[asan] Fix a deadlock between asan's allocator and lsan

Summary:
This fixes a deadlock which happens in lsan
on a large memalign-allocated chunk that resides in lsan's root set.

Reviewers: samsonov, earthdok

Reviewed By: earthdok

CC: llvm-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D1957

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@192885 91177308-0d34-0410-b5e6-96231b3b80d8
[sanitizer] Fix unpoisoning of msghdr::msg_name in recvmsg interceptor.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@192886 91177308-0d34-0410-b5e6-96231b3b80d8
[asan] fix a failure with ASAN_OPTIONS=verbosity=1:use_sigaltstack=1

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@192892 91177308-0d34-0410-b5e6-96231b3b80d8
[ASan] fix assign_large_valloc_to_global.cc to use the correct header for valloc() on OSX.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@192901 91177308-0d34-0410-b5e6-96231b3b80d8
Make the big array in the UBSan C++ runtime be zero-initialized to dramatically
shrink the binary size of the ubsan runtime.

Also fix a bug where long-running processes could eventually trigger a crash in
the runtime by filling up the cache. I've not found a nice way to add a test for
this crasher; ideas welcome.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@192931 91177308-0d34-0410-b5e6-96231b3b80d8
[asan] fix atexit stats

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@192956 91177308-0d34-0410-b5e6-96231b3b80d8
[sanitizer] Intercept getmntent, getmntent_r.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@192959 91177308-0d34-0410-b5e6-96231b3b80d8
[asan] fix a test on Mac

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@192960 91177308-0d34-0410-b5e6-96231b3b80d8