1// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
2// for details. All rights reserved. Use of this source code is governed by a
3// BSD-style license that can be found in the LICENSE file.
4
5#include "vm/globals.h"
6#if defined(TARGET_ARCH_X64)
7
8#include "vm/debugger.h"
9
10#include "vm/code_patcher.h"
11#include "vm/cpu.h"
12#include "vm/instructions.h"
13#include "vm/stub_code.h"
14
15namespace dart {
16
17#ifndef PRODUCT
18
19CodePtr CodeBreakpoint::OrigStubAddress() const {
20 return saved_value_;
21}
22
23void CodeBreakpoint::PatchCode() {
24 ASSERT(!is_enabled_);
25 Code& stub_target = Code::Handle();
26 switch (breakpoint_kind_) {
27 case PcDescriptorsLayout::kIcCall:
28 stub_target = StubCode::ICCallBreakpoint().raw();
29 break;
30 case PcDescriptorsLayout::kUnoptStaticCall:
31 stub_target = StubCode::UnoptStaticCallBreakpoint().raw();
32 break;
33 case PcDescriptorsLayout::kRuntimeCall:
34 stub_target = StubCode::RuntimeCallBreakpoint().raw();
35 break;
36 default:
37 UNREACHABLE();
38 }
39 const Code& code = Code::Handle(code_);
40 saved_value_ = CodePatcher::GetStaticCallTargetAt(pc_, code);
41 CodePatcher::PatchPoolPointerCallAt(pc_, code, stub_target);
42 is_enabled_ = true;
43}
44
45void CodeBreakpoint::RestoreCode() {
46 ASSERT(is_enabled_);
47 const Code& code = Code::Handle(code_);
48 switch (breakpoint_kind_) {
49 case PcDescriptorsLayout::kIcCall:
50 case PcDescriptorsLayout::kUnoptStaticCall:
51 case PcDescriptorsLayout::kRuntimeCall: {
52 CodePatcher::PatchPoolPointerCallAt(pc_, code,
53 Code::Handle(saved_value_));
54 break;
55 }
56 default:
57 UNREACHABLE();
58 }
59 is_enabled_ = false;
60}
61
62#endif // !PRODUCT
63
64} // namespace dart
65
66#endif // defined TARGET_ARCH_X64
67