Line data Source code
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 : #ifndef V8_D8_H_
6 : #define V8_D8_H_
7 :
8 : #include <iterator>
9 : #include <memory>
10 : #include <string>
11 : #include <vector>
12 :
13 : #include "src/allocation.h"
14 : #include "src/base/hashmap.h"
15 : #include "src/base/platform/time.h"
16 : #include "src/list.h"
17 : #include "src/utils.h"
18 :
19 : #include "src/base/once.h"
20 :
21 :
22 : namespace v8 {
23 :
24 :
25 : // A single counter in a counter collection.
26 : class Counter {
27 : public:
28 : static const int kMaxNameSize = 64;
29 : int32_t* Bind(const char* name, bool histogram);
30 : int32_t* ptr() { return &count_; }
31 : int32_t count() { return count_; }
32 : int32_t sample_total() { return sample_total_; }
33 : bool is_histogram() { return is_histogram_; }
34 : void AddSample(int32_t sample);
35 : private:
36 : int32_t count_;
37 : int32_t sample_total_;
38 : bool is_histogram_;
39 : uint8_t name_[kMaxNameSize];
40 : };
41 :
42 :
43 : // A set of counters and associated information. An instance of this
44 : // class is stored directly in the memory-mapped counters file if
45 : // the --map-counters options is used
46 : class CounterCollection {
47 : public:
48 : CounterCollection();
49 : Counter* GetNextCounter();
50 : private:
51 : static const unsigned kMaxCounters = 512;
52 : uint32_t magic_number_;
53 : uint32_t max_counters_;
54 : uint32_t max_name_size_;
55 : uint32_t counters_in_use_;
56 : Counter counters_[kMaxCounters];
57 : };
58 :
59 :
60 : class CounterMap {
61 : public:
62 : CounterMap(): hash_map_(Match) { }
63 0 : Counter* Lookup(const char* name) {
64 : base::HashMap::Entry* answer =
65 0 : hash_map_.Lookup(const_cast<char*>(name), Hash(name));
66 0 : if (!answer) return NULL;
67 0 : return reinterpret_cast<Counter*>(answer->value);
68 : }
69 0 : void Set(const char* name, Counter* value) {
70 : base::HashMap::Entry* answer =
71 0 : hash_map_.LookupOrInsert(const_cast<char*>(name), Hash(name));
72 : DCHECK(answer != NULL);
73 0 : answer->value = value;
74 0 : }
75 : class Iterator {
76 : public:
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 0 : const char* CurrentKey() { return static_cast<const char*>(entry_->key); }
82 0 : Counter* CurrentValue() { return static_cast<Counter*>(entry_->value); }
83 : private:
84 : base::CustomMatcherHashMap* map_;
85 : base::CustomMatcherHashMap::Entry* entry_;
86 : };
87 :
88 : private:
89 : static int Hash(const char* name);
90 : static bool Match(void* key1, void* key2);
91 : base::CustomMatcherHashMap hash_map_;
92 : };
93 :
94 :
95 : class SourceGroup {
96 : public:
97 28618 : SourceGroup() :
98 : next_semaphore_(0),
99 : done_semaphore_(0),
100 : thread_(NULL),
101 : argv_(NULL),
102 : begin_offset_(0),
103 28618 : end_offset_(0) {}
104 :
105 : ~SourceGroup();
106 :
107 : void Begin(char** argv, int offset) {
108 28618 : argv_ = const_cast<const char**>(argv);
109 28618 : begin_offset_ = offset;
110 : }
111 :
112 28618 : void End(int offset) { end_offset_ = offset; }
113 :
114 : void Execute(Isolate* isolate);
115 :
116 : void StartExecuteInThread();
117 : void WaitForThread();
118 : void JoinThread();
119 :
120 : private:
121 0 : class IsolateThread : public base::Thread {
122 : public:
123 : explicit IsolateThread(SourceGroup* group)
124 0 : : base::Thread(GetThreadOptions()), group_(group) {}
125 :
126 0 : virtual void Run() {
127 0 : group_->ExecuteInThread();
128 0 : }
129 :
130 : private:
131 : SourceGroup* group_;
132 : };
133 :
134 : static base::Thread::Options GetThreadOptions();
135 : void ExecuteInThread();
136 :
137 : base::Semaphore next_semaphore_;
138 : base::Semaphore done_semaphore_;
139 : base::Thread* thread_;
140 :
141 : void ExitShell(int exit_code);
142 : Local<String> ReadFile(Isolate* isolate, const char* name);
143 :
144 : const char** argv_;
145 : int begin_offset_;
146 : int end_offset_;
147 : };
148 :
149 : // The backing store of an ArrayBuffer or SharedArrayBuffer, after
150 : // Externalize() has been called on it.
151 : class ExternalizedContents {
152 : public:
153 60 : explicit ExternalizedContents(const ArrayBuffer::Contents& contents)
154 60 : : data_(contents.Data()), size_(contents.ByteLength()) {}
155 172 : explicit ExternalizedContents(const SharedArrayBuffer::Contents& contents)
156 172 : : data_(contents.Data()), size_(contents.ByteLength()) {}
157 : ExternalizedContents(ExternalizedContents&& other)
158 141 : : data_(other.data_), size_(other.size_) {
159 141 : other.data_ = nullptr;
160 141 : other.size_ = 0;
161 : }
162 : ExternalizedContents& operator=(ExternalizedContents&& other) {
163 0 : if (this != &other) {
164 0 : data_ = other.data_;
165 0 : size_ = other.size_;
166 0 : other.data_ = nullptr;
167 0 : other.size_ = 0;
168 : }
169 : return *this;
170 : }
171 : ~ExternalizedContents();
172 :
173 : private:
174 : void* data_;
175 : size_t size_;
176 :
177 : DISALLOW_COPY_AND_ASSIGN(ExternalizedContents);
178 : };
179 :
180 2232 : class SerializationData {
181 : public:
182 1116 : SerializationData() : size_(0) {}
183 :
184 : uint8_t* data() { return data_.get(); }
185 : size_t size() { return size_; }
186 : const std::vector<ArrayBuffer::Contents>& array_buffer_contents() {
187 : return array_buffer_contents_;
188 : }
189 : const std::vector<SharedArrayBuffer::Contents>&
190 : shared_array_buffer_contents() {
191 : return shared_array_buffer_contents_;
192 : }
193 :
194 861 : void AppendExternalizedContentsTo(std::vector<ExternalizedContents>* to) {
195 : to->insert(to->end(),
196 : std::make_move_iterator(externalized_contents_.begin()),
197 861 : std::make_move_iterator(externalized_contents_.end()));
198 : externalized_contents_.clear();
199 861 : }
200 :
201 : private:
202 : struct DataDeleter {
203 861 : void operator()(uint8_t* p) const { free(p); }
204 : };
205 :
206 : std::unique_ptr<uint8_t, DataDeleter> data_;
207 : size_t size_;
208 : std::vector<ArrayBuffer::Contents> array_buffer_contents_;
209 : std::vector<SharedArrayBuffer::Contents> shared_array_buffer_contents_;
210 : std::vector<ExternalizedContents> externalized_contents_;
211 :
212 : private:
213 : friend class Serializer;
214 :
215 : DISALLOW_COPY_AND_ASSIGN(SerializationData);
216 : };
217 :
218 :
219 1581 : class SerializationDataQueue {
220 : public:
221 : void Enqueue(std::unique_ptr<SerializationData> data);
222 : bool Dequeue(std::unique_ptr<SerializationData>* data);
223 : bool IsEmpty();
224 : void Clear();
225 :
226 : private:
227 : base::Mutex mutex_;
228 : std::vector<std::unique_ptr<SerializationData>> data_;
229 : };
230 :
231 :
232 : class Worker {
233 : public:
234 : Worker();
235 : ~Worker();
236 :
237 : // Run the given script on this Worker. This function should only be called
238 : // once, and should only be called by the thread that created the Worker.
239 : void StartExecuteInThread(const char* script);
240 : // Post a message to the worker's incoming message queue. The worker will
241 : // take ownership of the SerializationData.
242 : // This function should only be called by the thread that created the Worker.
243 : void PostMessage(std::unique_ptr<SerializationData> data);
244 : // Synchronously retrieve messages from the worker's outgoing message queue.
245 : // If there is no message in the queue, block until a message is available.
246 : // If there are no messages in the queue and the worker is no longer running,
247 : // return nullptr.
248 : // This function should only be called by the thread that created the Worker.
249 : std::unique_ptr<SerializationData> GetMessage();
250 : // Terminate the worker's event loop. Messages from the worker that have been
251 : // queued can still be read via GetMessage().
252 : // This function can be called by any thread.
253 : void Terminate();
254 : // Terminate and join the thread.
255 : // This function can be called by any thread.
256 : void WaitForThread();
257 :
258 : private:
259 527 : class WorkerThread : public base::Thread {
260 : public:
261 : explicit WorkerThread(Worker* worker)
262 : : base::Thread(base::Thread::Options("WorkerThread")),
263 527 : worker_(worker) {}
264 :
265 527 : virtual void Run() { worker_->ExecuteInThread(); }
266 :
267 : private:
268 : Worker* worker_;
269 : };
270 :
271 : void ExecuteInThread();
272 : static void PostMessageOut(const v8::FunctionCallbackInfo<v8::Value>& args);
273 :
274 : base::Semaphore in_semaphore_;
275 : base::Semaphore out_semaphore_;
276 : SerializationDataQueue in_queue_;
277 : SerializationDataQueue out_queue_;
278 : base::Thread* thread_;
279 : char* script_;
280 : base::Atomic32 running_;
281 : };
282 :
283 : class ShellOptions {
284 : public:
285 : ShellOptions()
286 : : script_executed(false),
287 : send_idle_notification(false),
288 : invoke_weak_callbacks(false),
289 : omit_quit(false),
290 : stress_opt(false),
291 : stress_deopt(false),
292 : stress_runs(1),
293 : interactive_shell(false),
294 : test_shell(false),
295 : expected_to_throw(false),
296 : mock_arraybuffer_allocator(false),
297 : enable_inspector(false),
298 : num_isolates(1),
299 : compile_options(v8::ScriptCompiler::kNoCompileOptions),
300 : isolate_sources(NULL),
301 : icu_data_file(NULL),
302 : natives_blob(NULL),
303 : snapshot_blob(NULL),
304 : trace_enabled(false),
305 : trace_config(NULL),
306 28618 : lcov_file(NULL) {}
307 :
308 0 : ~ShellOptions() {
309 0 : delete[] isolate_sources;
310 0 : }
311 :
312 : bool use_interactive_shell() {
313 57236 : return (interactive_shell || !script_executed) && !test_shell;
314 : }
315 :
316 : bool script_executed;
317 : bool send_idle_notification;
318 : bool invoke_weak_callbacks;
319 : bool omit_quit;
320 : bool stress_opt;
321 : bool stress_deopt;
322 : int stress_runs;
323 : bool interactive_shell;
324 : bool test_shell;
325 : bool expected_to_throw;
326 : bool mock_arraybuffer_allocator;
327 : bool enable_inspector;
328 : int num_isolates;
329 : v8::ScriptCompiler::CompileOptions compile_options;
330 : SourceGroup* isolate_sources;
331 : const char* icu_data_file;
332 : const char* natives_blob;
333 : const char* snapshot_blob;
334 : bool trace_enabled;
335 : const char* trace_config;
336 : const char* lcov_file;
337 : };
338 :
339 : class Shell : public i::AllStatic {
340 : public:
341 : static MaybeLocal<Script> CompileString(
342 : Isolate* isolate, Local<String> source, Local<Value> name,
343 : v8::ScriptCompiler::CompileOptions compile_options);
344 : static bool ExecuteString(Isolate* isolate, Local<String> source,
345 : Local<Value> name, bool print_result,
346 : bool report_exceptions);
347 : static bool ExecuteModule(Isolate* isolate, const char* file_name);
348 : static void ReportException(Isolate* isolate, TryCatch* try_catch);
349 : static Local<String> ReadFile(Isolate* isolate, const char* name);
350 : static Local<Context> CreateEvaluationContext(Isolate* isolate);
351 : static int RunMain(Isolate* isolate, int argc, char* argv[], bool last_run);
352 : static int Main(int argc, char* argv[]);
353 : static void Exit(int exit_code);
354 : static void OnExit(Isolate* isolate);
355 : static void CollectGarbage(Isolate* isolate);
356 : static void EmptyMessageQueues(Isolate* isolate);
357 :
358 : static std::unique_ptr<SerializationData> SerializeValue(
359 : Isolate* isolate, Local<Value> value, Local<Value> transfer);
360 : static MaybeLocal<Value> DeserializeValue(
361 : Isolate* isolate, std::unique_ptr<SerializationData> data);
362 : static void CleanupWorkers();
363 : static int* LookupCounter(const char* name);
364 : static void* CreateHistogram(const char* name,
365 : int min,
366 : int max,
367 : size_t buckets);
368 : static void AddHistogramSample(void* histogram, int sample);
369 : static void MapCounters(v8::Isolate* isolate, const char* name);
370 :
371 : static void PerformanceNow(const v8::FunctionCallbackInfo<v8::Value>& args);
372 :
373 : static void RealmCurrent(const v8::FunctionCallbackInfo<v8::Value>& args);
374 : static void RealmOwner(const v8::FunctionCallbackInfo<v8::Value>& args);
375 : static void RealmGlobal(const v8::FunctionCallbackInfo<v8::Value>& args);
376 : static void RealmCreate(const v8::FunctionCallbackInfo<v8::Value>& args);
377 : static void RealmNavigate(const v8::FunctionCallbackInfo<v8::Value>& args);
378 : static void RealmCreateAllowCrossRealmAccess(
379 : const v8::FunctionCallbackInfo<v8::Value>& args);
380 : static void RealmDispose(const v8::FunctionCallbackInfo<v8::Value>& args);
381 : static void RealmSwitch(const v8::FunctionCallbackInfo<v8::Value>& args);
382 : static void RealmEval(const v8::FunctionCallbackInfo<v8::Value>& args);
383 : static void RealmSharedGet(Local<String> property,
384 : const PropertyCallbackInfo<Value>& info);
385 : static void RealmSharedSet(Local<String> property,
386 : Local<Value> value,
387 : const PropertyCallbackInfo<void>& info);
388 :
389 : static void Print(const v8::FunctionCallbackInfo<v8::Value>& args);
390 : static void PrintErr(const v8::FunctionCallbackInfo<v8::Value>& args);
391 : static void Write(const v8::FunctionCallbackInfo<v8::Value>& args);
392 : static void QuitOnce(v8::FunctionCallbackInfo<v8::Value>* args);
393 : static void Quit(const v8::FunctionCallbackInfo<v8::Value>& args);
394 : static void Version(const v8::FunctionCallbackInfo<v8::Value>& args);
395 : static void Read(const v8::FunctionCallbackInfo<v8::Value>& args);
396 : static void ReadBuffer(const v8::FunctionCallbackInfo<v8::Value>& args);
397 : static Local<String> ReadFromStdin(Isolate* isolate);
398 0 : static void ReadLine(const v8::FunctionCallbackInfo<v8::Value>& args) {
399 0 : args.GetReturnValue().Set(ReadFromStdin(args.GetIsolate()));
400 0 : }
401 : static void Load(const v8::FunctionCallbackInfo<v8::Value>& args);
402 : static void WorkerNew(const v8::FunctionCallbackInfo<v8::Value>& args);
403 : static void WorkerPostMessage(
404 : const v8::FunctionCallbackInfo<v8::Value>& args);
405 : static void WorkerGetMessage(const v8::FunctionCallbackInfo<v8::Value>& args);
406 : static void WorkerTerminate(const v8::FunctionCallbackInfo<v8::Value>& args);
407 : // The OS object on the global object contains methods for performing
408 : // operating system calls:
409 : //
410 : // os.system("program_name", ["arg1", "arg2", ...], timeout1, timeout2) will
411 : // run the command, passing the arguments to the program. The standard output
412 : // of the program will be picked up and returned as a multiline string. If
413 : // timeout1 is present then it should be a number. -1 indicates no timeout
414 : // and a positive number is used as a timeout in milliseconds that limits the
415 : // time spent waiting between receiving output characters from the program.
416 : // timeout2, if present, should be a number indicating the limit in
417 : // milliseconds on the total running time of the program. Exceptions are
418 : // thrown on timeouts or other errors or if the exit status of the program
419 : // indicates an error.
420 : //
421 : // os.chdir(dir) changes directory to the given directory. Throws an
422 : // exception/ on error.
423 : //
424 : // os.setenv(variable, value) sets an environment variable. Repeated calls to
425 : // this method leak memory due to the API of setenv in the standard C library.
426 : //
427 : // os.umask(alue) calls the umask system call and returns the old umask.
428 : //
429 : // os.mkdirp(name, mask) creates a directory. The mask (if present) is anded
430 : // with the current umask. Intermediate directories are created if necessary.
431 : // An exception is not thrown if the directory already exists. Analogous to
432 : // the "mkdir -p" command.
433 : static void System(const v8::FunctionCallbackInfo<v8::Value>& args);
434 : static void ChangeDirectory(const v8::FunctionCallbackInfo<v8::Value>& args);
435 : static void SetEnvironment(const v8::FunctionCallbackInfo<v8::Value>& args);
436 : static void UnsetEnvironment(const v8::FunctionCallbackInfo<v8::Value>& args);
437 : static void SetUMask(const v8::FunctionCallbackInfo<v8::Value>& args);
438 : static void MakeDirectory(const v8::FunctionCallbackInfo<v8::Value>& args);
439 : static void RemoveDirectory(const v8::FunctionCallbackInfo<v8::Value>& args);
440 : static void HostImportModuleDynamically(Isolate* isolate,
441 : Local<String> referrer,
442 : Local<String> specifier,
443 : Local<DynamicImportResult> result);
444 :
445 : // Data is of type DynamicImportData*. We use void* here to be able
446 : // to conform with MicrotaskCallback interface and enqueue this
447 : // function in the microtask queue.
448 : static void DoHostImportModuleDynamically(void* data);
449 : static void AddOSMethods(v8::Isolate* isolate,
450 : Local<ObjectTemplate> os_template);
451 :
452 : static const char* kPrompt;
453 : static ShellOptions options;
454 : static ArrayBuffer::Allocator* array_buffer_allocator;
455 :
456 : private:
457 : static Global<Context> evaluation_context_;
458 : static base::OnceType quit_once_;
459 : static Global<Function> stringify_function_;
460 : static CounterMap* counter_map_;
461 : // We statically allocate a set of local counters to be used if we
462 : // don't want to store the stats in a memory-mapped file
463 : static CounterCollection local_counters_;
464 : static CounterCollection* counters_;
465 : static base::OS::MemoryMappedFile* counters_file_;
466 : static base::LazyMutex context_mutex_;
467 : static const base::TimeTicks kInitialTicks;
468 :
469 : static base::LazyMutex workers_mutex_;
470 : static bool allow_new_workers_;
471 : static i::List<Worker*> workers_;
472 : static std::vector<ExternalizedContents> externalized_contents_;
473 :
474 : static void WriteIgnitionDispatchCountersFile(v8::Isolate* isolate);
475 : // Append LCOV coverage data to file.
476 : static void WriteLcovData(v8::Isolate* isolate, const char* file);
477 : static Counter* GetCounter(const char* name, bool is_histogram);
478 : static Local<String> Stringify(Isolate* isolate, Local<Value> value);
479 : static void Initialize(Isolate* isolate);
480 : static void RunShell(Isolate* isolate);
481 : static bool SetOptions(int argc, char* argv[]);
482 : static Local<ObjectTemplate> CreateGlobalTemplate(Isolate* isolate);
483 : static MaybeLocal<Context> CreateRealm(
484 : const v8::FunctionCallbackInfo<v8::Value>& args, int index,
485 : v8::MaybeLocal<Value> global_object);
486 : static void DisposeRealm(const v8::FunctionCallbackInfo<v8::Value>& args,
487 : int index);
488 : static MaybeLocal<Module> FetchModuleTree(v8::Local<v8::Context> context,
489 : const std::string& file_name);
490 : };
491 :
492 :
493 : } // namespace v8
494 :
495 :
496 : #endif // V8_D8_H_
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