How to set debug point

Question

How to set debug point

wsdwsd0829 opened this issue 4 years ago · comments

Max Wang commented 4 years ago

When I run debug-objc binary e.g. id obj = [[NSObject alloc] init];

the debug point +alloc is not triggering in NSObject.mm
Mac version:10.14.6 Xcode: Version 11.3.1

Do you know why and how I can fix it? Thanks.

RetVal · Answer 1 · Fri Mar 27 2020 11:54:18 GMT+0800 (China Standard Time)

add the breakpoint to function objc_alloc ? have a try.

Max Wang · Answer 2 · Fri Mar 27 2020 14:09:40 GMT+0800 (China Standard Time)

I tried that and not working. The only change i made is to change signing's Team and use "Automatically manage signing" and change target of debug-objc's min target version to 10.14 to match mine.

What's your tested os & xcode version? Maybe I need to update xcode and os?

Max Wang · Answer 3 · Sat Mar 28 2020 08:55:17 GMT+0800 (China Standard Time)

Unfortunately updating to Catalina did not fix it either.

RetVal · Answer 4 · Sat Mar 28 2020 18:45:11 GMT+0800 (China Standard Time)

OSX 10.15.3, Xcode 11.4
I think maybe you can running the demo project, and set a breakpoint to pause the process, type 'image list' to the console and check the path of the runtime.

Max Wang · Answer 5 · Sun Mar 29 2020 02:16:00 GMT+0800 (China Standard Time)

This is the output:
(lldb) image list
[ 0] F2AC94E8-A1C2-30F5-8727-84D92AD89951 0x0000000100000000 /Users/maxwang/Library/Developer/Xcode/DerivedData/objc-dnbfetcywolbragldaprohldvehz/Build/Products/Debug/debug-objc
[ 1] 1F893B81-89A5-3502-8510-95B97B9F730D 0x0000000100009000 /usr/lib/dyld
[ 2] 20AC082F-2DB7-3974-A2D4-8C5E01787584 0x00007fff6e517000 /usr/lib/libobjc.A.dylib
[ 3] 9A74FA97-7F7B-3929-B381-D9514B1E4754 0x00007fff37dbc000 /System/Library/Frameworks/Foundation.framework/Versions/C/Foundation
[ 4] DB8310F1-272D-3533-A840-3B390AF55C26 0x00007fff6c6b7000 /usr/lib/libSystem.B.dylib
[ 5] 9E632A1E-9622-33D6-BCCE-23AC16DAA6B7 0x00007fff35706000 /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
[ 6] 1C880020-396D-3F91-BE27-5A09A9239F68 0x00007fff6c9f0000 /usr/lib/libc++abi.dylib
[ 7] 08199809-33CA-321E-9B9D-FD5B2BC64580 0x00007fff6c99d000 /usr/lib/libc++.1.dylib
[ 8] 5F90FFCE-403B-3724-991D-BA32401D99C5 0x00007fff6f4b3000 /usr/lib/system/libcache.dylib
[ 9] C7A5E3F7-1E5A-3785-875A-B6647082B614 0x00007fff6f4b9000 /usr/lib/system/libcommonCrypto.dylib
[ 10] A517E149-2D25-3C04-BCEF-F69149C85B18 0x00007fff6f4c5000 /usr/lib/system/libcompiler_rt.dylib

RetVal · Answer 6 · Sun Mar 29 2020 14:27:12 GMT+0800 (China Standard Time)

the path of the runtime told that your app loaded the system version of the binary, so the breakpoint didn't make sense, check the snapshot of my screen, you can see the demo loaded the binary which was compiled from the project.

maybe you can check the build location of the runtime and your demo app, make sure the location of these two was same.

Nathan Lanza · Answer 7 · Mon Mar 30 2020 14:30:17 GMT+0800 (China Standard Time)

How are you doing this? The debug-objc binary has LC 13: LC_LOAD_DYLIB /usr/lib/libobjc.A.dylib. Are you manually install_name_tooling this to a relative path? I had to use DYLD_INSERT_LIBRARIES=path/to/built/libobjc.A.dylib. Not even sure why that worked given the load command is for the absolute path libobjc.A.dylib.

Max Wang · Answer 8 · Tue Mar 31 2020 05:52:22 GMT+0800 (China Standard Time)

I could not find install_name_tool or DYLD_INSERT_LIBRARIES in Build Setting of debug-objc or objc target.
I did not change any settings after git clone. Shouldn't it be setting the build use the debug build of runtime when I just clone the project (I just cloned without changing anything, except cert/signing)?
What setting do you suggest I can check and try to change. I am not really familiar with which path is related to point to the right objc dylib.

Nathan Lanza · Answer 9 · Tue Mar 31 2020 05:55:09 GMT+0800 (China Standard Time)

I don’t know how to use Xcode.

I just did
‘’’
DYLD_INSERT_LIBRARIES=path/to/libobjc.A.dylib lldb path/to/debug-objc
‘’’

RetVal · Answer 10 · Wed Apr 01 2020 20:05:00 GMT+0800 (China Standard Time)

I don’t know how to use Xcode.

I just did
‘’’
DYLD_INSERT_LIBRARIES=path/to/libobjc.A.dylib lldb path/to/debug-objc
‘’’

maybe you can check the build location of the runtime and your demo app, make sure the location of these two was same.

Max Wang · Answer 11 · Thu Apr 02 2020 00:29:23 GMT+0800 (China Standard Time)

They are the same both pointing to "build" path. [image: image.png] [image: image.png]

…

On Wed, Apr 1, 2020 at 5:05 AM RetVal ***@***.***> wrote: I don’t know how to use Xcode. I just did ‘’’ DYLD_INSERT_LIBRARIES=path/to/libobjc.A.dylib lldb path/to/debug-objc ‘’’ maybe you can check the build location of the runtime and your demo app, make sure the location of these two was same. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#20 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABIWVZEYWZGYZ7JKVRUBJSDRKMUXVANCNFSM4LSEBUYA> .

haozi · Answer 12 · Sat Apr 04 2020 12:48:22 GMT+0800 (China Standard Time)

They are the same both pointing to "build" path. [image: image.png] [image: image.png]
…
On Wed, Apr 1, 2020 at 5:05 AM RetVal @.***> wrote: I don’t know how to use Xcode. I just did ‘’’ DYLD_INSERT_LIBRARIES=path/to/libobjc.A.dylib lldb path/to/debug-objc ‘’’ maybe you can check the build location of the runtime and your demo app, make sure the location of these two was same. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#20 (comment)>, or unsubscribe https://github.com/notifications/unsubscribe-auth/ABIWVZEYWZGYZ7JKVRUBJSDRKMUXVANCNFSM4LSEBUYA .

I have the same problem, try everything i can do but none of them worked, so I give up the newest version，and try compile 756.2 which Git commit is 20d965f，and it worked！hope it can help

Nathan Lanza · Answer 13 · Sun Apr 05 2020 03:22:35 GMT+0800 (China Standard Time)

ld64 links against the dylibs install path. For the built libobjc.A.dylib this is /usr/lib/libobjc.A.dylib as set by the Installation Directory value of /usr/lib in Xcode. So ld64 will put that as the LD_LOAD_DYLIB for anything you link against the built library. However, Xcode also injects -frameword Foundation into the main.o objectfile as an LC_LINKER_OPTION which implicitly imports /usr/lib/libobjc.A.dylib. So the workaround for this whole thing seems ridiculous. I'd just stick to DYLD_INSERT_LIBRARIES=build/Debug/libobjc.A.dylib lldb debug-objc.

Max Wang · Answer 14 · Sun Apr 05 2020 05:44:01 GMT+0800 (China Standard Time)

ba21fe7 this commit worked for me on Mojave and Catalina. (756.2 20d965f did not).

Thanks @programingHaozi for the idea to try other commits.

RetVal · Answer 15 · Tue Apr 07 2020 14:43:07 GMT+0800 (China Standard Time)

Maybe you can check the SIP status of your machine, typing csrutil status in your terminal, please make sure the status was disabled. I tested this using an empty machine and couldn't load the custom version of the runtime when the SIP was enabled, hope it make sense.

haozi · Answer 16 · Wed Apr 08 2020 11:19:16 GMT+0800 (China Standard Time)

Maybe you can check the SIP status of your machine, typing csrutil status in your terminal, please make sure the status was disabled. I tested this using an empty machine and couldn't load the custom version of the runtime when the SIP was enabled, hope it make sense.

After I set SIP disabled and compile, compile 799.1 an error occurred

dyld: lazy symbol binding failed: Symbol not found: _task_restartable_ranges_register
Referenced from: /Users/XXX/Library/Developer/Xcode/DerivedData/objc-durwwovfolhlzvbslduvjahbhifr/Build/Products/Debug/libobjc.A.dylib
Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: _task_restartable_ranges_register
Referenced from: /Users/XXX/Library/Developer/Xcode/DerivedData/objc-durwwovfolhlzvbslduvjahbhifr/Build/Products/Debug/libobjc.A.dylib
Expected in: /usr/lib/libSystem.B.dylib

and commit 20d965f compile successed which failed when SIP was enabled

by the way ,can I debug on iOS platform？

Nathan Lanza · Answer 17 · Fri Apr 10 2020 00:18:59 GMT+0800 (China Standard Time)

_task_restartable_ranges_register

is a new macOS 10.15 symbol. I'm guessing you just need to update your OS + Xcode.

RetVal · Answer 18 · Tue Apr 14 2020 20:32:07 GMT+0800 (China Standard Time)

Maybe you can check the SIP status of your machine, typing csrutil status in your terminal, please make sure the status was disabled. I tested this using an empty machine and couldn't load the custom version of the runtime when the SIP was enabled, hope it make sense.

@wsdwsd0829 any update?

Max Wang · Answer 19 · Wed Apr 15 2020 01:07:09 GMT+0800 (China Standard Time)

I am good with a previous commit for now. Did not want to disable this: csrutil status Thanks.

…

On Tue, Apr 14, 2020 at 5:32 AM RetVal ***@***.***> wrote: Maybe you can check the SIP status of your machine, typing csrutil status in your terminal, please make sure the status was disabled. I tested this using an empty machine and couldn't load the custom version of the runtime when the SIP was enabled, hope it make sense. @wsdwsd0829 <https://github.com/wsdwsd0829> any update? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#20 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABIWVZH3GN4AJSGIVLX6GFDRMRJVPANCNFSM4LSEBUYA> .

huangwei4478 · Answer 20 · Sat Apr 18 2020 10:05:43 GMT+0800 (China Standard Time)

They are the same both pointing to "build" path. [image: image.png] [image: image.png]
…
On Wed, Apr 1, 2020 at 5:05 AM RetVal @.***> wrote: I don’t know how to use Xcode. I just did ‘’’ DYLD_INSERT_LIBRARIES=path/to/libobjc.A.dylib lldb path/to/debug-objc ‘’’ maybe you can check the build location of the runtime and your demo app, make sure the location of these two was same. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#20 (comment)>, or unsubscribe https://github.com/notifications/unsubscribe-auth/ABIWVZEYWZGYZ7JKVRUBJSDRKMUXVANCNFSM4LSEBUYA .

I have the same problem, try everything i can do but none of them worked, so I give up the newest version，and try compile 756.2 which Git commit is 20d965f，and it worked！hope it can help

This worked for me. 799.1 and 756.2, but not for objc.750

HNZ · Answer 21 · Wed May 06 2020 16:31:03 GMT+0800 (China Standard Time)

Mac OS 10.15.4，Xcode 11.4. I have the same problem,how to solved?

mzF414 · Answer 22 · Tue May 12 2020 13:47:36 GMT+0800 (China Standard Time)

TARGETS -> debug-objc -> Build Settings -> Enable Hardened Runtime = NO
It's works in my clone

HNZ · Answer 23 · Wed May 13 2020 16:04:17 GMT+0800 (China Standard Time)

TARGETS -> debug-objc -> Build Settings -> Enable Hardened Runtime = NO
It's works in my clone

thanks

Deleted user · Answer 24 · Fri May 29 2020 16:50:51 GMT+0800 (China Standard Time)

unfortunately�, it does not work for me. 😞
Mac OS 10.15.4，Xcode 11.4

K9999 · Answer 25 · Tue Jun 02 2020 21:04:59 GMT+0800 (China Standard Time)

work for me by disable csrutil😀

Shizai Lin · Answer 26 · Sun Jun 07 2020 21:32:53 GMT+0800 (China Standard Time)

TARGETS -> debug-objc -> Build Settings -> Enable Hardened Runtime = NO
It's works in my clone

Good solution

zhonglaoban · Answer 27 · Wed Jun 24 2020 10:25:20 GMT+0800 (China Standard Time)

TARGETS -> debug-objc -> Build Settings -> Enable Hardened Runtime = NO
It's works in my clone

save my day time

Keith · Answer 28 · Wed Jul 08 2020 21:59:38 GMT+0800 (China Standard Time)

TARGETS -> debug-objc -> Build Settings -> Enable Hardened Runtime = NO
It's works in my clone

really really thanks, I almost give up...

Xding · Answer 29 · Fri Aug 28 2020 17:02:51 GMT+0800 (China Standard Time)

SIP

csrutil disable worked for me, thanks.

Guanghui Liao · Answer 30 · Tue Dec 08 2020 10:56:08 GMT+0800 (China Standard Time)

TARGETS -> debug-objc -> Build Settings -> Enable Hardened Runtime = NO
It's works in my clone

It's worked on Catalina, but not on Big Sur.

kyson · Answer 31 · Thu Mar 25 2021 08:53:18 GMT+0800 (China Standard Time)

kyson老师的小专栏里说的很清楚了：https://xiaozhuanlan.com/runtime