MemorySanitizer support.

runtime/vm/exceptions.cc

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/exceptions.h"
 
+#include "platform/address_sanitizer.h"
+
 #include "vm/dart_api_impl.h"
 #include "vm/dart_entry.h"
 #include "vm/debugger.h"
 #include "vm/flags.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
 #include "vm/stack_frame.h"
 #include "vm/stub_code.h"
 #include "vm/symbols.h"
 #include "vm/tags.h"
 
-// Allow the use of ASan (AddressSanitizer). This is needed as ASan needs to be
-// told about areas where the VM does the equivalent of a long-jump.
-#if defined(__has_feature)
-#if __has_feature(address_sanitizer)
-extern "C" void __asan_unpoison_memory_region(void *, size_t);
-#else  // __has_feature(address_sanitizer)
-void __asan_unpoison_memory_region(void* ignore1, size_t ignore2) {}
-#endif  // __has_feature(address_sanitizer)
-#else  // defined(__has_feature)
-void __asan_unpoison_memory_region(void* ignore1, size_t ignore2) {}
-#endif  // defined(__has_feature)
-
-
 namespace dart {
 
 DEFINE_FLAG(bool, print_stacktrace_at_throw, false,
             "Prints a stack trace everytime a throw occurs.");
 DEFINE_FLAG(bool, verbose_stacktrace, false,
     "Stack traces will include methods marked invisible.");
 
 
 const char* Exceptions::kCastErrorDstName = "type cast";
 
@@ skipping 262 matching lines @@
   // Call a stub to set up the exception object in kExceptionObjectReg,
   // to set up the stacktrace object in kStackTraceObjectReg, and to
   // continue execution at the given pc in the given frame.
   typedef void (*ExcpHandler)(uword, uword, uword, RawObject*, RawObject*,
                               Isolate*);
   ExcpHandler func = reinterpret_cast<ExcpHandler>(
       StubCode::JumpToExceptionHandlerEntryPoint());
 
   // Unpoison the stack before we tear it down in the generated stub code.
   uword current_sp = reinterpret_cast<uword>(&program_counter) - 1024;
-  __asan_unpoison_memory_region(reinterpret_cast<void*>(current_sp),
-                                stack_pointer - current_sp);
+  ASAN_UNPOISON(reinterpret_cast<void*>(current_sp),
+                stack_pointer - current_sp);
 
   func(program_counter, stack_pointer, frame_pointer,
        raw_exception, raw_stacktrace, isolate);
 #endif
   UNREACHABLE();
 }
 
 
 static RawField* LookupStacktraceField(const Instance& instance) {
   if (instance.GetClassId() < kNumPredefinedCids) {
@@ skipping 446 matching lines @@
 
 // Throw JavascriptCompatibilityError exception.
 void Exceptions::ThrowJavascriptCompatibilityError(const char* msg) {
   const Array& exc_args = Array::Handle(Array::New(1));
   const String& msg_str = String::Handle(String::New(msg));
   exc_args.SetAt(0, msg_str);
   Exceptions::ThrowByType(Exceptions::kJavascriptCompatibilityError, exc_args);
 }
 
 }  // namespace dart