hoc code in java interface
 - reduces java shadow from 2x to 1/2x
 - allows to memorize heap block meta info for Java and Go
 - allows to cleanup sync object meta info for Go
 - which in turn enabled deadlock detector for Go

llvm-svn: 209810

2014-05-29 13:50:54 +00:00

3 Commits