Remove usage of Locker/Unlocker where possible.

This is possible because we removed DebuggerAgent.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/286903004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21424 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

samples/lineprocessor.cc

@@ -69,25 +69,6 @@ while (true) {
   var res = line + " | " + line;
   print(res);
 }
-
- *
- * When run with "-p" argument, the program starts V8 Debugger Agent and
- * allows remote debugger to attach and debug JavaScript code.
- *
- * Interesting aspects:
- * 1. Wait for remote debugger to attach
- * Normally the program compiles custom script and immediately runs it.
- * If programmer needs to debug script from the very beginning, he should
- * run this sample program with "--wait-for-connection" command line parameter.
- * This way V8 will suspend on the first statement and wait for
- * debugger to attach.
- *
- * 2. Unresponsive V8
- * V8 Debugger Agent holds a connection with remote debugger, but it does
- * respond only when V8 is running some script. In particular, when this program
- * is waiting for input, all requests from debugger get deferred until V8
- * is called again. See how "--callback" command-line parameter in this sample
- * fixes this issue.
  */
 
 enum MainCycleType {
@@ -113,7 +94,6 @@ int RunMain(int argc, char* argv[]) {
   v8::V8::SetFlagsFromCommandLine(&argc, argv, true);
   v8::Isolate* isolate = v8::Isolate::New();
   v8::Isolate::Scope isolate_scope(isolate);
-  v8::Locker locker(isolate);
   v8::HandleScope handle_scope(isolate);
 
   v8::Handle<v8::String> script_source;
@@ -224,7 +204,6 @@ bool RunCppCycle(v8::Handle<v8::Script> script,
                  v8::Local<v8::Context> context,
                  bool report_exceptions) {
   v8::Isolate* isolate = context->GetIsolate();
-  v8::Locker lock(isolate);
 
   v8::Handle<v8::String> fun_name =
       v8::String::NewFromUtf8(isolate, "ProcessLine");
@@ -382,7 +361,6 @@ v8::Handle<v8::String> ReadLine() {
 
   char* res;
   {
-    v8::Unlocker unlocker(v8::Isolate::GetCurrent());
     res = fgets(buffer, kBufferSize, stdin);
   }
   v8::Isolate* isolate = v8::Isolate::GetCurrent();

src/d8-readline.cc

@@ -82,10 +82,7 @@ bool ReadLineEditor::Close() {
 
 Handle<String> ReadLineEditor::Prompt(const char* prompt) {
   char* result = NULL;
-  {  // Release lock for blocking input.
-    Unlocker unlock(isolate_);
-    result = readline(prompt);
-  }
+  result = readline(prompt);
   if (result == NULL) return Handle<String>();
   AddHistory(result);
   return String::NewFromUtf8(isolate_, result);
@@ -123,7 +120,6 @@ char* ReadLineEditor::CompletionGenerator(const char* text, int state) {
   static unsigned current_index;
   static Persistent<Array> current_completions;
   Isolate* isolate = read_line_editor.isolate_;
-  Locker lock(isolate);
   HandleScope scope(isolate);
   Handle<Array> completions;
   if (state == 0) {

src/d8.cc

@@ -472,10 +472,7 @@ Handle<String> Shell::ReadFromStdin(Isolate* isolate) {
     // not been fully read into the buffer yet (does not end with '\n').
     // If fgets gets an error, just give up.
     char* input = NULL;
-    {  // Release lock for blocking input.
-      Unlocker unlock(isolate);
-      input = fgets(buffer, kBufferSize, stdin);
-    }
+    input = fgets(buffer, kBufferSize, stdin);
     if (input == NULL) return Handle<String>();
     length = static_cast<int>(strlen(buffer));
     if (length == 0) {
@@ -737,7 +734,6 @@ void Shell::AddHistogramSample(void* histogram, int sample) {
 
 
 void Shell::InstallUtilityScript(Isolate* isolate) {
-  Locker lock(isolate);
   HandleScope scope(isolate);
   // If we use the utility context, we have to set the security tokens so that
   // utility, evaluation and debug context can all access each other.
@@ -904,7 +900,6 @@ void Shell::Initialize(Isolate* isolate) {
 void Shell::InitializeDebugger(Isolate* isolate) {
   if (options.test_shell) return;
 #ifndef V8_SHARED
-  Locker lock(isolate);
   HandleScope scope(isolate);
   Handle<ObjectTemplate> global_template = CreateGlobalTemplate(isolate);
   utility_context_.Reset(isolate,
@@ -1031,8 +1026,6 @@ static FILE* FOpen(const char* path, const char* mode) {
 
 
 static char* ReadChars(Isolate* isolate, const char* name, int* size_out) {
-  // Release the V8 lock while reading files.
-  v8::Unlocker unlocker(isolate);
   FILE* file = FOpen(name, "rb");
   if (file == NULL) return NULL;
 
@@ -1112,7 +1105,6 @@ Handle<String> Shell::ReadFile(Isolate* isolate, const char* name) {
 
 
 void Shell::RunShell(Isolate* isolate) {
-  Locker locker(isolate);
   HandleScope outer_scope(isolate);
   v8::Local<v8::Context> context =
       v8::Local<v8::Context>::New(isolate, evaluation_context_);
@@ -1204,7 +1196,6 @@ void SourceGroup::ExecuteInThread() {
     next_semaphore_.Wait();
     {
       Isolate::Scope iscope(isolate);
-      Locker lock(isolate);
       {
         HandleScope scope(isolate);
         PerIsolateData data(isolate);
@@ -1351,34 +1342,31 @@ int Shell::RunMain(Isolate* isolate, int argc, char* argv[]) {
     options.isolate_sources[i].StartExecuteInThread();
   }
 #endif  // !V8_SHARED
-  {  // NOLINT
-    Locker lock(isolate);
-    {
-      HandleScope scope(isolate);
-      Local<Context> context = CreateEvaluationContext(isolate);
-      if (options.last_run) {
-        // Keep using the same context in the interactive shell.
-        evaluation_context_.Reset(isolate, context);
+  {
+    HandleScope scope(isolate);
+    Local<Context> context = CreateEvaluationContext(isolate);
+    if (options.last_run) {
+      // Keep using the same context in the interactive shell.
+      evaluation_context_.Reset(isolate, context);
 #ifndef V8_SHARED
-        // If the interactive debugger is enabled make sure to activate
-        // it before running the files passed on the command line.
-        if (i::FLAG_debugger) {
-          InstallUtilityScript(isolate);
-        }
-#endif  // !V8_SHARED
-      }
-      {
-        Context::Scope cscope(context);
-        PerIsolateData::RealmScope realm_scope(PerIsolateData::Get(isolate));
-        options.isolate_sources[0].Execute(isolate);
+      // If the interactive debugger is enabled make sure to activate
+      // it before running the files passed on the command line.
+      if (i::FLAG_debugger) {
+        InstallUtilityScript(isolate);
       }
+#endif  // !V8_SHARED
     }
-    if (!options.last_run) {
-      if (options.send_idle_notification) {
-        const int kLongIdlePauseInMs = 1000;
-        V8::ContextDisposedNotification();
-        V8::IdleNotification(kLongIdlePauseInMs);
-      }
+    {
+      Context::Scope cscope(context);
+      PerIsolateData::RealmScope realm_scope(PerIsolateData::Get(isolate));
+      options.isolate_sources[0].Execute(isolate);
+    }
+  }
+  if (!options.last_run) {
+    if (options.send_idle_notification) {
+      const int kLongIdlePauseInMs = 1000;
+      V8::ContextDisposedNotification();
+      V8::IdleNotification(kLongIdlePauseInMs);
     }
   }