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+++ dyld/dyld-1335/other-tools/dyld_shared_cache_util.cpp
@@ -0,0 +1,4191 @@
+/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*-
+ *
+ * Copyright (c) 2009-2012 Apple Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <string.h>
+#include <dlfcn.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <sys/mman.h>
+#include <sys/syslimits.h>
+#include <mach-o/arch.h>
+#include <mach-o/nlist.h>
+#include <mach-o/loader.h>
+#include <mach-o/nlist.h>
+#include <mach-o/dyld_priv.h>
+#include <bootstrap.h>
+#include <mach/mach.h>
+#include <dispatch/dispatch.h>
+#include <uuid/uuid.h>
+
+#include <TargetConditionals.h>
+
+#include <map>
+#include <vector>
+#include <iostream>
+#include <optional>
+#include <ranges>
+
+#include "ClosureFileSystemPhysical.h"
+#include "DyldSharedCache.h"
+#include "JSONWriter.h"
+#include "Trie.hpp"
+#include "dsc_extractor.h"
+#include "dyld_introspection.h"
+#include "OptimizerObjC.h"
+#include "OptimizerSwift.h"
+
+#include "PrebuiltLoader.h"
+#include "DyldProcessConfig.h"
+#include "DyldRuntimeState.h"
+#include "Utilities.h"
+
+#include "objc-shared-cache.h"
+#include "OptimizerObjC.h"
+
+#include "ObjCVisitor.h"
+#include "SymbolicatedImage.h"
+
+using namespace dyld4;
+
+using other_tools::SymbolicatedImage;
+using mach_o::Header;
+using mach_o::Platform;
+using mach_o::Version32;
+
+#if TARGET_OS_OSX
+#define DSC_BUNDLE_REL_PATH "../../lib/dsc_extractor.bundle"
+#else
+#define DSC_BUNDLE_REL_PATH "../lib/dsc_extractor.bundle"
+#endif
+
+
+enum Mode {
+ modeNone,
+ modeList,
+ modeMap,
+ modeDependencies,
+ modeSlideInfo,
+ modeVerboseSlideInfo,
+ modeFixupsInDylib,
+ modeTextInfo,
+ modeLinkEdit,
+ modeLocalSymbols,
+ modeJSONMap,
+ modeVerboseJSONMap,
+ modeJSONDependents,
+ modeSectionSizes,
+ modeStrings,
+ modeInfo,
+ modeTPROInfo,
+ modeStats,
+ modeSize,
+ modeObjCInfo,
+ modeObjCProtocols,
+ modeObjCImpCaches,
+ modeObjCClasses,
+ modeObjCClassLayout,
+ modeObjCClassMethodLists,
+ modeObjCClassHashTable,
+ modeObjCSelectors,
+ modeSwiftProtocolConformances,
+ modeSwiftPtrTables,
+ modeLookupVA,
+ modeExtract,
+ modePatchTable,
+ modeDumpPatchTable,
+ modeRootsCost,
+ modeListDylibsWithSection,
+ modeDuplicates,
+ modeDuplicatesSummary,
+ modeMachHeaders,
+ modeCacheHeader,
+ modeDylibSymbols,
+ modeFunctionStarts,
+ modeFunctionVariants,
+ modePrewarmingData,
+};
+
+struct Options {
+ Mode mode;
+ const char* dependentsOfPath;
+ const char* extractionDir;
+ const char* segmentName;
+ const char* sectionName;
+ const char* rootPath = nullptr;
+ const char* fixupsInDylib;
+ const char* rootsCostOfDylib = nullptr;
+ const char* lookupVA = nullptr;
+ bool printUUIDs;
+ bool printVMAddrs;
+ bool printDylibVersions;
+ bool printInodes;
+};
+
+
+static void usage() {
+ fprintf(stderr, "Usage: dyld_shared_cache_util <command> [-fs-root] [-inode] [-versions] [-vmaddr] [shared-cache-file]\n"
+ " Commands:\n"
+ " -list [-uuid] [-vmaddr] list images\n"
+ " -dependents <dylib-path> list dependents of dylib\n"
+ " -linkedit print linkedit contents\n"
+ " -info print shared cache info\n"
+ " -stats print size stats\n"
+ " -slide_info print slide info\n"
+ " -verbose_slide_info print verbose slide info\n"
+ " -fixups_in_dylib <dylib-path> print fixups in dylib\n"
+ " -text_info print locations of TEXT segments\n"
+ " -local_symbols print local symbols and locations\n"
+ " -strings print C strings in images\n"
+ " -sections print summary of section sizes\n"
+ " -exports list exported symbols in images\n"
+ " -duplicate_exports list symbols exported by multiple images\n"
+ " -duplicate_exports_summary print number of duplicated symbols per image\n"
+ " -map print map of segment locations\n"
+ " -json-map print map of segment locations in JSON format\n"
+ " -verbose-json-map print map of segment and section locations in JSON format\n"
+ " -json-dependents print dependents in JSON format\n"
+ " -size print the size of each image\n"
+ " -objc-info print summary of ObjC content\n"
+ " -objc-protocols list ObjC protocols\n"
+ " -objc-imp-caches print contents of ObjC method caches\n"
+ " -objc-classes print ObjC class names and methods in JSON format\n"
+ " -objc-class-layout print size, start offset, and ivars of ObjC classes\n"
+ " -objc-class-method-lists print methods and properties of ObjC classes\n"
+ " -objc-class-hash-table print the contents of the ObjC class table\n"
+ " -objc-selectors print all ObjC selector names and locations in JSON format\n"
+ " -swift-proto print Swift protocol conformance table\n"
+ " -swift-ptrtables print Swift pointer tables\n"
+ " -lookup-va lookup range and symbols at the given virtual address\n"
+ " -extract <directory> extract images into the given directory\n"
+ " -patch_table print symbol patch table\n"
+ " -list_dylibs_with_section <seg> <sect> list images that contain the given section\n"
+ " -mach_headers summarize mach header of each image\n"
+ " -load_commands summarize load commands of each image\n"
+ " -cache_header print header of each shared cache file\n"
+ " -dylib_symbols print all symbol names and locations\n"
+ " -function_starts print address of beginning of each function\n"
+ " -function_variants print function variants fixups\n"
+ " -roots_cost <dylib-path> estimate the dirty memory cost of installing a dylib root\n"
+ " -prewarming_data print VM prewarming ranges\n");
+}
+
+static void checkMode(Mode mode) {
+ if ( mode != modeNone ) {
+ fprintf(stderr, "Error: select one of: -list, -dependents, -info, -slide_info, -verbose_slide_info, -linkedit, -map, -extract, or -size\n");
+ usage();
+ exit(1);
+ }
+}
+
+struct SymbolicatedCache
+{
+ struct Range
+ {
+ uint64_t startAddr;
+ uint64_t endAddr;
+ std::optional<size_t> imageIndex;
+ std::string_view segmentName;
+ std::string_view sectName;
+
+ bool operator<(const Range& other) const
+ {
+ return startAddr < other.startAddr;
+ }
+ };
+
+ SymbolicatedCache(const DyldSharedCache* cache, bool isCacheOnDisk);
+
+ std::optional<size_t> findClosestRange(uint64_t addr) const;
+ SymbolicatedImage::SymbolLoc findClosestSymbol(uint64_t addr, const SymbolicatedImage*& image) const;
+
+ std::string symbolNameAt(uint64_t addr) const;
+
+ std::vector<Range> ranges;
+ std::vector<Image> machoImages;
+ std::vector<SymbolicatedImage> images;
+ uint64_t cacheBaseAddr;
+};
+
+SymbolicatedCache::SymbolicatedCache(const DyldSharedCache* cache, bool isCacheOnDisk)
+{
+ cacheBaseAddr = cache->unslidLoadAddress();
+
+ machoImages.reserve(cache->imagesCount());
+ images.reserve(cache->imagesCount());
+ cache->forEachImage(^(const Header* hdr, const char* installName) {
+ machoImages.emplace_back((void*)hdr, (size_t)-1, isCacheOnDisk ? Image::MappingKind::dyldLoadedPreFixups : Image::MappingKind::dyldLoadedPostFixups);
+ });
+
+ for ( const Image& image : machoImages )
+ images.emplace_back(image);
+
+ for ( size_t i = 0; i < images.size(); ++i ) {
+ const SymbolicatedImage& im = images[i];
+ im.image().header()->forEachSection(^(const Header::SectionInfo& sectInfo, bool &stop) {
+ if ( sectInfo.size == 0 )
+ return;
+ ranges.push_back({ .imageIndex = i, .startAddr = sectInfo.address, .endAddr = sectInfo.address + sectInfo.size, .segmentName = sectInfo.segmentName, .sectName = sectInfo.sectionName });
+ });
+ }
+
+ std::sort(ranges.begin(), ranges.end());
+ for ( size_t i = 1; i < ranges.size(); ++i ) {
+ if ( ranges[i-1].endAddr > ranges[i].startAddr ) {
+ assert(false && "overlapping image ranges");
+ }
+ }
+}
+
+std::string SymbolicatedCache::symbolNameAt(uint64_t addr) const
+{
+ const SymbolicatedImage* image = nullptr;
+ SymbolicatedImage::SymbolLoc loc = findClosestSymbol(addr, image);
+ if ( loc.name.empty() ) {
+ if ( image ) {
+ return std::string(image->image().header()->installName()) + "+" + json::hex(loc.inSymbolOffset);
+ }
+ return json::hex( addr );
+ }
+
+ std::string nameWithImage = std::string(image->image().header()->installName()) + "`" + std::string(loc.name);
+ if ( loc.inSymbolOffset != 0 )
+ return nameWithImage + "+" + json::hex(loc.inSymbolOffset);
+ return nameWithImage;
+}
+
+std::optional<size_t> SymbolicatedCache::findClosestRange(uint64_t addr) const
+{
+ auto it = std::lower_bound(ranges.begin(), ranges.end(), addr, [](const Range& range, uint64_t cmpAddr) -> bool {
+ return range.startAddr <= cmpAddr;
+ });
+ // lower_bound returns the range after the one we need
+ if ( (it != ranges.end()) && (it != ranges.begin()) ) {
+ --it;
+ } else {
+ it = ranges.begin();
+ }
+
+ if ( addr < it->startAddr || addr >= it->endAddr )
+ return std::nullopt;
+
+ return std::distance(ranges.begin(), it);
+}
+
+SymbolicatedImage::SymbolLoc SymbolicatedCache::findClosestSymbol(uint64_t addr, const SymbolicatedImage*& image) const
+{
+ SymbolicatedImage::SymbolLoc loc;
+ image = nullptr;
+ if ( ranges.empty() )
+ return loc;
+
+ std::optional<size_t> rangeIndex = findClosestRange(addr);
+ if ( !rangeIndex )
+ return loc;
+
+ const Range& range = ranges[*rangeIndex];
+ if ( range.imageIndex == std::nullopt )
+ return loc;
+
+ size_t imageIndex = *range.imageIndex;
+ assert(imageIndex < images.size());
+ //fprintf(stderr, "debug symbol lookup at offset: %llu, abs: 0x%llX, image: %s\n", runtimeOffset, addr, images[imageIndex].image().header()->installName());
+ image = &images[imageIndex];
+ loc = images[imageIndex].findClosestSymbol(addr);
+
+ if ( loc.name.empty() ) {
+ loc.inSymbolOffset = (uint32_t)(addr - image->prefLoadAddress());
+ }
+ return loc;
+}
+
+
+struct SegmentInfo
+{
+ uint64_t vmAddr;
+ uint64_t vmSize;
+ const char* installName;
+ std::string_view segName;
+};
+
+static void sortSegmentInfo(std::vector<SegmentInfo>& segInfos)
+{
+ std::sort(segInfos.begin(), segInfos.end(), [](const SegmentInfo& l, const SegmentInfo& r) -> bool {
+ return l.vmAddr < r.vmAddr;
+ });
+}
+
+static void buildSegmentInfo(const Header* hdr, std::vector<SegmentInfo>& segInfos)
+{
+ const char* installName = hdr->installName();
+ hdr->forEachSegment(^(const Header::SegmentInfo& info, bool& stop) {
+ // Note, we subtract 1 from the vmSize so that lower_bound doesn't include the end of the segment
+ // as being a match for a given address.
+ segInfos.push_back({info.vmaddr, info.vmsize - 1, installName, info.segmentName});
+ });
+}
+
+static void buildSegmentInfo(const DyldSharedCache* dyldCache, std::vector<SegmentInfo>& segInfos)
+{
+ dyldCache->forEachImage(^(const Header* hdr, const char* installName) {
+ buildSegmentInfo(hdr, segInfos);
+ });
+ sortSegmentInfo(segInfos);
+}
+
+static void printSlideInfoForDataRegion(const DyldSharedCache* dyldCache, uint64_t dataStartAddress, uint64_t dataSize,
+ const uint8_t* dataPagesStart,
+ const dyld_cache_slide_info* slideInfoHeader, bool verboseSlideInfo) {
+
+ printf("slide info version=%d\n", slideInfoHeader->version);
+ if ( slideInfoHeader->version == 1 ) {
+ printf("toc_count=%d, data page count=%lld\n", slideInfoHeader->toc_count, dataSize/4096);
+ const dyld_cache_slide_info_entry* entries = (dyld_cache_slide_info_entry*)((char*)slideInfoHeader + slideInfoHeader->entries_offset);
+ const uint16_t* tocs = (uint16_t*)((char*)slideInfoHeader + slideInfoHeader->toc_offset);
+ for(int i=0; i < slideInfoHeader->toc_count; ++i) {
+ printf("0x%08llX: [% 5d,% 5d] ", dataStartAddress + i*4096, i, tocs[i]);
+ const dyld_cache_slide_info_entry* entry = &entries[tocs[i]];
+ for(int j=0; j < slideInfoHeader->entries_size; ++j)
+ printf("%02X", entry->bits[j]);
+ printf("\n");
+ if ( verboseSlideInfo ) {
+ uint8_t* pageContent = (uint8_t*)(long)(dataPagesStart + (4096 * i));
+ for(int j=0; j < slideInfoHeader->entries_size; ++j) {
+ uint8_t bitmask = entry->bits[j];
+ for (unsigned k = 0; k != 8; ++k) {
+ if ( bitmask & (1 << k) ) {
+ uint32_t pageOffset = ((j * 8) + k) * 4;
+ uint8_t* loc = pageContent + pageOffset;
+ uint32_t rawValue = *((uint32_t*)loc);
+ printf(" [% 5d + 0x%04llX]: 0x%016llX\n", i, (uint64_t)(pageOffset), (uint64_t)rawValue);
+ }
+ }
+ }
+ }
+ }
+ }
+ else if ( slideInfoHeader->version == 2 ) {
+ const dyld_cache_slide_info2* slideInfo = (dyld_cache_slide_info2*)(slideInfoHeader);
+ printf("page_size=%d\n", slideInfo->page_size);
+ printf("delta_mask=0x%016llX\n", slideInfo->delta_mask);
+ printf("value_add=0x%016llX\n", slideInfo->value_add);
+ printf("page_starts_count=%d, page_extras_count=%d\n", slideInfo->page_starts_count, slideInfo->page_extras_count);
+ const uint16_t* starts = (uint16_t* )((char*)slideInfo + slideInfo->page_starts_offset);
+ const uint16_t* extras = (uint16_t* )((char*)slideInfo + slideInfo->page_extras_offset);
+ for (int i=0; i < slideInfo->page_starts_count; ++i) {
+ const uint16_t start = starts[i];
+ auto rebaseChain = [&](uint8_t* pageContent, uint16_t startOffset)
+ {
+ uintptr_t slideAmount = 0;
+ const uintptr_t deltaMask = (uintptr_t)(slideInfo->delta_mask);
+ const uintptr_t valueMask = ~deltaMask;
+ const uintptr_t valueAdd = (uintptr_t)(slideInfo->value_add);
+ const unsigned deltaShift = __builtin_ctzll(deltaMask) - 2;
+
+ uint32_t pageOffset = startOffset;
+ uint32_t delta = 1;
+ while ( delta != 0 ) {
+ uint8_t* loc = pageContent + pageOffset;
+ uintptr_t rawValue = *((uintptr_t*)loc);
+ delta = (uint32_t)((rawValue & deltaMask) >> deltaShift);
+ uintptr_t value = (rawValue & valueMask);
+ if ( value != 0 ) {
+ value += valueAdd;
+ value += slideAmount;
+ }
+ printf(" [% 5d + 0x%04llX]: 0x%016llX = 0x%016llX\n", i, (uint64_t)(pageOffset), (uint64_t)rawValue, (uint64_t)value);
+ pageOffset += delta;
+ }
+ };
+ if ( start == DYLD_CACHE_SLIDE_PAGE_ATTR_NO_REBASE ) {
+ printf("page[% 5d]: no rebasing\n", i);
+ }
+ else if ( start & DYLD_CACHE_SLIDE_PAGE_ATTR_EXTRA ) {
+ printf("page[% 5d]: ", i);
+ int j=(start & 0x3FFF);
+ bool done = false;
+ do {
+ uint16_t aStart = extras[j];
+ printf("start=0x%04X ", aStart & 0x3FFF);
+ if ( verboseSlideInfo ) {
+ uint8_t* page = (uint8_t*)(long)(dataPagesStart + (slideInfo->page_size*i));
+ uint16_t pageStartOffset = (aStart & 0x3FFF)*4;
+ rebaseChain(page, pageStartOffset);
+ }
+ done = (extras[j] & DYLD_CACHE_SLIDE_PAGE_ATTR_END);
+ ++j;
+ } while ( !done );
+ printf("\n");
+ }
+ else {
+ printf("page[% 5d]: start=0x%04X\n", i, starts[i]);
+ if ( verboseSlideInfo ) {
+ uint8_t* page = (uint8_t*)(long)(dataPagesStart + (slideInfo->page_size*i));
+ uint16_t pageStartOffset = start*4;
+ rebaseChain(page, pageStartOffset);
+ }
+ }
+ }
+ }
+ else if ( slideInfoHeader->version == 3 ) {
+ const dyld_cache_slide_info3* slideInfo = (dyld_cache_slide_info3*)(slideInfoHeader);
+ printf("page_size=%d\n", slideInfo->page_size);
+ printf("page_starts_count=%d\n", slideInfo->page_starts_count);
+ printf("auth_value_add=0x%016llX\n", slideInfo->auth_value_add);
+ const uintptr_t authValueAdd = (uintptr_t)(slideInfo->auth_value_add);
+ for (int i=0; i < slideInfo->page_starts_count; ++i) {
+ uint16_t delta = slideInfo->page_starts[i];
+ if ( delta == DYLD_CACHE_SLIDE_V3_PAGE_ATTR_NO_REBASE ) {
+ printf("page[% 5d]: no rebasing\n", i);
+ continue;
+ }
+
+ printf("page[% 5d]: start=0x%04X\n", i, delta);
+ if ( !verboseSlideInfo )
+ continue;
+
+ delta = delta/sizeof(uint64_t); // initial offset is byte based
+ const uint8_t* pageStart = dataPagesStart + (i * slideInfo->page_size);
+ const dyld_cache_slide_pointer3* loc = (dyld_cache_slide_pointer3*)pageStart;
+ do {
+ loc += delta;
+ delta = loc->plain.offsetToNextPointer;
+ dyld3::MachOLoaded::ChainedFixupPointerOnDisk ptr;
+ ptr.raw64 = *((uint64_t*)loc);
+ if ( loc->auth.authenticated ) {
+ uint64_t target = authValueAdd + loc->auth.offsetFromSharedCacheBase;
+ uint64_t targetValue = target;
+ printf(" [% 5d + 0x%04llX]: 0x%016llX (JOP: diversity %d, address %s, %s)\n",
+ i, (uint64_t)((const uint8_t*)loc - pageStart), targetValue,
+ ptr.arm64e.authBind.diversity, ptr.arm64e.authBind.addrDiv ? "true" : "false",
+ ptr.arm64e.keyName());
+ }
+ else {
+ uint64_t targetValue = ptr.arm64e.unpackTarget();
+ printf(" [% 5d + 0x%04llX]: 0x%016llX\n", i, (uint64_t)((const uint8_t*)loc - pageStart), targetValue);
+ }
+ } while (delta != 0);
+ }
+ }
+ else if ( slideInfoHeader->version == 4 ) {
+ const dyld_cache_slide_info4* slideInfo = (dyld_cache_slide_info4*)(slideInfoHeader);
+ printf("page_size=%d\n", slideInfo->page_size);
+ printf("delta_mask=0x%016llX\n", slideInfo->delta_mask);
+ printf("value_add=0x%016llX\n", slideInfo->value_add);
+ printf("page_starts_count=%d, page_extras_count=%d\n", slideInfo->page_starts_count, slideInfo->page_extras_count);
+ const uint16_t* starts = (uint16_t* )((char*)slideInfo + slideInfo->page_starts_offset);
+ const uint16_t* extras = (uint16_t* )((char*)slideInfo + slideInfo->page_extras_offset);
+ for (int i=0; i < slideInfo->page_starts_count; ++i) {
+ const uint16_t start = starts[i];
+ auto rebaseChainV4 = [&](uint8_t* pageContent, uint16_t startOffset)
+ {
+ uintptr_t slideAmount = 0;
+ const uintptr_t deltaMask = (uintptr_t)(slideInfo->delta_mask);
+ const uintptr_t valueMask = ~deltaMask;
+ const uintptr_t valueAdd = (uintptr_t)(slideInfo->value_add);
+ const unsigned deltaShift = __builtin_ctzll(deltaMask) - 2;
+
+ uint32_t pageOffset = startOffset;
+ uint32_t delta = 1;
+ while ( delta != 0 ) {
+ uint8_t* loc = pageContent + pageOffset;
+ uint32_t rawValue = *((uint32_t*)loc);
+ delta = (uint32_t)((rawValue & deltaMask) >> deltaShift);
+ uintptr_t value = (rawValue & valueMask);
+ if ( (value & 0xFFFF8000) == 0 ) {
+ // small positive non-pointer, use as-is
+ }
+ else if ( (value & 0x3FFF8000) == 0x3FFF8000 ) {
+ // small negative non-pointer
+ value |= 0xC0000000;
+ }
+ else {
+ value += valueAdd;
+ value += slideAmount;
+ }
+ printf(" [% 5d + 0x%04X]: 0x%08X\n", i, pageOffset, rawValue);
+ pageOffset += delta;
+ }
+ };
+ if ( start == DYLD_CACHE_SLIDE4_PAGE_NO_REBASE ) {
+ printf("page[% 5d]: no rebasing\n", i);
+ }
+ else if ( start & DYLD_CACHE_SLIDE4_PAGE_USE_EXTRA ) {
+ printf("page[% 5d]: ", i);
+ int j=(start & DYLD_CACHE_SLIDE4_PAGE_INDEX);
+ bool done = false;
+ do {
+ uint16_t aStart = extras[j];
+ printf("start=0x%04X ", aStart & DYLD_CACHE_SLIDE4_PAGE_INDEX);
+ if ( verboseSlideInfo ) {
+ uint8_t* page = (uint8_t*)(long)(dataPagesStart + (slideInfo->page_size*i));
+ uint16_t pageStartOffset = (aStart & DYLD_CACHE_SLIDE4_PAGE_INDEX)*4;
+ rebaseChainV4(page, pageStartOffset);
+ }
+ done = (extras[j] & DYLD_CACHE_SLIDE4_PAGE_EXTRA_END);
+ ++j;
+ } while ( !done );
+ printf("\n");
+ }
+ else {
+ printf("page[% 5d]: start=0x%04X\n", i, starts[i]);
+ if ( verboseSlideInfo ) {
+ uint8_t* page = (uint8_t*)(long)(dataPagesStart + (slideInfo->page_size*i));
+ uint16_t pageStartOffset = start*4;
+ rebaseChainV4(page, pageStartOffset);
+ }
+ }
+ }
+ }
+ else if ( slideInfoHeader->version == 5 ) {
+ const dyld_cache_slide_info5* slideInfo = (dyld_cache_slide_info5*)(slideInfoHeader);
+ printf("page_size=%d\n", slideInfo->page_size);
+ printf("page_starts_count=%d\n", slideInfo->page_starts_count);
+ printf("auth_value_add=0x%016llX\n", slideInfo->value_add);
+ const uintptr_t valueAdd = (uintptr_t)(slideInfo->value_add);
+ for (int i=0; i < slideInfo->page_starts_count; ++i) {
+ uint16_t delta = slideInfo->page_starts[i];
+ if ( delta == DYLD_CACHE_SLIDE_V5_PAGE_ATTR_NO_REBASE ) {
+ printf("page[% 5d]: no rebasing\n", i);
+ continue;
+ }
+
+ printf("page[% 5d]: start=0x%04X\n", i, delta);
+ if ( !verboseSlideInfo )
+ continue;
+
+ delta = delta/sizeof(uint64_t); // initial offset is byte based
+ const uint8_t* pageStart = dataPagesStart + (i * slideInfo->page_size);
+ const dyld_cache_slide_pointer5* loc = (dyld_cache_slide_pointer5*)pageStart;
+
+ do {
+ loc += delta;
+ delta = loc->regular.next;
+
+ dyld3::MachOLoaded::ChainedFixupPointerOnDisk ptr;
+ ptr.raw64 = *((uint64_t*)loc);
+ PointerMetaData pmd(&ptr, DYLD_CHAINED_PTR_ARM64E_SHARED_CACHE);
+
+ uint64_t targetValue = valueAdd + loc->regular.runtimeOffset;
+ if ( pmd.authenticated ) {
+ printf(" [% 5d + 0x%04llX]: 0x%016llX (JOP: diversity %d, address %s, %s)\n",
+ i, (uint64_t)((const uint8_t*)loc - pageStart), targetValue,
+ ptr.cache64e.auth.diversity, ptr.cache64e.auth.addrDiv ? "true" : "false",
+ ptr.cache64e.keyName());
+ } else {
+ targetValue = targetValue | ptr.cache64e.high8();
+ printf(" [% 5d + 0x%04llX]: 0x%016llX\n", i, (uint64_t)((const uint8_t*)loc - pageStart), targetValue);
+ }
+ } while (delta != 0);
+ }
+ }
+}
+
+static void forEachSlidValue(const DyldSharedCache* dyldCache, uint64_t dataStartAddress, uint64_t dataSize,
+ const uint8_t* dataPagesStart,
+ const dyld_cache_slide_info* slideInfoHeader,
+ void (^callback)(uint64_t fixupVMAddr, uint64_t targetVMAddr,
+ PointerMetaData PMD))
+{
+ if ( slideInfoHeader->version == 1 ) {
+ const dyld_cache_slide_info_entry* entries = (dyld_cache_slide_info_entry*)((char*)slideInfoHeader + slideInfoHeader->entries_offset);
+ const uint16_t* tocs = (uint16_t*)((char*)slideInfoHeader + slideInfoHeader->toc_offset);
+ for(int i=0; i < slideInfoHeader->toc_count; ++i) {
+ const dyld_cache_slide_info_entry* entry = &entries[tocs[i]];
+ uint8_t* pageContent = (uint8_t*)(long)(dataPagesStart + (4096 * i));
+ for(int j=0; j < slideInfoHeader->entries_size; ++j) {
+ uint8_t bitmask = entry->bits[j];
+ for (unsigned k = 0; k != 8; ++k) {
+ if ( bitmask & (1 << k) ) {
+ uint32_t pageOffset = ((j * 8) + k) * 4;
+ uint8_t* loc = pageContent + pageOffset;
+ uint32_t rawValue = *((uint32_t*)loc);
+
+ uint64_t offsetInDataRegion = loc - dataPagesStart;
+ uint64_t fixupVMAddr = dataStartAddress + offsetInDataRegion;
+ uint64_t targetVMAddr = rawValue;
+ callback(fixupVMAddr, targetVMAddr, PointerMetaData());
+ }
+ }
+ }
+ }
+ }
+ else if ( slideInfoHeader->version == 2 ) {
+ const dyld_cache_slide_info2* slideInfo = (dyld_cache_slide_info2*)(slideInfoHeader);
+ const uint16_t* starts = (uint16_t* )((char*)slideInfo + slideInfo->page_starts_offset);
+ const uint16_t* extras = (uint16_t* )((char*)slideInfo + slideInfo->page_extras_offset);
+ for (int i=0; i < slideInfo->page_starts_count; ++i) {
+ const uint16_t start = starts[i];
+ auto rebaseChain = [&](uint8_t* pageContent, uint16_t startOffset)
+ {
+ uintptr_t slideAmount = 0;
+ const uintptr_t deltaMask = (uintptr_t)(slideInfo->delta_mask);
+ const uintptr_t valueMask = ~deltaMask;
+ const uintptr_t valueAdd = (uintptr_t)(slideInfo->value_add);
+ const unsigned deltaShift = __builtin_ctzll(deltaMask) - 2;
+
+ uint32_t pageOffset = startOffset;
+ uint32_t delta = 1;
+ while ( delta != 0 ) {
+ uint8_t* loc = pageContent + pageOffset;
+ uintptr_t rawValue = *((uintptr_t*)loc);
+ delta = (uint32_t)((rawValue & deltaMask) >> deltaShift);
+ uintptr_t value = (rawValue & valueMask);
+ if ( value != 0 ) {
+ value += valueAdd;
+ value += slideAmount;
+ }
+ pageOffset += delta;
+
+ uint64_t offsetInDataRegion = loc - dataPagesStart;
+ uint64_t fixupVMAddr = dataStartAddress + offsetInDataRegion;
+ uint64_t targetVMAddr = value;
+ callback(fixupVMAddr, targetVMAddr, PointerMetaData());
+ }
+ };
+ if ( start == DYLD_CACHE_SLIDE_PAGE_ATTR_NO_REBASE ) {
+ // Nothing to do here
+ }
+ else if ( start & DYLD_CACHE_SLIDE_PAGE_ATTR_EXTRA ) {
+ int j=(start & 0x3FFF);
+ bool done = false;
+ do {
+ uint16_t aStart = extras[j];
+ uint8_t* page = (uint8_t*)(long)(dataPagesStart + (slideInfo->page_size*i));
+ uint16_t pageStartOffset = (aStart & 0x3FFF)*4;
+ rebaseChain(page, pageStartOffset);
+ done = (extras[j] & DYLD_CACHE_SLIDE_PAGE_ATTR_END);
+ ++j;
+ } while ( !done );
+ }
+ else {
+ uint8_t* page = (uint8_t*)(long)(dataPagesStart + (slideInfo->page_size*i));
+ uint16_t pageStartOffset = start*4;
+ rebaseChain(page, pageStartOffset);
+ }
+ }
+ }
+ else if ( slideInfoHeader->version == 3 ) {
+ const dyld_cache_slide_info3* slideInfo = (dyld_cache_slide_info3*)(slideInfoHeader);
+ const uintptr_t authValueAdd = (uintptr_t)(slideInfo->auth_value_add);
+ for (int i=0; i < slideInfo->page_starts_count; ++i) {
+ uint16_t delta = slideInfo->page_starts[i];
+ if ( delta == DYLD_CACHE_SLIDE_V3_PAGE_ATTR_NO_REBASE ) {
+ // Nothing to do here
+ continue;
+ }
+
+ delta = delta/sizeof(uint64_t); // initial offset is byte based
+ const uint8_t* pageStart = dataPagesStart + (i * slideInfo->page_size);
+ const dyld_cache_slide_pointer3* loc = (dyld_cache_slide_pointer3*)pageStart;
+ do {
+ loc += delta;
+ delta = loc->plain.offsetToNextPointer;
+ dyld3::MachOLoaded::ChainedFixupPointerOnDisk ptr;
+ ptr.raw64 = *((uint64_t*)loc);
+ if ( loc->auth.authenticated ) {
+ uint64_t targetVMAddr = authValueAdd + loc->auth.offsetFromSharedCacheBase;
+
+ PointerMetaData pmd(&ptr, DYLD_CHAINED_PTR_ARM64E);
+ uint64_t offsetInDataRegion = (const uint8_t*)loc - dataPagesStart;
+ uint64_t fixupVMAddr = dataStartAddress + offsetInDataRegion;
+ callback(fixupVMAddr, targetVMAddr, pmd);
+ }
+ else {
+ uint64_t targetVMAddr = ptr.arm64e.unpackTarget();
+
+ uint64_t offsetInDataRegion = (const uint8_t*)loc - dataPagesStart;
+ uint64_t fixupVMAddr = dataStartAddress + offsetInDataRegion;
+ callback(fixupVMAddr, targetVMAddr, PointerMetaData());
+ }
+ } while (delta != 0);
+ }
+ }
+ else if ( slideInfoHeader->version == 4 ) {
+ const dyld_cache_slide_info4* slideInfo = (dyld_cache_slide_info4*)(slideInfoHeader);
+ const uint16_t* starts = (uint16_t* )((char*)slideInfo + slideInfo->page_starts_offset);
+ const uint16_t* extras = (uint16_t* )((char*)slideInfo + slideInfo->page_extras_offset);
+ for (int i=0; i < slideInfo->page_starts_count; ++i) {
+ const uint16_t start = starts[i];
+ auto rebaseChainV4 = [&](uint8_t* pageContent, uint16_t startOffset)
+ {
+ uintptr_t slideAmount = 0;
+ const uintptr_t deltaMask = (uintptr_t)(slideInfo->delta_mask);
+ const uintptr_t valueMask = ~deltaMask;
+ const uintptr_t valueAdd = (uintptr_t)(slideInfo->value_add);
+ const unsigned deltaShift = __builtin_ctzll(deltaMask) - 2;
+
+ uint32_t pageOffset = startOffset;
+ uint32_t delta = 1;
+ while ( delta != 0 ) {
+ uint8_t* loc = pageContent + pageOffset;
+ uint32_t rawValue = *((uint32_t*)loc);
+ delta = (uint32_t)((rawValue & deltaMask) >> deltaShift);
+ uintptr_t value = (rawValue & valueMask);
+ if ( (value & 0xFFFF8000) == 0 ) {
+ // small positive non-pointer, use as-is
+ }
+ else if ( (value & 0x3FFF8000) == 0x3FFF8000 ) {
+ // small negative non-pointer
+ value |= 0xC0000000;
+ }
+ else {
+ value += valueAdd;
+ value += slideAmount;
+
+ uint64_t offsetInDataRegion = (const uint8_t*)loc - dataPagesStart;
+ uint64_t fixupVMAddr = dataStartAddress + offsetInDataRegion;
+ uint64_t targetVMAddr = value;
+ callback(fixupVMAddr, targetVMAddr, PointerMetaData());
+ }
+ pageOffset += delta;
+ }
+ };
+ if ( start == DYLD_CACHE_SLIDE4_PAGE_NO_REBASE ) {
+ // Nothing to do here
+ }
+ else if ( start & DYLD_CACHE_SLIDE4_PAGE_USE_EXTRA ) {
+ int j=(start & DYLD_CACHE_SLIDE4_PAGE_INDEX);
+ bool done = false;
+ do {
+ uint16_t aStart = extras[j];
+ uint8_t* page = (uint8_t*)(long)(dataPagesStart + (slideInfo->page_size*i));
+ uint16_t pageStartOffset = (aStart & DYLD_CACHE_SLIDE4_PAGE_INDEX)*4;
+ rebaseChainV4(page, pageStartOffset);
+ done = (extras[j] & DYLD_CACHE_SLIDE4_PAGE_EXTRA_END);
+ ++j;
+ } while ( !done );
+ }
+ else {
+ uint8_t* page = (uint8_t*)(long)(dataPagesStart + (slideInfo->page_size*i));
+ uint16_t pageStartOffset = start*4;
+ rebaseChainV4(page, pageStartOffset);
+ }
+ }
+ }
+ else if ( slideInfoHeader->version == 5 ) {
+ const dyld_cache_slide_info5* slideInfo = (dyld_cache_slide_info5*)(slideInfoHeader);
+ const uintptr_t valueAdd = (uintptr_t)(slideInfo->value_add);
+ for (int i=0; i < slideInfo->page_starts_count; ++i) {
+ uint16_t delta = slideInfo->page_starts[i];
+ if ( delta == DYLD_CACHE_SLIDE_V5_PAGE_ATTR_NO_REBASE ) {
+ // Nothing to do here
+ continue;
+ }
+
+ delta = delta/sizeof(uint64_t); // initial offset is byte based
+ const uint8_t* pageStart = dataPagesStart + (i * slideInfo->page_size);
+ const dyld_cache_slide_pointer5* loc = (dyld_cache_slide_pointer5*)pageStart;
+ do {
+ loc += delta;
+ delta = loc->regular.next;
+
+ dyld3::MachOLoaded::ChainedFixupPointerOnDisk ptr;
+ ptr.raw64 = *((uint64_t*)loc);
+ PointerMetaData pmd(&ptr, DYLD_CHAINED_PTR_ARM64E_SHARED_CACHE);
+
+ uint64_t offsetInDataRegion = (const uint8_t*)loc - dataPagesStart;
+ uint64_t fixupVMAddr = dataStartAddress + offsetInDataRegion;
+ uint64_t targetVMAddr = valueAdd + loc->auth.runtimeOffset + ((uint64_t)pmd.high8 << 56);
+ callback(fixupVMAddr, targetVMAddr, pmd);
+ } while (delta != 0);
+ }
+ }
+}
+
+
+static bool findImageAndSegment(const DyldSharedCache* dyldCache, const std::vector<SegmentInfo>& segInfos, uint64_t cacheOffset, SegmentInfo* found)
+{
+ const uint64_t locVmAddr = dyldCache->unslidLoadAddress() + cacheOffset;
+ const SegmentInfo target = { locVmAddr, 0, NULL, { } };
+ const auto lowIt = std::lower_bound(segInfos.begin(), segInfos.end(), target,
+ [](const SegmentInfo& l, const SegmentInfo& r) -> bool {
+ return l.vmAddr+l.vmSize < r.vmAddr+r.vmSize;
+ });
+
+ if ( lowIt == segInfos.end() )
+ return false;
+
+ if ( locVmAddr < lowIt->vmAddr )
+ return false;
+ if ( locVmAddr >= (lowIt->vmAddr + lowIt->vmSize) )
+ return false;
+
+ *found = *lowIt;
+ return true;
+}
+
+static void dumpObjCClassLayout(const DyldSharedCache* dyldCache)
+{
+ dyldCache->forEachImage(^(const Header *hdr, const char *installName) {
+ const dyld3::MachOAnalyzer* ma = (dyld3::MachOAnalyzer*)hdr;
+ Diagnostics diag;
+
+ uint64_t sharedCacheRelativeSelectorBaseVMAddress = dyldCache->sharedCacheRelativeSelectorBaseVMAddress();
+ __block objc_visitor::Visitor visitor(dyldCache, ma, VMAddress(sharedCacheRelativeSelectorBaseVMAddress));
+ visitor.forEachClassAndMetaClass(^(const objc_visitor::Class& objcClass, bool& stopClass) {
+ const char* className = objcClass.getName(visitor);
+ bool isMetaClass = objcClass.isMetaClass;
+ uint32_t instanceStart = objcClass.getInstanceStart(visitor);
+ objc_visitor::IVarList ivars = objcClass.getIVars(visitor);
+
+ printf("%s (%s): start 0x%x\n", className, isMetaClass ? "metaclass" : "class", instanceStart);
+ std::optional<metadata_visitor::ResolvedValue> superClassValue = objcClass.getSuperclass(visitor);
+ if ( superClassValue.has_value() ) {
+ bool unusedIsPatchable = false;
+ objc_visitor::Class superClass(superClassValue.value(), isMetaClass, unusedIsPatchable);
+ const char* superClassName = superClass.getName(visitor);
+ uint32_t superStart = superClass.getInstanceStart(visitor);
+ uint32_t superSize = superClass.getInstanceSize(visitor);
+ printf(" super %s (%s): start 0x%x, size 0x%x\n", superClassName,
+ isMetaClass ? "metaclass" : "class", superStart, superSize);
+ }
+
+ uint32_t numIVars = ivars.numIVars();
+ for ( uint32_t i = 0; i != numIVars; ++i ) {
+ objc_visitor::IVar ivar = ivars.getIVar(visitor, i);
+ std::optional<uint32_t> ivarStart = ivar.getOffset(visitor);
+ const char* name = ivar.getName(visitor);
+ printf(" ivar %s: 0x%x (start + 0x%d), alignment %d\n",
+ name,
+ ivarStart.has_value() ? ivarStart.value() : -1,
+ ivarStart.has_value() ? (ivarStart.value() - instanceStart) : -1,
+ ivar.getAlignment(visitor));
+ }
+ });
+ });
+}
+
+template<typename ListTy>
+static ListTy skipListsOfLists(ListTy&& list, const objc_visitor::Visitor& visitor)
+{
+ // we only want the class list. Ignore all ther other lists of lists
+ if ( list.isListOfLists() ) {
+ const ListOfListsEntry* listHeader = (ListOfListsEntry*)((uint8_t*) ((uint64_t)list.getLocation() & ~1));
+ VMAddress methodListVMAddr = list.getVMAddress().value() - VMOffset(1ULL);
+
+ if ( listHeader->count != 0 ) {
+ uint32_t classListIndex = listHeader->count - 1;
+
+ const ListOfListsEntry& listEntry = (listHeader + 1)[classListIndex];
+
+ // The list entry is a relative offset to the target
+ // Work out the VMAddress of that target
+ VMOffset listEntryVMOffset{(uint64_t)&listEntry - (uint64_t)listHeader};
+ VMAddress listEntryVMAddr = methodListVMAddr + listEntryVMOffset;
+ VMAddress targetVMAddr = listEntryVMAddr + VMOffset((uint64_t)listEntry.offset);
+
+ metadata_visitor::ResolvedValue classMethodListValue = visitor.getValueFor(targetVMAddr);
+ ListTy classMethodList(classMethodListValue);
+
+ return classMethodList;
+ } else {
+ return { std::nullopt };
+ }
+ }
+
+ return list;
+}
+
+static void dumpObjCClassMethodLists(const DyldSharedCache* dyldCache)
+{
+ // Map from vmAddr to the category name for that address
+
+ __block std::unordered_map<VMAddress, std::string, VMAddressHash, VMAddressEqual> categoryMap;
+ dyldCache->forEachImage(^(const Header *hdr, const char *installName) {
+ const dyld3::MachOAnalyzer* ma = (dyld3::MachOAnalyzer*)hdr;
+ Diagnostics diag;
+
+ const char* leafName = strrchr(installName, '/');
+ if ( leafName == NULL )
+ leafName = installName;
+ else
+ leafName++;
+
+ uint64_t sharedCacheRelativeSelectorBaseVMAddress = dyldCache->sharedCacheRelativeSelectorBaseVMAddress();
+ __block objc_visitor::Visitor visitor(dyldCache, ma, VMAddress(sharedCacheRelativeSelectorBaseVMAddress));
+ visitor.forEachCategory(^(const objc_visitor::Category& objcCategory, bool& stopCategory) {
+ const char* categoryName = objcCategory.getName(visitor);
+ {
+ objc_visitor::MethodList methodList = objcCategory.getClassMethods(visitor);
+ std::optional<VMAddress> vmAddr = methodList.getVMAddress();
+ if ( vmAddr.has_value() ) {
+ categoryMap[vmAddr.value()] = std::string(categoryName) + " - " + leafName;
+ }
+ }
+ {
+ objc_visitor::MethodList methodList = objcCategory.getInstanceMethods(visitor);
+ std::optional<VMAddress> vmAddr = methodList.getVMAddress();
+ if ( vmAddr.has_value() ) {
+ categoryMap[vmAddr.value()] = std::string(categoryName) + " - " + leafName;
+ }
+ }
+ {
+ objc_visitor::ProtocolList protocolList = objcCategory.getProtocols(visitor);
+ std::optional<VMAddress> vmAddr = protocolList.getVMAddress();
+ if ( vmAddr.has_value() ) {
+ categoryMap[vmAddr.value()] = std::string(categoryName) + " - " + leafName;
+ }
+ }
+ {
+ objc_visitor::PropertyList propertyList = objcCategory.getClassProperties(visitor);
+ std::optional<VMAddress> vmAddr = propertyList.getVMAddress();
+ if ( vmAddr.has_value() ) {
+ categoryMap[vmAddr.value()] = std::string(categoryName) + " - " + leafName;
+ }
+ }
+ {
+ objc_visitor::PropertyList propertyList = objcCategory.getInstanceProperties(visitor);
+ std::optional<VMAddress> vmAddr = propertyList.getVMAddress();
+ if ( vmAddr.has_value() ) {
+ categoryMap[vmAddr.value()] = std::string(categoryName) + " - " + leafName;
+ }
+ }
+ });
+ });
+
+ __block std::map<uint64_t, const char*> dylibVMAddrMap;
+ dyldCache->forEachImage(^(const Header *hdr, const char *installName) {
+ if ( hdr->hasObjC() )
+ dylibVMAddrMap[hdr->preferredLoadAddress()] = installName;
+ });
+
+#if 0
+ // Get a map of all dylibs in the cache from their "objc index" to install name
+ __block std::map<uint16_t, const char*> dylibMap;
+
+ const objc::HeaderInfoRO* headerInfoRO = dyldCache->objcHeaderInfoRO();
+ const bool is64 = (strstr(dyldCache->archName(), "64") != nullptr) && (strstr(dyldCache->archName(), "64_32") == nullptr);
+ if ( is64 ) {
+ const auto* headerInfo64 = (objc::objc_headeropt_ro_t<uint64_t>*)headerInfoRO;
+ uint64_t headerInfoVMAddr = dyldCache->unslidLoadAddress();
+ headerInfoVMAddr += (uint64_t)headerInfo64 - (uint64_t)dyldCache;
+ for ( std::pair<uint64_t, const char*> vmAddrAndName : dylibVMAddrMap ) {
+ const objc::objc_header_info_ro_t<uint64_t>* element = headerInfo64->get(headerInfoVMAddr, vmAddrAndName.first);
+ if ( element != nullptr ) {
+ dylibMap[headerInfo64->index(element)] = vmAddrAndName.second;
+ }
+ }
+ } else {
+ const auto* headerInfo32 = (objc::objc_headeropt_ro_t<uint32_t>*)headerInfoRO;
+ uint64_t headerInfoVMAddr = dyldCache->unslidLoadAddress();
+ headerInfoVMAddr += (uint64_t)headerInfo32 - (uint64_t)dyldCache;
+ for ( std::pair<uint64_t, const char*> vmAddrAndName : dylibVMAddrMap ) {
+ const objc::objc_header_info_ro_t<uint32_t>* element = headerInfo32->get(headerInfoVMAddr, vmAddrAndName.first);
+ if ( element != nullptr ) {
+ dylibMap[headerInfo32->index(element)] = vmAddrAndName.second;
+ }
+ }
+ }
+ }
+#endif
+
+ // Print all method lists in the shared cache
+
+ struct ListOfListsEntry {
+ union {
+ struct {
+ uint64_t imageIndex: 16;
+ int64_t offset: 48;
+ };
+ struct {
+ uint32_t entsize;
+ uint32_t count;
+ };
+ };
+ };
+
+ __block std::unordered_set<VMAddress, VMAddressHash, VMAddressEqual> seenCategories;
+ dyldCache->forEachImage(^(const Header *hdr, const char *installName) {
+ const dyld3::MachOAnalyzer* ma = (dyld3::MachOAnalyzer*)hdr;
+ Diagnostics diag;
+
+ printf("--- %s ---\n", installName);
+
+ uint64_t sharedCacheRelativeSelectorBaseVMAddress = dyldCache->sharedCacheRelativeSelectorBaseVMAddress();
+ __block objc_visitor::Visitor visitor(dyldCache, ma, VMAddress(sharedCacheRelativeSelectorBaseVMAddress));
+ visitor.forEachClassAndMetaClass(^(const objc_visitor::Class& objcClass, bool& stopClass) {
+ const char* className = objcClass.getName(visitor);
+ bool isMetaClass = objcClass.isMetaClass;
+
+ printf("%s (%s):\n", className, isMetaClass ? "metaclass" : "class");
+ // method lists
+ {
+ objc_visitor::MethodList methodList = objcClass.getBaseMethods(visitor);
+ if ( methodList.isListOfLists() ) {
+ const ListOfListsEntry* listHeader = (ListOfListsEntry*)((uint8_t*) ((uint64_t)methodList.getLocation() & ~1));
+ VMAddress methodListVMAddr = methodList.getVMAddress().value() - VMOffset(1ULL);
+
+ printf("(list of %d lists) {\n", listHeader->count);
+ for ( uint32_t i = 0; i != listHeader->count; ++i ) {
+ const ListOfListsEntry& listEntry = (listHeader + 1)[i];
+
+ // The list entry is a relative offset to the target
+ // Work out the VMAddress of that target
+ VMOffset listEntryVMOffset{(uint64_t)&listEntry - (uint64_t)listHeader};
+ VMAddress listEntryVMAddr = methodListVMAddr + listEntryVMOffset;
+ VMAddress targetVMAddr = listEntryVMAddr + VMOffset((uint64_t)listEntry.offset);
+
+ auto categoryIt = categoryMap.find(targetVMAddr);
+ if ( categoryIt != categoryMap.end() ) {
+ seenCategories.insert(targetVMAddr);
+ printf(" (category methods: image (%d) %s) {\n", listEntry.imageIndex, categoryIt->second.c_str());
+
+ metadata_visitor::ResolvedValue catMethodListValue = visitor.getValueFor(targetVMAddr);
+ objc_visitor::MethodList catMethodList(catMethodListValue);
+ uint32_t numMethods = catMethodList.numMethods();
+ for ( uint32_t methodIndex = 0; methodIndex != numMethods; ++methodIndex ) {
+ objc_visitor::Method method = catMethodList.getMethod(visitor, methodIndex);
+ const char* name = method.getName(visitor);
+ printf(" %s\n", name);
+ }
+
+ printf(" }\n");
+ } else {
+ // If we didn't find a category then we must be processing the class
+ // methods. These have to be last
+ if ( (i + 1) != listHeader->count ) {
+ fprintf(stderr, "Invalid method list on %s in %s\n", className, installName);
+ exit(1);
+ }
+ printf(" (class methods: image (%d)) {\n", listEntry.imageIndex);
+
+ metadata_visitor::ResolvedValue classMethodListValue = visitor.getValueFor(targetVMAddr);
+ objc_visitor::MethodList classMethodList(classMethodListValue);
+ uint32_t numMethods = classMethodList.numMethods();
+ for ( uint32_t methodIndex = 0; methodIndex != numMethods; ++methodIndex ) {
+ objc_visitor::Method method = classMethodList.getMethod(visitor, methodIndex);
+ const char* name = method.getName(visitor);
+ printf(" %s\n", name);
+ }
+
+ printf(" }\n");
+ }
+ }
+ printf("}\n");
+ } else {
+ printf("(class methods) {\n");
+ uint32_t numMethods = methodList.numMethods();
+ for ( uint32_t methodIndex = 0; methodIndex != numMethods; ++methodIndex ) {
+ objc_visitor::Method method = methodList.getMethod(visitor, methodIndex);
+ const char* name = method.getName(visitor);
+ printf(" %s\n", name);
+ }
+ printf("}\n");
+ }
+ }
+
+ // protocol lists
+ if ( !isMetaClass) {
+ objc_visitor::ProtocolList protocolList = objcClass.getBaseProtocols(visitor);
+ if ( protocolList.isListOfLists() ) {
+
+ const ListOfListsEntry* listHeader = (ListOfListsEntry*)((uint8_t*) ((uint64_t)protocolList.getLocation() & ~1));
+ VMAddress protocolListVMAddr = protocolList.getVMAddress().value() - VMOffset(1ULL);
+
+ printf("(list of %d lists) {\n", listHeader->count);
+ for ( uint32_t i = 0; i != listHeader->count; ++i ) {
+ const ListOfListsEntry& listEntry = (listHeader + 1)[i];
+
+ // The list entry is a relative offset to the target
+ // Work out the VMAddress of that target
+ VMOffset listEntryVMOffset{(uint64_t)&listEntry - (uint64_t)listHeader};
+ VMAddress listEntryVMAddr = protocolListVMAddr + listEntryVMOffset;
+ VMAddress targetVMAddr = listEntryVMAddr + VMOffset((uint64_t)listEntry.offset);
+
+ auto categoryIt = categoryMap.find(targetVMAddr);
+ if ( categoryIt != categoryMap.end() ) {
+ seenCategories.insert(targetVMAddr);
+ printf(" (category protocols: image (%d) %s) {\n", listEntry.imageIndex, categoryIt->second.c_str());
+
+ metadata_visitor::ResolvedValue catProtocolListValue = visitor.getValueFor(targetVMAddr);
+ objc_visitor::ProtocolList catProtocolList(catProtocolListValue);
+ uint64_t numProtocols = catProtocolList.numProtocols(visitor);
+ for ( uint64_t protocolIndex = 0; protocolIndex != numProtocols; ++protocolIndex ) {
+ objc_visitor::Protocol protocol = catProtocolList.getProtocol(visitor, protocolIndex);
+ const char* name = protocol.getName(visitor);
+ printf(" %s\n", name);
+ }
+
+ printf(" }\n");
+ } else {
+ // If we didn't find a category then we must be processing the class
+ // protocols. These have to be last
+ if ( (i + 1) != listHeader->count ) {
+ fprintf(stderr, "Invalid protocol list on %s in %s\n", className, installName);
+ exit(1);
+ }
+ printf(" (class protocols: image (%d)) {\n", listEntry.imageIndex);
+
+ metadata_visitor::ResolvedValue classProtocolListValue = visitor.getValueFor(targetVMAddr);
+ objc_visitor::ProtocolList classProtocolList(classProtocolListValue);
+ uint64_t numProtocols = classProtocolList.numProtocols(visitor);
+ for ( uint64_t protocolIndex = 0; protocolIndex != numProtocols; ++protocolIndex ) {
+ objc_visitor::Protocol protocol = classProtocolList.getProtocol(visitor, protocolIndex);
+ const char* name = protocol.getName(visitor);
+ printf(" %s\n", name);
+ }
+
+ printf(" }\n");
+ }
+ }
+ printf("}\n");
+ } else {
+ printf("(class protocols) {\n");
+ uint64_t numProtocols = protocolList.numProtocols(visitor);
+ for ( uint64_t protocolIndex = 0; protocolIndex != numProtocols; ++protocolIndex ) {
+ objc_visitor::Protocol protocol = protocolList.getProtocol(visitor, protocolIndex);
+ const char* name = protocol.getName(visitor);
+ printf(" %s\n", name);
+ }
+ printf("}\n");
+ }
+ }
+ // property lists
+ {
+ objc_visitor::PropertyList propertyList = objcClass.getBaseProperties(visitor);
+ if ( propertyList.isListOfLists() ) {
+ const ListOfListsEntry* listHeader = (ListOfListsEntry*)((uint8_t*) ((uint64_t)propertyList.getLocation() & ~1));
+ VMAddress propertyListVMAddr = propertyList.getVMAddress().value() - VMOffset(1ULL);
+
+ printf("(list of %d lists) {\n", listHeader->count);
+ for ( uint32_t i = 0; i != listHeader->count; ++i ) {
+ const ListOfListsEntry& listEntry = (listHeader + 1)[i];
+
+ // The list entry is a relative offset to the target
+ // Work out the VMAddress of that target
+ VMOffset listEntryVMOffset{(uint64_t)&listEntry - (uint64_t)listHeader};
+ VMAddress listEntryVMAddr = propertyListVMAddr + listEntryVMOffset;
+ VMAddress targetVMAddr = listEntryVMAddr + VMOffset((uint64_t)listEntry.offset);
+
+ auto categoryIt = categoryMap.find(targetVMAddr);
+ if ( categoryIt != categoryMap.end() ) {
+ seenCategories.insert(targetVMAddr);
+ printf(" (category properties: image (%d) %s) {\n", listEntry.imageIndex, categoryIt->second.c_str());
+
+ metadata_visitor::ResolvedValue catPropertyListValue = visitor.getValueFor(targetVMAddr);
+ objc_visitor::PropertyList catPropertyList(catPropertyListValue);
+ uint32_t numProperties = catPropertyList.numProperties();
+ for ( uint32_t propertyIndex = 0; propertyIndex != numProperties; ++propertyIndex ) {
+ objc_visitor::Property property = catPropertyList.getProperty(visitor, propertyIndex);
+ const char* name = property.getName(visitor);
+ printf(" %s\n", name);
+ }
+
+ printf(" }\n");
+ } else {
+ // If we didn't find a category then we must be processing the class
+ // properties. These have to be last
+ if ( (i + 1) != listHeader->count ) {
+ fprintf(stderr, "Invalid property list on %s in %s\n", className, installName);
+ exit(1);
+ }
+ printf(" (class properties: image (%d)) {\n", listEntry.imageIndex);
+
+ metadata_visitor::ResolvedValue classPropertyListValue = visitor.getValueFor(targetVMAddr);
+ objc_visitor::PropertyList classPropertyList(classPropertyListValue);
+ uint32_t numProperties = classPropertyList.numProperties();
+ for ( uint32_t propertyIndex = 0; propertyIndex != numProperties; ++propertyIndex ) {
+ objc_visitor::Property property = classPropertyList.getProperty(visitor, propertyIndex);
+ const char* name = property.getName(visitor);
+ printf(" %s\n", name);
+ }
+
+ printf(" }\n");
+ }
+ }
+ printf("}\n");
+ } else {
+ printf("(class properties) {\n");
+ uint32_t numProperties = propertyList.numProperties();
+ for ( uint32_t propertyIndex = 0; propertyIndex != numProperties; ++propertyIndex ) {
+ objc_visitor::Property property = propertyList.getProperty(visitor, propertyIndex);
+ const char* name = property.getName(visitor);
+ printf(" %s\n", name);
+ }
+ printf("}\n");
+ }
+ }
+ });
+ });
+
+ // Check if any categories weren't attached
+ bool badCategory = false;
+ for ( auto& [vmAddr, name] : categoryMap ) {
+ if ( seenCategories.count(vmAddr) )
+ continue;
+
+ badCategory = true;
+ fprintf(stderr, "Failed to find class with category: %s\n", name.c_str());
+ }
+
+ if ( badCategory )
+ exit(1);
+}
+
+static bool patchKindIsRootOptimized(PatchKind patchKind)
+{
+ return (patchKind == PatchKind::cfObj2) || (patchKind == PatchKind::objcClass);
+}
+
+struct PatchPageMetric
+{
+ std::unordered_set<uint64_t> pages;
+ size_t numUses = 0;
+
+ void addUse(uint64_t cacheOffset)
+ {
+ ++numUses;
+ pages.insert(cacheOffset & ~0x3FFF);
+ }
+};
+
+static void logCostOfRootPerSymbol(const std::unordered_map<CString, PatchPageMetric>& pagesPerSymbol)
+{
+ printf("\n%ld symbols page coverage:\n", pagesPerSymbol.size());
+
+ struct Metric
+ {
+ CString symName;
+ size_t numPages = 0;
+ size_t numUses = 0;
+ };
+
+ std::vector<Metric> metrics;
+ metrics.reserve(pagesPerSymbol.size());
+
+ std::ranges::transform(pagesPerSymbol, std::back_inserter(metrics), [](auto& entry) {
+ return Metric{entry.first, (size_t)entry.second.pages.size(), entry.second.numUses};
+ });
+ std::ranges::sort(metrics, [](auto& l, auto& r) {
+ if ( l.numPages == r.numPages )
+ return l.symName < r.symName;
+ return l.numPages < r.numPages;
+ });
+
+ for ( auto& metric : metrics )
+ printf("%s is on %ld pages, %ld uses\n", metric.symName.c_str(), metric.numPages, metric.numUses);
+}
+
+int main (int argc, const char* argv[]) {
+
+ const char* sharedCachePath = nullptr;
+
+ Options options;
+ options.mode = modeNone;
+ options.printUUIDs = false;
+ options.printVMAddrs = false;
+ options.printDylibVersions = false;
+ options.printInodes = false;
+ options.dependentsOfPath = NULL;
+ options.extractionDir = NULL;
+
+ bool printStrings = false;
+ bool printExports = false;
+
+ for (uint32_t i = 1; i < argc; i++) {
+ const char* opt = argv[i];
+ if (opt[0] == '-') {
+ if (strcmp(opt, "-list") == 0) {
+ checkMode(options.mode);
+ options.mode = modeList;
+ }
+ else if (strcmp(opt, "-dependents") == 0) {
+ checkMode(options.mode);
+ options.mode = modeDependencies;
+ options.dependentsOfPath = argv[++i];
+ if ( i >= argc ) {
+ fprintf(stderr, "Error: option -depdendents requires an argument\n");
+ usage();
+ exit(1);
+ }
+ }
+ else if (strcmp(opt, "-linkedit") == 0) {
+ checkMode(options.mode);
+ options.mode = modeLinkEdit;
+ }
+ else if (strcmp(opt, "-info") == 0) {
+ checkMode(options.mode);
+ options.mode = modeInfo;
+ }
+ else if (strcmp(opt, "-tpro") == 0) {
+ checkMode(options.mode);
+ options.mode = modeTPROInfo;
+ }
+ else if (strcmp(opt, "-stats") == 0) {
+ checkMode(options.mode);
+ options.mode = modeStats;
+ }
+ else if (strcmp(opt, "-slide_info") == 0) {
+ checkMode(options.mode);
+ options.mode = modeSlideInfo;
+ }
+ else if (strcmp(opt, "-verbose_slide_info") == 0) {
+ checkMode(options.mode);
+ options.mode = modeVerboseSlideInfo;
+ }
+ else if (strcmp(opt, "-fixups_in_dylib") == 0) {
+ checkMode(options.mode);
+ options.mode = modeFixupsInDylib;
+ options.fixupsInDylib = argv[++i];
+ if ( i >= argc ) {
+ fprintf(stderr, "Error: option -fixups_in_dylib requires a path argument\n");
+ usage();
+ exit(1);
+ }
+ }
+ else if (strcmp(opt, "-text_info") == 0) {
+ checkMode(options.mode);
+ options.mode = modeTextInfo;
+ }
+ else if (strcmp(opt, "-local_symbols") == 0) {
+ checkMode(options.mode);
+ options.mode = modeLocalSymbols;
+ }
+ else if (strcmp(opt, "-strings") == 0) {
+ if (options.mode != modeStrings)
+ checkMode(options.mode);
+ options.mode = modeStrings;
+ printStrings = true;
+ }
+ else if (strcmp(opt, "-sections") == 0) {
+ checkMode(options.mode);
+ options.mode = modeSectionSizes;
+ }
+ else if (strcmp(opt, "-exports") == 0) {
+ if (options.mode != modeStrings)
+ checkMode(options.mode);
+ options.mode = modeStrings;
+ printExports = true;
+ }
+ else if (strcmp(opt, "-duplicate_exports") == 0) {
+ options.mode = modeDuplicates;
+ }
+ else if (strcmp(opt, "-duplicate_exports_summary") == 0) {
+ options.mode = modeDuplicatesSummary;
+ }
+ else if (strcmp(opt, "-map") == 0) {
+ checkMode(options.mode);
+ options.mode = modeMap;
+ }
+ else if (strcmp(opt, "-json-map") == 0) {
+ checkMode(options.mode);
+ options.mode = modeJSONMap;
+ }
+ else if (strcmp(opt, "-verbose-json-map") == 0) {
+ checkMode(options.mode);
+ options.mode = modeVerboseJSONMap;
+ }
+ else if (strcmp(opt, "-json-dependents") == 0) {
+ checkMode(options.mode);
+ options.mode = modeJSONDependents;
+ }
+ else if (strcmp(opt, "-size") == 0) {
+ checkMode(options.mode);
+ options.mode = modeSize;
+ }
+ else if (strcmp(opt, "-objc-info") == 0) {
+ checkMode(options.mode);
+ options.mode = modeObjCInfo;
+ }
+ else if (strcmp(opt, "-objc-protocols") == 0) {
+ checkMode(options.mode);
+ options.mode = modeObjCProtocols;
+ }
+ else if (strcmp(opt, "-objc-imp-caches") == 0) {
+ checkMode(options.mode);
+ options.mode = modeObjCImpCaches;
+ }
+ else if (strcmp(opt, "-objc-classes") == 0) {
+ checkMode(options.mode);
+ options.mode = modeObjCClasses;
+ }
+ else if (strcmp(opt, "-objc-class-layout") == 0) {
+ checkMode(options.mode);
+ options.mode = modeObjCClassLayout;
+ }
+ else if (strcmp(opt, "-objc-class-method-lists") == 0) {
+ checkMode(options.mode);
+ options.mode = modeObjCClassMethodLists;
+ }
+ else if (strcmp(opt, "-objc-class-hash-table") == 0) {
+ checkMode(options.mode);
+ options.mode = modeObjCClassHashTable;
+ }
+ else if (strcmp(opt, "-objc-selectors") == 0) {
+ checkMode(options.mode);
+ options.mode = modeObjCSelectors;
+ }
+ else if (strcmp(opt, "-fs-root") == 0) {
+ options.rootPath = argv[++i];
+ }
+ else if (strcmp(opt, "-swift-proto") == 0) {
+ checkMode(options.mode);
+ options.mode = modeSwiftProtocolConformances;
+ }
+ else if (strcmp(opt, "-swift-ptrtables") == 0) {
+ checkMode(options.mode);
+ options.mode = modeSwiftPtrTables;
+ }
+ else if (strcmp(opt, "-lookup-va") == 0) {
+ checkMode(options.mode);
+ options.mode = modeLookupVA;
+ options.lookupVA = argv[++i];
+ if ( i >= argc ) {
+ fprintf(stderr, "Error: option -lookup-va requires an address argument\n");
+ usage();
+ exit(1);
+ }
+ }
+ else if (strcmp(opt, "-extract") == 0) {
+ checkMode(options.mode);
+ options.mode = modeExtract;
+ options.extractionDir = argv[++i];
+ if ( i >= argc ) {
+ fprintf(stderr, "Error: option -extract requires a directory argument\n");
+ usage();
+ exit(1);
+ }
+ }
+ else if (strcmp(opt, "-uuid") == 0) {
+ options.printUUIDs = true;
+ }
+ else if (strcmp(opt, "-inode") == 0) {
+ options.printInodes = true;
+ }
+ else if (strcmp(opt, "-versions") == 0) {
+ options.printDylibVersions = true;
+ }
+ else if (strcmp(opt, "-vmaddr") == 0) {
+ options.printVMAddrs = true;
+ }
+ else if (strcmp(opt, "-patch_table") == 0) {
+ options.mode = modePatchTable;
+ }
+ else if (strcmp(opt, "-dump_patch_table") == 0) {
+ options.mode = modeDumpPatchTable;
+ }
+ else if (strcmp(opt, "-function_variants") == 0) {
+ options.mode = modeFunctionVariants;
+ }
+ else if (strcmp(opt, "-roots_cost") == 0) {
+ checkMode(options.mode);
+ options.mode = modeRootsCost;
+ options.rootsCostOfDylib = argv[++i];
+ if ( i >= argc ) {
+ fprintf(stderr, "Error: option -roots_cost requires a path argument\n");
+ usage();
+ exit(1);
+ }
+ }
+ else if (strcmp(opt, "-list_dylibs_with_section") == 0) {
+ options.mode = modeListDylibsWithSection;
+ options.segmentName = argv[++i];
+ options.sectionName = argv[++i];
+ if ( i >= argc ) {
+ fprintf(stderr, "Error: option -list_dylibs_with_section requires a segment and section name\n");
+ usage();
+ exit(1);
+ }
+ }
+ else if (strcmp(opt, "-mach_headers") == 0) {
+ checkMode(options.mode);
+ options.mode = modeMachHeaders;
+ }
+ else if (strcmp(opt, "-load_commands") == 0) {
+ fprintf(stderr, "dyld_shared_cache_util -load_commands is deprecated. Use dyld_info -load_commands instead\n");
+ }
+ else if (strcmp(opt, "-cache_header") == 0) {
+ checkMode(options.mode);
+ options.mode = modeCacheHeader;
+ }
+ else if (strcmp(opt, "-dylib_symbols") == 0) {
+ checkMode(options.mode);
+ options.mode = modeDylibSymbols;
+ }
+ else if (strcmp(opt, "-function_starts") == 0) {
+ options.mode = modeFunctionStarts;
+ }
+ else if (strcmp(opt, "-prewarming_data") == 0) {
+ options.mode = modePrewarmingData;
+ }
+ else {
+ fprintf(stderr, "Error: unrecognized option %s\n", opt);
+ usage();
+ exit(1);
+ }
+ }
+ else {
+ sharedCachePath = opt;
+ }
+ }
+
+ if ( options.mode == modeNone ) {
+ fprintf(stderr, "Error: no command selected\n");
+ usage();
+ exit(1);
+ }
+
+ if ( options.mode != modeSlideInfo && options.mode != modeVerboseSlideInfo ) {
+ if ( options.printUUIDs && (options.mode != modeList) )
+ fprintf(stderr, "Warning: -uuid option ignored outside of -list mode\n");
+
+ if ( options.printVMAddrs && (options.mode != modeList) )
+ fprintf(stderr, "Warning: -vmaddr option ignored outside of -list mode\n");
+
+ if ( options.printDylibVersions && (options.mode != modeDependencies) )
+ fprintf(stderr, "Warning: -versions option ignored outside of -dependents mode\n");
+
+ if ( (options.mode == modeDependencies) && (options.dependentsOfPath == NULL) ) {
+ fprintf(stderr, "Error: -dependents given, but no dylib path specified\n");
+ usage();
+ exit(1);
+ }
+ }
+
+ __block std::vector<const DyldSharedCache*> dyldCaches;
+
+ const DyldSharedCache* dyldCache = nullptr;
+ bool cacheOnDisk = false;
+ if ( sharedCachePath != nullptr ) {
+ dyldCaches = DyldSharedCache::mapCacheFiles(sharedCachePath);
+ // mapCacheFile prints an error if something goes wrong, so just return in that case.
+ if ( dyldCaches.empty() )
+ return 1;
+ dyldCache = dyldCaches.front();
+ cacheOnDisk = true;
+ }
+ else {
+ size_t cacheLength;
+ dyldCache = (DyldSharedCache*)_dyld_get_shared_cache_range(&cacheLength);
+ if (dyldCache == nullptr) {
+ fprintf(stderr, "Could not get in-memory shared cache\n");
+ return 1;
+ }
+ if ( options.mode == modeObjCClasses ) {
+ fprintf(stderr, "Cannot use -objc-classes with a live cache. Please run with a path to an on-disk cache file\n");
+ return 1;
+ }
+ if ( options.mode == modeObjCClassLayout ) {
+ fprintf(stderr, "Cannot use -objc-class-layout with a live cache. Please run with a path to an on-disk cache file\n");
+ return 1;
+ }
+ if ( options.mode == modeObjCClassMethodLists ) {
+ fprintf(stderr, "Cannot use -objc-class-method-lists with a live cache. Please run with a path to an on-disk cache file\n");
+ return 1;
+ }
+ if ( options.mode == modeVerboseSlideInfo ) {
+ fprintf(stderr, "Cannot use -verbose_slide_info with a live cache. Please run with a path to an on-disk cache file\n");
+ return 1;
+ }
+
+
+ // The in-use cache might be the first cache file of many. In that case, also add the sub caches
+ dyldCache->forEachCache(^(const DyldSharedCache *cache, bool& stopCache) {
+ dyldCaches.push_back(dyldCache);
+ });
+ cacheOnDisk = false;
+ }
+
+ if ( options.mode == modeSlideInfo || options.mode == modeVerboseSlideInfo ) {
+ if ( dyldCache->numSubCaches() == 0 ) {
+ if ( !dyldCache->hasSlideInfo() ) {
+ fprintf(stderr, "Error: dyld shared cache does not contain slide info\n");
+ exit(1);
+ }
+ }
+
+ const bool verboseSlideInfo = (options.mode == modeVerboseSlideInfo);
+ dyldCache->forEachCache(^(const DyldSharedCache *cache, bool& stopCache) {
+ cache->forEachSlideInfo(^(uint64_t mappingStartAddress, uint64_t mappingSize, const uint8_t *mappingPagesStart,
+ uint64_t slideInfoOffset, uint64_t slideInfoSize, const dyld_cache_slide_info *slideInfoHeader) {
+ printSlideInfoForDataRegion(cache, mappingStartAddress, mappingSize, mappingPagesStart,
+ slideInfoHeader, verboseSlideInfo);
+ });
+ });
+ return 0;
+ }
+ else if ( options.mode == modeFixupsInDylib ) {
+ if ( dyldCache->numSubCaches() == 0 ) {
+ if ( !dyldCache->hasSlideInfo() ) {
+ fprintf(stderr, "Error: dyld shared cache does not contain slide info\n");
+ exit(1);
+ }
+ }
+
+ uint32_t imageIndex = ~0U;
+ if ( !dyldCache->hasImagePath(options.fixupsInDylib, imageIndex) ) {
+ fprintf(stderr, "Error: dyld shared cache does not contain image: %s\n",
+ options.fixupsInDylib);
+ exit(1);
+ }
+
+ const Header* hdr = (const Header*)dyldCache->getIndexedImageEntry(imageIndex);
+
+ __block std::vector<SegmentInfo> dylibSegInfo;
+ buildSegmentInfo(hdr, dylibSegInfo);
+ sortSegmentInfo(dylibSegInfo);
+
+ __block std::vector<SegmentInfo> cacheSegInfo;
+ buildSegmentInfo(dyldCache, cacheSegInfo);
+
+ uint64_t cacheBaseAddress = dyldCache->unslidLoadAddress();
+ auto handler = ^(uint64_t fixupVMAddr, uint64_t targetVMAddr,
+ PointerMetaData pmd)
+ {
+ SegmentInfo fixupAt;
+ if ( !findImageAndSegment(dyldCache, dylibSegInfo, fixupVMAddr - cacheBaseAddress, &fixupAt) ) {
+ // Fixup is not in the given dylib
+ return;
+ }
+
+ // Remove high8 if we have it
+ uint64_t high8 = targetVMAddr >> 56;
+ targetVMAddr = targetVMAddr & 0x00FFFFFFFFFFFFFF;
+
+ SegmentInfo targetAt;
+ if ( !findImageAndSegment(dyldCache, cacheSegInfo, targetVMAddr - cacheBaseAddress, &targetAt) ) {
+ return;
+ }
+
+ if ( pmd.authenticated ) {
+ static const char* keyNames[] = {
+ "IA", "IB", "DA", "DB"
+ };
+ printf("%.*s(0x%04llX) -> %.*s(0x%04llX):%s; (PAC: div=%d, addr=%s, key=%s)\n",
+ (int)fixupAt.segName.size(), fixupAt.segName.data(), fixupVMAddr - fixupAt.vmAddr,
+ (int)targetAt.segName.size(), targetAt.segName.data(), targetVMAddr - targetAt.vmAddr, targetAt.installName,
+ pmd.diversity, pmd.usesAddrDiversity ? "true" : "false", keyNames[pmd.key]);
+ } else {
+ if ( high8 != 0 ) {
+ printf("%.*s(0x%04llX) -> %.*s(0x%04llX):%s; (high8: 0x%02llX)\n",
+ (int)fixupAt.segName.size(), fixupAt.segName.data(), fixupVMAddr - fixupAt.vmAddr,
+ (int)targetAt.segName.size(), targetAt.segName.data(), targetVMAddr - targetAt.vmAddr, targetAt.installName,
+ high8);
+ } else {
+ printf("%.*s(0x%04llX) -> %.*s(0x%04llX):%s\n",
+ (int)fixupAt.segName.size(), fixupAt.segName.data(), fixupVMAddr - fixupAt.vmAddr,
+ (int)targetAt.segName.size(), targetAt.segName.data(), targetVMAddr - targetAt.vmAddr, targetAt.installName);
+ }
+ }
+ };
+
+ dyldCache->forEachCache(^(const DyldSharedCache *cache, bool& stopCache) {
+ cache->forEachSlideInfo(^(uint64_t mappingStartAddress, uint64_t mappingSize, const uint8_t *mappingPagesStart,
+ uint64_t slideInfoOffset, uint64_t slideInfoSize, const dyld_cache_slide_info *slideInfoHeader) {
+ forEachSlidValue(cache, mappingStartAddress, mappingSize, mappingPagesStart,
+ slideInfoHeader, handler);
+ });
+ });
+ return 0;
+ }
+ else if ( options.mode == modeInfo ) {
+ const dyld_cache_header* header = &dyldCache->header;
+ uuid_string_t uuidString;
+ uuid_unparse_upper(header->uuid, uuidString);
+ printf("uuid: %s\n", uuidString);
+ printf("platform: %s\n", dyldCache->platform().name().c_str());
+ printf("built by: %s\n", header->locallyBuiltCache ? "local machine" : "B&I");
+ printf("cache type: %s\n", DyldSharedCache::getCacheTypeName(header->cacheType));
+ if ( header->dylibsExpectedOnDisk )
+ printf("dylibs expected on disk: true\n");
+ if ( header->cacheType == kDyldSharedCacheTypeUniversal )
+ printf("cache sub-type: %s\n", DyldSharedCache::getCacheTypeName(header->cacheSubType));
+ if ( header->mappingOffset >= offsetof(dyld_cache_header, imagesCount) ) {
+ printf("image count: %u\n", header->imagesCount);
+ } else {
+ printf("image count: %u\n", header->imagesCountOld);
+ }
+ if ( (header->mappingOffset >= 0x78) && (header->branchPoolsOffset != 0) ) {
+ printf("branch pool count: %u\n", header->branchPoolsCount);
+ }
+ {
+ uint32_t pageSize = 0x4000; // fix me for intel
+ uint32_t possibleSlideValues = (uint32_t)(header->maxSlide/pageSize);
+ uint32_t entropyBits = 0;
+ if ( possibleSlideValues > 1 )
+ entropyBits = __builtin_clz(possibleSlideValues - 1);
+ printf("ASLR entropy: %u-bits (%lldMB)\n", entropyBits, header->maxSlide >> 20);
+ }
+ printf("mappings:\n");
+ dyldCache->forEachRange(^(const char *mappingName, uint64_t unslidVMAddr, uint64_t vmSize,
+ uint32_t cacheFileIndex, uint64_t fileOffset, uint32_t initProt, uint32_t maxProt, bool& stopRange) {
+ std::string initProtString;
+ initProtString += (initProt & VM_PROT_READ) ? "r" : "-";
+ initProtString += (initProt & VM_PROT_WRITE) ? "w" : "-";
+ initProtString += (initProt & VM_PROT_EXECUTE) ? "x" : "-";
+
+ std::string maxProtString;
+ maxProtString += (maxProt & VM_PROT_READ) ? "r" : "-";
+ maxProtString += (maxProt & VM_PROT_WRITE) ? "w" : "-";
+ maxProtString += (maxProt & VM_PROT_EXECUTE) ? "x" : "-";
+
+ printf("%20s %4lluMB, file offset: #%u/0x%08llX -> 0x%08llX, address: 0x%08llX -> 0x%08llX, %s -> %s\n",
+ mappingName, vmSize / (1024*1024), cacheFileIndex, fileOffset, fileOffset + vmSize,
+ unslidVMAddr, unslidVMAddr + vmSize, initProtString.c_str(), maxProtString.c_str());
+ if (header->mappingOffset >= offsetof(dyld_cache_header, dynamicDataOffset)) {
+ if ( (unslidVMAddr + vmSize) == (header->sharedRegionStart + header->dynamicDataOffset) ) {
+ printf(" dynamic config %4lluKB, address: 0x%08llX -> 0x%08llX\n",
+ header->dynamicDataMaxSize/1024, header->sharedRegionStart + header->dynamicDataOffset,
+ header->sharedRegionStart + header->dynamicDataOffset + header->dynamicDataMaxSize);
+ }
+ }
+ }, ^(const DyldSharedCache* subCache, uint32_t cacheFileIndex) {
+ const dyld_cache_header* subCacheHeader = &subCache->header;
+
+ if ( subCacheHeader->codeSignatureSize != 0) {
+ printf("%20s %4lluMB, file offset: #%u/0x%08llX -> 0x%08llX\n",
+ "code sign", subCacheHeader->codeSignatureSize/(1024*1024), cacheFileIndex,
+ subCacheHeader->codeSignatureOffset, subCacheHeader->codeSignatureOffset + subCacheHeader->codeSignatureSize);
+ }
+
+ if ( subCacheHeader->mappingOffset > offsetof(dyld_cache_header, rosettaReadOnlySize) ) {
+ if ( subCacheHeader->rosettaReadOnlySize != 0 ) {
+ printf("Rosetta RO: %4lluMB, address: 0x%08llX -> 0x%08llX\n",
+ subCacheHeader->rosettaReadOnlySize/(1024*1024), subCacheHeader->rosettaReadOnlyAddr,
+ subCacheHeader->rosettaReadOnlyAddr + subCacheHeader->rosettaReadOnlySize);
+ }
+ if ( subCacheHeader->rosettaReadWriteSize != 0 ) {
+ printf("Rosetta RW: %4lluMB, address: 0x%08llX -> 0x%08llX\n",
+ subCacheHeader->rosettaReadWriteSize/(1024*1024), subCacheHeader->rosettaReadWriteAddr,
+ subCacheHeader->rosettaReadWriteAddr + subCacheHeader->rosettaReadWriteSize);
+ }
+ }
+
+ subCache->forEachSlideInfo(^(uint64_t mappingStartAddress, uint64_t mappingSize, const uint8_t *mappingPagesStart,
+ uint64_t slideInfoOffset, uint64_t slideInfoSize, const dyld_cache_slide_info *slideInfoHeader) {
+
+ printf("slide info: %4lluKB, file offset: #%u/0x%08llX -> 0x%08llX\n",
+ slideInfoSize/1024, cacheFileIndex, slideInfoOffset, slideInfoOffset + slideInfoSize);
+ });
+ if ( subCacheHeader->localSymbolsOffset != 0 )
+ printf("local symbols: %3lluMB, file offset: #%u/0x%08llX -> 0x%08llX\n",
+ subCacheHeader->localSymbolsSize/(1024*1024), cacheFileIndex,
+ subCacheHeader->localSymbolsOffset, subCacheHeader->localSymbolsOffset + subCacheHeader->localSymbolsSize);
+ });
+ }
+ else if ( options.mode == modeTPROInfo ) {
+ printf("TPRO mappings:\n");
+ __block bool foundMapping = false;
+ dyldCache->forEachTPRORegion(^(const void *content, uint64_t unslidVMAddr, uint64_t vmSize, bool &stopRegion) {
+ printf(" %4lluKB, address: 0x%08llX -> 0x%08llX\n", vmSize / 1024, unslidVMAddr, unslidVMAddr + vmSize);
+ foundMapping = true;
+ });
+ if ( !foundMapping )
+ printf(" none found\n");
+ }
+ else if ( options.mode == modeStats ) {
+ __block std::map<std::string_view, uint64_t> mappingSizes;
+ __block uint64_t totalFileSize = 0;
+ __block uint64_t minVMAddr = UINT64_MAX;
+ __block uint64_t maxVMAddr = 0;
+
+ dyldCache->forEachRange(^(const char *mappingName, uint64_t unslidVMAddr, uint64_t vmSize,
+ uint32_t cacheFileIndex, uint64_t fileOffset, uint32_t initProt, uint32_t maxProt, bool& stopRange) {
+ mappingSizes[mappingName] += vmSize;
+ totalFileSize += vmSize;
+ minVMAddr = std::min(minVMAddr, unslidVMAddr);
+ maxVMAddr = std::max(maxVMAddr, unslidVMAddr + vmSize);
+ }, nullptr);
+
+ uint64_t totalVMSize = maxVMAddr - minVMAddr;
+
+ printf("-stats:\n");
+ printf(" total file size: %lldMB\n", totalFileSize >> 20);
+ printf(" total VM size: %lldMB\n", totalVMSize >> 20);
+ for ( const auto& mappingNameAndSize : mappingSizes )
+ printf(" total VM size (%s): %lldMB\n", mappingNameAndSize.first.data(), mappingNameAndSize.second >> 20);
+ }
+ else if ( options.mode == modeTextInfo ) {
+ const dyld_cache_header* header = &dyldCache->header;
+ printf("dylib text infos (count=%llu):\n", header->imagesTextCount);
+ dyldCache->forEachImageTextSegment(^(uint64_t loadAddressUnslid, uint64_t textSegmentSize, const unsigned char *dylibUUID, const char *installName, bool &stop) {
+ uuid_string_t uuidString;
+ uuid_unparse_upper(dylibUUID, uuidString);
+ printf(" 0x%09llX -> 0x%09llX <%s> %s\n", loadAddressUnslid, loadAddressUnslid + textSegmentSize, uuidString, installName);
+ });
+ }
+ else if ( options.mode == modeLocalSymbols ) {
+ if ( !dyldCache->hasLocalSymbolsInfo() && !dyldCache->hasLocalSymbolsInfoFile() ) {
+ fprintf(stderr, "Error: dyld shared cache does not contain local symbols info\n");
+ exit(1);
+ }
+
+ if ( sharedCachePath == nullptr ) {
+ fprintf(stderr, "Cannot use -local_symbols with a live cache. Please run with a path to an on-disk cache file\n");
+ exit(1);
+ }
+
+ // The locals are in an unmapped part of the cache. So use the introspection APIs to map them in
+ // For now only support the case where the cache was passed in as a file, not the live cache
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wunguarded-availability-new"
+ const bool is64 = (strstr(dyldCache->archName(), "64") != nullptr) && (strstr(dyldCache->archName(), "64_32") == nullptr);
+ bool mappedCacheFile = dyld_shared_cache_for_file(sharedCachePath, ^(dyld_shared_cache_t cache) {
+ __block uint32_t entriesCount = 0;
+ dyld_shared_cache_for_each_image(cache, ^(dyld_image_t image) {
+ // FIXME: Use dyld_image_get_file_path(image) when its available
+ const char* imageName = dyldCache->getIndexedImagePath(entriesCount);
+ bool foundNList = dyld_image_local_nlist_content_4Symbolication(image,
+ ^(const void* nlistStart, uint64_t nlistCount,
+ const char* stringTable) {
+ printf("Local symbols nlist for: %s\n", imageName);
+ if ( is64 ) {
+ const nlist_64* symTab = (nlist_64*)nlistStart;
+ for (int e = 0; e < nlistCount; ++e) {
+ const nlist_64* entry = &symTab[e];
+ printf(" nlist[%d].str=%d, %s\n", e, entry->n_un.n_strx, &stringTable[entry->n_un.n_strx]);
+ printf(" nlist[%d].value=0x%0llX\n", e, entry->n_value);
+ }
+ } else {
+ const struct nlist* symTab = (struct nlist*)nlistStart;
+ for (int e = 0; e < nlistCount; ++e) {
+ const struct nlist* entry = &symTab[e];
+ printf(" nlist[%d].str=%d, %s\n", e, entry->n_un.n_strx, &stringTable[entry->n_un.n_strx]);
+ printf(" nlist[%d].value=0x%0X\n", e, entry->n_value);
+ }
+ }
+ });
+ if ( !foundNList ) {
+ fprintf(stderr, "Error: Failed to find local symbols nlist for: %s\n", imageName);
+ exit(1);
+ }
+ entriesCount++;
+ });
+ printf("local symbols by dylib (count=%d):\n", entriesCount);
+ });
+
+ if ( !mappedCacheFile ) {
+ fprintf(stderr, "Error: Failed to map local symbols for shared cache file\n");
+ exit(1);
+ }
+#pragma clang diagnostic pop
+
+#if 0
+ const bool is64 = (strstr(dyldCache->archName(), "64") != NULL);
+ const uint32_t nlistFileOffset = (uint32_t)((uint8_t*)dyldCache->getLocalNlistEntries() - (uint8_t*)dyldCache);
+ const uint32_t nlistCount = dyldCache->getLocalNlistCount();
+ const uint32_t nlistByteSize = is64 ? nlistCount*16 : nlistCount*12;
+ const char* localStrings = dyldCache->getLocalStrings();
+ const uint32_t stringsFileOffset = (uint32_t)((uint8_t*)localStrings - (uint8_t*)dyldCache);
+ const uint32_t stringsSize = dyldCache->getLocalStringsSize();
+
+ printf("local symbols nlist array: %3uMB, file offset: 0x%08X -> 0x%08X\n", nlistByteSize/(1024*1024), nlistFileOffset, nlistFileOffset+nlistByteSize);
+ printf("local symbols string pool: %3uMB, file offset: 0x%08X -> 0x%08X\n", stringsSize/(1024*1024), stringsFileOffset, stringsFileOffset+stringsSize);
+
+ __block uint32_t entriesCount = 0;
+ dyldCache->forEachLocalSymbolEntry(^(uint64_t dylibCacheVMOffset, uint32_t nlistStartIndex, uint32_t nCount, bool &stop) {
+ const char* imageName = dyldCache->getIndexedImagePath(entriesCount);
+ printf(" nlistStartIndex=%5d, nlistCount=%5d, image=%s\n", nlistStartIndex, nCount, imageName);
+#if 0
+ if ( is64 ) {
+ const nlist_64* symTab = (nlist_64*)((char*)dyldCache + nlistFileOffset);
+ for (int e = 0; e < nlistLocalCount; ++e) {
+ const nlist_64* entry = &symTab[nlistStartIndex + e];
+ printf(" nlist[%d].str=%d, %s\n", e, entry->n_un.n_strx, &localStrings[entry->n_un.n_strx]);
+ printf(" nlist[%d].value=0x%0llX\n", e, entry->n_value);
+ }
+ }
+#endif
+ entriesCount++;
+ });
+ printf("local symbols by dylib (count=%d):\n", entriesCount);
+#endif
+ }
+ else if ( (options.mode == modeJSONMap) || (options.mode == modeVerboseJSONMap) ) {
+ bool verbose = (options.mode == modeVerboseJSONMap);
+ uuid_t uuid;
+ dyldCache->getUUID(uuid);
+ std::string buffer = dyldCache->generateJSONMap("unknown", uuid, verbose);
+ printf("%s\n", buffer.c_str());
+ }
+ else if ( options.mode == modeJSONDependents ) {
+ std::cout << dyldCache->generateJSONDependents();
+ }
+ else if ( options.mode == modeStrings ) {
+ if (printStrings) {
+ // The cache has not been slid if we loaded it from disk
+ bool cacheRebased = (sharedCachePath == nullptr);
+ dyld3::MachOAnalyzer::VMAddrConverter vmAddrConverter = dyldCache->makeVMAddrConverter(cacheRebased);
+
+ uint64_t sharedCacheRelativeSelectorBaseVMAddress = dyldCache->sharedCacheRelativeSelectorBaseVMAddress();
+
+ dyldCache->forEachImage(^(const Header *hdr, const char *installName) {
+ __block std::unordered_set<std::string_view> seenStrings;
+ const dyld3::MachOAnalyzer* ma = (dyld3::MachOAnalyzer*)hdr;
+ int64_t slide = ma->getSlide();
+ uint32_t pointerSize = ma->pointerSize();
+
+ ((const Header*)ma)->forEachSection(^(const Header::SectionInfo& info, bool& stop) {
+ if ( ( (info.flags & SECTION_TYPE) == S_CSTRING_LITERALS ) ) {
+ const uint8_t* content = (uint8_t*)(info.address + slide);
+ const char* s = (char*)content;
+ const char* end = s + info.size;
+ while ( s < end ) {
+ printf("%s: %s\n", installName, s);
+ seenStrings.insert(s);
+ while (*s != '\0' )
+ ++s;
+ ++s;
+ }
+ }
+ });
+
+ // objc string sections are coalesced in the builder, so might not be present above
+ // Find referenced objc strings by walking the other objc metadata
+ auto printString = ^(uint64_t stringVMAddr) {
+ const char* selString = (const char*)stringVMAddr + slide;
+ auto itAndInserted = seenStrings.insert(selString);
+ if ( itAndInserted.second )
+ printf("%s: %s\n", installName, selString);
+ };
+
+ auto visitMethod = ^(uint64_t methodVMAddr, const dyld3::MachOAnalyzer::ObjCMethod& method,
+ bool& stopMethod) {
+ printString(method.nameVMAddr);
+ printString(method.typesVMAddr);
+ };
+
+ auto visitProperty = ^(uint64_t propertyVMAddr, const dyld3::MachOAnalyzer::ObjCProperty& property) {
+ printString(property.nameVMAddr);
+ };
+
+ Diagnostics diag;
+ ma->forEachObjCSelectorReference(diag, vmAddrConverter,
+ ^(uint64_t selRefVMAddr, uint64_t selRefTargetVMAddr, bool &stop) {
+ printString(selRefTargetVMAddr);
+ });
+
+ // If the cache hasn't been rebased, then we can also print other objc metadata, such as classes
+ // If we are doing this, then we need to patch the cache to undo the bit-stealing in the ASLR format
+ if ( !cacheRebased ) {
+ auto visitClass = ^(uint64_t classVMAddr,
+ uint64_t classSuperclassVMAddr, uint64_t classDataVMAddr,
+ const dyld3::MachOAnalyzer::ObjCClassInfo& objcClass, bool isMetaClass,
+ bool& stop) {
+ printString(objcClass.nameVMAddr(pointerSize));
+ ma->forEachObjCMethod(objcClass.baseMethodsVMAddr(pointerSize), vmAddrConverter, sharedCacheRelativeSelectorBaseVMAddress, visitMethod);
+ ma->forEachObjCProperty(objcClass.basePropertiesVMAddr(pointerSize), vmAddrConverter, visitProperty);
+ };
+
+ auto visitCategory = ^(uint64_t categoryVMAddr,
+ const dyld3::MachOAnalyzer::ObjCCategory& objcCategory,
+ bool& stopCategory) {
+ printString(objcCategory.nameVMAddr);
+ ma->forEachObjCMethod(objcCategory.instanceMethodsVMAddr, vmAddrConverter, sharedCacheRelativeSelectorBaseVMAddress, visitMethod);
+ ma->forEachObjCMethod(objcCategory.classMethodsVMAddr, vmAddrConverter, sharedCacheRelativeSelectorBaseVMAddress, visitMethod);
+ ma->forEachObjCMethod(objcCategory.instanceMethodsVMAddr, vmAddrConverter, sharedCacheRelativeSelectorBaseVMAddress, visitMethod);
+ ma->forEachObjCProperty(objcCategory.instancePropertiesVMAddr, vmAddrConverter, visitProperty);
+ };
+
+ auto visitProtocol = ^(uint64_t protoVMAddr,
+ const dyld3::MachOAnalyzer::ObjCProtocol& objcProto,
+ bool& stopProtocol) {
+ printString(objcProto.nameVMAddr);
+ ma->forEachObjCMethod(objcProto.instanceMethodsVMAddr, vmAddrConverter, sharedCacheRelativeSelectorBaseVMAddress, visitMethod);
+ ma->forEachObjCMethod(objcProto.classMethodsVMAddr, vmAddrConverter, sharedCacheRelativeSelectorBaseVMAddress, visitMethod);
+ ma->forEachObjCMethod(objcProto.optionalInstanceMethodsVMAddr, vmAddrConverter, sharedCacheRelativeSelectorBaseVMAddress, visitMethod);
+ ma->forEachObjCMethod(objcProto.optionalClassMethodsVMAddr, vmAddrConverter, sharedCacheRelativeSelectorBaseVMAddress, visitMethod);
+ };
+
+ ma->forEachObjCClass(diag, vmAddrConverter, visitClass);
+ ma->forEachObjCCategory(diag, vmAddrConverter, visitCategory);
+ ma->forEachObjCProtocol(diag, vmAddrConverter, visitProtocol);
+ }
+ });
+ }
+
+ if (printExports) {
+ dyldCache->forEachImage(^(const Header *hdr, const char *installName) {
+ const dyld3::MachOAnalyzer* ma = (dyld3::MachOAnalyzer*)hdr;
+ uint32_t exportTrieRuntimeOffset;
+ uint32_t exportTrieSize;
+ if ( ma->hasExportTrie(exportTrieRuntimeOffset, exportTrieSize) ) {
+ const uint8_t* start = (uint8_t*)hdr + exportTrieRuntimeOffset;
+ const uint8_t* end = start + exportTrieSize;
+ std::vector<ExportInfoTrie::Entry> exports;
+ if ( !ExportInfoTrie::parseTrie(start, end, exports) ) {
+ return;
+ }
+
+ for (const ExportInfoTrie::Entry& entry: exports) {
+ const char* flags = "";
+ if ( entry.info.flags & EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER )
+ flags = " (resolver)";
+ if ( entry.info.flags & EXPORT_SYMBOL_FLAGS_WEAK_DEFINITION )
+ flags = " (weak-def)";
+ printf("%s: %s%s\n", installName, entry.name.c_str(), flags);
+ }
+ }
+ });
+ }
+ }
+ else if ( options.mode == modeSectionSizes ) {
+ __block std::map<std::string, uint64_t> sectionSizes;
+ dyldCache->forEachImage(^(const Header *hdr, const char *installName) {
+ const dyld3::MachOAnalyzer* ma = (const dyld3::MachOAnalyzer*)hdr;
+ ((const Header*)ma)->forEachSection(^(const Header::SectionInfo §Info, bool &stop) {
+ std::string section = std::string(sectInfo.segmentName) + " " + std::string(sectInfo.sectionName);
+ sectionSizes[section] += sectInfo.size;
+ });
+ });
+ for (const auto& keyAndValue : sectionSizes) {
+ printf("%lld %s\n", keyAndValue.second, keyAndValue.first.c_str());
+ }
+ }
+ else if ( options.mode == modeObjCInfo ) {
+ if ( !dyldCache->hasOptimizedObjC() ) {
+ fprintf(stderr, "Error: could not get optimized objc\n");
+ return 1;
+ }
+
+ printf("version: %u\n", dyldCache->objcOptVersion());
+ printf("flags: 0x%08x\n", dyldCache->objcOptFlags());
+ if ( const objc::SelectorHashTable* selectors = dyldCache->objcSelectorHashTable() ) {
+ printf("num selectors: %u\n", selectors->occupancy());
+ printf("selectors base address: 0x%llx\n",
+ dyldCache->unslidLoadAddress() + ((uint64_t)selectors - (uint64_t)dyldCache));
+ }
+ if ( const objc::ClassHashTable* classes = dyldCache->objcClassHashTable() ) {
+ printf("num classes: %u\n", classes->occupancy());
+ printf("classes base address: 0x%llx\n",
+ dyldCache->unslidLoadAddress() + ((uint64_t)classes - (uint64_t)dyldCache));
+ }
+ if ( const objc::ProtocolHashTable* protocols = dyldCache->objcProtocolHashTable() ) {
+ printf("num protocols: %u\n", protocols->occupancy());
+ printf("protocols base address: 0x%llx\n",
+ dyldCache->unslidLoadAddress() + ((uint64_t)protocols - (uint64_t)dyldCache));
+ }
+ if ( const void* relativeMethodListSelectorBase = dyldCache->objcRelativeMethodListsBaseAddress() ) {
+ printf("method list selector base address: 0x%llx\n", dyldCache->unslidLoadAddress() + ((uint64_t)relativeMethodListSelectorBase - (uint64_t)dyldCache));
+ printf("method list selector base value: \"%s\"\n", (const char*)relativeMethodListSelectorBase);
+ }
+
+ // Dump the objc indices
+
+ __block std::map<uint64_t, const char*> dylibVMAddrMap;
+ dyldCache->forEachImage(^(const Header *hdr, const char *installName) {
+ if ( hdr->hasObjC() )
+ dylibVMAddrMap[hdr->preferredLoadAddress()] = installName;
+ });
+
+ std::vector<std::pair<std::string_view, const objc::objc_image_info*>> objcDylibs;
+
+ const objc::HeaderInfoRO* headerInfoRO = dyldCache->objcHeaderInfoRO();
+ const bool is64 = (strstr(dyldCache->archName(), "64") != nullptr) && (strstr(dyldCache->archName(), "64_32") == nullptr);
+ if ( is64 ) {
+ const auto* headerInfo64 = (objc::objc_headeropt_ro_t<uint64_t>*)headerInfoRO;
+ uint64_t headerInfoVMAddr = dyldCache->unslidLoadAddress();
+ headerInfoVMAddr += (uint64_t)headerInfo64 - (uint64_t)dyldCache;
+ for ( std::pair<uint64_t, const char*> vmAddrAndName : dylibVMAddrMap ) {
+ const objc::objc_header_info_ro_t<uint64_t>* element = headerInfo64->get(headerInfoVMAddr, vmAddrAndName.first);
+ if ( element != nullptr ) {
+ objcDylibs.resize(headerInfo64->index(element) + 1);
+ objcDylibs[headerInfo64->index(element)] = { vmAddrAndName.second, (const objc::objc_image_info*)element->imageInfo() };
+ }
+ }
+ } else {
+ const auto* headerInfo32 = (objc::objc_headeropt_ro_t<uint32_t>*)headerInfoRO;
+ uint64_t headerInfoVMAddr = dyldCache->unslidLoadAddress();
+ headerInfoVMAddr += (uint64_t)headerInfo32 - (uint64_t)dyldCache;
+ for ( std::pair<uint64_t, const char*> vmAddrAndName : dylibVMAddrMap ) {
+ const objc::objc_header_info_ro_t<uint32_t>* element = headerInfo32->get(headerInfoVMAddr, vmAddrAndName.first);
+ if ( element != nullptr ) {
+ objcDylibs.resize(headerInfo32->index(element) + 1);
+ objcDylibs[headerInfo32->index(element)] = { vmAddrAndName.second, (const objc::objc_image_info*)element->imageInfo() };
+ }
+ }
+ }
+
+ printf("num objc dylibs: %lu\n", objcDylibs.size());
+ for ( uint32_t i = 0; i != objcDylibs.size(); ++i ) {
+ const std::pair<std::string_view, const objc::objc_image_info*> objcDylib = objcDylibs[i];
+
+ // Try work out which flags we have
+ std::string flagsStr;
+ uint32_t flags = objcDylib.second->flags;
+ std::pair<uint32_t, const char*> flagComponents[] = {
+ { 1 << 0, "dyldCategories" },
+ { 1 << 1, "supportsGC" },
+ { 1 << 2, "requiresGC" },
+ { 1 << 3, "optimizedByDyld" },
+ { 1 << 4, "signedClassRO" },
+ { 1 << 5, "isSimulated" },
+ { 1 << 6, "hasCategoryClassProperties" },
+ { 1 << 7, "optimizedByDyldClosure" },
+ { 0xFF << 8, "swiftUnstableVersion" },
+ { 0xFFFF << 16, "swiftVersion" },
+ };
+ bool needsSeparator = false;
+ for ( auto [mask, name] : flagComponents ) {
+ if ( (flags & mask) != 0 ) {
+ if ( needsSeparator )
+ flagsStr += " | ";
+ needsSeparator = true;
+
+ flagsStr += name;
+ }
+ }
+ printf("dylib[%d]: { 0x%x, 0x%08x } (%s) %s\n",
+ i, objcDylib.second->version, objcDylib.second->flags,
+ flagsStr.c_str(), objcDylib.first.data());
+ }
+ }
+ else if ( options.mode == modeObjCProtocols ) {
+ if ( !dyldCache->hasOptimizedObjC() ) {
+ fprintf(stderr, "Error: could not get optimized objc\n");
+ return 1;
+ }
+ const objc::ProtocolHashTable* protocols = dyldCache->objcProtocolHashTable();
+ if ( protocols == nullptr ) {
+ fprintf(stderr, "Error: could not get optimized objc protocols\n");
+ return 1;
+ }
+
+ __block std::map<uint64_t, const char*> dylibVMAddrMap;
+ dyldCache->forEachImage(^(const Header *hdr, const char *installName) {
+ if ( hdr->hasObjC() )
+ dylibVMAddrMap[hdr->preferredLoadAddress()] = installName;
+ });
+
+ __block std::map<uint16_t, const char*> dylibMap;
+
+ const objc::HeaderInfoRO* headerInfoRO = dyldCache->objcHeaderInfoRO();
+ const bool is64 = (strstr(dyldCache->archName(), "64") != nullptr) && (strstr(dyldCache->archName(), "64_32") == nullptr);
+ if ( is64 ) {
+ const auto* headerInfo64 = (objc::objc_headeropt_ro_t<uint64_t>*)headerInfoRO;
+ uint64_t headerInfoVMAddr = dyldCache->unslidLoadAddress();
+ headerInfoVMAddr += (uint64_t)headerInfo64 - (uint64_t)dyldCache;
+ for ( std::pair<uint64_t, const char*> vmAddrAndName : dylibVMAddrMap ) {
+ const objc::objc_header_info_ro_t<uint64_t>* element = headerInfo64->get(headerInfoVMAddr, vmAddrAndName.first);
+ if ( element != nullptr ) {
+ dylibMap[headerInfo64->index(element)] = vmAddrAndName.second;
+ }
+ }
+ } else {
+ const auto* headerInfo32 = (objc::objc_headeropt_ro_t<uint32_t>*)headerInfoRO;
+ uint64_t headerInfoVMAddr = dyldCache->unslidLoadAddress();
+ headerInfoVMAddr += (uint64_t)headerInfo32 - (uint64_t)dyldCache;
+ for ( std::pair<uint64_t, const char*> vmAddrAndName : dylibVMAddrMap ) {
+ const objc::objc_header_info_ro_t<uint32_t>* element = headerInfo32->get(headerInfoVMAddr, vmAddrAndName.first);
+ if ( element != nullptr ) {
+ dylibMap[headerInfo32->index(element)] = vmAddrAndName.second;
+ }
+ }
+ }
+
+ typedef objc::ProtocolHashTable::ObjectAndDylibIndex ObjectAndDylibIndex;
+ protocols->forEachProtocol(^(uint32_t bucketIndex, const char* protocolName,
+ const dyld3::Array<ObjectAndDylibIndex>& implCacheInfos) {
+
+ if ( implCacheInfos.empty() ) {
+ // Empty bucket
+ printf("[% 5d]\n", bucketIndex);
+ return;
+ }
+
+ if ( implCacheInfos.count() == 1 ) {
+ // No duplicates
+ printf("[% 5d] -> (% 8lld, %4d) = %s (in %s)\n",
+ bucketIndex, implCacheInfos[0].first, implCacheInfos[0].second, protocolName,
+ dylibMap.at(implCacheInfos[0].second));
+ return;
+ }
+
+ // class appears in more than one header
+ fprintf(stderr, "[% 5d] -> %llu duplicates = %s\n", bucketIndex, implCacheInfos.count(), protocolName);
+ for (const ObjectAndDylibIndex& objectInfo : implCacheInfos) {
+ printf(" - [% 5d] -> (% 8lld, %4d) = %s in (%s)\n",
+ bucketIndex, objectInfo.first, objectInfo.second, protocolName,
+ dylibMap.at(objectInfo.second));
+ }
+ });
+ }
+ else if ( options.mode == modeObjCClassHashTable ) {
+ if ( !dyldCache->hasOptimizedObjC() ) {
+ fprintf(stderr, "Error: could not get optimized objc\n");
+ return 1;
+ }
+ const objc::ClassHashTable* classes = dyldCache->objcClassHashTable();
+ if ( classes == nullptr ) {
+ fprintf(stderr, "Error: could not get optimized objc classes\n");
+ return 1;
+ }
+
+ typedef objc::ClassHashTable::ObjectAndDylibIndex ObjectAndDylibIndex;
+ classes->forEachClass(^(uint32_t bucketIndex, const char* className,
+ const dyld3::Array<ObjectAndDylibIndex>& implCacheInfos) {
+ if ( implCacheInfos.empty() ) {
+ // Empty bucket
+ printf("[% 5d]\n", bucketIndex);
+ return;
+ }
+
+ if ( implCacheInfos.count() == 1 ) {
+ // No duplicates
+ printf("[% 5d] -> (% 8lld, %4d) = %s\n",
+ bucketIndex, implCacheInfos[0].first, implCacheInfos[0].second, className);
+ return;
+ }
+
+ // class appears in more than one header
+ printf("[% 5d] -> %llu duplicates = %s\n", bucketIndex, implCacheInfos.count(), className);
+ for (const ObjectAndDylibIndex& objectInfo : implCacheInfos) {
+ printf(" - [% 5d] -> (% 8lld, %4d) = %s\n",
+ bucketIndex, objectInfo.first, objectInfo.second, className);
+ }
+ });
+ }
+ else if ( options.mode == modeObjCClasses ) {
+
+ // If we are running on macOS against a cache for another device, then we need a root path to find on-disk dylibs/executables
+ if ( Platform(dyld_get_active_platform()) != dyldCache->platform() ) {
+ if ( options.rootPath == nullptr ) {
+ fprintf(stderr, "Analyzing cache file requires a root path for on-disk binaries. Rerun with -fs-root *path*\n");
+ return 1;
+ }
+ }
+
+ auto getString = ^const char *(const dyld3::MachOAnalyzer* ma, VMAddress nameVMAddr){
+ dyld3::MachOAnalyzer::PrintableStringResult result;
+ const char* name = ma->getPrintableString(nameVMAddr.rawValue(), result);
+ if (result == dyld3::MachOAnalyzer::PrintableStringResult::CanPrint)
+ return name;
+ return nullptr;
+ };
+
+ uint64_t sharedCacheRelativeSelectorBaseVMAddress = dyldCache->sharedCacheRelativeSelectorBaseVMAddress();
+
+ using json::Node;
+ using json::NodeValueType;
+
+ std::string instancePrefix("-");
+ std::string classPrefix("+");
+
+ // Build a map of class vm addrs to their names so that categories know the
+ // name of the class they are attaching to
+ __block std::unordered_map<uint64_t, const char*> classVMAddrToName;
+ __block std::unordered_map<uint64_t, const char*> metaclassVMAddrToName;
+ dyldCache->forEachImage(^(const Header *mh, const char *installName) {
+ const dyld3::MachOAnalyzer* ma = (const dyld3::MachOAnalyzer*)mh;
+
+ __block objc_visitor::Visitor visitor(dyldCache, ma, VMAddress(sharedCacheRelativeSelectorBaseVMAddress));
+
+ auto visitClass = ^(const objc_visitor::Class& objcClass, bool& stopClass) {
+ VMAddress classVMAddr = objcClass.getVMAddress();
+ VMAddress nameVMAddr = objcClass.getNameVMAddr(visitor);
+ if ( auto className = getString(ma, nameVMAddr) ) {
+ if ( objcClass.isMetaClass )
+ metaclassVMAddrToName[classVMAddr.rawValue()] = className;
+ else
+ classVMAddrToName[classVMAddr.rawValue()] = className;
+ }
+ };
+
+ visitor.forEachClassAndMetaClass(visitClass);
+ });
+
+ // These are used only for the on-disk binaries we analyze
+ __block std::vector<const char*> onDiskChainedFixupBindTargets;
+ __block std::unordered_map<uint64_t, const char*> onDiskClassVMAddrToName;
+ __block std::unordered_map<uint64_t, const char*> onDiskMetaclassVMAddrToName;
+
+ auto getProperties = ^(const dyld3::MachOAnalyzer* ma, const objc_visitor::PropertyList& propertyList,
+ objc_visitor::Visitor& visitor) {
+ Node propertiesNode;
+
+ for ( uint32_t i = 0, numProperties = propertyList.numProperties(); i != numProperties; ++i ) {
+ objc_visitor::Property property = propertyList.getProperty(visitor, i);
+
+ // Get the name && attributes
+ const char* propertyName = property.getName(visitor);
+ const char* propertyAttributes = property.getAttributes(visitor);
+
+ Node propertyNode;
+ propertyNode.map["name"] = Node{propertyName};
+ propertyNode.map["attributes"] = Node{propertyAttributes};
+ propertiesNode.array.push_back(propertyNode);
+ }
+
+ return propertiesNode.array.empty() ? std::optional<Node>() : propertiesNode;
+ };
+
+ auto getClassProtocols = ^(const dyld3::MachOAnalyzer* ma, const objc_visitor::ProtocolList& protocolList,
+ objc_visitor::Visitor& visitor) {
+ Node protocolsNode;
+
+ for ( uint64_t i = 0, numProtocols = protocolList.numProtocols(visitor); i != numProtocols; ++i ) {
+ objc_visitor::Protocol protocol = protocolList.getProtocol(visitor, i);
+
+ if ( const char *name = getString(ma, protocol.getNameVMAddr(visitor)) ) {
+ protocolsNode.array.push_back(Node{name});
+ }
+ }
+
+ return protocolsNode.array.empty() ? std::optional<Node>() : protocolsNode;
+ };
+
+ auto getProtocols = ^(const dyld3::MachOAnalyzer* ma,
+ objc_visitor::Visitor& visitor) {
+ auto getMethods = ^(const dyld3::MachOAnalyzer* mh, objc_visitor::MethodList methodList,
+ const std::string &prefix, Node &node){
+ for ( uint32_t i = 0, numMethods = methodList.numMethods(); i != numMethods; ++i ) {
+ objc_visitor::Method objcMethod = methodList.getMethod(visitor, i);
+
+ if ( auto name = getString(mh, objcMethod.getNameVMAddr(visitor)) ) {
+ node.array.push_back(Node{prefix + name});
+ }
+ }
+ };
+
+ __block Node protocolsNode;
+ auto visitProtocol = ^(const objc_visitor::Protocol& objcProtocol, bool& stopProtocol) {
+ const char* protoName = getString(ma, objcProtocol.getNameVMAddr(visitor));
+ if ( !protoName )
+ return;
+
+ Node entry;
+ entry.map["protocolName"] = Node{protoName};
+
+ objc_visitor::ProtocolList protocolList = objcProtocol.getProtocols(visitor);
+ if ( uint64_t numProtocols = protocolList.numProtocols(visitor); numProtocols != 0 ) {
+ Node visitedProtocols;
+
+ for ( uint32_t i = 0; i != numProtocols; ++i ) {
+ objc_visitor::Protocol innerProtocol = protocolList.getProtocol(visitor, i);
+
+ if ( const char* name = getString(ma, innerProtocol.getNameVMAddr(visitor)) )
+ visitedProtocols.array.push_back(Node{name});
+ }
+
+ if (!visitedProtocols.array.empty()) {
+ entry.map["protocols"] = visitedProtocols;
+ }
+ }
+
+ Node methods;
+ getMethods(ma, objcProtocol.getInstanceMethods(visitor), instancePrefix, methods);
+ getMethods(ma, objcProtocol.getClassMethods(visitor), classPrefix, methods);
+ if (!methods.array.empty()) {
+ entry.map["methods"] = methods;
+ }
+
+ Node optMethods;
+ getMethods(ma, objcProtocol.getOptionalInstanceMethods(visitor), instancePrefix, optMethods);
+ getMethods(ma, objcProtocol.getOptionalClassMethods(visitor), classPrefix, optMethods);
+ if (!optMethods.array.empty()) {
+ entry.map["optionalMethods"] = optMethods;
+ }
+
+ protocolsNode.array.push_back(entry);
+ };
+
+ visitor.forEachProtocol(visitProtocol);
+
+ return protocolsNode.array.empty() ? std::optional<Node>() : protocolsNode;
+ };
+
+ auto getSelRefs = ^(const dyld3::MachOAnalyzer* ma,
+ objc_visitor::Visitor& visitor) {
+ __block std::vector<const char *> selNames;
+
+ visitor.forEachSelectorReference(^(VMAddress selRefVMAddr, VMAddress selRefTargetVMAddr, const char *selectorString) {
+ if ( auto selValue = getString(ma, selRefTargetVMAddr) ) {
+ selNames.push_back(selValue);
+ }
+ });
+
+ std::sort(selNames.begin(), selNames.end(),
+ [](const char* a, const char* b) {
+ return strcasecmp(a, b) < 0;
+ });
+
+ Node selrefs;
+ for (auto s: selNames) {
+ selrefs.array.push_back(Node{s});
+ }
+
+ return selrefs.array.empty() ? std::optional<Node>() : selrefs;
+ };
+
+ auto getClasses = ^(const dyld3::MachOAnalyzer* ma,
+ objc_visitor::Visitor& visitor) {
+ const uint32_t pointerSize = ma->pointerSize();
+ const uint16_t chainedPointerFormat = ma->hasChainedFixups() ? ma->chainedPointerFormat() : 0;
+
+ // Get the vmAddrs for all exported symbols as we want to know if classes
+ // are exported
+ std::set<uint64_t> exportedSymbolVMAddrs;
+ {
+ uint64_t loadAddress = ((const Header*)ma)->preferredLoadAddress();
+
+ uint32_t exportTrieRuntimeOffset;
+ uint32_t exportTrieSize;
+ if ( ma->hasExportTrie(exportTrieRuntimeOffset, exportTrieSize) ) {
+ const uint8_t* start = (uint8_t*)ma + exportTrieRuntimeOffset;
+ const uint8_t* end = start + exportTrieSize;
+ std::vector<ExportInfoTrie::Entry> exports;
+ if ( ExportInfoTrie::parseTrie(start, end, exports) ) {
+ for (const ExportInfoTrie::Entry& entry: exports) {
+ exportedSymbolVMAddrs.insert(loadAddress + entry.info.address);
+ }
+ }
+ }
+ }
+
+ __block Node classesNode;
+ __block bool skippedPreviousClass = false;
+ auto visitClass = ^(const objc_visitor::Class& objcClass, bool& stopClass) {
+ if ( objcClass.isMetaClass ) {
+ if (skippedPreviousClass) {
+ // If the class was bad, then skip the meta class too
+ skippedPreviousClass = false;
+ return;
+ }
+ } else {
+ skippedPreviousClass = true;
+ }
+
+ std::string classType = "-";
+ if ( objcClass.isMetaClass )
+ classType = "+";
+
+ VMAddress classVMAddr = objcClass.getVMAddress();
+ VMAddress nameVMAddr = objcClass.getNameVMAddr(visitor);
+
+ dyld3::MachOAnalyzer::PrintableStringResult classNameResult;
+ const char* className = ma->getPrintableString(nameVMAddr.rawValue(), classNameResult);
+ if ( classNameResult != dyld3::MachOAnalyzer::PrintableStringResult::CanPrint ) {
+ return;
+ }
+
+ __block const char* superClassName = nullptr;
+ if ( DyldSharedCache::inDyldCache(dyldCache, ma) ) {
+ std::optional<VMAddress> superclassVMAddr = objcClass.getSuperclassVMAddr(visitor);
+ if ( superclassVMAddr.has_value() ) {
+ if ( objcClass.isMetaClass ) {
+ // If we are root class, then our superclass should actually point to our own class
+ if ( objcClass.isRootClass(visitor) ) {
+ auto it = classVMAddrToName.find(superclassVMAddr.value().rawValue());
+ assert(it != classVMAddrToName.end());
+ superClassName = it->second;
+ } else {
+ auto it = metaclassVMAddrToName.find(superclassVMAddr.value().rawValue());
+ assert(it != metaclassVMAddrToName.end());
+ superClassName = it->second;
+ }
+ } else {
+ auto it = classVMAddrToName.find(superclassVMAddr.value().rawValue());
+ assert(it != classVMAddrToName.end());
+ superClassName = it->second;
+ }
+ }
+ } else {
+ // On-disk binary. Lets crack the chain to work out what we are pointing at
+ objcClass.withSuperclass(visitor, ^(const dyld3::MachOFile::ChainedFixupPointerOnDisk* fixup, uint16_t) {
+ if ( (pointerSize == 8) && (fixup->raw64 == 0) )
+ return;
+ else if ( (pointerSize == 4) && (fixup->raw32 == 0) )
+ return;
+
+ uint32_t bindOrdinal;
+ int64_t embeddedAddend;
+ if ( fixup->isBind(chainedPointerFormat, bindOrdinal, embeddedAddend) ) {
+ // Bind to another image. Use the bind table to work out which name to bind to
+ const char* symbolName = onDiskChainedFixupBindTargets[(size_t)bindOrdinal];
+ if ( objcClass.isMetaClass ) {
+ if ( strstr(symbolName, "_OBJC_METACLASS_$_") == symbolName ) {
+ superClassName = symbolName + strlen("_OBJC_METACLASS_$_");
+ } else {
+ // Swift classes don't start with these prefixes so just skip them
+ if ( objcClass.isSwiftLegacy(visitor) || objcClass.isSwiftStable(visitor) )
+ return;
+ }
+ } else {
+ if ( strstr(symbolName, "_OBJC_CLASS_$_") == symbolName ) {
+ superClassName = symbolName + strlen("_OBJC_CLASS_$_");
+ } else {
+ // Swift classes don't start with these prefixes so just skip them
+ if ( objcClass.isSwiftLegacy(visitor) || objcClass.isSwiftStable(visitor) )
+ return;
+ }
+ }
+ } else {
+ // Rebase within this image.
+ std::optional<VMAddress> superclassVMAddr = objcClass.getSuperclassVMAddr(visitor);
+ if ( objcClass.isMetaClass ) {
+ auto it = onDiskMetaclassVMAddrToName.find(superclassVMAddr.value().rawValue());
+ assert(it != onDiskMetaclassVMAddrToName.end());
+ superClassName = it->second;
+ } else {
+ auto it = onDiskClassVMAddrToName.find(superclassVMAddr.value().rawValue());
+ assert(it != onDiskClassVMAddrToName.end());
+ superClassName = it->second;
+ }
+ }
+ });
+
+ if ( !superClassName ) {
+ // Probably a swift class we want to skip
+ return;
+ }
+ }
+
+ // Print the methods on this class
+ Node methodsNode;
+
+ objc_visitor::MethodList objcMethodList = skipListsOfLists(objcClass.getBaseMethods(visitor), visitor);
+
+ for ( uint32_t i = 0, numMethods = objcMethodList.numMethods(); i != numMethods; ++i ) {
+ objc_visitor::Method objcMethod = objcMethodList.getMethod(visitor, i);
+
+ dyld3::MachOAnalyzer::PrintableStringResult methodNameResult;
+ const char* methodName = ma->getPrintableString(objcMethod.getNameVMAddr(visitor).rawValue(),
+ methodNameResult);
+ if (methodNameResult != dyld3::MachOAnalyzer::PrintableStringResult::CanPrint)
+ continue;
+
+ methodsNode.array.push_back(Node{classType + methodName});
+ }
+
+ objc_visitor::PropertyList propertyList = skipListsOfLists(objcClass.getBaseProperties(visitor), visitor);
+ std::optional<Node> properties = getProperties(ma, propertyList, visitor);
+
+ if ( objcClass.isMetaClass ) {
+ assert(!classesNode.array.empty());
+ Node& currentClassNode = classesNode.array.back();
+ assert(currentClassNode.map["className"].value == className);
+ if (!methodsNode.array.empty()) {
+ Node& currentMethodsNode = currentClassNode.map["methods"];
+ currentMethodsNode.array.insert(currentMethodsNode.array.end(),
+ methodsNode.array.begin(),
+ methodsNode.array.end());
+ }
+ if (properties.has_value()) {
+ Node& currentPropertiesNode = currentClassNode.map["properties"];
+ currentPropertiesNode.array.insert(currentPropertiesNode.array.end(),
+ properties->array.begin(),
+ properties->array.end());
+ }
+ return;
+ }
+
+ objc_visitor::ProtocolList protocolList = skipListsOfLists(objcClass.getBaseProtocols(visitor), visitor);
+
+ Node currentClassNode;
+ currentClassNode.map["className"] = Node{className};
+ if ( superClassName != nullptr )
+ currentClassNode.map["superClassName"] = Node{superClassName};
+ if (!methodsNode.array.empty())
+ currentClassNode.map["methods"] = methodsNode;
+ if (properties.has_value())
+ currentClassNode.map["properties"] = properties.value();
+ if (std::optional<Node> protocols = getClassProtocols(ma, protocolList, visitor))
+ currentClassNode.map["protocols"] = protocols.value();
+
+ currentClassNode.map["exported"] = Node{exportedSymbolVMAddrs.count(classVMAddr.rawValue()) != 0};
+
+ // We didn't skip this class so mark it as such
+ skippedPreviousClass = false;
+
+ classesNode.array.push_back(currentClassNode);
+ };
+
+ visitor.forEachClassAndMetaClass(visitClass);
+
+ return classesNode.array.empty() ? std::optional<Node>() : classesNode;
+ };
+
+ auto getCategories = ^(const dyld3::MachOAnalyzer* ma,
+ objc_visitor::Visitor& visitor) {
+ const uint32_t pointerSize = ma->pointerSize();
+ const uint16_t chainedPointerFormat = ma->hasChainedFixups() ? ma->chainedPointerFormat() : 0;
+
+ __block Node categoriesNode;
+ auto visitCategory = ^(const objc_visitor::Category& objcCategory, bool& stopCategory) {
+ VMAddress nameVMAddr = objcCategory.getNameVMAddr(visitor);
+
+ dyld3::MachOAnalyzer::PrintableStringResult categoryNameResult;
+ const char* categoryName = ma->getPrintableString(nameVMAddr.rawValue(), categoryNameResult);
+ if (categoryNameResult != dyld3::MachOAnalyzer::PrintableStringResult::CanPrint)
+ return;
+
+ __block const char* className = nullptr;
+ if ( DyldSharedCache::inDyldCache(dyldCache, ma) ) {
+ // The class might be missing if the target is not in the shared cache. So just skip these ones
+ std::optional<VMAddress> clsVMAddr = objcCategory.getClassVMAddr(visitor);
+ if ( !clsVMAddr.has_value() )
+ return;
+
+ if ( objcCategory.isForSwiftStubClass() ) {
+ // We don't have a class for stub classes, so just use a marker
+ className = "unknown swift stub class";
+ } else {
+ auto it = classVMAddrToName.find(clsVMAddr.value().rawValue());
+ if (it == classVMAddrToName.end()) {
+ // This is an odd binary with perhaps a Swift class. Just skip this entry
+ // Specifically, categories can be attached to "stub classes" which are not in the
+ // objc class list. Instead the ISA (really the ISA + 8" of the class the category is
+ // attached to, is listed in a section called __objc_stublist. Those are Swift stub classes
+ return;
+ }
+ className = it->second;
+ }
+ } else {
+ // On-disk binary. Lets crack the chain to work out what we are pointing at
+ objcCategory.withClass(visitor,
+ ^(const dyld3::MachOFile::ChainedFixupPointerOnDisk* fixup, uint16_t) {
+ if ( (pointerSize == 8) && (fixup->raw64 == 0) )
+ return;
+ else if ( (pointerSize == 4) && (fixup->raw32 == 0) )
+ return;
+
+ uint32_t bindOrdinal;
+ int64_t embeddedAddend;
+ if ( fixup->isBind(chainedPointerFormat, bindOrdinal, embeddedAddend) ) {
+ // Bind to another image. Use the bind table to work out which name to bind to
+ const char* symbolName = onDiskChainedFixupBindTargets[(size_t)bindOrdinal];
+ if ( strstr(symbolName, "_OBJC_CLASS_$_") == symbolName ) {
+ className = symbolName + strlen("_OBJC_CLASS_$_");
+ } else {
+ // Swift classes don't start with these prefixes so just skip them
+ // We don't know that this is a Swift class/category though, but skip it anyway
+ return;
+ }
+ } else {
+ std::optional<VMAddress> clsVMAddr = objcCategory.getClassVMAddr(visitor);
+ auto it = onDiskClassVMAddrToName.find(clsVMAddr.value().rawValue());
+ if (it == onDiskClassVMAddrToName.end()) {
+ // This is an odd binary with perhaps a Swift class. Just skip this entry
+ return;
+ }
+ className = it->second;
+ }
+ });
+
+ if ( !className ) {
+ // Probably a swift class we want to skip
+ return;
+ }
+ }
+
+ // Print the instance methods on this category
+ __block Node methodsNode;
+ {
+ objc_visitor::MethodList objcMethodList = objcCategory.getInstanceMethods(visitor);
+ for ( uint32_t i = 0, numMethods = objcMethodList.numMethods(); i != numMethods; ++i ) {
+ objc_visitor::Method objcMethod = objcMethodList.getMethod(visitor, i);
+
+ if ( auto methodName = getString(ma, objcMethod.getNameVMAddr(visitor)) )
+ methodsNode.array.push_back(Node{instancePrefix + methodName});
+ }
+ }
+
+ // Print the class methods on this category
+ {
+ objc_visitor::MethodList objcMethodList = objcCategory.getClassMethods(visitor);
+ for ( uint32_t i = 0, numMethods = objcMethodList.numMethods(); i != numMethods; ++i ) {
+ objc_visitor::Method objcMethod = objcMethodList.getMethod(visitor, i);
+
+ if ( auto methodName = getString(ma, objcMethod.getNameVMAddr(visitor)) )
+ methodsNode.array.push_back(Node{classPrefix + methodName});
+ }
+ }
+
+ Node currentCategoryNode;
+ currentCategoryNode.map["categoryName"] = Node{categoryName};
+ currentCategoryNode.map["className"] = Node{className};
+ if (!methodsNode.array.empty())
+ currentCategoryNode.map["methods"] = methodsNode;
+ if (std::optional<Node> properties = getProperties(ma, objcCategory.getInstanceProperties(visitor), visitor))
+ currentCategoryNode.map["properties"] = properties.value();
+ if (std::optional<Node> protocols = getClassProtocols(ma, objcCategory.getProtocols(visitor), visitor))
+ currentCategoryNode.map["protocols"] = protocols.value();
+
+ categoriesNode.array.push_back(currentCategoryNode);
+ };
+
+ visitor.forEachCategory(visitCategory);
+ return categoriesNode.array.empty() ? std::optional<Node>() : categoriesNode;
+ };
+
+ __block bool needsComma = false;
+
+ json::streamArrayBegin(needsComma);
+
+ dyldCache->forEachImage(^(const Header *mh, const char *installName) {
+ const dyld3::MachOAnalyzer* ma = (const dyld3::MachOAnalyzer*)mh;
+
+ objc_visitor::Visitor visitor(dyldCache, ma, VMAddress(sharedCacheRelativeSelectorBaseVMAddress));
+
+ Node imageRecord;
+ imageRecord.map["imagePath"] = Node{installName};
+ imageRecord.map["imageType"] = Node{"cache-dylib"};
+ std::optional<Node> classes = getClasses(ma, visitor);
+ std::optional<Node> categories = getCategories(ma, visitor);
+ std::optional<Node> protocols = getProtocols(ma, visitor);
+ std::optional<Node> selrefs = getSelRefs(ma, visitor);
+
+ // Skip emitting images with no objc data
+ if (!classes.has_value() && !categories.has_value() && !protocols.has_value() && !selrefs.has_value())
+ return;
+ if (classes.has_value())
+ imageRecord.map["classes"] = classes.value();
+ if (categories.has_value())
+ imageRecord.map["categories"] = categories.value();
+ if (protocols.has_value())
+ imageRecord.map["protocols"] = protocols.value();
+ if (selrefs.has_value())
+ imageRecord.map["selrefs"] = selrefs.value();
+
+ json::streamArrayNode(needsComma, imageRecord);
+ });
+
+ const dyld3::MachOAnalyzer* mainMA = nullptr;
+ if ( dyldCache ) {
+ // gracefully handling older dyld caches
+ if ( dyldCache->header.mappingOffset < 0x170 ) {
+ fprintf(stderr, "dyld_closure_util: can't operate against an old (pre-dyld4) dyld cache\n");
+ exit(1);
+ }
+
+ // HACK: use libSystem.dylib from cache as main executable to bootstrap state
+ uint32_t imageIndex;
+ if ( dyldCache->hasImagePath("/usr/lib/libSystem.B.dylib", imageIndex) ) {
+ uint64_t ignore1;
+ uint64_t ignore2;
+ mainMA = (MachOAnalyzer*)dyldCache->getIndexedImageEntry(imageIndex, ignore1, ignore2);
+ }
+ }
+
+ KernelArgs kernArgs(mainMA, {"test.exe"}, {}, {});
+ Allocator& alloc = MemoryManager::memoryManager().defaultAllocator();
+ SyscallDelegate osDelegate;
+ osDelegate._dyldCache = dyldCache;
+ osDelegate._rootPath = options.rootPath;
+ __block ProcessConfig config(&kernArgs, osDelegate, alloc);
+ RuntimeLocks locks;
+ RuntimeState stateObject(config, locks, alloc);
+ RuntimeState& state = stateObject;
+
+ config.dyldCache.addr->forEachLaunchLoaderSet(^(const char* executableRuntimePath, const PrebuiltLoaderSet* pbls) {
+
+ __block Diagnostics diag;
+ bool checkIfOSBinary = state.config.process.archs->checksOSBinary();
+ state.config.syscall.withReadOnlyMappedFile(diag, executableRuntimePath, checkIfOSBinary, ^(const void* mapping, size_t mappedSize, bool isOSBinary, const FileID& fileID, const char* canonicalPath, const int fileDescriptor) {
+ uint64_t sliceOffset;
+ uint64_t sliceSize;
+ if ( const dyld3::MachOFile* mf = dyld3::MachOFile::compatibleSlice(diag, sliceOffset, sliceSize, mapping, mappedSize, executableRuntimePath, state.config.process.platform, isOSBinary, *state.config.process.archs) ) {
+ dyld3::closure::FileSystemPhysical fileSystem;
+ dyld3::closure::LoadedFileInfo fileInfo = {
+ .fileContent = (void*)mf,
+ .fileContentLen = sliceSize,
+ .sliceOffset = 0,
+ .sliceLen = sliceSize,
+ .isOSBinary = false,
+ .inode = 0,
+ .mtime = 0,
+ .unload = nullptr,
+ .path = executableRuntimePath
+ };
+ const dyld3::MachOAnalyzer* ma = ((const dyld3::MachOAnalyzer*)mf)->remapIfZeroFill(diag, fileSystem, fileInfo);
+
+ // Populate the bind targets for classes from other images
+ onDiskChainedFixupBindTargets.clear();
+ ma->forEachChainedFixupTarget(diag, ^(int libOrdinal, const char* symbolName, uint64_t addend, bool weakImport, bool& stop) {
+ onDiskChainedFixupBindTargets.push_back(symbolName);
+ });
+ if ( diag.hasError() )
+ return;
+
+ // Populate the rebase targets for class names
+ onDiskMetaclassVMAddrToName.clear();
+ onDiskClassVMAddrToName.clear();
+
+ __block objc_visitor::Visitor visitor(dyldCache, ma, std::nullopt);
+
+ auto visitClass = ^(const objc_visitor::Class& objcClass, bool& stopClass) {
+ VMAddress classVMAddr = objcClass.getVMAddress();
+ VMAddress nameVMAddr = objcClass.getNameVMAddr(visitor);
+ if ( auto className = getString(ma, nameVMAddr) ) {
+ if ( objcClass.isMetaClass )
+ onDiskMetaclassVMAddrToName[classVMAddr.rawValue()] = className;
+ else
+ onDiskClassVMAddrToName[classVMAddr.rawValue()] = className;
+ }
+ };
+
+ visitor.forEachClassAndMetaClass(visitClass);
+
+ Node imageRecord;
+ imageRecord.map["imagePath"] = Node{executableRuntimePath};
+ imageRecord.map["imageType"] = Node{"executable"};
+ std::optional<Node> classes = getClasses(ma, visitor);
+ std::optional<Node> categories = getCategories(ma, visitor);
+ // TODO: protocols
+ std::optional<Node> selrefs = getSelRefs(ma, visitor);
+
+ // Skip emitting images with no objc data
+ if (!classes.has_value() && !categories.has_value() && !selrefs.has_value())
+ return;
+ if (classes.has_value())
+ imageRecord.map["classes"] = classes.value();
+ if (categories.has_value())
+ imageRecord.map["categories"] = categories.value();
+ if (selrefs.has_value())
+ imageRecord.map["selrefs"] = selrefs.value();
+
+ json::streamArrayNode(needsComma, imageRecord);
+ }
+ });
+ });
+
+ json::streamArrayEnd(needsComma);
+ }
+ else if ( options.mode == modeObjCClassLayout ) {
+ dumpObjCClassLayout(dyldCache);
+ }
+ else if ( options.mode == modeObjCClassMethodLists ) {
+ dumpObjCClassMethodLists(dyldCache);
+ }
+ else if ( options.mode == modeObjCSelectors ) {
+ if ( !dyldCache->hasOptimizedObjC() ) {
+ fprintf(stderr, "Error: could not get optimized objc\n");
+ return 1;
+ }
+ const objc::SelectorHashTable* selectors = dyldCache->objcSelectorHashTable();
+ if ( selectors == nullptr ) {
+ fprintf(stderr, "Error: could not get optimized objc selectors\n");
+ return 1;
+ }
+
+ __block std::vector<const char*> selNames;
+ selectors->forEachString(^(const char *str) {
+ selNames.push_back(str);
+ });
+
+ std::sort(selNames.begin(), selNames.end(),
+ [](const char* a, const char* b) {
+ // Sort by offset, not string value
+ return a < b;
+ });
+
+ json::Node root;
+ for (const char* selName : selNames) {
+ json::Node selNode;
+ selNode.map["selectorName"] = json::Node{selName};
+ selNode.map["offset"] = json::Node{(int64_t)selName - (int64_t)dyldCache};
+
+ root.array.push_back(selNode);
+ }
+
+ json::printJSON(root, 0, std::cout);
+ }
+ else if ( options.mode == modeSwiftProtocolConformances ) {
+#if 0
+ // This would dump the conformances in each binary, not the table in the shared cache
+ dyldCache->forEachImage(^(const Header *mh, const char *installName) {
+ const dyld3::MachOAnalyzer* ma = (const dyld3::MachOAnalyzer*)mh;
+
+ Diagnostics diag;
+ bool contentRebased = (sharedCachePath == nullptr);
+ auto vmAddrConverter = dyldCache->makeVMAddrConverter(contentRebased);
+ uint64_t binaryCacheOffset = (uint64_t)ma - (uint64_t)dyldCache;
+ ma->forEachSwiftProtocolConformance(diag, vmAddrConverter,
+ ^(uint64_t protocolConformanceRuntimeOffset, const dyld3::MachOAnalyzer::SwiftProtocolConformance &protocolConformance, bool &stopProtocolConformance) {
+ printf("(0x%08llx, 0x%08llx) -> 0x%08llx %s\n",
+ binaryCacheOffset + protocolConformance.typeConformanceRuntimeOffset, binaryCacheOffset + protocolConformance.protocolRuntimeOffset,
+ binaryCacheOffset + protocolConformanceRuntimeOffset, installName);
+ });
+ });
+#endif
+
+ auto getLibraryLeafName = [](const char* path)
+ {
+ const char* start = strrchr(path, '/');
+ if ( start != NULL )
+ return &start[1];
+ else
+ return path;
+ };
+
+ // Find all the symbols. This maps from VM Addresses to symbol name
+ __block std::unordered_map<uint64_t, std::string_view> symbols;
+ __block std::unordered_map<uint64_t, std::string_view> dylibs;
+ dyldCache->forEachImage(^(const Header *mh, const char *installName) {
+ const dyld3::MachOAnalyzer* ma = (const dyld3::MachOAnalyzer*)mh;
+ Diagnostics diag;
+ ma->forEachGlobalSymbol(diag, ^(const char *symbolName, uint64_t n_value, uint8_t n_type, uint8_t n_sect, uint16_t n_desc, bool &stop) {
+ symbols[n_value] = symbolName;
+ dylibs[n_value] = getLibraryLeafName(installName);
+ });
+ ma->forEachLocalSymbol(diag, ^(const char *symbolName, uint64_t n_value, uint8_t n_type, uint8_t n_sect, uint16_t n_desc, bool &stop) {
+ symbols[n_value] = symbolName;
+ dylibs[n_value] = getLibraryLeafName(installName);
+ });
+ });
+
+#if 0
+ // FIXME: Move to the new code for unmapped locals
+ if ( (sharedCachePath != nullptr) && dyldCache->hasLocalSymbolsInfo() ) {
+ // When mapping the cache from disk, we can also get the unmapped locals
+ struct stat statbuf;
+ if ( ::stat(sharedCachePath, &statbuf) ) {
+ fprintf(stderr, "Error: stat failed for dyld shared cache at %s\n", sharedCachePath);
+ return 1;
+ }
+
+ int cache_fd = ::open(sharedCachePath, O_RDONLY);
+ if (cache_fd < 0) {
+ fprintf(stderr, "Error: failed to open shared cache file at %s\n", sharedCachePath);
+ return 1;
+ }
+
+ const void* mappedData = ::mmap(NULL, statbuf.st_size, PROT_READ, MAP_PRIVATE, cache_fd, 0);
+ if ( mappedData == MAP_FAILED ) {
+ fprintf(stderr, "Error: Shared cache not mmap()able\b");
+ ::close(cache_fd);
+ return 1;
+ }
+ ::close(cache_fd);
+
+ const DyldSharedCache* localsCache = (const DyldSharedCache*)mappedData;
+
+ const bool is64 = (strstr(localsCache->archName(), "64") != NULL);
+ const uint32_t nlistFileOffset = (uint32_t)((uint8_t*)localsCache->getLocalNlistEntries() - (uint8_t*)dyldCache);
+ const char* localStrings = localsCache->getLocalStrings();
+
+ __block uint32_t entriesCount = 0;
+ localsCache->forEachLocalSymbolEntry(^(uint32_t dylibOffset, uint32_t nlistStartIndex, uint32_t nlistCount, bool &stop) {
+ const char* imageName = dyldCache->getIndexedImagePath(entriesCount);
+ //printf(" nlistStartIndex=%5d, nlistCount=%5d, image=%s\n", nlistStartIndex, nlistCount, imageName);
+ if ( is64 ) {
+ const nlist_64* symTab = (nlist_64*)((char*)dyldCache + nlistFileOffset);
+ for (int e = 0; e < nlistCount; ++e) {
+ const nlist_64* entry = &symTab[nlistStartIndex + e];
+ //printf(" nlist[%d].str=%d, %s\n", e, entry->n_un.n_strx, &localStrings[entry->n_un.n_strx]);
+ //printf(" nlist[%d].value=0x%0llX\n", e, entry->n_value);
+ symbols[entry->n_value] = &localStrings[entry->n_un.n_strx];
+ dylibs[entry->n_value] = getLibraryLeafName(imageName);
+ }
+ }
+ entriesCount++;
+ });
+ }
+#endif
+
+ auto getDylibForAddress = ^(uint64_t vmAddress) {
+ __block std::string_view dylibName;
+ dyldCache->forEachImage(^(const Header *mh, const char *installName) {
+ if ( !dylibName.empty() )
+ return;
+ ((const Header*)mh)->forEachSegment(^(const Header::SegmentInfo &info, bool &stop) {
+ if ( (vmAddress >= info.vmaddr) && (vmAddress < (info.vmaddr + info.vmsize)) ) {
+ dylibName = installName;
+ stop = true;
+ }
+ });
+ });
+ return dylibName;
+ };
+
+ uint64_t cacheBaseAddress = dyldCache->unslidLoadAddress();
+
+ const SwiftOptimizationHeader* swiftOptHeader = dyldCache->swiftOpt();
+ if ( swiftOptHeader == nullptr ) {
+ printf("No Swift optimization information present\n");
+ return 0;
+ }
+ printf("Swift optimization version: %d\n", swiftOptHeader->version);
+ if ( swiftOptHeader->version == 1 || swiftOptHeader->version == 2 || swiftOptHeader->version == 3 ) {
+ printf("Type hash table\n");
+ const SwiftHashTable* typeHashTable = (const SwiftHashTable*)((uint8_t*)dyldCache + swiftOptHeader->typeConformanceHashTableCacheOffset);
+ typeHashTable->forEachValue(^(uint32_t bucketIndex, const dyld3::Array<SwiftTypeProtocolConformanceLocation>& impls) {
+ for (const SwiftTypeProtocolConformanceLocation& protoLoc : impls) {
+ std::string_view typeDesc = "n/a";
+ std::string_view typeDescDylib;
+ if ( auto it = symbols.find(protoLoc.typeDescriptorCacheOffset + cacheBaseAddress); it != symbols.end() ) {
+ typeDesc = it->second;
+ typeDescDylib = dylibs[protoLoc.typeDescriptorCacheOffset + cacheBaseAddress];
+ } else {
+ typeDescDylib = getDylibForAddress(protoLoc.typeDescriptorCacheOffset + cacheBaseAddress);
+ if ( typeDescDylib.empty() )
+ typeDescDylib = "n/a";
+ else
+ typeDescDylib = getLibraryLeafName(typeDescDylib.data());
+ }
+
+ std::string_view protocol = "n/a";
+ std::string_view protocolDylib;
+ if ( auto it = symbols.find(protoLoc.protocolCacheOffset + cacheBaseAddress); it != symbols.end() ) {
+ protocol = it->second;
+ protocolDylib = dylibs[protoLoc.protocolCacheOffset + cacheBaseAddress];
+ } else {
+ protocolDylib = getDylibForAddress(protoLoc.protocolCacheOffset + cacheBaseAddress);
+ if ( protocolDylib.empty() )
+ protocolDylib = "n/a";
+ else
+ protocolDylib = getLibraryLeafName(protocolDylib.data());
+ }
+
+ std::string_view conformance = "n/a";
+ std::string_view conformanceDylib;
+ if ( auto it = symbols.find(protoLoc.protocolConformanceCacheOffset + cacheBaseAddress); it != symbols.end() ) {
+ conformance = it->second;
+ conformanceDylib = dylibs[protoLoc.protocolConformanceCacheOffset + cacheBaseAddress];
+ } else {
+ conformanceDylib = getDylibForAddress(protoLoc.protocolConformanceCacheOffset + cacheBaseAddress);
+ if ( conformanceDylib.empty() )
+ conformanceDylib = "n/a";
+ else
+ conformanceDylib = getLibraryLeafName(conformanceDylib.data());
+ }
+
+ printf("[%d]: (type: %s (cache offset 0x%llx) in %s, protocol %s (cache offset 0x%llx) in %s) -> (conformance: %s (cache offset 0x%llx) in %s)\n",
+ bucketIndex,
+ typeDesc.data(), protoLoc.typeDescriptorCacheOffset, typeDescDylib.data(),
+ protocol.data(), protoLoc.protocolCacheOffset, protocolDylib.data(),
+ conformance.data(), protoLoc.protocolConformanceCacheOffset, conformanceDylib.data());
+ }
+ });
+
+ printf("Metadata hash table\n");
+ const SwiftHashTable* metadataHashTable = (const SwiftHashTable*)((uint8_t*)dyldCache + swiftOptHeader->metadataConformanceHashTableCacheOffset);
+ metadataHashTable->forEachValue(^(uint32_t bucketIndex, const dyld3::Array<SwiftMetadataProtocolConformanceLocation>& impls) {
+ for (const SwiftMetadataProtocolConformanceLocation& protoLoc : impls) {
+ std::string_view metadataDesc = "n/a";
+ std::string_view metadataDescDylib;
+ if ( auto it = symbols.find(protoLoc.metadataCacheOffset + cacheBaseAddress); it != symbols.end() ) {
+ metadataDesc = it->second;
+ metadataDescDylib = dylibs[protoLoc.metadataCacheOffset + cacheBaseAddress];
+ } else {
+ metadataDescDylib = getDylibForAddress(protoLoc.metadataCacheOffset + cacheBaseAddress);
+ if ( metadataDescDylib.empty() )
+ metadataDescDylib = "n/a";
+ else
+ metadataDescDylib = getLibraryLeafName(metadataDescDylib.data());
+ }
+
+ std::string_view protocol = "n/a";
+ std::string_view protocolDylib;
+ if ( auto it = symbols.find(protoLoc.protocolCacheOffset + cacheBaseAddress); it != symbols.end() ) {
+ protocol = it->second;
+ protocolDylib = dylibs[protoLoc.protocolCacheOffset + cacheBaseAddress];
+ } else {
+ protocolDylib = getDylibForAddress(protoLoc.protocolCacheOffset + cacheBaseAddress);
+ if ( protocolDylib.empty() )
+ protocolDylib = "n/a";
+ else
+ protocolDylib = getLibraryLeafName(protocolDylib.data());
+ }
+
+ std::string_view conformance = "n/a";
+ std::string_view conformanceDylib;
+ if ( auto it = symbols.find(protoLoc.protocolConformanceCacheOffset + cacheBaseAddress); it != symbols.end() ) {
+ conformance = it->second;
+ conformanceDylib = dylibs[protoLoc.protocolConformanceCacheOffset + cacheBaseAddress];
+ } else {
+ conformanceDylib = getDylibForAddress(protoLoc.protocolConformanceCacheOffset + cacheBaseAddress);
+ if ( conformanceDylib.empty() )
+ conformanceDylib = "n/a";
+ else
+ conformanceDylib = getLibraryLeafName(conformanceDylib.data());
+ }
+
+ printf("[%d]: (metadata: %s (cache offset 0x%llx) in %s, protocol %s (cache offset 0x%llx) in %s) -> (conformance: %s (cache offset 0x%llx) in %s)\n",
+ bucketIndex,
+ metadataDesc.data(), protoLoc.metadataCacheOffset, metadataDescDylib.data(),
+ protocol.data(), protoLoc.protocolCacheOffset, protocolDylib.data(),
+ conformance.data(), protoLoc.protocolConformanceCacheOffset, conformanceDylib.data());
+ }
+ });
+
+ printf("Foreign type hash table\n");
+ const SwiftHashTable* foreignTypeHashTable = (const SwiftHashTable*)((uint8_t*)dyldCache + swiftOptHeader->foreignTypeConformanceHashTableCacheOffset);
+ foreignTypeHashTable->forEachValue(^(uint32_t bucketIndex, const dyld3::Array<SwiftForeignTypeProtocolConformanceLocation>& impls) {
+ for (const SwiftForeignTypeProtocolConformanceLocation& protoLoc : impls) {
+ std::string_view typeNameView((const char*)dyldCache + protoLoc.foreignDescriptorNameCacheOffset, protoLoc.foreignDescriptorNameLength);
+ std::string typeName;
+ if ( typeNameView.size() != strlen(typeNameView.data()) ) {
+ typeName.reserve(typeNameView.size());
+ for (const char c : typeNameView) {
+ if ( c == '\0' )
+ typeName += "\\0";
+ else
+ typeName += c;
+ }
+ typeNameView = typeName;
+ }
+;
+ std::string_view protocol = "n/a";
+ std::string_view protocolDylib;
+ if ( auto it = symbols.find(protoLoc.protocolCacheOffset + cacheBaseAddress); it != symbols.end() ) {
+ protocol = it->second;
+ protocolDylib = dylibs[protoLoc.protocolCacheOffset + cacheBaseAddress];
+ } else {
+ protocolDylib = getDylibForAddress(protoLoc.protocolCacheOffset + cacheBaseAddress);
+ if ( protocolDylib.empty() )
+ protocolDylib = "n/a";
+ else
+ protocolDylib = getLibraryLeafName(protocolDylib.data());
+ }
+
+ std::string_view conformance = "n/a";
+ std::string_view conformanceDylib;
+ if ( auto it = symbols.find(protoLoc.protocolConformanceCacheOffset + cacheBaseAddress); it != symbols.end() ) {
+ conformance = it->second;
+ conformanceDylib = dylibs[protoLoc.protocolConformanceCacheOffset + cacheBaseAddress];
+ } else {
+ conformanceDylib = getDylibForAddress(protoLoc.protocolConformanceCacheOffset + cacheBaseAddress);
+ if ( conformanceDylib.empty() )
+ conformanceDylib = "n/a";
+ else
+ conformanceDylib = getLibraryLeafName(conformanceDylib.data());
+ }
+
+ printf("[%d]: (type name: %s (cache offset 0x%llx), protocol %s (cache offset 0x%llx) in %s) -> (conformance: %s (cache offset 0x%llx) in %s)\n",
+ bucketIndex,
+ typeName.data(), protoLoc.foreignDescriptorNameCacheOffset,
+ protocol.data(), protoLoc.protocolCacheOffset, protocolDylib.data(),
+ conformance.data(), protoLoc.protocolConformanceCacheOffset, conformanceDylib.data());
+ }
+ });
+
+ if ( swiftOptHeader->version >= 2 )
+ printf("Swift prespecialization data offset: 0x%llx\n", swiftOptHeader->prespecializationDataCacheOffset);
+ } else {
+ printf("Unhandled version\n");
+ }
+ }
+ else if ( options.mode == modeSwiftPtrTables ) {
+ uint64_t cacheBaseAddr = dyldCache->unslidLoadAddress();
+ const SwiftOptimizationHeader* swiftOptHeader = dyldCache->swiftOpt();
+ if ( swiftOptHeader == nullptr ) {
+ printf("No Swift optimization information present\n");
+ return 0;
+ }
+ printf("Swift optimization version: %d\n", swiftOptHeader->version);
+ if ( swiftOptHeader->version == 3 ) {
+ SymbolicatedCache symbolicatedCache(dyldCache, cacheOnDisk);
+ for ( size_t i = 0; i < SwiftOptimizationHeader::MAX_PRESPECIALIZED_METADATA_TABLES; ++i ) {
+ uint64_t ptrTableOffset = swiftOptHeader->prespecializedMetadataHashTableCacheOffsets[i];
+ if ( ptrTableOffset == 0 )
+ continue;
+
+ printf("Swift prespecialized metadata hash table #%lu\n", i);
+ const SwiftHashTable* ptrTable = (const SwiftHashTable*)((uint8_t*)dyldCache + ptrTableOffset);
+
+ ptrTable->forEachValue(^(uint32_t bucketIndex, const dyld3::Array<PointerHashTableValue>& values) {
+ for ( const PointerHashTableValue& value : values ) {
+ printf(" - k: [ ");
+ const uint64_t* keys = ptrTable->getCacheOffsets(value);
+ for ( size_t numKey = 0; numKey < value.numOffsets; ++numKey ) {
+ if ( numKey > 0 )
+ printf(", ");
+ printf("%s (0x%llx)", symbolicatedCache.symbolNameAt(cacheBaseAddr + keys[numKey]).c_str(), cacheBaseAddr + keys[numKey]);
+ }
+ printf(" ]\n v: %s (0x%llx)\n", symbolicatedCache.symbolNameAt(cacheBaseAddr + value.cacheOffset).c_str(), cacheBaseAddr + value.cacheOffset);
+ }
+ });
+ }
+ } else {
+ printf("Unhandled version\n");
+ }
+ }
+ else if ( options.mode == modeLookupVA ) {
+ CString vaString = options.lookupVA;
+
+ SymbolicatedCache symbolicatedCache(dyldCache, cacheOnDisk);
+
+ while ( !vaString.empty() ) {
+ char* endptr = nullptr;
+ uint64_t addr = strtoull(vaString.c_str(), &endptr, 16);
+ if ( addr == 0 )
+ break;
+
+ if ( endptr )
+ ++endptr;
+ vaString = endptr;
+
+ printf("0x%llx\n", addr);
+ std::optional<size_t> rangeIndexOpt = symbolicatedCache.findClosestRange(addr);
+ if ( !rangeIndexOpt )
+ return 0;
+
+ size_t rangeIndex = *rangeIndexOpt;
+
+ const SymbolicatedCache::Range& range = symbolicatedCache.ranges[rangeIndex];
+ const SymbolicatedImage* image = nullptr;
+ if ( range.imageIndex ) {
+ image = &symbolicatedCache.images[*range.imageIndex];
+ printf(" %15s %s\n", "in:", image->image().header()->installName());
+ printf(" %15s 0x%llx\n", "image base:", image->image().header()->preferredLoadAddress());
+ }
+ if ( !range.segmentName.empty() ) {
+ printf(" %15s %.*s,%.*s\n", "segment name:",
+ (int)range.segmentName.size(), range.segmentName.data(),
+ (int)range.sectName.size(), range.sectName.data());
+ }
+ printf(" %15s 0x%llx - 0x%llx\n", "range:", range.startAddr, range.endAddr);
+ printf(" %15s %s\n", "symbol:", symbolicatedCache.symbolNameAt(addr).c_str());
+ }
+ }
+ else if ( options.mode == modeExtract ) {
+ return dyld_shared_cache_extract_dylibs(sharedCachePath, options.extractionDir);
+ }
+ else if ( options.mode == modeObjCImpCaches ) {
+ if (sharedCachePath == nullptr) {
+ fprintf(stderr, "Cannot emit imp caches with live cache. Run again with the path to the cache file\n");
+ return 1;
+ }
+ __block std::map<uint64_t, const char*> methodToClassMap;
+ __block std::map<uint64_t, const char*> classVMAddrToNameMap;
+ const bool contentRebased = false;
+ const uint32_t pointerSize = 8;
+
+ // Get the base pointers from the magic section in objc
+ __block uint64_t objcCacheOffsetsSize = 0;
+ __block const void* objcCacheOffsets = nullptr;
+ __block int impCachesVersion = 1;
+ __block Diagnostics diag;
+ dyldCache->forEachImage(^(const Header* hdr, const char* installName) {
+ if ( !strcmp(installName, "/usr/lib/libobjc.A.dylib") ) {
+ const dyld3::MachOAnalyzer* ma = (const dyld3::MachOAnalyzer*)hdr;
+ objcCacheOffsets = ma->findSectionContent("__DATA_CONST", "__objc_scoffs", objcCacheOffsetsSize);
+ dyld3::MachOAnalyzer::FoundSymbol foundInfo;
+ if (ma->findExportedSymbol(diag, "_objc_opt_preopt_caches_version", false, foundInfo, nullptr)) {
+ impCachesVersion = *(int*)((uint8_t*)ma + foundInfo.value);
+ }
+ }
+ });
+
+ if ( objcCacheOffsets == nullptr ) {
+ fprintf(stderr, "Unable to print imp-caches as cannot find __DATA_CONST __objc_scoffs inside /usr/lib/libobjc.A.dylib\n");
+ return 1;
+ }
+
+ if ( objcCacheOffsetsSize < (4 * pointerSize) ) {
+ fprintf(stderr, "Unable to print imp-caches as __DATA_CONST __objc_scoffs is too small (%lld vs required %u)\n", objcCacheOffsetsSize, (4 * pointerSize));
+ return 1;
+ }
+
+ dyld3::MachOAnalyzer::VMAddrConverter vmAddrConverter = dyldCache->makeVMAddrConverter(contentRebased);
+
+ uint8_t selectorStringIndex = 0;
+ if (impCachesVersion > 1)
+ selectorStringIndex = 1;
+ uint64_t selectorStringVMAddrStart = vmAddrConverter.convertToVMAddr(((uint64_t*)objcCacheOffsets)[selectorStringIndex]);
+ uint64_t selectorStringVMAddrEnd = vmAddrConverter.convertToVMAddr(((uint64_t*)objcCacheOffsets)[selectorStringIndex+1]);
+
+ uint64_t sharedCacheRelativeSelectorBaseVMAddress = dyldCache->sharedCacheRelativeSelectorBaseVMAddress();
+
+ dyldCache->forEachImage(^(const Header *mh, const char *installName) {
+ if (diag.hasError())
+ return;
+
+ const dyld3::MachOAnalyzer* ma = (const dyld3::MachOAnalyzer*)mh;
+ intptr_t slide = ma->getSlide();
+
+ auto visitClass = ^(uint64_t classVMAddr,
+ uint64_t classSuperclassVMAddr,
+ uint64_t classDataVMAddr,
+ const dyld3::MachOAnalyzer::ObjCClassInfo& objcClass,
+ bool isMetaClass,
+ bool& stopClass) {
+ const char* className = (const char*)objcClass.nameVMAddr(pointerSize) + slide;
+ classVMAddrToNameMap[classVMAddr] = className;
+ ma->forEachObjCMethod(objcClass.baseMethodsVMAddr(pointerSize), vmAddrConverter,
+ sharedCacheRelativeSelectorBaseVMAddress,
+ ^(uint64_t methodVMAddr, const dyld3::MachOAnalyzer::ObjCMethod& method, bool& stopMethod) {
+ // const char* methodName = (const char*)(method.nameVMAddr + slide);
+ methodToClassMap[method.impVMAddr] = className;
+ });
+ };
+ ma->forEachObjCClass(diag, vmAddrConverter, visitClass);
+
+ auto visitCategory = ^(uint64_t categoryVMAddr, const dyld3::MachOAnalyzer::ObjCCategory& objcCategory, bool& stopCategory) {
+ ma->forEachObjCMethod(objcCategory.instanceMethodsVMAddr, vmAddrConverter,
+ sharedCacheRelativeSelectorBaseVMAddress,
+ ^(uint64_t methodVMAddr, const dyld3::MachOAnalyzer::ObjCMethod& method, bool& stopMethod) {
+ const char* catName = (const char*)objcCategory.nameVMAddr + slide;
+ // const char* methodName = (const char*)(method.nameVMAddr + slide);
+ methodToClassMap[method.impVMAddr] = catName;
+ });
+
+ ma->forEachObjCMethod(objcCategory.classMethodsVMAddr, vmAddrConverter,
+ sharedCacheRelativeSelectorBaseVMAddress,
+ ^(uint64_t methodVMAddr, const dyld3::MachOAnalyzer::ObjCMethod& method, bool& stopMethod) {
+ const char* catName = (const char*)objcCategory.nameVMAddr + slide;
+ // const char* methodName = (const char*)(method.nameVMAddr + slide);
+ methodToClassMap[method.impVMAddr] = catName;
+ });
+ };
+ ma->forEachObjCCategory(diag, vmAddrConverter, visitCategory);
+ });
+ if (diag.hasError())
+ return 1;
+
+ __block bool anyBadEntry = false;
+ dyldCache->forEachImage(^(const Header *mh, const char *installName) {
+ if (diag.hasError())
+ return;
+
+ const dyld3::MachOAnalyzer* ma = (const dyld3::MachOAnalyzer*)mh;
+ intptr_t slide = ma->getSlide();
+
+ auto visitClass = ^(uint64_t classVMAddr,
+ uint64_t classSuperclassVMAddr,
+ uint64_t classDataVMAddr,
+ const dyld3::MachOAnalyzer::ObjCClassInfo& objcClass,
+ bool isMetaClass,
+ bool& stopClass) {
+ const char* type = "class";
+ if (isMetaClass)
+ type = "meta-class";
+ const char* className = (const char*)objcClass.nameVMAddr(pointerSize) + slide;
+
+ if (objcClass.methodCacheVMAddr == 0) {
+ printf("%s (%s): empty\n", className, type);
+ return;
+ }
+
+ const uint8_t* impCacheBuffer = (const uint8_t*)(objcClass.methodCacheVMAddr + slide);
+ uint32_t cacheMask = 0;
+ uint32_t cacheShift = 0;
+ uint32_t sizeOfHeader = 0;
+ if (impCachesVersion < 3) {
+ const ImpCacheHeader_v1* impCache = (const ImpCacheHeader_v1*)impCacheBuffer;
+ cacheMask = impCache->cache_mask;
+ cacheShift = impCache->cache_shift;
+ sizeOfHeader = sizeof(ImpCacheHeader_v1);
+
+ printf("%s (%s): %d buckets, 0x%X mask, 0x%X shift\n", className, type, impCache->cache_mask + 1, cacheMask, cacheShift);
+ if ((classVMAddr + impCache->fallback_class_offset) != objcClass.superclassVMAddr)
+ printf("Flattening fallback: %s\n", classVMAddrToNameMap[classVMAddr + impCache->fallback_class_offset]);
+ } else {
+ const ImpCacheHeader_v2* impCache = (const ImpCacheHeader_v2*)impCacheBuffer;
+ cacheMask = impCache->cache_mask;
+ cacheShift = impCache->cache_shift;
+ sizeOfHeader = sizeof(ImpCacheHeader_v2);
+
+ printf("%s (%s): %d buckets, 0x%X mask, 0x%X shift\n", className, type, impCache->cache_mask + 1, cacheMask, cacheShift);
+ if ((classVMAddr + impCache->fallback_class_offset) != objcClass.superclassVMAddr)
+ printf("Flattening fallback: %s\n", classVMAddrToNameMap[classVMAddr + impCache->fallback_class_offset]);
+ }
+
+ const uint8_t* buckets = impCacheBuffer + sizeOfHeader;
+ // Buckets are a 32-bit offset from the impcache itself
+ for (uint32_t i = 0; i <= cacheMask ; ++i) {
+ uint64_t sel = 0;
+ uint64_t imp = 0;
+ bool empty = false;
+ uint32_t selOff=0;
+ if (impCachesVersion == 1) {
+ const ImpCacheEntry_v1* bucket = (ImpCacheEntry_v1*)buckets + i;
+ selOff = bucket->selOffset;
+ sel = selectorStringVMAddrStart + bucket->selOffset;
+ imp = classVMAddr - bucket->impOffset;
+ if (bucket->selOffset == 0xFFFFFFF && bucket->impOffset == 0)
+ empty = true;
+ } else {
+ const ImpCacheEntry_v2* bucket = (ImpCacheEntry_v2*)buckets + i;
+ selOff = bucket->selOffset;
+ sel = selectorStringVMAddrStart + bucket->selOffset;
+ imp = classVMAddr - (bucket->impOffset << 2);
+ if (bucket->selOffset == 0x3FFFFFF && bucket->impOffset == 0)
+ empty = true;
+ }
+
+ if ( empty ) {
+ // Empty bucket
+ printf(" - 0x%016llx: %s\n", 0ULL, "");
+ } else {
+ assert(sel < selectorStringVMAddrEnd);
+ auto it = methodToClassMap.find(imp);
+ if (it == methodToClassMap.end()) {
+ fprintf(stderr, "Could not find IMP %llx (for %s)\n", imp, (const char*)(sel + slide));
+ }
+ assert(it != methodToClassMap.end());
+ printf(" - 0x%016llx: %s (from %s) (selOff: 0x%X)\n", imp, (const char*)(sel + slide), it->second, selOff);
+ uint32_t expectedBucket = (selOff >> cacheShift) & cacheMask;
+ if ( expectedBucket != i ) {
+ fprintf(stderr, " [BAD IMP CACHE] - 0x%016llx: %s (from %s) (selOff: 0x%X) (bucket: %d vs expected: %d)\n", imp, (const char*)(sel + slide), it->second, selOff, i, expectedBucket);
+ anyBadEntry = true;
+ }
+ }
+ }
+ };
+ ma->forEachObjCClass(diag, vmAddrConverter, visitClass);
+ });
+ if ( anyBadEntry ) {
+ fprintf(stderr, "IMP cache is malformed\n");
+ exit(1);
+ }
+ } else {
+ switch ( options.mode ) {
+ case modeList: {
+ if ( options.printInodes && !dyldCache->header.dylibsExpectedOnDisk ) {
+ fprintf(stderr, "Error: '-inode' option only valid on simulator shared caches\n");
+ return 1;
+ }
+ // list all dylibs, including their aliases (symlinks to them) with option vmaddr
+ __block std::vector<std::unordered_set<std::string>> indexToPaths;
+ __block std::vector<uint64_t> indexToAddr;
+ __block std::unordered_map<uint64_t, uint64_t> indexToINode;
+ __block std::unordered_map<uint64_t, uint64_t> indexToModTime;
+ __block std::vector<std::string> indexToUUID;
+ dyldCache->forEachImageTextSegment(^(uint64_t loadAddressUnslid, uint64_t textSegmentSize, const unsigned char* dylibUUID, const char* installName, bool& stop) {
+ std::unordered_set<std::string> empty;
+ if ( options.printVMAddrs )
+ indexToAddr.push_back(loadAddressUnslid);
+ if ( options.printUUIDs ) {
+ uuid_string_t uuidString;
+ uuid_unparse_upper(dylibUUID, uuidString);
+ indexToUUID.push_back(uuidString);
+ }
+ indexToPaths.push_back(empty);
+ indexToPaths.back().insert(installName);
+ });
+ dyldCache->forEachDylibPath(^(const char* dylibPath, uint32_t index) {
+ indexToPaths[index].insert(dylibPath);
+
+ uint64_t mTime = ~0ULL;
+ uint64_t inode = ~0ULL;
+ dyldCache->getIndexedImageEntry(index, mTime, inode);
+ indexToINode[index] = inode;
+ indexToModTime[index] = mTime;
+ });
+ int index = 0;
+ for (const std::unordered_set<std::string>& paths : indexToPaths) {
+ for (const std::string& path: paths) {
+ if ( options.printVMAddrs )
+ printf("0x%08llX ", indexToAddr[index]);
+ if ( options.printUUIDs )
+ printf("<%s> ", indexToUUID[index].c_str());
+ if ( options.printInodes )
+ printf("0x%08llX 0x%08llX ", indexToINode[index], indexToModTime[index]);
+ printf("%s\n", path.c_str());
+ }
+ ++index;
+ }
+ break;
+ }
+ case modeListDylibsWithSection: {
+ dyldCache->forEachImage(^(const Header* hdr, const char* installName) {
+ hdr->forEachSection(^(const Header::SectionInfo& sectInfo, bool& stop) {
+ if ( (sectInfo.sectionName == options.sectionName) && (sectInfo.segmentName == options.segmentName) ) {
+ printf("%s\n", installName);
+ stop = true;
+ }
+ });
+ });
+ break;
+ }
+ case modeMap: {
+ __block std::map<uint64_t, const char*> dataSegNames;
+ __block std::map<uint64_t, uint64_t> dataSegEnds;
+ dyldCache->forEachImage(^(const Header* hdr, const char* installName) {
+ hdr->forEachSegment(^(const Header::SegmentInfo &info, bool &stop) {
+ printf("0x%08llX - 0x%08llX %.*s %s\n", info.vmaddr, info.vmaddr + info.vmsize,
+ (int)info.segmentName.size(), info.segmentName.data(),
+ installName);
+ if ( info.segmentName.starts_with("__DATA") ) {
+ dataSegNames[info.vmaddr] = installName;
+ dataSegEnds[info.vmaddr] = info.vmaddr + info.vmsize;
+ }
+ });
+ });
+ // <rdar://problem/51084507> Enhance dyld_shared_cache_util to show where section alignment added padding
+ uint64_t lastEnd = 0;
+ for (const auto& entry : dataSegEnds) {
+ uint64_t padding = entry.first - lastEnd;
+ if ( (padding > 32) && (lastEnd != 0) ) {
+ printf("0x%08llX - 0x%08llX PADDING %lluKB\n", lastEnd, entry.first, padding/1024);
+ }
+ lastEnd = entry.second;
+ }
+ break;
+ }
+ case modeDependencies: {
+ __block bool dependentTargetFound = false;
+ dyldCache->forEachImage(^(const Header* hdr, const char* installName) {
+ if ( strcmp(options.dependentsOfPath, installName) != 0 )
+ return;
+ dependentTargetFound = true;
+
+ auto printDep = [&options](const char *loadPath, uint32_t compatVersion, uint32_t curVersion) {
+ if ( options.printDylibVersions ) {
+ uint32_t compat_vers = compatVersion;
+ uint32_t current_vers = curVersion;
+ printf("\t%s", loadPath);
+ if ( compat_vers != 0xFFFFFFFF ) {
+ printf("(compatibility version %u.%u.%u, current version %u.%u.%u)\n",
+ (compat_vers >> 16),
+ (compat_vers >> 8) & 0xff,
+ (compat_vers) & 0xff,
+ (current_vers >> 16),
+ (current_vers >> 8) & 0xff,
+ (current_vers) & 0xff);
+ }
+ else {
+ printf("\n");
+ }
+ }
+ else {
+ printf("\t%s\n", loadPath);
+ }
+ };
+
+ dyld3::MachOFile* mf = (dyld3::MachOFile*)hdr;
+
+ // First print out our dylib and version.
+ const char* dylibInstallName;
+ Version32 currentVersion;
+ Version32 compatVersion;
+ if ( hdr->getDylibInstallName(&dylibInstallName, &compatVersion, ¤tVersion) ) {
+ printDep(dylibInstallName, compatVersion.value(), currentVersion.value());
+ }
+
+ // Then the dependent dylibs.
+ mf->forEachDependentDylib(^(const char* depPath, bool isWeak, bool isReExport, bool isUpward, uint32_t cpatVersion, uint32_t curVersion, bool& stop) {
+ printDep(depPath, cpatVersion, curVersion);
+ });
+ });
+ if (options.dependentsOfPath && !dependentTargetFound) {
+ fprintf(stderr, "Error: could not find '%s' in the shared cache at\n %s\n", options.dependentsOfPath, sharedCachePath);
+ exit(1);
+ }
+ break;
+ }
+ case modeLinkEdit: {
+ std::map<uint32_t, const char*> pageToContent;
+ auto add_linkedit = [&pageToContent](uint32_t pageStart, uint32_t pageEnd, const char* message) {
+ for (uint32_t p = pageStart; p <= pageEnd; p += 4096) {
+ std::map<uint32_t, const char*>::iterator pos = pageToContent.find(p);
+ if ( pos == pageToContent.end() ) {
+ pageToContent[p] = strdup(message);
+ }
+ else {
+ const char* oldMessage = pos->second;
+ char* newMesssage;
+ asprintf(&newMesssage, "%s, %s", oldMessage, message);
+ pageToContent[p] = newMesssage;
+ ::free((void*)oldMessage);
+ }
+ }
+ };
+
+ dyldCache->forEachImage(^(const Header* hdr, const char* installName) {
+ dyld3::MachOAnalyzer* ma = (dyld3::MachOAnalyzer*)hdr;
+ Diagnostics diag;
+ dyld3::MachOAnalyzer::LinkEditInfo leInfo;
+ ma->getLinkEditPointers(diag, leInfo);
+
+ if (diag.hasError())
+ return;
+
+ char message[1000];
+ const char* shortName = strrchr(installName, '/') + 1;
+
+ if ( leInfo.dyldInfo != nullptr ) {
+ // add export trie info
+ if ( leInfo.dyldInfo->export_size != 0 ) {
+ //printf("export_off=0x%X\n", leInfo.dyldInfo->export_off());
+ uint32_t exportPageOffsetStart = leInfo.dyldInfo->export_off & (-4096);
+ uint32_t exportPageOffsetEnd = (leInfo.dyldInfo->export_off + leInfo.dyldInfo->export_size) & (-4096);
+ snprintf(message, sizeof(message), "exports from %s", shortName);
+ add_linkedit(exportPageOffsetStart, exportPageOffsetEnd, message);
+ }
+ // add binding info
+ if ( leInfo.dyldInfo->bind_size != 0 ) {
+ uint32_t bindPageOffsetStart = leInfo.dyldInfo->bind_off & (-4096);
+ uint32_t bindPageOffsetEnd = (leInfo.dyldInfo->bind_off + leInfo.dyldInfo->bind_size) & (-4096);
+ snprintf(message, sizeof(message), "bindings from %s", shortName);
+ add_linkedit(bindPageOffsetStart, bindPageOffsetEnd, message);
+ }
+ // add lazy binding info
+ if ( leInfo.dyldInfo->lazy_bind_size != 0 ) {
+ uint32_t lazybindPageOffsetStart = leInfo.dyldInfo->lazy_bind_off & (-4096);
+ uint32_t lazybindPageOffsetEnd = (leInfo.dyldInfo->lazy_bind_off + leInfo.dyldInfo->lazy_bind_size) & (-4096);
+ snprintf(message, sizeof(message), "lazy bindings from %s", shortName);
+ add_linkedit(lazybindPageOffsetStart, lazybindPageOffsetEnd, message);
+ }
+ // add weak binding info
+ if ( leInfo.dyldInfo->weak_bind_size != 0 ) {
+ uint32_t weakbindPageOffsetStart = leInfo.dyldInfo->weak_bind_off & (-4096);
+ uint32_t weakbindPageOffsetEnd = (leInfo.dyldInfo->weak_bind_off + leInfo.dyldInfo->weak_bind_size) & (-4096);
+ snprintf(message, sizeof(message), "weak bindings from %s", shortName);
+ add_linkedit(weakbindPageOffsetStart, weakbindPageOffsetEnd, message);
+ }
+ } else {
+ // add export trie info
+ if ( (leInfo.exportsTrie != nullptr) && (leInfo.exportsTrie->datasize != 0) ) {
+ //printf("export_off=0x%X\n", leInfo.exportsTrie->export_off());
+ uint32_t exportPageOffsetStart = leInfo.exportsTrie->dataoff & (-4096);
+ uint32_t exportPageOffsetEnd = (leInfo.exportsTrie->dataoff + leInfo.exportsTrie->datasize) & (-4096);
+ snprintf(message, sizeof(message), "exports from %s", shortName);
+ add_linkedit(exportPageOffsetStart, exportPageOffsetEnd, message);
+ }
+ // Chained fixups are stripped from cache binaries, so no need to check for them here
+ }
+ });
+
+ for (std::map<uint32_t, const char*>::iterator it = pageToContent.begin(); it != pageToContent.end(); ++it) {
+ printf("0x%08X %s\n", it->first, it->second);
+ }
+ break;
+ }
+ case modeSize: {
+ struct TextInfo {
+ uint64_t textSize;
+ const char* path;
+ };
+ __block std::vector<TextInfo> textSegments;
+ dyldCache->forEachImage(^(const Header* hdr, const char* installName) {
+ hdr->forEachSegment(^(const Header::SegmentInfo &info, bool &stop) {
+ if ( info.segmentName != "__TEXT" )
+ return;
+ textSegments.push_back({ info.fileSize, installName });
+ });
+ });
+ std::sort(textSegments.begin(), textSegments.end(), [](const TextInfo& left, const TextInfo& right) {
+ return (left.textSize > right.textSize);
+ });
+ for (std::vector<TextInfo>::iterator it = textSegments.begin(); it != textSegments.end(); ++it) {
+ printf(" 0x%08llX %s\n", it->textSize, it->path);
+ }
+ break;
+ }
+ case modeFunctionVariants: {
+ printf("Function Variant table size: %lld bytes\n", dyldCache->header.functionVariantInfoSize);
+ uintptr_t cacheSlide = dyldCache->slide();
+ dyldCache->forEachFunctionVariantPatchLocation(^(const void* loc, PointerMetaData pmd, const mach_o::FunctionVariants& fvs, const mach_o::Header* dylibHdr, int variantIndex, bool& stop) {
+ if ( pmd.authenticated ) {
+ printf(" fixup-loc=%p (key=%d, addr=%d, diversity=0x%04X), header-of-dylib-with-variant=%p, variant-index=%d\n",
+ (void*)((uintptr_t)loc - cacheSlide), pmd.key, pmd.usesAddrDiversity, pmd.diversity, (void*)((uintptr_t)dylibHdr - cacheSlide), variantIndex);
+ }
+ else {
+ printf(" fixup-loc=%p, header-of-dylib-with-variant=%p, variant-index=%d\n", (void*)((uintptr_t)loc - cacheSlide), (void*)((uintptr_t)dylibHdr - cacheSlide), variantIndex);
+ }
+ });
+ break;
+ }
+ case modePatchTable: {
+ printf("Patch table size: %lld bytes\n", dyldCache->header.patchInfoSize);
+
+ uint64_t cacheBaseAddress = dyldCache->unslidLoadAddress();
+ std::vector<SegmentInfo> segInfos;
+ buildSegmentInfo(dyldCache, segInfos);
+ __block uint32_t imageIndex = 0;
+ __block std::unordered_map<CString, PatchPageMetric> pagesPerSymbol;
+
+ dyldCache->forEachImage(^(const Header* hdr, const char* installName) {
+ printf("%s:\n", installName);
+ uint64_t dylibBaseAddress = hdr->preferredLoadAddress();
+ dyldCache->forEachPatchableExport(imageIndex, ^(uint32_t dylibVMOffsetOfImpl, const char* exportName,
+ PatchKind patchKind) {
+ uint64_t cacheOffsetOfImpl = (dylibBaseAddress + dylibVMOffsetOfImpl) - cacheBaseAddress;
+ printf(" export: 0x%08llX%s %s\n", cacheOffsetOfImpl,
+ PatchTable::patchKindName(patchKind), exportName);
+
+ CString exportNameStr(exportName);
+ dyldCache->forEachPatchableUseOfExport(imageIndex, dylibVMOffsetOfImpl,
+ ^(uint32_t userImageIndex, uint32_t userVMOffset,
+ dyld3::MachOLoaded::PointerMetaData pmd, uint64_t addend,
+ bool isWeakImport) {
+ // Get the image so that we can convert from dylib offset to cache offset
+ uint64_t mTime;
+ uint64_t inode;
+ const Header* imageHdr = (const Header*)(dyldCache->getIndexedImageEntry(userImageIndex, mTime, inode));
+ if ( imageHdr == nullptr )
+ return;
+
+ SegmentInfo usageAt;
+ const uint64_t patchLocVmAddr = imageHdr->preferredLoadAddress() + userVMOffset;
+ const uint64_t patchLocCacheOffset = patchLocVmAddr - cacheBaseAddress;
+ findImageAndSegment(dyldCache, segInfos, patchLocCacheOffset, &usageAt);
+
+ if ( !patchKindIsRootOptimized(patchKind) )
+ pagesPerSymbol[exportNameStr].addUse(patchLocVmAddr);
+
+ // Verify that findImage and the callback image match
+ std::string_view userInstallName = imageHdr->installName();
+
+ // FIXME: We can't get this from MachoLoaded without having a fixup location to call
+ static const char* keyNames[] = {
+ "IA", "IB", "DA", "DB"
+ };
+
+ uint64_t sectionOffset = patchLocVmAddr-usageAt.vmAddr;
+
+ const char* weakImportString = isWeakImport ? " (weak-import)" : "";
+
+ if ( addend == 0 ) {
+ if ( pmd.authenticated ) {
+ printf(" used by: %.*s(0x%04llX)%s (PAC: div=%d, addr=%s, key=%s) in %s\n",
+ (int)usageAt.segName.size(), usageAt.segName.data(),
+ sectionOffset, weakImportString,
+ pmd.diversity, pmd.usesAddrDiversity ? "true" : "false", keyNames[pmd.key],
+ userInstallName.data());
+ } else {
+ printf(" used by: %.*s(0x%04llX)%s in %s\n",
+ (int)usageAt.segName.size(), usageAt.segName.data(),
+ sectionOffset, weakImportString, userInstallName.data());
+ }
+ } else {
+ if ( pmd.authenticated ) {
+ printf(" used by: %.*s(0x%04llX)%s (addend=%lld) (PAC: div=%d, addr=%s, key=%s) in %s\n",
+ (int)usageAt.segName.size(), usageAt.segName.data(),
+ sectionOffset, weakImportString, addend,
+ pmd.diversity, pmd.usesAddrDiversity ? "true" : "false", keyNames[pmd.key],
+ userInstallName.data());
+ } else {
+ printf(" used by: %.*s(0x%04llX)%s (addend=%lld) in %s\n",
+ (int)usageAt.segName.size(), usageAt.segName.data(),
+ sectionOffset, weakImportString,
+ addend, userInstallName.data());
+ }
+ }
+ });
+
+ // Print GOT uses
+ dyldCache->forEachPatchableGOTUseOfExport(imageIndex, dylibVMOffsetOfImpl,
+ ^(uint64_t cacheVMOffset,
+ dyld3::MachOLoaded::PointerMetaData pmd, uint64_t addend,
+ bool isWeakImport) {
+
+ // FIXME: We can't get this from MachoLoaded without having a fixup location to call
+ static const char* keyNames[] = {
+ "IA", "IB", "DA", "DB"
+ };
+
+ if ( !patchKindIsRootOptimized(patchKind) )
+ pagesPerSymbol["GOT"].addUse(cacheBaseAddress + cacheVMOffset);
+
+ const char* weakImportString = isWeakImport ? " (weak-import)" : "";
+ if ( addend == 0 ) {
+ if ( pmd.authenticated ) {
+ printf(" used by: GOT%s (0x%llx) (PAC: div=%d, addr=%s, key=%s)\n",
+ weakImportString, cacheVMOffset, pmd.diversity, pmd.usesAddrDiversity ? "true" : "false", keyNames[pmd.key]);
+ } else {
+ printf(" used by: GOT%s (0x%llx)\n", weakImportString, cacheVMOffset);
+ }
+ } else {
+ if ( pmd.authenticated ) {
+ printf(" used by: GOT%s (0x%llx) (addend=%lld) (PAC: div=%d, addr=%s, key=%s)\n",
+ weakImportString, cacheVMOffset, addend, pmd.diversity, pmd.usesAddrDiversity ? "true" : "false", keyNames[pmd.key]);
+ } else {
+ printf(" used by: GOT%s (0x%llx) (addend=%lld)\n", weakImportString, cacheVMOffset, addend);
+ }
+ }
+ });
+ });
+ ++imageIndex;
+ });
+
+ logCostOfRootPerSymbol(pagesPerSymbol);
+ break;
+ }
+ case modeDumpPatchTable: {
+ PatchTable patchTable(dyldCache->patchTable(), dyldCache->header.patchInfoAddr);
+ patchTable.dump();
+ break;
+ }
+ case modeRootsCost: {
+ std::vector<SegmentInfo> segInfos;
+ buildSegmentInfo(dyldCache, segInfos);
+
+ __block std::optional<uint32_t> rootImageIndex;
+ {
+ __block uint32_t imageIndex = 0;
+ dyldCache->forEachImage(^(const Header* hdr, const char* installName) {
+ if ( strcmp(installName, options.rootsCostOfDylib) == 0 )
+ rootImageIndex = imageIndex;
+ ++imageIndex;
+ });
+ }
+
+ if ( !rootImageIndex.has_value() ) {
+ fprintf(stderr, "Could not find image '%s' in shared cache\n", options.rootsCostOfDylib);
+ return 1;
+ }
+
+ // For each page of the cache, we record if it was dirtied by patching, and by which dylibs
+ typedef std::pair<const char*, std::string_view> InstallNameAndSegment;
+ __block std::map<uint64_t, std::set<InstallNameAndSegment>> pages;
+ __block std::unordered_map<CString, PatchPageMetric> pagesPerSymbol;
+
+ uint64_t cacheBaseAddress = dyldCache->unslidLoadAddress();
+ dyldCache->forEachPatchableExport(rootImageIndex.value(),
+ ^(uint32_t dylibVMOffsetOfImpl, const char* exportName,
+ PatchKind patchKind) {
+ if ( patchKindIsRootOptimized(patchKind) )
+ return;
+
+ CString exportNameStr(exportName);
+ dyldCache->forEachPatchableUseOfExport(rootImageIndex.value(), dylibVMOffsetOfImpl,
+ ^(uint32_t userImageIndex, uint32_t userVMOffset,
+ dyld3::MachOLoaded::PointerMetaData pmd, uint64_t addend,
+ bool isWeakImport) {
+ // Get the image so that we can convert from dylib offset to cache offset
+ uint64_t mTime;
+ uint64_t inode;
+ const dyld3::MachOAnalyzer* imageMA = (dyld3::MachOAnalyzer*)(dyldCache->getIndexedImageEntry(userImageIndex, mTime, inode));
+ if ( imageMA == nullptr )
+ return;
+
+ SegmentInfo usageAt;
+ const uint64_t patchLocVmAddr = ((const Header*)imageMA)->preferredLoadAddress() + userVMOffset;
+ const uint64_t patchLocCacheOffset = patchLocVmAddr - cacheBaseAddress;
+ findImageAndSegment(dyldCache, segInfos, patchLocCacheOffset, &usageAt);
+
+ // Round to the 16KB page we dirty
+ //clientUsedPages[userImageIndex].insert(usageAt.vmAddr & ~0x3FFF);
+ uint64_t pageAddr = patchLocVmAddr & ~0x3FFF;
+ pages[pageAddr].insert({ usageAt.installName, usageAt.segName });
+ pagesPerSymbol[exportNameStr].addUse(pageAddr);
+ });
+
+ // Print GOT uses
+ dyldCache->forEachPatchableGOTUseOfExport(rootImageIndex.value(), dylibVMOffsetOfImpl,
+ ^(uint64_t cacheVMOffset,
+ dyld3::MachOLoaded::PointerMetaData pmd, uint64_t addend,
+ bool isWeakImport) {
+ // Round to the 16KB page we dirty
+ //gotUsedPages.insert((cacheBaseAddress + cacheVMOffset) & ~0x3FFF);
+ uint64_t pageAddr = (cacheBaseAddress + cacheVMOffset) & ~0x3FFF;
+ pages[pageAddr].insert({ "GOT", "" });
+ pagesPerSymbol["GOT"].addUse(pageAddr);
+ });
+ });
+
+ // Print the results
+ printf("Cost of root of '%s' is %lld pages:\n", options.rootsCostOfDylib, (uint64_t)pages.size());
+
+ for ( const auto& page : pages ) {
+ printf("0x%08llx ", page.first);
+
+ bool needsComma = false;
+ for ( const InstallNameAndSegment& installNameAndSegment : page.second ) {
+ if ( needsComma )
+ printf(", ");
+ needsComma = true;
+
+ const char* leafName = strrchr(installNameAndSegment.first, '/');
+ if ( leafName == NULL )
+ leafName = installNameAndSegment.first;
+ else
+ leafName++;
+
+ if ( !installNameAndSegment.second.empty() )
+ printf("%s(%.*s)", leafName, (int)installNameAndSegment.second.size(), installNameAndSegment.second.data());
+ else
+ printf("%s", leafName);
+ }
+ printf("\n");
+ }
+
+ logCostOfRootPerSymbol(pagesPerSymbol);
+ break;
+ }
+ case modeMachHeaders: {
+ auto printRow = [](const char* magic, const char* arch, const char* filetype,
+ const char* ncmds, const char* sizeofcmds , const char* flags,
+ const char* installname) {
+ printf("%12s %8s %8s %8s %12s %12s %8s\n",
+ magic, arch, filetype, ncmds, sizeofcmds , flags, installname);
+ };
+
+ printRow("magic", "arch", "filetype", "ncmds", "sizeofcmds", "flags", "installname");
+ dyldCache->forEachDylib(^(const Header *mh, const char *installName, uint32_t imageIndex, uint64_t inode, uint64_t mtime, bool &stop) {
+ const dyld3::MachOFile* mf = (const dyld3::MachOFile*)mh;
+ const char* magic = nullptr;
+ if ( mf->magic == MH_MAGIC )
+ magic = "MH_MAGIC";
+ else if ( mf->magic == MH_MAGIC_64 )
+ magic = "MH_MAGIC_64";
+ else if ( mf->magic == MH_CIGAM )
+ magic = "MH_CIGAM";
+ else if ( mf->magic == MH_CIGAM_64 )
+ magic = "MH_CIGAM_64";
+
+ const char* arch = mf->archName();
+ const char* filetype = mf->isDylib() ? "DYLIB" : "UNKNOWN";
+ std::string ncmds = json::decimal(mf->ncmds);
+ std::string sizeofcmds = json::decimal(mf->sizeofcmds);
+ std::string flags = json::hex(mf->flags);
+
+ printRow(magic, arch, filetype, ncmds.c_str(), sizeofcmds.c_str(), flags.c_str(), installName);
+ });
+
+ break;
+ }
+ case modeCacheHeader: {
+ __block uint32_t cacheIndex = 0;
+ dyldCache->forEachCache(^(const DyldSharedCache *cache, bool &stopCache) {
+ printf("Cache #%d\n", cacheIndex);
+
+ uuid_string_t uuidString;
+ uuid_unparse_upper(dyldCache->header.uuid, uuidString);
+
+ uuid_string_t symbolFileUUIDString;
+ uuid_unparse_upper(dyldCache->header.symbolFileUUID, symbolFileUUIDString);
+
+ printf(" - magic: %s\n", dyldCache->header.magic);
+ printf(" - mappingOffset: 0x%llx\n", (uint64_t)dyldCache->header.mappingOffset);
+ printf(" - mappingCount: 0x%llx\n", (uint64_t)dyldCache->header.mappingCount);
+ printf(" - imagesOffsetOld: 0x%llx\n", (uint64_t)dyldCache->header.imagesOffsetOld);
+ printf(" - imagesCountOld: 0x%llx\n", (uint64_t)dyldCache->header.imagesCountOld);
+ printf(" - dyldBaseAddress: 0x%llx\n", (uint64_t)dyldCache->header.dyldBaseAddress);
+ printf(" - codeSignatureOffset: 0x%llx\n", (uint64_t)dyldCache->header.codeSignatureOffset);
+ printf(" - codeSignatureSize: 0x%llx\n", (uint64_t)dyldCache->header.codeSignatureSize);
+ printf(" - slideInfoOffsetUnused: 0x%llx\n", (uint64_t)dyldCache->header.slideInfoOffsetUnused);
+ printf(" - slideInfoSizeUnused: 0x%llx\n", (uint64_t)dyldCache->header.slideInfoSizeUnused);
+ printf(" - localSymbolsOffset: 0x%llx\n", (uint64_t)dyldCache->header.localSymbolsOffset);
+ printf(" - localSymbolsSize: 0x%llx\n", (uint64_t)dyldCache->header.localSymbolsSize);
+ printf(" - uuid: %s\n", uuidString);
+ printf(" - cacheType: 0x%llx\n", (uint64_t)dyldCache->header.cacheType);
+ printf(" - branchPoolsOffset: 0x%llx\n", (uint64_t)dyldCache->header.branchPoolsOffset);
+ printf(" - branchPoolsCount: 0x%llx\n", (uint64_t)dyldCache->header.branchPoolsCount);
+ printf(" - dyldInCacheMH: 0x%llx\n", (uint64_t)dyldCache->header.dyldInCacheMH);
+ printf(" - dyldInCacheEntry: 0x%llx\n", (uint64_t)dyldCache->header.dyldInCacheEntry);
+ printf(" - imagesTextOffset: 0x%llx\n", (uint64_t)dyldCache->header.imagesTextOffset);
+ printf(" - imagesTextCount: 0x%llx\n", (uint64_t)dyldCache->header.imagesTextCount);
+ printf(" - patchInfoAddr: 0x%llx\n", (uint64_t)dyldCache->header.patchInfoAddr);
+ printf(" - patchInfoSize: 0x%llx\n", (uint64_t)dyldCache->header.patchInfoSize);
+ printf(" - otherImageGroupAddrUnused: 0x%llx\n", (uint64_t)dyldCache->header.otherImageGroupAddrUnused);
+ printf(" - otherImageGroupSizeUnused: 0x%llx\n", (uint64_t)dyldCache->header.otherImageGroupSizeUnused);
+ printf(" - progClosuresAddr: 0x%llx\n", (uint64_t)dyldCache->header.progClosuresAddr);
+ printf(" - progClosuresSize: 0x%llx\n", (uint64_t)dyldCache->header.progClosuresSize);
+ printf(" - progClosuresTrieAddr: 0x%llx\n", (uint64_t)dyldCache->header.progClosuresTrieAddr);
+ printf(" - progClosuresTrieSize: 0x%llx\n", (uint64_t)dyldCache->header.progClosuresTrieSize);
+ printf(" - platform: 0x%llx\n", (uint64_t)dyldCache->header.platform);
+ printf(" - formatVersion: 0x%llx\n", (uint64_t)dyldCache->header.formatVersion);
+ printf(" - dylibsExpectedOnDisk: 0x%llx\n", (uint64_t)dyldCache->header.dylibsExpectedOnDisk);
+ printf(" - simulator: 0x%llx\n", (uint64_t)dyldCache->header.simulator);
+ printf(" - locallyBuiltCache: 0x%llx\n", (uint64_t)dyldCache->header.locallyBuiltCache);
+ printf(" - builtFromChainedFixups: 0x%llx\n", (uint64_t)dyldCache->header.builtFromChainedFixups);
+ printf(" - padding: 0x%llx\n", (uint64_t)dyldCache->header.padding);
+ printf(" - sharedRegionStart: 0x%llx\n", (uint64_t)dyldCache->header.sharedRegionStart);
+ printf(" - sharedRegionSize: 0x%llx\n", (uint64_t)dyldCache->header.sharedRegionSize);
+ printf(" - maxSlide: 0x%llx\n", (uint64_t)dyldCache->header.maxSlide);
+ printf(" - dylibsImageArrayAddr: 0x%llx\n", (uint64_t)dyldCache->header.dylibsImageArrayAddr);
+ printf(" - dylibsImageArraySize: 0x%llx\n", (uint64_t)dyldCache->header.dylibsImageArraySize);
+ printf(" - dylibsTrieAddr: 0x%llx\n", (uint64_t)dyldCache->header.dylibsTrieAddr);
+ printf(" - dylibsTrieSize: 0x%llx\n", (uint64_t)dyldCache->header.dylibsTrieSize);
+ printf(" - otherImageArrayAddr: 0x%llx\n", (uint64_t)dyldCache->header.otherImageArrayAddr);
+ printf(" - otherImageArraySize: 0x%llx\n", (uint64_t)dyldCache->header.otherImageArraySize);
+ printf(" - otherTrieAddr: 0x%llx\n", (uint64_t)dyldCache->header.otherTrieAddr);
+ printf(" - otherTrieSize: 0x%llx\n", (uint64_t)dyldCache->header.otherTrieSize);
+ printf(" - mappingWithSlideOffset: 0x%llx\n", (uint64_t)dyldCache->header.mappingWithSlideOffset);
+ printf(" - mappingWithSlideCount: 0x%llx\n", (uint64_t)dyldCache->header.mappingWithSlideCount);
+ printf(" - dylibsPBLStateArrayAddrUnused: 0x%llx\n", (uint64_t)dyldCache->header.dylibsPBLStateArrayAddrUnused);
+ printf(" - dylibsPBLSetAddr: 0x%llx\n", (uint64_t)dyldCache->header.dylibsPBLSetAddr);
+ printf(" - programsPBLSetPoolAddr: 0x%llx\n", (uint64_t)dyldCache->header.programsPBLSetPoolAddr);
+ printf(" - programsPBLSetPoolSize: 0x%llx\n", (uint64_t)dyldCache->header.programsPBLSetPoolSize);
+ printf(" - programTrieAddr: 0x%llx\n", (uint64_t)dyldCache->header.programTrieAddr);
+ printf(" - programTrieSize: 0x%llx\n", (uint64_t)dyldCache->header.programTrieSize);
+ printf(" - osVersion: 0x%llx\n", (uint64_t)dyldCache->header.osVersion);
+ printf(" - altPlatform: 0x%llx\n", (uint64_t)dyldCache->header.altPlatform);
+ printf(" - altOsVersion: 0x%llx\n", (uint64_t)dyldCache->header.altOsVersion);
+ printf(" - swiftOptsOffset: 0x%llx\n", (uint64_t)dyldCache->header.swiftOptsOffset);
+ printf(" - swiftOptsSize: 0x%llx\n", (uint64_t)dyldCache->header.swiftOptsSize);
+ printf(" - subCacheArrayOffset: 0x%llx\n", (uint64_t)dyldCache->header.subCacheArrayOffset);
+ printf(" - subCacheArrayCount: 0x%llx\n", (uint64_t)dyldCache->header.subCacheArrayCount);
+ printf(" - symbolFileUUID: %s\n", symbolFileUUIDString);
+ printf(" - rosettaReadOnlyAddr: 0x%llx\n", (uint64_t)dyldCache->header.rosettaReadOnlyAddr);
+ printf(" - rosettaReadOnlySize: 0x%llx\n", (uint64_t)dyldCache->header.rosettaReadOnlySize);
+ printf(" - rosettaReadWriteAddr: 0x%llx\n", (uint64_t)dyldCache->header.rosettaReadWriteAddr);
+ printf(" - rosettaReadWriteSize: 0x%llx\n", (uint64_t)dyldCache->header.rosettaReadWriteSize);
+ printf(" - imagesOffset: 0x%llx\n", (uint64_t)dyldCache->header.imagesOffset);
+ printf(" - imagesCount: 0x%llx\n", (uint64_t)dyldCache->header.imagesCount);
+ printf(" - cacheSubType: 0x%llx\n", (uint64_t)dyldCache->header.cacheSubType);
+ printf(" - objcOptsOffset: 0x%llx\n", (uint64_t)dyldCache->header.objcOptsOffset);
+ printf(" - cacheAtlasOffset: 0x%llx\n", (uint64_t)dyldCache->header.cacheAtlasOffset);
+ printf(" - cacheAtlasSize: 0x%llx\n", (uint64_t)dyldCache->header.cacheAtlasSize);
+ printf(" - dynamicDataOffset: 0x%llx\n", (uint64_t)dyldCache->header.dynamicDataOffset);
+ printf(" - dynamicDataMaxSize: 0x%llx\n", (uint64_t)dyldCache->header.dynamicDataMaxSize);
+ printf(" - tproMappingsOffset: 0x%llx\n", (uint64_t)dyldCache->header.tproMappingsOffset);
+ printf(" - tproMappingsCount: 0x%llx\n", (uint64_t)dyldCache->header.tproMappingsCount);
+ printf(" - functionVariantInfoAddr: 0x%llx\n", (uint64_t)dyldCache->header.functionVariantInfoAddr);
+ printf(" - functionVariantInfoSize: 0x%llx\n", (uint64_t)dyldCache->header.functionVariantInfoSize);
+ ++cacheIndex;
+ });
+ break;
+ }
+ case modeDylibSymbols:
+ {
+ dyldCache->forEachImage(^(const Header* hdr, const char* installName) {
+ const dyld3::MachOAnalyzer* ma = (dyld3::MachOAnalyzer*)hdr;
+ Diagnostics diag;
+
+ printf("%s globals:\n", installName);
+ ma->forEachGlobalSymbol(diag, ^(const char *symbolName, uint64_t n_value, uint8_t n_type, uint8_t n_sect, uint16_t n_desc, bool &stop) {
+ printf(" 0x%08llX: %s\n", n_value, symbolName);
+ });
+ printf("%s locals:\n", installName);
+ ma->forEachLocalSymbol(diag, ^(const char *symbolName, uint64_t n_value, uint8_t n_type, uint8_t n_sect, uint16_t n_desc, bool &stop) {
+ printf(" 0x%08llX: %s\n", n_value, symbolName);
+ });
+ printf("%s undefs:\n", installName);
+ ma->forEachImportedSymbol(diag, ^(const char *symbolName, uint64_t n_value, uint8_t n_type, uint8_t n_sect, uint16_t n_desc, bool &stop) {
+ printf(" undef: %s\n", symbolName);
+ });
+ });
+ break;
+ }
+ case modeFunctionStarts: {
+ dyldCache->forEachImage(^(const Header* hdr, const char* installName) {
+ printf("%s:\n", installName);
+ uint64_t loadAddress = hdr->preferredLoadAddress();
+ Diagnostics diag;
+ const dyld3::MachOAnalyzer* ma = (dyld3::MachOAnalyzer*)hdr;
+ ma->forEachFunctionStart(^(uint64_t runtimeOffset) {
+ uint64_t targetVMAddr = loadAddress + runtimeOffset;
+ printf(" 0x%08llX\n", targetVMAddr);
+ });
+ });
+ break;
+ }
+ case modePrewarmingData: {
+ printf("prewarming_data:\n");
+ dyldCache->forEachPrewarmingEntry(^(const void *content, uint64_t unslidVMAddr, uint64_t vmSize) {
+ printf("0x%08llx -> 0x%08llx\n", unslidVMAddr, unslidVMAddr + vmSize);
+ });
+ break;
+ }
+ case modeDuplicates:
+ case modeDuplicatesSummary:
+ {
+ __block std::map<std::string, std::vector<const char*>> symbolsToInstallNames;
+ __block std::set<std::string> weakDefSymbols;
+ dyldCache->forEachImage(^(const Header* hdr, const char* installName) {
+ const dyld3::MachOAnalyzer* ma = (dyld3::MachOAnalyzer*)hdr;
+ uint32_t exportTrieRuntimeOffset;
+ uint32_t exportTrieSize;
+ if ( ma->hasExportTrie(exportTrieRuntimeOffset, exportTrieSize) ) {
+ const uint8_t* start = (uint8_t*)hdr + exportTrieRuntimeOffset;
+ const uint8_t* end = start + exportTrieSize;
+ std::vector<ExportInfoTrie::Entry> exports;
+ if ( ExportInfoTrie::parseTrie(start, end, exports) ) {
+ for (const ExportInfoTrie::Entry& entry: exports) {
+ if ( (entry.info.flags & EXPORT_SYMBOL_FLAGS_REEXPORT) == 0 ) {
+ symbolsToInstallNames[entry.name].push_back(installName);
+ if ( entry.info.flags & EXPORT_SYMBOL_FLAGS_WEAK_DEFINITION ) {
+ weakDefSymbols.insert(entry.name);
+ }
+ }
+ }
+ }
+ }
+ });
+ // filter out unzippered twins
+ std::set<std::string> okTwinSymbols;
+ for (const auto& pos : symbolsToInstallNames) {
+ const std::vector<const char*>& paths = pos.second;
+ if ( paths.size() == 2 ) {
+ // ignore unzippered twins
+ const char* one = paths[0];
+ const char* two = paths[1];
+ if ( (strncmp(one, "/System/iOSSupport/", 19) == 0) || (strncmp(two, "/System/iOSSupport/", 19) == 0) ) {
+ if ( const char* tailOne = Utils::strrstr(one, ".framework/") ) {
+ if ( const char* tailTwo = Utils::strrstr(two, ".framework/") ) {
+ if ( strcmp(tailOne, tailTwo) == 0 )
+ okTwinSymbols.insert(pos.first);
+ }
+ }
+ }
+ }
+ }
+ std::erase_if(symbolsToInstallNames, [&](auto const& pos) { return okTwinSymbols.count(pos.first); });
+
+ if ( options.mode == modeDuplicatesSummary ) {
+ __block std::map<std::string, int> dylibDuplicatesCount;
+ for (const auto& pos : symbolsToInstallNames) {
+ const std::vector<const char*>& paths = pos.second;
+ if ( paths.size() <= 1 )
+ continue;
+ for (const char* path : paths) {
+ dylibDuplicatesCount[path] += 1;
+ }
+ }
+ struct DupCount { const char* path; int count; };
+ std::vector<DupCount> summary;
+ for (const auto& pos : dylibDuplicatesCount) {
+ summary.push_back({pos.first.c_str(), pos.second});
+ }
+ std::sort(summary.begin(), summary.end(), [](const DupCount& l, const DupCount& r) -> bool {
+ return (l.count > r.count);
+ });
+ for ( const DupCount& entry : summary)
+ printf("% 5d %s\n", entry.count, entry.path);
+ }
+ else {
+ for (const auto& pos : symbolsToInstallNames) {
+ const std::vector<const char*>& paths = pos.second;
+ if ( paths.size() > 1 ) {
+ bool isWeakDef = (weakDefSymbols.count(pos.first) != 0);
+ printf("%s%s\n", pos.first.c_str(), (isWeakDef ? " [weak-def]" : ""));
+ for (const char* path : paths)
+ printf(" %s\n", path);
+ }
+ }
+ }
+ }
+ break;
+
+ case modeNone:
+ case modeInfo:
+ case modeTPROInfo:
+ case modeStats:
+ case modeSlideInfo:
+ case modeVerboseSlideInfo:
+ case modeFixupsInDylib:
+ case modeTextInfo:
+ case modeLocalSymbols:
+ case modeJSONMap:
+ case modeVerboseJSONMap:
+ case modeJSONDependents:
+ case modeSectionSizes:
+ case modeStrings:
+ case modeObjCInfo:
+ case modeObjCProtocols:
+ case modeObjCImpCaches:
+ case modeObjCClasses:
+ case modeObjCClassLayout:
+ case modeObjCClassMethodLists:
+ case modeObjCClassHashTable:
+ case modeObjCSelectors:
+ case modeSwiftProtocolConformances:
+ case modeSwiftPtrTables:
+ case modeExtract:
+ case modeLookupVA:
+ break;
+ }
+ }
+ return 0;
+}