- Allow any implementation of StackTrace to participate in async/

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"
@@ skipping 44 matching lines @@
  private:
   const GrowableObjectArray& code_list_;
   const GrowableObjectArray& pc_offset_list_;
 
   DISALLOW_COPY_AND_ASSIGN(RegularStacktraceBuilder);
 };
 
 
 class PreallocatedStacktraceBuilder : public StacktraceBuilder {
  public:
-  explicit PreallocatedStacktraceBuilder(const Stacktrace& stacktrace)
-      : stacktrace_(stacktrace),
+  explicit PreallocatedStacktraceBuilder(const Instance& stacktrace)
+  : stacktrace_(Stacktrace::Cast(stacktrace)),
         cur_index_(0) {
     ASSERT(stacktrace_.raw() ==
            Isolate::Current()->object_store()->preallocated_stack_trace());
   }
   ~PreallocatedStacktraceBuilder() { }
 
   virtual void AddFrame(const Code& code, const Smi& offset);
 
  private:
   static const int kNumTopframes = 3;
@@ skipping 209 matching lines @@
   const Array& full_pc_offset_array = Array::Handle(isolate,
       Array::MakeArray(frame_builder.pc_offset_list()));
   const Stacktrace& full_stacktrace = Stacktrace::Handle(
       Stacktrace::New(full_code_array, full_pc_offset_array));
   return full_stacktrace.raw();
 }
 
 
 static void ThrowExceptionHelper(Isolate* isolate,
                                  const Instance& incoming_exception,
-                                 const Stacktrace& existing_stacktrace,
+                                 const Instance& existing_stacktrace,
                                  const bool is_rethrow) {
   bool use_preallocated_stacktrace = false;
   Instance& exception = Instance::Handle(isolate, incoming_exception.raw());
   if (exception.IsNull()) {
     exception ^= Exceptions::Create(Exceptions::kNullThrown,
                                     Object::empty_array());
   } else if (exception.raw() == isolate->object_store()->out_of_memory() ||
              exception.raw() == isolate->object_store()->stack_overflow()) {
     use_preallocated_stacktrace = true;
   }
   uword handler_pc = 0;
   uword handler_sp = 0;
   uword handler_fp = 0;
-  Stacktrace& stacktrace = Stacktrace::Handle(isolate);
+  Instance& stacktrace = Instance::Handle(isolate);
   bool handler_exists = false;
   bool handler_needs_stacktrace = false;
   if (use_preallocated_stacktrace) {
     stacktrace ^= isolate->object_store()->preallocated_stack_trace();
     PreallocatedStacktraceBuilder frame_builder(stacktrace);
     handler_exists = FindExceptionHandler(isolate,
                                           &handler_pc,
                                           &handler_sp,
                                           &handler_fp,
                                           &handler_needs_stacktrace);
@@ skipping 164 matching lines @@
       exception.raw() != isolate->object_store()->stack_overflow()) {
     isolate->debugger()->SignalExceptionThrown(exception);
   }
   // Null object is a valid exception object.
   ThrowExceptionHelper(isolate, exception, Stacktrace::Handle(isolate), false);
 }
 
 
 void Exceptions::ReThrow(Isolate* isolate,
                          const Instance& exception,
-                         const Stacktrace& stacktrace) {
+                         const Instance& stacktrace) {
   // Null object is a valid exception object.
   ThrowExceptionHelper(isolate, exception, stacktrace, true);
 }
 
 
 void Exceptions::PropagateError(const Error& error) {
   Isolate* isolate = Isolate::Current();
   ASSERT(isolate->top_exit_frame_info() != 0);
   if (error.IsUnhandledException()) {
     // If the error object represents an unhandled exception, then
     // rethrow the exception in the normal fashion.
     const UnhandledException& uhe = UnhandledException::Cast(error);
     const Instance& exc = Instance::Handle(isolate, uhe.exception());
-    const Stacktrace& stk = Stacktrace::Handle(isolate, uhe.stacktrace());
+    const Instance& stk = Instance::Handle(isolate, uhe.stacktrace());
     Exceptions::ReThrow(isolate, exc, stk);
   } else {
     // Return to the invocation stub and return this error object.  The
     // C++ code which invoked this dart sequence can check and do the
     // appropriate thing.
     uword handler_pc = 0;
     uword handler_sp = 0;
     uword handler_fp = 0;
     FindErrorHandler(&handler_pc, &handler_sp, &handler_fp);
     JumpToExceptionHandler(isolate, handler_pc, handler_sp, handler_fp, error,
@@ skipping 147 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