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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_X64
#include "src/debug/debug.h"
#include "src/assembler.h"
#include "src/debug/liveedit.h"
#include "src/frames-inl.h"
#include "src/macro-assembler.h"
#include "src/objects-inl.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 rbx.
// - Look up current function on the frame.
// - Leave the frame.
// - Restart the frame by calling the function.
Register decompr_scratch_for_debug =
COMPRESS_POINTERS_BOOL ? kScratchRegister : no_reg;
__ movp(rbp, rbx);
__ movp(rdi, Operand(rbp, JavaScriptFrameConstants::kFunctionOffset));
__ leave();
__ LoadTaggedPointerField(
rbx, FieldOperand(rdi, JSFunction::kSharedFunctionInfoOffset),
decompr_scratch_for_debug);
__ movzxwq(
rbx, FieldOperand(rbx, SharedFunctionInfo::kFormalParameterCountOffset));
ParameterCount dummy(rbx);
__ InvokeFunction(rdi, no_reg, dummy, dummy, JUMP_FUNCTION);
}
const bool LiveEdit::kFrameDropperSupported = true;
#undef __
} // namespace internal
} // namespace v8
#endif // V8_TARGET_ARCH_X64
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