[inspector] fix timestamp formatting with non C locales

test/inspector/inspector-test.cc

 // Copyright 2016 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.
 
 #if !defined(_WIN32) && !defined(_WIN64)
 #include <unistd.h>  // NOLINT
 #endif               // !defined(_WIN32) && !defined(_WIN64)
 
+#include <locale.h>
+
 #include "include/libplatform/libplatform.h"
 #include "include/v8.h"
 
 #include "src/base/platform/platform.h"
 #include "src/flags.h"
 #include "src/utils.h"
 #include "src/vector.h"
 
 #include "test/inspector/inspector-impl.h"
 #include "test/inspector/task-runner.h"
 
 namespace {
 
 void Exit() {
   fflush(stdout);
   fflush(stderr);
   _exit(0);
 }
 
 class UtilsExtension : public v8::Extension {
  public:
   UtilsExtension()
       : v8::Extension("v8_inspector/utils",
-                      "native function print(); native function quit();") {}
+                      "native function print();"
+                      "native function quit();"
+                      "native function setlocale();") {}
   virtual v8::Local<v8::FunctionTemplate> GetNativeFunctionTemplate(
       v8::Isolate* isolate, v8::Local<v8::String> name) {
     v8::Local<v8::Context> context = isolate->GetCurrentContext();
     if (name->Equals(context, v8::String::NewFromUtf8(
                                   isolate, "print", v8::NewStringType::kNormal)
                                   .ToLocalChecked())
             .FromJust()) {
       return v8::FunctionTemplate::New(isolate, UtilsExtension::Print);
     } else if (name->Equals(context,
                             v8::String::NewFromUtf8(isolate, "quit",
                                                     v8::NewStringType::kNormal)
                                 .ToLocalChecked())
                    .FromJust()) {
       return v8::FunctionTemplate::New(isolate, UtilsExtension::Quit);
+    } else if (name->Equals(context,
+                            v8::String::NewFromUtf8(isolate, "setlocale",
+                                                    v8::NewStringType::kNormal)
+                                .ToLocalChecked())
+                   .FromJust()) {
+      return v8::FunctionTemplate::New(isolate, UtilsExtension::SetLocale);
     }
     return v8::Local<v8::FunctionTemplate>();
   }
 
  private:
   static void Print(const v8::FunctionCallbackInfo<v8::Value>& args) {
     for (int i = 0; i < args.Length(); i++) {
       v8::HandleScope handle_scope(args.GetIsolate());
       if (i != 0) {
         printf(" ");
@@ skipping 19 matching lines @@
       if (n != str.length()) {
         printf("Error in fwrite\n");
         Quit(args);
       }
     }
     printf("\n");
     fflush(stdout);
   }
 
   static void Quit(const v8::FunctionCallbackInfo<v8::Value>& args) { Exit(); }
+
+  static void SetLocale(const v8::FunctionCallbackInfo<v8::Value>& args) {
+    if (args.Length() != 1 || !args[0]->IsString()) {
+      fprintf(stderr, "Internal error: setlocale get one string argument.");
+      Exit();
+    }
+    v8::String::Utf8Value str(args[0]);
+    setlocale(LC_NUMERIC, *str);
+  }
 };
 
 class SetTimeoutTask : public TaskRunner::Task {
  public:
   SetTimeoutTask(v8::Isolate* isolate, v8::Local<v8::Function> function)
       : function_(isolate, function) {}
   virtual ~SetTimeoutTask() {}
 
   bool is_inspector_task() final { return false; }
 
@@ skipping 147 matching lines @@
       fprintf(stderr, "Internal error: script file doesn't exists: %s\n",
               argv[i]);
       Exit();
     }
     frontend_runner.Append(new ExecuteStringTask(chars));
   }
 
   frontend_runner.Join();
   return 0;
 }