Debugger break on TypeError, AssertionError

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 "vm/object.h"
 
 namespace dart {
@@ skipping 147 matching lines @@
   ZoneGrowableArray<intptr_t> desc_indices_;
 
   friend class Debugger;
   DISALLOW_COPY_AND_ASSIGN(ActivationFrame);
 };
 
 
 // Array of function activations on the call stack.
 class DebuggerStackTrace : public ZoneAllocated {
  public:
-  explicit DebuggerStackTrace(int capacity) : trace_(capacity) { }
+  explicit DebuggerStackTrace(int capacity)
+      : trace_(capacity) { }
 
   intptr_t Length() const { return trace_.length(); }
 
   ActivationFrame* ActivationFrameAt(int i) const {
     ASSERT(i < trace_.length());
     return trace_[i];
   }
  private:
   void AddActivation(ActivationFrame* frame);
   ZoneGrowableArray<ActivationFrame*> trace_;
 
   friend class Debugger;
   DISALLOW_COPY_AND_ASSIGN(DebuggerStackTrace);
 };
 
 
 typedef void BreakpointHandler(SourceBreakpoint* bpt,
                                DebuggerStackTrace* stack);
 
 
 class Debugger {
  public:
   enum EventType {
-    kPaused = 1,
+    kBreakpointReached = 1,
     kBreakpointResolved = 2,
+    kExceptionThrown = 3,
   };
   struct DebuggerEvent {
     EventType type;
     union {
       DebuggerStackTrace* stack_trace;
       SourceBreakpoint* breakpoint;
+      const Object* exception;
     };
   };
   typedef void EventHandler(DebuggerEvent *event);
 
   Debugger();
   ~Debugger();
 
   void Initialize(Isolate* isolate);
   void Shutdown();
   bool IsActive();
@@ skipping 36 matching lines @@
 
   // Utility functions.
   static const char* QualifiedFunctionName(const Function& func);
 
   RawObject* GetInstanceField(const Class& cls,
                               const String& field_name,
                               const Instance& object);
   RawObject* GetStaticField(const Class& cls,
                             const String& field_name);
 
+  void SignalBpReached();
+  void SignalExceptionThrown(const Object& exc);
+
  private:
   enum ResumeAction {
     kContinue,
     kStepOver,
     kStepInto,
     kStepOut
   };
 
   void EnsureFunctionIsDeoptimized(const Function& func);
   void InstrumentForStepping(const Function& target_function);
   SourceBreakpoint* SetBreakpoint(const Function& target_function,
                                   intptr_t token_index);
   void RemoveInternalBreakpoints();
   void UnlinkCodeBreakpoints(SourceBreakpoint* src_bpt);
   void RegisterSourceBreakpoint(SourceBreakpoint* bpt);
   void RegisterCodeBreakpoint(CodeBreakpoint* bpt);
   SourceBreakpoint* GetSourceBreakpoint(const Function& func,
                                         intptr_t token_index);
   CodeBreakpoint* MakeCodeBreakpoint(const Function& func,
                                      intptr_t token_index);
 
   // Returns NULL if no breakpoint exists for the given address.
   CodeBreakpoint* GetCodeBreakpoint(uword breakpoint_address);
 
   void SyncBreakpoint(SourceBreakpoint* bpt);
 
+  DebuggerStackTrace* CollectStackTrace();
   void SignalBpResolved(SourceBreakpoint *bpt);
 
   bool IsDebuggable(const Function& func);
 
   intptr_t nextId() { return next_id_++; }
 
+  bool ShouldPauseOnException(DebuggerStackTrace* stack_trace,
+                              const Object& exc);
+
   Isolate* isolate_;
   bool initialized_;
   BreakpointHandler* bp_handler_;
   EventHandler* event_handler_;
 
   // ID number generator.
   intptr_t next_id_;
 
   // Current stack trace. Valid while executing breakpoint callback code.
   DebuggerStackTrace* stack_trace_;
 
   RemoteObjectCache* obj_cache_;
 
   SourceBreakpoint* src_breakpoints_;
   CodeBreakpoint* code_breakpoints_;
 
   // Tells debugger what to do when resuming execution after a breakpoint.
   ResumeAction resume_action_;
 
   // If >= 0, last_bpt_line contains the line number of the last breakpoint
   // location for which the breakpoint callback function was called.
   intptr_t last_bpt_line_;
 
   // Do not call back to breakpoint handler if this flag is set.
   // Effectively this means ignoring breakpoints. Set when Dart code may
   // be run as a side effect of getting values of fields.
   bool ignore_breakpoints_;
 
+  // If true, notify debug client when (unhandled) exception is thrown.
+  bool pause_on_exception_;
+  bool pause_on_unhandled_exception_;
+
   friend class SourceBreakpoint;
   DISALLOW_COPY_AND_ASSIGN(Debugger);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_DEBUGGER_H_