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/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ART_RUNTIME_TRANSACTION_H_
#define ART_RUNTIME_TRANSACTION_H_
#include "base/macros.h"
#include "base/mutex.h"
#include "base/value_object.h"
#include "gc_root.h"
#include "object_callbacks.h"
#include "offsets.h"
#include "primitive.h"
#include "safe_map.h"
#include <list>
#include <map>
namespace art {
namespace mirror {
class Array;
class Object;
class String;
}
class InternTable;
class Transaction FINAL {
public:
static constexpr const char* kAbortExceptionDescriptor = "dalvik.system.TransactionAbortError";
static constexpr const char* kAbortExceptionSignature = "Ldalvik/system/TransactionAbortError;";
Transaction();
~Transaction();
void Abort(const std::string& abort_message)
LOCKS_EXCLUDED(log_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void ThrowAbortError(Thread* self, const std::string* abort_message)
LOCKS_EXCLUDED(log_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
bool IsAborted() LOCKS_EXCLUDED(log_lock_);
// Record object field changes.
void RecordWriteFieldBoolean(mirror::Object* obj, MemberOffset field_offset, uint8_t value,
bool is_volatile)
LOCKS_EXCLUDED(log_lock_);
void RecordWriteFieldByte(mirror::Object* obj, MemberOffset field_offset, int8_t value,
bool is_volatile)
LOCKS_EXCLUDED(log_lock_);
void RecordWriteFieldChar(mirror::Object* obj, MemberOffset field_offset, uint16_t value,
bool is_volatile)
LOCKS_EXCLUDED(log_lock_);
void RecordWriteFieldShort(mirror::Object* obj, MemberOffset field_offset, int16_t value,
bool is_volatile)
LOCKS_EXCLUDED(log_lock_);
void RecordWriteField32(mirror::Object* obj, MemberOffset field_offset, uint32_t value,
bool is_volatile)
LOCKS_EXCLUDED(log_lock_);
void RecordWriteField64(mirror::Object* obj, MemberOffset field_offset, uint64_t value,
bool is_volatile)
LOCKS_EXCLUDED(log_lock_);
void RecordWriteFieldReference(mirror::Object* obj, MemberOffset field_offset,
mirror::Object* value, bool is_volatile)
LOCKS_EXCLUDED(log_lock_);
// Record array change.
void RecordWriteArray(mirror::Array* array, size_t index, uint64_t value)
LOCKS_EXCLUDED(log_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Record intern string table changes.
void RecordStrongStringInsertion(mirror::String* s)
EXCLUSIVE_LOCKS_REQUIRED(Locks::intern_table_lock_)
LOCKS_EXCLUDED(log_lock_);
void RecordWeakStringInsertion(mirror::String* s)
EXCLUSIVE_LOCKS_REQUIRED(Locks::intern_table_lock_)
LOCKS_EXCLUDED(log_lock_);
void RecordStrongStringRemoval(mirror::String* s)
EXCLUSIVE_LOCKS_REQUIRED(Locks::intern_table_lock_)
LOCKS_EXCLUDED(log_lock_);
void RecordWeakStringRemoval(mirror::String* s)
EXCLUSIVE_LOCKS_REQUIRED(Locks::intern_table_lock_)
LOCKS_EXCLUDED(log_lock_);
// Abort transaction by undoing all recorded changes.
void Rollback()
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
LOCKS_EXCLUDED(log_lock_);
void VisitRoots(RootVisitor* visitor)
LOCKS_EXCLUDED(log_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
private:
class ObjectLog : public ValueObject {
public:
void LogBooleanValue(MemberOffset offset, uint8_t value, bool is_volatile);
void LogByteValue(MemberOffset offset, int8_t value, bool is_volatile);
void LogCharValue(MemberOffset offset, uint16_t value, bool is_volatile);
void LogShortValue(MemberOffset offset, int16_t value, bool is_volatile);
void Log32BitsValue(MemberOffset offset, uint32_t value, bool is_volatile);
void Log64BitsValue(MemberOffset offset, uint64_t value, bool is_volatile);
void LogReferenceValue(MemberOffset offset, mirror::Object* obj, bool is_volatile);
void Undo(mirror::Object* obj) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void VisitRoots(RootVisitor* visitor) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
size_t Size() const {
return field_values_.size();
}
private:
enum FieldValueKind {
kBoolean,
kByte,
kChar,
kShort,
k32Bits,
k64Bits,
kReference
};
struct FieldValue : public ValueObject {
// TODO use JValue instead ?
uint64_t value;
FieldValueKind kind;
bool is_volatile;
};
void LogValue(FieldValueKind kind, MemberOffset offset, uint64_t value, bool is_volatile);
void UndoFieldWrite(mirror::Object* obj, MemberOffset field_offset,
const FieldValue& field_value) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Maps field's offset to its value.
std::map<uint32_t, FieldValue> field_values_;
};
class ArrayLog : public ValueObject {
public:
void LogValue(size_t index, uint64_t value);
void Undo(mirror::Array* obj) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
size_t Size() const {
return array_values_.size();
}
private:
void UndoArrayWrite(mirror::Array* array, Primitive::Type array_type, size_t index,
uint64_t value) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Maps index to value.
// TODO use JValue instead ?
std::map<size_t, uint64_t> array_values_;
};
class InternStringLog : public ValueObject {
public:
enum StringKind {
kStrongString,
kWeakString
};
enum StringOp {
kInsert,
kRemove
};
InternStringLog(mirror::String* s, StringKind kind, StringOp op)
: str_(s), string_kind_(kind), string_op_(op) {
DCHECK(s != nullptr);
}
void Undo(InternTable* intern_table)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
EXCLUSIVE_LOCKS_REQUIRED(Locks::intern_table_lock_);
void VisitRoots(RootVisitor* visitor) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
private:
mirror::String* str_;
const StringKind string_kind_;
const StringOp string_op_;
};
void LogInternedString(const InternStringLog& log)
EXCLUSIVE_LOCKS_REQUIRED(Locks::intern_table_lock_)
LOCKS_EXCLUDED(log_lock_);
void UndoObjectModifications()
EXCLUSIVE_LOCKS_REQUIRED(log_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void UndoArrayModifications()
EXCLUSIVE_LOCKS_REQUIRED(log_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void UndoInternStringTableModifications()
EXCLUSIVE_LOCKS_REQUIRED(Locks::intern_table_lock_)
EXCLUSIVE_LOCKS_REQUIRED(log_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void VisitObjectLogs(RootVisitor* visitor)
EXCLUSIVE_LOCKS_REQUIRED(log_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void VisitArrayLogs(RootVisitor* visitor)
EXCLUSIVE_LOCKS_REQUIRED(log_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void VisitStringLogs(RootVisitor* visitor)
EXCLUSIVE_LOCKS_REQUIRED(log_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
const std::string& GetAbortMessage() LOCKS_EXCLUDED(log_lock_);
Mutex log_lock_ ACQUIRED_AFTER(Locks::intern_table_lock_);
std::map<mirror::Object*, ObjectLog> object_logs_ GUARDED_BY(log_lock_);
std::map<mirror::Array*, ArrayLog> array_logs_ GUARDED_BY(log_lock_);
std::list<InternStringLog> intern_string_logs_ GUARDED_BY(log_lock_);
bool aborted_ GUARDED_BY(log_lock_);
std::string abort_message_ GUARDED_BY(log_lock_);
DISALLOW_COPY_AND_ASSIGN(Transaction);
};
} // namespace art
#endif // ART_RUNTIME_TRANSACTION_H_
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