On Wed, Sep 7, 2016 at 3:25 PM, Halim Amer <[email protected]> wrote:

Regrading missing symbols from dynamic libraries when using gdb on Mac

OS, I personally never managed to make it work, not just with MPICH, but also with other libraries. I consistently do static builds to avoid this problem. If you are able to see symbols from other libraries, we might want to look into this as well. For what it's worth, I've found that lldb works a lot better on Mac, which is not too surprising, since that is what Apple ships. I recall that I need to compile with "-Wl,-pie" to get the best debugging experience. The commands for LLDB are a bit different from GDB but they are intuitive ( http://lldb.llvm.org/tutorial.html). I'm not sure if it helps, but this is what I observed just now... I built my code with these options: $ make CC=/opt/mpich/dev/gcc/default/bin/mpicc CFLAGS="-g -O2 -Wall -Wl,-pie" MPICH is included as a shared library: $ otool -L win_fence.x win_fence.x: /opt/mpich/dev/gcc/default/lib/libmpi.0.dylib (compatibility version 1.0.0, current version 1.0.0) /opt/mpich/dev/gcc/default/lib/libpmpi.0.dylib (compatibility version 1.0.0, current version 1.0.0) /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1226.10.1) /usr/local/lib/gcc/6/libgcc_s.1.dylib (compatibility version 1.0.0, current version 1.0.0) MPICH is built with GCC 6.1.0 with standard options (and debug symbols): $ /opt/mpich/dev/gcc/default/bin/mpicc -show gcc-6 -g -Wl,-flat_namespace -Wl,-commons,use_dylibs -I/opt/mpich/dev/gcc/default/include -L/opt/mpich/dev/gcc/default/lib -lmpi -lpmpi $ /opt/mpich/dev/gcc/default/bin/mpichversion MPICH Version: 3.3a1 MPICH Release date: unreleased development copy MPICH Device: ch3:nemesis MPICH configure: CC=gcc-6 CXX=g++-6 FC=gfortran-6 F77=gfortran-6 --enable-cxx --enable-fortran --enable-threads=runtime --enable-g=dbg --with-pm=hydra --prefix=/opt/mpich/dev/gcc/default --enable-wrapper-rpath --disable-static --enable-shared MPICH CC: gcc-6 -g -O2 MPICH CXX: g++-6 -g MPICH F77: gfortran-6 -g MPICH FC: gfortran-6 -g MPICH Custom Information: The following shows the debug symbols including line numbers into MPICH source: $ lldb ./win_fence.x (lldb) target create "./win_fence.x" Current executable set to './win_fence.x' (x86_64). (lldb) breakpoint set -n MPIR_Barrier_impl Breakpoint 1: where = libpmpi.0.dylib`MPIR_Barrier_impl + 1 at barrier.c:306, address = 0x000000000000af71 (lldb) run Process 87575 launched: './win_fence.x' (x86_64) SUCCESS! Process 87575 stopped * thread #1: tid = 0x2c927c, 0x0000000100144f71 libpmpi.0.dylib`MPIR_Barrier_impl(comm_ptr=0x0000000100391c60, errflag=0x00007fff5fbfef5c) + 1 at barrier.c:306, queue = 'com.apple.main-thread', stop reason = breakpoint 1.1 frame #0: 0x0000000100144f71 libpmpi.0.dylib`MPIR_Barrier_impl(comm_ptr=0x0000000100391c60, errflag=0x00007fff5fbfef5c) + 1 at barrier.c:306 303 int MPIR_Barrier_impl(MPIR_Comm *comm_ptr, MPIR_Errflag_t *errflag) 304 { 305 int mpi_errno = MPI_SUCCESS; -> 306 if (comm_ptr->coll_fns != NULL && comm_ptr->coll_fns->Barrier != NULL) 307 { 308 /* --BEGIN USEREXTENSION-- */ 309 mpi_errno = comm_ptr->coll_fns->Barrier(comm_ptr, errflag); (lldb) bt * thread #1: tid = 0x2c927c, 0x0000000100144f71 libpmpi.0.dylib`MPIR_Barrier_impl(comm_ptr=0x0000000100391c60, errflag=0x00007fff5fbfef5c) + 1 at barrier.c:306, queue = 'com.apple.main-thread', stop reason = breakpoint 1.1 * frame #0: 0x0000000100144f71 libpmpi.0.dylib`MPIR_Barrier_impl(comm_ptr=0x0000000100391c60, errflag=0x00007fff5fbfef5c) + 1 at barrier.c:306 frame #1: 0x0000000100276788 libpmpi.0.dylib`MPID_Win_free(win_ptr=0x00007fff5fbfef88) + 328 at mpidi_rma.c:181 frame #2: 0x00000001000655f1 libmpi.0.dylib`MPI_Win_free(win=0x00007fff5fbfeff0) + 513 at win_free.c:119 frame #3: 0x0000000100000e20 win_fence.x`main(argc=<unavailable>, argv=<unavailable>) + 336 at win_fence.c:64 frame #4: 0x00007fff8afd45ad libdyld.dylib`start + 1 Jeff -- Jeff Hammond [email protected] http://jeffhammond.github.io/ _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss