--- /dev/null
+/*
+ * Copyright (C) 2008 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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.
+ */
+
+#include "config.h"
+#include "JIT.h"
+
+#if ENABLE(JIT)
+
+#include "CodeBlock.h"
+#include "JITInlineMethods.h"
+#include "JSArray.h"
+#include "JSFunction.h"
+#include "Interpreter.h"
+#include "ResultType.h"
+#include "SamplingTool.h"
+
+#ifndef NDEBUG
+#include <stdio.h>
+#endif
+
+using namespace std;
+
+namespace JSC {
+
+void JIT::unlinkCall(CallLinkInfo* callLinkInfo)
+{
+ // When the JSFunction is deleted the pointer embedded in the instruction stream will no longer be valid
+ // (and, if a new JSFunction happened to be constructed at the same location, we could get a false positive
+ // match). Reset the check so it no longer matches.
+ DataLabelPtr::patch(callLinkInfo->hotPathBegin, JSValuePtr::encode(jsImpossibleValue()));
+}
+
+void JIT::linkCall(JSFunction* callee, CodeBlock* calleeCodeBlock, void* ctiCode, CallLinkInfo* callLinkInfo, int callerArgCount)
+{
+ // Currently we only link calls with the exact number of arguments.
+ if (callerArgCount == calleeCodeBlock->m_numParameters) {
+ ASSERT(!callLinkInfo->isLinked());
+
+ calleeCodeBlock->addCaller(callLinkInfo);
+
+ DataLabelPtr::patch(callLinkInfo->hotPathBegin, callee);
+ Jump::patch(callLinkInfo->hotPathOther, ctiCode);
+ }
+
+ // patch the instruction that jumps out to the cold path, so that we only try to link once.
+ void* patchCheck = reinterpret_cast<void*>(reinterpret_cast<ptrdiff_t>(callLinkInfo->hotPathBegin) + patchOffsetOpCallCompareToJump);
+ Jump::patch(patchCheck, callLinkInfo->coldPathOther);
+}
+
+void JIT::compileOpCallInitializeCallFrame()
+{
+ store32(X86::edx, Address(callFrameRegister, RegisterFile::ArgumentCount * static_cast<int>(sizeof(Register))));
+
+ loadPtr(Address(X86::ecx, FIELD_OFFSET(JSFunction, m_scopeChain) + FIELD_OFFSET(ScopeChain, m_node)), X86::edx); // newScopeChain
+
+ storePtr(ImmPtr(JSValuePtr::encode(noValue())), Address(callFrameRegister, RegisterFile::OptionalCalleeArguments * static_cast<int>(sizeof(Register))));
+ storePtr(X86::ecx, Address(callFrameRegister, RegisterFile::Callee * static_cast<int>(sizeof(Register))));
+ storePtr(X86::edx, Address(callFrameRegister, RegisterFile::ScopeChain * static_cast<int>(sizeof(Register))));
+}
+
+void JIT::compileOpCallSetupArgs(Instruction* instruction)
+{
+ int argCount = instruction[3].u.operand;
+ int registerOffset = instruction[4].u.operand;
+
+ // ecx holds func
+ emitPutJITStubArg(X86::ecx, 1);
+ emitPutJITStubArgConstant(registerOffset, 2);
+ emitPutJITStubArgConstant(argCount, 3);
+}
+
+void JIT::compileOpCallEvalSetupArgs(Instruction* instruction)
+{
+ int argCount = instruction[3].u.operand;
+ int registerOffset = instruction[4].u.operand;
+
+ // ecx holds func
+ emitPutJITStubArg(X86::ecx, 1);
+ emitPutJITStubArgConstant(registerOffset, 2);
+ emitPutJITStubArgConstant(argCount, 3);
+}
+
+void JIT::compileOpConstructSetupArgs(Instruction* instruction)
+{
+ int argCount = instruction[3].u.operand;
+ int registerOffset = instruction[4].u.operand;
+ int proto = instruction[5].u.operand;
+ int thisRegister = instruction[6].u.operand;
+
+ // ecx holds func
+ emitPutJITStubArg(X86::ecx, 1);
+ emitPutJITStubArgConstant(registerOffset, 2);
+ emitPutJITStubArgConstant(argCount, 3);
+ emitPutJITStubArgFromVirtualRegister(proto, 4, X86::eax);
+ emitPutJITStubArgConstant(thisRegister, 5);
+}
+
+#if !ENABLE(JIT_OPTIMIZE_CALL)
+
+void JIT::compileOpCall(OpcodeID opcodeID, Instruction* instruction, unsigned)
+{
+ int dst = instruction[1].u.operand;
+ int callee = instruction[2].u.operand;
+ int argCount = instruction[3].u.operand;
+ int registerOffset = instruction[4].u.operand;
+
+ // Handle eval
+ Jump wasEval;
+ if (opcodeID == op_call_eval) {
+ emitGetVirtualRegister(callee, X86::ecx);
+ compileOpCallEvalSetupArgs(instruction);
+
+ emitCTICall(Interpreter::cti_op_call_eval);
+ wasEval = jnePtr(X86::eax, ImmPtr(JSValuePtr::encode(jsImpossibleValue())));
+ }
+
+ emitGetVirtualRegister(callee, X86::ecx);
+ // The arguments have been set up on the hot path for op_call_eval
+ if (opcodeID == op_call)
+ compileOpCallSetupArgs(instruction);
+ else if (opcodeID == op_construct)
+ compileOpConstructSetupArgs(instruction);
+
+ // Check for JSFunctions.
+ emitJumpSlowCaseIfNotJSCell(X86::ecx);
+ addSlowCase(jnePtr(Address(X86::ecx), ImmPtr(m_interpreter->m_jsFunctionVptr)));
+
+ // First, in the case of a construct, allocate the new object.
+ if (opcodeID == op_construct) {
+ emitCTICall(Interpreter::cti_op_construct_JSConstruct);
+ emitPutVirtualRegister(registerOffset - RegisterFile::CallFrameHeaderSize - argCount);
+ emitGetVirtualRegister(callee, X86::ecx);
+ }
+
+ // Speculatively roll the callframe, assuming argCount will match the arity.
+ storePtr(callFrameRegister, Address(callFrameRegister, (RegisterFile::CallerFrame + registerOffset) * static_cast<int>(sizeof(Register))));
+ addPtr(Imm32(registerOffset * static_cast<int>(sizeof(Register))), callFrameRegister);
+ move(Imm32(argCount), X86::edx);
+
+ emitNakedCall(m_interpreter->m_ctiVirtualCall);
+
+ if (opcodeID == op_call_eval)
+ wasEval.link(this);
+
+ // Put the return value in dst. In the interpreter, op_ret does this.
+ emitPutVirtualRegister(dst);
+
+ sampleCodeBlock(m_codeBlock);
+}
+
+void JIT::compileOpCallSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter, unsigned, OpcodeID opcodeID)
+{
+ int dst = instruction[1].u.operand;
+
+ linkSlowCase(iter);
+ linkSlowCase(iter);
+
+ // This handles host functions
+ emitCTICall(((opcodeID == op_construct) ? Interpreter::cti_op_construct_NotJSConstruct : Interpreter::cti_op_call_NotJSFunction));
+ // Put the return value in dst. In the interpreter, op_ret does this.
+ emitPutVirtualRegister(dst);
+
+ sampleCodeBlock(m_codeBlock);
+}
+
+#else
+
+static NO_RETURN void unreachable()
+{
+ ASSERT_NOT_REACHED();
+ exit(1);
+}
+
+void JIT::compileOpCall(OpcodeID opcodeID, Instruction* instruction, unsigned callLinkInfoIndex)
+{
+ int dst = instruction[1].u.operand;
+ int callee = instruction[2].u.operand;
+ int argCount = instruction[3].u.operand;
+ int registerOffset = instruction[4].u.operand;
+
+ // Handle eval
+ Jump wasEval;
+ if (opcodeID == op_call_eval) {
+ emitGetVirtualRegister(callee, X86::ecx);
+ compileOpCallEvalSetupArgs(instruction);
+
+ emitCTICall(Interpreter::cti_op_call_eval);
+ wasEval = jnePtr(X86::eax, ImmPtr(JSValuePtr::encode(jsImpossibleValue())));
+ }
+
+ // This plants a check for a cached JSFunction value, so we can plant a fast link to the callee.
+ // This deliberately leaves the callee in ecx, used when setting up the stack frame below
+ emitGetVirtualRegister(callee, X86::ecx);
+ DataLabelPtr addressOfLinkedFunctionCheck;
+ Jump jumpToSlow = jnePtrWithPatch(X86::ecx, addressOfLinkedFunctionCheck, ImmPtr(JSValuePtr::encode(jsImpossibleValue())));
+ addSlowCase(jumpToSlow);
+ ASSERT(differenceBetween(addressOfLinkedFunctionCheck, jumpToSlow) == patchOffsetOpCallCompareToJump);
+ m_callStructureStubCompilationInfo[callLinkInfoIndex].hotPathBegin = addressOfLinkedFunctionCheck;
+
+ // The following is the fast case, only used whan a callee can be linked.
+
+ // In the case of OpConstruct, call out to a cti_ function to create the new object.
+ if (opcodeID == op_construct) {
+ int proto = instruction[5].u.operand;
+ int thisRegister = instruction[6].u.operand;
+
+ emitPutJITStubArg(X86::ecx, 1);
+ emitPutJITStubArgFromVirtualRegister(proto, 4, X86::eax);
+ emitCTICall(Interpreter::cti_op_construct_JSConstruct);
+ emitPutVirtualRegister(thisRegister);
+ emitGetVirtualRegister(callee, X86::ecx);
+ }
+
+ // Fast version of stack frame initialization, directly relative to edi.
+ // Note that this omits to set up RegisterFile::CodeBlock, which is set in the callee
+ storePtr(ImmPtr(JSValuePtr::encode(noValue())), Address(callFrameRegister, (registerOffset + RegisterFile::OptionalCalleeArguments) * static_cast<int>(sizeof(Register))));
+ storePtr(X86::ecx, Address(callFrameRegister, (registerOffset + RegisterFile::Callee) * static_cast<int>(sizeof(Register))));
+ loadPtr(Address(X86::ecx, FIELD_OFFSET(JSFunction, m_scopeChain) + FIELD_OFFSET(ScopeChain, m_node)), X86::edx); // newScopeChain
+ store32(Imm32(argCount), Address(callFrameRegister, (registerOffset + RegisterFile::ArgumentCount) * static_cast<int>(sizeof(Register))));
+ storePtr(callFrameRegister, Address(callFrameRegister, (registerOffset + RegisterFile::CallerFrame) * static_cast<int>(sizeof(Register))));
+ storePtr(X86::edx, Address(callFrameRegister, (registerOffset + RegisterFile::ScopeChain) * static_cast<int>(sizeof(Register))));
+ addPtr(Imm32(registerOffset * sizeof(Register)), callFrameRegister);
+
+ // Call to the callee
+ m_callStructureStubCompilationInfo[callLinkInfoIndex].hotPathOther = emitNakedCall(reinterpret_cast<void*>(unreachable));
+
+ if (opcodeID == op_call_eval)
+ wasEval.link(this);
+
+ // Put the return value in dst. In the interpreter, op_ret does this.
+ emitPutVirtualRegister(dst);
+
+ sampleCodeBlock(m_codeBlock);
+}
+
+void JIT::compileOpCallSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter, unsigned callLinkInfoIndex, OpcodeID opcodeID)
+{
+ int dst = instruction[1].u.operand;
+ int callee = instruction[2].u.operand;
+ int argCount = instruction[3].u.operand;
+ int registerOffset = instruction[4].u.operand;
+
+ linkSlowCase(iter);
+
+ // The arguments have been set up on the hot path for op_call_eval
+ if (opcodeID == op_call)
+ compileOpCallSetupArgs(instruction);
+ else if (opcodeID == op_construct)
+ compileOpConstructSetupArgs(instruction);
+
+ // Fast check for JS function.
+ Jump callLinkFailNotObject = emitJumpIfNotJSCell(X86::ecx);
+ Jump callLinkFailNotJSFunction = jnePtr(Address(X86::ecx), ImmPtr(m_interpreter->m_jsFunctionVptr));
+
+ // First, in the case of a construct, allocate the new object.
+ if (opcodeID == op_construct) {
+ emitCTICall(Interpreter::cti_op_construct_JSConstruct);
+ emitPutVirtualRegister(registerOffset - RegisterFile::CallFrameHeaderSize - argCount);
+ emitGetVirtualRegister(callee, X86::ecx);
+ }
+
+ move(Imm32(argCount), X86::edx);
+
+ // Speculatively roll the callframe, assuming argCount will match the arity.
+ storePtr(callFrameRegister, Address(callFrameRegister, (RegisterFile::CallerFrame + registerOffset) * static_cast<int>(sizeof(Register))));
+ addPtr(Imm32(registerOffset * static_cast<int>(sizeof(Register))), callFrameRegister);
+
+ m_callStructureStubCompilationInfo[callLinkInfoIndex].callReturnLocation =
+ emitNakedCall(m_interpreter->m_ctiVirtualCallPreLink);
+
+ Jump storeResultForFirstRun = jump();
+
+// FIXME: this label can be removed, since it is a fixed offset from 'callReturnLocation'.
+ // This is the address for the cold path *after* the first run (which tries to link the call).
+ m_callStructureStubCompilationInfo[callLinkInfoIndex].coldPathOther = MacroAssembler::Label(this);
+
+ // The arguments have been set up on the hot path for op_call_eval
+ if (opcodeID == op_call)
+ compileOpCallSetupArgs(instruction);
+ else if (opcodeID == op_construct)
+ compileOpConstructSetupArgs(instruction);
+
+ // Check for JSFunctions.
+ Jump isNotObject = emitJumpIfNotJSCell(X86::ecx);
+ Jump isJSFunction = jePtr(Address(X86::ecx), ImmPtr(m_interpreter->m_jsFunctionVptr));
+
+ // This handles host functions
+ isNotObject.link(this);
+ callLinkFailNotObject.link(this);
+ callLinkFailNotJSFunction.link(this);
+ emitCTICall(((opcodeID == op_construct) ? Interpreter::cti_op_construct_NotJSConstruct : Interpreter::cti_op_call_NotJSFunction));
+ Jump wasNotJSFunction = jump();
+
+ // Next, handle JSFunctions...
+ isJSFunction.link(this);
+
+ // First, in the case of a construct, allocate the new object.
+ if (opcodeID == op_construct) {
+ emitCTICall(Interpreter::cti_op_construct_JSConstruct);
+ emitPutVirtualRegister(registerOffset - RegisterFile::CallFrameHeaderSize - argCount);
+ emitGetVirtualRegister(callee, X86::ecx);
+ }
+
+ // Speculatively roll the callframe, assuming argCount will match the arity.
+ storePtr(callFrameRegister, Address(callFrameRegister, (RegisterFile::CallerFrame + registerOffset) * static_cast<int>(sizeof(Register))));
+ addPtr(Imm32(registerOffset * static_cast<int>(sizeof(Register))), callFrameRegister);
+ move(Imm32(argCount), X86::edx);
+
+ emitNakedCall(m_interpreter->m_ctiVirtualCall);
+
+ // Put the return value in dst. In the interpreter, op_ret does this.
+ wasNotJSFunction.link(this);
+ storeResultForFirstRun.link(this);
+ emitPutVirtualRegister(dst);
+
+ sampleCodeBlock(m_codeBlock);
+}
+
+#endif
+
+} // namespace JSC
+
+#endif // ENABLE(JIT)
projects / apple / javascriptcore.git / blobdiff