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--- dyld/dyld-1340/other-tools/dyld_shared_cache_util.cpp
+++ /dev/null
@@ -1,4191 +0,0 @@
-/* -*- 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;
-}