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

runtime/vm/object.h

Index: runtime/vm/object.h
diff --git a/runtime/vm/object.h b/runtime/vm/object.h
index 2b48af202dbbf4498e861ec9c1c2278584697b20..a90838e0a514a6a15079429c0467f5000790e82c 100644
--- a/runtime/vm/object.h
+++ b/runtime/vm/object.h
@@ -6072,6 +6072,9 @@ class Closure : public AllStatic {
 };
 
 
+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:
@@ -6102,6 +6105,8 @@ class Stacktrace : public Instance {
   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;
@@ -6114,6 +6119,56 @@ class Stacktrace : public Instance {
 };
 
 
+// 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: