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/*
* Copyright (C) 1999-2000 Harri Porten ([email protected])
* Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
* Copyright (C) 2006 Bjoern Graf ([email protected])
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "config.h"
#include "BytecodeGenerator.h"
#include "Completion.h"
#include <wtf/CurrentTime.h>
#include "ExceptionHelpers.h"
#include "InitializeThreading.h"
#include "Interpreter.h"
#include "JSArray.h"
#include "JSCTypedArrayStubs.h"
#include "JSFunction.h"
#include "JSLock.h"
#include "JSString.h"
#include <wtf/MainThread.h>
#include "SamplingTool.h"
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if !OS(WINDOWS)
#include <unistd.h>
#endif
#if HAVE(READLINE)
// readline/history.h has a Function typedef which conflicts with the WTF::Function template from WTF/Forward.h
// We #define it to something else to avoid this conflict.
#define Function ReadlineFunction
#include <readline/history.h>
#include <readline/readline.h>
#undef Function
#endif
#if HAVE(SYS_TIME_H)
#include <sys/time.h>
#endif
#if HAVE(SIGNAL_H)
#include <signal.h>
#endif
#if COMPILER(MSVC) && !OS(WINCE)
#include <crtdbg.h>
#include <mmsystem.h>
#include <windows.h>
#endif
#if PLATFORM(QT)
#include <QCoreApplication>
#include <QDateTime>
#endif
#if PLATFORM(IOS)
#include <fenv.h>
#include <arm/arch.h>
#endif
using namespace JSC;
using namespace WTF;
static bool fillBufferWithContentsOfFile(const UString& fileName, Vector<char>& buffer);
static EncodedJSValue JSC_HOST_CALL functionPrint(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionDebug(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionJSCStack(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionGC(ExecState*);
#ifndef NDEBUG
static EncodedJSValue JSC_HOST_CALL functionReleaseExecutableMemory(ExecState*);
#endif
static EncodedJSValue JSC_HOST_CALL functionVersion(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionRun(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionLoad(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionCheckSyntax(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionReadline(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionPreciseTime(ExecState*);
static NO_RETURN_WITH_VALUE EncodedJSValue JSC_HOST_CALL functionQuit(ExecState*);
#if ENABLE(SAMPLING_FLAGS)
static EncodedJSValue JSC_HOST_CALL functionSetSamplingFlags(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionClearSamplingFlags(ExecState*);
#endif
struct Script {
bool isFile;
char* argument;
Script(bool isFile, char *argument)
: isFile(isFile)
, argument(argument)
{
}
};
struct CommandLine {
CommandLine()
: interactive(false)
, dump(false)
{
}
bool interactive;
bool dump;
Vector<Script> scripts;
Vector<UString> arguments;
};
static const char interactivePrompt[] = "> ";
class StopWatch {
public:
void start();
void stop();
long getElapsedMS(); // call stop() first
private:
double m_startTime;
double m_stopTime;
};
void StopWatch::start()
{
m_startTime = currentTime();
}
void StopWatch::stop()
{
m_stopTime = currentTime();
}
long StopWatch::getElapsedMS()
{
return static_cast<long>((m_stopTime - m_startTime) * 1000);
}
class GlobalObject : public JSGlobalObject {
private:
GlobalObject(JSGlobalData&, Structure*);
public:
typedef JSGlobalObject Base;
static GlobalObject* create(JSGlobalData& globalData, Structure* structure, const Vector<UString>& arguments)
{
GlobalObject* object = new (NotNull, allocateCell<GlobalObject>(globalData.heap)) GlobalObject(globalData, structure);
object->finishCreation(globalData, arguments);
return object;
}
static const ClassInfo s_info;
static Structure* createStructure(JSGlobalData& globalData, JSValue prototype)
{
return Structure::create(globalData, 0, prototype, TypeInfo(GlobalObjectType, StructureFlags), &s_info);
}
protected:
void finishCreation(JSGlobalData& globalData, const Vector<UString>& arguments)
{
Base::finishCreation(globalData);
addFunction(globalData, "debug", functionDebug, 1);
addFunction(globalData, "print", functionPrint, 1);
addFunction(globalData, "quit", functionQuit, 0);
addFunction(globalData, "gc", functionGC, 0);
#ifndef NDEBUG
addFunction(globalData, "releaseExecutableMemory", functionReleaseExecutableMemory, 0);
#endif
addFunction(globalData, "version", functionVersion, 1);
addFunction(globalData, "run", functionRun, 1);
addFunction(globalData, "load", functionLoad, 1);
addFunction(globalData, "checkSyntax", functionCheckSyntax, 1);
addFunction(globalData, "jscStack", functionJSCStack, 1);
addFunction(globalData, "readline", functionReadline, 0);
addFunction(globalData, "preciseTime", functionPreciseTime, 0);
#if ENABLE(SAMPLING_FLAGS)
addFunction(globalData, "setSamplingFlags", functionSetSamplingFlags, 1);
addFunction(globalData, "clearSamplingFlags", functionClearSamplingFlags, 1);
#endif
addConstructableFunction(globalData, "Uint8Array", constructJSUint8Array, 1);
addConstructableFunction(globalData, "Uint8ClampedArray", constructJSUint8ClampedArray, 1);
addConstructableFunction(globalData, "Uint16Array", constructJSUint16Array, 1);
addConstructableFunction(globalData, "Uint32Array", constructJSUint32Array, 1);
addConstructableFunction(globalData, "Int8Array", constructJSInt8Array, 1);
addConstructableFunction(globalData, "Int16Array", constructJSInt16Array, 1);
addConstructableFunction(globalData, "Int32Array", constructJSInt32Array, 1);
addConstructableFunction(globalData, "Float32Array", constructJSFloat32Array, 1);
addConstructableFunction(globalData, "Float64Array", constructJSFloat64Array, 1);
JSArray* array = constructEmptyArray(globalExec());
for (size_t i = 0; i < arguments.size(); ++i)
array->putDirectIndex(globalExec(), i, jsString(globalExec(), arguments[i]), false);
putDirect(globalData, Identifier(globalExec(), "arguments"), array);
}
void addFunction(JSGlobalData& globalData, const char* name, NativeFunction function, unsigned arguments)
{
Identifier identifier(globalExec(), name);
putDirect(globalData, identifier, JSFunction::create(globalExec(), this, arguments, identifier, function));
}
void addConstructableFunction(JSGlobalData& globalData, const char* name, NativeFunction function, unsigned arguments)
{
Identifier identifier(globalExec(), name);
putDirect(globalData, identifier, JSFunction::create(globalExec(), this, arguments, identifier, function, NoIntrinsic, function));
}
};
COMPILE_ASSERT(!IsInteger<GlobalObject>::value, WTF_IsInteger_GlobalObject_false);
ASSERT_CLASS_FITS_IN_CELL(GlobalObject);
const ClassInfo GlobalObject::s_info = { "global", &JSGlobalObject::s_info, 0, ExecState::globalObjectTable, CREATE_METHOD_TABLE(GlobalObject) };
GlobalObject::GlobalObject(JSGlobalData& globalData, Structure* structure)
: JSGlobalObject(globalData, structure)
{
}
static inline SourceCode jscSource(const char* utf8, const UString& filename)
{
// Find the the first non-ascii character, or nul.
const char* pos = utf8;
while (*pos > 0)
pos++;
size_t asciiLength = pos - utf8;
// Fast case - string is all ascii.
if (!*pos)
return makeSource(UString(utf8, asciiLength), filename);
// Slow case - contains non-ascii characters, use fromUTF8WithLatin1Fallback.
ASSERT(*pos < 0);
ASSERT(strlen(utf8) == asciiLength + strlen(pos));
String source = String::fromUTF8WithLatin1Fallback(utf8, asciiLength + strlen(pos));
return makeSource(source.impl(), filename);
}
EncodedJSValue JSC_HOST_CALL functionPrint(ExecState* exec)
{
for (unsigned i = 0; i < exec->argumentCount(); ++i) {
if (i)
putchar(' ');
printf("%s", exec->argument(i).toString(exec)->value(exec).utf8().data());
}
putchar('\n');
fflush(stdout);
return JSValue::encode(jsUndefined());
}
EncodedJSValue JSC_HOST_CALL functionDebug(ExecState* exec)
{
fprintf(stderr, "--> %s\n", exec->argument(0).toString(exec)->value(exec).utf8().data());
return JSValue::encode(jsUndefined());
}
EncodedJSValue JSC_HOST_CALL functionJSCStack(ExecState* exec)
{
String trace = "--> Stack trace:\n";
Vector<StackFrame> stackTrace;
Interpreter::getStackTrace(&exec->globalData(), stackTrace);
int i = 0;
for (Vector<StackFrame>::iterator iter = stackTrace.begin(); iter < stackTrace.end(); iter++) {
StackFrame level = *iter;
trace += String::format(" %i %s\n", i, level.toString(exec).utf8().data());
i++;
}
fprintf(stderr, "%s", trace.utf8().data());
return JSValue::encode(jsUndefined());
}
EncodedJSValue JSC_HOST_CALL functionGC(ExecState* exec)
{
JSLockHolder lock(exec);
exec->heap()->collectAllGarbage();
return JSValue::encode(jsUndefined());
}
#ifndef NDEBUG
EncodedJSValue JSC_HOST_CALL functionReleaseExecutableMemory(ExecState* exec)
{
JSLockHolder lock(exec);
exec->globalData().releaseExecutableMemory();
return JSValue::encode(jsUndefined());
}
#endif
EncodedJSValue JSC_HOST_CALL functionVersion(ExecState*)
{
// We need this function for compatibility with the Mozilla JS tests but for now
// we don't actually do any version-specific handling
return JSValue::encode(jsUndefined());
}
EncodedJSValue JSC_HOST_CALL functionRun(ExecState* exec)
{
UString fileName = exec->argument(0).toString(exec)->value(exec);
Vector<char> script;
if (!fillBufferWithContentsOfFile(fileName, script))
return JSValue::encode(throwError(exec, createError(exec, "Could not open file.")));
GlobalObject* globalObject = GlobalObject::create(exec->globalData(), GlobalObject::createStructure(exec->globalData(), jsNull()), Vector<UString>());
JSValue exception;
StopWatch stopWatch;
stopWatch.start();
evaluate(globalObject->globalExec(), globalObject->globalScopeChain(), jscSource(script.data(), fileName), JSValue(), &exception);
stopWatch.stop();
if (!!exception) {
throwError(globalObject->globalExec(), exception);
return JSValue::encode(jsUndefined());
}
return JSValue::encode(jsNumber(stopWatch.getElapsedMS()));
}
EncodedJSValue JSC_HOST_CALL functionLoad(ExecState* exec)
{
UString fileName = exec->argument(0).toString(exec)->value(exec);
Vector<char> script;
if (!fillBufferWithContentsOfFile(fileName, script))
return JSValue::encode(throwError(exec, createError(exec, "Could not open file.")));
JSGlobalObject* globalObject = exec->lexicalGlobalObject();
JSValue evaluationException;
JSValue result = evaluate(globalObject->globalExec(), globalObject->globalScopeChain(), jscSource(script.data(), fileName), JSValue(), &evaluationException);
if (evaluationException)
throwError(exec, evaluationException);
return JSValue::encode(result);
}
EncodedJSValue JSC_HOST_CALL functionCheckSyntax(ExecState* exec)
{
UString fileName = exec->argument(0).toString(exec)->value(exec);
Vector<char> script;
if (!fillBufferWithContentsOfFile(fileName, script))
return JSValue::encode(throwError(exec, createError(exec, "Could not open file.")));
JSGlobalObject* globalObject = exec->lexicalGlobalObject();
StopWatch stopWatch;
stopWatch.start();
JSValue syntaxException;
bool validSyntax = checkSyntax(globalObject->globalExec(), jscSource(script.data(), fileName), &syntaxException);
stopWatch.stop();
if (!validSyntax)
throwError(exec, syntaxException);
return JSValue::encode(jsNumber(stopWatch.getElapsedMS()));
}
#if ENABLE(SAMPLING_FLAGS)
EncodedJSValue JSC_HOST_CALL functionSetSamplingFlags(ExecState* exec)
{
for (unsigned i = 0; i < exec->argumentCount(); ++i) {
unsigned flag = static_cast<unsigned>(exec->argument(i).toNumber(exec));
if ((flag >= 1) && (flag <= 32))
SamplingFlags::setFlag(flag);
}
return JSValue::encode(jsNull());
}
EncodedJSValue JSC_HOST_CALL functionClearSamplingFlags(ExecState* exec)
{
for (unsigned i = 0; i < exec->argumentCount(); ++i) {
unsigned flag = static_cast<unsigned>(exec->argument(i).toNumber(exec));
if ((flag >= 1) && (flag <= 32))
SamplingFlags::clearFlag(flag);
}
return JSValue::encode(jsNull());
}
#endif
EncodedJSValue JSC_HOST_CALL functionReadline(ExecState* exec)
{
Vector<char, 256> line;
int c;
while ((c = getchar()) != EOF) {
// FIXME: Should we also break on \r?
if (c == '\n')
break;
line.append(c);
}
line.append('\0');
return JSValue::encode(jsString(exec, line.data()));
}
EncodedJSValue JSC_HOST_CALL functionPreciseTime(ExecState*)
{
return JSValue::encode(jsNumber(currentTime()));
}
EncodedJSValue JSC_HOST_CALL functionQuit(ExecState*)
{
exit(EXIT_SUCCESS);
#if COMPILER(MSVC) && OS(WINCE)
// Without this, Visual Studio will complain that this method does not return a value.
return JSValue::encode(jsUndefined());
#endif
}
// Use SEH for Release builds only to get rid of the crash report dialog
// (luckily the same tests fail in Release and Debug builds so far). Need to
// be in a separate main function because the jscmain function requires object
// unwinding.
#if COMPILER(MSVC) && !COMPILER(INTEL) && !defined(_DEBUG) && !OS(WINCE)
#define TRY __try {
#define EXCEPT(x) } __except (EXCEPTION_EXECUTE_HANDLER) { x; }
#else
#define TRY
#define EXCEPT(x)
#endif
int jscmain(int argc, char** argv);
int main(int argc, char** argv)
{
#if PLATFORM(IOS)
// Enabled IEEE754 denormal support.
fenv_t env;
fegetenv( &env );
env.__fpscr &= ~0x01000000u;
fesetenv( &env );
#endif
#if OS(WINDOWS)
#if !OS(WINCE)
// Cygwin calls ::SetErrorMode(SEM_FAILCRITICALERRORS), which we will inherit. This is bad for
// testing/debugging, as it causes the post-mortem debugger not to be invoked. We reset the
// error mode here to work around Cygwin's behavior. See <http://webkit.org/b/55222>.
::SetErrorMode(0);
#endif
#if defined(_DEBUG)
_CrtSetReportFile(_CRT_WARN, _CRTDBG_FILE_STDERR);
_CrtSetReportMode(_CRT_WARN, _CRTDBG_MODE_FILE);
_CrtSetReportFile(_CRT_ERROR, _CRTDBG_FILE_STDERR);
_CrtSetReportMode(_CRT_ERROR, _CRTDBG_MODE_FILE);
_CrtSetReportFile(_CRT_ASSERT, _CRTDBG_FILE_STDERR);
_CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_FILE);
#endif
timeBeginPeriod(1);
#endif
#if PLATFORM(QT)
QCoreApplication app(argc, argv);
#endif
// Initialize JSC before getting JSGlobalData.
#if ENABLE(SAMPLING_REGIONS)
WTF::initializeMainThread();
#endif
JSC::initializeThreading();
// We can't use destructors in the following code because it uses Windows
// Structured Exception Handling
int res = 0;
TRY
res = jscmain(argc, argv);
EXCEPT(res = 3)
return res;
}
static bool runWithScripts(GlobalObject* globalObject, const Vector<Script>& scripts, bool dump)
{
const char* script;
UString fileName;
Vector<char> scriptBuffer;
if (dump)
BytecodeGenerator::setDumpsGeneratedCode(true);
JSGlobalData& globalData = globalObject->globalData();
#if ENABLE(SAMPLING_FLAGS)
SamplingFlags::start();
#endif
bool success = true;
for (size_t i = 0; i < scripts.size(); i++) {
if (scripts[i].isFile) {
fileName = scripts[i].argument;
if (!fillBufferWithContentsOfFile(fileName, scriptBuffer))
return false; // fail early so we can catch missing files
script = scriptBuffer.data();
} else {
script = scripts[i].argument;
fileName = "[Command Line]";
}
globalData.startSampling();
JSValue evaluationException;
JSValue returnValue = evaluate(globalObject->globalExec(), globalObject->globalScopeChain(), jscSource(script, fileName), JSValue(), &evaluationException);
success = success && !evaluationException;
if (dump && !evaluationException)
printf("End: %s\n", returnValue.toString(globalObject->globalExec())->value(globalObject->globalExec()).utf8().data());
if (evaluationException) {
printf("Exception: %s\n", evaluationException.toString(globalObject->globalExec())->value(globalObject->globalExec()).utf8().data());
Identifier stackID(globalObject->globalExec(), "stack");
JSValue stackValue = evaluationException.get(globalObject->globalExec(), stackID);
if (!stackValue.isUndefinedOrNull())
printf("%s\n", stackValue.toString(globalObject->globalExec())->value(globalObject->globalExec()).utf8().data());
}
globalData.stopSampling();
globalObject->globalExec()->clearException();
}
#if ENABLE(SAMPLING_FLAGS)
SamplingFlags::stop();
#endif
#if ENABLE(SAMPLING_REGIONS)
SamplingRegion::dump();
#endif
globalData.dumpSampleData(globalObject->globalExec());
#if ENABLE(SAMPLING_COUNTERS)
AbstractSamplingCounter::dump();
#endif
#if ENABLE(REGEXP_TRACING)
globalData.dumpRegExpTrace();
#endif
return success;
}
#define RUNNING_FROM_XCODE 0
static void runInteractive(GlobalObject* globalObject)
{
UString interpreterName("Interpreter");
while (true) {
#if HAVE(READLINE) && !RUNNING_FROM_XCODE
char* line = readline(interactivePrompt);
if (!line)
break;
if (line[0])
add_history(line);
JSValue evaluationException;
JSValue returnValue = evaluate(globalObject->globalExec(), globalObject->globalScopeChain(), jscSource(line, interpreterName), JSValue(), &evaluationException);
free(line);
#else
printf("%s", interactivePrompt);
Vector<char, 256> line;
int c;
while ((c = getchar()) != EOF) {
// FIXME: Should we also break on \r?
if (c == '\n')
break;
line.append(c);
}
if (line.isEmpty())
break;
line.append('\0');
JSValue evaluationException;
JSValue returnValue = evaluate(globalObject->globalExec(), globalObject->globalScopeChain(), jscSource(line.data(), interpreterName), JSValue(), &evaluationException);
#endif
if (evaluationException)
printf("Exception: %s\n", evaluationException.toString(globalObject->globalExec())->value(globalObject->globalExec()).utf8().data());
else
printf("%s\n", returnValue.toString(globalObject->globalExec())->value(globalObject->globalExec()).utf8().data());
globalObject->globalExec()->clearException();
}
printf("\n");
}
static NO_RETURN void printUsageStatement(bool help = false)
{
fprintf(stderr, "Usage: jsc [options] [files] [-- arguments]\n");
fprintf(stderr, " -d Dumps bytecode (debug builds only)\n");
fprintf(stderr, " -e Evaluate argument as script code\n");
fprintf(stderr, " -f Specifies a source file (deprecated)\n");
fprintf(stderr, " -h|--help Prints this help message\n");
fprintf(stderr, " -i Enables interactive mode (default if no files are specified)\n");
#if HAVE(SIGNAL_H)
fprintf(stderr, " -s Installs signal handlers that exit on a crash (Unix platforms only)\n");
#endif
exit(help ? EXIT_SUCCESS : EXIT_FAILURE);
}
static void parseArguments(int argc, char** argv, CommandLine& options)
{
int i = 1;
for (; i < argc; ++i) {
const char* arg = argv[i];
if (!strcmp(arg, "-f")) {
if (++i == argc)
printUsageStatement();
options.scripts.append(Script(true, argv[i]));
continue;
}
if (!strcmp(arg, "-e")) {
if (++i == argc)
printUsageStatement();
options.scripts.append(Script(false, argv[i]));
continue;
}
if (!strcmp(arg, "-i")) {
options.interactive = true;
continue;
}
if (!strcmp(arg, "-d")) {
options.dump = true;
continue;
}
if (!strcmp(arg, "-s")) {
#if HAVE(SIGNAL_H)
signal(SIGILL, _exit);
signal(SIGFPE, _exit);
signal(SIGBUS, _exit);
signal(SIGSEGV, _exit);
#endif
continue;
}
if (!strcmp(arg, "--")) {
++i;
break;
}
if (!strcmp(arg, "-h") || !strcmp(arg, "--help"))
printUsageStatement(true);
options.scripts.append(Script(true, argv[i]));
}
if (options.scripts.isEmpty())
options.interactive = true;
for (; i < argc; ++i)
options.arguments.append(argv[i]);
}
int jscmain(int argc, char** argv)
{
RefPtr<JSGlobalData> globalData = JSGlobalData::create(ThreadStackTypeLarge, LargeHeap);
JSLockHolder lock(globalData.get());
CommandLine options;
parseArguments(argc, argv, options);
GlobalObject* globalObject = GlobalObject::create(*globalData, GlobalObject::createStructure(*globalData, jsNull()), options.arguments);
bool success = runWithScripts(globalObject, options.scripts, options.dump);
if (options.interactive && success)
runInteractive(globalObject);
return success ? 0 : 3;
}
static bool fillBufferWithContentsOfFile(const UString& fileName, Vector<char>& buffer)
{
FILE* f = fopen(fileName.utf8().data(), "r");
if (!f) {
fprintf(stderr, "Could not open file: %s\n", fileName.utf8().data());
return false;
}
size_t bufferSize = 0;
size_t bufferCapacity = 1024;
buffer.resize(bufferCapacity);
while (!feof(f) && !ferror(f)) {
bufferSize += fread(buffer.data() + bufferSize, 1, bufferCapacity - bufferSize, f);
if (bufferSize == bufferCapacity) { // guarantees space for trailing '\0'
bufferCapacity *= 2;
buffer.resize(bufferCapacity);
}
}
fclose(f);
buffer[bufferSize] = '\0';
if (buffer[0] == '#' && buffer[1] == '!')
buffer[0] = buffer[1] = '/';
return true;
}