runtime/Executable.cpp

   1 /*
   2  * Copyright (C) 2009 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "config.h"
  27 #include "Executable.h"
  28
  29 #include "BytecodeGenerator.h"
  30 #include "CodeBlock.h"
  31 #include "JIT.h"
  32 #include "Parser.h"
  33 #include "StringBuilder.h"
  34 #include "Vector.h"
  35
  36 namespace JSC {
  37
  38 #if ENABLE(JIT)
  39 NativeExecutable::~NativeExecutable()
  40 {
  41 }
  42 #endif
  43
  44 VPtrHackExecutable::~VPtrHackExecutable()
  45 {
  46 }
  47
  48 EvalExecutable::~EvalExecutable()
  49 {
  50     delete m_evalCodeBlock;
  51 }
  52
  53 ProgramExecutable::~ProgramExecutable()
  54 {
  55     delete m_programCodeBlock;
  56 }
  57
  58 FunctionExecutable::~FunctionExecutable()
  59 {
  60     delete m_codeBlock;
  61 }
  62
  63 JSObject* EvalExecutable::compile(ExecState* exec, ScopeChainNode* scopeChainNode)
  64 {
  65     int errLine;
  66     UString errMsg;
  67     RefPtr<EvalNode> evalNode = exec->globalData().parser->parse<EvalNode>(&exec->globalData(), exec->lexicalGlobalObject()->debugger(), exec, m_source, &errLine, &errMsg);
  68     if (!evalNode)
  69         return Error::create(exec, SyntaxError, errMsg, errLine, m_source.provider()->asID(), m_source.provider()->url());
  70     recordParse(evalNode->features(), evalNode->lineNo(), evalNode->lastLine());
  71
  72     ScopeChain scopeChain(scopeChainNode);
  73     JSGlobalObject* globalObject = scopeChain.globalObject();
  74
  75     ASSERT(!m_evalCodeBlock);
  76     m_evalCodeBlock = new EvalCodeBlock(this, globalObject, source().provider(), scopeChain.localDepth());
  77     OwnPtr<BytecodeGenerator> generator(new BytecodeGenerator(evalNode.get(), globalObject->debugger(), scopeChain, m_evalCodeBlock->symbolTable(), m_evalCodeBlock));
  78     generator->generate();
  79
  80     evalNode->destroyData();
  81     return 0;
  82 }
  83
  84 JSObject* ProgramExecutable::checkSyntax(ExecState* exec)
  85 {
  86     int errLine;
  87     UString errMsg;
  88     RefPtr<ProgramNode> programNode = exec->globalData().parser->parse<ProgramNode>(&exec->globalData(), exec->lexicalGlobalObject()->debugger(), exec, m_source, &errLine, &errMsg);
  89     if (!programNode)
  90         return Error::create(exec, SyntaxError, errMsg, errLine, m_source.provider()->asID(), m_source.provider()->url());
  91     return 0;
  92 }
  93
  94 JSObject* ProgramExecutable::compile(ExecState* exec, ScopeChainNode* scopeChainNode)
  95 {
  96     int errLine;
  97     UString errMsg;
  98     RefPtr<ProgramNode> programNode = exec->globalData().parser->parse<ProgramNode>(&exec->globalData(), exec->lexicalGlobalObject()->debugger(), exec, m_source, &errLine, &errMsg);
  99     if (!programNode)
 100         return Error::create(exec, SyntaxError, errMsg, errLine, m_source.provider()->asID(), m_source.provider()->url());
 101     recordParse(programNode->features(), programNode->lineNo(), programNode->lastLine());
 102
 103     ScopeChain scopeChain(scopeChainNode);
 104     JSGlobalObject* globalObject = scopeChain.globalObject();
 105
 106     ASSERT(!m_programCodeBlock);
 107     m_programCodeBlock = new ProgramCodeBlock(this, GlobalCode, globalObject, source().provider());
 108     OwnPtr<BytecodeGenerator> generator(new BytecodeGenerator(programNode.get(), globalObject->debugger(), scopeChain, &globalObject->symbolTable(), m_programCodeBlock));
 109     generator->generate();
 110
 111     programNode->destroyData();
 112     return 0;
 113 }
 114
 115 void FunctionExecutable::compile(ExecState*, ScopeChainNode* scopeChainNode)
 116 {
 117     JSGlobalData* globalData = scopeChainNode->globalData;
 118     RefPtr<FunctionBodyNode> body = globalData->parser->parse<FunctionBodyNode>(globalData, 0, 0, m_source);
 119     if (m_forceUsesArguments)
 120         body->setUsesArguments();
 121     body->finishParsing(m_parameters, m_name);
 122     recordParse(body->features(), body->lineNo(), body->lastLine());
 123
 124     ScopeChain scopeChain(scopeChainNode);
 125     JSGlobalObject* globalObject = scopeChain.globalObject();
 126
 127     ASSERT(!m_codeBlock);
 128     m_codeBlock = new FunctionCodeBlock(this, FunctionCode, source().provider(), source().startOffset());
 129     OwnPtr<BytecodeGenerator> generator(new BytecodeGenerator(body.get(), globalObject->debugger(), scopeChain, m_codeBlock->symbolTable(), m_codeBlock));
 130     generator->generate();
 131     m_numParameters = m_codeBlock->m_numParameters;
 132     ASSERT(m_numParameters);
 133     m_numVariables = m_codeBlock->m_numVars;
 134
 135     body->destroyData();
 136 }
 137
 138 #if ENABLE(JIT)
 139
 140 void EvalExecutable::generateJITCode(ExecState* exec, ScopeChainNode* scopeChainNode)
 141 {
 142 #if ENABLE(INTERPRETER)
 143     ASSERT(scopeChainNode->globalData->canUseJIT());
 144 #endif
 145     CodeBlock* codeBlock = &bytecode(exec, scopeChainNode);
 146     m_jitCode = JIT::compile(scopeChainNode->globalData, codeBlock);
 147
 148 #if !ENABLE(OPCODE_SAMPLING)
 149     if (!BytecodeGenerator::dumpsGeneratedCode())
 150         codeBlock->discardBytecode();
 151 #endif
 152 }
 153
 154 void ProgramExecutable::generateJITCode(ExecState* exec, ScopeChainNode* scopeChainNode)
 155 {
 156 #if ENABLE(INTERPRETER)
 157     ASSERT(scopeChainNode->globalData->canUseJIT());
 158 #endif
 159     CodeBlock* codeBlock = &bytecode(exec, scopeChainNode);
 160     m_jitCode = JIT::compile(scopeChainNode->globalData, codeBlock);
 161
 162 #if !ENABLE(OPCODE_SAMPLING)
 163     if (!BytecodeGenerator::dumpsGeneratedCode())
 164         codeBlock->discardBytecode();
 165 #endif
 166 }
 167
 168 void FunctionExecutable::generateJITCode(ExecState* exec, ScopeChainNode* scopeChainNode)
 169 {
 170 #if ENABLE(INTERPRETER)
 171     ASSERT(scopeChainNode->globalData->canUseJIT());
 172 #endif
 173     CodeBlock* codeBlock = &bytecode(exec, scopeChainNode);
 174     m_jitCode = JIT::compile(scopeChainNode->globalData, codeBlock);
 175
 176 #if !ENABLE(OPCODE_SAMPLING)
 177     if (!BytecodeGenerator::dumpsGeneratedCode())
 178         codeBlock->discardBytecode();
 179 #endif
 180 }
 181
 182 #endif
 183
 184 void FunctionExecutable::markAggregate(MarkStack& markStack)
 185 {
 186     if (m_codeBlock)
 187         m_codeBlock->markAggregate(markStack);
 188 }
 189
 190 ExceptionInfo* FunctionExecutable::reparseExceptionInfo(JSGlobalData* globalData, ScopeChainNode* scopeChainNode, CodeBlock* codeBlock)
 191 {
 192     RefPtr<FunctionBodyNode> newFunctionBody = globalData->parser->parse<FunctionBodyNode>(globalData, 0, 0, m_source);
 193     if (m_forceUsesArguments)
 194         newFunctionBody->setUsesArguments();
 195     newFunctionBody->finishParsing(m_parameters, m_name);
 196
 197     ScopeChain scopeChain(scopeChainNode);
 198     JSGlobalObject* globalObject = scopeChain.globalObject();
 199
 200     OwnPtr<CodeBlock> newCodeBlock(new FunctionCodeBlock(this, FunctionCode, source().provider(), source().startOffset()));
 201     globalData->functionCodeBlockBeingReparsed = newCodeBlock.get();
 202
 203     OwnPtr<BytecodeGenerator> generator(new BytecodeGenerator(newFunctionBody.get(), globalObject->debugger(), scopeChain, newCodeBlock->symbolTable(), newCodeBlock.get()));
 204     generator->setRegeneratingForExceptionInfo(static_cast<FunctionCodeBlock*>(codeBlock));
 205     generator->generate();
 206
 207     ASSERT(newCodeBlock->instructionCount() == codeBlock->instructionCount());
 208
 209 #if ENABLE(JIT)
 210 #if ENABLE(INTERPRETER)
 211     if (globalData->canUseJIT())
 212 #endif
 213     {
 214         JITCode newJITCode = JIT::compile(globalData, newCodeBlock.get(), generatedJITCode().start());
 215         ASSERT(newJITCode.size() == generatedJITCode().size());
 216     }
 217 #endif
 218
 219     globalData->functionCodeBlockBeingReparsed = 0;
 220
 221     return newCodeBlock->extractExceptionInfo();
 222 }
 223
 224 ExceptionInfo* EvalExecutable::reparseExceptionInfo(JSGlobalData* globalData, ScopeChainNode* scopeChainNode, CodeBlock* codeBlock)
 225 {
 226     RefPtr<EvalNode> newEvalBody = globalData->parser->parse<EvalNode>(globalData, 0, 0, m_source);
 227
 228     ScopeChain scopeChain(scopeChainNode);
 229     JSGlobalObject* globalObject = scopeChain.globalObject();
 230
 231     OwnPtr<EvalCodeBlock> newCodeBlock(new EvalCodeBlock(this, globalObject, source().provider(), scopeChain.localDepth()));
 232
 233     OwnPtr<BytecodeGenerator> generator(new BytecodeGenerator(newEvalBody.get(), globalObject->debugger(), scopeChain, newCodeBlock->symbolTable(), newCodeBlock.get()));
 234     generator->setRegeneratingForExceptionInfo(static_cast<EvalCodeBlock*>(codeBlock));
 235     generator->generate();
 236
 237     ASSERT(newCodeBlock->instructionCount() == codeBlock->instructionCount());
 238
 239 #if ENABLE(JIT)
 240 #if ENABLE(INTERPRETER)
 241     if (globalData->canUseJIT())
 242 #endif
 243     {
 244         JITCode newJITCode = JIT::compile(globalData, newCodeBlock.get(), generatedJITCode().start());
 245         ASSERT(newJITCode.size() == generatedJITCode().size());
 246     }
 247 #endif
 248
 249     return newCodeBlock->extractExceptionInfo();
 250 }
 251
 252 void FunctionExecutable::recompile()
 253 {
 254     delete m_codeBlock;
 255     m_codeBlock = 0;
 256     m_numParameters = NUM_PARAMETERS_NOT_COMPILED;
 257 #if ENABLE(JIT)
 258     m_jitCode = JITCode();
 259 #endif
 260 }
 261
 262 PassRefPtr<FunctionExecutable> FunctionExecutable::fromGlobalCode(const Identifier& functionName, ExecState* exec, Debugger* debugger, const SourceCode& source, int* errLine, UString* errMsg)
 263 {
 264     RefPtr<ProgramNode> program = exec->globalData().parser->parse<ProgramNode>(&exec->globalData(), debugger, exec, source, errLine, errMsg);
 265     if (!program)
 266         return 0;
 267
 268     StatementNode* exprStatement = program->singleStatement();
 269     ASSERT(exprStatement);
 270     ASSERT(exprStatement->isExprStatement());
 271     if (!exprStatement || !exprStatement->isExprStatement())
 272         return 0;
 273
 274     ExpressionNode* funcExpr = static_cast<ExprStatementNode*>(exprStatement)->expr();
 275     ASSERT(funcExpr);
 276     ASSERT(funcExpr->isFuncExprNode());
 277     if (!funcExpr || !funcExpr->isFuncExprNode())
 278         return 0;
 279
 280     FunctionBodyNode* body = static_cast<FuncExprNode*>(funcExpr)->body();
 281     ASSERT(body);
 282     return FunctionExecutable::create(&exec->globalData(), functionName, body->source(), body->usesArguments(), body->parameters(), body->lineNo(), body->lastLine());
 283 }
 284
 285 UString FunctionExecutable::paramString() const
 286 {
 287     FunctionParameters& parameters = *m_parameters;
 288     StringBuilder builder;
 289     for (size_t pos = 0; pos < parameters.size(); ++pos) {
 290         if (!builder.isEmpty())
 291             builder.append(", ");
 292         builder.append(parameters[pos].ustring());
 293     }
 294     return builder.build();
 295 }
 296
 297 };
 298
 299