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

runtime/vm/debugger.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_DEBUGGER_H_
 #define VM_DEBUGGER_H_
 
 #include "include/dart_debugger_api.h"
 
 #include "vm/object.h"
@@ skipping 126 matching lines @@
     ASSERT(!code_.IsNull());
     return code_;
   }
 
   RawString* QualifiedFunctionName();
   RawString* SourceUrl();
   RawScript* SourceScript();
   RawLibrary* Library();
   intptr_t TokenPos();
   intptr_t LineNumber();
+  intptr_t ColumnNumber();
   void SetContext(const Context& ctx) { ctx_ = ctx.raw(); }
 
   // Returns true if this frame is for a function that is visible
   // to the user and can be debugged.
   bool IsDebuggable() const;
 
   // The context level of a frame is the context level at the
   // PC/token index of the frame. It determines the depth of the context
   // chain that belongs to the function of this activation frame.
   intptr_t ContextLevel();
@@ skipping 32 matching lines @@
   uword fp_;
   uword sp_;
 
   // The anchor of the context chain for this function.
   Context& ctx_;
   const Code& code_;
   const Function& function_;
   intptr_t token_pos_;
   intptr_t pc_desc_index_;
   intptr_t line_number_;
+  intptr_t column_number_;
   intptr_t context_level_;
 
   // Some frames are deoptimized into a side array in order to inspect them.
   const Array& deopt_frame_;
   const intptr_t deopt_frame_offset_;
 
   bool vars_initialized_;
   LocalVarDescriptors& var_descriptors_;
   ZoneGrowableArray<intptr_t> desc_indices_;
   PcDescriptors& pc_desc_;
@@ skipping 84 matching lines @@
 
   void VisitObjectPointers(ObjectPointerVisitor* visitor);
 
   // Called from Runtime when a breakpoint in Dart code is reached.
   void BreakpointCallback();
 
   // Returns true if there is at least one breakpoint set in func.
   // Checks for both user-defined and internal temporary breakpoints.
   bool HasBreakpoint(const Function& func);
 
+  // Returns a stack trace with frames corresponding to invisible functions
+  // omitted. CurrentStackTrace always returns a new trace on the current stack.
+  // The trace returned by StackTrace may have been cached; it is suitable for
+  // use when stepping, but otherwise may be out of sync with the current stack.
   DebuggerStackTrace* StackTrace();
+  DebuggerStackTrace* CurrentStackTrace();
+
+  // Returns a debugger stack trace corresponding to a dart.core.Stacktrace.
+  // Frames corresponding to invisible functions are omitted. It is not valid
+  // to query local variables in the returned stack.
+  DebuggerStackTrace* StackTraceFrom(const Stacktrace& dart_stacktrace);
 
   RawArray* GetInstanceFields(const Instance& obj);
   RawArray* GetStaticFields(const Class& cls);
   RawArray* GetLibraryFields(const Library& lib);
   RawArray* GetGlobalFields(const Library& lib);
 
   intptr_t CacheObject(const Object& obj);
   RawObject* GetCachedObject(intptr_t obj_id);
   bool IsValidObjectId(intptr_t obj_id);
 
@@ skipping 110 matching lines @@
 
   friend class Isolate;
   friend class SourceBreakpoint;
   DISALLOW_COPY_AND_ASSIGN(Debugger);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_DEBUGGER_H_