Enable OpenBSD support.

AndreyChurbanov · AndreyChurbanov · commit 27f6eedc57f9 · 2019-10-30T12:37:44.000+03:00
Patch by devnexen (David CARLIER) Differential Revision: https://reviews.llvm.org/D69220
diff --git a/openmp/runtime/src/kmp_ftn_entry.h b/openmp/runtime/src/kmp_ftn_entry.h
@@ -531,7 +531,7 @@ int FTN_STDCALL KMP_EXPAND_NAME(FTN_GET_THREAD_NUM)(void) {
   int gtid;
 
 #if KMP_OS_DARWIN || KMP_OS_DRAGONFLY || KMP_OS_FREEBSD || KMP_OS_NETBSD ||    \
-        KMP_OS_HURD
+        KMP_OS_HURD|| KMP_OS_OPENBSD
   gtid = __kmp_entry_gtid();
 #elif KMP_OS_WINDOWS
   if (!__kmp_init_parallel ||
diff --git a/openmp/runtime/src/kmp_wrapper_getpid.h b/openmp/runtime/src/kmp_wrapper_getpid.h
@@ -29,6 +29,8 @@
 #elif KMP_OS_NETBSD
 #include <lwp.h>
 #define __kmp_gettid() _lwp_self()
+#elif KMP_OS_OPENBSD
+#define __kmp_gettid() syscall(SYS_getthrid)
 #elif defined(SYS_gettid)
 // Hopefully other Unix systems define SYS_gettid syscall for getting os thread
 // id
diff --git a/openmp/runtime/src/z_Linux_util.cpp b/openmp/runtime/src/z_Linux_util.cpp
@@ -54,7 +54,7 @@
 #include <sys/sysctl.h>
 #include <sys/user.h>
 #include <pthread_np.h>
-#elif KMP_OS_NETBSD
+#elif KMP_OS_NETBSD || KMP_OS_OPENBSD
 #include <sys/types.h>
 #include <sys/sysctl.h>
 #endif
@@ -2130,9 +2130,36 @@ int __kmp_is_address_mapped(void *addr) {
     }
   }
   KMP_INTERNAL_FREE(kiv);
-#elif KMP_OS_DRAGONFLY || KMP_OS_OPENBSD
+#elif KMP_OS_OPENBSD
+
+  int mib[3];
+  mib[0] = CTL_KERN;
+  mib[1] = KERN_PROC_VMMAP;
+  mib[2] = getpid();
+
+  size_t size;
+  uint64_t end;
+  rc = sysctl(mib, 3, NULL, &size, NULL, 0);
+  KMP_ASSERT(!rc);
+  KMP_ASSERT(size);
+  end = size;
+
+  struct kinfo_vmentry kiv = {.kve_start = 0};
+
+  while ((rc = sysctl(mib, 3, &kiv, &size, NULL, 0)) == 0) {
+    KMP_ASSERT(size);
+    if (kiv.kve_end == end)
+      break;
+
+    if (kiv.kve_start >= (uint64_t)addr && kiv.kve_end <= (uint64_t)addr) {
+      found = 1;
+      break;
+    }
+    kiv.kve_start += 1;
+  }
+#elif KMP_OS_DRAGONFLY
 
-  // FIXME(DragonFly, OpenBSD): Implement this
+  // FIXME(DragonFly): Implement this
   found = 1;
 
 #else
