[OpenMP] affinity little fix for FreeBSD

- pthread affinity np has different semantic than sched affinity counterpart. On success returns strictly 0.

Reviewers: chandlerc, AndreyChurbanov, jdoerfert

Reviewed By: jdoerfert

Differential Revision: https://reviews.llvm.org/D72132

openmp/runtime/src/kmp_affinity.h

@@ -303,8 +303,9 @@ class KMPNativeAffinity : public KMPAffinity {
       int retval =
           syscall(__NR_sched_getaffinity, 0, __kmp_affin_mask_size, mask);
 #elif KMP_OS_FREEBSD
-      int retval =
+      int r =
           pthread_getaffinity_np(pthread_self(), __kmp_affin_mask_size, reinterpret_cast<cpuset_t *>(mask));
+      int retval = (r == 0 ? 0 : -1);
 #endif
       if (retval >= 0) {
         return 0;
@@ -322,8 +323,9 @@ class KMPNativeAffinity : public KMPAffinity {
       int retval =
           syscall(__NR_sched_setaffinity, 0, __kmp_affin_mask_size, mask);
 #elif KMP_OS_FREEBSD
-      int retval =
+      int r =
           pthread_setaffinity_np(pthread_self(), __kmp_affin_mask_size, reinterpret_cast<cpuset_t *>(mask));
+      int retval = (r == 0 ? 0 : -1);
 #endif
       if (retval >= 0) {
         return 0;

openmp/runtime/src/z_Linux_util.cpp

@@ -164,7 +164,7 @@ void __kmp_affinity_determine_capable(const char *env_var) {
   if (gCode > 0) { // Linux* OS only
     // The optimal situation: the OS returns the size of the buffer it expects.
     //
-    // A verification of correct behavior is that Isetaffinity on a NULL
+    // A verification of correct behavior is that setaffinity on a NULL
     // buffer with the same size fails with errno set to EFAULT.
     sCode = syscall(__NR_sched_setaffinity, 0, gCode, NULL);
     KA_TRACE(30, ("__kmp_affinity_determine_capable: "
@@ -286,7 +286,7 @@ void __kmp_affinity_determine_capable(const char *env_var) {
   if (gCode == 0) {
     KMP_AFFINITY_ENABLE(KMP_CPU_SET_SIZE_LIMIT);
     KA_TRACE(10, ("__kmp_affinity_determine_capable: "
-                  "affinity supported (mask size %d)\n"<
+                  "affinity supported (mask size %d)\n",
 		  (int)__kmp_affin_mask_size));
     KMP_INTERNAL_FREE(buf);
     return;