相关代码

相关源码

• 源码
  • github.com
    • https://github.com/opensource-apple/dyld/tree/master/launch-cache
      • https://github.com/opensource-apple/dyld/blob/master/launch-cache/dyld_shared_cache_util.cpp
      • https://github.com/opensource-apple/dyld/blob/master/launch-cache/dsc_extractor.cpp
      • https://github.com/opensource-apple/dyld/blob/master/launch-cache/dsc_iterator.cpp
  • opensource.apple.com
    • 旧：已打不开
      • https://opensource.apple.com/source/dyld/dyld-852.2/dyld3/shared-cache/
        • https://opensource.apple.com/source/dyld/dyld-852.2/dyld3/shared-cache/dyld_shared_cache_util.cpp.auto.html
        • https://opensource.apple.com/source/dyld/dyld-852.2/dyld3/shared-cache/dsc_extractor.cpp.auto.html
        • https://opensource.apple.com/source/dyld/dyld-852.2/dyld3/shared-cache/dsc_iterator.cpp.auto.html
        • https://opensource.apple.com/source/dyld/dyld-852.2/dyld3/shared-cache/dyldinfo.cpp.auto.html
        • https://opensource.apple.com/source/dyld/dyld-852.2/dyld3/shared-cache/DyldSharedCache.cpp.auto.html
      • 新
      • https://opensource.apple.com/releases/
    • -> https://github.com/apple-oss-distributions/dyld/releases/
      • 最新版本：dyld-1231.3
        • https://github.com/apple-oss-distributions/dyld/archive/refs/tags/dyld-1231.3.zip
          • 里面有各个工具的代码
            • dyld-dyld-1231.3/
              • other-tools/chroot_util.cpp
              • other-tools/dsc_extractor.cpp
              • other-tools/dsc_iterator.cpp
              • other-tools/dyld_closure_util.cpp
              • other-tools/dyld_info.cpp
              • other-tools/dyld_inspect.cpp
              • other-tools/dyld_nm.cpp
              • other-tools/dyld_shared_cache_util.cpp
              • other-tools/dyld_symbols_cache.cpp
              • other-tools/dyld_usage.cpp

相关函数

dyld_priv.h

dyld_priv.h

// Returns if any OS dylib has overridden its copy in the shared cache
//
// Exists in iPhoneOS 3.1 and later 
// Exists in Mac OS X 10.10 and later
extern bool dyld_shared_cache_some_image_overridden(void);

// Returns path used by dyld for standard dyld shared cache file for the current arch.
//
// Exists in Mac OS X 10.11 and later
extern const char* dyld_shared_cache_file_path(void);

struct dyld_shared_cache_dylib_text_info {
    uint64_t        version;        // current version 2
    // following fields all exist in version 1
    uint64_t        loadAddressUnslid;
    uint64_t        textSegmentSize; 
    uuid_t            dylibUuid;
    const char*        path;            // pointer invalid at end of iterations
    // following fields all exist in version 2
    uint64_t        textSegmentOffset;  // offset from start of cache
};
typedef struct dyld_shared_cache_dylib_text_info dyld_shared_cache_dylib_text_info;


#ifdef __BLOCKS__
// Given the UUID of a dyld shared cache file, this function will attempt to locate the cache
// file and if found iterate all images, returning info about each one.  Returns 0 on success.
//
// Exists in Mac OS X 10.11 and later
//           iOS 9.0 and later
extern int dyld_shared_cache_iterate_text(const uuid_t cacheUuid, void (^callback)(const dyld_shared_cache_dylib_text_info* info));

// Given the UUID of a dyld shared cache file, and a NULL terminated array of extra directory paths to search,
// this function will scan the standard and extra directories looking for a cache file that matches the UUID
// and if found iterate all images, returning info about each one.  Returns 0 on success.
//
// Exists in Mac OS X 10.12 and later
//           iOS 10.0 and later
extern int dyld_shared_cache_find_iterate_text(const uuid_t cacheUuid, const char* extraSearchDirs[], void (^callback)(const dyld_shared_cache_dylib_text_info* info));
#endif /* __BLOCKS */

// Gets the UUID of the dyld shared cache in the current process.
// Returns false if there is no dyld shared cache in use by the processes.
//
// Exists in Mac OS X 10.12 and later
// Exists in iOS 10.0 and later
extern bool _dyld_get_shared_cache_uuid(uuid_t uuid);

// Returns the start address of the dyld cache in the process and sets length to the size of the cache.
// Returns NULL if the process is not using a dyld shared cache
//
// Exists in Mac OS X 10.13 and later
// Exists in iOS 11.0 and later
extern const void* _dyld_get_shared_cache_range(size_t* length);

// Returns if the currently active dyld shared cache is optimized.
// Note: macOS does not use optimized caches and will always return false.
//
// Exists in Mac OS X 10.15 and later
// Exists in iOS 13.0 and later
extern bool _dyld_shared_cache_optimized(void);

// Returns if the currently active dyld shared cache was built locally.
//
// Exists in Mac OS X 10.15 and later
// Exists in iOS 13.0 and later
extern bool _dyld_shared_cache_is_locally_built(void);

// This is similar to _dyld_shared_cache_contains_path(), except that it returns the canonical
// shared cache path for the given path.
//
// Exists in macOS 10.16 and later
// Exists in iOS 14.0 and later
extern const char* _dyld_shared_cache_real_path(const char* path);