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Remove trivial try-catch statements

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Signed-off-by: HyukWoo Park <hyukwoo.park@samsung.com>
This commit is contained in:
HyukWoo Park 2023-08-18 19:24:13 +09:00
commit 3f8ce198c9
5 changed files with 166 additions and 287 deletions
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50
src/api/EscargotPublic.cpp
View file

@ -1236,21 +1236,15 @@ StringRef* DebuggerOperationsRef::BreakpointOperations::eval(StringRef* sourceCo
debugger->setStopState(ESCARGOT_DEBUGGER_IN_EVAL_MODE);
try {
Value asValue(toImpl(sourceCode));
Value evalResult(Value::ForceUninitialized);
evalResult = state->context()->globalObject()->evalLocal(*state, asValue, state->thisValue(), reinterpret_cast<ByteCodeBlock*>(weakCodeRef())->m_codeBlock, true);
Value asValue(toImpl(sourceCode));
Value evalResult(Value::ForceUninitialized);
evalResult = state->context()->globalObject()->evalLocal(*state, asValue, state->thisValue(), reinterpret_cast<ByteCodeBlock*>(weakCodeRef())->m_codeBlock, true);
if (evalResult.isObject()) {
result = nullptr;
objectIndex = putObject(toRef(evalResult.asObject()));
} else {
result = evalResult.toStringWithoutException(*state);
}
} catch (const Value& val) {
result = val.toStringWithoutException(*state);
isError = true;
if (evalResult.isObject()) {
result = nullptr;
objectIndex = putObject(toRef(evalResult.asObject()));
} else {
result = evalResult.toStringWithoutException(*state);
}
debugger->setStopState(ESCARGOT_DEBUGGER_IN_WAIT_MODE);
@ -1364,13 +1358,9 @@ static void fillObjectProperties(ExecutionState* state, Object* object, Object::
result[start + i].key = toRef(keys[i].toStringWithoutException(*state));
try {
ObjectGetResult value = object->getOwnProperty(*state, propertyName);
ObjectGetResult value = object->getOwnProperty(*state, propertyName);
result[start + i].value = toRef(value.value(*state, Value(object)));
} catch (const Value& val) {
// The value field is optional, and not filled on error.
}
result[start + i].value = toRef(value.value(*state, Value(object)));
}
}
@ -1385,14 +1375,10 @@ static void fillRecordProperties(ExecutionState* state, EnvironmentRecord* recor
result[i].key = toRef(name.string());
try {
EnvironmentRecord::GetBindingValueResult value = record->getBindingValue(*state, name);
ASSERT(value.m_hasBindingValue);
EnvironmentRecord::GetBindingValueResult value = record->getBindingValue(*state, name);
ASSERT(value.m_hasBindingValue);
result[i].value = toRef(value.m_value);
} catch (const Value& val) {
// The value field is optional, and not filled on error.
}
result[i].value = toRef(value.m_value);
}
}
@ -1407,14 +1393,10 @@ static void fillRecordProperties(ExecutionState* state, ModuleEnvironmentRecord*
result[i].key = toRef(name.string());
try {
EnvironmentRecord::GetBindingValueResult value = record->getBindingValue(*state, name);
ASSERT(value.m_hasBindingValue);
EnvironmentRecord::GetBindingValueResult value = record->getBindingValue(*state, name);
ASSERT(value.m_hasBindingValue);
result[i].value = toRef(value.m_value);
} catch (const Value& val) {
// The value field is optional, and not filled on error.
}
result[i].value = toRef(value.m_value);
}
}

252
src/parser/Lexer.cpp
View file

@ -1699,154 +1699,102 @@ void Scanner::scanTemplate(Scanner::ScannerResult* token, bool head)
size_t indexForError = this->index;
bool tail = false;
try {
while (!this->eof()) {
char16_t ch = this->peekCharWithoutEOF();
++this->index;
indexForError = this->index;
if (ch == '`') {
tail = true;
while (!this->eof()) {
char16_t ch = this->peekCharWithoutEOF();
++this->index;
indexForError = this->index;
if (ch == '`') {
tail = true;
terminated = true;
break;
} else if (ch == '$') {
if (this->peekChar() == '{') {
++this->index;
indexForError = this->index;
terminated = true;
break;
} else if (ch == '$') {
if (this->peekChar() == '{') {
++this->index;
indexForError = this->index;
terminated = true;
break;
}
cooked += ch;
raw += ch;
} else if (ch == '\\') {
raw += ch;
ch = this->peekChar();
if (!isLineTerminator(ch)) {
auto currentIndex = this->index;
++this->index;
switch (ch) {
case 'n':
cooked += '\n';
break;
case 'r':
cooked += '\r';
break;
case 't':
cooked += '\t';
break;
case 'u':
if (this->peekChar() == '{') {
++this->index;
cooked += this->scanUnicodeCodePointEscape();
} else {
const size_t restore = this->index;
const char32_t unescaped = this->scanHexEscape(ch);
if (unescaped != EMPTY_CODE_POINT) {
ParserCharPiece piece(unescaped);
cooked += UTF16StringDataNonGCStd(piece.data, piece.length);
} else {
this->throwUnexpectedToken(Messages::InvalidHexEscapeSequence);
}
}
break;
case 'x': {
const char32_t unescaped = this->scanHexEscape(ch);
if (unescaped == EMPTY_CODE_POINT) {
this->throwUnexpectedToken(Messages::InvalidHexEscapeSequence);
}
ParserCharPiece piece(unescaped);
cooked += UTF16StringDataNonGCStd(piece.data, piece.length);
break;
}
case 'b':
cooked += '\b';
break;
case 'f':
cooked += '\f';
break;
case 'v':
cooked += '\v';
break;
default:
if (ch == '0') {
if (isDecimalDigit(this->peekChar())) {
// Illegal: \01 \02 and so on
this->throwUnexpectedToken(Messages::TemplateOctalLiteral);
}
cooked += (char16_t)'\0';
} else if (isOctalDigit(ch)) {
// Illegal: \1 \2
this->throwUnexpectedToken(Messages::TemplateOctalLiteral);
} else {
cooked += ch;
}
break;
}
auto endIndex = this->index;
for (size_t i = currentIndex; i < endIndex; i++) {
raw += this->sourceCharAt(i);
}
} else {
++this->index;
indexForError = this->index;
++this->lineNumber;
if (ch == '\r' && this->peekChar() == '\n') {
++this->index;
indexForError = this->index;
}
if (ch == 0x2028 || ch == 0x2029) {
raw += ch;
} else {
raw += '\n';
}
this->lineStart = this->index;
}
} else if (isLineTerminator(ch)) {
++this->lineNumber;
if (ch == '\r' && this->peekChar() == '\n') {
++this->index;
indexForError = this->index;
}
if (ch == 0x2028 || ch == 0x2029) {
raw += ch;
cooked += ch;
} else {
raw += '\n';
}
cooked += ch;
raw += ch;
} else if (ch == '\\') {
raw += ch;
ch = this->peekChar();
if (!isLineTerminator(ch)) {
auto currentIndex = this->index;
++this->index;
switch (ch) {
case 'n':
cooked += '\n';
}
this->lineStart = this->index;
} else {
cooked += ch;
raw += ch;
}
}
if (!terminated) {
this->throwUnexpectedToken();
}
} catch (esprima::Error* err) {
error = new (GC) esprima::Error(*err);
delete err;
this->index = indexForError;
while (!this->eof()) {
char16_t ch = this->peekCharWithoutEOF();
++this->index;
if (ch == '`') {
tail = true;
terminated = true;
break;
} else if (ch == '$') {
if (this->peekChar() == '{') {
++this->index;
terminated = true;
break;
case 'r':
cooked += '\r';
break;
case 't':
cooked += '\t';
break;
case 'u':
if (this->peekChar() == '{') {
++this->index;
cooked += this->scanUnicodeCodePointEscape();
} else {
const size_t restore = this->index;
const char32_t unescaped = this->scanHexEscape(ch);
if (unescaped != EMPTY_CODE_POINT) {
ParserCharPiece piece(unescaped);
cooked += UTF16StringDataNonGCStd(piece.data, piece.length);
} else {
// ignore exception
RELEASE_ASSERT_NOT_REACHED();
}
}
break;
case 'x': {
const char32_t unescaped = this->scanHexEscape(ch);
if (unescaped == EMPTY_CODE_POINT) {
// ignore exception
RELEASE_ASSERT_NOT_REACHED();
}
ParserCharPiece piece(unescaped);
cooked += UTF16StringDataNonGCStd(piece.data, piece.length);
break;
}
cooked += ch;
raw += ch;
} else if (isLineTerminator(ch)) {
case 'b':
cooked += '\b';
break;
case 'f':
cooked += '\f';
break;
case 'v':
cooked += '\v';
break;
default:
if (ch == '0') {
if (isDecimalDigit(this->peekChar())) {
// Illegal: \01 \02 and so on
// ignore exception
RELEASE_ASSERT_NOT_REACHED();
}
cooked += (char16_t)'\0';
} else if (isOctalDigit(ch)) {
// Illegal: \1 \2
// ignore exception
RELEASE_ASSERT_NOT_REACHED();
} else {
cooked += ch;
}
break;
}
auto endIndex = this->index;
for (size_t i = currentIndex; i < endIndex; i++) {
raw += this->sourceCharAt(i);
}
} else {
++this->index;
indexForError = this->index;
++this->lineNumber;
if (ch == '\r' && this->peekChar() == '\n') {
++this->index;
indexForError = this->index;
}
if (ch == 0x2028 || ch == 0x2029) {
raw += ch;
@ -1854,12 +1802,32 @@ void Scanner::scanTemplate(Scanner::ScannerResult* token, bool head)
raw += '\n';
}
this->lineStart = this->index;
} else {
raw += ch;
}
} else if (isLineTerminator(ch)) {
++this->lineNumber;
if (ch == '\r' && this->peekChar() == '\n') {
++this->index;
indexForError = this->index;
}
if (ch == 0x2028 || ch == 0x2029) {
raw += ch;
cooked += ch;
} else {
raw += '\n';
cooked += '\n';
}
this->lineStart = this->index;
} else {
cooked += ch;
raw += ch;
}
}
if (!terminated) {
// ignore exception
RELEASE_ASSERT_NOT_REACHED();
}
ScanTemplateResult* result = new ScanTemplateResult();
result->head = head;
result->tail = tail;

16
src/parser/Script.cpp
View file

@ -953,11 +953,8 @@ Script::ModuleExecutionResult Script::innerModuleEvaluation(ExecutionState& stat
ModuleEnvironmentRecord* moduleRecord = md->m_moduleRecord;
moduleRecord->createBinding(state, state.context()->staticStrings().stringStarDefaultStar, false, false, false);
try {
moduleRecord->initializeBinding(state, state.context()->staticStrings().stringStarDefaultStar, JSON::parse(state, sourceCode(), Value()));
} catch (const Value& e) {
md->m_evaluationError = EncodedValue(e);
}
// ignore exception
moduleRecord->initializeBinding(state, state.context()->staticStrings().stringStarDefaultStar, JSON::parse(state, sourceCode(), Value()));
} else if (md->m_pendingAsyncDependencies.hasValue() && md->m_pendingAsyncDependencies.value() > 0) {
// If module.[[PendingAsyncDependencies]] > 0, set module.[[AsyncEvaluating]] to true.
@ -1139,13 +1136,8 @@ Script::ModuleExecutionResult Script::moduleExecute(ExecutionState& state, Optio
bool gotException = false;
if (LIKELY(!m_topCodeBlock->isAsync())) {
try {
Interpreter::interpret(newState, byteCodeBlock, reinterpret_cast<size_t>(byteCodeBlock->m_code.data()), registerFile);
} catch (const Value& e) {
resultValue = e;
gotException = true;
}
// ignore exception
Interpreter::interpret(newState, byteCodeBlock, reinterpret_cast<size_t>(byteCodeBlock->m_code.data()), registerFile);
clearStack<512>();
// we give up program bytecodeblock after first excution for reducing memory usage

146
src/parser/ScriptParser.cpp
View file

@ -423,37 +423,27 @@ ScriptParser::InitializeScriptResult ScriptParser::initializeScript(String* orig
// Generate ByteCode
if (LIKELY(needByteCodeGeneration)) {
try {
#if defined(ENABLE_CODE_CACHE)
// Store cache
if (cacheable) {
codeCache->prepareCacheWriting(srcHash);
// Store cache
if (cacheable) {
codeCache->prepareCacheWriting(srcHash);
// For storing cache, CodeBlockTree is firstly saved
codeCache->storeCodeBlockTree(topCodeBlock, m_codeBlockCacheInfo);
// For storing cache, CodeBlockTree is firstly saved
codeCache->storeCodeBlockTree(topCodeBlock, m_codeBlockCacheInfo);
// After CodeBlockTree, ByteCode and StringTable are stored sequentially
topCodeBlock->m_byteCodeBlock = ByteCodeGenerator::generateByteCode(m_context, topCodeBlock, programNode, inWith, true);
// After CodeBlockTree, ByteCode and StringTable are stored sequentially
topCodeBlock->m_byteCodeBlock = ByteCodeGenerator::generateByteCode(m_context, topCodeBlock, programNode, inWith, true);
codeCache->postCacheWriting(srcHash);
deleteCodeBlockCacheInfo();
codeCache->postCacheWriting(srcHash);
deleteCodeBlockCacheInfo();
ESCARGOT_LOG_INFO("[CodeCache] Store CodeCache Done (%s)\n", srcName->toUTF8StringData().data());
} else {
topCodeBlock->m_byteCodeBlock = ByteCodeGenerator::generateByteCode(m_context, topCodeBlock, programNode, inWith, false);
}
#else
topCodeBlock->m_byteCodeBlock = ByteCodeGenerator::generateByteCode(m_context, topCodeBlock, programNode, inWith);
#endif
} catch (const char* message) {
m_context->astAllocator().reset();
GC_enable();
ScriptParser::InitializeScriptResult result;
result.parseErrorCode = ErrorCode::SyntaxError;
result.parseErrorMessage = String::fromASCII(message, strlen(message));
return result;
ESCARGOT_LOG_INFO("[CodeCache] Store CodeCache Done (%s)\n", srcName->toUTF8StringData().data());
} else {
topCodeBlock->m_byteCodeBlock = ByteCodeGenerator::generateByteCode(m_context, topCodeBlock, programNode, inWith, false);
}
#else
topCodeBlock->m_byteCodeBlock = ByteCodeGenerator::generateByteCode(m_context, topCodeBlock, programNode, inWith);
#endif
}
// reset ASTAllocator
@ -502,17 +492,7 @@ void ScriptParser::generateFunctionByteCode(ExecutionState& state, InterpretedCo
}
// Generate ByteCode
try {
codeBlock->m_byteCodeBlock = ByteCodeGenerator::generateByteCode(state.context(), codeBlock, functionNode);
} catch (const char* message) {
RELEASE_ASSERT_NOT_REACHED();
// reset ASTAllocator
m_context->astAllocator().reset();
GC_enable();
// ignore exception
ErrorObject::throwBuiltinError(state, ErrorCode::SyntaxError, message);
RELEASE_ASSERT_NOT_REACHED();
}
codeBlock->m_byteCodeBlock = ByteCodeGenerator::generateByteCode(state.context(), codeBlock, functionNode);
// reset ASTAllocator
m_context->astAllocator().reset();
@ -586,45 +566,28 @@ ScriptParser::InitializeScriptResult ScriptParser::initializeScriptWithDebugger(
Script* script = nullptr;
// Parsing
try {
ASTClassInfo* outerClassInfo = esprima::generateClassInfoFrom(m_context, parentCodeBlock);
ASTClassInfo* outerClassInfo = esprima::generateClassInfoFrom(m_context, parentCodeBlock);
programNode = esprima::parseProgram(m_context, sourceView, outerClassInfo, isModule, strictFromOutside, inWith, SIZE_MAX, allowSC, allowSP, allowNewTarget, allowArguments);
programNode = esprima::parseProgram(m_context, sourceView, outerClassInfo, isModule, strictFromOutside, inWith, SIZE_MAX, allowSC, allowSP, allowNewTarget, allowArguments);
script = new Script(srcName, source, programNode->moduleData(), !parentCodeBlock, originLineOffset);
if (parentCodeBlock) {
programNode->scopeContext()->m_hasEval = parentCodeBlock->hasEval();
programNode->scopeContext()->m_hasWith = parentCodeBlock->hasWith();
programNode->scopeContext()->m_isClassConstructor = parentCodeBlock->isClassConstructor();
programNode->scopeContext()->m_isDerivedClassConstructor = parentCodeBlock->isDerivedClassConstructor();
programNode->scopeContext()->m_isClassMethod = parentCodeBlock->isClassMethod();
programNode->scopeContext()->m_isClassStaticMethod = parentCodeBlock->isClassStaticMethod();
programNode->scopeContext()->m_allowSuperCall = parentCodeBlock->allowSuperCall();
programNode->scopeContext()->m_allowSuperProperty = parentCodeBlock->allowSuperProperty();
topCodeBlock = generateCodeBlockTreeFromASTWalker(m_context, sourceView, script, programNode->scopeContext(), parentCodeBlock, isEvalMode, isEvalCodeInFunction);
} else {
topCodeBlock = generateCodeBlockTreeFromAST(m_context, sourceView, script, programNode, isEvalMode, isEvalCodeInFunction);
}
generateCodeBlockTreeFromASTWalkerPostProcess(topCodeBlock);
} catch (esprima::Error* orgError) {
// reset ASTAllocator
m_context->astAllocator().reset();
if (m_context->debuggerEnabled()) {
m_context->debugger()->parseCompleted(originSource ? originSource : source, srcName, originLineOffset, orgError->message);
m_context->debugger()->clearParsingData();
m_context->debugger()->setInDebuggingCodeMode(false);
}
GC_enable();
ScriptParser::InitializeScriptResult result;
result.parseErrorCode = orgError->errorCode;
result.parseErrorMessage = orgError->message;
return result;
script = new Script(srcName, source, programNode->moduleData(), !parentCodeBlock, originLineOffset);
if (parentCodeBlock) {
programNode->scopeContext()->m_hasEval = parentCodeBlock->hasEval();
programNode->scopeContext()->m_hasWith = parentCodeBlock->hasWith();
programNode->scopeContext()->m_isClassConstructor = parentCodeBlock->isClassConstructor();
programNode->scopeContext()->m_isDerivedClassConstructor = parentCodeBlock->isDerivedClassConstructor();
programNode->scopeContext()->m_isClassMethod = parentCodeBlock->isClassMethod();
programNode->scopeContext()->m_isClassStaticMethod = parentCodeBlock->isClassStaticMethod();
programNode->scopeContext()->m_allowSuperCall = parentCodeBlock->allowSuperCall();
programNode->scopeContext()->m_allowSuperProperty = parentCodeBlock->allowSuperProperty();
topCodeBlock = generateCodeBlockTreeFromASTWalker(m_context, sourceView, script, programNode->scopeContext(), parentCodeBlock, isEvalMode, isEvalCodeInFunction);
} else {
topCodeBlock = generateCodeBlockTreeFromAST(m_context, sourceView, script, programNode, isEvalMode, isEvalCodeInFunction);
}
generateCodeBlockTreeFromASTWalkerPostProcess(topCodeBlock);
// dump Code Block
#ifndef NDEBUG
{
@ -638,41 +601,22 @@ ScriptParser::InitializeScriptResult ScriptParser::initializeScriptWithDebugger(
script->m_topCodeBlock = topCodeBlock;
// Generate ByteCode
try {
topCodeBlock->m_byteCodeBlock = ByteCodeGenerator::generateByteCode(m_context, topCodeBlock, programNode, inWith);
topCodeBlock->m_byteCodeBlock = ByteCodeGenerator::generateByteCode(m_context, topCodeBlock, programNode, inWith);
// reset ASTAllocator
m_context->astAllocator().reset();
// reset ASTAllocator
m_context->astAllocator().reset();
Debugger* debugger = m_context->debugger();
if (debugger != nullptr) {
recursivelyGenerateChildrenByteCode(topCodeBlock);
Debugger* debugger = m_context->debugger();
if (debugger != nullptr) {
recursivelyGenerateChildrenByteCode(topCodeBlock);
debugger->parseCompleted(originSource ? originSource : source, srcName, originLineOffset);
debugger->clearParsingData();
debugger->setInDebuggingCodeMode(false);
}
GC_enable();
} catch (const char* message) {
m_context->astAllocator().reset();
String* msg = String::fromASCII(message, strlen(message));
if (m_context->debuggerEnabled()) {
m_context->debugger()->parseCompleted(originSource ? originSource : source, srcName, originLineOffset, msg);
m_context->debugger()->clearParsingData();
m_context->debugger()->setInDebuggingCodeMode(false);
}
GC_enable();
ScriptParser::InitializeScriptResult result;
result.parseErrorCode = ErrorCode::SyntaxError;
result.parseErrorMessage = msg;
return result;
debugger->parseCompleted(originSource ? originSource : source, srcName, originLineOffset);
debugger->clearParsingData();
debugger->setInDebuggingCodeMode(false);
}
GC_enable();
ScriptParser::InitializeScriptResult result;
result.script = script;
return result;

13
src/runtime/RegExpObject.cpp
View file

@ -283,16 +283,9 @@ RegExpObject::RegExpCacheEntry& RegExpObject::getCacheEntryAndCompileIfNeeded(Ex
} else {
const char* yarrError = nullptr;
JSC::Yarr::YarrPattern* yarrPattern = nullptr;
try {
JSC::Yarr::ErrorCode errorCode = JSC::Yarr::ErrorCode::NoError;
yarrPattern = JSC::Yarr::YarrPattern::createYarrPattern(source, (JSC::Yarr::RegExpFlags)option, errorCode);
yarrError = JSC::Yarr::errorMessage(errorCode);
} catch (const std::bad_alloc& e) {
// Return Exception Done!
ErrorObject::throwBuiltinError(state, ErrorCode::TypeError, "got too complicated RegExp pattern to process");
auto iter = cache->insert(std::make_pair(RegExpCacheKey(source, option), RegExpCacheEntry())).first;
return iter.value();
}
JSC::Yarr::ErrorCode errorCode = JSC::Yarr::ErrorCode::NoError;
yarrPattern = JSC::Yarr::YarrPattern::createYarrPattern(source, (JSC::Yarr::RegExpFlags)option, errorCode);
yarrError = JSC::Yarr::errorMessage(errorCode);
auto iter = cache->insert(std::make_pair(RegExpCacheKey(source, option), RegExpCacheEntry(yarrError, yarrPattern))).first;
return iter.value();
}