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// Copyright (c) 2021, 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_RISCV32) || defined(TARGET_ARCH_RISCV64)
#include "vm/code_patcher.h"
#include "vm/cpu.h"
#include "vm/debugger.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());
const Code& code = Code::Handle(code_);
switch (breakpoint_kind_) {
case UntaggedPcDescriptors::kIcCall: {
Object& data = Object::Handle();
saved_value_ = CodePatcher::GetInstanceCallAt(pc_, code, &data);
CodePatcher::PatchInstanceCallAt(pc_, code, data,
StubCode::ICCallBreakpoint());
break;
}
case UntaggedPcDescriptors::kUnoptStaticCall: {
saved_value_ = CodePatcher::GetStaticCallTargetAt(pc_, code);
CodePatcher::PatchPoolPointerCallAt(
pc_, code, StubCode::UnoptStaticCallBreakpoint());
break;
}
case UntaggedPcDescriptors::kRuntimeCall: {
saved_value_ = CodePatcher::GetStaticCallTargetAt(pc_, code);
CodePatcher::PatchPoolPointerCallAt(pc_, code,
StubCode::RuntimeCallBreakpoint());
break;
}
default:
UNREACHABLE();
}
}
void CodeBreakpoint::RestoreCode() {
ASSERT(IsEnabled());
const Code& code = Code::Handle(code_);
switch (breakpoint_kind_) {
case UntaggedPcDescriptors::kIcCall: {
Object& data = Object::Handle();
CodePatcher::GetInstanceCallAt(pc_, code, &data);
CodePatcher::PatchInstanceCallAt(pc_, code, data,
Code::Handle(saved_value_));
break;
}
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_RISCV