// Copyright 2012 the V8 project authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. // Defined when linking against shared lib on Windows. #if defined(USING_V8_SHARED) && !defined(V8_SHARED) #define V8_SHARED #endif #include <errno.h> #include <stdlib.h> #include <string.h> #include <sys/stat.h> #ifdef V8_SHARED #include <assert.h> #endif // V8_SHARED #ifndef V8_SHARED #include <algorithm> #endif // !V8_SHARED #ifdef V8_SHARED #include "include/v8-testing.h" #endif // V8_SHARED #if !defined(V8_SHARED) && defined(ENABLE_GDB_JIT_INTERFACE) #include "src/gdb-jit.h" #endif #ifdef ENABLE_VTUNE_JIT_INTERFACE #include "src/third_party/vtune/v8-vtune.h" #endif #include "src/d8.h" #include "include/libplatform/libplatform.h" #ifndef V8_SHARED #include "src/api.h" #include "src/base/cpu.h" #include "src/base/logging.h" #include "src/base/platform/platform.h" #include "src/base/sys-info.h" #include "src/basic-block-profiler.h" #include "src/d8-debug.h" #include "src/debug.h" #include "src/snapshot/natives.h" #include "src/v8.h" #endif // !V8_SHARED #ifdef V8_USE_EXTERNAL_STARTUP_DATA #include "src/startup-data-util.h" #endif // V8_USE_EXTERNAL_STARTUP_DATA #if !defined(_WIN32) && !defined(_WIN64) #include <unistd.h> // NOLINT #else #include <windows.h> // NOLINT #if defined(_MSC_VER) #include <crtdbg.h> // NOLINT #endif // defined(_MSC_VER) #endif // !defined(_WIN32) && !defined(_WIN64) #ifndef DCHECK #define DCHECK(condition) assert(condition) #endif #ifndef CHECK #define CHECK(condition) assert(condition) #endif namespace v8 { namespace { const int MB = 1024 * 1024; class ShellArrayBufferAllocator : public v8::ArrayBuffer::Allocator { public: virtual void* Allocate(size_t length) { void* data = AllocateUninitialized(length); return data == NULL ? data : memset(data, 0, length); } virtual void* AllocateUninitialized(size_t length) { return malloc(length); } virtual void Free(void* data, size_t) { free(data); } }; class MockArrayBufferAllocator : public v8::ArrayBuffer::Allocator { public: void* Allocate(size_t length) override { size_t actual_length = length > 10 * MB ? 1 : length; void* data = AllocateUninitialized(actual_length); return data == NULL ? data : memset(data, 0, actual_length); } void* AllocateUninitialized(size_t length) override { return length > 10 * MB ? malloc(1) : malloc(length); } void Free(void* p, size_t) override { free(p); } }; v8::Platform* g_platform = NULL; } // namespace static Handle<Value> Throw(Isolate* isolate, const char* message) { return isolate->ThrowException(String::NewFromUtf8(isolate, message)); } class PerIsolateData { public: explicit PerIsolateData(Isolate* isolate) : isolate_(isolate), realms_(NULL) { HandleScope scope(isolate); isolate->SetData(0, this); } ~PerIsolateData() { isolate_->SetData(0, NULL); // Not really needed, just to be sure... } inline static PerIsolateData* Get(Isolate* isolate) { return reinterpret_cast<PerIsolateData*>(isolate->GetData(0)); } class RealmScope { public: explicit RealmScope(PerIsolateData* data); ~RealmScope(); private: PerIsolateData* data_; }; private: friend class Shell; friend class RealmScope; Isolate* isolate_; int realm_count_; int realm_current_; int realm_switch_; Persistent<Context>* realms_; Persistent<Value> realm_shared_; int RealmIndexOrThrow(const v8::FunctionCallbackInfo<v8::Value>& args, int arg_offset); int RealmFind(Handle<Context> context); }; LineEditor *LineEditor::current_ = NULL; LineEditor::LineEditor(Type type, const char* name) : type_(type), name_(name) { if (current_ == NULL || current_->type_ < type) current_ = this; } class DumbLineEditor: public LineEditor { public: explicit DumbLineEditor(Isolate* isolate) : LineEditor(LineEditor::DUMB, "dumb"), isolate_(isolate) { } virtual Handle<String> Prompt(const char* prompt); private: Isolate* isolate_; }; Handle<String> DumbLineEditor::Prompt(const char* prompt) { printf("%s", prompt); #if defined(__native_client__) // Native Client libc is used to being embedded in Chrome and // has trouble recognizing when to flush. fflush(stdout); #endif return Shell::ReadFromStdin(isolate_); } #ifndef V8_SHARED CounterMap* Shell::counter_map_; base::OS::MemoryMappedFile* Shell::counters_file_ = NULL; CounterCollection Shell::local_counters_; CounterCollection* Shell::counters_ = &local_counters_; base::Mutex Shell::context_mutex_; const base::TimeTicks Shell::kInitialTicks = base::TimeTicks::HighResolutionNow(); Persistent<Context> Shell::utility_context_; #endif // !V8_SHARED Persistent<Context> Shell::evaluation_context_; ShellOptions Shell::options; const char* Shell::kPrompt = "d8> "; #ifndef V8_SHARED bool CounterMap::Match(void* key1, void* key2) { const char* name1 = reinterpret_cast<const char*>(key1); const char* name2 = reinterpret_cast<const char*>(key2); return strcmp(name1, name2) == 0; } #endif // !V8_SHARED // Converts a V8 value to a C string. const char* Shell::ToCString(const v8::String::Utf8Value& value) { return *value ? *value : "<string conversion failed>"; } ScriptCompiler::CachedData* CompileForCachedData( Local<String> source, Local<Value> name, ScriptCompiler::CompileOptions compile_options) { int source_length = source->Length(); uint16_t* source_buffer = new uint16_t[source_length]; source->Write(source_buffer, 0, source_length); int name_length = 0; uint16_t* name_buffer = NULL; if (name->IsString()) { Local<String> name_string = Local<String>::Cast(name); name_length = name_string->Length(); name_buffer = new uint16_t[name_length]; name_string->Write(name_buffer, 0, name_length); } ShellArrayBufferAllocator allocator; Isolate::CreateParams create_params; create_params.array_buffer_allocator = &allocator; Isolate* temp_isolate = Isolate::New(create_params); ScriptCompiler::CachedData* result = NULL; { Isolate::Scope isolate_scope(temp_isolate); HandleScope handle_scope(temp_isolate); Context::Scope context_scope(Context::New(temp_isolate)); Local<String> source_copy = v8::String::NewFromTwoByte( temp_isolate, source_buffer, v8::String::kNormalString, source_length); Local<Value> name_copy; if (name_buffer) { name_copy = v8::String::NewFromTwoByte( temp_isolate, name_buffer, v8::String::kNormalString, name_length); } else { name_copy = v8::Undefined(temp_isolate); } ScriptCompiler::Source script_source(source_copy, ScriptOrigin(name_copy)); ScriptCompiler::CompileUnbound(temp_isolate, &script_source, compile_options); if (script_source.GetCachedData()) { int length = script_source.GetCachedData()->length; uint8_t* cache = new uint8_t[length]; memcpy(cache, script_source.GetCachedData()->data, length); result = new ScriptCompiler::CachedData( cache, length, ScriptCompiler::CachedData::BufferOwned); } } temp_isolate->Dispose(); delete[] source_buffer; delete[] name_buffer; return result; } // Compile a string within the current v8 context. Local<Script> Shell::CompileString( Isolate* isolate, Local<String> source, Local<Value> name, ScriptCompiler::CompileOptions compile_options, SourceType source_type) { ScriptOrigin origin(name); if (compile_options == ScriptCompiler::kNoCompileOptions) { ScriptCompiler::Source script_source(source, origin); return source_type == SCRIPT ? ScriptCompiler::Compile(isolate, &script_source, compile_options) : ScriptCompiler::CompileModule(isolate, &script_source, compile_options); } ScriptCompiler::CachedData* data = CompileForCachedData(source, name, compile_options); ScriptCompiler::Source cached_source(source, origin, data); if (compile_options == ScriptCompiler::kProduceCodeCache) { compile_options = ScriptCompiler::kConsumeCodeCache; } else if (compile_options == ScriptCompiler::kProduceParserCache) { compile_options = ScriptCompiler::kConsumeParserCache; } else { DCHECK(false); // A new compile option? } if (data == NULL) compile_options = ScriptCompiler::kNoCompileOptions; Local<Script> result = source_type == SCRIPT ? ScriptCompiler::Compile(isolate, &cached_source, compile_options) : ScriptCompiler::CompileModule(isolate, &cached_source, compile_options); CHECK(data == NULL || !data->rejected); return result; } // Executes a string within the current v8 context. bool Shell::ExecuteString(Isolate* isolate, Handle<String> source, Handle<Value> name, bool print_result, bool report_exceptions, SourceType source_type) { #ifndef V8_SHARED bool FLAG_debugger = i::FLAG_debugger; #else bool FLAG_debugger = false; #endif // !V8_SHARED HandleScope handle_scope(isolate); TryCatch try_catch(isolate); options.script_executed = true; if (FLAG_debugger) { // When debugging make exceptions appear to be uncaught. try_catch.SetVerbose(true); } Handle<Value> result; { PerIsolateData* data = PerIsolateData::Get(isolate); Local<Context> realm = Local<Context>::New(isolate, data->realms_[data->realm_current_]); Context::Scope context_scope(realm); Handle<Script> script = Shell::CompileString( isolate, source, name, options.compile_options, source_type); if (script.IsEmpty()) { // Print errors that happened during compilation. if (report_exceptions && !FLAG_debugger) ReportException(isolate, &try_catch); return false; } result = script->Run(); data->realm_current_ = data->realm_switch_; } if (result.IsEmpty()) { DCHECK(try_catch.HasCaught()); // Print errors that happened during execution. if (report_exceptions && !FLAG_debugger) ReportException(isolate, &try_catch); return false; } DCHECK(!try_catch.HasCaught()); if (print_result) { #if !defined(V8_SHARED) if (options.test_shell) { #endif if (!result->IsUndefined()) { // If all went well and the result wasn't undefined then print // the returned value. v8::String::Utf8Value str(result); fwrite(*str, sizeof(**str), str.length(), stdout); printf("\n"); } #if !defined(V8_SHARED) } else { v8::TryCatch try_catch(isolate); v8::Local<v8::Context> context = v8::Local<v8::Context>::New(isolate, utility_context_); v8::Context::Scope context_scope(context); Handle<Object> global = context->Global(); Handle<Value> fun = global->Get(String::NewFromUtf8(isolate, "Stringify")); Handle<Value> argv[1] = {result}; Handle<Value> s = Handle<Function>::Cast(fun)->Call(global, 1, argv); if (try_catch.HasCaught()) return true; v8::String::Utf8Value str(s); fwrite(*str, sizeof(**str), str.length(), stdout); printf("\n"); } #endif } return true; } PerIsolateData::RealmScope::RealmScope(PerIsolateData* data) : data_(data) { data_->realm_count_ = 1; data_->realm_current_ = 0; data_->realm_switch_ = 0; data_->realms_ = new Persistent<Context>[1]; data_->realms_[0].Reset(data_->isolate_, data_->isolate_->GetEnteredContext()); } PerIsolateData::RealmScope::~RealmScope() { // Drop realms to avoid keeping them alive. for (int i = 0; i < data_->realm_count_; ++i) data_->realms_[i].Reset(); delete[] data_->realms_; if (!data_->realm_shared_.IsEmpty()) data_->realm_shared_.Reset(); } int PerIsolateData::RealmFind(Handle<Context> context) { for (int i = 0; i < realm_count_; ++i) { if (realms_[i] == context) return i; } return -1; } int PerIsolateData::RealmIndexOrThrow( const v8::FunctionCallbackInfo<v8::Value>& args, int arg_offset) { if (args.Length() < arg_offset || !args[arg_offset]->IsNumber()) { Throw(args.GetIsolate(), "Invalid argument"); return -1; } int index = args[arg_offset]->Int32Value(); if (index < 0 || index >= realm_count_ || realms_[index].IsEmpty()) { Throw(args.GetIsolate(), "Invalid realm index"); return -1; } return index; } #ifndef V8_SHARED // performance.now() returns a time stamp as double, measured in milliseconds. // When FLAG_verify_predictable mode is enabled it returns current value // of Heap::allocations_count(). void Shell::PerformanceNow(const v8::FunctionCallbackInfo<v8::Value>& args) { if (i::FLAG_verify_predictable) { Isolate* v8_isolate = args.GetIsolate(); i::Heap* heap = reinterpret_cast<i::Isolate*>(v8_isolate)->heap(); args.GetReturnValue().Set(heap->synthetic_time()); } else { base::TimeDelta delta = base::TimeTicks::HighResolutionNow() - kInitialTicks; args.GetReturnValue().Set(delta.InMillisecondsF()); } } #endif // !V8_SHARED // Realm.current() returns the index of the currently active realm. void Shell::RealmCurrent(const v8::FunctionCallbackInfo<v8::Value>& args) { Isolate* isolate = args.GetIsolate(); PerIsolateData* data = PerIsolateData::Get(isolate); int index = data->RealmFind(isolate->GetEnteredContext()); if (index == -1) return; args.GetReturnValue().Set(index); } // Realm.owner(o) returns the index of the realm that created o. void Shell::RealmOwner(const v8::FunctionCallbackInfo<v8::Value>& args) { Isolate* isolate = args.GetIsolate(); PerIsolateData* data = PerIsolateData::Get(isolate); if (args.Length() < 1 || !args[0]->IsObject()) { Throw(args.GetIsolate(), "Invalid argument"); return; } int index = data->RealmFind(args[0]->ToObject(isolate)->CreationContext()); if (index == -1) return; args.GetReturnValue().Set(index); } // Realm.global(i) returns the global object of realm i. // (Note that properties of global objects cannot be read/written cross-realm.) void Shell::RealmGlobal(const v8::FunctionCallbackInfo<v8::Value>& args) { PerIsolateData* data = PerIsolateData::Get(args.GetIsolate()); int index = data->RealmIndexOrThrow(args, 0); if (index == -1) return; args.GetReturnValue().Set( Local<Context>::New(args.GetIsolate(), data->realms_[index])->Global()); } // Realm.create() creates a new realm and returns its index. void Shell::RealmCreate(const v8::FunctionCallbackInfo<v8::Value>& args) { Isolate* isolate = args.GetIsolate(); PerIsolateData* data = PerIsolateData::Get(isolate); Persistent<Context>* old_realms = data->realms_; int index = data->realm_count_; data->realms_ = new Persistent<Context>[++data->realm_count_]; for (int i = 0; i < index; ++i) { data->realms_[i].Reset(isolate, old_realms[i]); } delete[] old_realms; Handle<ObjectTemplate> global_template = CreateGlobalTemplate(isolate); data->realms_[index].Reset( isolate, Context::New(isolate, NULL, global_template)); args.GetReturnValue().Set(index); } // Realm.dispose(i) disposes the reference to the realm i. void Shell::RealmDispose(const v8::FunctionCallbackInfo<v8::Value>& args) { Isolate* isolate = args.GetIsolate(); PerIsolateData* data = PerIsolateData::Get(isolate); int index = data->RealmIndexOrThrow(args, 0); if (index == -1) return; if (index == 0 || index == data->realm_current_ || index == data->realm_switch_) { Throw(args.GetIsolate(), "Invalid realm index"); return; } data->realms_[index].Reset(); isolate->ContextDisposedNotification(); isolate->IdleNotificationDeadline(g_platform->MonotonicallyIncreasingTime()); } // Realm.switch(i) switches to the realm i for consecutive interactive inputs. void Shell::RealmSwitch(const v8::FunctionCallbackInfo<v8::Value>& args) { Isolate* isolate = args.GetIsolate(); PerIsolateData* data = PerIsolateData::Get(isolate); int index = data->RealmIndexOrThrow(args, 0); if (index == -1) return; data->realm_switch_ = index; } // Realm.eval(i, s) evaluates s in realm i and returns the result. void Shell::RealmEval(const v8::FunctionCallbackInfo<v8::Value>& args) { Isolate* isolate = args.GetIsolate(); PerIsolateData* data = PerIsolateData::Get(isolate); int index = data->RealmIndexOrThrow(args, 0); if (index == -1) return; if (args.Length() < 2 || !args[1]->IsString()) { Throw(args.GetIsolate(), "Invalid argument"); return; } ScriptCompiler::Source script_source(args[1]->ToString(isolate)); Handle<UnboundScript> script = ScriptCompiler::CompileUnbound( isolate, &script_source); if (script.IsEmpty()) return; Local<Context> realm = Local<Context>::New(isolate, data->realms_[index]); realm->Enter(); Handle<Value> result = script->BindToCurrentContext()->Run(); realm->Exit(); args.GetReturnValue().Set(result); } // Realm.shared is an accessor for a single shared value across realms. void Shell::RealmSharedGet(Local<String> property, const PropertyCallbackInfo<Value>& info) { Isolate* isolate = info.GetIsolate(); PerIsolateData* data = PerIsolateData::Get(isolate); if (data->realm_shared_.IsEmpty()) return; info.GetReturnValue().Set(data->realm_shared_); } void Shell::RealmSharedSet(Local<String> property, Local<Value> value, const PropertyCallbackInfo<void>& info) { Isolate* isolate = info.GetIsolate(); PerIsolateData* data = PerIsolateData::Get(isolate); data->realm_shared_.Reset(isolate, value); } void Shell::Print(const v8::FunctionCallbackInfo<v8::Value>& args) { Write(args); printf("\n"); fflush(stdout); } void Shell::Write(const v8::FunctionCallbackInfo<v8::Value>& args) { for (int i = 0; i < args.Length(); i++) { HandleScope handle_scope(args.GetIsolate()); if (i != 0) { printf(" "); } // Explicitly catch potential exceptions in toString(). v8::TryCatch try_catch(args.GetIsolate()); Handle<String> str_obj = args[i]->ToString(args.GetIsolate()); if (try_catch.HasCaught()) { try_catch.ReThrow(); return; } v8::String::Utf8Value str(str_obj); int n = static_cast<int>(fwrite(*str, sizeof(**str), str.length(), stdout)); if (n != str.length()) { printf("Error in fwrite\n"); Exit(1); } } } void Shell::Read(const v8::FunctionCallbackInfo<v8::Value>& args) { String::Utf8Value file(args[0]); if (*file == NULL) { Throw(args.GetIsolate(), "Error loading file"); return; } Handle<String> source = ReadFile(args.GetIsolate(), *file); if (source.IsEmpty()) { Throw(args.GetIsolate(), "Error loading file"); return; } args.GetReturnValue().Set(source); } Handle<String> Shell::ReadFromStdin(Isolate* isolate) { static const int kBufferSize = 256; char buffer[kBufferSize]; Handle<String> accumulator = String::NewFromUtf8(isolate, ""); int length; while (true) { // Continue reading if the line ends with an escape '\\' or the line has // not been fully read into the buffer yet (does not end with '\n'). // If fgets gets an error, just give up. char* input = NULL; input = fgets(buffer, kBufferSize, stdin); if (input == NULL) return Handle<String>(); length = static_cast<int>(strlen(buffer)); if (length == 0) { return accumulator; } else if (buffer[length-1] != '\n') { accumulator = String::Concat( accumulator, String::NewFromUtf8(isolate, buffer, String::kNormalString, length)); } else if (length > 1 && buffer[length-2] == '\\') { buffer[length-2] = '\n'; accumulator = String::Concat( accumulator, String::NewFromUtf8(isolate, buffer, String::kNormalString, length - 1)); } else { return String::Concat( accumulator, String::NewFromUtf8(isolate, buffer, String::kNormalString, length - 1)); } } } void Shell::Load(const v8::FunctionCallbackInfo<v8::Value>& args) { for (int i = 0; i < args.Length(); i++) { HandleScope handle_scope(args.GetIsolate()); String::Utf8Value file(args[i]); if (*file == NULL) { Throw(args.GetIsolate(), "Error loading file"); return; } Handle<String> source = ReadFile(args.GetIsolate(), *file); if (source.IsEmpty()) { Throw(args.GetIsolate(), "Error loading file"); return; } if (!ExecuteString(args.GetIsolate(), source, String::NewFromUtf8(args.GetIsolate(), *file), false, true)) { Throw(args.GetIsolate(), "Error executing file"); return; } } } void Shell::Quit(const v8::FunctionCallbackInfo<v8::Value>& args) { int exit_code = args[0]->Int32Value(); OnExit(args.GetIsolate()); exit(exit_code); } void Shell::Version(const v8::FunctionCallbackInfo<v8::Value>& args) { args.GetReturnValue().Set( String::NewFromUtf8(args.GetIsolate(), V8::GetVersion())); } void Shell::ReportException(Isolate* isolate, v8::TryCatch* try_catch) { HandleScope handle_scope(isolate); #ifndef V8_SHARED Handle<Context> utility_context; bool enter_context = !isolate->InContext(); if (enter_context) { utility_context = Local<Context>::New(isolate, utility_context_); utility_context->Enter(); } #endif // !V8_SHARED v8::String::Utf8Value exception(try_catch->Exception()); const char* exception_string = ToCString(exception); Handle<Message> message = try_catch->Message(); if (message.IsEmpty()) { // V8 didn't provide any extra information about this error; just // print the exception. printf("%s\n", exception_string); } else { // Print (filename):(line number): (message). v8::String::Utf8Value filename(message->GetScriptOrigin().ResourceName()); const char* filename_string = ToCString(filename); int linenum = message->GetLineNumber(); printf("%s:%i: %s\n", filename_string, linenum, exception_string); // Print line of source code. v8::String::Utf8Value sourceline(message->GetSourceLine()); const char* sourceline_string = ToCString(sourceline); printf("%s\n", sourceline_string); // Print wavy underline (GetUnderline is deprecated). int start = message->GetStartColumn(); for (int i = 0; i < start; i++) { printf(" "); } int end = message->GetEndColumn(); for (int i = start; i < end; i++) { printf("^"); } printf("\n"); v8::String::Utf8Value stack_trace(try_catch->StackTrace()); if (stack_trace.length() > 0) { const char* stack_trace_string = ToCString(stack_trace); printf("%s\n", stack_trace_string); } } printf("\n"); #ifndef V8_SHARED if (enter_context) utility_context->Exit(); #endif // !V8_SHARED } #ifndef V8_SHARED Handle<Array> Shell::GetCompletions(Isolate* isolate, Handle<String> text, Handle<String> full) { EscapableHandleScope handle_scope(isolate); v8::Local<v8::Context> utility_context = v8::Local<v8::Context>::New(isolate, utility_context_); v8::Context::Scope context_scope(utility_context); Handle<Object> global = utility_context->Global(); Local<Value> fun = global->Get(String::NewFromUtf8(isolate, "GetCompletions")); static const int kArgc = 3; v8::Local<v8::Context> evaluation_context = v8::Local<v8::Context>::New(isolate, evaluation_context_); Handle<Value> argv[kArgc] = { evaluation_context->Global(), text, full }; Local<Value> val = Local<Function>::Cast(fun)->Call(global, kArgc, argv); return handle_scope.Escape(Local<Array>::Cast(val)); } Local<Object> Shell::DebugMessageDetails(Isolate* isolate, Handle<String> message) { EscapableHandleScope handle_scope(isolate); v8::Local<v8::Context> context = v8::Local<v8::Context>::New(isolate, utility_context_); v8::Context::Scope context_scope(context); Handle<Object> global = context->Global(); Handle<Value> fun = global->Get(String::NewFromUtf8(isolate, "DebugMessageDetails")); static const int kArgc = 1; Handle<Value> argv[kArgc] = { message }; Handle<Value> val = Handle<Function>::Cast(fun)->Call(global, kArgc, argv); return handle_scope.Escape(Local<Object>(Handle<Object>::Cast(val))); } Local<Value> Shell::DebugCommandToJSONRequest(Isolate* isolate, Handle<String> command) { EscapableHandleScope handle_scope(isolate); v8::Local<v8::Context> context = v8::Local<v8::Context>::New(isolate, utility_context_); v8::Context::Scope context_scope(context); Handle<Object> global = context->Global(); Handle<Value> fun = global->Get(String::NewFromUtf8(isolate, "DebugCommandToJSONRequest")); static const int kArgc = 1; Handle<Value> argv[kArgc] = { command }; Handle<Value> val = Handle<Function>::Cast(fun)->Call(global, kArgc, argv); return handle_scope.Escape(Local<Value>(val)); } int32_t* Counter::Bind(const char* name, bool is_histogram) { int i; for (i = 0; i < kMaxNameSize - 1 && name[i]; i++) name_[i] = static_cast<char>(name[i]); name_[i] = '\0'; is_histogram_ = is_histogram; return ptr(); } void Counter::AddSample(int32_t sample) { count_++; sample_total_ += sample; } CounterCollection::CounterCollection() { magic_number_ = 0xDEADFACE; max_counters_ = kMaxCounters; max_name_size_ = Counter::kMaxNameSize; counters_in_use_ = 0; } Counter* CounterCollection::GetNextCounter() { if (counters_in_use_ == kMaxCounters) return NULL; return &counters_[counters_in_use_++]; } void Shell::MapCounters(v8::Isolate* isolate, const char* name) { counters_file_ = base::OS::MemoryMappedFile::create( name, sizeof(CounterCollection), &local_counters_); void* memory = (counters_file_ == NULL) ? NULL : counters_file_->memory(); if (memory == NULL) { printf("Could not map counters file %s\n", name); Exit(1); } counters_ = static_cast<CounterCollection*>(memory); isolate->SetCounterFunction(LookupCounter); isolate->SetCreateHistogramFunction(CreateHistogram); isolate->SetAddHistogramSampleFunction(AddHistogramSample); } int CounterMap::Hash(const char* name) { int h = 0; int c; while ((c = *name++) != 0) { h += h << 5; h += c; } return h; } Counter* Shell::GetCounter(const char* name, bool is_histogram) { Counter* counter = counter_map_->Lookup(name); if (counter == NULL) { counter = counters_->GetNextCounter(); if (counter != NULL) { counter_map_->Set(name, counter); counter->Bind(name, is_histogram); } } else { DCHECK(counter->is_histogram() == is_histogram); } return counter; } int* Shell::LookupCounter(const char* name) { Counter* counter = GetCounter(name, false); if (counter != NULL) { return counter->ptr(); } else { return NULL; } } void* Shell::CreateHistogram(const char* name, int min, int max, size_t buckets) { return GetCounter(name, true); } void Shell::AddHistogramSample(void* histogram, int sample) { Counter* counter = reinterpret_cast<Counter*>(histogram); counter->AddSample(sample); } class NoUseStrongForUtilityScriptScope { public: NoUseStrongForUtilityScriptScope() : flag_(i::FLAG_use_strong) { i::FLAG_use_strong = false; } ~NoUseStrongForUtilityScriptScope() { i::FLAG_use_strong = flag_; } private: bool flag_; }; void Shell::InstallUtilityScript(Isolate* isolate) { NoUseStrongForUtilityScriptScope no_use_strong; HandleScope scope(isolate); // If we use the utility context, we have to set the security tokens so that // utility, evaluation and debug context can all access each other. v8::Local<v8::Context> utility_context = v8::Local<v8::Context>::New(isolate, utility_context_); v8::Local<v8::Context> evaluation_context = v8::Local<v8::Context>::New(isolate, evaluation_context_); utility_context->SetSecurityToken(Undefined(isolate)); evaluation_context->SetSecurityToken(Undefined(isolate)); v8::Context::Scope context_scope(utility_context); if (i::FLAG_debugger) printf("JavaScript debugger enabled\n"); // Install the debugger object in the utility scope i::Debug* debug = reinterpret_cast<i::Isolate*>(isolate)->debug(); debug->Load(); i::Handle<i::Context> debug_context = debug->debug_context(); i::Handle<i::JSObject> js_debug = i::Handle<i::JSObject>(debug_context->global_object()); utility_context->Global()->Set(String::NewFromUtf8(isolate, "$debug"), Utils::ToLocal(js_debug)); debug_context->set_security_token( reinterpret_cast<i::Isolate*>(isolate)->heap()->undefined_value()); // Run the d8 shell utility script in the utility context int source_index = i::NativesCollection<i::D8>::GetIndex("d8"); i::Vector<const char> shell_source = i::NativesCollection<i::D8>::GetScriptSource(source_index); i::Vector<const char> shell_source_name = i::NativesCollection<i::D8>::GetScriptName(source_index); Handle<String> source = String::NewFromUtf8(isolate, shell_source.start(), String::kNormalString, shell_source.length()); Handle<String> name = String::NewFromUtf8(isolate, shell_source_name.start(), String::kNormalString, shell_source_name.length()); ScriptOrigin origin(name); Handle<Script> script = Script::Compile(source, &origin); script->Run(); // Mark the d8 shell script as native to avoid it showing up as normal source // in the debugger. i::Handle<i::Object> compiled_script = Utils::OpenHandle(*script); i::Handle<i::Script> script_object = compiled_script->IsJSFunction() ? i::Handle<i::Script>(i::Script::cast( i::JSFunction::cast(*compiled_script)->shared()->script())) : i::Handle<i::Script>(i::Script::cast( i::SharedFunctionInfo::cast(*compiled_script)->script())); script_object->set_type(i::Smi::FromInt(i::Script::TYPE_NATIVE)); // Start the in-process debugger if requested. if (i::FLAG_debugger) v8::Debug::SetDebugEventListener(HandleDebugEvent); } #endif // !V8_SHARED Handle<ObjectTemplate> Shell::CreateGlobalTemplate(Isolate* isolate) { Handle<ObjectTemplate> global_template = ObjectTemplate::New(isolate); global_template->Set(String::NewFromUtf8(isolate, "print"), FunctionTemplate::New(isolate, Print)); global_template->Set(String::NewFromUtf8(isolate, "write"), FunctionTemplate::New(isolate, Write)); global_template->Set(String::NewFromUtf8(isolate, "read"), FunctionTemplate::New(isolate, Read)); global_template->Set(String::NewFromUtf8(isolate, "readbuffer"), FunctionTemplate::New(isolate, ReadBuffer)); global_template->Set(String::NewFromUtf8(isolate, "readline"), FunctionTemplate::New(isolate, ReadLine)); global_template->Set(String::NewFromUtf8(isolate, "load"), FunctionTemplate::New(isolate, Load)); // Some Emscripten-generated code tries to call 'quit', which in turn would // call C's exit(). This would lead to memory leaks, because there is no way // we can terminate cleanly then, so we need a way to hide 'quit'. if (!options.omit_quit) { global_template->Set(String::NewFromUtf8(isolate, "quit"), FunctionTemplate::New(isolate, Quit)); } global_template->Set(String::NewFromUtf8(isolate, "version"), FunctionTemplate::New(isolate, Version)); // Bind the Realm object. Handle<ObjectTemplate> realm_template = ObjectTemplate::New(isolate); realm_template->Set(String::NewFromUtf8(isolate, "current"), FunctionTemplate::New(isolate, RealmCurrent)); realm_template->Set(String::NewFromUtf8(isolate, "owner"), FunctionTemplate::New(isolate, RealmOwner)); realm_template->Set(String::NewFromUtf8(isolate, "global"), FunctionTemplate::New(isolate, RealmGlobal)); realm_template->Set(String::NewFromUtf8(isolate, "create"), FunctionTemplate::New(isolate, RealmCreate)); realm_template->Set(String::NewFromUtf8(isolate, "dispose"), FunctionTemplate::New(isolate, RealmDispose)); realm_template->Set(String::NewFromUtf8(isolate, "switch"), FunctionTemplate::New(isolate, RealmSwitch)); realm_template->Set(String::NewFromUtf8(isolate, "eval"), FunctionTemplate::New(isolate, RealmEval)); realm_template->SetAccessor(String::NewFromUtf8(isolate, "shared"), RealmSharedGet, RealmSharedSet); global_template->Set(String::NewFromUtf8(isolate, "Realm"), realm_template); #ifndef V8_SHARED Handle<ObjectTemplate> performance_template = ObjectTemplate::New(isolate); performance_template->Set(String::NewFromUtf8(isolate, "now"), FunctionTemplate::New(isolate, PerformanceNow)); global_template->Set(String::NewFromUtf8(isolate, "performance"), performance_template); #endif // !V8_SHARED Handle<ObjectTemplate> os_templ = ObjectTemplate::New(isolate); AddOSMethods(isolate, os_templ); global_template->Set(String::NewFromUtf8(isolate, "os"), os_templ); return global_template; } void Shell::Initialize(Isolate* isolate) { #ifndef V8_SHARED // Set up counters if (i::StrLength(i::FLAG_map_counters) != 0) MapCounters(isolate, i::FLAG_map_counters); #endif // !V8_SHARED } void Shell::InitializeDebugger(Isolate* isolate) { if (options.test_shell) return; #ifndef V8_SHARED HandleScope scope(isolate); Handle<ObjectTemplate> global_template = CreateGlobalTemplate(isolate); utility_context_.Reset(isolate, Context::New(isolate, NULL, global_template)); if (utility_context_.IsEmpty()) { printf("Failed to initialize debugger\n"); Shell::Exit(1); } #endif // !V8_SHARED } Local<Context> Shell::CreateEvaluationContext(Isolate* isolate) { #ifndef V8_SHARED // This needs to be a critical section since this is not thread-safe base::LockGuard<base::Mutex> lock_guard(&context_mutex_); #endif // !V8_SHARED // Initialize the global objects Handle<ObjectTemplate> global_template = CreateGlobalTemplate(isolate); EscapableHandleScope handle_scope(isolate); Local<Context> context = Context::New(isolate, NULL, global_template); DCHECK(!context.IsEmpty()); Context::Scope scope(context); #ifndef V8_SHARED i::Factory* factory = reinterpret_cast<i::Isolate*>(isolate)->factory(); i::JSArguments js_args = i::FLAG_js_arguments; i::Handle<i::FixedArray> arguments_array = factory->NewFixedArray(js_args.argc); for (int j = 0; j < js_args.argc; j++) { i::Handle<i::String> arg = factory->NewStringFromUtf8(i::CStrVector(js_args[j])).ToHandleChecked(); arguments_array->set(j, *arg); } i::Handle<i::JSArray> arguments_jsarray = factory->NewJSArrayWithElements(arguments_array); context->Global()->Set(String::NewFromUtf8(isolate, "arguments"), Utils::ToLocal(arguments_jsarray)); #endif // !V8_SHARED return handle_scope.Escape(context); } void Shell::Exit(int exit_code) { // Use _exit instead of exit to avoid races between isolate // threads and static destructors. fflush(stdout); fflush(stderr); _exit(exit_code); } #ifndef V8_SHARED struct CounterAndKey { Counter* counter; const char* key; }; inline bool operator<(const CounterAndKey& lhs, const CounterAndKey& rhs) { return strcmp(lhs.key, rhs.key) < 0; } #endif // !V8_SHARED void Shell::OnExit(v8::Isolate* isolate) { LineEditor* line_editor = LineEditor::Get(); if (line_editor) line_editor->Close(); #ifndef V8_SHARED reinterpret_cast<i::Isolate*>(isolate)->DumpAndResetCompilationStats(); if (i::FLAG_dump_counters) { int number_of_counters = 0; for (CounterMap::Iterator i(counter_map_); i.More(); i.Next()) { number_of_counters++; } CounterAndKey* counters = new CounterAndKey[number_of_counters]; int j = 0; for (CounterMap::Iterator i(counter_map_); i.More(); i.Next(), j++) { counters[j].counter = i.CurrentValue(); counters[j].key = i.CurrentKey(); } std::sort(counters, counters + number_of_counters); printf("+----------------------------------------------------------------+" "-------------+\n"); printf("| Name |" " Value |\n"); printf("+----------------------------------------------------------------+" "-------------+\n"); for (j = 0; j < number_of_counters; j++) { Counter* counter = counters[j].counter; const char* key = counters[j].key; if (counter->is_histogram()) { printf("| c:%-60s | %11i |\n", key, counter->count()); printf("| t:%-60s | %11i |\n", key, counter->sample_total()); } else { printf("| %-62s | %11i |\n", key, counter->count()); } } printf("+----------------------------------------------------------------+" "-------------+\n"); delete [] counters; } delete counters_file_; delete counter_map_; #endif // !V8_SHARED } static FILE* FOpen(const char* path, const char* mode) { #if defined(_MSC_VER) && (defined(_WIN32) || defined(_WIN64)) FILE* result; if (fopen_s(&result, path, mode) == 0) { return result; } else { return NULL; } #else FILE* file = fopen(path, mode); if (file == NULL) return NULL; struct stat file_stat; if (fstat(fileno(file), &file_stat) != 0) return NULL; bool is_regular_file = ((file_stat.st_mode & S_IFREG) != 0); if (is_regular_file) return file; fclose(file); return NULL; #endif } static char* ReadChars(Isolate* isolate, const char* name, int* size_out) { FILE* file = FOpen(name, "rb"); if (file == NULL) return NULL; fseek(file, 0, SEEK_END); size_t size = ftell(file); rewind(file); char* chars = new char[size + 1]; chars[size] = '\0'; for (size_t i = 0; i < size;) { i += fread(&chars[i], 1, size - i, file); if (ferror(file)) { fclose(file); delete[] chars; return nullptr; } } fclose(file); *size_out = static_cast<int>(size); return chars; } struct DataAndPersistent { uint8_t* data; int byte_length; Global<ArrayBuffer> handle; }; static void ReadBufferWeakCallback( const v8::WeakCallbackInfo<DataAndPersistent>& data) { int byte_length = data.GetParameter()->byte_length; data.GetIsolate()->AdjustAmountOfExternalAllocatedMemory( -static_cast<intptr_t>(byte_length)); delete[] data.GetParameter()->data; data.GetParameter()->handle.Reset(); delete data.GetParameter(); } void Shell::ReadBuffer(const v8::FunctionCallbackInfo<v8::Value>& args) { DCHECK(sizeof(char) == sizeof(uint8_t)); // NOLINT String::Utf8Value filename(args[0]); int length; if (*filename == NULL) { Throw(args.GetIsolate(), "Error loading file"); return; } Isolate* isolate = args.GetIsolate(); DataAndPersistent* data = new DataAndPersistent; data->data = reinterpret_cast<uint8_t*>( ReadChars(args.GetIsolate(), *filename, &length)); if (data->data == NULL) { delete data; Throw(args.GetIsolate(), "Error reading file"); return; } data->byte_length = length; Handle<v8::ArrayBuffer> buffer = ArrayBuffer::New(isolate, data->data, length); data->handle.Reset(isolate, buffer); data->handle.SetWeak(data, ReadBufferWeakCallback, v8::WeakCallbackType::kParameter); data->handle.MarkIndependent(); isolate->AdjustAmountOfExternalAllocatedMemory(length); args.GetReturnValue().Set(buffer); } // Reads a file into a v8 string. Handle<String> Shell::ReadFile(Isolate* isolate, const char* name) { int size = 0; char* chars = ReadChars(isolate, name, &size); if (chars == NULL) return Handle<String>(); Handle<String> result = String::NewFromUtf8(isolate, chars, String::kNormalString, size); delete[] chars; return result; } void Shell::RunShell(Isolate* isolate) { HandleScope outer_scope(isolate); v8::Local<v8::Context> context = v8::Local<v8::Context>::New(isolate, evaluation_context_); v8::Context::Scope context_scope(context); PerIsolateData::RealmScope realm_scope(PerIsolateData::Get(isolate)); Handle<String> name = String::NewFromUtf8(isolate, "(d8)"); LineEditor* console = LineEditor::Get(); printf("V8 version %s [console: %s]\n", V8::GetVersion(), console->name()); console->Open(isolate); while (true) { HandleScope inner_scope(isolate); Handle<String> input = console->Prompt(Shell::kPrompt); if (input.IsEmpty()) break; ExecuteString(isolate, input, name, true, true); } printf("\n"); } SourceGroup::~SourceGroup() { #ifndef V8_SHARED delete thread_; thread_ = NULL; #endif // !V8_SHARED } void SourceGroup::Execute(Isolate* isolate) { bool exception_was_thrown = false; for (int i = begin_offset_; i < end_offset_; ++i) { const char* arg = argv_[i]; Shell::SourceType source_type = Shell::SCRIPT; if (strcmp(arg, "-e") == 0 && i + 1 < end_offset_) { // Execute argument given to -e option directly. HandleScope handle_scope(isolate); Handle<String> file_name = String::NewFromUtf8(isolate, "unnamed"); Handle<String> source = String::NewFromUtf8(isolate, argv_[i + 1]); if (!Shell::ExecuteString(isolate, source, file_name, false, true)) { exception_was_thrown = true; break; } ++i; continue; } else if (strcmp(arg, "--module") == 0 && i + 1 < end_offset_) { // Treat the next file as a module. source_type = Shell::MODULE; arg = argv_[++i]; } else if (arg[0] == '-') { // Ignore other options. They have been parsed already. continue; } // Use all other arguments as names of files to load and run. HandleScope handle_scope(isolate); Handle<String> file_name = String::NewFromUtf8(isolate, arg); Handle<String> source = ReadFile(isolate, arg); if (source.IsEmpty()) { printf("Error reading '%s'\n", arg); Shell::Exit(1); } if (!Shell::ExecuteString(isolate, source, file_name, false, true, source_type)) { exception_was_thrown = true; break; } } if (exception_was_thrown != Shell::options.expected_to_throw) { Shell::Exit(1); } } Handle<String> SourceGroup::ReadFile(Isolate* isolate, const char* name) { int size; char* chars = ReadChars(isolate, name, &size); if (chars == NULL) return Handle<String>(); Handle<String> result = String::NewFromUtf8(isolate, chars, String::kNormalString, size); delete[] chars; return result; } #ifndef V8_SHARED base::Thread::Options SourceGroup::GetThreadOptions() { // On some systems (OSX 10.6) the stack size default is 0.5Mb or less // which is not enough to parse the big literal expressions used in tests. // The stack size should be at least StackGuard::kLimitSize + some // OS-specific padding for thread startup code. 2Mbytes seems to be enough. return base::Thread::Options("IsolateThread", 2 * MB); } void SourceGroup::ExecuteInThread() { ShellArrayBufferAllocator allocator; Isolate::CreateParams create_params; create_params.array_buffer_allocator = &allocator; Isolate* isolate = Isolate::New(create_params); do { next_semaphore_.Wait(); { Isolate::Scope iscope(isolate); { HandleScope scope(isolate); PerIsolateData data(isolate); Local<Context> context = Shell::CreateEvaluationContext(isolate); { Context::Scope cscope(context); PerIsolateData::RealmScope realm_scope(PerIsolateData::Get(isolate)); Execute(isolate); } } Shell::CollectGarbage(isolate); } done_semaphore_.Signal(); } while (!Shell::options.last_run); isolate->Dispose(); } void SourceGroup::StartExecuteInThread() { if (thread_ == NULL) { thread_ = new IsolateThread(this); thread_->Start(); } next_semaphore_.Signal(); } void SourceGroup::WaitForThread() { if (thread_ == NULL) return; if (Shell::options.last_run) { thread_->Join(); } else { done_semaphore_.Wait(); } } #endif // !V8_SHARED void SetFlagsFromString(const char* flags) { v8::V8::SetFlagsFromString(flags, static_cast<int>(strlen(flags))); } bool Shell::SetOptions(int argc, char* argv[]) { bool logfile_per_isolate = false; for (int i = 0; i < argc; i++) { if (strcmp(argv[i], "--stress-opt") == 0) { options.stress_opt = true; argv[i] = NULL; } else if (strcmp(argv[i], "--nostress-opt") == 0) { options.stress_opt = false; argv[i] = NULL; } else if (strcmp(argv[i], "--stress-deopt") == 0) { options.stress_deopt = true; argv[i] = NULL; } else if (strcmp(argv[i], "--mock-arraybuffer-allocator") == 0) { options.mock_arraybuffer_allocator = true; argv[i] = NULL; } else if (strcmp(argv[i], "--noalways-opt") == 0) { // No support for stressing if we can't use --always-opt. options.stress_opt = false; options.stress_deopt = false; } else if (strcmp(argv[i], "--logfile-per-isolate") == 0) { logfile_per_isolate = true; argv[i] = NULL; } else if (strcmp(argv[i], "--shell") == 0) { options.interactive_shell = true; argv[i] = NULL; } else if (strcmp(argv[i], "--test") == 0) { options.test_shell = true; argv[i] = NULL; } else if (strcmp(argv[i], "--notest") == 0 || strcmp(argv[i], "--no-test") == 0) { options.test_shell = false; argv[i] = NULL; } else if (strcmp(argv[i], "--send-idle-notification") == 0) { options.send_idle_notification = true; argv[i] = NULL; } else if (strcmp(argv[i], "--invoke-weak-callbacks") == 0) { options.invoke_weak_callbacks = true; // TODO(jochen) See issue 3351 options.send_idle_notification = true; argv[i] = NULL; } else if (strcmp(argv[i], "--omit-quit") == 0) { options.omit_quit = true; argv[i] = NULL; } else if (strcmp(argv[i], "-f") == 0) { // Ignore any -f flags for compatibility with other stand-alone // JavaScript engines. continue; } else if (strcmp(argv[i], "--isolate") == 0) { #ifdef V8_SHARED printf("D8 with shared library does not support multi-threading\n"); return false; #endif // V8_SHARED options.num_isolates++; } else if (strcmp(argv[i], "--dump-heap-constants") == 0) { #ifdef V8_SHARED printf("D8 with shared library does not support constant dumping\n"); return false; #else options.dump_heap_constants = true; argv[i] = NULL; #endif // V8_SHARED } else if (strcmp(argv[i], "--throws") == 0) { options.expected_to_throw = true; argv[i] = NULL; } else if (strncmp(argv[i], "--icu-data-file=", 16) == 0) { options.icu_data_file = argv[i] + 16; argv[i] = NULL; #ifdef V8_SHARED } else if (strcmp(argv[i], "--dump-counters") == 0) { printf("D8 with shared library does not include counters\n"); return false; } else if (strcmp(argv[i], "--debugger") == 0) { printf("Javascript debugger not included\n"); return false; #endif // V8_SHARED #ifdef V8_USE_EXTERNAL_STARTUP_DATA } else if (strncmp(argv[i], "--natives_blob=", 15) == 0) { options.natives_blob = argv[i] + 15; argv[i] = NULL; } else if (strncmp(argv[i], "--snapshot_blob=", 16) == 0) { options.snapshot_blob = argv[i] + 16; argv[i] = NULL; #endif // V8_USE_EXTERNAL_STARTUP_DATA } else if (strcmp(argv[i], "--cache") == 0 || strncmp(argv[i], "--cache=", 8) == 0) { const char* value = argv[i] + 7; if (!*value || strncmp(value, "=code", 6) == 0) { options.compile_options = v8::ScriptCompiler::kProduceCodeCache; } else if (strncmp(value, "=parse", 7) == 0) { options.compile_options = v8::ScriptCompiler::kProduceParserCache; } else if (strncmp(value, "=none", 6) == 0) { options.compile_options = v8::ScriptCompiler::kNoCompileOptions; } else { printf("Unknown option to --cache.\n"); return false; } argv[i] = NULL; } } v8::V8::SetFlagsFromCommandLine(&argc, argv, true); bool enable_harmony_modules = false; // Set up isolated source groups. options.isolate_sources = new SourceGroup[options.num_isolates]; SourceGroup* current = options.isolate_sources; current->Begin(argv, 1); for (int i = 1; i < argc; i++) { const char* str = argv[i]; if (strcmp(str, "--isolate") == 0) { current->End(i); current++; current->Begin(argv, i + 1); } else if (strcmp(str, "--module") == 0) { // Pass on to SourceGroup, which understands this option. enable_harmony_modules = true; } else if (strncmp(argv[i], "--", 2) == 0) { printf("Warning: unknown flag %s.\nTry --help for options\n", argv[i]); } } current->End(argc); if (!logfile_per_isolate && options.num_isolates) { SetFlagsFromString("--nologfile_per_isolate"); } if (enable_harmony_modules) { SetFlagsFromString("--harmony-modules"); } return true; } int Shell::RunMain(Isolate* isolate, int argc, char* argv[]) { #ifndef V8_SHARED for (int i = 1; i < options.num_isolates; ++i) { options.isolate_sources[i].StartExecuteInThread(); } #endif // !V8_SHARED { HandleScope scope(isolate); Local<Context> context = CreateEvaluationContext(isolate); if (options.last_run && options.use_interactive_shell()) { // Keep using the same context in the interactive shell. evaluation_context_.Reset(isolate, context); #ifndef V8_SHARED // If the interactive debugger is enabled make sure to activate // it before running the files passed on the command line. if (i::FLAG_debugger) { InstallUtilityScript(isolate); } #endif // !V8_SHARED } { Context::Scope cscope(context); PerIsolateData::RealmScope realm_scope(PerIsolateData::Get(isolate)); options.isolate_sources[0].Execute(isolate); } } CollectGarbage(isolate); #ifndef V8_SHARED for (int i = 1; i < options.num_isolates; ++i) { options.isolate_sources[i].WaitForThread(); } #endif // !V8_SHARED return 0; } void Shell::CollectGarbage(Isolate* isolate) { if (options.send_idle_notification) { const double kLongIdlePauseInSeconds = 1.0; isolate->ContextDisposedNotification(); isolate->IdleNotificationDeadline( g_platform->MonotonicallyIncreasingTime() + kLongIdlePauseInSeconds); } if (options.invoke_weak_callbacks) { // By sending a low memory notifications, we will try hard to collect all // garbage and will therefore also invoke all weak callbacks of actually // unreachable persistent handles. isolate->LowMemoryNotification(); } } #ifndef V8_SHARED static void DumpHeapConstants(i::Isolate* isolate) { i::Heap* heap = isolate->heap(); // Dump the INSTANCE_TYPES table to the console. printf("# List of known V8 instance types.\n"); #define DUMP_TYPE(T) printf(" %d: \"%s\",\n", i::T, #T); printf("INSTANCE_TYPES = {\n"); INSTANCE_TYPE_LIST(DUMP_TYPE) printf("}\n"); #undef DUMP_TYPE // Dump the KNOWN_MAP table to the console. printf("\n# List of known V8 maps.\n"); #define ROOT_LIST_CASE(type, name, camel_name) \ if (n == NULL && o == heap->name()) n = #camel_name; #define STRUCT_LIST_CASE(upper_name, camel_name, name) \ if (n == NULL && o == heap->name##_map()) n = #camel_name "Map"; i::HeapObjectIterator it(heap->map_space()); printf("KNOWN_MAPS = {\n"); for (i::Object* o = it.Next(); o != NULL; o = it.Next()) { i::Map* m = i::Map::cast(o); const char* n = NULL; intptr_t p = reinterpret_cast<intptr_t>(m) & 0xfffff; int t = m->instance_type(); ROOT_LIST(ROOT_LIST_CASE) STRUCT_LIST(STRUCT_LIST_CASE) if (n == NULL) continue; printf(" 0x%05" V8PRIxPTR ": (%d, \"%s\"),\n", p, t, n); } printf("}\n"); #undef STRUCT_LIST_CASE #undef ROOT_LIST_CASE // Dump the KNOWN_OBJECTS table to the console. printf("\n# List of known V8 objects.\n"); #define ROOT_LIST_CASE(type, name, camel_name) \ if (n == NULL && o == heap->name()) n = #camel_name; i::OldSpaces spit(heap); printf("KNOWN_OBJECTS = {\n"); for (i::PagedSpace* s = spit.next(); s != NULL; s = spit.next()) { i::HeapObjectIterator it(s); const char* sname = AllocationSpaceName(s->identity()); for (i::Object* o = it.Next(); o != NULL; o = it.Next()) { const char* n = NULL; intptr_t p = reinterpret_cast<intptr_t>(o) & 0xfffff; ROOT_LIST(ROOT_LIST_CASE) if (n == NULL) continue; printf(" (\"%s\", 0x%05" V8PRIxPTR "): \"%s\",\n", sname, p, n); } } printf("}\n"); #undef ROOT_LIST_CASE } #endif // !V8_SHARED int Shell::Main(int argc, char* argv[]) { #if (defined(_WIN32) || defined(_WIN64)) UINT new_flags = SEM_FAILCRITICALERRORS | SEM_NOGPFAULTERRORBOX | SEM_NOOPENFILEERRORBOX; UINT existing_flags = SetErrorMode(new_flags); SetErrorMode(existing_flags | new_flags); #if defined(_MSC_VER) _CrtSetReportMode(_CRT_WARN, _CRTDBG_MODE_DEBUG | _CRTDBG_MODE_FILE); _CrtSetReportFile(_CRT_WARN, _CRTDBG_FILE_STDERR); _CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_DEBUG | _CRTDBG_MODE_FILE); _CrtSetReportFile(_CRT_ASSERT, _CRTDBG_FILE_STDERR); _CrtSetReportMode(_CRT_ERROR, _CRTDBG_MODE_DEBUG | _CRTDBG_MODE_FILE); _CrtSetReportFile(_CRT_ERROR, _CRTDBG_FILE_STDERR); _set_error_mode(_OUT_TO_STDERR); #endif // defined(_MSC_VER) #endif // defined(_WIN32) || defined(_WIN64) if (!SetOptions(argc, argv)) return 1; v8::V8::InitializeICU(options.icu_data_file); g_platform = v8::platform::CreateDefaultPlatform(); v8::V8::InitializePlatform(g_platform); v8::V8::Initialize(); #ifdef V8_USE_EXTERNAL_STARTUP_DATA v8::StartupDataHandler startup_data(argv[0], options.natives_blob, options.snapshot_blob); #endif SetFlagsFromString("--trace-hydrogen-file=hydrogen.cfg"); SetFlagsFromString("--trace-turbo-cfg-file=turbo.cfg"); SetFlagsFromString("--redirect-code-traces-to=code.asm"); int result = 0; Isolate::CreateParams create_params; ShellArrayBufferAllocator array_buffer_allocator; MockArrayBufferAllocator mock_arraybuffer_allocator; if (options.mock_arraybuffer_allocator) { create_params.array_buffer_allocator = &mock_arraybuffer_allocator; } else { create_params.array_buffer_allocator = &array_buffer_allocator; } #if !defined(V8_SHARED) && defined(ENABLE_GDB_JIT_INTERFACE) if (i::FLAG_gdbjit) { create_params.code_event_handler = i::GDBJITInterface::EventHandler; } #endif #ifdef ENABLE_VTUNE_JIT_INTERFACE create_params.code_event_handler = vTune::GetVtuneCodeEventHandler(); #endif #ifndef V8_SHARED create_params.constraints.ConfigureDefaults( base::SysInfo::AmountOfPhysicalMemory(), base::SysInfo::AmountOfVirtualMemory()); Shell::counter_map_ = new CounterMap(); if (i::FLAG_dump_counters || i::FLAG_track_gc_object_stats) { create_params.counter_lookup_callback = LookupCounter; create_params.create_histogram_callback = CreateHistogram; create_params.add_histogram_sample_callback = AddHistogramSample; } #endif Isolate* isolate = Isolate::New(create_params); DumbLineEditor dumb_line_editor(isolate); { Isolate::Scope scope(isolate); Initialize(isolate); PerIsolateData data(isolate); InitializeDebugger(isolate); #ifndef V8_SHARED if (options.dump_heap_constants) { DumpHeapConstants(reinterpret_cast<i::Isolate*>(isolate)); return 0; } #endif if (options.stress_opt || options.stress_deopt) { Testing::SetStressRunType(options.stress_opt ? Testing::kStressTypeOpt : Testing::kStressTypeDeopt); int stress_runs = Testing::GetStressRuns(); for (int i = 0; i < stress_runs && result == 0; i++) { printf("============ Stress %d/%d ============\n", i + 1, stress_runs); Testing::PrepareStressRun(i); options.last_run = (i == stress_runs - 1); result = RunMain(isolate, argc, argv); } printf("======== Full Deoptimization =======\n"); Testing::DeoptimizeAll(); #if !defined(V8_SHARED) } else if (i::FLAG_stress_runs > 0) { int stress_runs = i::FLAG_stress_runs; for (int i = 0; i < stress_runs && result == 0; i++) { printf("============ Run %d/%d ============\n", i + 1, stress_runs); options.last_run = (i == stress_runs - 1); result = RunMain(isolate, argc, argv); } #endif } else { result = RunMain(isolate, argc, argv); } // Run interactive shell if explicitly requested or if no script has been // executed, but never on --test if (options.use_interactive_shell()) { #ifndef V8_SHARED if (!i::FLAG_debugger) { InstallUtilityScript(isolate); } #endif // !V8_SHARED RunShell(isolate); } // Shut down contexts and collect garbage. evaluation_context_.Reset(); #ifndef V8_SHARED utility_context_.Reset(); #endif // !V8_SHARED CollectGarbage(isolate); } OnExit(isolate); #ifndef V8_SHARED // Dump basic block profiling data. if (i::BasicBlockProfiler* profiler = reinterpret_cast<i::Isolate*>(isolate)->basic_block_profiler()) { i::OFStream os(stdout); os << *profiler; } #endif // !V8_SHARED isolate->Dispose(); V8::Dispose(); V8::ShutdownPlatform(); delete g_platform; return result; } } // namespace v8 #ifndef GOOGLE3 int main(int argc, char* argv[]) { return v8::Shell::Main(argc, argv); } #endif