debug: cache SharedFunctionInfo for multi-bp set

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 483 matching lines @@
   // 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);
 
   // This function is used in FunctionNameUsing* tests.
   Handle<Object> FindSharedFunctionInfoInScript(Handle<Script> script,
                                                 int position);
+  bool CollectSharedFunctionInfoInScript(Handle<Script> script);
+  void ClearSharedFunctionInfoInScript();
 
   // Returns true if the current stub call is patched to call the debugger.
   static bool IsDebugBreak(Address addr);
 
   static Handle<Object> GetSourceBreakLocations(
       Handle<SharedFunctionInfo> shared,
       BreakPositionAlignment position_aligment);
 
   // Check whether a global object is the debug global object.
   bool IsDebugGlobal(GlobalObject* global);
@@ skipping 158 matching lines @@
   bool is_suppressed_;
   bool live_edit_enabled_;
   bool has_break_points_;
   bool break_disabled_;
   bool in_debug_event_listener_;
   bool break_on_exception_;
   bool break_on_uncaught_exception_;
 
   ScriptCache* script_cache_;  // Cache of all scripts in the heap.
   DebugInfoListNode* debug_info_list_;  // List of active debug info objects.
+  List<Handle<SharedFunctionInfo> > shared_info_list_;
 
   // Storage location for jump when exiting debug break calls.
   // Note that this address is not GC safe.  It should be computed immediately
   // before returning to the DebugBreakCallHelper.
   Address after_break_target_;
 
   // Per-thread data.
   class ThreadLocal {
    public:
     // Top debugger entry.
@@ skipping 147 matching lines @@
   // several frames above.
   // There is no calling conventions here, because it never actually gets
   // called, it only gets returned to.
   static void GenerateFrameDropperLiveEdit(MacroAssembler* masm);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_DEBUG_H_