Can't debug shared library with gdb

Question

When I attach to process with GDB I saw that warning:

Reading symbols from /CloneFileSystem/lib/ld-uClibc.so.0...
(No debugging symbols found in /CloneFileSystem/lib/ld-uClibc.so.0)
warning: Unable to find dynamic linker breakpoint function.
GDB will be unable to debug shared library initializers
and track explicitly loaded dynamic code.

Even I use set sysroot /CloneFileSystem with all the libraries there, that not help.

My process call to function in shared library and that function call to another function in another shared library.

For example ProcessFunc-> Lib1Func -> Lib2Func

I want to debug Lib2Func but when I run command b Lib2Func gdb can't set a breakpoint there event that library is already loaded

file myexe -> interpreter /lib/ld-uClibc.so.0

When I use info sharedlibrary in GDB I can't the value in From and To (address of loaded are empty)

Do you have the dynamic loader (ld.so or ld-linux.so or whatever) in your cloned sysroot? Run file ./myexe to see the dynamic loader specified for ./myexe. — n. m. could be an AI
– n. m. could be an AI, Commented Dec 6, 2021 at 11:48
@n.1.8e9-where's-my-sharem. When I run file on this exe I got interpreter /lib/ld-uClibc.so.0 and I have this file in lib (I update my post) — vtable
– vtable, Commented Dec 6, 2021 at 12:56

electric chef · Accepted Answer · 2021-12-15 13:51:52Z

1

You might want to try recompiling the library with a -g option. It's saying it can't find the debug info. -g provides for debugging info if you are using gcc. This is the first thing i'd check. If the library is big this may take awhile.

edited Dec 15, 2021 at 13:51

answered Dec 15, 2021 at 13:17

electric chef

117 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

vtable Over a year ago

I can't recompiling the library :)

electric chef Over a year ago

I think i understand. Then you only have only compiled binaries? I don't think you would be able to do this with gdb without having the source. You might have to use a traditional IDE debugger(if you just want to debug the code), even though gdb is way cooler. I think I had a similar problem a while back when I tried to look at c stdlib functions in gdb.

Collectives™ on Stack Overflow

Can't debug shared library with gdb

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related