Add functionality to get full stack trace when exceptions are thrown.

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 292 matching lines @@
       const Array& code_array =
           Array::Handle(isolate, Array::MakeArray(frame_builder.code_list()));
       const Array& pc_offset_array =
           Array::Handle(isolate,
                         Array::MakeArray(frame_builder.pc_offset_list()));
       if (existing_stacktrace.IsNull()) {
         stacktrace = Stacktrace::New(func_array, code_array, pc_offset_array);
       } else {
         stacktrace ^= existing_stacktrace.raw();
         stacktrace.Append(func_array, code_array, pc_offset_array);
+        // Since we are re throwing and appending to the existing stack trace
+        // we clear out the catch trace collected in the existing stack trace
+        // as that trace will not be valid anymore.
+        stacktrace.SetCatchStacktrace(Object::empty_array(),
+                                      Object::empty_array(),
+                                      Object::empty_array());
       }
     } else {
       stacktrace ^= existing_stacktrace.raw();
+      // Since we are re throwing and appending to the existing stack trace
+      // we clear out the catch trace collected in the existing stack trace
+      // as that trace will not be valid anymore.
+      stacktrace.SetCatchStacktrace(Object::empty_array(),
+                                    Object::empty_array(),
+                                    Object::empty_array());
     }
   }
   // We expect to find a handler_pc, if the exception is unhandled
   // then we expect to at least have the dart entry frame on the
   // stack as Exceptions::Throw should happen only after a dart
   // invocation has been done.
   ASSERT(handler_pc != 0);
 
   if (FLAG_print_stacktrace_at_throw) {
     OS::Print("Exception '%s' thrown:\n", exception.ToCString());
@@ skipping 263 matching lines @@
       break;
   }
 
   return DartLibraryCalls::ExceptionCreate(library,
                                            *class_name,
                                            *constructor_name,
                                            arguments);
 }
 
 }  // namespace dart