Add support to trace warnings in TraceBuffer.

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 "vm/dart_api_impl.h"
 #include "vm/dart_entry.h"
 #include "vm/debugger.h"
 #include "vm/flags.h"
@@ skipping 732 matching lines @@
   const String& msg_str = String::Handle(String::New(msg));
   exc_args.SetAt(0, msg_str);
   Exceptions::ThrowByType(Exceptions::kJavascriptCompatibilityError, exc_args);
 }
 
 
 void Exceptions::JSWarning(StackFrame* caller_frame, const char* format, ...) {
   ASSERT(caller_frame != NULL);
   ASSERT(FLAG_warn_on_javascript_compatibility);
   if (FLAG_silent_warnings) return;
-  const Code& caller_code = Code::Handle(caller_frame->LookupDartCode());
+  Isolate* isolate = Isolate::Current();
+  const Code& caller_code = Code::Handle(isolate,
+                                         caller_frame->LookupDartCode());
   ASSERT(!caller_code.IsNull());
   const uword caller_pc = caller_frame->pc();
   const intptr_t token_pos = caller_code.GetTokenIndexOfPC(caller_pc);
-  const Function& caller = Function::Handle(caller_code.function());
-  const Script& script = Script::Handle(caller.script());
+  const Function& caller = Function::Handle(isolate, caller_code.function());
+  const Script& script = Script::Handle(isolate, caller.script());
   va_list args;
   va_start(args, format);
-  const Error& error = Error::Handle(
-      LanguageError::NewFormattedV(Error::Handle(),  // No previous error.
+  const Error& error = Error::Handle(isolate,
+      LanguageError::NewFormattedV(Error::Handle(isolate),  // No prev error.
                                    script, token_pos, LanguageError::kWarning,
                                    Heap::kNew, format, args));
   va_end(args);
   if (FLAG_warning_as_error) {
     ThrowJavascriptCompatibilityError(error.ToErrorCString());
   } else {
     OS::Print("javascript compatibility warning: %s", error.ToErrorCString());
+    va_start(args, format);
+    TraceBuffer::TraceWarningV(isolate, script, token_pos, format, args);
+    va_end(args);
   }
   const Stacktrace& stacktrace =
-     Stacktrace::Handle(Exceptions::CurrentStacktrace());
+     Stacktrace::Handle(isolate, Exceptions::CurrentStacktrace());
   intptr_t idx = 0;
   OS::Print("%s",
             stacktrace.ToCStringInternal(&idx,
                                          FLAG_stacktrace_depth_on_warning));
 }
 
 }  // namespace dart