src/v8/src/debug/ia32/debug-ia32.cc

// 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) {
  {
    FrameScope scope(masm, StackFrame::INTERNAL);
    __ CallRuntime(Runtime::kHandleDebuggerStatement, 0);
  }
  __ MaybeDropFrames();

  // Return to caller.
  __ ret(0);
}

void DebugCodegen::GenerateFrameDropperTrampoline(MacroAssembler* masm) {
  // Frame is being dropped:
  // - Drop to the target frame specified by ebx.
  // - Look up current function on the frame.
  // - Leave the frame.
  // - Restart the frame by calling the function.
  __ mov(ebp, ebx);
  __ mov(edi, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
  __ leave();

  __ mov(ebx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
  __ mov(ebx,
         FieldOperand(ebx, SharedFunctionInfo::kFormalParameterCountOffset));

  ParameterCount dummy(ebx);
  __ InvokeFunction(edi, dummy, dummy, JUMP_FUNCTION);
}


const bool LiveEdit::kFrameDropperSupported = true;

#undef __

}  // namespace internal
}  // namespace v8

#endif  // V8_TARGET_ARCH_IA32