Florian Schneider
63a8e5227d
This makes the code in the code generator independent from how stubs are actually called (i.e. directly embedding the target address, or indirectly by loading the target address from the code object). BUG= R=rmacnak@google.com Review URL: https://codereview.chromium.org//1270803003 .
61 lines
1.6 KiB
C++
61 lines
1.6 KiB
C++
// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "vm/globals.h"
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#if defined(TARGET_ARCH_ARM)
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#include "vm/code_patcher.h"
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#include "vm/cpu.h"
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#include "vm/debugger.h"
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#include "vm/instructions.h"
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#include "vm/stub_code.h"
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namespace dart {
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uword CodeBreakpoint::OrigStubAddress() const {
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return saved_value_;
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}
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void CodeBreakpoint::PatchCode() {
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ASSERT(!is_enabled_);
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uword stub_target = 0;
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switch (breakpoint_kind_) {
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case RawPcDescriptors::kIcCall:
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case RawPcDescriptors::kUnoptStaticCall:
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stub_target = StubCode::ICCallBreakpoint_entry()->EntryPoint();
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break;
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case RawPcDescriptors::kRuntimeCall:
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stub_target = StubCode::RuntimeCallBreakpoint_entry()->EntryPoint();
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break;
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default:
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UNREACHABLE();
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}
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const Code& code = Code::Handle(code_);
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saved_value_ = CodePatcher::GetStaticCallTargetAt(pc_, code);
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CodePatcher::PatchStaticCallAt(pc_, code, stub_target);
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is_enabled_ = true;
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}
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void CodeBreakpoint::RestoreCode() {
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ASSERT(is_enabled_);
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const Code& code = Code::Handle(code_);
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switch (breakpoint_kind_) {
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case RawPcDescriptors::kIcCall:
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case RawPcDescriptors::kUnoptStaticCall:
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case RawPcDescriptors::kRuntimeCall: {
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CodePatcher::PatchStaticCallAt(pc_, code, saved_value_);
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break;
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}
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default:
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UNREACHABLE();
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}
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is_enabled_ = false;
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}
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} // namespace dart
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#endif // defined TARGET_ARCH_ARM
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