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// Copyright 2012 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#if V8_TARGET_ARCH_IA32
#include "src/debug/debug.h"
#include "src/debug/liveedit.h"
#include "src/frames-inl.h"
#include "src/macro-assembler.h"
namespace v8 {
namespace internal {
#define __ ACCESS_MASM(masm)
void DebugCodegen::GenerateHandleDebuggerStatement(MacroAssembler* masm) {
Assembler::SupportsRootRegisterScope supports_root_register(masm);
{
FrameScope scope(masm, StackFrame::INTERNAL);
__ CallRuntime(Runtime::kHandleDebuggerStatement, 0);
}
__ MaybeDropFrames();
// Return to caller.
__ ret(0);
}
void DebugCodegen::GenerateFrameDropperTrampoline(MacroAssembler* masm) {
Assembler::SupportsRootRegisterScope supports_root_register(masm);
// Frame is being dropped:
// - Drop to the target frame specified by eax.
// - Look up current function on the frame.
// - Leave the frame.
// - Restart the frame by calling the function.
__ mov(ebp, eax);
__ mov(edi, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
__ leave();
__ mov(eax, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
__ movzx_w(
eax, FieldOperand(eax, SharedFunctionInfo::kFormalParameterCountOffset));
// The expected and actual argument counts don't matter as long as they match
// and we don't enter the ArgumentsAdaptorTrampoline.
ParameterCount dummy(0);
__ mov(esi, FieldOperand(edi, JSFunction::kContextOffset));
__ InvokeFunctionCode(edi, no_reg, dummy, dummy, JUMP_FUNCTION);
}
const bool LiveEdit::kFrameDropperSupported = true;
#undef __
} // namespace internal
} // namespace v8
#endif // V8_TARGET_ARCH_IA32
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