// Copyright 2012 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifdef USING_V8_SHARED // Defined when linking against shared lib on Windows.
#define V8_SHARED
#endif
#ifdef COMPRESS_STARTUP_DATA_BZ2
#include <bzlib.h>
#endif
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#ifdef V8_SHARED
#include <assert.h>
#include "../include/v8-testing.h"
#endif // V8_SHARED
#include "d8.h"
#ifndef V8_SHARED
#include "api.h"
#include "checks.h"
#include "d8-debug.h"
#include "debug.h"
#include "natives.h"
#include "platform.h"
#include "v8.h"
#endif // V8_SHARED
#if !defined(_WIN32) && !defined(_WIN64)
#include <unistd.h> // NOLINT
#endif
#ifndef ASSERT
#define ASSERT(condition) assert(condition)
#endif
namespace v8 {
LineEditor *LineEditor::first_ = NULL;
LineEditor::LineEditor(Type type, const char* name)
: type_(type),
name_(name),
next_(first_) {
first_ = this;
}
LineEditor* LineEditor::Get() {
LineEditor* current = first_;
LineEditor* best = current;
while (current != NULL) {
if (current->type_ > best->type_)
best = current;
current = current->next_;
}
return best;
}
class DumbLineEditor: public LineEditor {
public:
DumbLineEditor() : LineEditor(LineEditor::DUMB, "dumb") { }
virtual Handle<String> Prompt(const char* prompt);
};
static DumbLineEditor dumb_line_editor;
Handle<String> DumbLineEditor::Prompt(const char* prompt) {
printf("%s", prompt);
return Shell::ReadFromStdin();
}
#ifndef V8_SHARED
CounterMap* Shell::counter_map_;
i::OS::MemoryMappedFile* Shell::counters_file_ = NULL;
CounterCollection Shell::local_counters_;
CounterCollection* Shell::counters_ = &local_counters_;
i::Mutex* Shell::context_mutex_(i::OS::CreateMutex());
Persistent<Context> Shell::utility_context_;
#endif // V8_SHARED
LineEditor* Shell::console = NULL;
Persistent<Context> Shell::evaluation_context_;
ShellOptions Shell::options;
const char* Shell::kPrompt = "d8> ";
const int MB = 1024 * 1024;
#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>";
}
// Executes a string within the current v8 context.
bool Shell::ExecuteString(Handle<String> source,
Handle<Value> name,
bool print_result,
bool report_exceptions) {
#if !defined(V8_SHARED) && defined(ENABLE_DEBUGGER_SUPPORT)
bool FLAG_debugger = i::FLAG_debugger;
#else
bool FLAG_debugger = false;
#endif // !V8_SHARED && ENABLE_DEBUGGER_SUPPORT
HandleScope handle_scope;
TryCatch try_catch;
options.script_executed = true;
if (FLAG_debugger) {
// When debugging make exceptions appear to be uncaught.
try_catch.SetVerbose(true);
}
Handle<Script> script = Script::Compile(source, name);
if (script.IsEmpty()) {
// Print errors that happened during compilation.
if (report_exceptions && !FLAG_debugger)
ReportException(&try_catch);
return false;
} else {
Handle<Value> result = script->Run();
if (result.IsEmpty()) {
ASSERT(try_catch.HasCaught());
// Print errors that happened during execution.
if (report_exceptions && !FLAG_debugger)
ReportException(&try_catch);
return false;
} else {
ASSERT(!try_catch.HasCaught());
if (print_result && !result->IsUndefined()) {
// If all went well and the result wasn't undefined then print
// the returned value.
v8::String::Utf8Value str(result);
size_t count = fwrite(*str, sizeof(**str), str.length(), stdout);
(void) count; // Silence GCC-4.5.x "unused result" warning.
printf("\n");
}
return true;
}
}
}
Handle<Value> Shell::Print(const Arguments& args) {
Handle<Value> val = Write(args);
printf("\n");
fflush(stdout);
return val;
}
Handle<Value> Shell::Write(const Arguments& args) {
for (int i = 0; i < args.Length(); i++) {
HandleScope handle_scope;
if (i != 0) {
printf(" ");
}
v8::String::Utf8Value str(args[i]);
int n = static_cast<int>(fwrite(*str, sizeof(**str), str.length(), stdout));
if (n != str.length()) {
printf("Error in fwrite\n");
Exit(1);
}
}
return Undefined();
}
Handle<Value> Shell::EnableProfiler(const Arguments& args) {
V8::ResumeProfiler();
return Undefined();
}
Handle<Value> Shell::DisableProfiler(const Arguments& args) {
V8::PauseProfiler();
return Undefined();
}
Handle<Value> Shell::Read(const Arguments& args) {
String::Utf8Value file(args[0]);
if (*file == NULL) {
return ThrowException(String::New("Error loading file"));
}
Handle<String> source = ReadFile(*file);
if (source.IsEmpty()) {
return ThrowException(String::New("Error loading file"));
}
return source;
}
Handle<String> Shell::ReadFromStdin() {
static const int kBufferSize = 256;
char buffer[kBufferSize];
Handle<String> accumulator = String::New("");
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;
{ // Release lock for blocking input.
Unlocker unlock(Isolate::GetCurrent());
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::New(buffer, length));
} else if (length > 1 && buffer[length-2] == '\\') {
buffer[length-2] = '\n';
accumulator = String::Concat(accumulator, String::New(buffer, length-1));
} else {
return String::Concat(accumulator, String::New(buffer, length-1));
}
}
}
Handle<Value> Shell::Load(const Arguments& args) {
for (int i = 0; i < args.Length(); i++) {
HandleScope handle_scope;
String::Utf8Value file(args[i]);
if (*file == NULL) {
return ThrowException(String::New("Error loading file"));
}
Handle<String> source = ReadFile(*file);
if (source.IsEmpty()) {
return ThrowException(String::New("Error loading file"));
}
if (!ExecuteString(source, String::New(*file), false, true)) {
return ThrowException(String::New("Error executing file"));
}
}
return Undefined();
}
static size_t convertToUint(Local<Value> value_in, TryCatch* try_catch) {
if (value_in->IsUint32()) {
return value_in->Uint32Value();
}
Local<Value> number = value_in->ToNumber();
if (try_catch->HasCaught()) return 0;
ASSERT(number->IsNumber());
Local<Int32> int32 = number->ToInt32();
if (try_catch->HasCaught() || int32.IsEmpty()) return 0;
int32_t raw_value = int32->Int32Value();
if (try_catch->HasCaught()) return 0;
if (raw_value < 0) {
ThrowException(String::New("Array length must not be negative."));
return 0;
}
static const int kMaxLength = 0x3fffffff;
#ifndef V8_SHARED
ASSERT(kMaxLength == i::ExternalArray::kMaxLength);
#endif // V8_SHARED
if (raw_value > static_cast<int32_t>(kMaxLength)) {
ThrowException(
String::New("Array length exceeds maximum length."));
}
return static_cast<size_t>(raw_value);
}
const char kArrayBufferReferencePropName[] = "_is_array_buffer_";
const char kArrayBufferMarkerPropName[] = "_array_buffer_ref_";
Handle<Value> Shell::CreateExternalArray(const Arguments& args,
ExternalArrayType type,
size_t element_size) {
TryCatch try_catch;
bool is_array_buffer_construct = element_size == 0;
if (is_array_buffer_construct) {
type = v8::kExternalByteArray;
element_size = 1;
}
ASSERT(element_size == 1 || element_size == 2 || element_size == 4 ||
element_size == 8);
if (args.Length() == 0) {
return ThrowException(
String::New("Array constructor must have at least one "
"parameter."));
}
bool first_arg_is_array_buffer =
args[0]->IsObject() &&
args[0]->ToObject()->Get(
String::New(kArrayBufferMarkerPropName))->IsTrue();
// Currently, only the following constructors are supported:
// TypedArray(unsigned long length)
// TypedArray(ArrayBuffer buffer,
// optional unsigned long byteOffset,
// optional unsigned long length)
if (args.Length() > 3) {
return ThrowException(
String::New("Array constructor from ArrayBuffer must "
"have 1-3 parameters."));
}
Local<Value> length_value = (args.Length() < 3)
? (first_arg_is_array_buffer
? args[0]->ToObject()->Get(String::New("length"))
: args[0])
: args[2];
size_t length = convertToUint(length_value, &try_catch);
if (try_catch.HasCaught()) return try_catch.Exception();
void* data = NULL;
size_t offset = 0;
Handle<Object> array = Object::New();
if (first_arg_is_array_buffer) {
Handle<Object> derived_from = args[0]->ToObject();
data = derived_from->GetIndexedPropertiesExternalArrayData();
size_t array_buffer_length = convertToUint(
derived_from->Get(String::New("length")),
&try_catch);
if (try_catch.HasCaught()) return try_catch.Exception();
if (data == NULL && array_buffer_length != 0) {
return ThrowException(
String::New("ArrayBuffer doesn't have data"));
}
if (args.Length() > 1) {
offset = convertToUint(args[1], &try_catch);
if (try_catch.HasCaught()) return try_catch.Exception();
// The given byteOffset must be a multiple of the element size of the
// specific type, otherwise an exception is raised.
if (offset % element_size != 0) {
return ThrowException(
String::New("offset must be multiple of element_size"));
}
}
if (offset > array_buffer_length) {
return ThrowException(
String::New("byteOffset must be less than ArrayBuffer length."));
}
if (args.Length() == 2) {
// If length is not explicitly specified, the length of the ArrayBuffer
// minus the byteOffset must be a multiple of the element size of the
// specific type, or an exception is raised.
length = array_buffer_length - offset;
}
if (args.Length() != 3) {
if (length % element_size != 0) {
return ThrowException(
String::New("ArrayBuffer length minus the byteOffset must be a "
"multiple of the element size"));
}
length /= element_size;
}
// If a given byteOffset and length references an area beyond the end of
// the ArrayBuffer an exception is raised.
if (offset + (length * element_size) > array_buffer_length) {
return ThrowException(
String::New("length references an area beyond the end of the "
"ArrayBuffer"));
}
// Hold a reference to the ArrayBuffer so its buffer doesn't get collected.
array->Set(String::New(kArrayBufferReferencePropName), args[0], ReadOnly);
}
if (is_array_buffer_construct) {
array->Set(String::New(kArrayBufferMarkerPropName), True(), ReadOnly);
}
Persistent<Object> persistent_array = Persistent<Object>::New(array);
persistent_array.MakeWeak(data, ExternalArrayWeakCallback);
persistent_array.MarkIndependent();
if (data == NULL && length != 0) {
data = calloc(length, element_size);
if (data == NULL) {
return ThrowException(String::New("Memory allocation failed."));
}
}
array->SetIndexedPropertiesToExternalArrayData(
reinterpret_cast<uint8_t*>(data) + offset, type,
static_cast<int>(length));
array->Set(String::New("length"),
Int32::New(static_cast<int32_t>(length)), ReadOnly);
array->Set(String::New("BYTES_PER_ELEMENT"),
Int32::New(static_cast<int32_t>(element_size)));
return array;
}
void Shell::ExternalArrayWeakCallback(Persistent<Value> object, void* data) {
HandleScope scope;
Handle<String> prop_name = String::New(kArrayBufferReferencePropName);
Handle<Object> converted_object = object->ToObject();
Local<Value> prop_value = converted_object->Get(prop_name);
if (data != NULL && !prop_value->IsObject()) {
free(data);
}
object.Dispose();
}
Handle<Value> Shell::ArrayBuffer(const Arguments& args) {
return CreateExternalArray(args, v8::kExternalByteArray, 0);
}
Handle<Value> Shell::Int8Array(const Arguments& args) {
return CreateExternalArray(args, v8::kExternalByteArray, sizeof(int8_t));
}
Handle<Value> Shell::Uint8Array(const Arguments& args) {
return CreateExternalArray(args, kExternalUnsignedByteArray, sizeof(uint8_t));
}
Handle<Value> Shell::Int16Array(const Arguments& args) {
return CreateExternalArray(args, kExternalShortArray, sizeof(int16_t));
}
Handle<Value> Shell::Uint16Array(const Arguments& args) {
return CreateExternalArray(args, kExternalUnsignedShortArray,
sizeof(uint16_t));
}
Handle<Value> Shell::Int32Array(const Arguments& args) {
return CreateExternalArray(args, kExternalIntArray, sizeof(int32_t));
}
Handle<Value> Shell::Uint32Array(const Arguments& args) {
return CreateExternalArray(args, kExternalUnsignedIntArray, sizeof(uint32_t));
}
Handle<Value> Shell::Float32Array(const Arguments& args) {
return CreateExternalArray(args, kExternalFloatArray,
sizeof(float)); // NOLINT
}
Handle<Value> Shell::Float64Array(const Arguments& args) {
return CreateExternalArray(args, kExternalDoubleArray,
sizeof(double)); // NOLINT
}
Handle<Value> Shell::PixelArray(const Arguments& args) {
return CreateExternalArray(args, kExternalPixelArray, sizeof(uint8_t));
}
Handle<Value> Shell::Yield(const Arguments& args) {
v8::Unlocker unlocker;
return Undefined();
}
Handle<Value> Shell::Quit(const Arguments& args) {
int exit_code = args[0]->Int32Value();
#ifndef V8_SHARED
OnExit();
#endif // V8_SHARED
exit(exit_code);
return Undefined();
}
Handle<Value> Shell::Version(const Arguments& args) {
return String::New(V8::GetVersion());
}
void Shell::ReportException(v8::TryCatch* try_catch) {
HandleScope handle_scope;
#if !defined(V8_SHARED) && defined(ENABLE_DEBUGGER_SUPPORT)
bool enter_context = !Context::InContext();
if (enter_context) utility_context_->Enter();
#endif // !V8_SHARED && ENABLE_DEBUGGER_SUPPORT
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->GetScriptResourceName());
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");
#if !defined(V8_SHARED) && defined(ENABLE_DEBUGGER_SUPPORT)
if (enter_context) utility_context_->Exit();
#endif // !V8_SHARED && ENABLE_DEBUGGER_SUPPORT
}
#ifndef V8_SHARED
Handle<Array> Shell::GetCompletions(Handle<String> text, Handle<String> full) {
HandleScope handle_scope;
Context::Scope context_scope(utility_context_);
Handle<Object> global = utility_context_->Global();
Handle<Value> fun = global->Get(String::New("GetCompletions"));
static const int kArgc = 3;
Handle<Value> argv[kArgc] = { evaluation_context_->Global(), text, full };
Handle<Value> val = Handle<Function>::Cast(fun)->Call(global, kArgc, argv);
return handle_scope.Close(Handle<Array>::Cast(val));
}
#ifdef ENABLE_DEBUGGER_SUPPORT
Handle<Object> Shell::DebugMessageDetails(Handle<String> message) {
Context::Scope context_scope(utility_context_);
Handle<Object> global = utility_context_->Global();
Handle<Value> fun = global->Get(String::New("DebugMessageDetails"));
static const int kArgc = 1;
Handle<Value> argv[kArgc] = { message };
Handle<Value> val = Handle<Function>::Cast(fun)->Call(global, kArgc, argv);
return Handle<Object>::Cast(val);
}
Handle<Value> Shell::DebugCommandToJSONRequest(Handle<String> command) {
Context::Scope context_scope(utility_context_);
Handle<Object> global = utility_context_->Global();
Handle<Value> fun = global->Get(String::New("DebugCommandToJSONRequest"));
static const int kArgc = 1;
Handle<Value> argv[kArgc] = { command };
Handle<Value> val = Handle<Function>::Cast(fun)->Call(global, kArgc, argv);
return val;
}
void Shell::DispatchDebugMessages() {
v8::Context::Scope scope(Shell::evaluation_context_);
v8::Debug::ProcessDebugMessages();
}
#endif // ENABLE_DEBUGGER_SUPPORT
#endif // V8_SHARED
#ifndef V8_SHARED
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(const char* name) {
counters_file_ = i::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);
V8::SetCounterFunction(LookupCounter);
V8::SetCreateHistogramFunction(CreateHistogram);
V8::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 {
ASSERT(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);
}
void Shell::InstallUtilityScript() {
Locker lock;
HandleScope scope;
// 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.
utility_context_->SetSecurityToken(Undefined());
evaluation_context_->SetSecurityToken(Undefined());
Context::Scope utility_scope(utility_context_);
#ifdef ENABLE_DEBUGGER_SUPPORT
if (i::FLAG_debugger) printf("JavaScript debugger enabled\n");
// Install the debugger object in the utility scope
i::Debug* debug = i::Isolate::Current()->debug();
debug->Load();
i::Handle<i::JSObject> js_debug
= i::Handle<i::JSObject>(debug->debug_context()->global());
utility_context_->Global()->Set(String::New("$debug"),
Utils::ToLocal(js_debug));
debug->debug_context()->set_security_token(HEAP->undefined_value());
#endif // ENABLE_DEBUGGER_SUPPORT
// 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>::GetRawScriptSource(source_index);
i::Vector<const char> shell_source_name =
i::NativesCollection<i::D8>::GetScriptName(source_index);
Handle<String> source = String::New(shell_source.start(),
shell_source.length());
Handle<String> name = String::New(shell_source_name.start(),
shell_source_name.length());
Handle<Script> script = Script::Compile(source, name);
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));
#ifdef ENABLE_DEBUGGER_SUPPORT
// Start the in-process debugger if requested.
if (i::FLAG_debugger && !i::FLAG_debugger_agent) {
v8::Debug::SetDebugEventListener(HandleDebugEvent);
}
#endif // ENABLE_DEBUGGER_SUPPORT
}
#endif // V8_SHARED
#ifdef COMPRESS_STARTUP_DATA_BZ2
class BZip2Decompressor : public v8::StartupDataDecompressor {
public:
virtual ~BZip2Decompressor() { }
protected:
virtual int DecompressData(char* raw_data,
int* raw_data_size,
const char* compressed_data,
int compressed_data_size) {
ASSERT_EQ(v8::StartupData::kBZip2,
v8::V8::GetCompressedStartupDataAlgorithm());
unsigned int decompressed_size = *raw_data_size;
int result =
BZ2_bzBuffToBuffDecompress(raw_data,
&decompressed_size,
const_cast<char*>(compressed_data),
compressed_data_size,
0, 1);
if (result == BZ_OK) {
*raw_data_size = decompressed_size;
}
return result;
}
};
#endif
Handle<ObjectTemplate> Shell::CreateGlobalTemplate() {
Handle<ObjectTemplate> global_template = ObjectTemplate::New();
global_template->Set(String::New("print"), FunctionTemplate::New(Print));
global_template->Set(String::New("write"), FunctionTemplate::New(Write));
global_template->Set(String::New("read"), FunctionTemplate::New(Read));
global_template->Set(String::New("readbinary"),
FunctionTemplate::New(ReadBinary));
global_template->Set(String::New("readline"),
FunctionTemplate::New(ReadLine));
global_template->Set(String::New("load"), FunctionTemplate::New(Load));
global_template->Set(String::New("quit"), FunctionTemplate::New(Quit));
global_template->Set(String::New("version"), FunctionTemplate::New(Version));
global_template->Set(String::New("enableProfiler"),
FunctionTemplate::New(EnableProfiler));
global_template->Set(String::New("disableProfiler"),
FunctionTemplate::New(DisableProfiler));
// Bind the handlers for external arrays.
global_template->Set(String::New("ArrayBuffer"),
FunctionTemplate::New(ArrayBuffer));
global_template->Set(String::New("Int8Array"),
FunctionTemplate::New(Int8Array));
global_template->Set(String::New("Uint8Array"),
FunctionTemplate::New(Uint8Array));
global_template->Set(String::New("Int16Array"),
FunctionTemplate::New(Int16Array));
global_template->Set(String::New("Uint16Array"),
FunctionTemplate::New(Uint16Array));
global_template->Set(String::New("Int32Array"),
FunctionTemplate::New(Int32Array));
global_template->Set(String::New("Uint32Array"),
FunctionTemplate::New(Uint32Array));
global_template->Set(String::New("Float32Array"),
FunctionTemplate::New(Float32Array));
global_template->Set(String::New("Float64Array"),
FunctionTemplate::New(Float64Array));
global_template->Set(String::New("PixelArray"),
FunctionTemplate::New(PixelArray));
#ifdef LIVE_OBJECT_LIST
global_template->Set(String::New("lol_is_enabled"), True());
#else
global_template->Set(String::New("lol_is_enabled"), False());
#endif
#if !defined(V8_SHARED) && !defined(_WIN32) && !defined(_WIN64)
Handle<ObjectTemplate> os_templ = ObjectTemplate::New();
AddOSMethods(os_templ);
global_template->Set(String::New("os"), os_templ);
#endif // V8_SHARED
return global_template;
}
void Shell::Initialize() {
#ifdef COMPRESS_STARTUP_DATA_BZ2
BZip2Decompressor startup_data_decompressor;
int bz2_result = startup_data_decompressor.Decompress();
if (bz2_result != BZ_OK) {
fprintf(stderr, "bzip error code: %d\n", bz2_result);
Exit(1);
}
#endif
#ifndef V8_SHARED
Shell::counter_map_ = new CounterMap();
// Set up counters
if (i::StrLength(i::FLAG_map_counters) != 0)
MapCounters(i::FLAG_map_counters);
if (i::FLAG_dump_counters) {
V8::SetCounterFunction(LookupCounter);
V8::SetCreateHistogramFunction(CreateHistogram);
V8::SetAddHistogramSampleFunction(AddHistogramSample);
}
#endif // V8_SHARED
if (options.test_shell) return;
#ifndef V8_SHARED
Locker lock;
HandleScope scope;
Handle<ObjectTemplate> global_template = CreateGlobalTemplate();
utility_context_ = Context::New(NULL, global_template);
#ifdef ENABLE_DEBUGGER_SUPPORT
// Start the debugger agent if requested.
if (i::FLAG_debugger_agent) {
v8::Debug::EnableAgent("d8 shell", i::FLAG_debugger_port, true);
v8::Debug::SetDebugMessageDispatchHandler(DispatchDebugMessages, true);
}
#endif // ENABLE_DEBUGGER_SUPPORT
#endif // V8_SHARED
}
Persistent<Context> Shell::CreateEvaluationContext() {
#ifndef V8_SHARED
// This needs to be a critical section since this is not thread-safe
i::ScopedLock lock(context_mutex_);
#endif // V8_SHARED
// Initialize the global objects
Handle<ObjectTemplate> global_template = CreateGlobalTemplate();
Persistent<Context> context = Context::New(NULL, global_template);
ASSERT(!context.IsEmpty());
Context::Scope scope(context);
#ifndef V8_SHARED
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]));
arguments_array->set(j, *arg);
}
i::Handle<i::JSArray> arguments_jsarray =
FACTORY->NewJSArrayWithElements(arguments_array);
context->Global()->Set(String::New("arguments"),
Utils::ToLocal(arguments_jsarray));
#endif // V8_SHARED
return 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;
};
int CompareKeys(const void* a, const void* b) {
return strcmp(static_cast<const CounterAndKey*>(a)->key,
static_cast<const CounterAndKey*>(b)->key);
}
void Shell::OnExit() {
if (console != NULL) console->Close();
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();
}
qsort(counters, number_of_counters, sizeof(counters[0]), CompareKeys);
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:%-40s | %11i |\n", key, counter->count());
printf("| t:%-40s | %11i |\n", key, counter->sample_total());
} else {
printf("| %-42s | %11i |\n", key, counter->count());
}
}
printf("+--------------------------------------------+-------------+\n");
delete [] counters;
}
if (counters_file_ != NULL)
delete counters_file_;
}
#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(const char* name, int* size_out) {
// Release the V8 lock while reading files.
v8::Unlocker unlocker(Isolate::GetCurrent());
FILE* file = FOpen(name, "rb");
if (file == NULL) return NULL;
fseek(file, 0, SEEK_END);
int size = ftell(file);
rewind(file);
char* chars = new char[size + 1];
chars[size] = '\0';
for (int i = 0; i < size;) {
int read = static_cast<int>(fread(&chars[i], 1, size - i, file));
i += read;
}
fclose(file);
*size_out = size;
return chars;
}
Handle<Value> Shell::ReadBinary(const Arguments& args) {
String::Utf8Value filename(args[0]);
int size;
if (*filename == NULL) {
return ThrowException(String::New("Error loading file"));
}
char* chars = ReadChars(*filename, &size);
if (chars == NULL) {
return ThrowException(String::New("Error reading file"));
}
// We skip checking the string for UTF8 characters and use it raw as
// backing store for the external string with 8-bit characters.
BinaryResource* resource = new BinaryResource(chars, size);
return String::NewExternal(resource);
}
#ifndef V8_SHARED
static char* ReadToken(char* data, char token) {
char* next = i::OS::StrChr(data, token);
if (next != NULL) {
*next = '\0';
return (next + 1);
}
return NULL;
}
static char* ReadLine(char* data) {
return ReadToken(data, '\n');
}
static char* ReadWord(char* data) {
return ReadToken(data, ' ');
}
#endif // V8_SHARED
// Reads a file into a v8 string.
Handle<String> Shell::ReadFile(const char* name) {
int size = 0;
char* chars = ReadChars(name, &size);
if (chars == NULL) return Handle<String>();
Handle<String> result = String::New(chars);
delete[] chars;
return result;
}
void Shell::RunShell() {
Locker locker;
Context::Scope context_scope(evaluation_context_);
HandleScope outer_scope;
Handle<String> name = String::New("(d8)");
console = LineEditor::Get();
printf("V8 version %s [console: %s]\n", V8::GetVersion(), console->name());
console->Open();
while (true) {
HandleScope inner_scope;
Handle<String> input = console->Prompt(Shell::kPrompt);
if (input.IsEmpty()) break;
ExecuteString(input, name, true, true);
}
printf("\n");
}
#ifndef V8_SHARED
class ShellThread : public i::Thread {
public:
// Takes ownership of the underlying char array of |files|.
ShellThread(int no, char* files)
: Thread("d8:ShellThread"),
no_(no), files_(files) { }
~ShellThread() {
delete[] files_;
}
virtual void Run();
private:
int no_;
char* files_;
};
void ShellThread::Run() {
char* ptr = files_;
while ((ptr != NULL) && (*ptr != '\0')) {
// For each newline-separated line.
char* next_line = ReadLine(ptr);
if (*ptr == '#') {
// Skip comment lines.
ptr = next_line;
continue;
}
// Prepare the context for this thread.
Locker locker;
HandleScope outer_scope;
Persistent<Context> thread_context = Shell::CreateEvaluationContext();
Context::Scope context_scope(thread_context);
while ((ptr != NULL) && (*ptr != '\0')) {
HandleScope inner_scope;
char* filename = ptr;
ptr = ReadWord(ptr);
// Skip empty strings.
if (strlen(filename) == 0) {
continue;
}
Handle<String> str = Shell::ReadFile(filename);
if (str.IsEmpty()) {
printf("File '%s' not found\n", filename);
Shell::Exit(1);
}
Shell::ExecuteString(str, String::New(filename), false, false);
}
thread_context.Dispose();
ptr = next_line;
}
}
#endif // V8_SHARED
SourceGroup::~SourceGroup() {
#ifndef V8_SHARED
delete next_semaphore_;
next_semaphore_ = NULL;
delete done_semaphore_;
done_semaphore_ = NULL;
delete thread_;
thread_ = NULL;
#endif // V8_SHARED
}
void SourceGroup::Execute() {
for (int i = begin_offset_; i < end_offset_; ++i) {
const char* arg = argv_[i];
if (strcmp(arg, "-e") == 0 && i + 1 < end_offset_) {
// Execute argument given to -e option directly.
HandleScope handle_scope;
Handle<String> file_name = String::New("unnamed");
Handle<String> source = String::New(argv_[i + 1]);
if (!Shell::ExecuteString(source, file_name, false, true)) {
Shell::Exit(1);
}
++i;
} else if (arg[0] == '-') {
// Ignore other options. They have been parsed already.
} else {
// Use all other arguments as names of files to load and run.
HandleScope handle_scope;
Handle<String> file_name = String::New(arg);
Handle<String> source = ReadFile(arg);
if (source.IsEmpty()) {
printf("Error reading '%s'\n", arg);
Shell::Exit(1);
}
if (!Shell::ExecuteString(source, file_name, false, true)) {
Shell::Exit(1);
}
}
}
}
Handle<String> SourceGroup::ReadFile(const char* name) {
int size;
const char* chars = ReadChars(name, &size);
if (chars == NULL) return Handle<String>();
Handle<String> result = String::New(chars, size);
delete[] chars;
return result;
}
#ifndef V8_SHARED
i::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 i::Thread::Options("IsolateThread", 2 * MB);
}
void SourceGroup::ExecuteInThread() {
Isolate* isolate = Isolate::New();
do {
if (next_semaphore_ != NULL) next_semaphore_->Wait();
{
Isolate::Scope iscope(isolate);
Locker lock(isolate);
HandleScope scope;
Persistent<Context> context = Shell::CreateEvaluationContext();
{
Context::Scope cscope(context);
Execute();
}
context.Dispose();
}
if (done_semaphore_ != NULL) 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
bool Shell::SetOptions(int argc, char* argv[]) {
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], "--stress-deopt") == 0) {
options.stress_deopt = 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], "--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], "--preemption") == 0) {
#ifdef V8_SHARED
printf("D8 with shared library does not support multi-threading\n");
return false;
#else
options.use_preemption = true;
argv[i] = NULL;
#endif // V8_SHARED
} else if (strcmp(argv[i], "--nopreemption") == 0) {
#ifdef V8_SHARED
printf("D8 with shared library does not support multi-threading\n");
return false;
#else
options.use_preemption = false;
argv[i] = NULL;
#endif // V8_SHARED
} else if (strcmp(argv[i], "--preemption-interval") == 0) {
#ifdef V8_SHARED
printf("D8 with shared library does not support multi-threading\n");
return false;
#else
if (++i < argc) {
argv[i-1] = NULL;
char* end = NULL;
options.preemption_interval = strtol(argv[i], &end, 10); // NOLINT
if (options.preemption_interval <= 0
|| *end != '\0'
|| errno == ERANGE) {
printf("Invalid value for --preemption-interval '%s'\n", argv[i]);
return false;
}
argv[i] = NULL;
} else {
printf("Missing value for --preemption-interval\n");
return false;
}
#endif // V8_SHARED
} 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], "-p") == 0) {
#ifdef V8_SHARED
printf("D8 with shared library does not support multi-threading\n");
return false;
#else
options.num_parallel_files++;
#endif // V8_SHARED
}
#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
}
#ifndef V8_SHARED
// Run parallel threads if we are not using --isolate
options.parallel_files = new char*[options.num_parallel_files];
int parallel_files_set = 0;
for (int i = 1; i < argc; i++) {
if (argv[i] == NULL) continue;
if (strcmp(argv[i], "-p") == 0 && i + 1 < argc) {
if (options.num_isolates > 1) {
printf("-p is not compatible with --isolate\n");
return false;
}
argv[i] = NULL;
i++;
options.parallel_files[parallel_files_set] = argv[i];
parallel_files_set++;
argv[i] = NULL;
}
}
if (parallel_files_set != options.num_parallel_files) {
printf("-p requires a file containing a list of files as parameter\n");
return false;
}
#endif // V8_SHARED
v8::V8::SetFlagsFromCommandLine(&argc, argv, true);
// 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 (strncmp(argv[i], "--", 2) == 0) {
printf("Warning: unknown flag %s.\nTry --help for options\n", argv[i]);
}
}
current->End(argc);
return true;
}
int Shell::RunMain(int argc, char* argv[]) {
#ifndef V8_SHARED
i::List<i::Thread*> threads(1);
if (options.parallel_files != NULL) {
for (int i = 0; i < options.num_parallel_files; i++) {
char* files = NULL;
{ Locker lock(Isolate::GetCurrent());
int size = 0;
files = ReadChars(options.parallel_files[i], &size);
}
if (files == NULL) {
printf("File list '%s' not found\n", options.parallel_files[i]);
Exit(1);
}
ShellThread* thread = new ShellThread(threads.length(), files);
thread->Start();
threads.Add(thread);
}
}
for (int i = 1; i < options.num_isolates; ++i) {
options.isolate_sources[i].StartExecuteInThread();
}
#endif // V8_SHARED
{ // NOLINT
Locker lock;
HandleScope scope;
Persistent<Context> context = CreateEvaluationContext();
if (options.last_run) {
// Keep using the same context in the interactive shell.
evaluation_context_ = context;
#if !defined(V8_SHARED) && defined(ENABLE_DEBUGGER_SUPPORT)
// 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();
}
#endif // !V8_SHARED && ENABLE_DEBUGGER_SUPPORT
}
{
Context::Scope cscope(context);
options.isolate_sources[0].Execute();
}
if (!options.last_run) {
context.Dispose();
#if !defined(V8_SHARED)
if (i::FLAG_send_idle_notification) {
const int kLongIdlePauseInMs = 1000;
V8::ContextDisposedNotification();
V8::IdleNotification(kLongIdlePauseInMs);
}
#endif // !V8_SHARED
}
#ifndef V8_SHARED
// Start preemption if threads have been created and preemption is enabled.
if (threads.length() > 0
&& options.use_preemption) {
Locker::StartPreemption(options.preemption_interval);
}
#endif // V8_SHARED
}
#ifndef V8_SHARED
for (int i = 1; i < options.num_isolates; ++i) {
options.isolate_sources[i].WaitForThread();
}
for (int i = 0; i < threads.length(); i++) {
i::Thread* thread = threads[i];
thread->Join();
delete thread;
}
if (threads.length() > 0 && options.use_preemption) {
Locker lock;
Locker::StopPreemption();
}
#endif // V8_SHARED
return 0;
}
int Shell::Main(int argc, char* argv[]) {
if (!SetOptions(argc, argv)) return 1;
Initialize();
int result = 0;
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(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(argc, argv);
}
#endif
} else {
result = RunMain(argc, argv);
}
#if !defined(V8_SHARED) && defined(ENABLE_DEBUGGER_SUPPORT)
// Run remote debugger if requested, but never on --test
if (i::FLAG_remote_debugger && !options.test_shell) {
InstallUtilityScript();
RunRemoteDebugger(i::FLAG_debugger_port);
return 0;
}
#endif // !V8_SHARED && ENABLE_DEBUGGER_SUPPORT
// Run interactive shell if explicitly requested or if no script has been
// executed, but never on --test
if (( options.interactive_shell
|| !options.script_executed )
&& !options.test_shell ) {
#if !defined(V8_SHARED) && defined(ENABLE_DEBUGGER_SUPPORT)
if (!i::FLAG_debugger) {
InstallUtilityScript();
}
#endif // !V8_SHARED && ENABLE_DEBUGGER_SUPPORT
RunShell();
}
V8::Dispose();
#ifndef V8_SHARED
OnExit();
#endif // V8_SHARED
return result;
}
} // namespace v8
#ifndef GOOGLE3
int main(int argc, char* argv[]) {
return v8::Shell::Main(argc, argv);
}
#endif