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 
68 namespace v8 {
69 
70 
Throw(Isolate * isolate,const char * message)71 static Handle<Value> Throw(Isolate* isolate, const char* message) {
72   return isolate->ThrowException(String::NewFromUtf8(isolate, message));
73 }
74 
75 
76 
77 class PerIsolateData {
78  public:
PerIsolateData(Isolate * isolate)79   explicit PerIsolateData(Isolate* isolate) : isolate_(isolate), realms_(NULL) {
80     HandleScope scope(isolate);
81     isolate->SetData(0, this);
82   }
83 
~PerIsolateData()84   ~PerIsolateData() {
85     isolate_->SetData(0, NULL);  // Not really needed, just to be sure...
86   }
87 
Get(Isolate * isolate)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 
116 LineEditor *LineEditor::current_ = NULL;
117 
118 
LineEditor(Type type,const char * name)119 LineEditor::LineEditor(Type type, const char* name)
120     : type_(type), name_(name) {
121   if (current_ == NULL || current_->type_ < type) current_ = this;
122 }
123 
124 
125 class DumbLineEditor: public LineEditor {
126  public:
DumbLineEditor(Isolate * isolate)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 
Prompt(const char * prompt)135 Handle<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
147 CounterMap* Shell::counter_map_;
148 base::OS::MemoryMappedFile* Shell::counters_file_ = NULL;
149 CounterCollection Shell::local_counters_;
150 CounterCollection* Shell::counters_ = &local_counters_;
151 base::Mutex Shell::context_mutex_;
152 const base::TimeTicks Shell::kInitialTicks =
153     base::TimeTicks::HighResolutionNow();
154 Persistent<Context> Shell::utility_context_;
155 #endif  // !V8_SHARED
156 
157 Persistent<Context> Shell::evaluation_context_;
158 ShellOptions Shell::options;
159 const char* Shell::kPrompt = "d8> ";
160 
161 
162 #ifndef V8_SHARED
163 const int MB = 1024 * 1024;
164 
Match(void * key1,void * key2)165 bool 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.
ToCString(const v8::String::Utf8Value & value)174 const 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.
CompileString(Isolate * isolate,Local<String> source,Local<Value> name,v8::ScriptCompiler::CompileOptions compile_options)180 Local<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.
ExecuteString(Isolate * isolate,Handle<String> source,Handle<Value> name,bool print_result,bool report_exceptions)210 bool 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 
RealmScope(PerIsolateData * data)286 PerIsolateData::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 
~RealmScope()296 PerIsolateData::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 
RealmFind(Handle<Context> context)306 int 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 
RealmIndexOrThrow(const v8::FunctionCallbackInfo<v8::Value> & args,int arg_offset)314 int 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().
PerformanceNow(const v8::FunctionCallbackInfo<v8::Value> & args)336 void 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.
RealmCurrent(const v8::FunctionCallbackInfo<v8::Value> & args)351 void 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.
RealmOwner(const v8::FunctionCallbackInfo<v8::Value> & args)361 void 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.)
RealmGlobal(const v8::FunctionCallbackInfo<v8::Value> & args)376 void 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.
RealmCreate(const v8::FunctionCallbackInfo<v8::Value> & args)386 void 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.
RealmDispose(const v8::FunctionCallbackInfo<v8::Value> & args)404 void 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.
RealmSwitch(const v8::FunctionCallbackInfo<v8::Value> & args)419 void 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.
RealmEval(const v8::FunctionCallbackInfo<v8::Value> & args)429 void 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.
RealmSharedGet(Local<String> property,const PropertyCallbackInfo<Value> & info)451 void 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 
RealmSharedSet(Local<String> property,Local<Value> value,const PropertyCallbackInfo<void> & info)459 void 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 
Print(const v8::FunctionCallbackInfo<v8::Value> & args)468 void Shell::Print(const v8::FunctionCallbackInfo<v8::Value>& args) {
469   Write(args);
470   printf("\n");
471   fflush(stdout);
472 }
473 
474 
Write(const v8::FunctionCallbackInfo<v8::Value> & args)475 void 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 
Read(const v8::FunctionCallbackInfo<v8::Value> & args)500 void 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 
ReadFromStdin(Isolate * isolate)515 Handle<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 
Load(const v8::FunctionCallbackInfo<v8::Value> & args)548 void 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 
Quit(const v8::FunctionCallbackInfo<v8::Value> & args)573 void Shell::Quit(const v8::FunctionCallbackInfo<v8::Value>& args) {
574   int exit_code = args[0]->Int32Value();
575   OnExit();
576   exit(exit_code);
577 }
578 
579 
Version(const v8::FunctionCallbackInfo<v8::Value> & args)580 void Shell::Version(const v8::FunctionCallbackInfo<v8::Value>& args) {
581   args.GetReturnValue().Set(
582       String::NewFromUtf8(args.GetIsolate(), V8::GetVersion()));
583 }
584 
585 
ReportException(Isolate * isolate,v8::TryCatch * try_catch)586 void 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
GetCompletions(Isolate * isolate,Handle<String> text,Handle<String> full)637 Handle<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 
DebugMessageDetails(Isolate * isolate,Handle<String> message)656 Local<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 
DebugCommandToJSONRequest(Isolate * isolate,Handle<String> command)672 Local<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 
Bind(const char * name,bool is_histogram)688 int32_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 
AddSample(int32_t sample)698 void Counter::AddSample(int32_t sample) {
699   count_++;
700   sample_total_ += sample;
701 }
702 
703 
CounterCollection()704 CounterCollection::CounterCollection() {
705   magic_number_ = 0xDEADFACE;
706   max_counters_ = kMaxCounters;
707   max_name_size_ = Counter::kMaxNameSize;
708   counters_in_use_ = 0;
709 }
710 
711 
GetNextCounter()712 Counter* CounterCollection::GetNextCounter() {
713   if (counters_in_use_ == kMaxCounters) return NULL;
714   return &counters_[counters_in_use_++];
715 }
716 
717 
MapCounters(v8::Isolate * isolate,const char * name)718 void 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 
Hash(const char * name)734 int 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 
GetCounter(const char * name,bool is_histogram)745 Counter* 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 
LookupCounter(const char * name)761 int* 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 
CreateHistogram(const char * name,int min,int max,size_t buckets)772 void* Shell::CreateHistogram(const char* name,
773                              int min,
774                              int max,
775                              size_t buckets) {
776   return GetCounter(name, true);
777 }
778 
779 
AddHistogramSample(void * histogram,int sample)780 void Shell::AddHistogramSample(void* histogram, int sample) {
781   Counter* counter = reinterpret_cast<Counter*>(histogram);
782   counter->AddSample(sample);
783 }
784 
785 
InstallUtilityScript(Isolate * isolate)786 void 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
842 class BZip2Decompressor : public v8::StartupDataDecompressor {
843  public:
~BZip2Decompressor()844   virtual ~BZip2Decompressor() { }
845 
846  protected:
DecompressData(char * raw_data,int * raw_data_size,const char * compressed_data,int compressed_data_size)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 
CreateGlobalTemplate(Isolate * isolate)869 Handle<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 
Initialize(Isolate * isolate)924 void 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 
InitializeDebugger(Isolate * isolate)948 void 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 
CreateEvaluationContext(Isolate * isolate)959 Local<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 
Exit(int exit_code)990 void 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
1000 struct CounterAndKey {
1001   Counter* counter;
1002   const char* key;
1003 };
1004 
1005 
operator <(const CounterAndKey & lhs,const CounterAndKey & rhs)1006 inline bool operator<(const CounterAndKey& lhs, const CounterAndKey& rhs) {
1007   return strcmp(lhs.key, rhs.key) < 0;
1008 }
1009 #endif  // !V8_SHARED
1010 
1011 
OnExit()1012 void 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 
FOpen(const char * path,const char * mode)1055 static 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 
ReadChars(Isolate * isolate,const char * name,int * size_out)1076 static 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 
1096 struct DataAndPersistent {
1097   uint8_t* data;
1098   Persistent<ArrayBuffer> handle;
1099 };
1100 
1101 
ReadBufferWeakCallback(const v8::WeakCallbackData<ArrayBuffer,DataAndPersistent> & data)1102 static 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 
ReadBuffer(const v8::FunctionCallbackInfo<v8::Value> & args)1114 void 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.
ReadFile(Isolate * isolate,const char * name)1144 Handle<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 
RunShell(Isolate * isolate)1155 void 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 
~SourceGroup()1175 SourceGroup::~SourceGroup() {
1176 #ifndef V8_SHARED
1177   delete thread_;
1178   thread_ = NULL;
1179 #endif  // !V8_SHARED
1180 }
1181 
1182 
Execute(Isolate * isolate)1183 void 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 
ReadFile(Isolate * isolate,const char * name)1220 Handle<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
GetThreadOptions()1232 base::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 
ExecuteInThread()1241 void 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 
StartExecuteInThread()1276 void SourceGroup::StartExecuteInThread() {
1277   if (thread_ == NULL) {
1278     thread_ = new IsolateThread(this);
1279     thread_->Start();
1280   }
1281   next_semaphore_.Signal();
1282 }
1283 
1284 
WaitForThread()1285 void 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 
SetFlagsFromString(const char * flags)1296 void SetFlagsFromString(const char* flags) {
1297   v8::V8::SetFlagsFromString(flags, static_cast<int>(strlen(flags)));
1298 }
1299 
1300 
SetOptions(int argc,char * argv[])1301 bool 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 
RunMain(Isolate * isolate,int argc,char * argv[])1420 int 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
DumpHeapConstants(i::Isolate * isolate)1468 static 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 
1524 class ShellArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
1525  public:
Allocate(size_t length)1526   virtual void* Allocate(size_t length) {
1527     void* data = AllocateUninitialized(length);
1528     return data == NULL ? data : memset(data, 0, length);
1529   }
AllocateUninitialized(size_t length)1530   virtual void* AllocateUninitialized(size_t length) { return malloc(length); }
Free(void * data,size_t)1531   virtual void Free(void* data, size_t) { free(data); }
1532 };
1533 
1534 
1535 class MockArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
1536  public:
Allocate(size_t)1537   virtual void* Allocate(size_t) OVERRIDE {
1538     return malloc(0);
1539   }
AllocateUninitialized(size_t length)1540   virtual void* AllocateUninitialized(size_t length) OVERRIDE {
1541     return malloc(0);
1542   }
Free(void * p,size_t)1543   virtual void Free(void* p, size_t) OVERRIDE {
1544     free(p);
1545   }
1546 };
1547 
1548 
1549 #ifdef V8_USE_EXTERNAL_STARTUP_DATA
1550 class StartupDataHandler {
1551  public:
StartupDataHandler(const char * natives_blob,const char * snapshot_blob)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 
~StartupDataHandler()1558   ~StartupDataHandler() {
1559     delete[] natives_.data;
1560     delete[] snapshot_.data;
1561   }
1562 
1563  private:
Load(const char * blob_file,v8::StartupData * startup_data,void (* setter_fn)(v8::StartupData *))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 
Main(int argc,char * argv[])1602 int 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
main(int argc,char * argv[])1717 int main(int argc, char* argv[]) {
1718   return v8::Shell::Main(argc, argv);
1719 }
1720 #endif
1721