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.
9 #include "src/allocation.h"
10 #include "src/hashmap.h"
11 #include "src/smart-pointers.h"
14 #include "include/v8.h"
21 // A single counter in a counter collection.
24 static const int kMaxNameSize = 64;
25 int32_t* Bind(const char* name, bool histogram);
26 int32_t* ptr() { return &count_; }
27 int32_t count() { return count_; }
28 int32_t sample_total() { return sample_total_; }
29 bool is_histogram() { return is_histogram_; }
30 void AddSample(int32_t sample);
33 int32_t sample_total_;
35 uint8_t name_[kMaxNameSize];
39 // A set of counters and associated information. An instance of this
40 // class is stored directly in the memory-mapped counters file if
41 // the --map-counters options is used
42 class CounterCollection {
45 Counter* GetNextCounter();
47 static const unsigned kMaxCounters = 512;
48 uint32_t magic_number_;
49 uint32_t max_counters_;
50 uint32_t max_name_size_;
51 uint32_t counters_in_use_;
52 Counter counters_[kMaxCounters];
58 CounterMap(): hash_map_(Match) { }
59 Counter* Lookup(const char* name) {
60 i::HashMap::Entry* answer = hash_map_.Lookup(
61 const_cast<char*>(name),
64 if (!answer) return NULL;
65 return reinterpret_cast<Counter*>(answer->value);
67 void Set(const char* name, Counter* value) {
68 i::HashMap::Entry* answer = hash_map_.Lookup(
69 const_cast<char*>(name),
72 ASSERT(answer != NULL);
73 answer->value = value;
77 explicit Iterator(CounterMap* map)
78 : map_(&map->hash_map_), entry_(map_->Start()) { }
79 void Next() { entry_ = map_->Next(entry_); }
80 bool More() { return entry_ != NULL; }
81 const char* CurrentKey() { return static_cast<const char*>(entry_->key); }
82 Counter* CurrentValue() { return static_cast<Counter*>(entry_->value); }
85 i::HashMap::Entry* entry_;
89 static int Hash(const char* name);
90 static bool Match(void* key1, void* key2);
98 enum Type { DUMB = 0, READLINE = 1 };
99 LineEditor(Type type, const char* name);
100 virtual ~LineEditor() { }
102 virtual Handle<String> Prompt(const char* prompt) = 0;
103 virtual bool Open(Isolate* isolate) { return true; }
104 virtual bool Close() { return true; }
105 virtual void AddHistory(const char* str) { }
107 const char* name() { return name_; }
108 static LineEditor* Get() { return current_; }
112 static LineEditor* current_;
130 void Begin(char** argv, int offset) {
131 argv_ = const_cast<const char**>(argv);
132 begin_offset_ = offset;
135 void End(int offset) { end_offset_ = offset; }
137 void Execute(Isolate* isolate);
140 void StartExecuteInThread();
141 void WaitForThread();
144 class IsolateThread : public i::Thread {
146 explicit IsolateThread(SourceGroup* group)
147 : i::Thread(GetThreadOptions()), group_(group) {}
150 group_->ExecuteInThread();
157 static i::Thread::Options GetThreadOptions();
158 void ExecuteInThread();
160 i::Semaphore next_semaphore_;
161 i::Semaphore done_semaphore_;
165 void ExitShell(int exit_code);
166 Handle<String> ReadFile(Isolate* isolate, const char* name);
174 class BinaryResource : public v8::String::ExternalAsciiStringResource {
176 BinaryResource(const char* string, int length)
186 virtual const char* data() const { return data_; }
187 virtual size_t length() const { return length_; }
198 script_executed(false),
200 send_idle_notification(false),
201 invoke_weak_callbacks(false),
204 interactive_shell(false),
206 dump_heap_constants(false),
207 expected_to_throw(false),
208 mock_arraybuffer_allocator(false),
210 isolate_sources(NULL),
211 icu_data_file(NULL) { }
214 delete[] isolate_sources;
217 bool use_interactive_shell() {
218 return (interactive_shell || !script_executed) && !test_shell;
221 bool script_executed;
223 bool send_idle_notification;
224 bool invoke_weak_callbacks;
227 bool interactive_shell;
229 bool dump_heap_constants;
230 bool expected_to_throw;
231 bool mock_arraybuffer_allocator;
233 SourceGroup* isolate_sources;
234 const char* icu_data_file;
240 class Shell : public i::AllStatic {
244 static bool ExecuteString(Isolate* isolate,
245 Handle<String> source,
248 bool report_exceptions);
249 static const char* ToCString(const v8::String::Utf8Value& value);
250 static void ReportException(Isolate* isolate, TryCatch* try_catch);
251 static Handle<String> ReadFile(Isolate* isolate, const char* name);
252 static Local<Context> CreateEvaluationContext(Isolate* isolate);
253 static int RunMain(Isolate* isolate, int argc, char* argv[]);
254 static int Main(int argc, char* argv[]);
255 static void Exit(int exit_code);
256 static void OnExit();
259 static Handle<Array> GetCompletions(Isolate* isolate,
261 Handle<String> full);
262 static int* LookupCounter(const char* name);
263 static void* CreateHistogram(const char* name,
267 static void AddHistogramSample(void* histogram, int sample);
268 static void MapCounters(const char* name);
270 static Local<Object> DebugMessageDetails(Isolate* isolate,
271 Handle<String> message);
272 static Local<Value> DebugCommandToJSONRequest(Isolate* isolate,
273 Handle<String> command);
275 static void PerformanceNow(const v8::FunctionCallbackInfo<v8::Value>& args);
278 static void RealmCurrent(const v8::FunctionCallbackInfo<v8::Value>& args);
279 static void RealmOwner(const v8::FunctionCallbackInfo<v8::Value>& args);
280 static void RealmGlobal(const v8::FunctionCallbackInfo<v8::Value>& args);
281 static void RealmCreate(const v8::FunctionCallbackInfo<v8::Value>& args);
282 static void RealmDispose(const v8::FunctionCallbackInfo<v8::Value>& args);
283 static void RealmSwitch(const v8::FunctionCallbackInfo<v8::Value>& args);
284 static void RealmEval(const v8::FunctionCallbackInfo<v8::Value>& args);
285 static void RealmSharedGet(Local<String> property,
286 const PropertyCallbackInfo<Value>& info);
287 static void RealmSharedSet(Local<String> property,
289 const PropertyCallbackInfo<void>& info);
291 static void Print(const v8::FunctionCallbackInfo<v8::Value>& args);
292 static void Write(const v8::FunctionCallbackInfo<v8::Value>& args);
293 static void Quit(const v8::FunctionCallbackInfo<v8::Value>& args);
294 static void Version(const v8::FunctionCallbackInfo<v8::Value>& args);
295 static void Read(const v8::FunctionCallbackInfo<v8::Value>& args);
296 static void ReadBuffer(const v8::FunctionCallbackInfo<v8::Value>& args);
297 static Handle<String> ReadFromStdin(Isolate* isolate);
298 static void ReadLine(const v8::FunctionCallbackInfo<v8::Value>& args) {
299 args.GetReturnValue().Set(ReadFromStdin(args.GetIsolate()));
301 static void Load(const v8::FunctionCallbackInfo<v8::Value>& args);
302 static void ArrayBuffer(const v8::FunctionCallbackInfo<v8::Value>& args);
303 static void Int8Array(const v8::FunctionCallbackInfo<v8::Value>& args);
304 static void Uint8Array(const v8::FunctionCallbackInfo<v8::Value>& args);
305 static void Int16Array(const v8::FunctionCallbackInfo<v8::Value>& args);
306 static void Uint16Array(const v8::FunctionCallbackInfo<v8::Value>& args);
307 static void Int32Array(const v8::FunctionCallbackInfo<v8::Value>& args);
308 static void Uint32Array(const v8::FunctionCallbackInfo<v8::Value>& args);
309 static void Float32Array(const v8::FunctionCallbackInfo<v8::Value>& args);
310 static void Float32x4Array(const v8::FunctionCallbackInfo<v8::Value>& args);
311 static void Float64x2Array(const v8::FunctionCallbackInfo<v8::Value>& args);
312 static void Int32x4Array(const v8::FunctionCallbackInfo<v8::Value>& args);
313 static void Float64Array(const v8::FunctionCallbackInfo<v8::Value>& args);
314 static void Uint8ClampedArray(
315 const v8::FunctionCallbackInfo<v8::Value>& args);
316 static void ArrayBufferSlice(const v8::FunctionCallbackInfo<v8::Value>& args);
317 static void ArraySubArray(const v8::FunctionCallbackInfo<v8::Value>& args);
318 static void ArraySet(const v8::FunctionCallbackInfo<v8::Value>& args);
319 // The OS object on the global object contains methods for performing
320 // operating system calls:
322 // os.system("program_name", ["arg1", "arg2", ...], timeout1, timeout2) will
323 // run the command, passing the arguments to the program. The standard output
324 // of the program will be picked up and returned as a multiline string. If
325 // timeout1 is present then it should be a number. -1 indicates no timeout
326 // and a positive number is used as a timeout in milliseconds that limits the
327 // time spent waiting between receiving output characters from the program.
328 // timeout2, if present, should be a number indicating the limit in
329 // milliseconds on the total running time of the program. Exceptions are
330 // thrown on timeouts or other errors or if the exit status of the program
331 // indicates an error.
333 // os.chdir(dir) changes directory to the given directory. Throws an
334 // exception/ on error.
336 // os.setenv(variable, value) sets an environment variable. Repeated calls to
337 // this method leak memory due to the API of setenv in the standard C library.
339 // os.umask(alue) calls the umask system call and returns the old umask.
341 // os.mkdirp(name, mask) creates a directory. The mask (if present) is anded
342 // with the current umask. Intermediate directories are created if necessary.
343 // An exception is not thrown if the directory already exists. Analogous to
344 // the "mkdir -p" command.
345 static void OSObject(const v8::FunctionCallbackInfo<v8::Value>& args);
346 static void System(const v8::FunctionCallbackInfo<v8::Value>& args);
347 static void ChangeDirectory(const v8::FunctionCallbackInfo<v8::Value>& args);
348 static void SetEnvironment(const v8::FunctionCallbackInfo<v8::Value>& args);
349 static void UnsetEnvironment(const v8::FunctionCallbackInfo<v8::Value>& args);
350 static void SetUMask(const v8::FunctionCallbackInfo<v8::Value>& args);
351 static void MakeDirectory(const v8::FunctionCallbackInfo<v8::Value>& args);
352 static void RemoveDirectory(const v8::FunctionCallbackInfo<v8::Value>& args);
354 static void AddOSMethods(v8::Isolate* isolate,
355 Handle<ObjectTemplate> os_template);
357 static const char* kPrompt;
358 static ShellOptions options;
361 static Persistent<Context> evaluation_context_;
363 static Persistent<Context> utility_context_;
364 static CounterMap* counter_map_;
365 // We statically allocate a set of local counters to be used if we
366 // don't want to store the stats in a memory-mapped file
367 static CounterCollection local_counters_;
368 static CounterCollection* counters_;
369 static i::OS::MemoryMappedFile* counters_file_;
370 static i::Mutex context_mutex_;
371 static const i::TimeTicks kInitialTicks;
373 static Counter* GetCounter(const char* name, bool is_histogram);
374 static void InstallUtilityScript(Isolate* isolate);
376 static void Initialize(Isolate* isolate);
377 static void InitializeDebugger(Isolate* isolate);
378 static void RunShell(Isolate* isolate);
379 static bool SetOptions(int argc, char* argv[]);
380 static Handle<ObjectTemplate> CreateGlobalTemplate(Isolate* isolate);
381 static Handle<FunctionTemplate> CreateArrayBufferTemplate(FunctionCallback);
382 static Handle<FunctionTemplate> CreateArrayTemplate(FunctionCallback);
383 static Handle<Value> CreateExternalArrayBuffer(Isolate* isolate,
384 Handle<Object> buffer,
386 static Handle<Object> CreateExternalArray(Isolate* isolate,
387 Handle<Object> array,
388 Handle<Object> buffer,
389 ExternalArrayType type,
393 int32_t element_size);
394 static void CreateExternalArray(
395 const v8::FunctionCallbackInfo<v8::Value>& args,
396 ExternalArrayType type,
397 int32_t element_size);
398 static void ExternalArrayWeakCallback(Isolate* isolate,
399 Persistent<Object>* object,