[TSan] Fix a typo ThreadIgnoreSyncEnd. Found by inspection

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@205531 91177308-0d34-0410-b5e6-96231b3b80d8
[TSan] Fix a rare deadlock on multithreaded fork.

If a multi-threaded program calls fork(), TSan ignores all memory accesses
in the child to prevent deadlocks in TSan runtime. This is OK, as child is
probably going to call exec() as soon as possible. However, a rare deadlocks
could be caused by ThreadIgnoreBegin() function itself.

ThreadIgnoreBegin() remembers the current stack trace and puts it into the
StackDepot to report a warning later if a thread exited with ignores enabled.
Using StackDepotPut in a child process is dangerous: it locks a mutex on
a slow path, which could be already locked in a parent process.

The fix is simple: just don't put current stack traces to StackDepot in
ThreadIgnoreBegin() and ThreadIgnoreSyncBegin() functions if we're
running after a multithreaded fork. We will not report any
"thread exited with ignores enabled" errors in this case anyway.

Submitting this without a testcase, as I believe the standalone reproducer
is pretty hard to construct.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@205534 91177308-0d34-0410-b5e6-96231b3b80d8
[msan] Fix compilation of a disabled test.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@205613 91177308-0d34-0410-b5e6-96231b3b80d8
Revert r205613.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@205614 91177308-0d34-0410-b5e6-96231b3b80d8
[asan] fix a leak in __tls_get_addr handler; introduce a run-time flag to disable this handler completely; remove a workaround for a bug fixed in glibc

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@205617 91177308-0d34-0410-b5e6-96231b3b80d8