unable to find source line info for address

[czlovemath123]

Sorry for leaving this message here because I do not know how to solve this problem.

I have tried using bfd and dwarf/elf to convert the binary to the source line number but all failed.

mpiP Configuration Summary

C compiler : mpicc
C++ compiler : mpicxx
Fortran compiler : mpif90

Timer : MPI_Wtime
Stack Unwinding : libunwind
Address to Source Lookup : bfd

MPI-I/O support : yes
MPI-RMA support : yes
MPI-NBC support : yes

---

mpiP Configuration Summary

C compiler : mpicc
C++ compiler : mpicxx
Fortran compiler : mpif90

Timer : MPI_Wtime
Stack Unwinding : libunwind
Address to Source Lookup : libelf/libdwarf

MPI-I/O support : yes
MPI-RMA support : yes
MPI-NBC support : yes

---

The source line of the output always look like this:

28 @--- Callsites: 4 ---------------------------------------------------------
29 ---------------------------------------------------------------------------
30 ID Lev File/Address Line Parent_Funct MPI_Call
31 1 0 0x7fe7d3ae7b2a [unknown] Recv
32 2 0 0x7f260692259a [unknown] Send
33 3 0 0x7f1637a7859a [unknown] Send
34 4 0 0x7f044e9dc59a [unknown] Send

Can someone point me to the right direction? Much appreciated!

[czlovemath123]

I compiled the code with -g -L/path_to_libmpiP.so -lmpiP

[luozijun123]

请问你解决这个问题了吗

[2397798540]

--disable-libunwind

Stack Unwinding: glibc-backtrace

[sant0s12]

Setting a higher k seems to help

[amir-raoofy]

I experienced a similar issue, and thanks to @schulzm, I traced this back to address randomization, which seems to be enabled by default in many distributions. This work around worked for me.

https://askubuntu.com/questions/318315/how-can-i-temporarily-disable-aslr-address-space-layout-randomization

The background is that the address-to-source translation in mpiP seems to only happen on one of the MPI processes (e.g., rank 0), assuming that the addresses are the same on different processes. Address randomization breaks this assumption.