[ASan] Move GetMacosVersion() to sanitizer_common.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@200700 91177308-0d34-0410-b5e6-96231b3b80d8

Author: ramosian-glider

lib/asan/asan_mac.cc

@@ -23,6 +23,7 @@
 #include "asan_thread.h"
 #include "sanitizer_common/sanitizer_atomic.h"
 #include "sanitizer_common/sanitizer_libc.h"
+#include "sanitizer_common/sanitizer_mac.h"
 
 #include <crt_externs.h>  // for _NSGetArgv
 #include <dlfcn.h>  // for dladdr()
@@ -53,43 +54,6 @@ void GetPcSpBp(void *context, uptr *pc, uptr *sp, uptr *bp) {
 # endif  // SANITIZER_WORDSIZE
 }
 
-MacosVersion cached_macos_version = MACOS_VERSION_UNINITIALIZED;
-
-MacosVersion GetMacosVersionInternal() {
-  int mib[2] = { CTL_KERN, KERN_OSRELEASE };
-  char version[100];
-  uptr len = 0, maxlen = sizeof(version) / sizeof(version[0]);
-  for (uptr i = 0; i < maxlen; i++) version[i] = '\0';
-  // Get the version length.
-  CHECK_NE(sysctl(mib, 2, 0, &len, 0, 0), -1);
-  CHECK_LT(len, maxlen);
-  CHECK_NE(sysctl(mib, 2, version, &len, 0, 0), -1);
-  switch (version[0]) {
-    case '9': return MACOS_VERSION_LEOPARD;
-    case '1': {
-      switch (version[1]) {
-        case '0': return MACOS_VERSION_SNOW_LEOPARD;
-        case '1': return MACOS_VERSION_LION;
-        case '2': return MACOS_VERSION_MOUNTAIN_LION;
-        case '3': return MACOS_VERSION_MAVERICKS;
-        default: return MACOS_VERSION_UNKNOWN;
-      }
-    }
-    default: return MACOS_VERSION_UNKNOWN;
-  }
-}
-
-MacosVersion GetMacosVersion() {
-  atomic_uint32_t *cache =
-      reinterpret_cast<atomic_uint32_t*>(&cached_macos_version);
-  MacosVersion result =
-      static_cast<MacosVersion>(atomic_load(cache, memory_order_acquire));
-  if (result == MACOS_VERSION_UNINITIALIZED) {
-    result = GetMacosVersionInternal();
-    atomic_store(cache, result, memory_order_release);
-  }
-  return result;
-}
 
 bool PlatformHasDifferentMemcpyAndMemmove() {
   // On OS X 10.7 memcpy() and memmove() are both resolved

lib/asan/asan_mac.h

@@ -36,22 +36,12 @@ typedef struct __CFRuntimeBase {
 #endif
 } CFRuntimeBase;
 
-enum MacosVersion {
-  MACOS_VERSION_UNINITIALIZED = 0,
-  MACOS_VERSION_UNKNOWN,
-  MACOS_VERSION_LEOPARD,
-  MACOS_VERSION_SNOW_LEOPARD,
-  MACOS_VERSION_LION,
-  MACOS_VERSION_MOUNTAIN_LION,
-  MACOS_VERSION_MAVERICKS
-};
 
 // Used by asan_malloc_mac.cc and asan_mac.cc
 extern "C" void __CFInitialize();
 
 namespace __asan {
 
-MacosVersion GetMacosVersion();
 void MaybeReplaceCFAllocator();
 
 }  // namespace __asan

lib/asan/asan_malloc_mac.cc

@@ -28,6 +28,7 @@
 #include "asan_report.h"
 #include "asan_stack.h"
 #include "asan_stats.h"
+#include "sanitizer_common/sanitizer_mac.h"
 
 // Similar code is used in Google Perftools,
 // http://code.google.com/p/google-perftools.

lib/sanitizer_common/sanitizer_mac.cc

@@ -7,9 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// This file is shared between AddressSanitizer and ThreadSanitizer
-// run-time libraries and implements mac-specific functions from
-// sanitizer_libc.h.
+// This file is shared between various sanitizers' runtime libraries and
+// implements OSX-specific functions.
 //===----------------------------------------------------------------------===//
 
 #include "sanitizer_platform.h"
@@ -26,6 +25,7 @@
 #include "sanitizer_flags.h"
 #include "sanitizer_internal_defs.h"
 #include "sanitizer_libc.h"
+#include "sanitizer_mac.h"
 #include "sanitizer_placement_new.h"
 #include "sanitizer_procmaps.h"
 
@@ -37,6 +37,7 @@
 #include <sys/mman.h>
 #include <sys/resource.h>
 #include <sys/stat.h>
+#include <sys/sysctl.h>
 #include <sys/types.h>
 #include <unistd.h>
 #include <libkern/OSAtomic.h>
@@ -249,6 +250,44 @@ bool IsDeadlySignal(int signum) {
   return (signum == SIGSEGV || signum == SIGBUS) && common_flags()->handle_segv;
 }
 
+MacosVersion cached_macos_version = MACOS_VERSION_UNINITIALIZED;
+
+MacosVersion GetMacosVersionInternal() {
+  int mib[2] = { CTL_KERN, KERN_OSRELEASE };
+  char version[100];
+  uptr len = 0, maxlen = sizeof(version) / sizeof(version[0]);
+  for (uptr i = 0; i < maxlen; i++) version[i] = '\0';
+  // Get the version length.
+  CHECK_NE(sysctl(mib, 2, 0, &len, 0, 0), -1);
+  CHECK_LT(len, maxlen);
+  CHECK_NE(sysctl(mib, 2, version, &len, 0, 0), -1);
+  switch (version[0]) {
+    case '9': return MACOS_VERSION_LEOPARD;
+    case '1': {
+      switch (version[1]) {
+        case '0': return MACOS_VERSION_SNOW_LEOPARD;
+        case '1': return MACOS_VERSION_LION;
+        case '2': return MACOS_VERSION_MOUNTAIN_LION;
+        case '3': return MACOS_VERSION_MAVERICKS;
+        default: return MACOS_VERSION_UNKNOWN;
+      }
+    }
+    default: return MACOS_VERSION_UNKNOWN;
+  }
+}
+
+MacosVersion GetMacosVersion() {
+  atomic_uint32_t *cache =
+      reinterpret_cast<atomic_uint32_t*>(&cached_macos_version);
+  MacosVersion result =
+      static_cast<MacosVersion>(atomic_load(cache, memory_order_acquire));
+  if (result == MACOS_VERSION_UNINITIALIZED) {
+    result = GetMacosVersionInternal();
+    atomic_store(cache, result, memory_order_release);
+  }
+  return result;
+}
+
 }  // namespace __sanitizer
 
 #endif  // SANITIZER_MAC

lib/sanitizer_common/sanitizer_mac.h

@@ -0,0 +1,32 @@
+//===-- sanitizer_mac.h -----------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is shared between various sanitizers' runtime libraries and
+// provides definitions for OSX-specific functions.
+//===----------------------------------------------------------------------===//
+#ifndef SANITIZER_MAC_H
+#define SANITIZER_MAC_H
+
+namespace __sanitizer {
+
+enum MacosVersion {
+  MACOS_VERSION_UNINITIALIZED = 0,
+  MACOS_VERSION_UNKNOWN,
+  MACOS_VERSION_LEOPARD,
+  MACOS_VERSION_SNOW_LEOPARD,
+  MACOS_VERSION_LION,
+  MACOS_VERSION_MOUNTAIN_LION,
+  MACOS_VERSION_MAVERICKS
+};
+
+MacosVersion GetMacosVersion();
+
+}  // namespace __sanitizer
+
+#endif  // SANITIZER_MAC_H