Add an API function to get a debugger stack trace from an error handle.

runtime/vm/object.h

 // Copyright (c) 2012, 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.
 
 #ifndef VM_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 6054 matching lines @@
   }
   static intptr_t NextFieldOffset() {
     // Indicates this class cannot be extended by dart code.
     return -kWordSize;
   }
 
   friend class Class;
 };
 
 
+class ExceptionStackTrace;

[rmacnak, 2013/11/07 21:31:12]

Move to top of file?

+class ExceptionStackFrame;
+
 // Internal stacktrace object used in exceptions for printing stack traces.
 class Stacktrace : public Instance {
  public:
   static const int kPreallocatedStackdepth = 10;
 
   intptr_t Length() const;
 
   RawFunction* FunctionAtFrame(intptr_t frame_index) const;
 
   RawCode* CodeAtFrame(intptr_t frame_index) const;
@@ skipping 10 matching lines @@
   static intptr_t InstanceSize() {
     return RoundedAllocationSize(sizeof(RawStacktrace));
   }
   static RawStacktrace* New(const Array& code_array,
                             const Array& pc_offset_array,
                             Heap::Space space = Heap::kNew);
 
   RawString* FullStacktrace() const;
   const char* ToCStringInternal(intptr_t* frame_index) const;
 
+  ExceptionStackTrace* BuildExceptionStackTrace() const;

[rmacnak, 2013/11/07 21:31:12]

Ditto bad name.

+
  private:
   void set_code_array(const Array& code_array) const;
   void set_pc_offset_array(const Array& pc_offset_array) const;
   void set_catch_code_array(const Array& code_array) const;
   void set_catch_pc_offset_array(const Array& pc_offset_array) const;
   bool expand_inlined() const;
 
   FINAL_HEAP_OBJECT_IMPLEMENTATION(Stacktrace, Instance);
   friend class Class;
 };
 
 
+// Constructed and handed out by the API to avoid repeatedly iterating through
+// frames to expand inlined frames and skip invisible frames.
+// Cf. DebuggerStackTrace.
+class ExceptionStackTrace : public ZoneAllocated {
+ public:
+  explicit ExceptionStackTrace(int capacity)
+      : frames_(capacity) { }
+
+  intptr_t Length() const { return frames_.length(); }
+
+  ExceptionStackFrame* FrameAt(int i) const { return frames_[i]; }
+
+ private:
+  void AddFrame(ExceptionStackFrame* frame) { frames_.Add(frame); }
+  ZoneGrowableArray<ExceptionStackFrame*> frames_;
+
+  friend class Stacktrace;
+  friend class Debugger;
+  DISALLOW_COPY_AND_ASSIGN(ExceptionStackTrace);
+};
+
+
+class ExceptionStackFrame : public ZoneAllocated {
+ public:
+  explicit ExceptionStackFrame(
+    String& function_name,
+    String& script_uri,
+    intptr_t line_number,
+    intptr_t column_number)
+    : function_name_(String::ZoneHandle(function_name.raw())),
+      script_uri_(String::ZoneHandle(script_uri.raw())),
+      line_number_(line_number),
+      column_number_(column_number) { }
+
+  RawString* function_name() const { return function_name_.raw(); }
+  RawString* script_uri() const { return script_uri_.raw(); }
+  intptr_t line_number() const { return line_number_; }
+  intptr_t column_number() const { return column_number_; }
+
+ private:
+  const String& function_name_;
+  const String& script_uri_;
+  const intptr_t line_number_;
+  const intptr_t column_number_;
+
+  friend class Stacktrace;
+  DISALLOW_COPY_AND_ASSIGN(ExceptionStackFrame);
+};
+
+
 // Internal JavaScript regular expression object.
 class JSRegExp : public Instance {
  public:
   // Meaning of RegExType:
   // kUninitialized: the type of th regexp has not been initialized yet.
   // kSimple: A simple pattern to match against, using string indexOf operation.
   // kComplex: A complex pattern to match.
   enum RegExType {
     kUnitialized = 0,
     kSimple,
@@ skipping 254 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_