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--- /dev/null
+++ dyld/dyld-832.7.1/dyld3/ClosureWriter.cpp
@@ -0,0 +1,728 @@
+/*
+ * Copyright (c) 2017 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 <stdint.h>
+#include <assert.h>
+#include <uuid/uuid.h>
+#include <unistd.h>
+#include <limits.h>
+#include <mach/vm_page_size.h>
+
+#include "ClosureWriter.h"
+#include "MachOFile.h"
+
+
+namespace dyld3 {
+namespace closure {
+
+
+//////////////////////////// ContainerTypedBytesWriter ////////////////////////////////////////
+
+
+void ContainerTypedBytesWriter::setContainerType(TypedBytes::Type containerType)
+{
+ assert(_vmAllocationStart == 0);
+ _vmAllocationSize = 1024 * 1024;
+ vm_address_t allocationAddr;
+ ::vm_allocate(mach_task_self(), &allocationAddr, _vmAllocationSize, VM_FLAGS_ANYWHERE);
+ assert(allocationAddr != 0);
+ _vmAllocationStart = (void*)allocationAddr;
+ _containerTypedBytes = (TypedBytes*)_vmAllocationStart;
+ _containerTypedBytes->type = containerType;
+ _containerTypedBytes->payloadLength = 0;
+ _end = (uint8_t*)_vmAllocationStart + sizeof(TypedBytes);
+}
+
+void* ContainerTypedBytesWriter::append(TypedBytes::Type t, const void* payload, uint32_t payloadSize)
+{
+ assert((payloadSize & 0x3) == 0);
+ if ( (uint8_t*)_end + payloadSize >= (uint8_t*)_vmAllocationStart + _vmAllocationSize ) {
+ // if current buffer too small, grow it
+ size_t growth = _vmAllocationSize;
+ if ( growth < payloadSize )
+ growth = _vmAllocationSize*((payloadSize/_vmAllocationSize)+1);
+ vm_address_t newAllocationAddr;
+ size_t newAllocationSize = _vmAllocationSize+growth;
+ ::vm_allocate(mach_task_self(), &newAllocationAddr, newAllocationSize, VM_FLAGS_ANYWHERE);
+ assert(newAllocationAddr != 0);
+ size_t currentInUse = (char*)_end - (char*)_vmAllocationStart;
+ memcpy((void*)newAllocationAddr, _vmAllocationStart, currentInUse);
+ ::vm_deallocate(mach_task_self(), (vm_address_t)_vmAllocationStart, _vmAllocationSize);
+ _end = (void*)(newAllocationAddr + currentInUse);
+ _vmAllocationStart = (void*)newAllocationAddr;
+ _containerTypedBytes = (TypedBytes*)_vmAllocationStart;
+ _vmAllocationSize = newAllocationSize;
+ }
+ assert( (uint8_t*)_end + payloadSize < (uint8_t*)_vmAllocationStart + _vmAllocationSize);
+ TypedBytes* tb = (TypedBytes*)_end;
+ tb->type = t;
+ tb->payloadLength = payloadSize;
+ if ( payload != nullptr )
+ ::memcpy(tb->payload(), payload, payloadSize);
+ _end = (uint8_t*)_end + sizeof(TypedBytes) + payloadSize;
+ assert((_containerTypedBytes->payloadLength + sizeof(TypedBytes) + payloadSize) < (16 * 1024 * 1024));
+ _containerTypedBytes->payloadLength += sizeof(TypedBytes) + payloadSize;
+ return tb->payload();
+}
+
+const void* ContainerTypedBytesWriter::finalizeContainer()
+{
+ // trim vm allocation down to just what is needed
+ uintptr_t bufferStart = (uintptr_t)_vmAllocationStart;
+ uintptr_t used = round_page((uintptr_t)_end - bufferStart);
+ if ( used < _vmAllocationSize ) {
+ uintptr_t deallocStart = bufferStart + used;
+ ::vm_deallocate(mach_task_self(), deallocStart, _vmAllocationSize - used);
+ _end = nullptr;
+ _vmAllocationSize = used;
+ }
+ // mark vm region read-only
+ ::vm_protect(mach_task_self(), bufferStart, used, false, VM_PROT_READ);
+ return (void*)_vmAllocationStart;
+}
+
+const void* ContainerTypedBytesWriter::currentTypedBytes()
+{
+ return (void*)_vmAllocationStart;
+}
+
+void ContainerTypedBytesWriter::deallocate()
+{
+ ::vm_deallocate(mach_task_self(), (long)_vmAllocationStart, _vmAllocationSize);
+}
+
+//////////////////////////// ImageWriter ////////////////////////////////////////
+
+
+const Image* ImageWriter::finalize()
+{
+ return (Image*)finalizeContainer();
+}
+
+const Image* ImageWriter::currentImage()
+{
+ return (Image*)currentTypedBytes();
+}
+
+void ImageWriter::addPath(const char* path)
+{
+ uint32_t roundedPathLen = ((uint32_t)strlen(path) + 1 + 3) & (-4);
+ Image::PathAndHash* ph = (Image::PathAndHash*)append(TypedBytes::Type::pathWithHash, nullptr, sizeof(Image::PathAndHash)+roundedPathLen);
+ ph->hash = Image::hashFunction(path);
+ strcpy(ph->path, path);
+}
+
+Image::Flags& ImageWriter::getFlags()
+{
+ if ( _flagsOffset == -1 ) {
+ setContainerType(TypedBytes::Type::image);
+ Image::Flags flags;
+ ::bzero(&flags, sizeof(flags));
+ uint8_t* p = (uint8_t*)append(TypedBytes::Type::imageFlags, &flags, sizeof(flags));
+ _flagsOffset = (int)(p - (uint8_t*)currentTypedBytes());
+ }
+ return *((Image::Flags*)((uint8_t*)currentTypedBytes() + _flagsOffset));
+}
+
+void ImageWriter::setImageNum(ImageNum num)
+{
+ getFlags().imageNum = num;
+}
+
+void ImageWriter::setHasObjC(bool value)
+{
+ getFlags().hasObjC = value;
+}
+
+void ImageWriter::setIs64(bool value)
+{
+ getFlags().is64 = value;
+}
+
+void ImageWriter::setHasPlusLoads(bool value)
+{
+ getFlags().mayHavePlusLoads = value;
+}
+
+void ImageWriter::setIsBundle(bool value)
+{
+ getFlags().isBundle = value;
+}
+
+void ImageWriter::setIsDylib(bool value)
+{
+ getFlags().isDylib = value;
+}
+
+void ImageWriter::setIsExecutable(bool value)
+{
+ getFlags().isExecutable = value;
+}
+
+void ImageWriter::setHasWeakDefs(bool value)
+{
+ getFlags().hasWeakDefs = value;
+}
+
+void ImageWriter::setUses16KPages(bool value)
+{
+ getFlags().has16KBpages = value;
+}
+
+void ImageWriter::setOverridableDylib(bool value)
+{
+ getFlags().overridableDylib = value;
+}
+
+void ImageWriter::setInvalid()
+{
+ getFlags().isInvalid = true;
+}
+
+void ImageWriter::setInDyldCache(bool value)
+{
+ getFlags().inDyldCache = value;
+}
+
+void ImageWriter::setHasPrecomputedObjC(bool value)
+{
+ getFlags().hasPrecomputedObjC = value;
+}
+
+void ImageWriter::setNeverUnload(bool value)
+{
+ getFlags().neverUnload = value;
+}
+
+void ImageWriter::setUUID(const uuid_t uuid)
+{
+ append(TypedBytes::Type::uuid, uuid, sizeof(uuid_t));
+}
+
+void ImageWriter::addCDHash(const uint8_t cdHash[20])
+{
+ append(TypedBytes::Type::cdHash, cdHash, 20);
+}
+
+void ImageWriter::setDependents(const Array<Image::LinkedImage>& deps)
+{
+ append(TypedBytes::Type::dependents, deps.begin(), (uint32_t)deps.count()*sizeof(Image::LinkedImage));
+}
+
+void ImageWriter::setDofOffsets(const Array<uint32_t>& dofSectionOffsets)
+{
+ append(TypedBytes::Type::dofOffsets, &dofSectionOffsets[0], (uint32_t)dofSectionOffsets.count()*sizeof(uint32_t));
+}
+
+void ImageWriter::setInitOffsets(const uint32_t initOffsets[], uint32_t count)
+{
+ append(TypedBytes::Type::initOffsets, initOffsets, count*sizeof(uint32_t));
+}
+
+void ImageWriter::setTermOffsets(const uint32_t termOffsets[], uint32_t count)
+{
+ getFlags().hasTerminators = true;
+ append(TypedBytes::Type::termOffsets, termOffsets, count*sizeof(uint32_t));
+}
+
+void ImageWriter::setInitSectRange(uint32_t sectionOffset, uint32_t sectionSize)
+{
+ Image::InitializerSectionRange range = { sectionOffset, sectionSize };
+ append(TypedBytes::Type::initsSection, &range, sizeof(Image::InitializerSectionRange));
+}
+
+void ImageWriter::setDiskSegments(const Image::DiskSegment segs[], uint32_t count)
+{
+ append(TypedBytes::Type::diskSegment, segs, count*sizeof(Image::DiskSegment));
+ for (uint32_t i=0; i < count; ++i) {
+ if ( segs[i].permissions == Image::DiskSegment::kReadOnlyDataPermissions )
+ getFlags().hasReadOnlyData = true;
+ }
+}
+
+void ImageWriter::setCachedSegments(const Image::DyldCacheSegment segs[], uint32_t count)
+{
+ append(TypedBytes::Type::cacheSegment, segs, count*sizeof(Image::DyldCacheSegment));
+}
+
+void ImageWriter::setCodeSignatureLocation(uint32_t fileOffset, uint32_t size)
+{
+ Image::CodeSignatureLocation loc;
+ loc.fileOffset = fileOffset;
+ loc.fileSize = size;
+ append(TypedBytes::Type::codeSignLoc, &loc, sizeof(loc));
+}
+
+void ImageWriter::setFairPlayEncryptionRange(uint32_t fileOffset, uint32_t size)
+{
+ Image::FairPlayRange loc;
+ loc.rangeStart = fileOffset;
+ loc.rangeLength = size;
+ append(TypedBytes::Type::fairPlayLoc, &loc, sizeof(loc));
+}
+
+void ImageWriter::setMappingInfo(uint64_t sliceOffset, uint64_t vmSize)
+{
+ const uint32_t pageSize = getFlags().has16KBpages ? 0x4000 : 0x1000;
+ Image::MappingInfo info;
+ info.sliceOffsetIn4K = (uint32_t)(sliceOffset / 0x1000);
+ info.totalVmPages = (uint32_t)(vmSize / pageSize);
+ append(TypedBytes::Type::mappingInfo, &info, sizeof(info));
+}
+
+void ImageWriter::setFileInfo(uint64_t inode, uint64_t mTime)
+{
+ Image::FileInfo info = { inode, mTime };
+ append(TypedBytes::Type::fileInodeAndTime, &info, sizeof(info));
+}
+
+void ImageWriter::setRebaseInfo(const Array<Image::RebasePattern>& fixups)
+{
+ append(TypedBytes::Type::rebaseFixups, fixups.begin(), (uint32_t)fixups.count()*sizeof(Image::RebasePattern));
+}
+
+void ImageWriter::setTextRebaseInfo(const Array<Image::TextFixupPattern>& fixups)
+{
+ append(TypedBytes::Type::textFixups, fixups.begin(), (uint32_t)fixups.count()*sizeof(Image::TextFixupPattern));
+}
+
+void ImageWriter::setBindInfo(const Array<Image::BindPattern>& fixups)
+{
+ append(TypedBytes::Type::bindFixups, fixups.begin(), (uint32_t)fixups.count()*sizeof(Image::BindPattern));
+}
+
+void ImageWriter::setFixupsNotEncoded()
+{
+ getFlags().fixupsNotEncoded = true;
+}
+
+void ImageWriter::setRebasesNotEncoded()
+{
+ getFlags().rebasesNotEncoded = true;
+}
+
+void ImageWriter::setChainedFixups(uint64_t runtimeStartsStructOffset, const Array<Image::ResolvedSymbolTarget>& targets)
+{
+ getFlags().hasChainedFixups = true;
+ append(TypedBytes::Type::chainedStartsOffset, &runtimeStartsStructOffset, sizeof(uint64_t));
+ append(TypedBytes::Type::chainedFixupsTargets, targets.begin(), (uint32_t)targets.count()*sizeof(Image::ResolvedSymbolTarget));
+}
+
+void ImageWriter::setObjCFixupInfo(const Image::ResolvedSymbolTarget& objcProtocolClassTarget,
+ uint64_t objcImageInfoVMOffset,
+ const Array<Image::ProtocolISAFixup>& protocolISAFixups,
+ const Array<Image::SelectorReferenceFixup>& selRefFixups,
+ const Array<Image::ClassStableSwiftFixup>& classStableSwiftFixups,
+ const Array<Image::MethodListFixup>& methodListFixups)
+{
+ // The layout here is:
+ // ResolvedSymbolTarget
+ // uint64_t vmOffset to objc_imageinfo
+ // uint32_t protocol count
+ // uint32_t selector reference count
+ // array of ProtocolISAFixup
+ // array of SelectorReferenceFixup
+ // optional uint32_t stable swift fixup count
+ // optional uint32_t method list fixup count
+ // optional array of ClassStableSwiftFixup
+ // optional array of MethodListFixup
+
+ uint64_t headerSize = sizeof(Image::ResolvedSymbolTarget) + sizeof(uint64_t) + (sizeof(uint32_t) * 4);
+ uint64_t protocolsSize = (sizeof(Image::ProtocolISAFixup) * protocolISAFixups.count());
+ uint64_t selRefsSize = (sizeof(Image::SelectorReferenceFixup) * selRefFixups.count());
+ uint64_t stableSwiftSize = (sizeof(Image::ClassStableSwiftFixup) * classStableSwiftFixups.count());
+ uint64_t methodListSize = (sizeof(Image::MethodListFixup) * methodListFixups.count());
+
+ uint64_t totalSize = headerSize + protocolsSize + selRefsSize + stableSwiftSize + methodListSize;
+ assert( (totalSize & 3) == 0);
+ uint8_t* buffer = (uint8_t*)append(TypedBytes::Type::objcFixups, nullptr, (uint32_t)totalSize);
+
+ // Set the statically sized data
+ uint32_t protocolFixupCount = (uint32_t)protocolISAFixups.count();
+ uint32_t selRefFixupCount = (uint32_t)selRefFixups.count();
+ memcpy(buffer, &objcProtocolClassTarget, sizeof(Image::ResolvedSymbolTarget));
+ buffer += sizeof(Image::ResolvedSymbolTarget);
+ memcpy(buffer, &objcImageInfoVMOffset, sizeof(uint64_t));
+ buffer += sizeof(uint64_t);
+ memcpy(buffer, &protocolFixupCount, sizeof(uint32_t));
+ buffer += sizeof(uint32_t);
+ memcpy(buffer, &selRefFixupCount, sizeof(uint32_t));
+ buffer += sizeof(uint32_t);
+
+ // Set the protocol fixups
+ if ( protocolFixupCount != 0 ) {
+ memcpy(buffer, protocolISAFixups.begin(), (size_t)protocolsSize);
+ buffer += protocolsSize;
+ }
+
+ // Set the selector reference fixups
+ if ( selRefFixupCount != 0 ) {
+ memcpy(buffer, selRefFixups.begin(), (size_t)selRefsSize);
+ buffer += selRefsSize;
+ }
+
+ // New closures get additional fixups. These are ignored by old dyld's
+ uint32_t stableSwiftFixupCount = (uint32_t)classStableSwiftFixups.count();
+ uint32_t methodListFixupCount = (uint32_t)methodListFixups.count();
+ memcpy(buffer, &stableSwiftFixupCount, sizeof(uint32_t));
+ buffer += sizeof(uint32_t);
+ memcpy(buffer, &methodListFixupCount, sizeof(uint32_t));
+ buffer += sizeof(uint32_t);
+
+ // Set the stable swift fixups
+ if ( stableSwiftFixupCount != 0 ) {
+ memcpy(buffer, classStableSwiftFixups.begin(), (size_t)stableSwiftSize);
+ buffer += stableSwiftSize;
+ }
+
+ // Set the method list fixups
+ if ( methodListFixupCount != 0 ) {
+ memcpy(buffer, methodListFixups.begin(), (size_t)methodListSize);
+ buffer += methodListSize;
+ }
+}
+
+void ImageWriter::setAsOverrideOf(ImageNum imageNum)
+{
+ uint32_t temp = imageNum;
+ append(TypedBytes::Type::imageOverride, &temp, sizeof(temp));
+ getFlags().hasOverrideImageNum = true;
+}
+
+void ImageWriter::setInitsOrder(const ImageNum images[], uint32_t count)
+{
+ append(TypedBytes::Type::initBefores, images, count*sizeof(ImageNum));
+}
+
+
+//////////////////////////// ImageArrayWriter ////////////////////////////////////////
+
+
+ImageArrayWriter::ImageArrayWriter(ImageNum startImageNum, unsigned count, bool hasRoots) : _index(0)
+{
+ setContainerType(TypedBytes::Type::imageArray);
+ _end = (void*)((uint8_t*)_end + sizeof(ImageArray) - sizeof(TypedBytes) + sizeof(uint32_t)*count);
+ _containerTypedBytes->payloadLength = sizeof(ImageArray) - sizeof(TypedBytes) + sizeof(uint32_t)*count;
+ ImageArray* ia = (ImageArray*)_containerTypedBytes;
+ ia->firstImageNum = startImageNum;
+ ia->count = count;
+ ia->hasRoots = hasRoots;
+}
+
+void ImageArrayWriter::appendImage(const Image* image)
+{
+ ImageArray* ia = (ImageArray*)_containerTypedBytes;
+ ia->offsets[_index++] = _containerTypedBytes->payloadLength;
+ append(TypedBytes::Type::image, image->payload(), image->payloadLength);
+}
+
+const ImageArray* ImageArrayWriter::finalize()
+{
+ return (ImageArray*)finalizeContainer();
+}
+
+
+//////////////////////////// ClosureWriter ////////////////////////////////////////
+
+void ClosureWriter::setTopImageNum(ImageNum imageNum)
+{
+ append(TypedBytes::Type::topImage, &imageNum, sizeof(ImageNum));
+}
+
+void ClosureWriter::addCachePatches(const Array<Closure::PatchEntry>& patches)
+{
+ append(TypedBytes::Type::cacheOverrides, patches.begin(), (uint32_t)patches.count()*sizeof(Closure::PatchEntry));
+}
+
+void ClosureWriter::applyInterposing(const LaunchClosure* launchClosure)
+{
+ const Closure* currentClosure = (Closure*)currentTypedBytes();
+ const ImageArray* images = currentClosure->images();
+ launchClosure->forEachInterposingTuple(^(const InterposingTuple& tuple, bool&) {
+ images->forEachImage(^(const dyld3::closure::Image* image, bool&) {
+ for (const Image::BindPattern& bindPat : image->bindFixups()) {
+ if ( (bindPat.target == tuple.stockImplementation) && (tuple.newImplementation.image.imageNum != image->imageNum()) ) {
+ Image::BindPattern* writePat = const_cast<Image::BindPattern*>(&bindPat);
+ writePat->target = tuple.newImplementation;
+ }
+ }
+
+ // Chained fixups may also be interposed. We can't change elements in the chain, but we can change
+ // the target list.
+ for (const Image::ResolvedSymbolTarget& symbolTarget : image->chainedTargets()) {
+ if ( (symbolTarget == tuple.stockImplementation) && (tuple.newImplementation.image.imageNum != image->imageNum()) ) {
+ Image::ResolvedSymbolTarget* writeTarget = const_cast<Image::ResolvedSymbolTarget*>(&symbolTarget);
+ *writeTarget = tuple.newImplementation;
+ }
+ }
+ });
+ });
+}
+
+void ClosureWriter::addWarning(Closure::Warning::Type warningType, const char* warning)
+{
+ uint32_t roundedMessageLen = ((uint32_t)strlen(warning) + 1 + 3) & (-4);
+ Closure::Warning* ph = (Closure::Warning*)append(TypedBytes::Type::warning, nullptr, sizeof(Closure::Warning)+roundedMessageLen);
+ ph->type = warningType;
+ strcpy(ph->message, warning);
+}
+
+
+//////////////////////////// LaunchClosureWriter ////////////////////////////////////////
+
+LaunchClosureWriter::LaunchClosureWriter(const ImageArray* images)
+{
+ setContainerType(TypedBytes::Type::launchClosure);
+ append(TypedBytes::Type::imageArray, images->payload(), images->payloadLength);
+}
+
+const LaunchClosure* LaunchClosureWriter::finalize()
+{
+ return (LaunchClosure*)finalizeContainer();
+}
+
+void LaunchClosureWriter::setLibSystemImageNum(ImageNum imageNum)
+{
+ append(TypedBytes::Type::libSystemNum, &imageNum, sizeof(ImageNum));
+}
+
+void LaunchClosureWriter::setLibDyldEntry(Image::ResolvedSymbolTarget entry)
+{
+ append(TypedBytes::Type::libDyldEntry, &entry, sizeof(entry));
+}
+
+void LaunchClosureWriter::setMainEntry(Image::ResolvedSymbolTarget main)
+{
+ append(TypedBytes::Type::mainEntry, &main, sizeof(main));
+}
+
+void LaunchClosureWriter::setStartEntry(Image::ResolvedSymbolTarget start)
+{
+ append(TypedBytes::Type::startEntry, &start, sizeof(start));
+}
+
+void LaunchClosureWriter::setUsedFallbackPaths(bool value)
+{
+ getFlags().usedFallbackPaths = value;
+}
+
+void LaunchClosureWriter::setUsedAtPaths(bool value)
+{
+ getFlags().usedAtPaths = value;
+}
+
+void LaunchClosureWriter::setUsedInterposing(bool value)
+{
+ getFlags().usedInterposing = value;
+}
+
+void LaunchClosureWriter::setHasInsertedLibraries(bool value)
+{
+ getFlags().hasInsertedLibraries = value;
+}
+
+void LaunchClosureWriter::setInitImageCount(uint32_t count)
+{
+ getFlags().initImageCount = count;
+}
+
+LaunchClosure::Flags& LaunchClosureWriter::getFlags()
+{
+ if ( _flagsOffset == -1 ) {
+ LaunchClosure::Flags flags;
+ ::bzero(&flags, sizeof(flags));
+ uint8_t* p = (uint8_t*)append(TypedBytes::Type::closureFlags, &flags, sizeof(flags));
+ _flagsOffset = (int)(p - (uint8_t*)currentTypedBytes());
+ }
+ return *((LaunchClosure::Flags*)((uint8_t*)currentTypedBytes() + _flagsOffset));
+}
+
+void LaunchClosureWriter::setMustBeMissingFiles(const Array<const char*>& paths)
+{
+ uint32_t totalSize = 0;
+ for (const char* s : paths)
+ totalSize += (strlen(s) +1);
+ totalSize = (totalSize + 3) & (-4); // align
+
+ char* buffer = (char*)append(TypedBytes::Type::missingFiles, nullptr, totalSize);
+ char* t = buffer;
+ for (const char* path : paths) {
+ for (const char* s=path; *s != '\0'; ++s)
+ *t++ = *s;
+ *t++ = '\0';
+ }
+ while (t < &buffer[totalSize])
+ *t++ = '\0';
+}
+
+void LaunchClosureWriter::setMustExistFiles(const Array<LaunchClosure::SkippedFile>& files)
+{
+ // Start the structure with a count
+ uint32_t totalSize = sizeof(uint64_t);
+
+ // Then make space for the array of mod times and inode numbers
+ totalSize += files.count() * sizeof(uint64_t) * 2;
+
+ // Then the array of paths on the end
+ for (const LaunchClosure::SkippedFile& file : files)
+ totalSize += (strlen(file.path) + 1);
+ totalSize = (totalSize + 3) & (-4); // align
+
+ char* buffer = (char*)append(TypedBytes::Type::existingFiles, nullptr, totalSize);
+
+ // Set the size
+ uint64_t* bufferPtr = (uint64_t*)buffer;
+ *bufferPtr++ = (uint64_t)files.count();
+
+ // And the array of mod times and inode numbers
+ for (const LaunchClosure::SkippedFile& file : files) {
+ *bufferPtr++ = file.inode;
+ *bufferPtr++ = file.mtime;
+ }
+
+ char* t = (char*)bufferPtr;
+ for (const LaunchClosure::SkippedFile& file : files) {
+ for (const char* s=file.path; *s != '\0'; ++s)
+ *t++ = *s;
+ *t++ = '\0';
+ }
+ while (t < &buffer[totalSize])
+ *t++ = '\0';
+}
+
+void LaunchClosureWriter::addEnvVar(const char* envVar)
+{
+ unsigned len = (unsigned)strlen(envVar);
+ char temp[len+8];
+ strcpy(temp, envVar);
+ unsigned paddedSize = len+1;
+ while ( (paddedSize % 4) != 0 )
+ temp[paddedSize++] = '\0';
+ append(TypedBytes::Type::envVar, temp, paddedSize);
+}
+
+void LaunchClosureWriter::addInterposingTuples(const Array<InterposingTuple>& tuples)
+{
+ append(TypedBytes::Type::interposeTuples, tuples.begin(), (uint32_t)tuples.count()*sizeof(InterposingTuple));
+}
+
+void LaunchClosureWriter::setDyldCacheUUID(const uuid_t uuid)
+{
+ append(TypedBytes::Type::dyldCacheUUID, uuid, sizeof(uuid_t));
+}
+
+void LaunchClosureWriter::setHasProgramVars(uint32_t offset)
+{
+ getFlags().hasProgVars = true;
+ append(TypedBytes::Type::progVars, &offset, sizeof(uint32_t));
+}
+
+void LaunchClosureWriter::setObjCSelectorInfo(const Array<uint8_t>& hashTable, const Array<Image::ObjCSelectorImage>& hashTableImages) {
+ uint32_t count = (uint32_t)hashTableImages.count();
+ uint32_t totalSize = (uint32_t)(sizeof(count) + (sizeof(Image::ObjCSelectorImage) * count) + hashTable.count());
+ totalSize = (totalSize + 3) & (-4); // align
+ uint8_t* buffer = (uint8_t*)append(TypedBytes::Type::selectorTable, nullptr, totalSize);
+
+ // Write out out the image count
+ memcpy(buffer, &count, sizeof(count));
+ buffer += sizeof(count);
+
+ // Write out out the image nums
+ memcpy(buffer, hashTableImages.begin(), sizeof(Image::ObjCSelectorImage) * count);
+ buffer += sizeof(Image::ObjCSelectorImage) * count;
+
+ // Write out out the image count
+ memcpy(buffer, hashTable.begin(), hashTable.count());
+}
+
+void LaunchClosureWriter::setObjCClassAndProtocolInfo(const Array<uint8_t>& classHashTable, const Array<uint8_t>& protocolHashTable,
+ const Array<Image::ObjCClassImage>& hashTableImages) {
+ // The layout here is:
+ // uint32_t offset to class table (note this is 0 if there are no classes)
+ // uint32_t offset to protocol table (note this is 0 if there are no protocols)
+ // uint32_t num images
+ // ObjCClassImage[num images]
+ // class hash table
+ // [ padding to 4-byte alignment if needed
+ // protocol hash table
+ // [ padding to 4-byte alignment if needed
+
+ uint32_t numImages = (uint32_t)hashTableImages.count();
+
+ uint32_t headerSize = sizeof(uint32_t) * 3;
+ uint32_t imagesSize = (sizeof(Image::ObjCClassImage) * numImages);
+ uint32_t classTableSize = ((uint32_t)classHashTable.count() + 3) & (-4); // pad to 4-byte multiple
+ uint32_t protocolTableSize = ((uint32_t)protocolHashTable.count() + 3) & (-4); // pad to 4-byte multiple
+ uint32_t offsetToClassTable = (classTableSize == 0) ? 0 : (headerSize + imagesSize);
+ uint32_t offsetToProtocolTable = (protocolTableSize == 0) ? 0 : (headerSize + imagesSize + classTableSize);
+
+ uint32_t totalSize = headerSize + imagesSize + classTableSize + protocolTableSize;
+ assert( (totalSize & 3) == 0);
+ uint8_t* buffer = (uint8_t*)append(TypedBytes::Type::classTable, nullptr, totalSize);
+
+ // Write out out the header
+ memcpy(buffer + 0, &offsetToClassTable, sizeof(uint32_t));
+ memcpy(buffer + 4, &offsetToProtocolTable, sizeof(uint32_t));
+ memcpy(buffer + 8, &numImages, sizeof(uint32_t));
+
+ // Write out out the image nums
+ memcpy(buffer + headerSize, hashTableImages.begin(), imagesSize);
+
+ // Write out out the class hash table
+ if ( offsetToClassTable != 0 )
+ memcpy(buffer + offsetToClassTable, classHashTable.begin(), classHashTable.count());
+
+ // Write out out the protocol hash table
+ if ( offsetToProtocolTable != 0 )
+ memcpy(buffer + offsetToProtocolTable, protocolHashTable.begin(), protocolHashTable.count());
+}
+
+void LaunchClosureWriter::setObjCDuplicateClassesInfo(const Array<uint8_t>& hashTable) {
+ uint32_t totalSize = (uint32_t)hashTable.count();
+ totalSize = (totalSize + 3) & (-4); // align
+ uint8_t* buffer = (uint8_t*)append(TypedBytes::Type::duplicateClassesTable, nullptr, totalSize);
+
+ // Write out out the hash table
+ memcpy(buffer, hashTable.begin(), hashTable.count());
+}
+
+//////////////////////////// DlopenClosureWriter ////////////////////////////////////////
+
+DlopenClosureWriter::DlopenClosureWriter(const ImageArray* images)
+{
+ setContainerType(TypedBytes::Type::dlopenClosure);
+ append(TypedBytes::Type::imageArray, images->payload(), images->payloadLength);
+}
+
+const DlopenClosure* DlopenClosureWriter::finalize()
+{
+ return (DlopenClosure*)finalizeContainer();
+}
+
+
+} // namespace closure
+} // namespace dyld3
+
+
+