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"
15 #include "src/base/compiler-specific.h"
22 // A single counter in a counter collection.
25 static const int kMaxNameSize = 64;
26 int32_t* Bind(const char* name, bool histogram);
27 int32_t* ptr() { return &count_; }
28 int32_t count() { return count_; }
29 int32_t sample_total() { return sample_total_; }
30 bool is_histogram() { return is_histogram_; }
31 void AddSample(int32_t sample);
34 int32_t sample_total_;
36 uint8_t name_[kMaxNameSize];
40 // A set of counters and associated information. An instance of this
41 // class is stored directly in the memory-mapped counters file if
42 // the --map-counters options is used
43 class CounterCollection {
46 Counter* GetNextCounter();
48 static const unsigned kMaxCounters = 512;
49 uint32_t magic_number_;
50 uint32_t max_counters_;
51 uint32_t max_name_size_;
52 uint32_t counters_in_use_;
53 Counter counters_[kMaxCounters];
59 CounterMap(): hash_map_(Match) { }
60 Counter* Lookup(const char* name) {
61 i::HashMap::Entry* answer = hash_map_.Lookup(
62 const_cast<char*>(name),
65 if (!answer) return NULL;
66 return reinterpret_cast<Counter*>(answer->value);
68 void Set(const char* name, Counter* value) {
69 i::HashMap::Entry* answer = hash_map_.Lookup(
70 const_cast<char*>(name),
73 DCHECK(answer != NULL);
74 answer->value = value;
78 explicit Iterator(CounterMap* map)
79 : map_(&map->hash_map_), entry_(map_->Start()) { }
80 void Next() { entry_ = map_->Next(entry_); }
81 bool More() { return entry_ != NULL; }
82 const char* CurrentKey() { return static_cast<const char*>(entry_->key); }
83 Counter* CurrentValue() { return static_cast<Counter*>(entry_->value); }
86 i::HashMap::Entry* entry_;
90 static int Hash(const char* name);
91 static bool Match(void* key1, void* key2);
99 enum Type { DUMB = 0, READLINE = 1 };
100 LineEditor(Type type, const char* name);
101 virtual ~LineEditor() { }
103 virtual Handle<String> Prompt(const char* prompt) = 0;
104 virtual bool Open(Isolate* isolate) { return true; }
105 virtual bool Close() { return true; }
106 virtual void AddHistory(const char* str) { }
108 const char* name() { return name_; }
109 static LineEditor* Get() { return current_; }
113 static LineEditor* current_;
131 void Begin(char** argv, int offset) {
132 argv_ = const_cast<const char**>(argv);
133 begin_offset_ = offset;
136 void End(int offset) { end_offset_ = offset; }
138 void Execute(Isolate* isolate);
141 void StartExecuteInThread();
142 void WaitForThread();
145 class IsolateThread : public base::Thread {
147 explicit IsolateThread(SourceGroup* group)
148 : base::Thread(GetThreadOptions()), group_(group) {}
151 group_->ExecuteInThread();
158 static base::Thread::Options GetThreadOptions();
159 void ExecuteInThread();
161 base::Semaphore next_semaphore_;
162 base::Semaphore done_semaphore_;
163 base::Thread* thread_;
166 void ExitShell(int exit_code);
167 Handle<String> ReadFile(Isolate* isolate, const char* name);
175 class BinaryResource : public v8::String::ExternalOneByteStringResource {
177 BinaryResource(const char* string, int length)
187 virtual const char* data() const { return data_; }
188 virtual size_t length() const { return length_; }
199 : script_executed(false),
201 send_idle_notification(false),
202 invoke_weak_callbacks(false),
205 interactive_shell(false),
207 dump_heap_constants(false),
208 expected_to_throw(false),
209 mock_arraybuffer_allocator(false),
211 compile_options(v8::ScriptCompiler::kNoCompileOptions),
212 isolate_sources(NULL),
215 snapshot_blob(NULL) {}
218 delete[] isolate_sources;
221 bool use_interactive_shell() {
222 return (interactive_shell || !script_executed) && !test_shell;
225 bool script_executed;
227 bool send_idle_notification;
228 bool invoke_weak_callbacks;
231 bool interactive_shell;
233 bool dump_heap_constants;
234 bool expected_to_throw;
235 bool mock_arraybuffer_allocator;
237 v8::ScriptCompiler::CompileOptions compile_options;
238 SourceGroup* isolate_sources;
239 const char* icu_data_file;
240 const char* natives_blob;
241 const char* snapshot_blob;
247 class Shell : public i::AllStatic {
251 static Local<UnboundScript> CompileString(
252 Isolate* isolate, Local<String> source, Local<Value> name,
253 v8::ScriptCompiler::CompileOptions compile_options);
254 static bool ExecuteString(Isolate* isolate,
255 Handle<String> source,
258 bool report_exceptions);
259 static const char* ToCString(const v8::String::Utf8Value& value);
260 static void ReportException(Isolate* isolate, TryCatch* try_catch);
261 static Handle<String> ReadFile(Isolate* isolate, const char* name);
262 static Local<Context> CreateEvaluationContext(Isolate* isolate);
263 static int RunMain(Isolate* isolate, int argc, char* argv[]);
264 static int Main(int argc, char* argv[]);
265 static void Exit(int exit_code);
266 static void OnExit();
269 static Handle<Array> GetCompletions(Isolate* isolate,
271 Handle<String> full);
272 static int* LookupCounter(const char* name);
273 static void* CreateHistogram(const char* name,
277 static void AddHistogramSample(void* histogram, int sample);
278 static void MapCounters(v8::Isolate* isolate, const char* name);
280 static Local<Object> DebugMessageDetails(Isolate* isolate,
281 Handle<String> message);
282 static Local<Value> DebugCommandToJSONRequest(Isolate* isolate,
283 Handle<String> command);
285 static void PerformanceNow(const v8::FunctionCallbackInfo<v8::Value>& args);
288 static void RealmCurrent(const v8::FunctionCallbackInfo<v8::Value>& args);
289 static void RealmOwner(const v8::FunctionCallbackInfo<v8::Value>& args);
290 static void RealmGlobal(const v8::FunctionCallbackInfo<v8::Value>& args);
291 static void RealmCreate(const v8::FunctionCallbackInfo<v8::Value>& args);
292 static void RealmDispose(const v8::FunctionCallbackInfo<v8::Value>& args);
293 static void RealmSwitch(const v8::FunctionCallbackInfo<v8::Value>& args);
294 static void RealmEval(const v8::FunctionCallbackInfo<v8::Value>& args);
295 static void RealmSharedGet(Local<String> property,
296 const PropertyCallbackInfo<Value>& info);
297 static void RealmSharedSet(Local<String> property,
299 const PropertyCallbackInfo<void>& info);
301 static void Print(const v8::FunctionCallbackInfo<v8::Value>& args);
302 static void Write(const v8::FunctionCallbackInfo<v8::Value>& args);
303 static void Quit(const v8::FunctionCallbackInfo<v8::Value>& args);
304 static void Version(const v8::FunctionCallbackInfo<v8::Value>& args);
305 static void Read(const v8::FunctionCallbackInfo<v8::Value>& args);
306 static void ReadBuffer(const v8::FunctionCallbackInfo<v8::Value>& args);
307 static Handle<String> ReadFromStdin(Isolate* isolate);
308 static void ReadLine(const v8::FunctionCallbackInfo<v8::Value>& args) {
309 args.GetReturnValue().Set(ReadFromStdin(args.GetIsolate()));
311 static void Load(const v8::FunctionCallbackInfo<v8::Value>& args);
312 static void ArrayBuffer(const v8::FunctionCallbackInfo<v8::Value>& args);
313 static void Int8Array(const v8::FunctionCallbackInfo<v8::Value>& args);
314 static void Uint8Array(const v8::FunctionCallbackInfo<v8::Value>& args);
315 static void Int16Array(const v8::FunctionCallbackInfo<v8::Value>& args);
316 static void Uint16Array(const v8::FunctionCallbackInfo<v8::Value>& args);
317 static void Int32Array(const v8::FunctionCallbackInfo<v8::Value>& args);
318 static void Uint32Array(const v8::FunctionCallbackInfo<v8::Value>& args);
319 static void Float32Array(const v8::FunctionCallbackInfo<v8::Value>& args);
320 static void Float64Array(const v8::FunctionCallbackInfo<v8::Value>& args);
321 static void Uint8ClampedArray(
322 const v8::FunctionCallbackInfo<v8::Value>& args);
323 static void ArrayBufferSlice(const v8::FunctionCallbackInfo<v8::Value>& args);
324 static void ArraySubArray(const v8::FunctionCallbackInfo<v8::Value>& args);
325 static void ArraySet(const v8::FunctionCallbackInfo<v8::Value>& args);
326 // The OS object on the global object contains methods for performing
327 // operating system calls:
329 // os.system("program_name", ["arg1", "arg2", ...], timeout1, timeout2) will
330 // run the command, passing the arguments to the program. The standard output
331 // of the program will be picked up and returned as a multiline string. If
332 // timeout1 is present then it should be a number. -1 indicates no timeout
333 // and a positive number is used as a timeout in milliseconds that limits the
334 // time spent waiting between receiving output characters from the program.
335 // timeout2, if present, should be a number indicating the limit in
336 // milliseconds on the total running time of the program. Exceptions are
337 // thrown on timeouts or other errors or if the exit status of the program
338 // indicates an error.
340 // os.chdir(dir) changes directory to the given directory. Throws an
341 // exception/ on error.
343 // os.setenv(variable, value) sets an environment variable. Repeated calls to
344 // this method leak memory due to the API of setenv in the standard C library.
346 // os.umask(alue) calls the umask system call and returns the old umask.
348 // os.mkdirp(name, mask) creates a directory. The mask (if present) is anded
349 // with the current umask. Intermediate directories are created if necessary.
350 // An exception is not thrown if the directory already exists. Analogous to
351 // the "mkdir -p" command.
352 static void OSObject(const v8::FunctionCallbackInfo<v8::Value>& args);
353 static void System(const v8::FunctionCallbackInfo<v8::Value>& args);
354 static void ChangeDirectory(const v8::FunctionCallbackInfo<v8::Value>& args);
355 static void SetEnvironment(const v8::FunctionCallbackInfo<v8::Value>& args);
356 static void UnsetEnvironment(const v8::FunctionCallbackInfo<v8::Value>& args);
357 static void SetUMask(const v8::FunctionCallbackInfo<v8::Value>& args);
358 static void MakeDirectory(const v8::FunctionCallbackInfo<v8::Value>& args);
359 static void RemoveDirectory(const v8::FunctionCallbackInfo<v8::Value>& args);
361 static void AddOSMethods(v8::Isolate* isolate,
362 Handle<ObjectTemplate> os_template);
364 static const char* kPrompt;
365 static ShellOptions options;
368 static Persistent<Context> evaluation_context_;
370 static Persistent<Context> utility_context_;
371 static CounterMap* counter_map_;
372 // We statically allocate a set of local counters to be used if we
373 // don't want to store the stats in a memory-mapped file
374 static CounterCollection local_counters_;
375 static CounterCollection* counters_;
376 static base::OS::MemoryMappedFile* counters_file_;
377 static base::Mutex context_mutex_;
378 static const base::TimeTicks kInitialTicks;
380 static Counter* GetCounter(const char* name, bool is_histogram);
381 static void InstallUtilityScript(Isolate* isolate);
383 static void Initialize(Isolate* isolate);
384 static void InitializeDebugger(Isolate* isolate);
385 static void RunShell(Isolate* isolate);
386 static bool SetOptions(int argc, char* argv[]);
387 static Handle<ObjectTemplate> CreateGlobalTemplate(Isolate* isolate);
388 static Handle<FunctionTemplate> CreateArrayBufferTemplate(FunctionCallback);
389 static Handle<FunctionTemplate> CreateArrayTemplate(FunctionCallback);
390 static Handle<Value> CreateExternalArrayBuffer(Isolate* isolate,
391 Handle<Object> buffer,
393 static Handle<Object> CreateExternalArray(Isolate* isolate,
394 Handle<Object> array,
395 Handle<Object> buffer,
396 ExternalArrayType type,
400 int32_t element_size);
401 static void CreateExternalArray(
402 const v8::FunctionCallbackInfo<v8::Value>& args,
403 ExternalArrayType type,
404 int32_t element_size);
405 static void ExternalArrayWeakCallback(Isolate* isolate,
406 Persistent<Object>* object,