Enable/disable LiveEdit using the (C++) debug API.

src/runtime.cc

 // Copyright 2012 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 12669 matching lines @@
     counter++;
   }
   return counter;
 }
 
 // For a script finds all SharedFunctionInfo's in the heap that points
 // to this script. Returns JSArray of SharedFunctionInfo wrapped
 // in OpaqueReferences.
 RUNTIME_FUNCTION(MaybeObject*,
                  Runtime_LiveEditFindSharedFunctionInfosForScript) {
+  CHECK(isolate->debugger()->is_live_edit_enabled());
   ASSERT(args.length() == 1);
   HandleScope scope(isolate);
   CONVERT_ARG_CHECKED(JSValue, script_value, 0);
 
 
   Handle<Script> script = Handle<Script>(Script::cast(script_value->value()));
 
   const int kBufferSize = 32;
 
   Handle<FixedArray> array;
@@ skipping 26 matching lines @@
 }
 
 // For a script calculates compilation information about all its functions.
 // The script source is explicitly specified by the second argument.
 // The source of the actual script is not used, however it is important that
 // all generated code keeps references to this particular instance of script.
 // Returns a JSArray of compilation infos. The array is ordered so that
 // each function with all its descendant is always stored in a continues range
 // with the function itself going first. The root function is a script function.
 RUNTIME_FUNCTION(MaybeObject*, Runtime_LiveEditGatherCompileInfo) {
+  CHECK(isolate->debugger()->is_live_edit_enabled());
   ASSERT(args.length() == 2);
   HandleScope scope(isolate);
   CONVERT_ARG_CHECKED(JSValue, script, 0);
   CONVERT_ARG_HANDLE_CHECKED(String, source, 1);
   Handle<Script> script_handle = Handle<Script>(Script::cast(script->value()));
 
   JSArray* result =  LiveEdit::GatherCompileInfo(script_handle, source);
 
   if (isolate->has_pending_exception()) {
     return Failure::Exception();
   }
 
   return result;
 }
 
 // Changes the source of the script to a new_source.
 // If old_script_name is provided (i.e. is a String), also creates a copy of
 // the script with its original source and sends notification to debugger.
 RUNTIME_FUNCTION(MaybeObject*, Runtime_LiveEditReplaceScript) {
+  CHECK(isolate->debugger()->is_live_edit_enabled());
   ASSERT(args.length() == 3);
   HandleScope scope(isolate);
   CONVERT_ARG_CHECKED(JSValue, original_script_value, 0);
   CONVERT_ARG_HANDLE_CHECKED(String, new_source, 1);
   Handle<Object> old_script_name(args[2], isolate);
 
   RUNTIME_ASSERT(original_script_value->value()->IsScript());
   Handle<Script> original_script(Script::cast(original_script_value->value()));
 
   Object* old_script = LiveEdit::ChangeScriptSource(original_script,
                                                     new_source,
                                                     old_script_name);
 
   if (old_script->IsScript()) {
     Handle<Script> script_handle(Script::cast(old_script));
     return *(GetScriptWrapper(script_handle));
   } else {
     return isolate->heap()->null_value();
   }
 }
 
 
 RUNTIME_FUNCTION(MaybeObject*, Runtime_LiveEditFunctionSourceUpdated) {
+  CHECK(isolate->debugger()->is_live_edit_enabled());
   ASSERT(args.length() == 1);
   HandleScope scope(isolate);
   CONVERT_ARG_HANDLE_CHECKED(JSArray, shared_info, 0);
   return LiveEdit::FunctionSourceUpdated(shared_info);
 }
 
 
 // Replaces code of SharedFunctionInfo with a new one.
 RUNTIME_FUNCTION(MaybeObject*, Runtime_LiveEditReplaceFunctionCode) {
+  CHECK(isolate->debugger()->is_live_edit_enabled());
   ASSERT(args.length() == 2);
   HandleScope scope(isolate);
   CONVERT_ARG_HANDLE_CHECKED(JSArray, new_compile_info, 0);
   CONVERT_ARG_HANDLE_CHECKED(JSArray, shared_info, 1);
 
   return LiveEdit::ReplaceFunctionCode(new_compile_info, shared_info);
 }
 
 // Connects SharedFunctionInfo to another script.
 RUNTIME_FUNCTION(MaybeObject*, Runtime_LiveEditFunctionSetScript) {
+  CHECK(isolate->debugger()->is_live_edit_enabled());
   ASSERT(args.length() == 2);
   HandleScope scope(isolate);
   Handle<Object> function_object(args[0], isolate);
   Handle<Object> script_object(args[1], isolate);
 
   if (function_object->IsJSValue()) {
     Handle<JSValue> function_wrapper = Handle<JSValue>::cast(function_object);
     if (script_object->IsJSValue()) {
       RUNTIME_ASSERT(JSValue::cast(*script_object)->value()->IsScript());
       Script* script = Script::cast(JSValue::cast(*script_object)->value());
       script_object = Handle<Object>(script, isolate);
     }
 
     LiveEdit::SetFunctionScript(function_wrapper, script_object);
   } else {
     // Just ignore this. We may not have a SharedFunctionInfo for some functions
     // and we check it in this function.
   }
 
   return isolate->heap()->undefined_value();
 }
 
 
 // In a code of a parent function replaces original function as embedded object
 // with a substitution one.
 RUNTIME_FUNCTION(MaybeObject*, Runtime_LiveEditReplaceRefToNestedFunction) {
+  CHECK(isolate->debugger()->is_live_edit_enabled());
   ASSERT(args.length() == 3);
   HandleScope scope(isolate);
 
   CONVERT_ARG_HANDLE_CHECKED(JSValue, parent_wrapper, 0);
   CONVERT_ARG_HANDLE_CHECKED(JSValue, orig_wrapper, 1);
   CONVERT_ARG_HANDLE_CHECKED(JSValue, subst_wrapper, 2);
 
   LiveEdit::ReplaceRefToNestedFunction(parent_wrapper, orig_wrapper,
                                        subst_wrapper);
 
   return isolate->heap()->undefined_value();
 }
 
 
 // Updates positions of a shared function info (first parameter) according
 // to script source change. Text change is described in second parameter as
 // array of groups of 3 numbers:
 // (change_begin, change_end, change_end_new_position).
 // Each group describes a change in text; groups are sorted by change_begin.
 RUNTIME_FUNCTION(MaybeObject*, Runtime_LiveEditPatchFunctionPositions) {
+  CHECK(isolate->debugger()->is_live_edit_enabled());
   ASSERT(args.length() == 2);
   HandleScope scope(isolate);
   CONVERT_ARG_HANDLE_CHECKED(JSArray, shared_array, 0);
   CONVERT_ARG_HANDLE_CHECKED(JSArray, position_change_array, 1);
 
   return LiveEdit::PatchFunctionPositions(shared_array, position_change_array);
 }
 
 
 // For array of SharedFunctionInfo's (each wrapped in JSValue)
 // checks that none of them have activations on stacks (of any thread).
 // Returns array of the same length with corresponding results of
 // LiveEdit::FunctionPatchabilityStatus type.
 RUNTIME_FUNCTION(MaybeObject*, Runtime_LiveEditCheckAndDropActivations) {
+  CHECK(isolate->debugger()->is_live_edit_enabled());
   ASSERT(args.length() == 2);
   HandleScope scope(isolate);
   CONVERT_ARG_HANDLE_CHECKED(JSArray, shared_array, 0);
   CONVERT_BOOLEAN_ARG_CHECKED(do_drop, 1);
 
   return *LiveEdit::CheckAndDropActivations(shared_array, do_drop,
                                             isolate->runtime_zone());
 }
 
 // Compares 2 strings line-by-line, then token-wise and returns diff in form
 // of JSArray of triplets (pos1, pos1_end, pos2_end) describing list
 // of diff chunks.
 RUNTIME_FUNCTION(MaybeObject*, Runtime_LiveEditCompareStrings) {
+  CHECK(isolate->debugger()->is_live_edit_enabled());
   ASSERT(args.length() == 2);
   HandleScope scope(isolate);
   CONVERT_ARG_HANDLE_CHECKED(String, s1, 0);
   CONVERT_ARG_HANDLE_CHECKED(String, s2, 1);
 
   return *LiveEdit::CompareStrings(s1, s2);
 }
 
 
 // Restarts a call frame and completely drops all frames above.
 // Returns true if successful. Otherwise returns undefined or an error message.
 RUNTIME_FUNCTION(MaybeObject*, Runtime_LiveEditRestartFrame) {
+  CHECK(isolate->debugger()->is_live_edit_enabled());
   HandleScope scope(isolate);
   ASSERT(args.length() == 2);
 
   // Check arguments.
   Object* check;
   { MaybeObject* maybe_check = Runtime_CheckExecutionState(
       RUNTIME_ARGUMENTS(isolate, args));
     if (!maybe_check->ToObject(&check)) return maybe_check;
   }
   CONVERT_NUMBER_CHECKED(int, index, Int32, args[1]);
@@ skipping 19 matching lines @@
   if (error_message) {
     return *(isolate->factory()->LookupAsciiSymbol(error_message));
   }
   return heap->true_value();
 }
 
 
 // A testing entry. Returns statement position which is the closest to
 // source_position.
 RUNTIME_FUNCTION(MaybeObject*, Runtime_GetFunctionCodePositionFromSource) {
+  CHECK(isolate->debugger()->is_live_edit_enabled());
   ASSERT(args.length() == 2);
   HandleScope scope(isolate);
   CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
   CONVERT_NUMBER_CHECKED(int32_t, source_position, Int32, args[1]);
 
   Handle<Code> code(function->code(), isolate);
 
   if (code->kind() != Code::FUNCTION &&
       code->kind() != Code::OPTIMIZED_FUNCTION) {
     return isolate->heap()->undefined_value();
@@ skipping 787 matching lines @@
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     isolate->counters()->gc_last_resort_from_js()->Increment();
     isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags,
                                        "Runtime::PerformGC");
   }
 }
 
 
 } }  // namespace v8::internal