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+++ dyld/dyld-635.2/dyld3/shared-cache/make_ios_dyld_cache.cpp
@@ -0,0 +1,359 @@
+/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
+ *
+ * Copyright (c) 2016 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 <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 <algorithm>
+#include <vector>
+#include <unordered_set>
+#include <unordered_set>
+#include <iostream>
+#include <fstream>
+
+#include "MachOFile.h"
+#include "FileUtils.h"
+#include "StringUtils.h"
+#include "DyldSharedCache.h"
+
+
+
+struct MappedMachOsByCategory
+{
+ std::string archName;
+ std::vector<DyldSharedCache::MappedMachO> dylibsForCache;
+ std::vector<DyldSharedCache::MappedMachO> otherDylibsAndBundles;
+ std::vector<DyldSharedCache::MappedMachO> mainExecutables;
+};
+
+static bool verbose = false;
+
+
+static bool addIfMachO(const std::string& buildRootPath, const std::string& runtimePath, const struct stat& statBuf, dyld3::Platform platform, std::vector<MappedMachOsByCategory>& files)
+{
+ // read start of file to determine if it is mach-o or a fat file
+ std::string fullPath = buildRootPath + runtimePath;
+ int fd = ::open(fullPath.c_str(), O_RDONLY);
+ if ( fd < 0 )
+ return false;
+ bool result = false;
+ const void* wholeFile = ::mmap(NULL, (size_t)statBuf.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
+ if ( wholeFile != MAP_FAILED ) {
+ Diagnostics diag;
+ bool usedWholeFile = false;
+ for (MappedMachOsByCategory& file : files) {
+ uint64_t sliceOffset = 0;
+ uint64_t sliceLength = statBuf.st_size;
+ bool fatButMissingSlice;
+ const void* slice = MAP_FAILED;
+ const dyld3::FatFile* fh = (dyld3::FatFile*)wholeFile;
+ const dyld3::MachOFile* mh = (dyld3::MachOFile*)wholeFile;
+ if ( fh->isFatFileWithSlice(diag, statBuf.st_size, file.archName.c_str(), sliceOffset, sliceLength, fatButMissingSlice) ) {
+ slice = ::mmap(NULL, sliceLength, PROT_READ, MAP_PRIVATE, fd, sliceOffset);
+ if ( slice != MAP_FAILED ) {
+ //fprintf(stderr, "mapped slice at %p size=0x%0lX, offset=0x%0lX for %s\n", p, len, offset, fullPath.c_str());
+ mh = (dyld3::MachOFile*)slice;
+ if ( !mh->isMachO(diag, sliceLength) ) {
+ ::munmap((void*)slice, sliceLength);
+ slice = MAP_FAILED;
+ }
+ }
+ }
+ else if ( !fatButMissingSlice && mh->isMachO(diag, sliceLength) ) {
+ slice = wholeFile;
+ sliceLength = statBuf.st_size;
+ sliceOffset = 0;
+ usedWholeFile = true;
+ //fprintf(stderr, "mapped whole file at %p size=0x%0lX for %s\n", p, len, inputPath.c_str());
+ }
+ if ( slice != MAP_FAILED ) {
+ mh = (dyld3::MachOFile*)slice;
+ if ( mh->platform() != platform ) {
+ fprintf(stderr, "skipped wrong platform binary: %s\n", fullPath.c_str());
+ result = false;
+ }
+ else {
+ bool sip = true; // assume anything found in the simulator runtime is a platform binary
+ if ( mh->isDynamicExecutable() ) {
+ bool issetuid = (statBuf.st_mode & (S_ISUID|S_ISGID));
+ file.mainExecutables.emplace_back(runtimePath, mh, sliceLength, issetuid, sip, sliceOffset, statBuf.st_mtime, statBuf.st_ino);
+ }
+ else {
+ if ( parser.canBePlacedInDyldCache(runtimePath) ) {
+ file.dylibsForCache.emplace_back(runtimePath, mh, sliceLength, false, sip, sliceOffset, statBuf.st_mtime, statBuf.st_ino);
+ }
+ }
+ result = true;
+ }
+ }
+ }
+ if ( !usedWholeFile )
+ ::munmap((void*)wholeFile, statBuf.st_size);
+ }
+ ::close(fd);
+ return result;
+}
+
+
+static bool parsePathsFile(const std::string& filePath, std::vector<std::string>& paths) {
+ std::ifstream myfile( filePath );
+ if ( myfile.is_open() ) {
+ std::string line;
+ while ( std::getline(myfile, line) ) {
+ size_t pos = line.find('#');
+ if ( pos != std::string::npos )
+ line.resize(pos);
+ while ( line.size() != 0 && isspace(line.back()) ) {
+ line.pop_back();
+ }
+ if ( !line.empty() )
+ paths.push_back(line);
+ }
+ myfile.close();
+ return true;
+ }
+ return false;
+}
+
+
+static void mapAllFiles(const std::string& dylibsRootDir, const std::vector<std::string>& paths, dyld3::Platform platform, std::vector<MappedMachOsByCategory>& files)
+{
+ for (const std::string& runtimePath : paths) {
+ std::string fullPath = dylibsRootDir + runtimePath;
+ struct stat statBuf;
+ if ( (stat(fullPath.c_str(), &statBuf) != 0) || !addIfMachO(dylibsRootDir, runtimePath, statBuf, platform, files) )
+ fprintf(stderr, "could not load: %s\n", fullPath.c_str());
+ }
+}
+
+
+
+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[])
+{
+ std::string rootPath;
+ std::string dylibListFile;
+ bool force = false;
+ std::string cacheDir;
+ std::string dylibsList;
+ std::unordered_set<std::string> archStrs;
+
+ dyld3::Platform platform = dyld3::Platform::iOS;
+
+ // 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, "-tvOS") == 0) {
+ platform = dyld3::Platform::tvOS;
+ }
+ else if (strcmp(arg, "-iOS") == 0) {
+ platform = dyld3::Platform::iOS;
+ }
+ else if (strcmp(arg, "-watchOS") == 0) {
+ platform = dyld3::Platform::watchOS;
+ }
+ else if ( strcmp(arg, "-root") == 0 ) {
+ TERMINATE_IF_LAST_ARG("-root missing path argument\n");
+ rootPath = argv[++i];
+ }
+ else if ( strcmp(arg, "-dylibs_list") == 0 ) {
+ TERMINATE_IF_LAST_ARG("-dylibs_list missing path argument\n");
+ dylibsList = 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, "-arch") == 0) {
+ TERMINATE_IF_LAST_ARG("-arch missing argument\n");
+ archStrs.insert(argv[++i]);
+ }
+ else if (strcmp(arg, "-force") == 0) {
+ force = true;
+ }
+ else {
+ //usage();
+ fprintf(stderr, "update_dyld_sim_shared_cache: unknown option: %s\n", arg);
+ return 1;
+ }
+ }
+
+ if ( cacheDir.empty() ) {
+ fprintf(stderr, "missing -cache_dir <path> option to specify directory in which to write cache file(s)\n");
+ return 1;
+ }
+
+ if ( rootPath.empty() ) {
+ fprintf(stderr, "missing -runtime_dir <path> option to specify directory which is root of simulator runtime)\n");
+ return 1;
+ }
+ else {
+ // canonicalize rootPath
+ char resolvedPath[PATH_MAX];
+ if ( realpath(rootPath.c_str(), resolvedPath) != NULL ) {
+ rootPath = resolvedPath;
+ }
+ if ( rootPath.back() != '/' )
+ rootPath = rootPath + "/";
+ }
+
+ int err = mkpath_np(cacheDir.c_str(), S_IRWXU | S_IRGRP|S_IXGRP | S_IROTH|S_IXOTH);
+ if ( (err != 0) && (err != EEXIST) ) {
+ fprintf(stderr, "mkpath_np fail: %d", err);
+ return 1;
+ }
+
+ if ( archStrs.empty() ) {
+ switch ( platform ) {
+ case dyld3::Platform::iOS:
+ case dyld3::Platform::tvOS:
+ archStrs.insert("arm64");
+ break;
+ case dyld3::Platform::watchOS:
+ archStrs.insert("armv7k");
+ archStrs.insert("arm64_32");
+ break;
+ case dyld3::Platform::unknown:
+ case dyld3::Platform::macOS:
+ assert(0 && "macOS not support with this tool");
+ break;
+ }
+ }
+
+ uint64_t t1 = mach_absolute_time();
+
+ // find all mach-o files for requested architectures
+ std::vector<MappedMachOsByCategory> allFileSets;
+ if ( archStrs.count("arm64") )
+ allFileSets.push_back({"arm64"});
+ if ( archStrs.count("arm64_32") )
+ allFileSets.push_back({"arm64_32"});
+ if ( archStrs.count("armv7k") )
+ allFileSets.push_back({"armv7k"});
+ std::vector<std::string> paths;
+ parsePathsFile(dylibsList, paths);
+ mapAllFiles(rootPath, paths, platform, allFileSets);
+
+ uint64_t t2 = mach_absolute_time();
+
+ fprintf(stderr, "time to scan file system and construct lists of mach-o files: %ums\n", absolutetime_to_milliseconds(t2-t1));
+
+ // build all caches in parallel
+ __block bool cacheBuildFailure = false;
+ dispatch_apply(allFileSets.size(), dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^(size_t index) {
+ const MappedMachOsByCategory& fileSet = allFileSets[index];
+ const std::string outFile = cacheDir + "/dyld_shared_cache_" + fileSet.archName;
+
+ fprintf(stderr, "make %s cache with %lu dylibs, %lu other dylibs, %lu programs\n", fileSet.archName.c_str(), fileSet.dylibsForCache.size(), fileSet.otherDylibsAndBundles.size(), fileSet.mainExecutables.size());
+
+ // build cache new cache file
+ DyldSharedCache::CreateOptions options;
+ options.archName = fileSet.archName;
+ options.platform = platform;
+ options.excludeLocalSymbols = true;
+ options.optimizeStubs = false;
+ options.optimizeObjC = true;
+ options.codeSigningDigestMode = (platform() == dyld3::Platform::watchOS) ?
+ DyldSharedCache::Agile : DyldSharedCache::SHA256only;
+ options.dylibsRemovedDuringMastering = true;
+ options.inodesAreSameAsRuntime = false;
+ options.cacheSupportsASLR = true;
+ options.forSimulator = false;
+ options.isLocallyBuiltCache = true;
+ options.verbose = verbose;
+ options.evictLeafDylibsOnOverflow = false;
+ options.pathPrefixes = { rootPath };
+ DyldSharedCache::CreateResults results = DyldSharedCache::create(options, 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.archName.c_str(), warn.c_str());
+ }
+ if ( !results.errorMessage.empty() ) {
+ // print error (if one)
+ fprintf(stderr, "update_dyld_sim_shared_cache: %s\n", results.errorMessage.c_str());
+ cacheBuildFailure = true;
+ }
+ else {
+ // save new cache file to disk and write new .map file
+ assert(results.cacheContent != nullptr);
+ if ( !safeSave(results.cacheContent, results.cacheLength, outFile) )
+ cacheBuildFailure = true;
+ if ( !cacheBuildFailure ) {
+ std::string mapStr = results.cacheContent->mapFile();
+ std::string outFileMap = cacheDir + "/dyld_shared_cache_" + fileSet.archName + ".map";
+ safeSave(mapStr.c_str(), mapStr.size(), outFileMap);
+ }
+ // free created cache buffer
+ vm_deallocate(mach_task_self(), (vm_address_t)results.cacheContent, results.cacheLength);
+ }
+ });
+
+ // we could unmap all input files, but tool is about to quit
+
+ return (cacheBuildFailure ? 1 : 0);
+}
+