Debugger: prepare code for debugging on a per-function basis.

src/debug.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_DEBUG_H_
 #define V8_DEBUG_H_
 
 #include "src/allocation.h"
 #include "src/arguments.h"
 #include "src/assembler.h"
@@ skipping 420 matching lines @@
                    int step_count,
                    StackFrame::Id frame_id);
   void ClearStepping();
   void ClearStepOut();
   bool IsStepping() { return thread_local_.step_count_ > 0; }
   bool StepNextContinue(BreakLocation* location, JavaScriptFrame* frame);
   bool StepInActive() { return thread_local_.step_into_fp_ != 0; }
   void HandleStepIn(Handle<Object> function_obj, bool is_constructor);
   bool StepOutActive() { return thread_local_.step_out_fp_ != 0; }
 
-  // Purge all code objects that have no debug break slots.
-  void PrepareForBreakPoints();
+  void GetStepinPositions(JavaScriptFrame* frame, StackFrame::Id frame_id,
+                          List<int>* results_out);
+
+  bool PrepareFunctionForBreakPoints(Handle<SharedFunctionInfo> shared);
 
   // Returns whether the operation succeeded. Compilation can only be triggered
   // if a valid closure is passed as the second argument, otherwise the shared
   // function needs to be compiled already.
   bool EnsureDebugInfo(Handle<SharedFunctionInfo> shared,
                        Handle<JSFunction> function);
   static Handle<DebugInfo> GetDebugInfo(Handle<SharedFunctionInfo> shared);
-  static bool HasDebugInfo(Handle<SharedFunctionInfo> shared);
 
   template <typename C>
   bool CompileToRevealInnerFunctions(C* compilable);
 
   // This function is used in FunctionNameUsing* tests.
   Handle<Object> FindSharedFunctionInfoInScript(Handle<Script> script,
                                                 int position);
 
   // Returns true if the current stub call is patched to call the debugger.
   static bool IsDebugBreak(Address addr);
@@ skipping 24 matching lines @@
   void FreeThreadResources() { }
 
   // Record function from which eval was called.
   static void RecordEvalCaller(Handle<Script> script);
 
   bool CheckExecutionState(int id) {
     return is_active() && !debug_context().is_null() && break_id() != 0 &&
            break_id() == id;
   }
 
+  bool RequiresEagerCompilation(bool allows_lazy_without_ctx = false) {
+    return LiveEditFunctionTracker::IsActive(isolate_) ||
+           (is_active() && !allows_lazy_without_ctx);
+  }
+
   // Flags and states.
   DebugScope* debugger_entry() {
     return reinterpret_cast<DebugScope*>(
         base::NoBarrier_Load(&thread_local_.current_debug_scope_));
   }
   inline Handle<Context> debug_context() { return debug_context_; }
   void set_live_edit_enabled(bool v) { live_edit_enabled_ = v; }
   bool live_edit_enabled() const {
     return FLAG_enable_liveedit && live_edit_enabled_ ;
   }
 
   inline bool is_active() const { return is_active_; }
   inline bool is_loaded() const { return !debug_context_.is_null(); }
-  inline bool has_break_points() const { return has_break_points_; }
   inline bool in_debug_scope() const {
     return !!base::NoBarrier_Load(&thread_local_.current_debug_scope_);
   }
   void set_disable_break(bool v) { break_disabled_ = v; }
 
   StackFrame::Id break_frame_id() { return thread_local_.break_frame_id_; }
   int break_id() { return thread_local_.break_id_; }
 
   // Support for embedding into generated code.
   Address is_active_address() {
@@ skipping 278 matching lines @@
                            int call_argc = -1);
 
   static void PatchDebugBreakSlot(Address pc, Handle<Code> code);
   static void ClearDebugBreakSlot(Address pc);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_DEBUG_H_