[tsan] Mark a few more tests with "UNSUPPORTED: darwin"

[kubamracek]

Summary

There's a few more lit tests that require features not available on OS X (pthrea spinlocks, MAP_32BIT, pthread_setname_np), let's mark them with "UNSUPPORTED: darwin".

[dvyukov]

test/tsan/mutexset6.cc

5 ↗

(On Diff #40921)

Please change pthread_spinlock_t to pthread_mutex_t. This is a good test and it does not really need spinlock.

[kubamracek]

Updating patch (keeping mutexset6.cc as it is, will update it in a different revision).

test/tsan/map32bit.cc

 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s
 #include "test.h"
 #include <stdint.h>
 #include <errno.h>
 #include <sys/mman.h>
 
 // Test for issue:
 // https://code.google.com/p/thread-sanitizer/issues/detail?id=5
 
 // MAP_32BIT flag for mmap is supported only for x86_64.
 // XFAIL: mips64
 // XFAIL: aarch64
 
+// MAP_32BIT doesn't exist on OS X.
+// UNSUPPORTED: darwin
+
 void *Thread(void *ptr) {
   *(int*)ptr = 42;
   barrier_wait(&barrier);
   return 0;
 }
 
 int main() {
   barrier_init(&barrier, 2);

test/tsan/thread_name2.cc

 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
 #include "test.h"
 
+// OS X doesn't have pthread_setname_np(tid, name).
+// UNSUPPORTED: darwin
+
 #if defined(__FreeBSD__)
 #include <pthread_np.h>
 #define pthread_setname_np pthread_set_name_np
 #endif
 
 long long Global;
 
 void *Thread1(void *x) {