stuck at mmap called, function address for any android app

[hammad2224]

If i try to inject to a test app then it works fine.
but when i try to inject to android app then it gets stuck here
it is basically stuck at this line
long result=ptrace(PTRACE_GETREGS, pid, NULL, regs);
result is less than 0 so it is basically unable to get the regs value
Any solution to it???

aosp:/ # ./data/local/tmp/injector 18978
process name: nextapp.fx, library path: /data/data/nextapp.fx/lib/libtest.so, pid: 18978
Injection started...
Attached to process 18978
mmap called, function address c3bb48b0 process 18978 size 1024
Write 8 bytes to 0xc76bc7d4 process 18978

[hammad2224]

this tool does not support emulators.
i was testing on emulator so that is why i was getting these errors
testing same code on mobile devices should work fine.