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_ARM)
7
8#include "vm/code_patcher.h"
9#include "vm/cpu.h"
10#include "vm/debugger.h"
11#include "vm/instructions.h"
12#include "vm/stub_code.h"
13
14namespace dart {
15
16#ifndef PRODUCT
17
18CodePtr CodeBreakpoint::OrigStubAddress() const {
19 return saved_value_;
20}
21
22void CodeBreakpoint::PatchCode() {
23 ASSERT(!is_enabled_);
24 Code& stub_target = Code::Handle();
25 switch (breakpoint_kind_) {
26 case PcDescriptorsLayout::kIcCall:
27 stub_target = StubCode::ICCallBreakpoint().raw();
28 break;
29 case PcDescriptorsLayout::kUnoptStaticCall:
30 stub_target = StubCode::UnoptStaticCallBreakpoint().raw();
31 break;
32 case PcDescriptorsLayout::kRuntimeCall:
33 stub_target = StubCode::RuntimeCallBreakpoint().raw();
34 break;
35 default:
36 UNREACHABLE();
37 }
38 const Code& code = Code::Handle(code_);
39 saved_value_ = CodePatcher::GetStaticCallTargetAt(pc_, code);
40 CodePatcher::PatchStaticCallAt(pc_, code, stub_target);
41 is_enabled_ = true;
42}
43
44void CodeBreakpoint::RestoreCode() {
45 ASSERT(is_enabled_);
46 const Code& code = Code::Handle(code_);
47 switch (breakpoint_kind_) {
48 case PcDescriptorsLayout::kIcCall:
49 case PcDescriptorsLayout::kUnoptStaticCall:
50 case PcDescriptorsLayout::kRuntimeCall: {
51 CodePatcher::PatchStaticCallAt(pc_, code, Code::Handle(saved_value_));
52 break;
53 }
54 default:
55 UNREACHABLE();
56 }
57 is_enabled_ = false;
58}
59
60#endif // !PRODUCT
61
62} // namespace dart
63
64#endif // defined TARGET_ARCH_ARM
65