[sanitizer] Ptrace syscall handler.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@193633 91177308-0d34-0410-b5e6-96231b3b80d8
[sanitizer] Fix build warnings.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@193634 91177308-0d34-0410-b5e6-96231b3b80d8
[asan] Fix build.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@193635 91177308-0d34-0410-b5e6-96231b3b80d8
[tsan] Fix unused variable warnings.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@193639 91177308-0d34-0410-b5e6-96231b3b80d8