More precise break points and stepping when debugging...

src/codegen.cc

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 397 matching lines @@
   if (lit->IsTrue()) {
     return ALWAYS_TRUE;
   } else if (lit->IsFalse()) {
     return ALWAYS_FALSE;
   }
 
   return DONT_KNOW;
 }
 
 
-void CodeGenerator::RecordPositions(MacroAssembler* masm, int pos) {
+bool CodeGenerator::RecordPositions(MacroAssembler* masm,
+                                    int pos,
+                                    bool right_here) {
   if (pos != RelocInfo::kNoPosition) {
     masm->RecordStatementPosition(pos);
     masm->RecordPosition(pos);
+    if (right_here) {
+      return masm->WriteRecordedPositions();
+    }
   }
+  return false;
 }
 
 
 void CodeGenerator::CodeForFunctionPosition(FunctionLiteral* fun) {
-  if (FLAG_debug_info) RecordPositions(masm(), fun->start_position());
+  if (FLAG_debug_info) RecordPositions(masm(), fun->start_position(), false);
 }
 
 
 void CodeGenerator::CodeForReturnPosition(FunctionLiteral* fun) {
-  if (FLAG_debug_info) RecordPositions(masm(), fun->end_position());
+  if (FLAG_debug_info) RecordPositions(masm(), fun->end_position(), false);
 }
 
 
 void CodeGenerator::CodeForStatementPosition(Statement* stmt) {
-  if (FLAG_debug_info) RecordPositions(masm(), stmt->statement_pos());
+  if (FLAG_debug_info) RecordPositions(masm(), stmt->statement_pos(), false);
 }
 
+
 void CodeGenerator::CodeForDoWhileConditionPosition(DoWhileStatement* stmt) {
-  if (FLAG_debug_info) RecordPositions(masm(), stmt->condition_position());
+  if (FLAG_debug_info)
+    RecordPositions(masm(), stmt->condition_position(), false);
 }
 
+
 void CodeGenerator::CodeForSourcePosition(int pos) {
   if (FLAG_debug_info && pos != RelocInfo::kNoPosition) {
     masm()->RecordPosition(pos);
   }
 }
 
 
 const char* GenericUnaryOpStub::GetName() {
   switch (op_) {
     case Token::SUB:
@@ skipping 40 matching lines @@
   }
 }
 
 
 void ApiGetterEntryStub::SetCustomCache(Code* value) {
   info()->set_load_stub_cache(value);
 }
 
 
 } }  // namespace v8::internal