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--- dyld/dyld-941.5/cache-builder/update_dyld_sim_shared_cache.cpp
+++ /dev/null
@@ -1,695 +0,0 @@
-/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
- *
- * Copyright (c) 2018 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 <sys/types.h>
-#include <sys/stat.h>
-#include <sys/mman.h>
-#include <mach/mach.h>
-#include <mach/mach_time.h>
-#include <mach-o/dyld.h>
-#include <limits.h>
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <math.h>
-#include <fcntl.h>
-#include <dlfcn.h>
-#include <signal.h>
-#include <errno.h>
-#include <assert.h>
-#include <sys/uio.h>
-#include <unistd.h>
-#include <sys/param.h>
-#include <sys/sysctl.h>
-#include <sys/resource.h>
-#include <dirent.h>
-#include <rootless.h>
-#include <dscsym.h>
-#include <dispatch/dispatch.h>
-#include <pthread/pthread.h>
-#include <CoreFoundation/CoreFoundation.h>
-
-#include <algorithm>
-#include <vector>
-#include <unordered_set>
-#include <unordered_set>
-#include <iostream>
-#include <fstream>
-#include <sstream>
-
-#include "FileUtils.h"
-#include "StringUtils.h"
-#include "DyldSharedCache.h"
-#include "MachOFile.h"
-#include "MachOAnalyzer.h"
-#include "ClosureFileSystemPhysical.h"
-
-struct MappedMachOsByCategory
-{
- const dyld3::GradedArchs& archs;
- std::vector<DyldSharedCache::MappedMachO> dylibsForCache;
- std::vector<DyldSharedCache::MappedMachO> otherDylibsAndBundles;
- std::vector<DyldSharedCache::MappedMachO> mainExecutables;
-};
-
-static const char* sAllowedPrefixes[] = {
- "/usr",
- "/System",
-// don't look at main executables until simulator supports dyld3
-// "/bin",
-// "/sbin",
-};
-
-static const char* sDontUsePrefixes[] = {
- "/usr/share",
- "/usr/local",
-};
-
-static const char* sMacOSHostLibs[] = {
- "/usr/lib/system/libsystem_kernel.dylib",
- "/usr/lib/system/libsystem_platform.dylib",
- "/usr/lib/system/libsystem_pthread.dylib",
-};
-
-static const char* sMacOSBinaries[] = {
- "/sbin/launchd_sim_trampoline",
- "/usr/sbin/iokitsimd",
- "/usr/lib/system/host/liblaunch_sim.dylib",
-};
-
-static bool verbose = false;
-
-
-static bool addIfMachO(const dyld3::closure::FileSystem& fileSystem, const std::string& runtimePath, const struct stat& statBuf, std::vector<MappedMachOsByCategory>& files, dyld3::Platform platform, Diagnostics& diag)
-{
- // don't precompute closure info for any debug or profile dylibs
- if ( endsWith(runtimePath, "_profile.dylib") || endsWith(runtimePath, "_debug.dylib") || endsWith(runtimePath, "_asan.dylib") || endsWith(runtimePath, "_profile") || endsWith(runtimePath, "_debug") )
- return false;
- if ( startsWith(runtimePath, "/usr/lib/system/introspection/") )
- return false;
-
- bool result = false;
- for (MappedMachOsByCategory& file : files) {
- char realerPath[MAXPATHLEN];
- dyld3::closure::LoadedFileInfo loadedFileInfo = dyld3::MachOAnalyzer::load(diag, fileSystem, runtimePath.c_str(), file.archs, platform, realerPath);
- const dyld3::MachOAnalyzer* ma = (const dyld3::MachOAnalyzer*)loadedFileInfo.fileContent;
-
- if ( ma != nullptr ) {
- bool sipProtected = false;
- bool issetuid = false;
- const uint64_t sliceLen = loadedFileInfo.sliceLen;
- if ( ma->isDynamicExecutable() ) {
- #if 0 // dyld3 not enabled for simulator yet, so don't collect main executables
- issetuid = (statBuf.st_mode & (S_ISUID|S_ISGID));
- file.mainExecutables.emplace_back(runtimePath, ma, sliceLen, issetuid, sipProtected, loadedFileInfo.sliceOffset, statBuf.st_mtime, statBuf.st_ino);
- result = true;
- #endif
- }
- else if ( ma->canBePlacedInDyldCache(runtimePath.c_str(), ^(const char* msg) {
- diag.error("Dylib located at '%s' cannot be placed in cache because: '%s'", loadedFileInfo.path, msg);
- }) ) {
- file.dylibsForCache.emplace_back(runtimePath, ma, sliceLen, issetuid, sipProtected, loadedFileInfo.sliceOffset, statBuf.st_mtime, statBuf.st_ino);
- result = true;
- }
- }
- }
-
- return result;
-}
-
-static void findAllFiles(const dyld3::closure::FileSystem& fileSystem, const std::vector<std::string>& pathPrefixes, std::vector<MappedMachOsByCategory>& files, dyld3::Platform platform)
-{
- std::unordered_set<std::string> skipDirs;
- for (const char* s : sDontUsePrefixes)
- skipDirs.insert(s);
-
- __block std::unordered_set<std::string> alreadyUsed;
- bool multiplePrefixes = (pathPrefixes.size() > 1);
- for (const std::string& prefix : pathPrefixes) {
- // get all files from overlay for this search dir
- for (const char* searchDir : sAllowedPrefixes ) {
- iterateDirectoryTree(prefix, searchDir, ^(const std::string& dirPath) { return (skipDirs.count(dirPath) != 0); }, ^(const std::string& path, const struct stat& statBuf) {
- // ignore files that don't have 'x' bit set (all runnable mach-o files do)
- const bool hasXBit = ((statBuf.st_mode & S_IXOTH) == S_IXOTH);
- if ( !hasXBit && !endsWith(path, ".dylib") )
- return;
-
- // ignore files too small (must have at least a page of TEXT and LINKEDIT)
- if ( statBuf.st_size < 0x2000 )
- return;
-
- // don't add paths already found using previous prefix
- if ( multiplePrefixes && (alreadyUsed.count(path) != 0) )
- return;
-
- // don't add binaries built for the host Mac OS platform
- for (std::string s : sMacOSBinaries) {
- if (s.compare(path) == 0)
- return;
- }
- // if the file is mach-o, add to list
- Diagnostics diag;
- if ( addIfMachO(fileSystem, path, statBuf, files, platform, diag) ) {
- if ( multiplePrefixes )
- alreadyUsed.insert(path);
- }
- });
- }
- }
-}
-
-static void addMacOSHostLibs(std::vector<MappedMachOsByCategory>& allFileSets, dyld3::Platform platform)
-{
- dyld3::closure::FileSystemPhysical fileSystem;
- for (const char* path : sMacOSHostLibs) {
- struct stat statBuf;
- if ( stat(path, &statBuf) == 0 ) {
- Diagnostics diag;
- addIfMachO(fileSystem, path, statBuf, allFileSets, dyld3::Platform::macOS, diag);
- if ( diag.hasError() )
- fprintf(stderr, "update_dyld_sim_shared_cache: warning: skipping %s because %s\n", path, diag.errorMessage().c_str());
- }
- }
-}
-
-static void addMacOSBinaries(const dyld3::closure::FileSystem& fileSystem, const std::vector<std::string>& pathPrefixes, std::vector<MappedMachOsByCategory>& files)
-{
- for (const std::string& prefix : pathPrefixes) {
- for (std::string path : sMacOSBinaries) {
- std::string fullPath = prefix + path;
- struct stat statBuf;
- if ( stat(fullPath.c_str(), &statBuf) == 0 ) {
- Diagnostics diag;
- addIfMachO(fileSystem, path, statBuf, files, dyld3::Platform::macOS, diag);
- if ( diag.hasError() )
- fprintf(stderr, "update_dyld_sim_shared_cache: warning: skipping %s because %s\n", fullPath.c_str(), diag.errorMessage().c_str());
- }
- }
- }
-}
-
-static bool dontCache(const std::string& simRuntimeRootPath, const std::string& archName,
- const std::unordered_set<std::string>& pathsWithDuplicateInstallName,
- const DyldSharedCache::MappedMachO& aFile, bool warn,
- const std::unordered_set<std::string>& skipDylibs)
-{
- if ( skipDylibs.count(aFile.runtimePath) )
- return true;
- if ( startsWith(aFile.runtimePath, "/usr/lib/system/introspection/") )
- return true;
- if ( startsWith(aFile.runtimePath, "/usr/local/") )
- return true;
-
- // anything inside a .app bundle is specific to app, so should not be in shared cache
- if ( aFile.runtimePath.find(".app/") != std::string::npos )
- return true;
-
- if ( aFile.runtimePath.find("//") != std::string::npos ) {
- if (warn) fprintf(stderr, "update_dyld_sim_shared_cache: warning: %s use of bad install name %s\n", archName.c_str(), aFile.runtimePath.c_str());
- return true;
- }
-
- const char* installName = aFile.mh->installName();
- if ( (pathsWithDuplicateInstallName.count(aFile.runtimePath) != 0) && (aFile.runtimePath != installName) ) {
- // <rdar://problem/46431467> if a dylib moves and a symlink is installed into its place, bom iterator will see both and issue a warning
- struct stat statBuf;
- bool isSymLink = ( (lstat(aFile.runtimePath.c_str(), &statBuf) == 0) && S_ISLNK(statBuf.st_mode) );
- if (!isSymLink && warn) fprintf(stderr, "update_dyld_sim_shared_cache: warning: %s skipping because of duplicate install name %s\n", archName.c_str(), aFile.runtimePath.c_str());
- return true;
- }
-
- if ( aFile.runtimePath != installName ) {
- // see if install name is a symlink to actual path
- std::string fullInstall = simRuntimeRootPath + installName;
- char resolvedPath[PATH_MAX];
- if ( realpath(fullInstall.c_str(), resolvedPath) != NULL ) {
- std::string resolvedSymlink = resolvedPath;
- if ( !simRuntimeRootPath.empty() ) {
- resolvedSymlink = resolvedSymlink.substr(simRuntimeRootPath.size());
- }
- if ( aFile.runtimePath == resolvedSymlink ) {
- return false;
- }
- }
- // <rdar://problem/38000411> also if runtime path is a symlink to install name
- std::string fullRuntime = simRuntimeRootPath + aFile.runtimePath;
- if ( realpath(fullRuntime.c_str(), resolvedPath) != NULL ) {
- std::string resolvedSymlink = resolvedPath;
- if ( !simRuntimeRootPath.empty() ) {
- resolvedSymlink = resolvedSymlink.substr(simRuntimeRootPath.size());
- }
- if ( resolvedSymlink == installName ) {
- return false;
- }
- }
- if (warn) fprintf(stderr, "update_dyld_sim_shared_cache: warning: %s skipping because of bad install name %s\n", archName.c_str(), aFile.runtimePath.c_str());
- return true;
- }
- return false;
-}
-
-static void pruneCachedDylibs(const std::string& volumePrefix, const std::unordered_set<std::string>& skipDylibs, MappedMachOsByCategory& fileSet)
-{
- std::unordered_set<std::string> pathsWithDuplicateInstallName;
-
- std::unordered_map<std::string, std::string> installNameToFirstPath;
- for (DyldSharedCache::MappedMachO& aFile : fileSet.dylibsForCache) {
- const char* installName = aFile.mh->installName();
- auto pos = installNameToFirstPath.find(installName);
- if ( pos == installNameToFirstPath.end() ) {
- installNameToFirstPath[installName] = aFile.runtimePath;
- }
- else {
- pathsWithDuplicateInstallName.insert(aFile.runtimePath);
- pathsWithDuplicateInstallName.insert(installNameToFirstPath[installName]);
- }
- }
-
- for (DyldSharedCache::MappedMachO& aFile : fileSet.dylibsForCache) {
- if ( dontCache(volumePrefix, fileSet.archs.name(), pathsWithDuplicateInstallName, aFile, true, skipDylibs) ){
- // <rdar://problem/46423929> don't build dlopen closures for symlinks to something in the dyld cache
- if ( pathsWithDuplicateInstallName.count(aFile.runtimePath) == 0 )
- fileSet.otherDylibsAndBundles.push_back(aFile);
- }
- }
- fileSet.dylibsForCache.erase(std::remove_if(fileSet.dylibsForCache.begin(), fileSet.dylibsForCache.end(),
- [&](const DyldSharedCache::MappedMachO& aFile) { return dontCache(volumePrefix, fileSet.archs.name(), pathsWithDuplicateInstallName, aFile, false, skipDylibs); }),
- fileSet.dylibsForCache.end());
-}
-
-static void pruneOtherDylibs(const std::string& volumePrefix, MappedMachOsByCategory& fileSet)
-{
- // other OS dylibs should not contain dylibs that are embedded in some .app bundle
- fileSet.otherDylibsAndBundles.erase(std::remove_if(fileSet.otherDylibsAndBundles.begin(), fileSet.otherDylibsAndBundles.end(),
- [&](const DyldSharedCache::MappedMachO& aFile) { return (aFile.runtimePath.find(".app/") != std::string::npos); }),
- fileSet.otherDylibsAndBundles.end());
-}
-
-
-static std::string getOrderFileContent(const std::string& orderFile)
-{
- std::ifstream fstream(orderFile);
- std::stringstream stringBuf;
- stringBuf << fstream.rdbuf();
- return stringBuf.str();
-}
-
-static bool existingCacheUpToDate(const std::string& existingCache, const std::vector<DyldSharedCache::MappedMachO>& currentDylibs)
-{
- // if no existing cache, it is not up-to-date
- int fd = ::open(existingCache.c_str(), O_RDONLY);
- if ( fd < 0 )
- return false;
- struct stat statbuf;
- if ( ::fstat(fd, &statbuf) == -1 ) {
- ::close(fd);
- return false;
- }
-
- // build map of found dylibs
- std::unordered_map<std::string, const DyldSharedCache::MappedMachO*> currentDylibMap;
- for (const DyldSharedCache::MappedMachO& aFile : currentDylibs) {
- //fprintf(stderr, "0x%0llX 0x%0llX %s\n", aFile.inode, aFile.modTime, aFile.runtimePath.c_str());
- currentDylibMap[aFile.runtimePath] = &aFile;
- }
-
- // make sure all dylibs in existing cache have same mtime and inode as found dylib
- __block bool foundMismatch = false;
- const uint64_t cacheMapLen = statbuf.st_size;
- void *p = ::mmap(NULL, cacheMapLen, PROT_READ, MAP_PRIVATE, fd, 0);
- if ( p != MAP_FAILED ) {
- const DyldSharedCache* cache = (DyldSharedCache*)p;
- cache->forEachImageEntry(^(const char* installName, uint64_t mTime, uint64_t inode) {
- bool foundMatch = false;
- auto pos = currentDylibMap.find(installName);
- if ( pos != currentDylibMap.end() ) {
- const DyldSharedCache::MappedMachO* foundDylib = pos->second;
- if ( (foundDylib->inode == inode) && (foundDylib->modTime == mTime) ) {
- foundMatch = true;
- }
- }
- if ( !foundMatch ) {
- // use slow path and look for any dylib with a matching inode and mtime
- bool foundSlow = false;
- for (const DyldSharedCache::MappedMachO& aFile : currentDylibs) {
- if ( (aFile.inode == inode) && (aFile.modTime == mTime) ) {
- foundSlow = true;
- break;
- }
- }
- if ( !foundSlow ) {
- foundMismatch = true;
- if ( verbose )
- fprintf(stderr, "rebuilding dyld cache because dylib changed: %s\n", installName);
- }
- }
- });
- ::munmap(p, cacheMapLen);
- }
-
- ::close(fd);
-
- return !foundMismatch;
-}
-
-static void addFileSets(const std::unordered_set<std::string>& allowedArchs, std::unordered_set<std::string>& requestedArchs, std::vector<MappedMachOsByCategory>& fileSets)
-{
- if ( requestedArchs.empty() ) {
-#if __arm64__
- requestedArchs.insert("arm64");
-#elif __x86_64__
- requestedArchs.insert("x86_64");
-#else
- #error unknown platform
-#endif
- }
-
- for (auto& requested : requestedArchs) {
- if ( allowedArchs.find(requested) != allowedArchs.end() ) {
- const dyld3::GradedArchs& archs = dyld3::GradedArchs::forName(requested.c_str(), false);
- fileSets.push_back({archs});
- }
- }
-}
-
-inline uint32_t absolutetime_to_milliseconds(uint64_t abstime)
-{
- return (uint32_t)(abstime/1000/1000);
-}
-
-
-#define TERMINATE_IF_LAST_ARG( s ) \
- do { \
- if ( i == argc - 1 ) { \
- fprintf(stderr, s ); \
- return 1; \
- } \
- } while ( 0 )
-
-int main(int argc, const char* argv[], const char* envp[])
-{
- std::string rootPath;
- bool force = false;
- bool dylibsRemoved = false;
- std::string cacheDir;
- std::string dylibOrderFile;
- std::string dirtyDataOrderFile;
- dyld3::Platform platform = dyld3::Platform::iOS_simulator;
- std::unordered_set<std::string> skipDylibs;
- std::unordered_set<std::string> requestedArchs;
-
- // parse command line options
- for (int i = 1; i < argc; ++i) {
- const char* arg = argv[i];
- if (strcmp(arg, "-debug") == 0) {
- verbose = true;
- }
- else if (strcmp(arg, "-verbose") == 0) {
- verbose = true;
- }
- else if ((strcmp(arg, "-root") == 0) || (strcmp(arg, "--root") == 0)) {
- TERMINATE_IF_LAST_ARG("-root missing path argument\n");
- rootPath = argv[++i];
- }
- else if (strcmp(arg, "-cache_dir") == 0) {
- TERMINATE_IF_LAST_ARG("-cache_dir missing path argument\n");
- cacheDir = argv[++i];
- }
- else if (strcmp(arg, "-iOS") == 0) {
- platform = dyld3::Platform::iOS_simulator;
- }
- else if (strcmp(arg, "-watchOS") == 0) {
- platform = dyld3::Platform::watchOS_simulator;
- }
- else if (strcmp(arg, "-tvOS") == 0) {
- platform = dyld3::Platform::tvOS_simulator;
- }
- else if (strcmp(arg, "-dylibs_removed_in_mastering") == 0) {
- dylibsRemoved = true;
- }
- else if (strcmp(arg, "-dylib_order_file") == 0) {
- TERMINATE_IF_LAST_ARG("-dylib_order_file missing path argument\n");
- dylibOrderFile = argv[++i];
- }
- else if (strcmp(arg, "-dirty_data_order_file") == 0) {
- TERMINATE_IF_LAST_ARG("-dirty_data_order_file missing path argument\n");
- dirtyDataOrderFile = argv[++i];
- }
- else if (strcmp(arg, "-arch") == 0) {
- TERMINATE_IF_LAST_ARG("-arch missing arch argument\n");
- requestedArchs.insert(argv[++i]);
- }
- else if (strcmp(arg, "-force") == 0) {
- force = true;
- }
- else if (strcmp(arg, "-skip") == 0) {
- TERMINATE_IF_LAST_ARG("-skip missing argument\n");
- skipDylibs.insert(argv[++i]);
- }
- else {
- //usage();
- fprintf(stderr, "update_dyld_sim_shared_cache: unknown option: %s\n", arg);
- return 1;
- }
- }
-
- if ( rootPath.empty() ) {
- fprintf(stderr, "-root should be specified\n");
- return 1;
- }
- if ( cacheDir.empty() ) {
- fprintf(stderr, "-cache_dir should be specified\n");
- return 1;
- }
- // canonicalize rootPath
- char resolvedPath[PATH_MAX];
- if ( realpath(rootPath.c_str(), resolvedPath) != NULL ) {
- rootPath = resolvedPath;
- }
-
- // canonicalize cacheDir.
- // Later, path is checked against real path name before writing cache file to avoid TOCTU race condition.
- if ( realpath(cacheDir.c_str(), resolvedPath) != NULL ) {
- cacheDir = resolvedPath;
- }
-
- // Find the boot volume so that we can ensure all overlays are on the same volume
- struct stat rootStatBuf;
- if ( stat(rootPath.c_str(), &rootStatBuf) != 0 ) {
- fprintf(stderr, "update_dyld_sim_shared_cache: error: could not stat root file system because '%s'\n", strerror(errno));
- return 1;
- }
-
- std::vector<std::string> pathPrefixes;
-
- pathPrefixes.push_back(rootPath);
-
- // build FileSystem object
- const char* fsRoot = rootPath.empty() ? nullptr : rootPath.c_str();
- dyld3::closure::FileSystemPhysical fileSystem(fsRoot, nullptr);
-
-
- int err = mkpath_np(cacheDir.c_str(), S_IRWXU | S_IRGRP|S_IXGRP | S_IROTH|S_IXOTH);
- if ( (err != 0) && (err != EEXIST) ) {
- fprintf(stderr, "update_dyld_sim_shared_cache: could not access cache dir: mkpath_np(%s) failed errno=%d\n", cacheDir.c_str(), err);
- return 1;
- }
-
- std::string dylibOrderFileContent;
- if ( !dylibOrderFile.empty() ) {
- dylibOrderFileContent = getOrderFileContent(dylibOrderFile);
- }
-
- std::string dirtyDataOrderFileContent;
- if ( !dirtyDataOrderFile.empty() ) {
- dirtyDataOrderFileContent = getOrderFileContent(dirtyDataOrderFile);
- }
- uint64_t t1 = mach_absolute_time();
-
- __block std::vector<MappedMachOsByCategory> allFileSets;
- std::unordered_set<std::string> allowedArchs;
- switch ( platform ) {
- case dyld3::Platform::iOS_simulator:
- allowedArchs.insert("x86_64");
- allowedArchs.insert("arm64");
- break;
- case dyld3::Platform::watchOS_simulator:
- allowedArchs.insert("x86_64");
- allowedArchs.insert("arm64");
-
- break;
- case dyld3::Platform::tvOS_simulator:
- allowedArchs.insert("x86_64");
- allowedArchs.insert("arm64");
- break;
- default:
- assert(0 && "invalid platform");
- break;
- }
-
- addFileSets(allowedArchs, requestedArchs, allFileSets);
- if ( allFileSets.empty() ) {
- fprintf(stderr, "update_dyld_sim_shared_cache: error: no valid architecture specified\n");
- return 1;
- }
-
- findAllFiles(fileSystem, pathPrefixes, allFileSets, platform);
- addMacOSHostLibs(allFileSets, platform);
- addMacOSBinaries(fileSystem, pathPrefixes, allFileSets);
-
- // nothing in OS uses i386 dylibs, so only dylibs used by third party apps need to be in cache
- for (MappedMachOsByCategory& fileSet : allFileSets) {
- pruneCachedDylibs(rootPath, skipDylibs, fileSet);
- pruneOtherDylibs(rootPath, fileSet);
- }
-
- uint64_t t2 = mach_absolute_time();
- if ( verbose ) {
- fprintf(stderr, "time to scan file system and construct lists of mach-o files: %ums\n", absolutetime_to_milliseconds(t2-t1));
- }
-
- // build caches in parallel on machines with at leat 4GB of RAM
- uint64_t memSize = 0;
- size_t sz = sizeof(memSize);
- bool buildInParallel = false;
- if ( sysctlbyname("hw.memsize", &memSize, &sz, NULL, 0) == 0 ) {
- if ( memSize >= 0x100000000ULL )
- buildInParallel = true;
- }
- dispatch_queue_t dqueue = buildInParallel ? dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)
- : dispatch_queue_create("serial-queue", DISPATCH_QUEUE_SERIAL);
-
- // build all caches
- __block bool cacheBuildFailure = false;
- __block bool wroteSomeCacheFile = false;
- dispatch_apply(allFileSets.size(), dqueue, ^(size_t index) {
- MappedMachOsByCategory& fileSet = allFileSets[index];
- const std::string outFile = cacheDir + "/dyld_sim_shared_cache_" + fileSet.archs.name();
-
- DyldSharedCache::MappedMachO (^loader)(const std::string&, Diagnostics&) = ^DyldSharedCache::MappedMachO(const std::string& runtimePath, Diagnostics& diag) {
- if ( skipDylibs.count(runtimePath) )
- return DyldSharedCache::MappedMachO();
-
- for (const std::string& prefix : pathPrefixes) {
- std::string fullPath = prefix + runtimePath;
- struct stat statBuf;
- if ( stat(fullPath.c_str(), &statBuf) == 0 ) {
- char truePath[PATH_MAX];
- if ( realpath(fullPath.c_str(), truePath) != NULL ) {
- std::string resolvedSymlink = truePath;
- if ( !rootPath.empty() ) {
- resolvedSymlink = resolvedSymlink.substr(rootPath.size());
- }
- if ( (runtimePath != resolvedSymlink) && !contains(runtimePath, "InputContext") ) { //HACK remove InputContext when fixed
- // path requested is a symlink path, check if real path already loaded
- for (const DyldSharedCache::MappedMachO& aDylibMapping : fileSet.dylibsForCache) {
- if ( aDylibMapping.runtimePath == resolvedSymlink ) {
- if ( verbose )
- fprintf(stderr, "verifySelfContained, redirect %s to %s\n", runtimePath.c_str(), aDylibMapping.runtimePath.c_str());
- return aDylibMapping;
- }
- }
- }
- }
-
- std::vector<MappedMachOsByCategory> mappedFiles;
- mappedFiles.push_back({fileSet.archs});
- if ( addIfMachO(fileSystem, runtimePath, statBuf, mappedFiles, platform, diag) ) {
- if ( !mappedFiles.back().dylibsForCache.empty() ) {
- if ( verbose )
- fprintf(stderr, "verifySelfContained, add %s\n", mappedFiles.back().dylibsForCache.back().runtimePath.c_str());
- return mappedFiles.back().dylibsForCache.back();
- }
- }
- }
- }
- return DyldSharedCache::MappedMachO();
- };
- size_t startCount = fileSet.dylibsForCache.size();
- std::vector<std::pair<DyldSharedCache::MappedMachO, std::set<std::string>>> excludes;
- std::unordered_set<std::string> badZippered;
- DyldSharedCache::verifySelfContained(fileSet.dylibsForCache, badZippered, loader, excludes);
- for (size_t i=startCount; i < fileSet.dylibsForCache.size(); ++i) {
- fprintf(stderr, "update_dyld_sim_shared_cache: warning: %s not in initial scan, but adding required dylib %s\n", fileSet.archs.name(), fileSet.dylibsForCache[i].runtimePath.c_str());
- }
- for (auto& exclude : excludes) {
- std::string reasons = "(\"";
- for (auto i = exclude.second.begin(); i != exclude.second.end(); ++i) {
- reasons += *i;
- if (i != --exclude.second.end()) {
- reasons += "\", \"";
- }
- }
- reasons += "\")";
- fprintf(stderr, "update_dyld_sim_shared_cache: warning: %s rejected from cached dylibs: %s (%s)\n", fileSet.archs.name(), exclude.first.runtimePath.c_str(), reasons.c_str());
- fileSet.otherDylibsAndBundles.push_back(exclude.first);
- }
-
- // check if cache is already up to date
- if ( !force ) {
- if ( existingCacheUpToDate(outFile, fileSet.dylibsForCache) )
- return;
- }
-
-
- // build cache new cache file
- DyldSharedCache::CreateOptions options;
- options.outputFilePath = outFile;
- options.outputMapFilePath = cacheDir + "/dyld_sim_shared_cache_" + fileSet.archs.name() + ".map";
- options.archs = &fileSet.archs;
- options.platform = platform;
- options.localSymbolMode = DyldSharedCache::LocalSymbolsMode::keep;
- options.optimizeStubs = false;
- options.optimizeDyldDlopens = false; // don't add dyld3 closures to simulator cache
- options.optimizeDyldLaunches = false; // don't add dyld3 closures to simulator cache
- options.codeSigningDigestMode = DyldSharedCache::SHA256only;
- options.dylibsRemovedDuringMastering = dylibsRemoved;
- options.inodesAreSameAsRuntime = true;
- options.cacheSupportsASLR = false;
- options.forSimulator = true;
- options.isLocallyBuiltCache = true;
- options.verbose = verbose;
- options.evictLeafDylibsOnOverflow = true;
- options.dylibOrdering = parseOrderFile(dylibOrderFileContent);
- options.dirtyDataSegmentOrdering = parseOrderFile(dirtyDataOrderFileContent);
- DyldSharedCache::CreateResults results = DyldSharedCache::create(options, fileSystem, fileSet.dylibsForCache, fileSet.otherDylibsAndBundles, fileSet.mainExecutables);
-
- // print any warnings
- for (const std::string& warn : results.warnings) {
- fprintf(stderr, "update_dyld_sim_shared_cache: warning: %s %s\n", fileSet.archs.name(), warn.c_str());
- }
- if ( results.errorMessage.empty() ) {
- wroteSomeCacheFile = true;
- }
- else {
- fprintf(stderr, "update_dyld_sim_shared_cache: %s\n", results.errorMessage.c_str());
- cacheBuildFailure = true;
- }
- });
-
- // we could unmap all input files, but tool is about to quit
-
- return (cacheBuildFailure ? 1 : 0);
-}
-