Showcase __builtin_dump_struct

builtin_print_struct.c

//
//  clang builtin_print_struct.c && ./a.out
//
//  Created by Derek Selander
//  dyld_all_image_infos header courtsey of dyld's opensource.apple.com
//

#include <mach/mach.h>
#include <mach/task_info.h>
#include <stdio.h>
#include <stdbool.h>

struct dyld_all_image_infos {
    uint32_t                        version;        /* 1 in Mac OS X 10.4 and 10.5 */
    uint32_t                        infoArrayCount;
#if defined(__cplusplus) && (BUILDING_LIBDYLD || BUILDING_DYLD)
    std::atomic<const struct dyld_image_info*>    infoArray;
#else
    const struct dyld_image_info*    infoArray;
#endif
    void*                           notification;
    bool                            processDetachedFromSharedRegion;
    /* the following fields are only in version 2 (Mac OS X 10.6, iPhoneOS 2.0) and later */
    bool                            libSystemInitialized;
    const struct mach_header*        dyldImageLoadAddress;
    /* the following field is only in version 3 (Mac OS X 10.6, iPhoneOS 3.0) and later */
    void*                            jitInfo;
    /* the following fields are only in version 5 (Mac OS X 10.6, iPhoneOS 3.0) and later */
    const char*                        dyldVersion;
    const char*                        errorMessage;
    uintptr_t                        terminationFlags;
    /* the following field is only in version 6 (Mac OS X 10.6, iPhoneOS 3.1) and later */
    void*                            coreSymbolicationShmPage;
    /* the following field is only in version 7 (Mac OS X 10.6, iPhoneOS 3.1) and later */
    uintptr_t                        systemOrderFlag;
    /* the following field is only in version 8 (Mac OS X 10.7, iPhoneOS 3.1) and later */
    uintptr_t                        uuidArrayCount;
    const struct dyld_uuid_info*    uuidArray;        /* only images not in dyld shared cache */
    /* the following field is only in version 9 (Mac OS X 10.7, iOS 4.0) and later */
    struct dyld_all_image_infos*    dyldAllImageInfosAddress;
    /* the following field is only in version 10 (Mac OS X 10.7, iOS 4.2) and later */
    uintptr_t                        initialImageCount;
    /* the following field is only in version 11 (Mac OS X 10.7, iOS 4.2) and later */
    uintptr_t                        errorKind;
    const char*                        errorClientOfDylibPath;
    const char*                        errorTargetDylibPath;
    const char*                        errorSymbol;
    /* the following field is only in version 12 (Mac OS X 10.7, iOS 4.3) and later */
    uintptr_t                        sharedCacheSlide;
    /* the following field is only in version 13 (Mac OS X 10.9, iOS 7.0) and later */
    uint8_t                            sharedCacheUUID[16];
    /* the following field is only in version 15 (macOS 10.12, iOS 10.0) and later */
    uintptr_t                        sharedCacheBaseAddress;
    // the rest is ommitted... you get the idea
};

int main(int argc, const char * argv[]) {
    mach_msg_type_number_t count = TASK_DYLD_INFO_COUNT;
    struct dyld_all_image_infos *images = NULL;
    task_info(mach_task_self(), TASK_DYLD_INFO, (task_info_t)&images, &count);
    __builtin_dump_struct(images, &printf);
    return 0;
}