preface

Objc4-818.2 has been unavailable since XCode was updated to macOC Monterey. Apple has recently updated the objC4-838 source code, so it can’t wait to compile it.

The preparatory work

    1. Download objC4-838 source code
    1. Download dyLD-940 source code
    1. Download libC-1506.40.4 source code
    1. Download libC-825.40.1 source code
    1. Download libclosure-79 source code
    1. Download libplatform-273.40.1 source code
    1. Download libplatform – 220.100.1
    1. Download libpthread-485.40.4
    1. Download xNU-8019-41.5 source code

Compile environment

  • MAC 2015
  • macOC Monterey + Xcode 13

Pre-compile modification

Open objC4 project

1. Modify the script

  • Targets -> Run Script (markgc) change macosx.internal to macosx:



2. ModifyBase SDK

  • Go to Project -> Build Setting -> Base SDK and select macOS:



3. Select a compilation target



Compile and add missing libraries

  • Select Targets -> objc

  • Create a file called WSLib in the root directory of the project. Select Targets -> Build Settings -> Header Search Paths to configure the WSLib path:



  • Now compile and handle the error

1. 'sys/reason.h' file not found

  • In the BSD -> sys file of xnu-main, find reason.h and copy it. Create sys file in WSLib and paste reason.h file



  • Continue to compile

2. 'mach-o/dyld_priv.h' file not found

  • Find the dyLD_priv. h file in the directory include-> mach-o from dyld-main and copy it, then create the Mach-o file in WSLib and paste dyLD_priv. h

  • Open the dyLD_priv.h file and add the macro definition:

    #define DYLD_MACOSX_VERSION_10_11 0x000A0B00
#define DYLD_MACOSX_VERSION_10_12 0x000A0C00
#define DYLD_MACOSX_VERSION_10_13 0x000A0D00
#define DYLD_MACOSX_VERSION_10_14 0x000A0E00
Copy the code

  • Continue to compile

3. 'os/lock_private.h' file not found

  • In the downloaded source libplatform-main, private -> OS find the lock_private.h file and copy it, then create the OS file in WSLib and paste lock_private.h

  • Continue to compile

4. Expected ','An error (dyld_priv.hFile)

  • Delete the bridgeos(3.0) parameter from the file where all errors were reported with the previous, :



  • After deletion, continue compiling

5. 'os/base_private.h' file not found

  • In libplatform-220.100.1, find the base_private.h file in the private -> OS directory, copy it, and paste it into the OS file in WSLib

  • Continue to compile

6. 'pthread/tsd_private.h' file not found

  • An error is reported herelock_private.hIn the file, there are two mistakes:
    • The first thing to do is get rid of the filesBridgeos (4.0)parameter
    • Second in the downloadlibpthread-mainSource code, in the directoryprivate -> pthreadFound in thetsd_private.hAnd copy, and then inWSLibCreated in thepthreadDirectory and paste the file
  • Continue to compile

7. 'System/machine/cpu_capabilities.h' file not found

  • In xnu-main, go to osfmk -> machine and find the cpu_capabilities. H file and copy it. Then create the System file in WSLib, and then create the machine file in the System file. And paste cpu_capabilities. H

  • Continue to compile

8.'os/tsd.h' file not found

  • In the downloaded source xnu-main, find tsd.h in the directory libsyscall -> OS and copy it, then paste it in the OS file in WSLib

  • Continue to compile

9. 'pthread/spinlock_private.h' file not found

  • In the downloaded source libpthread-main, find the spinlock_private.h file in the private -> pthread directory and copy it and paste it into the pthread file in WSLib

  • Continue to compile

10. 'System/pthread_machdep.h' file not found

  • In the downloaded file libC-825.40.1, find the pthread_machdep.h file in the directory pthreads and copy it and paste it into the WSLib -> System directory

  • Continue to compile

11. 'CrashReporterClient.h' file not found

  • In the downloaded file libC-825.40.1, find the crashReporterClient.h file and copy it, then paste it into the WSLib file

    • There are two options:
        1. inCrashReporterClient.hTo add macro definitions
        #define LIBC_NO_LIBCRASHREPORTERCLIENT
Copy the code
        1. inTargets -> objc -> Build Settings -> Preprocessor Macros, addLIBC_NO_LIBCRASHREPORTERCLIENT



  • Continue to compile

12. The annotationdeclaration of 和 Typedef redefinition with

  • There are four errors reported in the pthread_machdep.h file

      1. Typedef redefinition with different types ('int' vs 'volatile OSSpinLock' (aka 'volatile int'))
      1. Static declaration of '_pthread_has_direct_tsd' follows non-static declaration
      1. Static declaration of '_pthread_getspecific_direct' follows non-static declaration
      1. Static declaration of '_pthread_setspecific_direct' follows non-static declaration

    Comment out all of these errors

  • Continue to compile

13. 'os/feature_private.h' file not found

  • Just comment it out

14. Use of undeclared identifier 'dyld_fall_2020_os_versions'

  • Comment out two lines of code that are relevant

15. Use of undeclared identifier 'objc4'

  • Comment out the relevant code



16. Use of undeclared identifier 'dyld_platform_version_macOS_10_13'

  • Comment out this code



17. Use of undeclared identifier 'dyld_platform_version_macOS_10_11'

  • Comment out relevant conditions



18. 'objc-shared-cache.h' file not found

  • In the downloaded source dyld-main, find objc-shared-cache.h in the directory include, copy it, and paste it into WSLib

  • Continue to compile

19. Use of undeclared identifier 'dyld_fall_2018_os_versions'

  • Annotation correlation condition



  • Continue to compile

20. '_simple.h' file not found

  • Download the source codelibplatform-mainIn theprivateFind the directory and copy it, then paste it intoWSLibIn the

21. 'os/linker_set.h' file not found

  • Download the source codexnu-mainIn the directorybsd -> sysFound in thelinker_set.hAnd copy toWSLibIn theosdirectory

22. 'Cambria/Traps.h' file not found

  • Comment out code

    #include <Cambria/Traps.h>
#include <Cambria/Cambria.h>
Copy the code

23. 'Block_private.h' file not found

  • Download the source codelibclosure-mainFound in theBlock_private.hAnd copy toWSLibdirectory

25. 'kern/restartable.h' file not found

  • Download the source codexnu-mainIn the directoryosfmk -> kernFound in therestartable.hFile and copy, then inWSLibCreated in thekernDirectory and pasterestartable.hfile

26. oah_is_current_process_translatedwithobjc_thread_get_ripAn error

  • Comment the condition



27. 'os/feature_private.h' file not found

  • Comment a reference to the u-turn file

28. 'os/reason_private.h' file not found

  • Download the source codexnu-mainIn the directorylibkern -> osFound in thereason_private.hFile and paste intoWSLibIn theosIn the file

29. 'os/variant_private.h' file not found

  • Locate variant_private.h in the OS directory of the downloaded source code libc-main and copy it to the OS directory in WSLib

  • In variant_private.h, delete the bridgeos parameter

30. Use of undeclared identifier 'dyld_platform_version_bridgeOS_2_0'

  • Comment out this code



31. '_static_assert' declared as an array with a negative size

  • Comment out these two lines



32. library not found for -lCrashReporterClient

  • Choose Targets -> Build Setting -> Other Linker Flags and delete -lCrashReporterClient



33. library not found for -loah

  • Go to Targets -> Build Setting -> Other Linker Flags and delete -loah



Compiled successfully 🎉🎉🎉

addTarget

  • First click the + under Targets:



  • Then select macOS -> Command Line Tool, named WSBuild



  • Add dependency library libobjc.a.dylib:





compileWSBuild(newTarget)

  • Select WSBuild first:



Fix breakpoint stalling problem

    1. inBuild PhasestheCompile Sources,main.mDrag it to the front



    1. findTargets -> Build Settings -> Enable Hardened RuntimeAnd value forNO

Once set, breakpoints are ready to go:



knownM1Computer bug fix

  • willobjc-cache.mmError code comment in:

Tips ✨

  • In the source codemacOC MontereyRunnable, lower thanmacOC MontereyThe system is availableObjc4-818.2 -Source code, need to compile.
  • Finally, a compiled Demo is attached