debugger_x64.cc

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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(!IsEnabled());
  Code& stub_target = Code::Handle();
  switch (breakpoint_kind_) {
    case UntaggedPcDescriptors::kIcCall:
      stub_target = StubCode::ICCallBreakpoint().ptr();
      break;
    case UntaggedPcDescriptors::kUnoptStaticCall:
      stub_target = StubCode::UnoptStaticCallBreakpoint().ptr();
      break;
    case UntaggedPcDescriptors::kRuntimeCall:
      stub_target = StubCode::RuntimeCallBreakpoint().ptr();
      break;
    default:
      UNREACHABLE();
  }
  const Code& code = Code::Handle(code_);
  saved_value_ = CodePatcher::GetStaticCallTargetAt(pc_, code);
  CodePatcher::PatchPoolPointerCallAt(pc_, code, stub_target);
}
 
void CodeBreakpoint::RestoreCode() {
  ASSERT(IsEnabled());
  const Code& code = Code::Handle(code_);
  switch (breakpoint_kind_) {
    case UntaggedPcDescriptors::kIcCall:
    case UntaggedPcDescriptors::kUnoptStaticCall:
    case UntaggedPcDescriptors::kRuntimeCall: {
      CodePatcher::PatchPoolPointerCallAt(pc_, code,
                                          Code::Handle(saved_value_));
      break;
    }
    default:
      UNREACHABLE();
  }
}
 
#endif  // !PRODUCT
 
}  // namespace dart
 
#endif  // defined TARGET_ARCH_X64