mirror of
https://github.com/JakeHillion/object-introspection.git
synced 2024-09-19 19:19:05 +01:00
354 lines
9.7 KiB
C++
354 lines
9.7 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 <boost/archive/text_iarchive.hpp>
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#include <cstring>
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#include <filesystem>
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#include <fstream>
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#include <iostream>
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#include "oi/OICompiler.h"
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#include "oi/PaddingHunter.h"
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#include "oi/Serialize.h"
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namespace fs = std::filesystem;
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void usage(char* name) {
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printf("usage: %s <cache_file>\n", name);
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}
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void printDrgnType(const struct drgn_type* type) {
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printf("{");
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printf("\"this\":\"%p\",", static_cast<const void*>(type));
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printf("\"kind\":%d,", type->_private.kind);
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printf("\"name\":\"%s\",", type->_private.name);
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printf("\"size\":%zu", type->_private.size);
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printf("}");
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}
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void printDrgnClassMemberInfo(const DrgnClassMemberInfo& m) {
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printf("{");
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printf("\"type\":");
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printDrgnType(m.type);
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printf(",");
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printf("\"member_name\":\"%s\",", m.member_name.c_str());
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printf("\"bit_offset\":%zu,", m.bit_offset);
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printf("\"bit_field_size\":%zu", m.bit_field_size);
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printf("}");
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}
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void printClassMembersMap(
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const std::map<struct drgn_type*, std::vector<DrgnClassMemberInfo>>&
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classMembersMap) {
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printf("{");
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bool isFirstItem = true;
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for (const auto& [type, members] : classMembersMap) {
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if (!isFirstItem)
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printf(",");
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printf("\"%p\":[", static_cast<const void*>(type));
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{
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bool isInnerFirstItem = true;
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for (const auto& member : members) {
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if (!isInnerFirstItem)
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printf(",");
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printDrgnClassMemberInfo(member);
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isInnerFirstItem = false;
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}
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}
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isFirstItem = false;
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printf("]");
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}
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printf("}");
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}
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void printContainerTypeMap(
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const std::map<
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struct drgn_type*,
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std::pair<ContainerTypeEnum, std::vector<struct drgn_qualified_type>>>&
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containerTypeMap) {
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printf("{");
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bool isFirstItem = true;
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for (const auto& [type, pair] : containerTypeMap) {
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if (!isFirstItem)
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printf(",");
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printf("\"%p\":[", static_cast<const void*>(type));
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{
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bool isInnerFirstItem = true;
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for (const auto& container : pair.second) {
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if (!isInnerFirstItem)
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printf(",");
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printDrgnType(container.type);
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isInnerFirstItem = false;
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}
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}
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printf("]");
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isFirstItem = false;
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}
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printf("}");
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}
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void printTypedefMap(
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const std::map<struct drgn_type*, struct drgn_type*>& typedefMap) {
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printf("{");
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bool isFirstItem = true;
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for (const auto& [typedefType, type] : typedefMap) {
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if (!isFirstItem)
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printf(",");
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printf("\"%p\":", static_cast<const void*>(typedefType));
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printDrgnType(type);
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isFirstItem = false;
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}
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printf("}");
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}
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void printSizeMap(const std::map<std::string, size_t>& sizeMap) {
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printf("{");
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bool isFirstItem = true;
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for (const auto& [typeName, size] : sizeMap) {
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if (!isFirstItem) {
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printf(",");
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}
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printf("\"%s\":%zu", typeName.c_str(), size);
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isFirstItem = false;
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}
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printf("}");
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}
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void printDrgnTypeSet(const std::set<struct drgn_type*>& dummyList) {
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printf("[");
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bool isFirstItem = true;
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for (const auto& type : dummyList) {
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if (!isFirstItem) {
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printf(",");
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}
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printDrgnType(type);
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isFirstItem = false;
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}
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printf("]");
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}
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void printPaddedStruct(
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std::map<std::string, PaddingInfo>::value_type paddedStruct) {
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printf("{\n");
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printf("Name: %s", paddedStruct.first.c_str());
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printf(", object size: %ld", paddedStruct.second.structSize);
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printf(", saving size: %ld", paddedStruct.second.savingSize);
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printf(", padding size: %ld", paddedStruct.second.paddingSize);
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printf(", isSet size: %ld", paddedStruct.second.isSetSize);
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printf("\nSaving opportunity: %ld bytes\n\n",
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paddedStruct.second.paddingSize * paddedStruct.second.instancesCnt);
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printf("%s\n", paddedStruct.second.definition.c_str());
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printf("}");
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}
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void printPaddedStructs(
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const std::map<std::string, PaddingInfo>& paddedStructs) {
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printf("[");
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bool isFirstItem = true;
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for (const auto& paddedStruct : paddedStructs) {
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if (!isFirstItem)
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printf(",");
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printPaddedStruct(paddedStruct);
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isFirstItem = false;
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}
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printf("]");
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}
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void printTypeHierarchy(const TypeHierarchy& th) {
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printf("{");
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printf("\"classMembersMap\":");
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printClassMembersMap(th.classMembersMap);
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printf(",");
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printf("\"containerTypeMap\":");
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printContainerTypeMap(th.containerTypeMap);
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printf(",");
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printf("\"typedefMap\":");
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printTypedefMap(th.typedefMap);
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printf(",");
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printf("\"sizeMap\":");
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printSizeMap(th.sizeMap);
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printf(",");
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printf("\"knownDummyTypeList\":");
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printDrgnTypeSet(th.knownDummyTypeList);
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printf(",");
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printf("\"pointerToTypeMap\":");
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// Re-using printTypedefMap to display pointerToTypeMap
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printTypedefMap(th.pointerToTypeMap);
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printf(",");
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printf("\"thriftIssetStructTypes\":");
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printDrgnTypeSet(th.thriftIssetStructTypes);
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printf("}\n");
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}
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void printFuncArg(const std::shared_ptr<FuncDesc::TargetObject>& funcObj) {
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printf("{");
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printf("\"valid\":%s,", funcObj->valid ? "true" : "false");
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printf("\"typeName\":\"%s\"", funcObj->typeName.c_str());
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const auto* funcArg = dynamic_cast<const FuncDesc::Arg*>(funcObj.get());
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if (funcArg != nullptr) {
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printf(",");
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printf("\"locations\":[");
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for (size_t i = 0; i < funcArg->locator.locations_size; i++) {
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if (i > 0) {
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printf(",");
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}
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const auto& location = funcArg->locator.locations[i];
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printf(
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"{\"start\":\"0x%zx\",\"end\":\"0x%zx\",\"expr_size\":%zu,\"expr\":[",
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location.start, location.end, location.expr_size);
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for (size_t j = 0; j < location.expr_size; j++) {
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if (j > 0) {
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printf(",");
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}
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printf("\"0x%hhx\"", location.expr[j]);
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}
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printf("]}");
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}
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printf("]");
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}
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printf("}");
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}
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void printFuncDesc(const std::shared_ptr<FuncDesc>& funcDesc) {
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printf("{");
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printf("\"symName\":\"%s\",", funcDesc->symName.c_str());
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printf("\"ranges\":[");
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bool isFirstRange = true;
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for (auto& range : funcDesc->ranges) {
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if (!isFirstRange) {
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printf(",");
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}
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printf("{\"start\": \"0x%zx\", \"end\": \"0x%zx\"}", range.start,
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range.end);
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isFirstRange = false;
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}
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printf("],");
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printf("\"isMethod\":%s,", funcDesc->isMethod ? "true" : "false");
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printf("\"funcArgs\":[");
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bool isFirstItem = true;
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if (funcDesc->isMethod) {
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printFuncArg(funcDesc->getThis());
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isFirstItem = false;
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}
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for (size_t i = 0; i < funcDesc->numArgs(); ++i) {
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if (!isFirstItem) {
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printf(",");
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}
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printFuncArg(funcDesc->getArgument(i));
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isFirstItem = false;
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}
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printf("],");
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printf("\"retval\":");
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if (funcDesc->retval) {
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printFuncArg(funcDesc->retval);
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} else {
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printf("null");
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}
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printf("}");
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}
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void printFuncDescs(
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const std::unordered_map<std::string, std::shared_ptr<FuncDesc>>&
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funcDescs) {
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printf("{");
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bool isFirstItem = true;
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for (const auto& [name, funcDesc] : funcDescs) {
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if (!isFirstItem)
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printf(",");
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printf("\"%s\":", name.c_str());
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printFuncDesc(funcDesc);
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isFirstItem = false;
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}
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printf("}\n");
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}
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void printGlobalDesc(const std::shared_ptr<GlobalDesc>& globalDesc) {
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printf("{");
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printf("\"symName\":\"%s\",", globalDesc->symName.c_str());
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printf("\"typeName\":\"%s\",", globalDesc->typeName.c_str());
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printf("\"baseAddr\":\"%p\"",
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reinterpret_cast<const void*>(globalDesc->baseAddr));
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printf("}");
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}
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void printGlobalDescs(
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const std::unordered_map<std::string, std::shared_ptr<GlobalDesc>>&
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globalDescs) {
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printf("{");
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bool isFirstItem = true;
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for (const auto& [name, globalDesc] : globalDescs) {
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if (!isFirstItem) {
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printf(",");
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}
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printf("\"%s\":", name.c_str());
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printGlobalDesc(globalDesc);
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isFirstItem = false;
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}
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printf("}");
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}
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int main(int argc, char* argv[]) {
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if (argc != 2) {
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usage(argv[0]);
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return EXIT_FAILURE;
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}
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if (strcmp(argv[1], "-h") == 0 || strcmp(argv[1], "--help") == 0) {
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usage(argv[0]);
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return EXIT_SUCCESS;
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}
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fs::path cachePath = argv[1];
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if (!fs::exists(cachePath)) {
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fprintf(stderr, "File not found: %s\n", cachePath.c_str());
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return EXIT_FAILURE;
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}
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std::ifstream cacheFile{cachePath};
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boost::archive::text_iarchive cacheArchive{cacheFile};
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std::string buildID;
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cacheArchive >> buildID;
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printf("{\"buildID\":\"%s\",", buildID.c_str());
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printf("\"data\":");
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if (cachePath.extension() == ".fd") {
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std::unordered_map<std::string, std::shared_ptr<FuncDesc>> funcDescs;
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cacheArchive >> funcDescs;
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printFuncDescs(funcDescs);
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} else if (cachePath.extension() == ".gd") {
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std::unordered_map<std::string, std::shared_ptr<GlobalDesc>> globalDescs;
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cacheArchive >> globalDescs;
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printGlobalDescs(globalDescs);
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} else if (cachePath.extension() == ".th") {
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std::pair<RootInfo, TypeHierarchy> typeHierarchy;
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cacheArchive >> typeHierarchy;
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printTypeHierarchy(typeHierarchy.second);
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} else if (cachePath.extension() == ".pd") {
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std::map<std::string, PaddingInfo> paddedStructs;
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cacheArchive >> paddedStructs;
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printPaddedStructs(paddedStructs);
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} else {
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fprintf(stderr, "Unknown file type: %s\n", cachePath.c_str());
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return EXIT_FAILURE;
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}
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printf("}\n");
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return EXIT_SUCCESS;
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}
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