[Sanitizer] implementing remaining function under OSX

- GetRandom and GetnumberOfCPUs using sys call for the former.
- enabling unit tests for the other oses.

Reviewers: kubamracek

Reviewed By: kubamracek

Differential Revision: https://reviews.llvm.org/D50937

llvm-svn: 340621

compiler-rt/lib/sanitizer_common/sanitizer_mac.cc

@@ -1064,14 +1064,16 @@ void CheckNoDeepBind(const char *filename, int flag) {
   // Do nothing.
 }
 
-// FIXME: implement on this platform.
 bool GetRandom(void *buffer, uptr length, bool blocking) {
-  UNIMPLEMENTED();
+  if (!buffer || !length || length > 256)
+    return false;
+  // arc4random never fails.
+  arc4random_buf(buffer, length);
+  return true;
 }
 
-// FIXME: implement on this platform.
 u32 GetNumberOfCPUs() {
-  UNIMPLEMENTED();
+  return (u32)sysconf(_SC_NPROCESSORS_ONLN);
 }
 
 }  // namespace __sanitizer

compiler-rt/lib/sanitizer_common/tests/sanitizer_common_test.cc

@@ -354,7 +354,8 @@ TEST(SanitizerCommon, InternalScopedString) {
   EXPECT_STREQ("012345678", str.data());
 }
 
-#if SANITIZER_LINUX
+#if SANITIZER_LINUX || SANITIZER_FREEBSD || \
+  SANITIZER_OPENBSD || SANITIZER_MAC || SANITIZER_IOS
 TEST(SanitizerCommon, GetRandom) {
   u8 buffer_1[32], buffer_2[32];
   for (bool blocking : { false, true }) {