mirror of
https://github.com/dart-lang/sdk
synced 2024-09-20 04:31:31 +00:00
6fe15f6df9
This works around bugs in UndefinedBehaviorSanitizer and Clang. Bug: b/28638298 Change-Id: I6be595f9664516019d28017d24559583a1ae3a21 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/144354 Commit-Queue: Ryan Macnak <rmacnak@google.com> Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
65 lines
1.7 KiB
C++
65 lines
1.7 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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#ifndef PRODUCT
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CodePtr 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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Code& stub_target = Code::Handle();
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switch (breakpoint_kind_) {
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case PcDescriptorsLayout::kIcCall:
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stub_target = StubCode::ICCallBreakpoint().raw();
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break;
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case PcDescriptorsLayout::kUnoptStaticCall:
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stub_target = StubCode::UnoptStaticCallBreakpoint().raw();
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break;
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case PcDescriptorsLayout::kRuntimeCall:
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stub_target = StubCode::RuntimeCallBreakpoint().raw();
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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 PcDescriptorsLayout::kIcCall:
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case PcDescriptorsLayout::kUnoptStaticCall:
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case PcDescriptorsLayout::kRuntimeCall: {
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CodePatcher::PatchStaticCallAt(pc_, code, Code::Handle(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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#endif // !PRODUCT
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} // namespace dart
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#endif // defined TARGET_ARCH_ARM
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