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20 Commits

Author SHA1 Message Date
Nick Lewycky
4d0a9ff365 Add support for tsan annotations (thread sanitizer, a valgrind-based tool). 
These annotations are disabled entirely when either ENABLE_THREADS is off, or
building a release build. When enabled, they add calls to functions with no
statements to ManagedStatic's getters.

Use these annotations to inform tsan that the race used inside ManagedStatic
initialization is actually benign. Thanks to Kostya Serebryany for helping
write this patch!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144567 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-11-14 20:50:16 +00:00
Michael J. Spencer
1f6efa3996 Merge System into Support. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120298 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-29 18:16:10 +00:00
Owen Anderson
2da497902a Remove dead code. ManagedCleanup is unused, and contained a serious bug in that 
the provided cleanup function is never actually called.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113284 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-09-07 20:53:39 +00:00
Alisdair Meredith
80c8c31782 Resolve undefined behaviour when ManagedStatic is instantiated with a fixed-length array type. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75149 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-07-09 17:26:16 +00:00
Owen Anderson
94fefe27f5 Fences are expensive. Avoid doing them when we're not in multithreaded mode. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73777 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-06-19 17:50:11 +00:00
Owen Anderson
e3cd5ca7e7 Move Threading.[h|cpp] from Support to System. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73707 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-06-18 16:54:52 +00:00
Owen Anderson
4c7ac18fc9 Split the thread-related APIs out into their own file, and add a few more 
calls for convenience.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73512 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-06-16 17:33:51 +00:00
Owen Anderson
6afe2fa288 Have llvm_start_multithreaded return a bool indicating whether multithreaded 
initialization succeeded or not, rather than just asserting.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72182 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-20 21:03:06 +00:00
Owen Anderson
b4d97b78df Add llvm_start_multithreaded(), which starts up the LLVM internals in thread-safe mode. Provide double-check locking 
initialization of ManagedStatic's when running in thread-safe mode.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72151 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-20 00:39:20 +00:00
Owen Anderson
18ad4cb95d Back out the thread-safe ManagedStatic for now. Too many people have too many problems with it for the moment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71931 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-16 07:20:52 +00:00
Owen Anderson
ca37b511fa Factor out some common code, fix more typoes, and add a memory fence that might be needed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71853 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-15 08:22:07 +00:00
Owen Anderson
d300a28c40 Fix an unfortunate typo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71852 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-15 08:07:23 +00:00
Owen Anderson
5f00b0c5b6 Now with working on Leopard! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71819 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-15 00:01:40 +00:00
Owen Anderson
87ba22dc67 Make ManagedStatic threadsafe by using atomic operations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71796 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-14 21:26:50 +00:00
Misha Brukman
fe2cce63aa Removed trailing whitespace. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65196 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-20 22:51:36 +00:00
Chris Lattner
7ed47a1335 Don't attribute in file headers anymore. See llvmdev for the 
discussion of this change.  Boy are my fingers tired. ;-)



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45411 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-12-29 19:59:42 +00:00
Chris Lattner
b4d7e35dde add a way to register an arbitrary cleanup function. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34442 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-20 06:08:37 +00:00
Chris Lattner
68ce9ba666 add helper method. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34155 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-10 19:54:24 +00:00
Chris Lattner
bdbf5fd1c9 add a helper to call llvm_shutdown() 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32249 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-06 01:01:14 +00:00
Chris Lattner
771cbf30bc new helper class to provide more explicit management of static ctor/dtors. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30638 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-28 00:31:55 +00:00