mirror of
https://github.com/JakeHillion/object-introspection.git
synced 2024-09-19 19:19:05 +01:00
652 lines
19 KiB
C++
652 lines
19 KiB
C++
/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "oi/FuncGen.h"
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#include <glog/logging.h>
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#include <boost/format.hpp>
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#include <map>
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#include "oi/ContainerInfo.h"
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namespace {
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const std::string typedValueFunc = R"(
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void getSizeType(const %1%& t, size_t& returnArg)
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{
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const uint8_t KindOfPersistentDict = 14;
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const uint8_t KindOfDict = 15;
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const uint8_t KindOfPersistentVec = 22;
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const uint8_t KindOfVec = 23;
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const uint8_t KindOfPersistentKeyset = 26;
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const uint8_t KindOfKeyset = 27;
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const uint8_t KindOfRecord = 29;
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const uint8_t KindOfPersistentString = 38;
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const uint8_t KindOfString = 39;
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const uint8_t KindOfObject = 43;
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const uint8_t KindOfResource = 45;
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const uint8_t KindOfRFunc = 51;
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const uint8_t KindOfRClsMeth = 53;
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const uint8_t KindOfClsMeth = 56;
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const uint8_t KindOfBoolean = 70;
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const uint8_t KindOfInt64 = 74;
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const uint8_t KindOfDouble = 76;
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const uint8_t KindOfFunc = 82;
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const uint8_t KindOfClass = 84;
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const uint8_t KindOfLazyClass = 88;
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const uint8_t KindOfUninit = 98;
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const uint8_t KindOfNull = 100;
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SAVE_DATA((uintptr_t)t.m_type);
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switch(t.m_type) {
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case KindOfInt64:
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case KindOfBoolean:
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SAVE_DATA(0);
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getSizeType(t.m_data.num, returnArg);
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break;
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case KindOfDouble:
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SAVE_DATA(1);
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getSizeType(t.m_data.dbl, returnArg);
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break;
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case KindOfPersistentString:
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case KindOfString:
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SAVE_DATA(2);
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getSizeType(t.m_data.pstr, returnArg);
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break;
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case KindOfPersistentDict:
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case KindOfDict:
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case KindOfPersistentVec:
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case KindOfVec:
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case KindOfPersistentKeyset:
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case KindOfKeyset:
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SAVE_DATA(3);
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getSizeType(t.m_data.parr, returnArg);
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break;
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case KindOfObject:
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SAVE_DATA(4);
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getSizeType(t.m_data.pobj, returnArg);
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break;
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case KindOfResource:
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SAVE_DATA(5);
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getSizeType(t.m_data.pres, returnArg);
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break;
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case KindOfFunc:
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SAVE_DATA(8);
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getSizeType(t.m_data.pfunc, returnArg);
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break;
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case KindOfRFunc:
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SAVE_DATA(9);
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getSizeType(t.m_data.prfunc, returnArg);
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break;
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case KindOfClass:
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SAVE_DATA(10);
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getSizeType(t.m_data.pclass, returnArg);
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break;
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case KindOfClsMeth:
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SAVE_DATA(11);
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getSizeType(t.m_data.pclsmeth, returnArg);
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break;
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case KindOfRClsMeth:
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SAVE_DATA(12);
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getSizeType(t.m_data.prclsmeth, returnArg);
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break;
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case KindOfRecord:
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SAVE_DATA(13);
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getSizeType(t.m_data.prec, returnArg);
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break;
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case KindOfLazyClass:
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SAVE_DATA(14);
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getSizeType(t.m_data.plazyclass, returnArg);
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break;
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case KindOfUninit:
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case KindOfNull:
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break;
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}
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}
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)";
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} // namespace
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void FuncGen::DeclareGetSize(std::string& testCode, const std::string& type) {
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boost::format fmt =
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boost::format("void getSizeType(const %1% &t, size_t& returnArg);\n") %
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type;
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testCode.append(fmt.str());
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}
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void FuncGen::DeclareTopLevelGetSize(std::string& testCode,
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const std::string& type) {
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boost::format fmt = boost::format("void getSizeType(const %1% &t);\n") % type;
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testCode.append(fmt.str());
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}
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void FuncGen::DeclareStoreData(std::string& testCode) {
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testCode.append("void StoreData(uintptr_t data, size_t& dataSegOffset);\n");
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}
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void FuncGen::DeclareAddData(std::string& testCode) {
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testCode.append("void AddData(uint64_t data, size_t& dataSegOffset);\n");
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}
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void FuncGen::DeclareEncodeData(std::string& testCode) {
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testCode.append("size_t EncodeVarint(uint64_t val, uint8_t* buf);\n");
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}
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void FuncGen::DeclareEncodeDataSize(std::string& testCode) {
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testCode.append("size_t EncodeVarintSize(uint64_t val);\n");
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}
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void FuncGen::DefineEncodeData(std::string& testCode) {
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std::string func = R"(
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size_t EncodeVarint(uint64_t val, uint8_t* buf) {
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uint8_t* p = buf;
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while (val >= 128) {
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*p++ = 0x80 | (val & 0x7f);
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val >>= 7;
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}
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*p++ = uint8_t(val);
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return size_t(p - buf);
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}
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)";
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testCode.append(func);
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}
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void FuncGen::DefineEncodeDataSize(std::string& testCode) {
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std::string func = R"(
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size_t EncodeVarintSize(uint64_t val) {
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int s = 1;
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while (val >= 128) {
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++s;
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val >>= 7;
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}
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return s;
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}
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)";
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testCode.append(func);
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}
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void FuncGen::DefineStoreData(std::string& testCode) {
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// TODO: We are encoding twice. Once to check the size and later to
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// actually encode. Maybe just do it once leaving a max of uintptr_t
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// space at the end.
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std::string func = R"(
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void StoreData(uint64_t data, size_t& dataSegOffset) {
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size_t sz = EncodeVarintSize(data);
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if (sz + dataSegOffset < dataSize) {
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auto data_base = reinterpret_cast<uint8_t*>(dataBase);
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data_base += dataSegOffset;
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size_t data_size = EncodeVarint(data, data_base);
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dataSegOffset += data_size;
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} else {
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dataSegOffset += sz;
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}
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}
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)";
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testCode.append(func);
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}
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void FuncGen::DefineAddData(std::string& testCode) {
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std::string func = R"(
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void AddData(uint64_t data, size_t& output) {
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output += data;
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}
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)";
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testCode.append(func);
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}
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void FuncGen::DefineTopLevelGetObjectSize(std::string& testCode,
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const std::string& rawType,
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const std::string& linkageName) {
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std::string func = R"(
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/* RawType: %1% */
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extern "C" int %2%(const OIInternal::__ROOT_TYPE__* ObjectAddr, size_t* ObjectSize)
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{
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*ObjectSize = 0;
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OIInternal::getSizeType(*ObjectAddr, *ObjectSize);
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return 0;
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}
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)";
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boost::format fmt = boost::format(func) % rawType % linkageName;
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testCode.append(fmt.str());
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}
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void FuncGen::DefineTopLevelGetSizeRef(std::string& testCode,
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const std::string& rawType) {
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std::string func = R"(
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wunknown-attributes"
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/* RawType: %1% */
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void __attribute__((used, retain)) getSize_%2$016x(const OIInternal::__ROOT_TYPE__& t)
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#pragma GCC diagnostic pop
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{
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pointers.initialize();
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pointers.add((uintptr_t)&t);
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auto data = reinterpret_cast<uintptr_t*>(dataBase);
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data[0] = oidMagicId;
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data[1] = cookieValue;
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data[2] = 0;
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size_t dataSegOffset = 3 * sizeof(uintptr_t);
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JLOG("%1% @");
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JLOGPTR(&t);
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OIInternal::getSizeType(t, dataSegOffset);
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OIInternal::StoreData((uintptr_t)123456789, dataSegOffset);
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OIInternal::StoreData((uintptr_t)123456789, dataSegOffset);
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data[2] = dataSegOffset;
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dataBase += dataSegOffset;
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}
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)";
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boost::format fmt =
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boost::format(func) % rawType % std::hash<std::string>{}(rawType);
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testCode.append(fmt.str());
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}
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void FuncGen::DefineTopLevelGetSizeRefTyped(std::string& testCode,
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const std::string& rawType) {
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std::string func = R"(
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wunknown-attributes"
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/* RawType: %1% */
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void __attribute__((used, retain)) getSize_%2$016x(const OIInternal::__ROOT_TYPE__& t)
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#pragma GCC diagnostic pop
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{
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pointers.initialize();
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pointers.add((uintptr_t)&t);
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auto data = reinterpret_cast<uintptr_t*>(dataBase);
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data[0] = oidMagicId;
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data[1] = cookieValue;
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data[2] = 0;
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size_t dataSegOffset = 3 * sizeof(uintptr_t);
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JLOG("%1% @");
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JLOGPTR(&t);
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using DataBufferType = OIInternal::TypeHandler<DataBuffer::DataSegment, OIInternal::__ROOT_TYPE__>::type;
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DataBufferType db = DataBuffer::DataSegment(dataSegOffset);
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StaticTypes::Unit<DataBuffer::DataSegment> out = OIInternal::getSizeType<DataBuffer::DataSegment>(t, db);
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StaticTypes::Unit<DataBuffer::DataSegment> final = out.template cast<StaticTypes::Pair<
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DataBuffer::DataSegment,
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StaticTypes::VarInt<DataBuffer::DataSegment>,
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StaticTypes::VarInt<DataBuffer::DataSegment>
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>>()
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.write(123456789)
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.write(123456789);
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dataSegOffset = final.offset();
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data[2] = dataSegOffset;
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dataBase += dataSegOffset;
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}
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)";
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boost::format fmt =
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boost::format(func) % rawType % std::hash<std::string>{}(rawType);
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testCode.append(fmt.str());
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}
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void FuncGen::DefineTopLevelGetSizeRefRet(std::string& testCode,
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const std::string& rawType) {
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std::string func = R"(
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wunknown-attributes"
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/* Raw Type: %1% */
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size_t __attribute__((used, retain)) getSize(const OIInternal::__ROOT_TYPE__& t)
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#pragma GCC diagnostic pop
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{
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pointers.initialize();
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size_t ret = 0;
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pointers.add((uintptr_t)&t);
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OIInternal::getSizeType(t, ret);
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return ret;
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}
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)";
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boost::format fmt = boost::format(func) % rawType;
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testCode.append(fmt.str());
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}
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void FuncGen::DefineTopLevelGetSizeSmartPtr(std::string& testCode,
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const std::string& rawType) {
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std::string func = R"(
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wunknown-attributes"
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/* RawType: %1% */
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void __attribute__((used, retain)) getSize_%2$016x(const OIInternal::__ROOT_TYPE__& t)
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#pragma GCC diagnostic pop
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{
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pointers.initialize();
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auto data = reinterpret_cast<uintptr_t*>(dataBase);
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data[0] = oidMagicId;
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data[1] = cookieValue;
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data[2] = 0;
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size_t dataSegOffset = 3 * sizeof(uintptr_t);
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OIInternal::getSizeType(t, dataSegOffset);
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OIInternal::StoreData((uintptr_t)123456789, dataSegOffset);
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OIInternal::StoreData((uintptr_t)123456789, dataSegOffset);
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data[2] = dataSegOffset;
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dataBase += dataSegOffset;
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}
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)";
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boost::format fmt =
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boost::format(func) % rawType % std::hash<std::string>{}(rawType);
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testCode.append(fmt.str());
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}
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bool FuncGen::DeclareGetSizeFuncs(std::string& testCode,
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const ContainerInfoRefSet& containerInfo,
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bool chaseRawPointers) {
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for (const ContainerInfo& cInfo : containerInfo) {
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std::string ctype = cInfo.typeName;
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ctype = ctype.substr(0, ctype.find("<", 0));
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auto& decl = cInfo.codegen.decl;
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boost::format fmt = boost::format(decl) % ctype;
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testCode.append(fmt.str());
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}
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if (chaseRawPointers) {
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testCode.append(
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"template<typename T, typename = "
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"std::enable_if_t<!std::is_pointer_v<std::decay_t<T>>>>\n");
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} else {
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testCode.append("template<typename T>\n");
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}
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testCode.append("void getSizeType(const T &t, size_t& returnArg);");
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return true;
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}
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bool FuncGen::DefineGetSizeFuncs(std::string& testCode,
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const ContainerInfoRefSet& containerInfo,
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bool chaseRawPointers) {
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for (const ContainerInfo& cInfo : containerInfo) {
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std::string ctype = cInfo.typeName;
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ctype = ctype.substr(0, ctype.find("<", 0));
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auto& func = cInfo.codegen.func;
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boost::format fmt = boost::format(func) % ctype;
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testCode.append(fmt.str());
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}
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if (chaseRawPointers) {
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testCode.append("template<typename T, typename C>\n");
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} else {
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testCode.append("template<typename T>\n");
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}
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testCode.append(R"(
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void getSizeType(const T &t, size_t& returnArg) {
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JLOG("obj @");
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JLOGPTR(&t);
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SAVE_SIZE(sizeof(T));
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}
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)");
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return true;
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}
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void FuncGen::DefineGetSizeTypedValueFunc(std::string& testCode,
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const std::string& ctype) {
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boost::format fmt = boost::format(typedValueFunc) % ctype;
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testCode.append(fmt.str());
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}
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void FuncGen::DeclareGetContainer(std::string& testCode) {
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std::string func = R"(
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template <class ContainerAdapter>
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const typename ContainerAdapter::container_type & get_container (ContainerAdapter &ca)
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{
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struct unwrap : ContainerAdapter {
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static const typename ContainerAdapter::container_type & get (ContainerAdapter &ca) {
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return ca.*&unwrap::c;
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}
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};
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return unwrap::get(ca);
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}
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)";
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testCode.append(func);
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}
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void FuncGen::DefineDataSegmentDataBuffer(std::string& testCode) {
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constexpr std::string_view func = R"(
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namespace ObjectIntrospection {
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namespace DataBuffer {
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class DataBuffer {
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protected:
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void write_byte(uint8_t);
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};
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class DataSegment: public DataBuffer {
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public:
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DataSegment(size_t offset) : buf(dataBase + offset) {}
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void write_byte(uint8_t byte) {
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// TODO: Change the inputs to dataBase / dataEnd to improve this check
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if (buf < (dataBase + dataSize)) {
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*buf = byte;
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}
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buf++;
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}
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size_t offset() {
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return buf - dataBase;
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}
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private:
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uint8_t* buf;
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};
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} // namespace DataBuffer
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} // namespace ObjectIntrospection
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)";
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testCode.append(func);
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}
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void FuncGen::DefineBasicTypeHandlers(std::string& testCode) {
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constexpr std::string_view handlers = R"(
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template <typename DB, typename T>
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struct TypeHandler {
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private:
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static auto choose_type() {
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if constexpr(std::is_pointer_v<T>) {
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return std::type_identity<StaticTypes::Pair<DB,
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StaticTypes::VarInt<DB>,
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StaticTypes::Sum<DB,
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StaticTypes::Unit<DB>,
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typename TypeHandler<DB, std::remove_pointer_t<T>>::type
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>>>();
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} else {
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return std::type_identity<StaticTypes::Unit<DB>>();
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}
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}
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public:
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using type = typename decltype(choose_type())::type;
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static StaticTypes::Unit<DB> getSizeType(
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const T& t,
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typename TypeHandler<DB, T>::type returnArg) {
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if constexpr(std::is_pointer_v<T>) {
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JLOG("ptr val @");
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JLOGPTR(t);
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auto r0 = returnArg.write((uintptr_t)t);
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if (t && pointers.add((uintptr_t)t)) {
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return r0.template delegate<1>([&t](auto ret) {
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if constexpr (!std::is_void<std::remove_pointer_t<T>>::value) {
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return TypeHandler<DB, std::remove_pointer_t<T>>::getSizeType(*t, ret);
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} else {
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return ret;
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}
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});
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} else {
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return r0.template delegate<0>(std::identity());
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}
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} else {
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return returnArg;
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}
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}
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};
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template <typename DB>
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class TypeHandler<DB, void> {
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public:
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using type = StaticTypes::Unit<DB>;
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};
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)";
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testCode.append(handlers);
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}
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void FuncGen::DefineStaticTypes(std::string& testCode) {
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constexpr std::string_view unitType = R"(
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template <typename DataBuffer>
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class Unit {
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public:
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Unit(DataBuffer db) : _buf(db) {}
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|
|
|
size_t offset() {
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return _buf.offset();
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|
}
|
|
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|
template <typename T>
|
|
T cast() {
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|
return T(_buf);
|
|
}
|
|
|
|
template <typename F>
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|
Unit<DataBuffer>
|
|
delegate(F const& cb) {
|
|
return cb(*this);
|
|
}
|
|
|
|
private:
|
|
DataBuffer _buf;
|
|
};
|
|
)";
|
|
|
|
constexpr std::string_view varintType = R"(
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|
template <typename DataBuffer>
|
|
class VarInt {
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|
public:
|
|
VarInt(DataBuffer db) : _buf(db) {}
|
|
|
|
Unit<DataBuffer> write(uint64_t val) {
|
|
while (val >= 128) {
|
|
_buf.write_byte(0x80 | (val & 0x7f));
|
|
val >>= 7;
|
|
}
|
|
_buf.write_byte(uint8_t(val));
|
|
return Unit<DataBuffer>(_buf);
|
|
}
|
|
|
|
private:
|
|
DataBuffer _buf;
|
|
};
|
|
)";
|
|
|
|
constexpr std::string_view pairType = R"(
|
|
template <typename DataBuffer, typename T1, typename T2>
|
|
class Pair {
|
|
public:
|
|
Pair(DataBuffer db) : _buf(db) {}
|
|
template <class U>
|
|
T2 write(U val) {
|
|
Unit<DataBuffer> second = T1(_buf).write(val);
|
|
return second.template cast<T2>();
|
|
}
|
|
template <typename F>
|
|
T2 delegate(F const& cb) {
|
|
T1 first = T1(_buf);
|
|
Unit<DataBuffer> second = cb(first);
|
|
return second.template cast<T2>();
|
|
}
|
|
private:
|
|
DataBuffer _buf;
|
|
};
|
|
)";
|
|
|
|
constexpr std::string_view sumType = R"(
|
|
template <typename DataBuffer, typename... Types>
|
|
class Sum {
|
|
private:
|
|
template <size_t I, typename... Elements>
|
|
struct Selector;
|
|
template <size_t I, typename Head, typename... Tail>
|
|
struct Selector<I, Head, Tail...> {
|
|
using type = typename std::conditional<I == 0, Head, typename Selector<I - 1, Tail...>::type>::type;
|
|
};
|
|
template<size_t I>
|
|
struct Selector<I> {
|
|
using type = int;
|
|
};
|
|
public:
|
|
Sum(DataBuffer db) : _buf(db) {}
|
|
template <size_t I>
|
|
typename Selector<I, Types...>::type write() {
|
|
Pair<DataBuffer, VarInt<DataBuffer>, typename Selector<I, Types...>::type> buf(_buf);
|
|
return buf.write(I);
|
|
}
|
|
template <size_t I, typename F>
|
|
Unit<DataBuffer> delegate(F const& cb) {
|
|
auto tail = write<I>();
|
|
return cb(tail);
|
|
}
|
|
private:
|
|
DataBuffer _buf;
|
|
};
|
|
)";
|
|
|
|
constexpr std::string_view listType = R"(
|
|
template <typename DataBuffer, typename T>
|
|
class ListContents {
|
|
public:
|
|
ListContents(DataBuffer db) : _buf(db) {}
|
|
|
|
template<typename F>
|
|
ListContents<DataBuffer, T> delegate(F const& cb) {
|
|
T head = T(_buf);
|
|
Unit<DataBuffer> tail = cb(head);
|
|
return tail.template cast<ListContents<DataBuffer, T>>();
|
|
}
|
|
|
|
Unit<DataBuffer> finish() {
|
|
return { _buf };
|
|
}
|
|
private:
|
|
DataBuffer _buf;
|
|
};
|
|
|
|
template <typename DataBuffer, typename T>
|
|
using List = Pair<DataBuffer, VarInt<DataBuffer>, ListContents<DataBuffer, T>>;
|
|
)";
|
|
|
|
testCode.append("namespace ObjectIntrospection {\n");
|
|
testCode.append("namespace StaticTypes {\n");
|
|
|
|
testCode.append(unitType);
|
|
testCode.append(varintType);
|
|
testCode.append(pairType);
|
|
testCode.append(sumType);
|
|
testCode.append(listType);
|
|
|
|
testCode.append("} // namespace StaticTypes {\n");
|
|
testCode.append("} // namespace ObjectIntrospection {\n");
|
|
}
|