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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_IA32)
#include "vm/debugger.h"
#include "vm/code_patcher.h"
#include "vm/compiler/assembler/disassembler.h"
#include "vm/cpu.h"
#include "vm/object.h"
#include "vm/os.h"
#include "vm/stack_frame.h"
#include "vm/stub_code.h"
namespace dart {
#ifndef PRODUCT
CodePtr CodeBreakpoint::OrigStubAddress() const {
return saved_value_;
}
void CodeBreakpoint::PatchCode() {
ASSERT(!IsEnabled());
auto thread = Thread::Current();
auto zone = thread->zone();
const Code& code = Code::Handle(zone, code_);
const Instructions& instrs = Instructions::Handle(zone, code.instructions());
Code& stub_target = Code::Handle(zone);
thread->isolate_group()->RunWithStoppedMutators([&]() {
WritableInstructionsScope writable(instrs.PayloadStart(), instrs.Size());
switch (breakpoint_kind_) {
case UntaggedPcDescriptors::kIcCall: {
stub_target = StubCode::ICCallBreakpoint().ptr();
break;
}
case UntaggedPcDescriptors::kUnoptStaticCall: {
stub_target = StubCode::UnoptStaticCallBreakpoint().ptr();
break;
}
case UntaggedPcDescriptors::kRuntimeCall: {
saved_value_ = CodePatcher::GetStaticCallTargetAt(pc_, code);
stub_target = StubCode::RuntimeCallBreakpoint().ptr();
break;
}
default:
UNREACHABLE();
}
saved_value_ = CodePatcher::GetStaticCallTargetAt(pc_, code);
CodePatcher::PatchStaticCallAt(pc_, code, stub_target);
});
}
void CodeBreakpoint::RestoreCode() {
ASSERT(IsEnabled());
auto thread = Thread::Current();
auto zone = thread->zone();
const Code& code = Code::Handle(zone, code_);
const Instructions& instrs = Instructions::Handle(zone, code.instructions());
thread->isolate_group()->RunWithStoppedMutators([&]() {
WritableInstructionsScope writable(instrs.PayloadStart(), instrs.Size());
switch (breakpoint_kind_) {
case UntaggedPcDescriptors::kIcCall:
case UntaggedPcDescriptors::kUnoptStaticCall:
case UntaggedPcDescriptors::kRuntimeCall: {
CodePatcher::PatchStaticCallAt(pc_, code, Code::Handle(saved_value_));
break;
}
default:
UNREACHABLE();
}
});
}
#endif // !PRODUCT
} // namespace dart
#endif // defined TARGET_ARCH_IA32