2009-05-04 07:16:10 +00:00
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// Copyright 2009 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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2009-05-20 13:20:02 +00:00
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#include "v8.h"
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#include "macro-assembler.h"
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#include "register-allocator-inl.h"
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#include "codegen.h"
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2009-05-25 10:05:56 +00:00
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namespace v8 {
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namespace internal {
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2009-05-20 13:20:02 +00:00
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2009-06-05 17:14:06 +00:00
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// -------------------------------------------------------------------------
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// Platform-specific DeferredCode functions.
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void DeferredCode::SaveRegisters() { UNIMPLEMENTED(); }
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void DeferredCode::RestoreRegisters() { UNIMPLEMENTED(); }
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2009-05-20 13:20:02 +00:00
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CodeGenerator::CodeGenerator(int buffer_size,
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Handle<Script> script,
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bool is_eval)
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: is_eval_(is_eval),
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script_(script),
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deferred_(8),
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masm_(new MacroAssembler(NULL, buffer_size)),
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scope_(NULL),
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frame_(NULL),
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allocator_(NULL),
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state_(NULL),
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loop_nesting_(0),
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function_return_is_shadowed_(false),
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in_spilled_code_(false) {
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}
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2009-06-10 09:48:15 +00:00
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#define __ ACCESS_MASM(masm)
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2009-06-04 11:54:14 +00:00
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2009-05-20 13:20:02 +00:00
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void CodeGenerator::DeclareGlobals(Handle<FixedArray> a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::GenCode(FunctionLiteral* a) {
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masm_->int3(); // UNIMPLEMENTED
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}
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void CodeGenerator::GenerateFastCaseSwitchJumpTable(SwitchStatement* a,
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int b,
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int c,
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Label* d,
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Vector<Label*> e,
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Vector<Label> f) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitStatements(ZoneList<Statement*>* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitBlock(Block* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitDeclaration(Declaration* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitExpressionStatement(ExpressionStatement* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitEmptyStatement(EmptyStatement* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitIfStatement(IfStatement* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitContinueStatement(ContinueStatement* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitBreakStatement(BreakStatement* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitReturnStatement(ReturnStatement* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitWithEnterStatement(WithEnterStatement* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitWithExitStatement(WithExitStatement* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitSwitchStatement(SwitchStatement* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitLoopStatement(LoopStatement* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitForInStatement(ForInStatement* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitTryCatch(TryCatch* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitTryFinally(TryFinally* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitDebuggerStatement(DebuggerStatement* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitFunctionLiteral(FunctionLiteral* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitFunctionBoilerplateLiteral(
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FunctionBoilerplateLiteral* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitConditional(Conditional* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitSlot(Slot* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitVariableProxy(VariableProxy* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitLiteral(Literal* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitRegExpLiteral(RegExpLiteral* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitObjectLiteral(ObjectLiteral* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitArrayLiteral(ArrayLiteral* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitCatchExtensionObject(CatchExtensionObject* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitAssignment(Assignment* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitThrow(Throw* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitProperty(Property* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitCall(Call* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitCallEval(CallEval* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitCallNew(CallNew* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitCallRuntime(CallRuntime* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitUnaryOperation(UnaryOperation* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitCountOperation(CountOperation* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitBinaryOperation(BinaryOperation* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitCompareOperation(CompareOperation* a) {
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UNIMPLEMENTED();
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}
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void CodeGenerator::VisitThisFunction(ThisFunction* a) {
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UNIMPLEMENTED();
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}
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2009-06-10 09:48:15 +00:00
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void CEntryStub::GenerateThrowTOS(MacroAssembler* masm) {
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// Check that stack should contain frame pointer, code pointer, state and
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// return address in that order.
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ASSERT_EQ(StackHandlerConstants::kFPOffset + kPointerSize,
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StackHandlerConstants::kStateOffset);
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ASSERT_EQ(StackHandlerConstants::kStateOffset + kPointerSize,
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StackHandlerConstants::kPCOffset);
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ExternalReference handler_address(Top::k_handler_address);
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__ movq(kScratchRegister, handler_address);
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__ movq(rdx, Operand(kScratchRegister, 0));
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// get next in chain
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__ movq(rcx, Operand(rdx, 0));
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__ movq(Operand(kScratchRegister, 0), rcx);
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__ movq(rsp, rdx);
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__ pop(rbp); // pop frame pointer
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__ pop(rdx); // remove code pointer
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__ pop(rdx); // remove state
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// Before returning we restore the context from the frame pointer if not NULL.
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// The frame pointer is NULL in the exception handler of a JS entry frame.
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__ xor_(rsi, rsi); // tentatively set context pointer to NULL
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Label skip;
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2009-06-10 15:53:46 +00:00
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__ cmpq(rbp, Immediate(0));
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2009-06-10 09:48:15 +00:00
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__ j(equal, &skip);
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__ movq(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
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__ bind(&skip);
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__ ret(0);
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}
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void CEntryStub::GenerateCore(MacroAssembler* masm,
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Label* throw_normal_exception,
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Label* throw_out_of_memory_exception,
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StackFrame::Type frame_type,
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bool do_gc,
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bool always_allocate_scope) {
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// rax: result parameter for PerformGC, if any
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// rbx: pointer to C function (C callee-saved)
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// rbp: frame pointer (restored after C call)
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// rsp: stack pointer (restored after C call)
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// rdi: number of arguments including receiver (C callee-saved)
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// rsi: pointer to the first argument (C callee-saved)
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if (do_gc) {
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__ movq(Operand(rsp, 0), rax); // Result.
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__ movq(kScratchRegister,
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FUNCTION_ADDR(Runtime::PerformGC),
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RelocInfo::RUNTIME_ENTRY);
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__ call(kScratchRegister);
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}
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ExternalReference scope_depth =
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ExternalReference::heap_always_allocate_scope_depth();
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if (always_allocate_scope) {
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__ movq(kScratchRegister, scope_depth);
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2009-06-10 15:53:46 +00:00
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__ incl(Operand(kScratchRegister, 0));
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2009-06-10 09:48:15 +00:00
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}
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// Call C function.
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#ifdef __MSVC__
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// MSVC passes arguments in rcx, rdx, r8, r9
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__ movq(rcx, rdi); // argc.
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__ movq(rdx, rsi); // argv.
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#else // ! defined(__MSVC__)
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// GCC passes arguments in rdi, rsi, rdx, rcx, r8, r9.
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// First two arguments are already in rdi, rsi.
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#endif
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__ call(rbx);
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// Result is in rax - do not destroy this register!
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if (always_allocate_scope) {
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__ movq(kScratchRegister, scope_depth);
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2009-06-10 15:53:46 +00:00
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__ decl(Operand(kScratchRegister, 0));
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2009-06-10 09:48:15 +00:00
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}
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// Check for failure result.
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Label failure_returned;
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ASSERT(((kFailureTag + 1) & kFailureTagMask) == 0);
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__ lea(rcx, Operand(rax, 1));
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// Lower 2 bits of rcx are 0 iff rax has failure tag.
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__ testl(rcx, Immediate(kFailureTagMask));
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__ j(zero, &failure_returned);
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// Exit the JavaScript to C++ exit frame.
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__ LeaveExitFrame(frame_type);
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__ ret(0);
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// Handling of failure.
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__ bind(&failure_returned);
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Label retry;
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// If the returned exception is RETRY_AFTER_GC continue at retry label
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ASSERT(Failure::RETRY_AFTER_GC == 0);
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__ testq(rax, Immediate(((1 << kFailureTypeTagSize) - 1) << kFailureTagSize));
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__ j(zero, &retry);
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Label continue_exception;
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// If the returned failure is EXCEPTION then promote Top::pending_exception().
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__ movq(kScratchRegister, Failure::Exception(), RelocInfo::NONE);
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2009-06-10 15:53:46 +00:00
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__ cmpq(rax, kScratchRegister);
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2009-06-10 09:48:15 +00:00
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__ j(not_equal, &continue_exception);
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// Retrieve the pending exception and clear the variable.
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ExternalReference pending_exception_address(Top::k_pending_exception_address);
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__ movq(kScratchRegister, pending_exception_address);
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__ movq(rax, Operand(kScratchRegister, 0));
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__ movq(rdx, ExternalReference::the_hole_value_location());
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__ movq(rdx, Operand(rdx, 0));
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__ movq(Operand(kScratchRegister, 0), rdx);
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__ bind(&continue_exception);
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// Special handling of out of memory exception.
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__ movq(kScratchRegister, Failure::OutOfMemoryException(), RelocInfo::NONE);
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2009-06-10 15:53:46 +00:00
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__ cmpq(rax, kScratchRegister);
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2009-06-10 09:48:15 +00:00
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__ j(equal, throw_out_of_memory_exception);
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// Handle normal exception.
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__ jmp(throw_normal_exception);
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// Retry.
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__ bind(&retry);
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}
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void CEntryStub::GenerateThrowOutOfMemory(MacroAssembler* masm) {
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// Fetch top stack handler.
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ExternalReference handler_address(Top::k_handler_address);
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__ movq(kScratchRegister, handler_address);
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__ movq(rdx, Operand(kScratchRegister, 0));
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// Unwind the handlers until the ENTRY handler is found.
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Label loop, done;
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__ bind(&loop);
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// Load the type of the current stack handler.
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2009-06-10 15:53:46 +00:00
|
|
|
__ cmpq(Operand(rdx, StackHandlerConstants::kStateOffset),
|
2009-06-10 09:48:15 +00:00
|
|
|
Immediate(StackHandler::ENTRY));
|
|
|
|
__ j(equal, &done);
|
|
|
|
// Fetch the next handler in the list.
|
|
|
|
__ movq(rdx, Operand(rdx, StackHandlerConstants::kNextOffset));
|
|
|
|
__ jmp(&loop);
|
|
|
|
__ bind(&done);
|
|
|
|
|
|
|
|
// Set the top handler address to next handler past the current ENTRY handler.
|
|
|
|
__ movq(rax, Operand(rdx, StackHandlerConstants::kNextOffset));
|
|
|
|
__ store_rax(handler_address);
|
|
|
|
|
|
|
|
// Set external caught exception to false.
|
|
|
|
__ movq(rax, Immediate(false));
|
|
|
|
ExternalReference external_caught(Top::k_external_caught_exception_address);
|
|
|
|
__ store_rax(external_caught);
|
|
|
|
|
|
|
|
// Set pending exception and rax to out of memory exception.
|
|
|
|
__ movq(rax, Failure::OutOfMemoryException(), RelocInfo::NONE);
|
|
|
|
ExternalReference pending_exception(Top::k_pending_exception_address);
|
|
|
|
__ store_rax(pending_exception);
|
|
|
|
|
|
|
|
// Restore the stack to the address of the ENTRY handler
|
|
|
|
__ movq(rsp, rdx);
|
|
|
|
|
|
|
|
// Clear the context pointer;
|
|
|
|
__ xor_(rsi, rsi);
|
|
|
|
|
|
|
|
// Restore registers from handler.
|
|
|
|
|
|
|
|
__ pop(rbp); // FP
|
|
|
|
ASSERT_EQ(StackHandlerConstants::kFPOffset + kPointerSize,
|
|
|
|
StackHandlerConstants::kStateOffset);
|
|
|
|
__ pop(rdx); // State
|
|
|
|
|
|
|
|
ASSERT_EQ(StackHandlerConstants::kStateOffset + kPointerSize,
|
|
|
|
StackHandlerConstants::kPCOffset);
|
|
|
|
__ ret(0);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2009-05-20 13:20:02 +00:00
|
|
|
void CEntryStub::GenerateBody(MacroAssembler* masm, bool is_debug_break) {
|
2009-06-10 09:48:15 +00:00
|
|
|
// rax: number of arguments including receiver
|
|
|
|
// rbx: pointer to C function (C callee-saved)
|
|
|
|
// rbp: frame pointer (restored after C call)
|
|
|
|
// rsp: stack pointer (restored after C call)
|
|
|
|
// rsi: current context (C callee-saved)
|
|
|
|
// rdi: caller's parameter pointer pp (C callee-saved)
|
|
|
|
|
|
|
|
// NOTE: Invocations of builtins may return failure objects
|
|
|
|
// instead of a proper result. The builtin entry handles
|
|
|
|
// this by performing a garbage collection and retrying the
|
|
|
|
// builtin once.
|
|
|
|
|
|
|
|
StackFrame::Type frame_type = is_debug_break ?
|
|
|
|
StackFrame::EXIT_DEBUG :
|
|
|
|
StackFrame::EXIT;
|
|
|
|
|
|
|
|
// Enter the exit frame that transitions from JavaScript to C++.
|
|
|
|
__ EnterExitFrame(frame_type);
|
|
|
|
|
|
|
|
// rax: result parameter for PerformGC, if any (setup below)
|
|
|
|
// rbx: pointer to builtin function (C callee-saved)
|
|
|
|
// rbp: frame pointer (restored after C call)
|
|
|
|
// rsp: stack pointer (restored after C call)
|
|
|
|
// rdi: number of arguments including receiver (C callee-saved)
|
|
|
|
// rsi: argv pointer (C callee-saved)
|
|
|
|
|
|
|
|
Label throw_out_of_memory_exception;
|
|
|
|
Label throw_normal_exception;
|
|
|
|
|
|
|
|
// Call into the runtime system. Collect garbage before the call if
|
|
|
|
// running with --gc-greedy set.
|
|
|
|
if (FLAG_gc_greedy) {
|
|
|
|
Failure* failure = Failure::RetryAfterGC(0);
|
|
|
|
__ movq(rax, failure, RelocInfo::NONE);
|
|
|
|
}
|
|
|
|
GenerateCore(masm, &throw_normal_exception,
|
|
|
|
&throw_out_of_memory_exception,
|
|
|
|
frame_type,
|
|
|
|
FLAG_gc_greedy,
|
|
|
|
false);
|
|
|
|
|
|
|
|
// Do space-specific GC and retry runtime call.
|
|
|
|
GenerateCore(masm,
|
|
|
|
&throw_normal_exception,
|
|
|
|
&throw_out_of_memory_exception,
|
|
|
|
frame_type,
|
|
|
|
true,
|
|
|
|
false);
|
|
|
|
|
|
|
|
// Do full GC and retry runtime call one final time.
|
|
|
|
Failure* failure = Failure::InternalError();
|
|
|
|
__ movq(rax, failure, RelocInfo::NONE);
|
|
|
|
GenerateCore(masm,
|
|
|
|
&throw_normal_exception,
|
|
|
|
&throw_out_of_memory_exception,
|
|
|
|
frame_type,
|
|
|
|
true,
|
|
|
|
true);
|
|
|
|
|
|
|
|
__ bind(&throw_out_of_memory_exception);
|
|
|
|
GenerateThrowOutOfMemory(masm);
|
|
|
|
// control flow for generated will not return.
|
|
|
|
|
|
|
|
__ bind(&throw_normal_exception);
|
|
|
|
GenerateThrowTOS(masm);
|
2009-05-20 13:20:02 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2009-06-04 11:54:14 +00:00
|
|
|
void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
|
|
|
|
Label invoke, exit;
|
|
|
|
|
|
|
|
// Setup frame.
|
|
|
|
__ push(rbp);
|
|
|
|
__ movq(rbp, rsp);
|
|
|
|
|
|
|
|
// Save callee-saved registers (X64 calling conventions).
|
|
|
|
int marker = is_construct ? StackFrame::ENTRY_CONSTRUCT : StackFrame::ENTRY;
|
|
|
|
// Push something that is not an arguments adaptor.
|
|
|
|
__ push(Immediate(ArgumentsAdaptorFrame::NON_SENTINEL));
|
|
|
|
__ push(Immediate(Smi::FromInt(marker))); // @ function offset
|
|
|
|
__ push(r12);
|
|
|
|
__ push(r13);
|
|
|
|
__ push(r14);
|
|
|
|
__ push(r15);
|
|
|
|
__ push(rdi);
|
|
|
|
__ push(rsi);
|
|
|
|
__ push(rbx);
|
|
|
|
// TODO(X64): Push XMM6-XMM15 (low 64 bits) as well, or make them
|
|
|
|
// callee-save in JS code as well.
|
|
|
|
|
|
|
|
// Save copies of the top frame descriptor on the stack.
|
|
|
|
ExternalReference c_entry_fp(Top::k_c_entry_fp_address);
|
|
|
|
__ load_rax(c_entry_fp);
|
|
|
|
__ push(rax);
|
|
|
|
|
|
|
|
// Call a faked try-block that does the invoke.
|
|
|
|
__ call(&invoke);
|
|
|
|
|
|
|
|
// Caught exception: Store result (exception) in the pending
|
|
|
|
// exception field in the JSEnv and return a failure sentinel.
|
|
|
|
ExternalReference pending_exception(Top::k_pending_exception_address);
|
|
|
|
__ store_rax(pending_exception);
|
|
|
|
__ movq(rax, Failure::Exception(), RelocInfo::NONE);
|
|
|
|
__ jmp(&exit);
|
|
|
|
|
|
|
|
// Invoke: Link this frame into the handler chain.
|
|
|
|
__ bind(&invoke);
|
|
|
|
__ PushTryHandler(IN_JS_ENTRY, JS_ENTRY_HANDLER);
|
|
|
|
|
|
|
|
// Clear any pending exceptions.
|
|
|
|
__ load_rax(ExternalReference::the_hole_value_location());
|
|
|
|
__ store_rax(pending_exception);
|
|
|
|
|
|
|
|
// Fake a receiver (NULL).
|
|
|
|
__ push(Immediate(0)); // receiver
|
|
|
|
|
|
|
|
// Invoke the function by calling through JS entry trampoline
|
|
|
|
// builtin and pop the faked function when we return. We load the address
|
|
|
|
// from an external reference instead of inlining the call target address
|
|
|
|
// directly in the code, because the builtin stubs may not have been
|
|
|
|
// generated yet at the time this code is generated.
|
|
|
|
if (is_construct) {
|
|
|
|
ExternalReference construct_entry(Builtins::JSConstructEntryTrampoline);
|
|
|
|
__ load_rax(construct_entry);
|
|
|
|
} else {
|
|
|
|
ExternalReference entry(Builtins::JSEntryTrampoline);
|
|
|
|
__ load_rax(entry);
|
|
|
|
}
|
|
|
|
__ call(FieldOperand(rax, Code::kHeaderSize));
|
|
|
|
|
|
|
|
// Unlink this frame from the handler chain.
|
|
|
|
__ movq(kScratchRegister, ExternalReference(Top::k_handler_address));
|
|
|
|
__ pop(Operand(kScratchRegister, 0));
|
|
|
|
// Pop next_sp.
|
2009-06-10 15:53:46 +00:00
|
|
|
__ addq(rsp, Immediate(StackHandlerConstants::kSize - kPointerSize));
|
2009-06-04 11:54:14 +00:00
|
|
|
|
|
|
|
// Restore the top frame descriptor from the stack.
|
|
|
|
__ bind(&exit);
|
|
|
|
__ movq(kScratchRegister, ExternalReference(Top::k_c_entry_fp_address));
|
|
|
|
__ pop(Operand(kScratchRegister, 0));
|
|
|
|
|
|
|
|
// Restore callee-saved registers (X64 conventions).
|
|
|
|
__ pop(rbx);
|
|
|
|
__ pop(rsi);
|
|
|
|
__ pop(rdi);
|
|
|
|
__ pop(r15);
|
|
|
|
__ pop(r14);
|
|
|
|
__ pop(r13);
|
|
|
|
__ pop(r12);
|
2009-06-10 15:53:46 +00:00
|
|
|
__ addq(rsp, Immediate(2 * kPointerSize)); // remove markers
|
2009-06-04 11:54:14 +00:00
|
|
|
|
|
|
|
// Restore frame pointer and return.
|
|
|
|
__ pop(rbp);
|
|
|
|
__ ret(0);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
#undef __
|
2009-05-20 13:20:02 +00:00
|
|
|
|
|
|
|
} } // namespace v8::internal
|