gdb stuck in MPI_Init

[masterleinad]

• Your Windows build number: Microsoft Windows [Version 10.0.16299.371]

• What you're doing and what's happening:

Using the Debian GNU/Linux app running the simple program

#include <mpi.h>

int main(int argc, char *argv[])
{
  MPI_Init(&argc, &argv);
  MPI_Finalize();
}

gdb is stuck in MPI_Init. The gdb version is GNU gdb (Debian 8.1-4) 8.1 and

$ mpicxx -v

gives

Using built-in specs.
COLLECT_GCC=/usr/bin/g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/8/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 8.2.0-1' --with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr --with-gcc-major-version-only --program-suffix=-8 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie --with-system-zlib --with-target-system-zlib --enable-objc-gc=auto --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 8.2.0 (Debian 8.2.0-1)

• What's wrong / what should be happening instead:
  gdb should have no issues stepping through the program.

[onomatopellan]

I can't reproduce this on build 17134. Can you upgrade your Windows 10 and try again?

GNU gdb (Debian 7.12-6) 7.12.0.20161007-git
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from a.out...(no debugging symbols found)...done.
(gdb) b main
Breakpoint 1 at 0x7e4
(gdb) r
Starting program: /home/onoma/test/a.out
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Breakpoint 1, 0x00000000080007e4 in main ()
(gdb) s
Single stepping until exit from function main,
which has no line number information.
[New Thread 0x7ffffc150700 (LWP 508)]
[New Thread 0x7ffffb940700 (LWP 509)]
[Thread 0x7ffffb940700 (LWP 509) exited]
[Thread 0x7ffffc150700 (LWP 508) exited]
__libc_start_main (main=0x80007e0 <main>, argc=1, argv=0x7ffffffee468, init=<optimized out>, fini=<optimized out>,
    rtld_fini=<optimized out>, stack_end=0x7ffffffee458) at ../csu/libc-start.c:325
325     ../csu/libc-start.c: No such file or directory.
(gdb) s
__GI_exit (status=0) at exit.c:105
105     exit.c: No such file or directory.
(gdb)

[therealkenc]

[Version 10.0.16299.371]

Yeah almost certainly addressed with the gdb fixes since then. Maybe #2333 addressed in 17017. Try 1803 aka 17134 aka RS4 aka April 2018 Update. If the problem persists ping this issue and we can revisit.

[masterleinad]

Yes, after upgrading the code runs as expected in gdb. Thanks!