1// Copyright 2012 the V8 project authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5
6// Defined when linking against shared lib on Windows.
7#if defined(USING_V8_SHARED) && !defined(V8_SHARED)
8#define V8_SHARED
9#endif
10
11#ifdef COMPRESS_STARTUP_DATA_BZ2
12#include <bzlib.h>
13#endif
14
15#include <errno.h>
16#include <stdlib.h>
17#include <string.h>
18#include <sys/stat.h>
19
20#ifdef V8_SHARED
21#include <assert.h>
22#endif  // V8_SHARED
23
24#ifndef V8_SHARED
25#include <algorithm>
26#endif  // !V8_SHARED
27
28#ifdef V8_SHARED
29#include "include/v8-testing.h"
30#endif  // V8_SHARED
31
32#if !defined(V8_SHARED) && defined(ENABLE_GDB_JIT_INTERFACE)
33#include "src/gdb-jit.h"
34#endif
35
36#ifdef ENABLE_VTUNE_JIT_INTERFACE
37#include "src/third_party/vtune/v8-vtune.h"
38#endif
39
40#include "src/d8.h"
41
42#include "include/libplatform/libplatform.h"
43#ifndef V8_SHARED
44#include "src/api.h"
45#include "src/base/cpu.h"
46#include "src/base/logging.h"
47#include "src/base/platform/platform.h"
48#include "src/base/sys-info.h"
49#include "src/d8-debug.h"
50#include "src/debug.h"
51#include "src/natives.h"
52#include "src/v8.h"
53#endif  // !V8_SHARED
54
55#if !defined(_WIN32) && !defined(_WIN64)
56#include <unistd.h>  // NOLINT
57#else
58#include <windows.h>  // NOLINT
59#if defined(_MSC_VER)
60#include <crtdbg.h>  // NOLINT
61#endif               // defined(_MSC_VER)
62#endif               // !defined(_WIN32) && !defined(_WIN64)
63
64#ifndef DCHECK
65#define DCHECK(condition) assert(condition)
66#endif
67
68namespace v8 {
69
70
71static Handle<Value> Throw(Isolate* isolate, const char* message) {
72  return isolate->ThrowException(String::NewFromUtf8(isolate, message));
73}
74
75
76
77class PerIsolateData {
78 public:
79  explicit PerIsolateData(Isolate* isolate) : isolate_(isolate), realms_(NULL) {
80    HandleScope scope(isolate);
81    isolate->SetData(0, this);
82  }
83
84  ~PerIsolateData() {
85    isolate_->SetData(0, NULL);  // Not really needed, just to be sure...
86  }
87
88  inline static PerIsolateData* Get(Isolate* isolate) {
89    return reinterpret_cast<PerIsolateData*>(isolate->GetData(0));
90  }
91
92  class RealmScope {
93   public:
94    explicit RealmScope(PerIsolateData* data);
95    ~RealmScope();
96   private:
97    PerIsolateData* data_;
98  };
99
100 private:
101  friend class Shell;
102  friend class RealmScope;
103  Isolate* isolate_;
104  int realm_count_;
105  int realm_current_;
106  int realm_switch_;
107  Persistent<Context>* realms_;
108  Persistent<Value> realm_shared_;
109
110  int RealmIndexOrThrow(const v8::FunctionCallbackInfo<v8::Value>& args,
111                        int arg_offset);
112  int RealmFind(Handle<Context> context);
113};
114
115
116LineEditor *LineEditor::current_ = NULL;
117
118
119LineEditor::LineEditor(Type type, const char* name)
120    : type_(type), name_(name) {
121  if (current_ == NULL || current_->type_ < type) current_ = this;
122}
123
124
125class DumbLineEditor: public LineEditor {
126 public:
127  explicit DumbLineEditor(Isolate* isolate)
128      : LineEditor(LineEditor::DUMB, "dumb"), isolate_(isolate) { }
129  virtual Handle<String> Prompt(const char* prompt);
130 private:
131  Isolate* isolate_;
132};
133
134
135Handle<String> DumbLineEditor::Prompt(const char* prompt) {
136  printf("%s", prompt);
137#if defined(__native_client__)
138  // Native Client libc is used to being embedded in Chrome and
139  // has trouble recognizing when to flush.
140  fflush(stdout);
141#endif
142  return Shell::ReadFromStdin(isolate_);
143}
144
145
146#ifndef V8_SHARED
147CounterMap* Shell::counter_map_;
148base::OS::MemoryMappedFile* Shell::counters_file_ = NULL;
149CounterCollection Shell::local_counters_;
150CounterCollection* Shell::counters_ = &local_counters_;
151base::Mutex Shell::context_mutex_;
152const base::TimeTicks Shell::kInitialTicks =
153    base::TimeTicks::HighResolutionNow();
154Persistent<Context> Shell::utility_context_;
155#endif  // !V8_SHARED
156
157Persistent<Context> Shell::evaluation_context_;
158ShellOptions Shell::options;
159const char* Shell::kPrompt = "d8> ";
160
161
162#ifndef V8_SHARED
163const int MB = 1024 * 1024;
164
165bool CounterMap::Match(void* key1, void* key2) {
166  const char* name1 = reinterpret_cast<const char*>(key1);
167  const char* name2 = reinterpret_cast<const char*>(key2);
168  return strcmp(name1, name2) == 0;
169}
170#endif  // !V8_SHARED
171
172
173// Converts a V8 value to a C string.
174const char* Shell::ToCString(const v8::String::Utf8Value& value) {
175  return *value ? *value : "<string conversion failed>";
176}
177
178
179// Compile a string within the current v8 context.
180Local<UnboundScript> Shell::CompileString(
181    Isolate* isolate, Local<String> source, Local<Value> name,
182    v8::ScriptCompiler::CompileOptions compile_options) {
183  ScriptOrigin origin(name);
184  ScriptCompiler::Source script_source(source, origin);
185  Local<UnboundScript> script =
186      ScriptCompiler::CompileUnbound(isolate, &script_source, compile_options);
187
188  // Was caching requested & successful? Then compile again, now with cache.
189  if (script_source.GetCachedData()) {
190    if (compile_options == ScriptCompiler::kProduceCodeCache) {
191      compile_options = ScriptCompiler::kConsumeCodeCache;
192    } else if (compile_options == ScriptCompiler::kProduceParserCache) {
193      compile_options = ScriptCompiler::kConsumeParserCache;
194    } else {
195      DCHECK(false);  // A new compile option?
196    }
197    ScriptCompiler::Source cached_source(
198        source, origin, new v8::ScriptCompiler::CachedData(
199                            script_source.GetCachedData()->data,
200                            script_source.GetCachedData()->length,
201                            v8::ScriptCompiler::CachedData::BufferNotOwned));
202    script = ScriptCompiler::CompileUnbound(isolate, &cached_source,
203                                            compile_options);
204  }
205  return script;
206}
207
208
209// Executes a string within the current v8 context.
210bool Shell::ExecuteString(Isolate* isolate,
211                          Handle<String> source,
212                          Handle<Value> name,
213                          bool print_result,
214                          bool report_exceptions) {
215#ifndef V8_SHARED
216  bool FLAG_debugger = i::FLAG_debugger;
217#else
218  bool FLAG_debugger = false;
219#endif  // !V8_SHARED
220  HandleScope handle_scope(isolate);
221  TryCatch try_catch;
222  options.script_executed = true;
223  if (FLAG_debugger) {
224    // When debugging make exceptions appear to be uncaught.
225    try_catch.SetVerbose(true);
226  }
227
228  Handle<UnboundScript> script =
229      Shell::CompileString(isolate, source, name, options.compile_options);
230  if (script.IsEmpty()) {
231    // Print errors that happened during compilation.
232    if (report_exceptions && !FLAG_debugger)
233      ReportException(isolate, &try_catch);
234    return false;
235  } else {
236    PerIsolateData* data = PerIsolateData::Get(isolate);
237    Local<Context> realm =
238        Local<Context>::New(isolate, data->realms_[data->realm_current_]);
239    realm->Enter();
240    Handle<Value> result = script->BindToCurrentContext()->Run();
241    realm->Exit();
242    data->realm_current_ = data->realm_switch_;
243    if (result.IsEmpty()) {
244      DCHECK(try_catch.HasCaught());
245      // Print errors that happened during execution.
246      if (report_exceptions && !FLAG_debugger)
247        ReportException(isolate, &try_catch);
248      return false;
249    } else {
250      DCHECK(!try_catch.HasCaught());
251      if (print_result) {
252#if !defined(V8_SHARED)
253        if (options.test_shell) {
254#endif
255          if (!result->IsUndefined()) {
256            // If all went well and the result wasn't undefined then print
257            // the returned value.
258            v8::String::Utf8Value str(result);
259            fwrite(*str, sizeof(**str), str.length(), stdout);
260            printf("\n");
261          }
262#if !defined(V8_SHARED)
263        } else {
264          v8::TryCatch try_catch;
265          v8::Local<v8::Context> context =
266              v8::Local<v8::Context>::New(isolate, utility_context_);
267          v8::Context::Scope context_scope(context);
268          Handle<Object> global = context->Global();
269          Handle<Value> fun =
270              global->Get(String::NewFromUtf8(isolate, "Stringify"));
271          Handle<Value> argv[1] = { result };
272          Handle<Value> s = Handle<Function>::Cast(fun)->Call(global, 1, argv);
273          if (try_catch.HasCaught()) return true;
274          v8::String::Utf8Value str(s);
275          fwrite(*str, sizeof(**str), str.length(), stdout);
276          printf("\n");
277        }
278#endif
279      }
280      return true;
281    }
282  }
283}
284
285
286PerIsolateData::RealmScope::RealmScope(PerIsolateData* data) : data_(data) {
287  data_->realm_count_ = 1;
288  data_->realm_current_ = 0;
289  data_->realm_switch_ = 0;
290  data_->realms_ = new Persistent<Context>[1];
291  data_->realms_[0].Reset(data_->isolate_,
292                          data_->isolate_->GetEnteredContext());
293}
294
295
296PerIsolateData::RealmScope::~RealmScope() {
297  // Drop realms to avoid keeping them alive.
298  for (int i = 0; i < data_->realm_count_; ++i)
299    data_->realms_[i].Reset();
300  delete[] data_->realms_;
301  if (!data_->realm_shared_.IsEmpty())
302    data_->realm_shared_.Reset();
303}
304
305
306int PerIsolateData::RealmFind(Handle<Context> context) {
307  for (int i = 0; i < realm_count_; ++i) {
308    if (realms_[i] == context) return i;
309  }
310  return -1;
311}
312
313
314int PerIsolateData::RealmIndexOrThrow(
315    const v8::FunctionCallbackInfo<v8::Value>& args,
316    int arg_offset) {
317  if (args.Length() < arg_offset || !args[arg_offset]->IsNumber()) {
318    Throw(args.GetIsolate(), "Invalid argument");
319    return -1;
320  }
321  int index = args[arg_offset]->Int32Value();
322  if (index < 0 ||
323      index >= realm_count_ ||
324      realms_[index].IsEmpty()) {
325    Throw(args.GetIsolate(), "Invalid realm index");
326    return -1;
327  }
328  return index;
329}
330
331
332#ifndef V8_SHARED
333// performance.now() returns a time stamp as double, measured in milliseconds.
334// When FLAG_verify_predictable mode is enabled it returns current value
335// of Heap::allocations_count().
336void Shell::PerformanceNow(const v8::FunctionCallbackInfo<v8::Value>& args) {
337  if (i::FLAG_verify_predictable) {
338    Isolate* v8_isolate = args.GetIsolate();
339    i::Heap* heap = reinterpret_cast<i::Isolate*>(v8_isolate)->heap();
340    args.GetReturnValue().Set(heap->synthetic_time());
341  } else {
342    base::TimeDelta delta =
343        base::TimeTicks::HighResolutionNow() - kInitialTicks;
344    args.GetReturnValue().Set(delta.InMillisecondsF());
345  }
346}
347#endif  // !V8_SHARED
348
349
350// Realm.current() returns the index of the currently active realm.
351void Shell::RealmCurrent(const v8::FunctionCallbackInfo<v8::Value>& args) {
352  Isolate* isolate = args.GetIsolate();
353  PerIsolateData* data = PerIsolateData::Get(isolate);
354  int index = data->RealmFind(isolate->GetEnteredContext());
355  if (index == -1) return;
356  args.GetReturnValue().Set(index);
357}
358
359
360// Realm.owner(o) returns the index of the realm that created o.
361void Shell::RealmOwner(const v8::FunctionCallbackInfo<v8::Value>& args) {
362  Isolate* isolate = args.GetIsolate();
363  PerIsolateData* data = PerIsolateData::Get(isolate);
364  if (args.Length() < 1 || !args[0]->IsObject()) {
365    Throw(args.GetIsolate(), "Invalid argument");
366    return;
367  }
368  int index = data->RealmFind(args[0]->ToObject()->CreationContext());
369  if (index == -1) return;
370  args.GetReturnValue().Set(index);
371}
372
373
374// Realm.global(i) returns the global object of realm i.
375// (Note that properties of global objects cannot be read/written cross-realm.)
376void Shell::RealmGlobal(const v8::FunctionCallbackInfo<v8::Value>& args) {
377  PerIsolateData* data = PerIsolateData::Get(args.GetIsolate());
378  int index = data->RealmIndexOrThrow(args, 0);
379  if (index == -1) return;
380  args.GetReturnValue().Set(
381      Local<Context>::New(args.GetIsolate(), data->realms_[index])->Global());
382}
383
384
385// Realm.create() creates a new realm and returns its index.
386void Shell::RealmCreate(const v8::FunctionCallbackInfo<v8::Value>& args) {
387  Isolate* isolate = args.GetIsolate();
388  PerIsolateData* data = PerIsolateData::Get(isolate);
389  Persistent<Context>* old_realms = data->realms_;
390  int index = data->realm_count_;
391  data->realms_ = new Persistent<Context>[++data->realm_count_];
392  for (int i = 0; i < index; ++i) {
393    data->realms_[i].Reset(isolate, old_realms[i]);
394  }
395  delete[] old_realms;
396  Handle<ObjectTemplate> global_template = CreateGlobalTemplate(isolate);
397  data->realms_[index].Reset(
398      isolate, Context::New(isolate, NULL, global_template));
399  args.GetReturnValue().Set(index);
400}
401
402
403// Realm.dispose(i) disposes the reference to the realm i.
404void Shell::RealmDispose(const v8::FunctionCallbackInfo<v8::Value>& args) {
405  Isolate* isolate = args.GetIsolate();
406  PerIsolateData* data = PerIsolateData::Get(isolate);
407  int index = data->RealmIndexOrThrow(args, 0);
408  if (index == -1) return;
409  if (index == 0 ||
410      index == data->realm_current_ || index == data->realm_switch_) {
411    Throw(args.GetIsolate(), "Invalid realm index");
412    return;
413  }
414  data->realms_[index].Reset();
415}
416
417
418// Realm.switch(i) switches to the realm i for consecutive interactive inputs.
419void Shell::RealmSwitch(const v8::FunctionCallbackInfo<v8::Value>& args) {
420  Isolate* isolate = args.GetIsolate();
421  PerIsolateData* data = PerIsolateData::Get(isolate);
422  int index = data->RealmIndexOrThrow(args, 0);
423  if (index == -1) return;
424  data->realm_switch_ = index;
425}
426
427
428// Realm.eval(i, s) evaluates s in realm i and returns the result.
429void Shell::RealmEval(const v8::FunctionCallbackInfo<v8::Value>& args) {
430  Isolate* isolate = args.GetIsolate();
431  PerIsolateData* data = PerIsolateData::Get(isolate);
432  int index = data->RealmIndexOrThrow(args, 0);
433  if (index == -1) return;
434  if (args.Length() < 2 || !args[1]->IsString()) {
435    Throw(args.GetIsolate(), "Invalid argument");
436    return;
437  }
438  ScriptCompiler::Source script_source(args[1]->ToString());
439  Handle<UnboundScript> script = ScriptCompiler::CompileUnbound(
440      isolate, &script_source);
441  if (script.IsEmpty()) return;
442  Local<Context> realm = Local<Context>::New(isolate, data->realms_[index]);
443  realm->Enter();
444  Handle<Value> result = script->BindToCurrentContext()->Run();
445  realm->Exit();
446  args.GetReturnValue().Set(result);
447}
448
449
450// Realm.shared is an accessor for a single shared value across realms.
451void Shell::RealmSharedGet(Local<String> property,
452                           const PropertyCallbackInfo<Value>& info) {
453  Isolate* isolate = info.GetIsolate();
454  PerIsolateData* data = PerIsolateData::Get(isolate);
455  if (data->realm_shared_.IsEmpty()) return;
456  info.GetReturnValue().Set(data->realm_shared_);
457}
458
459void Shell::RealmSharedSet(Local<String> property,
460                           Local<Value> value,
461                           const PropertyCallbackInfo<void>& info) {
462  Isolate* isolate = info.GetIsolate();
463  PerIsolateData* data = PerIsolateData::Get(isolate);
464  data->realm_shared_.Reset(isolate, value);
465}
466
467
468void Shell::Print(const v8::FunctionCallbackInfo<v8::Value>& args) {
469  Write(args);
470  printf("\n");
471  fflush(stdout);
472}
473
474
475void Shell::Write(const v8::FunctionCallbackInfo<v8::Value>& args) {
476  for (int i = 0; i < args.Length(); i++) {
477    HandleScope handle_scope(args.GetIsolate());
478    if (i != 0) {
479      printf(" ");
480    }
481
482    // Explicitly catch potential exceptions in toString().
483    v8::TryCatch try_catch;
484    Handle<String> str_obj = args[i]->ToString();
485    if (try_catch.HasCaught()) {
486      try_catch.ReThrow();
487      return;
488    }
489
490    v8::String::Utf8Value str(str_obj);
491    int n = static_cast<int>(fwrite(*str, sizeof(**str), str.length(), stdout));
492    if (n != str.length()) {
493      printf("Error in fwrite\n");
494      Exit(1);
495    }
496  }
497}
498
499
500void Shell::Read(const v8::FunctionCallbackInfo<v8::Value>& args) {
501  String::Utf8Value file(args[0]);
502  if (*file == NULL) {
503    Throw(args.GetIsolate(), "Error loading file");
504    return;
505  }
506  Handle<String> source = ReadFile(args.GetIsolate(), *file);
507  if (source.IsEmpty()) {
508    Throw(args.GetIsolate(), "Error loading file");
509    return;
510  }
511  args.GetReturnValue().Set(source);
512}
513
514
515Handle<String> Shell::ReadFromStdin(Isolate* isolate) {
516  static const int kBufferSize = 256;
517  char buffer[kBufferSize];
518  Handle<String> accumulator = String::NewFromUtf8(isolate, "");
519  int length;
520  while (true) {
521    // Continue reading if the line ends with an escape '\\' or the line has
522    // not been fully read into the buffer yet (does not end with '\n').
523    // If fgets gets an error, just give up.
524    char* input = NULL;
525    input = fgets(buffer, kBufferSize, stdin);
526    if (input == NULL) return Handle<String>();
527    length = static_cast<int>(strlen(buffer));
528    if (length == 0) {
529      return accumulator;
530    } else if (buffer[length-1] != '\n') {
531      accumulator = String::Concat(
532          accumulator,
533          String::NewFromUtf8(isolate, buffer, String::kNormalString, length));
534    } else if (length > 1 && buffer[length-2] == '\\') {
535      buffer[length-2] = '\n';
536      accumulator = String::Concat(
537          accumulator, String::NewFromUtf8(isolate, buffer,
538                                           String::kNormalString, length - 1));
539    } else {
540      return String::Concat(
541          accumulator, String::NewFromUtf8(isolate, buffer,
542                                           String::kNormalString, length - 1));
543    }
544  }
545}
546
547
548void Shell::Load(const v8::FunctionCallbackInfo<v8::Value>& args) {
549  for (int i = 0; i < args.Length(); i++) {
550    HandleScope handle_scope(args.GetIsolate());
551    String::Utf8Value file(args[i]);
552    if (*file == NULL) {
553      Throw(args.GetIsolate(), "Error loading file");
554      return;
555    }
556    Handle<String> source = ReadFile(args.GetIsolate(), *file);
557    if (source.IsEmpty()) {
558      Throw(args.GetIsolate(), "Error loading file");
559      return;
560    }
561    if (!ExecuteString(args.GetIsolate(),
562                       source,
563                       String::NewFromUtf8(args.GetIsolate(), *file),
564                       false,
565                       true)) {
566      Throw(args.GetIsolate(), "Error executing file");
567      return;
568    }
569  }
570}
571
572
573void Shell::Quit(const v8::FunctionCallbackInfo<v8::Value>& args) {
574  int exit_code = args[0]->Int32Value();
575  OnExit();
576  exit(exit_code);
577}
578
579
580void Shell::Version(const v8::FunctionCallbackInfo<v8::Value>& args) {
581  args.GetReturnValue().Set(
582      String::NewFromUtf8(args.GetIsolate(), V8::GetVersion()));
583}
584
585
586void Shell::ReportException(Isolate* isolate, v8::TryCatch* try_catch) {
587  HandleScope handle_scope(isolate);
588#ifndef V8_SHARED
589  Handle<Context> utility_context;
590  bool enter_context = !isolate->InContext();
591  if (enter_context) {
592    utility_context = Local<Context>::New(isolate, utility_context_);
593    utility_context->Enter();
594  }
595#endif  // !V8_SHARED
596  v8::String::Utf8Value exception(try_catch->Exception());
597  const char* exception_string = ToCString(exception);
598  Handle<Message> message = try_catch->Message();
599  if (message.IsEmpty()) {
600    // V8 didn't provide any extra information about this error; just
601    // print the exception.
602    printf("%s\n", exception_string);
603  } else {
604    // Print (filename):(line number): (message).
605    v8::String::Utf8Value filename(message->GetScriptOrigin().ResourceName());
606    const char* filename_string = ToCString(filename);
607    int linenum = message->GetLineNumber();
608    printf("%s:%i: %s\n", filename_string, linenum, exception_string);
609    // Print line of source code.
610    v8::String::Utf8Value sourceline(message->GetSourceLine());
611    const char* sourceline_string = ToCString(sourceline);
612    printf("%s\n", sourceline_string);
613    // Print wavy underline (GetUnderline is deprecated).
614    int start = message->GetStartColumn();
615    for (int i = 0; i < start; i++) {
616      printf(" ");
617    }
618    int end = message->GetEndColumn();
619    for (int i = start; i < end; i++) {
620      printf("^");
621    }
622    printf("\n");
623    v8::String::Utf8Value stack_trace(try_catch->StackTrace());
624    if (stack_trace.length() > 0) {
625      const char* stack_trace_string = ToCString(stack_trace);
626      printf("%s\n", stack_trace_string);
627    }
628  }
629  printf("\n");
630#ifndef V8_SHARED
631  if (enter_context) utility_context->Exit();
632#endif  // !V8_SHARED
633}
634
635
636#ifndef V8_SHARED
637Handle<Array> Shell::GetCompletions(Isolate* isolate,
638                                    Handle<String> text,
639                                    Handle<String> full) {
640  EscapableHandleScope handle_scope(isolate);
641  v8::Local<v8::Context> utility_context =
642      v8::Local<v8::Context>::New(isolate, utility_context_);
643  v8::Context::Scope context_scope(utility_context);
644  Handle<Object> global = utility_context->Global();
645  Local<Value> fun =
646      global->Get(String::NewFromUtf8(isolate, "GetCompletions"));
647  static const int kArgc = 3;
648  v8::Local<v8::Context> evaluation_context =
649      v8::Local<v8::Context>::New(isolate, evaluation_context_);
650  Handle<Value> argv[kArgc] = { evaluation_context->Global(), text, full };
651  Local<Value> val = Local<Function>::Cast(fun)->Call(global, kArgc, argv);
652  return handle_scope.Escape(Local<Array>::Cast(val));
653}
654
655
656Local<Object> Shell::DebugMessageDetails(Isolate* isolate,
657                                         Handle<String> message) {
658  EscapableHandleScope handle_scope(isolate);
659  v8::Local<v8::Context> context =
660      v8::Local<v8::Context>::New(isolate, utility_context_);
661  v8::Context::Scope context_scope(context);
662  Handle<Object> global = context->Global();
663  Handle<Value> fun =
664      global->Get(String::NewFromUtf8(isolate, "DebugMessageDetails"));
665  static const int kArgc = 1;
666  Handle<Value> argv[kArgc] = { message };
667  Handle<Value> val = Handle<Function>::Cast(fun)->Call(global, kArgc, argv);
668  return handle_scope.Escape(Local<Object>(Handle<Object>::Cast(val)));
669}
670
671
672Local<Value> Shell::DebugCommandToJSONRequest(Isolate* isolate,
673                                              Handle<String> command) {
674  EscapableHandleScope handle_scope(isolate);
675  v8::Local<v8::Context> context =
676      v8::Local<v8::Context>::New(isolate, utility_context_);
677  v8::Context::Scope context_scope(context);
678  Handle<Object> global = context->Global();
679  Handle<Value> fun =
680      global->Get(String::NewFromUtf8(isolate, "DebugCommandToJSONRequest"));
681  static const int kArgc = 1;
682  Handle<Value> argv[kArgc] = { command };
683  Handle<Value> val = Handle<Function>::Cast(fun)->Call(global, kArgc, argv);
684  return handle_scope.Escape(Local<Value>(val));
685}
686
687
688int32_t* Counter::Bind(const char* name, bool is_histogram) {
689  int i;
690  for (i = 0; i < kMaxNameSize - 1 && name[i]; i++)
691    name_[i] = static_cast<char>(name[i]);
692  name_[i] = '\0';
693  is_histogram_ = is_histogram;
694  return ptr();
695}
696
697
698void Counter::AddSample(int32_t sample) {
699  count_++;
700  sample_total_ += sample;
701}
702
703
704CounterCollection::CounterCollection() {
705  magic_number_ = 0xDEADFACE;
706  max_counters_ = kMaxCounters;
707  max_name_size_ = Counter::kMaxNameSize;
708  counters_in_use_ = 0;
709}
710
711
712Counter* CounterCollection::GetNextCounter() {
713  if (counters_in_use_ == kMaxCounters) return NULL;
714  return &counters_[counters_in_use_++];
715}
716
717
718void Shell::MapCounters(v8::Isolate* isolate, const char* name) {
719  counters_file_ = base::OS::MemoryMappedFile::create(
720      name, sizeof(CounterCollection), &local_counters_);
721  void* memory = (counters_file_ == NULL) ?
722      NULL : counters_file_->memory();
723  if (memory == NULL) {
724    printf("Could not map counters file %s\n", name);
725    Exit(1);
726  }
727  counters_ = static_cast<CounterCollection*>(memory);
728  isolate->SetCounterFunction(LookupCounter);
729  isolate->SetCreateHistogramFunction(CreateHistogram);
730  isolate->SetAddHistogramSampleFunction(AddHistogramSample);
731}
732
733
734int CounterMap::Hash(const char* name) {
735  int h = 0;
736  int c;
737  while ((c = *name++) != 0) {
738    h += h << 5;
739    h += c;
740  }
741  return h;
742}
743
744
745Counter* Shell::GetCounter(const char* name, bool is_histogram) {
746  Counter* counter = counter_map_->Lookup(name);
747
748  if (counter == NULL) {
749    counter = counters_->GetNextCounter();
750    if (counter != NULL) {
751      counter_map_->Set(name, counter);
752      counter->Bind(name, is_histogram);
753    }
754  } else {
755    DCHECK(counter->is_histogram() == is_histogram);
756  }
757  return counter;
758}
759
760
761int* Shell::LookupCounter(const char* name) {
762  Counter* counter = GetCounter(name, false);
763
764  if (counter != NULL) {
765    return counter->ptr();
766  } else {
767    return NULL;
768  }
769}
770
771
772void* Shell::CreateHistogram(const char* name,
773                             int min,
774                             int max,
775                             size_t buckets) {
776  return GetCounter(name, true);
777}
778
779
780void Shell::AddHistogramSample(void* histogram, int sample) {
781  Counter* counter = reinterpret_cast<Counter*>(histogram);
782  counter->AddSample(sample);
783}
784
785
786void Shell::InstallUtilityScript(Isolate* isolate) {
787  HandleScope scope(isolate);
788  // If we use the utility context, we have to set the security tokens so that
789  // utility, evaluation and debug context can all access each other.
790  v8::Local<v8::Context> utility_context =
791      v8::Local<v8::Context>::New(isolate, utility_context_);
792  v8::Local<v8::Context> evaluation_context =
793      v8::Local<v8::Context>::New(isolate, evaluation_context_);
794  utility_context->SetSecurityToken(Undefined(isolate));
795  evaluation_context->SetSecurityToken(Undefined(isolate));
796  v8::Context::Scope context_scope(utility_context);
797
798  if (i::FLAG_debugger) printf("JavaScript debugger enabled\n");
799  // Install the debugger object in the utility scope
800  i::Debug* debug = reinterpret_cast<i::Isolate*>(isolate)->debug();
801  debug->Load();
802  i::Handle<i::Context> debug_context = debug->debug_context();
803  i::Handle<i::JSObject> js_debug
804      = i::Handle<i::JSObject>(debug_context->global_object());
805  utility_context->Global()->Set(String::NewFromUtf8(isolate, "$debug"),
806                                 Utils::ToLocal(js_debug));
807  debug_context->set_security_token(
808      reinterpret_cast<i::Isolate*>(isolate)->heap()->undefined_value());
809
810  // Run the d8 shell utility script in the utility context
811  int source_index = i::NativesCollection<i::D8>::GetIndex("d8");
812  i::Vector<const char> shell_source =
813      i::NativesCollection<i::D8>::GetRawScriptSource(source_index);
814  i::Vector<const char> shell_source_name =
815      i::NativesCollection<i::D8>::GetScriptName(source_index);
816  Handle<String> source =
817      String::NewFromUtf8(isolate, shell_source.start(), String::kNormalString,
818                          shell_source.length());
819  Handle<String> name =
820      String::NewFromUtf8(isolate, shell_source_name.start(),
821                          String::kNormalString, shell_source_name.length());
822  ScriptOrigin origin(name);
823  Handle<Script> script = Script::Compile(source, &origin);
824  script->Run();
825  // Mark the d8 shell script as native to avoid it showing up as normal source
826  // in the debugger.
827  i::Handle<i::Object> compiled_script = Utils::OpenHandle(*script);
828  i::Handle<i::Script> script_object = compiled_script->IsJSFunction()
829      ? i::Handle<i::Script>(i::Script::cast(
830          i::JSFunction::cast(*compiled_script)->shared()->script()))
831      : i::Handle<i::Script>(i::Script::cast(
832          i::SharedFunctionInfo::cast(*compiled_script)->script()));
833  script_object->set_type(i::Smi::FromInt(i::Script::TYPE_NATIVE));
834
835  // Start the in-process debugger if requested.
836  if (i::FLAG_debugger) v8::Debug::SetDebugEventListener(HandleDebugEvent);
837}
838#endif  // !V8_SHARED
839
840
841#ifdef COMPRESS_STARTUP_DATA_BZ2
842class BZip2Decompressor : public v8::StartupDataDecompressor {
843 public:
844  virtual ~BZip2Decompressor() { }
845
846 protected:
847  virtual int DecompressData(char* raw_data,
848                             int* raw_data_size,
849                             const char* compressed_data,
850                             int compressed_data_size) {
851    DCHECK_EQ(v8::StartupData::kBZip2,
852              v8::V8::GetCompressedStartupDataAlgorithm());
853    unsigned int decompressed_size = *raw_data_size;
854    int result =
855        BZ2_bzBuffToBuffDecompress(raw_data,
856                                   &decompressed_size,
857                                   const_cast<char*>(compressed_data),
858                                   compressed_data_size,
859                                   0, 1);
860    if (result == BZ_OK) {
861      *raw_data_size = decompressed_size;
862    }
863    return result;
864  }
865};
866#endif
867
868
869Handle<ObjectTemplate> Shell::CreateGlobalTemplate(Isolate* isolate) {
870  Handle<ObjectTemplate> global_template = ObjectTemplate::New(isolate);
871  global_template->Set(String::NewFromUtf8(isolate, "print"),
872                       FunctionTemplate::New(isolate, Print));
873  global_template->Set(String::NewFromUtf8(isolate, "write"),
874                       FunctionTemplate::New(isolate, Write));
875  global_template->Set(String::NewFromUtf8(isolate, "read"),
876                       FunctionTemplate::New(isolate, Read));
877  global_template->Set(String::NewFromUtf8(isolate, "readbuffer"),
878                       FunctionTemplate::New(isolate, ReadBuffer));
879  global_template->Set(String::NewFromUtf8(isolate, "readline"),
880                       FunctionTemplate::New(isolate, ReadLine));
881  global_template->Set(String::NewFromUtf8(isolate, "load"),
882                       FunctionTemplate::New(isolate, Load));
883  global_template->Set(String::NewFromUtf8(isolate, "quit"),
884                       FunctionTemplate::New(isolate, Quit));
885  global_template->Set(String::NewFromUtf8(isolate, "version"),
886                       FunctionTemplate::New(isolate, Version));
887
888  // Bind the Realm object.
889  Handle<ObjectTemplate> realm_template = ObjectTemplate::New(isolate);
890  realm_template->Set(String::NewFromUtf8(isolate, "current"),
891                      FunctionTemplate::New(isolate, RealmCurrent));
892  realm_template->Set(String::NewFromUtf8(isolate, "owner"),
893                      FunctionTemplate::New(isolate, RealmOwner));
894  realm_template->Set(String::NewFromUtf8(isolate, "global"),
895                      FunctionTemplate::New(isolate, RealmGlobal));
896  realm_template->Set(String::NewFromUtf8(isolate, "create"),
897                      FunctionTemplate::New(isolate, RealmCreate));
898  realm_template->Set(String::NewFromUtf8(isolate, "dispose"),
899                      FunctionTemplate::New(isolate, RealmDispose));
900  realm_template->Set(String::NewFromUtf8(isolate, "switch"),
901                      FunctionTemplate::New(isolate, RealmSwitch));
902  realm_template->Set(String::NewFromUtf8(isolate, "eval"),
903                      FunctionTemplate::New(isolate, RealmEval));
904  realm_template->SetAccessor(String::NewFromUtf8(isolate, "shared"),
905                              RealmSharedGet, RealmSharedSet);
906  global_template->Set(String::NewFromUtf8(isolate, "Realm"), realm_template);
907
908#ifndef V8_SHARED
909  Handle<ObjectTemplate> performance_template = ObjectTemplate::New(isolate);
910  performance_template->Set(String::NewFromUtf8(isolate, "now"),
911                            FunctionTemplate::New(isolate, PerformanceNow));
912  global_template->Set(String::NewFromUtf8(isolate, "performance"),
913                       performance_template);
914#endif  // !V8_SHARED
915
916  Handle<ObjectTemplate> os_templ = ObjectTemplate::New(isolate);
917  AddOSMethods(isolate, os_templ);
918  global_template->Set(String::NewFromUtf8(isolate, "os"), os_templ);
919
920  return global_template;
921}
922
923
924void Shell::Initialize(Isolate* isolate) {
925#ifdef COMPRESS_STARTUP_DATA_BZ2
926  BZip2Decompressor startup_data_decompressor;
927  int bz2_result = startup_data_decompressor.Decompress();
928  if (bz2_result != BZ_OK) {
929    fprintf(stderr, "bzip error code: %d\n", bz2_result);
930    Exit(1);
931  }
932#endif
933
934#ifndef V8_SHARED
935  Shell::counter_map_ = new CounterMap();
936  // Set up counters
937  if (i::StrLength(i::FLAG_map_counters) != 0)
938    MapCounters(isolate, i::FLAG_map_counters);
939  if (i::FLAG_dump_counters || i::FLAG_track_gc_object_stats) {
940    isolate->SetCounterFunction(LookupCounter);
941    isolate->SetCreateHistogramFunction(CreateHistogram);
942    isolate->SetAddHistogramSampleFunction(AddHistogramSample);
943  }
944#endif  // !V8_SHARED
945}
946
947
948void Shell::InitializeDebugger(Isolate* isolate) {
949  if (options.test_shell) return;
950#ifndef V8_SHARED
951  HandleScope scope(isolate);
952  Handle<ObjectTemplate> global_template = CreateGlobalTemplate(isolate);
953  utility_context_.Reset(isolate,
954                         Context::New(isolate, NULL, global_template));
955#endif  // !V8_SHARED
956}
957
958
959Local<Context> Shell::CreateEvaluationContext(Isolate* isolate) {
960#ifndef V8_SHARED
961  // This needs to be a critical section since this is not thread-safe
962  base::LockGuard<base::Mutex> lock_guard(&context_mutex_);
963#endif  // !V8_SHARED
964  // Initialize the global objects
965  Handle<ObjectTemplate> global_template = CreateGlobalTemplate(isolate);
966  EscapableHandleScope handle_scope(isolate);
967  Local<Context> context = Context::New(isolate, NULL, global_template);
968  DCHECK(!context.IsEmpty());
969  Context::Scope scope(context);
970
971#ifndef V8_SHARED
972  i::Factory* factory = reinterpret_cast<i::Isolate*>(isolate)->factory();
973  i::JSArguments js_args = i::FLAG_js_arguments;
974  i::Handle<i::FixedArray> arguments_array =
975      factory->NewFixedArray(js_args.argc);
976  for (int j = 0; j < js_args.argc; j++) {
977    i::Handle<i::String> arg =
978        factory->NewStringFromUtf8(i::CStrVector(js_args[j])).ToHandleChecked();
979    arguments_array->set(j, *arg);
980  }
981  i::Handle<i::JSArray> arguments_jsarray =
982      factory->NewJSArrayWithElements(arguments_array);
983  context->Global()->Set(String::NewFromUtf8(isolate, "arguments"),
984                         Utils::ToLocal(arguments_jsarray));
985#endif  // !V8_SHARED
986  return handle_scope.Escape(context);
987}
988
989
990void Shell::Exit(int exit_code) {
991  // Use _exit instead of exit to avoid races between isolate
992  // threads and static destructors.
993  fflush(stdout);
994  fflush(stderr);
995  _exit(exit_code);
996}
997
998
999#ifndef V8_SHARED
1000struct CounterAndKey {
1001  Counter* counter;
1002  const char* key;
1003};
1004
1005
1006inline bool operator<(const CounterAndKey& lhs, const CounterAndKey& rhs) {
1007  return strcmp(lhs.key, rhs.key) < 0;
1008}
1009#endif  // !V8_SHARED
1010
1011
1012void Shell::OnExit() {
1013  LineEditor* line_editor = LineEditor::Get();
1014  if (line_editor) line_editor->Close();
1015#ifndef V8_SHARED
1016  if (i::FLAG_dump_counters) {
1017    int number_of_counters = 0;
1018    for (CounterMap::Iterator i(counter_map_); i.More(); i.Next()) {
1019      number_of_counters++;
1020    }
1021    CounterAndKey* counters = new CounterAndKey[number_of_counters];
1022    int j = 0;
1023    for (CounterMap::Iterator i(counter_map_); i.More(); i.Next(), j++) {
1024      counters[j].counter = i.CurrentValue();
1025      counters[j].key = i.CurrentKey();
1026    }
1027    std::sort(counters, counters + number_of_counters);
1028    printf("+----------------------------------------------------------------+"
1029           "-------------+\n");
1030    printf("| Name                                                           |"
1031           " Value       |\n");
1032    printf("+----------------------------------------------------------------+"
1033           "-------------+\n");
1034    for (j = 0; j < number_of_counters; j++) {
1035      Counter* counter = counters[j].counter;
1036      const char* key = counters[j].key;
1037      if (counter->is_histogram()) {
1038        printf("| c:%-60s | %11i |\n", key, counter->count());
1039        printf("| t:%-60s | %11i |\n", key, counter->sample_total());
1040      } else {
1041        printf("| %-62s | %11i |\n", key, counter->count());
1042      }
1043    }
1044    printf("+----------------------------------------------------------------+"
1045           "-------------+\n");
1046    delete [] counters;
1047  }
1048  delete counters_file_;
1049  delete counter_map_;
1050#endif  // !V8_SHARED
1051}
1052
1053
1054
1055static FILE* FOpen(const char* path, const char* mode) {
1056#if defined(_MSC_VER) && (defined(_WIN32) || defined(_WIN64))
1057  FILE* result;
1058  if (fopen_s(&result, path, mode) == 0) {
1059    return result;
1060  } else {
1061    return NULL;
1062  }
1063#else
1064  FILE* file = fopen(path, mode);
1065  if (file == NULL) return NULL;
1066  struct stat file_stat;
1067  if (fstat(fileno(file), &file_stat) != 0) return NULL;
1068  bool is_regular_file = ((file_stat.st_mode & S_IFREG) != 0);
1069  if (is_regular_file) return file;
1070  fclose(file);
1071  return NULL;
1072#endif
1073}
1074
1075
1076static char* ReadChars(Isolate* isolate, const char* name, int* size_out) {
1077  FILE* file = FOpen(name, "rb");
1078  if (file == NULL) return NULL;
1079
1080  fseek(file, 0, SEEK_END);
1081  int size = ftell(file);
1082  rewind(file);
1083
1084  char* chars = new char[size + 1];
1085  chars[size] = '\0';
1086  for (int i = 0; i < size;) {
1087    int read = static_cast<int>(fread(&chars[i], 1, size - i, file));
1088    i += read;
1089  }
1090  fclose(file);
1091  *size_out = size;
1092  return chars;
1093}
1094
1095
1096struct DataAndPersistent {
1097  uint8_t* data;
1098  Persistent<ArrayBuffer> handle;
1099};
1100
1101
1102static void ReadBufferWeakCallback(
1103    const v8::WeakCallbackData<ArrayBuffer, DataAndPersistent>& data) {
1104  size_t byte_length = data.GetValue()->ByteLength();
1105  data.GetIsolate()->AdjustAmountOfExternalAllocatedMemory(
1106      -static_cast<intptr_t>(byte_length));
1107
1108  delete[] data.GetParameter()->data;
1109  data.GetParameter()->handle.Reset();
1110  delete data.GetParameter();
1111}
1112
1113
1114void Shell::ReadBuffer(const v8::FunctionCallbackInfo<v8::Value>& args) {
1115  DCHECK(sizeof(char) == sizeof(uint8_t));  // NOLINT
1116  String::Utf8Value filename(args[0]);
1117  int length;
1118  if (*filename == NULL) {
1119    Throw(args.GetIsolate(), "Error loading file");
1120    return;
1121  }
1122
1123  Isolate* isolate = args.GetIsolate();
1124  DataAndPersistent* data = new DataAndPersistent;
1125  data->data = reinterpret_cast<uint8_t*>(
1126      ReadChars(args.GetIsolate(), *filename, &length));
1127  if (data->data == NULL) {
1128    delete data;
1129    Throw(args.GetIsolate(), "Error reading file");
1130    return;
1131  }
1132  Handle<v8::ArrayBuffer> buffer =
1133      ArrayBuffer::New(isolate, data->data, length);
1134  data->handle.Reset(isolate, buffer);
1135  data->handle.SetWeak(data, ReadBufferWeakCallback);
1136  data->handle.MarkIndependent();
1137  isolate->AdjustAmountOfExternalAllocatedMemory(length);
1138
1139  args.GetReturnValue().Set(buffer);
1140}
1141
1142
1143// Reads a file into a v8 string.
1144Handle<String> Shell::ReadFile(Isolate* isolate, const char* name) {
1145  int size = 0;
1146  char* chars = ReadChars(isolate, name, &size);
1147  if (chars == NULL) return Handle<String>();
1148  Handle<String> result =
1149      String::NewFromUtf8(isolate, chars, String::kNormalString, size);
1150  delete[] chars;
1151  return result;
1152}
1153
1154
1155void Shell::RunShell(Isolate* isolate) {
1156  HandleScope outer_scope(isolate);
1157  v8::Local<v8::Context> context =
1158      v8::Local<v8::Context>::New(isolate, evaluation_context_);
1159  v8::Context::Scope context_scope(context);
1160  PerIsolateData::RealmScope realm_scope(PerIsolateData::Get(isolate));
1161  Handle<String> name = String::NewFromUtf8(isolate, "(d8)");
1162  LineEditor* console = LineEditor::Get();
1163  printf("V8 version %s [console: %s]\n", V8::GetVersion(), console->name());
1164  console->Open(isolate);
1165  while (true) {
1166    HandleScope inner_scope(isolate);
1167    Handle<String> input = console->Prompt(Shell::kPrompt);
1168    if (input.IsEmpty()) break;
1169    ExecuteString(isolate, input, name, true, true);
1170  }
1171  printf("\n");
1172}
1173
1174
1175SourceGroup::~SourceGroup() {
1176#ifndef V8_SHARED
1177  delete thread_;
1178  thread_ = NULL;
1179#endif  // !V8_SHARED
1180}
1181
1182
1183void SourceGroup::Execute(Isolate* isolate) {
1184  bool exception_was_thrown = false;
1185  for (int i = begin_offset_; i < end_offset_; ++i) {
1186    const char* arg = argv_[i];
1187    if (strcmp(arg, "-e") == 0 && i + 1 < end_offset_) {
1188      // Execute argument given to -e option directly.
1189      HandleScope handle_scope(isolate);
1190      Handle<String> file_name = String::NewFromUtf8(isolate, "unnamed");
1191      Handle<String> source = String::NewFromUtf8(isolate, argv_[i + 1]);
1192      if (!Shell::ExecuteString(isolate, source, file_name, false, true)) {
1193        exception_was_thrown = true;
1194        break;
1195      }
1196      ++i;
1197    } else if (arg[0] == '-') {
1198      // Ignore other options. They have been parsed already.
1199    } else {
1200      // Use all other arguments as names of files to load and run.
1201      HandleScope handle_scope(isolate);
1202      Handle<String> file_name = String::NewFromUtf8(isolate, arg);
1203      Handle<String> source = ReadFile(isolate, arg);
1204      if (source.IsEmpty()) {
1205        printf("Error reading '%s'\n", arg);
1206        Shell::Exit(1);
1207      }
1208      if (!Shell::ExecuteString(isolate, source, file_name, false, true)) {
1209        exception_was_thrown = true;
1210        break;
1211      }
1212    }
1213  }
1214  if (exception_was_thrown != Shell::options.expected_to_throw) {
1215    Shell::Exit(1);
1216  }
1217}
1218
1219
1220Handle<String> SourceGroup::ReadFile(Isolate* isolate, const char* name) {
1221  int size;
1222  char* chars = ReadChars(isolate, name, &size);
1223  if (chars == NULL) return Handle<String>();
1224  Handle<String> result =
1225      String::NewFromUtf8(isolate, chars, String::kNormalString, size);
1226  delete[] chars;
1227  return result;
1228}
1229
1230
1231#ifndef V8_SHARED
1232base::Thread::Options SourceGroup::GetThreadOptions() {
1233  // On some systems (OSX 10.6) the stack size default is 0.5Mb or less
1234  // which is not enough to parse the big literal expressions used in tests.
1235  // The stack size should be at least StackGuard::kLimitSize + some
1236  // OS-specific padding for thread startup code.  2Mbytes seems to be enough.
1237  return base::Thread::Options("IsolateThread", 2 * MB);
1238}
1239
1240
1241void SourceGroup::ExecuteInThread() {
1242  Isolate* isolate = Isolate::New();
1243  do {
1244    next_semaphore_.Wait();
1245    {
1246      Isolate::Scope iscope(isolate);
1247      {
1248        HandleScope scope(isolate);
1249        PerIsolateData data(isolate);
1250        Local<Context> context = Shell::CreateEvaluationContext(isolate);
1251        {
1252          Context::Scope cscope(context);
1253          PerIsolateData::RealmScope realm_scope(PerIsolateData::Get(isolate));
1254          Execute(isolate);
1255        }
1256      }
1257      if (Shell::options.send_idle_notification) {
1258        const int kLongIdlePauseInMs = 1000;
1259        isolate->ContextDisposedNotification();
1260        isolate->IdleNotification(kLongIdlePauseInMs);
1261      }
1262      if (Shell::options.invoke_weak_callbacks) {
1263        // By sending a low memory notifications, we will try hard to collect
1264        // all garbage and will therefore also invoke all weak callbacks of
1265        // actually unreachable persistent handles.
1266        isolate->LowMemoryNotification();
1267      }
1268    }
1269    done_semaphore_.Signal();
1270  } while (!Shell::options.last_run);
1271
1272  isolate->Dispose();
1273}
1274
1275
1276void SourceGroup::StartExecuteInThread() {
1277  if (thread_ == NULL) {
1278    thread_ = new IsolateThread(this);
1279    thread_->Start();
1280  }
1281  next_semaphore_.Signal();
1282}
1283
1284
1285void SourceGroup::WaitForThread() {
1286  if (thread_ == NULL) return;
1287  if (Shell::options.last_run) {
1288    thread_->Join();
1289  } else {
1290    done_semaphore_.Wait();
1291  }
1292}
1293#endif  // !V8_SHARED
1294
1295
1296void SetFlagsFromString(const char* flags) {
1297  v8::V8::SetFlagsFromString(flags, static_cast<int>(strlen(flags)));
1298}
1299
1300
1301bool Shell::SetOptions(int argc, char* argv[]) {
1302  bool logfile_per_isolate = false;
1303  for (int i = 0; i < argc; i++) {
1304    if (strcmp(argv[i], "--stress-opt") == 0) {
1305      options.stress_opt = true;
1306      argv[i] = NULL;
1307    } else if (strcmp(argv[i], "--nostress-opt") == 0) {
1308      options.stress_opt = false;
1309      argv[i] = NULL;
1310    } else if (strcmp(argv[i], "--stress-deopt") == 0) {
1311      options.stress_deopt = true;
1312      argv[i] = NULL;
1313    } else if (strcmp(argv[i], "--mock-arraybuffer-allocator") == 0) {
1314      options.mock_arraybuffer_allocator = true;
1315      argv[i] = NULL;
1316    } else if (strcmp(argv[i], "--noalways-opt") == 0) {
1317      // No support for stressing if we can't use --always-opt.
1318      options.stress_opt = false;
1319      options.stress_deopt = false;
1320    } else if (strcmp(argv[i], "--logfile-per-isolate") == 0) {
1321      logfile_per_isolate = true;
1322      argv[i] = NULL;
1323    } else if (strcmp(argv[i], "--shell") == 0) {
1324      options.interactive_shell = true;
1325      argv[i] = NULL;
1326    } else if (strcmp(argv[i], "--test") == 0) {
1327      options.test_shell = true;
1328      argv[i] = NULL;
1329    } else if (strcmp(argv[i], "--send-idle-notification") == 0) {
1330      options.send_idle_notification = true;
1331      argv[i] = NULL;
1332    } else if (strcmp(argv[i], "--invoke-weak-callbacks") == 0) {
1333      options.invoke_weak_callbacks = true;
1334      // TODO(jochen) See issue 3351
1335      options.send_idle_notification = true;
1336      argv[i] = NULL;
1337    } else if (strcmp(argv[i], "-f") == 0) {
1338      // Ignore any -f flags for compatibility with other stand-alone
1339      // JavaScript engines.
1340      continue;
1341    } else if (strcmp(argv[i], "--isolate") == 0) {
1342#ifdef V8_SHARED
1343      printf("D8 with shared library does not support multi-threading\n");
1344      return false;
1345#endif  // V8_SHARED
1346      options.num_isolates++;
1347    } else if (strcmp(argv[i], "--dump-heap-constants") == 0) {
1348#ifdef V8_SHARED
1349      printf("D8 with shared library does not support constant dumping\n");
1350      return false;
1351#else
1352      options.dump_heap_constants = true;
1353      argv[i] = NULL;
1354#endif  // V8_SHARED
1355    } else if (strcmp(argv[i], "--throws") == 0) {
1356      options.expected_to_throw = true;
1357      argv[i] = NULL;
1358    } else if (strncmp(argv[i], "--icu-data-file=", 16) == 0) {
1359      options.icu_data_file = argv[i] + 16;
1360      argv[i] = NULL;
1361#ifdef V8_SHARED
1362    } else if (strcmp(argv[i], "--dump-counters") == 0) {
1363      printf("D8 with shared library does not include counters\n");
1364      return false;
1365    } else if (strcmp(argv[i], "--debugger") == 0) {
1366      printf("Javascript debugger not included\n");
1367      return false;
1368#endif  // V8_SHARED
1369#ifdef V8_USE_EXTERNAL_STARTUP_DATA
1370    } else if (strncmp(argv[i], "--natives_blob=", 15) == 0) {
1371      options.natives_blob = argv[i] + 15;
1372      argv[i] = NULL;
1373    } else if (strncmp(argv[i], "--snapshot_blob=", 16) == 0) {
1374      options.snapshot_blob = argv[i] + 16;
1375      argv[i] = NULL;
1376#endif  // V8_USE_EXTERNAL_STARTUP_DATA
1377    } else if (strcmp(argv[i], "--cache") == 0 ||
1378               strncmp(argv[i], "--cache=", 8) == 0) {
1379      const char* value = argv[i] + 7;
1380      if (!*value || strncmp(value, "=code", 6) == 0) {
1381        options.compile_options = v8::ScriptCompiler::kProduceCodeCache;
1382      } else if (strncmp(value, "=parse", 7) == 0) {
1383        options.compile_options = v8::ScriptCompiler::kProduceParserCache;
1384      } else if (strncmp(value, "=none", 6) == 0) {
1385        options.compile_options = v8::ScriptCompiler::kNoCompileOptions;
1386      } else {
1387        printf("Unknown option to --cache.\n");
1388        return false;
1389      }
1390      argv[i] = NULL;
1391    }
1392  }
1393
1394  v8::V8::SetFlagsFromCommandLine(&argc, argv, true);
1395
1396  // Set up isolated source groups.
1397  options.isolate_sources = new SourceGroup[options.num_isolates];
1398  SourceGroup* current = options.isolate_sources;
1399  current->Begin(argv, 1);
1400  for (int i = 1; i < argc; i++) {
1401    const char* str = argv[i];
1402    if (strcmp(str, "--isolate") == 0) {
1403      current->End(i);
1404      current++;
1405      current->Begin(argv, i + 1);
1406    } else if (strncmp(argv[i], "--", 2) == 0) {
1407      printf("Warning: unknown flag %s.\nTry --help for options\n", argv[i]);
1408    }
1409  }
1410  current->End(argc);
1411
1412  if (!logfile_per_isolate && options.num_isolates) {
1413    SetFlagsFromString("--nologfile_per_isolate");
1414  }
1415
1416  return true;
1417}
1418
1419
1420int Shell::RunMain(Isolate* isolate, int argc, char* argv[]) {
1421#ifndef V8_SHARED
1422  for (int i = 1; i < options.num_isolates; ++i) {
1423    options.isolate_sources[i].StartExecuteInThread();
1424  }
1425#endif  // !V8_SHARED
1426  {
1427    HandleScope scope(isolate);
1428    Local<Context> context = CreateEvaluationContext(isolate);
1429    if (options.last_run && options.use_interactive_shell()) {
1430      // Keep using the same context in the interactive shell.
1431      evaluation_context_.Reset(isolate, context);
1432#ifndef V8_SHARED
1433      // If the interactive debugger is enabled make sure to activate
1434      // it before running the files passed on the command line.
1435      if (i::FLAG_debugger) {
1436        InstallUtilityScript(isolate);
1437      }
1438#endif  // !V8_SHARED
1439    }
1440    {
1441      Context::Scope cscope(context);
1442      PerIsolateData::RealmScope realm_scope(PerIsolateData::Get(isolate));
1443      options.isolate_sources[0].Execute(isolate);
1444    }
1445  }
1446  if (options.send_idle_notification) {
1447    const int kLongIdlePauseInMs = 1000;
1448    isolate->ContextDisposedNotification();
1449    isolate->IdleNotification(kLongIdlePauseInMs);
1450  }
1451  if (options.invoke_weak_callbacks) {
1452    // By sending a low memory notifications, we will try hard to collect all
1453    // garbage and will therefore also invoke all weak callbacks of actually
1454    // unreachable persistent handles.
1455    isolate->LowMemoryNotification();
1456  }
1457
1458#ifndef V8_SHARED
1459  for (int i = 1; i < options.num_isolates; ++i) {
1460    options.isolate_sources[i].WaitForThread();
1461  }
1462#endif  // !V8_SHARED
1463  return 0;
1464}
1465
1466
1467#ifndef V8_SHARED
1468static void DumpHeapConstants(i::Isolate* isolate) {
1469  i::Heap* heap = isolate->heap();
1470
1471  // Dump the INSTANCE_TYPES table to the console.
1472  printf("# List of known V8 instance types.\n");
1473#define DUMP_TYPE(T) printf("  %d: \"%s\",\n", i::T, #T);
1474  printf("INSTANCE_TYPES = {\n");
1475  INSTANCE_TYPE_LIST(DUMP_TYPE)
1476  printf("}\n");
1477#undef DUMP_TYPE
1478
1479  // Dump the KNOWN_MAP table to the console.
1480  printf("\n# List of known V8 maps.\n");
1481#define ROOT_LIST_CASE(type, name, camel_name) \
1482  if (n == NULL && o == heap->name()) n = #camel_name;
1483#define STRUCT_LIST_CASE(upper_name, camel_name, name) \
1484  if (n == NULL && o == heap->name##_map()) n = #camel_name "Map";
1485  i::HeapObjectIterator it(heap->map_space());
1486  printf("KNOWN_MAPS = {\n");
1487  for (i::Object* o = it.Next(); o != NULL; o = it.Next()) {
1488    i::Map* m = i::Map::cast(o);
1489    const char* n = NULL;
1490    intptr_t p = reinterpret_cast<intptr_t>(m) & 0xfffff;
1491    int t = m->instance_type();
1492    ROOT_LIST(ROOT_LIST_CASE)
1493    STRUCT_LIST(STRUCT_LIST_CASE)
1494    if (n == NULL) continue;
1495    printf("  0x%05" V8PRIxPTR ": (%d, \"%s\"),\n", p, t, n);
1496  }
1497  printf("}\n");
1498#undef STRUCT_LIST_CASE
1499#undef ROOT_LIST_CASE
1500
1501  // Dump the KNOWN_OBJECTS table to the console.
1502  printf("\n# List of known V8 objects.\n");
1503#define ROOT_LIST_CASE(type, name, camel_name) \
1504  if (n == NULL && o == heap->name()) n = #camel_name;
1505  i::OldSpaces spit(heap);
1506  printf("KNOWN_OBJECTS = {\n");
1507  for (i::PagedSpace* s = spit.next(); s != NULL; s = spit.next()) {
1508    i::HeapObjectIterator it(s);
1509    const char* sname = AllocationSpaceName(s->identity());
1510    for (i::Object* o = it.Next(); o != NULL; o = it.Next()) {
1511      const char* n = NULL;
1512      intptr_t p = reinterpret_cast<intptr_t>(o) & 0xfffff;
1513      ROOT_LIST(ROOT_LIST_CASE)
1514      if (n == NULL) continue;
1515      printf("  (\"%s\", 0x%05" V8PRIxPTR "): \"%s\",\n", sname, p, n);
1516    }
1517  }
1518  printf("}\n");
1519#undef ROOT_LIST_CASE
1520}
1521#endif  // !V8_SHARED
1522
1523
1524class ShellArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
1525 public:
1526  virtual void* Allocate(size_t length) {
1527    void* data = AllocateUninitialized(length);
1528    return data == NULL ? data : memset(data, 0, length);
1529  }
1530  virtual void* AllocateUninitialized(size_t length) { return malloc(length); }
1531  virtual void Free(void* data, size_t) { free(data); }
1532};
1533
1534
1535class MockArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
1536 public:
1537  virtual void* Allocate(size_t) OVERRIDE {
1538    return malloc(0);
1539  }
1540  virtual void* AllocateUninitialized(size_t length) OVERRIDE {
1541    return malloc(0);
1542  }
1543  virtual void Free(void* p, size_t) OVERRIDE {
1544    free(p);
1545  }
1546};
1547
1548
1549#ifdef V8_USE_EXTERNAL_STARTUP_DATA
1550class StartupDataHandler {
1551 public:
1552  StartupDataHandler(const char* natives_blob,
1553                     const char* snapshot_blob) {
1554    Load(natives_blob, &natives_, v8::V8::SetNativesDataBlob);
1555    Load(snapshot_blob, &snapshot_, v8::V8::SetSnapshotDataBlob);
1556  }
1557
1558  ~StartupDataHandler() {
1559    delete[] natives_.data;
1560    delete[] snapshot_.data;
1561  }
1562
1563 private:
1564  void Load(const char* blob_file,
1565            v8::StartupData* startup_data,
1566            void (*setter_fn)(v8::StartupData*)) {
1567    startup_data->data = NULL;
1568    startup_data->compressed_size = 0;
1569    startup_data->raw_size = 0;
1570
1571    if (!blob_file)
1572      return;
1573
1574    FILE* file = fopen(blob_file, "rb");
1575    if (!file)
1576      return;
1577
1578    fseek(file, 0, SEEK_END);
1579    startup_data->raw_size = ftell(file);
1580    rewind(file);
1581
1582    startup_data->data = new char[startup_data->raw_size];
1583    startup_data->compressed_size = fread(
1584        const_cast<char*>(startup_data->data), 1, startup_data->raw_size,
1585        file);
1586    fclose(file);
1587
1588    if (startup_data->raw_size == startup_data->compressed_size)
1589      (*setter_fn)(startup_data);
1590  }
1591
1592  v8::StartupData natives_;
1593  v8::StartupData snapshot_;
1594
1595  // Disallow copy & assign.
1596  StartupDataHandler(const StartupDataHandler& other);
1597  void operator=(const StartupDataHandler& other);
1598};
1599#endif  // V8_USE_EXTERNAL_STARTUP_DATA
1600
1601
1602int Shell::Main(int argc, char* argv[]) {
1603#if (defined(_WIN32) || defined(_WIN64))
1604  UINT new_flags =
1605      SEM_FAILCRITICALERRORS | SEM_NOGPFAULTERRORBOX | SEM_NOOPENFILEERRORBOX;
1606  UINT existing_flags = SetErrorMode(new_flags);
1607  SetErrorMode(existing_flags | new_flags);
1608#if defined(_MSC_VER)
1609  _CrtSetReportMode(_CRT_WARN, _CRTDBG_MODE_DEBUG | _CRTDBG_MODE_FILE);
1610  _CrtSetReportFile(_CRT_WARN, _CRTDBG_FILE_STDERR);
1611  _CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_DEBUG | _CRTDBG_MODE_FILE);
1612  _CrtSetReportFile(_CRT_ASSERT, _CRTDBG_FILE_STDERR);
1613  _CrtSetReportMode(_CRT_ERROR, _CRTDBG_MODE_DEBUG | _CRTDBG_MODE_FILE);
1614  _CrtSetReportFile(_CRT_ERROR, _CRTDBG_FILE_STDERR);
1615  _set_error_mode(_OUT_TO_STDERR);
1616#endif  // defined(_MSC_VER)
1617#endif  // defined(_WIN32) || defined(_WIN64)
1618  if (!SetOptions(argc, argv)) return 1;
1619  v8::V8::InitializeICU(options.icu_data_file);
1620  v8::Platform* platform = v8::platform::CreateDefaultPlatform();
1621  v8::V8::InitializePlatform(platform);
1622  v8::V8::Initialize();
1623#ifdef V8_USE_EXTERNAL_STARTUP_DATA
1624  StartupDataHandler startup_data(options.natives_blob, options.snapshot_blob);
1625#endif
1626  SetFlagsFromString("--trace-hydrogen-file=hydrogen.cfg");
1627  SetFlagsFromString("--redirect-code-traces-to=code.asm");
1628  ShellArrayBufferAllocator array_buffer_allocator;
1629  MockArrayBufferAllocator mock_arraybuffer_allocator;
1630  if (options.mock_arraybuffer_allocator) {
1631    v8::V8::SetArrayBufferAllocator(&mock_arraybuffer_allocator);
1632  } else {
1633    v8::V8::SetArrayBufferAllocator(&array_buffer_allocator);
1634  }
1635  int result = 0;
1636  Isolate::CreateParams create_params;
1637#if !defined(V8_SHARED) && defined(ENABLE_GDB_JIT_INTERFACE)
1638  if (i::FLAG_gdbjit) {
1639    create_params.code_event_handler = i::GDBJITInterface::EventHandler;
1640  }
1641#endif
1642#ifdef ENABLE_VTUNE_JIT_INTERFACE
1643  vTune::InitializeVtuneForV8(create_params);
1644#endif
1645#ifndef V8_SHARED
1646  create_params.constraints.ConfigureDefaults(
1647      base::SysInfo::AmountOfPhysicalMemory(),
1648      base::SysInfo::AmountOfVirtualMemory(),
1649      base::SysInfo::NumberOfProcessors());
1650#endif
1651  Isolate* isolate = Isolate::New(create_params);
1652  DumbLineEditor dumb_line_editor(isolate);
1653  {
1654    Isolate::Scope scope(isolate);
1655    Initialize(isolate);
1656    PerIsolateData data(isolate);
1657    InitializeDebugger(isolate);
1658
1659#ifndef V8_SHARED
1660    if (options.dump_heap_constants) {
1661      DumpHeapConstants(reinterpret_cast<i::Isolate*>(isolate));
1662      return 0;
1663    }
1664#endif
1665
1666    if (options.stress_opt || options.stress_deopt) {
1667      Testing::SetStressRunType(options.stress_opt
1668                                ? Testing::kStressTypeOpt
1669                                : Testing::kStressTypeDeopt);
1670      int stress_runs = Testing::GetStressRuns();
1671      for (int i = 0; i < stress_runs && result == 0; i++) {
1672        printf("============ Stress %d/%d ============\n", i + 1, stress_runs);
1673        Testing::PrepareStressRun(i);
1674        options.last_run = (i == stress_runs - 1);
1675        result = RunMain(isolate, argc, argv);
1676      }
1677      printf("======== Full Deoptimization =======\n");
1678      Testing::DeoptimizeAll();
1679#if !defined(V8_SHARED)
1680    } else if (i::FLAG_stress_runs > 0) {
1681      int stress_runs = i::FLAG_stress_runs;
1682      for (int i = 0; i < stress_runs && result == 0; i++) {
1683        printf("============ Run %d/%d ============\n", i + 1, stress_runs);
1684        options.last_run = (i == stress_runs - 1);
1685        result = RunMain(isolate, argc, argv);
1686      }
1687#endif
1688    } else {
1689      result = RunMain(isolate, argc, argv);
1690    }
1691
1692    // Run interactive shell if explicitly requested or if no script has been
1693    // executed, but never on --test
1694    if (options.use_interactive_shell()) {
1695#ifndef V8_SHARED
1696      if (!i::FLAG_debugger) {
1697        InstallUtilityScript(isolate);
1698      }
1699#endif  // !V8_SHARED
1700      RunShell(isolate);
1701    }
1702  }
1703  isolate->Dispose();
1704  V8::Dispose();
1705  V8::ShutdownPlatform();
1706  delete platform;
1707
1708  OnExit();
1709
1710  return result;
1711}
1712
1713}  // namespace v8
1714
1715
1716#ifndef GOOGLE3
1717int main(int argc, char* argv[]) {
1718  return v8::Shell::Main(argc, argv);
1719}
1720#endif
1721