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// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#include "vm/globals.h"
#if defined(TARGET_ARCH_X64)
#include "vm/debugger.h"
#include "vm/code_patcher.h"
#include "vm/cpu.h"
#include "vm/instructions.h"
#include "vm/stub_code.h"
namespace dart {
#ifndef PRODUCT
CodePtr CodeBreakpoint::OrigStubAddress() const {
return saved_value_;
}
void CodeBreakpoint::PatchCode() {
ASSERT(!is_enabled_);
Code& stub_target = Code::Handle();
switch (breakpoint_kind_) {
case PcDescriptorsLayout::kIcCall:
stub_target = StubCode::ICCallBreakpoint().raw();
break;
case PcDescriptorsLayout::kUnoptStaticCall:
stub_target = StubCode::UnoptStaticCallBreakpoint().raw();
break;
case PcDescriptorsLayout::kRuntimeCall:
stub_target = StubCode::RuntimeCallBreakpoint().raw();
break;
default:
UNREACHABLE();
}
const Code& code = Code::Handle(code_);
saved_value_ = CodePatcher::GetStaticCallTargetAt(pc_, code);
CodePatcher::PatchPoolPointerCallAt(pc_, code, stub_target);
is_enabled_ = true;
}
void CodeBreakpoint::RestoreCode() {
ASSERT(is_enabled_);
const Code& code = Code::Handle(code_);
switch (breakpoint_kind_) {
case PcDescriptorsLayout::kIcCall:
case PcDescriptorsLayout::kUnoptStaticCall:
case PcDescriptorsLayout::kRuntimeCall: {
CodePatcher::PatchPoolPointerCallAt(pc_, code,
Code::Handle(saved_value_));
break;
}
default:
UNREACHABLE();
}
is_enabled_ = false;
}
#endif // !PRODUCT
} // namespace dart
#endif // defined TARGET_ARCH_X64