tsan: special handling of .rodata (don't try to find races, don't keep shadow, dont' put into traces)



git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@177517 91177308-0d34-0410-b5e6-96231b3b80d8
tsan: fix incorrect test 



git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@177519 91177308-0d34-0410-b5e6-96231b3b80d8
tsan: reduce size of mutexsets from 64 to 16 mutexes
overflow is handled anyway
saves memory because each thread holds 1024 mutexsets



git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@177520 91177308-0d34-0410-b5e6-96231b3b80d8