I am still getting errors, even with your script.
I will also try to modified build of openmpi that Jeff suggested.
Best,
Florian
% mpicxx -std=c++11 -g -O0 -Wall -Wextra -fno-builtin-strlen mpi_gilles.cpp &&
mpirun -n 2 ./a.out
Stringlength = 64
123456789012345678901234567890123456789012345678901234567890123
% LD_PRELOAD=/usr/lib/valgrind/libmpiwrap-amd64-linux.so mpirun -n 2 valgrind
./a.out
==5324== Memcheck, a memory error detector
==5324== Copyright (C) 2002-2015, and GNU GPL'd, by Julian Seward et al.
==5324== Using Valgrind-3.12.0.SVN and LibVEX; rerun with -h for copyright info
==5324== Command: ./a.out
==5324==
==5325== Memcheck, a memory error detector
==5325== Copyright (C) 2002-2015, and GNU GPL'd, by Julian Seward et al.
==5325== Using Valgrind-3.12.0.SVN and LibVEX; rerun with -h for copyright info
==5325== Command: ./a.out
==5325==
valgrind MPI wrappers 5324: Active for pid 5324
valgrind MPI wrappers 5324: Try MPIWRAP_DEBUG=help for possible options
valgrind MPI wrappers 5325: Active for pid 5325
valgrind MPI wrappers 5325: Try MPIWRAP_DEBUG=help for possible options
Stringlength = 64
==5325== Invalid read of size 1
==5325== at 0x4C2D992: strlen (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==5325== by 0x56852D8: length (char_traits.h:267)
==5325== by 0x56852D8: std::basic_ostream<char, std::char_traits<char> >&
std::operator<< <std::char_traits<char> >(std::basic_ostream<char,
std::char_traits<char> >&, char const*) (ostream:562)
==5325== by 0x408A45: receive() (mpi_gilles.cpp:22)
==5325== by 0x408B88: main (mpi_gilles.cpp:44)
==5325== Address 0xffefff800 is on thread 1's stack
==5325== in frame #2, created by receive() (mpi_gilles.cpp:8)
==5325==
==5325== Invalid read of size 1
==5325== at 0x4C2D9A4: strlen (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==5325== by 0x56852D8: length (char_traits.h:267)
==5325== by 0x56852D8: std::basic_ostream<char, std::char_traits<char> >&
std::operator<< <std::char_traits<char> >(std::basic_ostream<char,
std::char_traits<char> >&, char const*) (ostream:562)
==5325== by 0x408A45: receive() (mpi_gilles.cpp:22)
==5325== by 0x408B88: main (mpi_gilles.cpp:44)
==5325== Address 0xffefff801 is on thread 1's stack
==5325== in frame #2, created by receive() (mpi_gilles.cpp:8)
==5325==
==5325== Invalid read of size 1
==5325== at 0x60A0FF1: _IO_file_xsputn@@GLIBC_2.2.5 (in
/usr/lib/libc-2.23.so)
==5325== by 0x6096D1A: fwrite (in /usr/lib/libc-2.23.so)
==5325== by 0x5684F75: sputn (streambuf:451)
==5325== by 0x5684F75: __ostream_write<char, std::char_traits<char> >
(ostream_insert.h:50)
==5325== by 0x5684F75: std::basic_ostream<char, std::char_traits<char> >&
std::__ostream_insert<char, std::char_traits<char> >(std::basic_ostream<char,
std::char_traits<char> >&, char const*, long) (ostream_insert.h:101)
==5325== by 0x56852E6: std::basic_ostream<char, std::char_traits<char> >&
std::operator<< <std::char_traits<char> >(std::basic_ostream<char,
std::char_traits<char> >&, char const*) (ostream:561)
==5325== by 0x408A45: receive() (mpi_gilles.cpp:22)
==5325== by 0x408B88: main (mpi_gilles.cpp:44)
==5325== Address 0xffefff83e is on thread 1's stack
==5325== in frame #4, created by receive() (mpi_gilles.cpp:8)
==5325==
==5325== Invalid read of size 1
==5325== at 0x60A100D: _IO_file_xsputn@@GLIBC_2.2.5 (in
/usr/lib/libc-2.23.so)
==5325== by 0x6096D1A: fwrite (in /usr/lib/libc-2.23.so)
==5325== by 0x5684F75: sputn (streambuf:451)
==5325== by 0x5684F75: __ostream_write<char, std::char_traits<char> >
(ostream_insert.h:50)
==5325== by 0x5684F75: std::basic_ostream<char, std::char_traits<char> >&
std::__ostream_insert<char, std::char_traits<char> >(std::basic_ostream<char,
std::char_traits<char> >&, char const*, long) (ostream_insert.h:101)
==5325== by 0x56852E6: std::basic_ostream<char, std::char_traits<char> >&
std::operator<< <std::char_traits<char> >(std::basic_ostream<char,
std::char_traits<char> >&, char const*) (ostream:561)
==5325== by 0x408A45: receive() (mpi_gilles.cpp:22)
==5325== by 0x408B88: main (mpi_gilles.cpp:44)
==5325== Address 0xffefff83d is on thread 1's stack
==5325== in frame #4, created by receive() (mpi_gilles.cpp:8)
==5325==
==5325== Invalid read of size 8
==5325== at 0x4C2F758: __GI_memcpy (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==5325== by 0x60A0F3A: _IO_file_xsputn@@GLIBC_2.2.5 (in
/usr/lib/libc-2.23.so)
==5325== by 0x6096D1A: fwrite (in /usr/lib/libc-2.23.so)
==5325== by 0x5684F75: sputn (streambuf:451)
==5325== by 0x5684F75: __ostream_write<char, std::char_traits<char> >
(ostream_insert.h:50)
==5325== by 0x5684F75: std::basic_ostream<char, std::char_traits<char> >&
std::__ostream_insert<char, std::char_traits<char> >(std::basic_ostream<char,
std::char_traits<char> >&, char const*, long) (ostream_insert.h:101)
==5325== by 0x56852E6: std::basic_ostream<char, std::char_traits<char> >&
std::operator<< <std::char_traits<char> >(std::basic_ostream<char,
std::char_traits<char> >&, char const*) (ostream:561)
==5325== by 0x408A45: receive() (mpi_gilles.cpp:22)
==5325== by 0x408B88: main (mpi_gilles.cpp:44)
==5325== Address 0xffefff800 is on thread 1's stack
==5325== in frame #5, created by receive() (mpi_gilles.cpp:8)
==5325==
==5325== Invalid read of size 8
==5325== at 0x4C2F766: __GI_memcpy (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==5325== by 0x60A0F3A: _IO_file_xsputn@@GLIBC_2.2.5 (in
/usr/lib/libc-2.23.so)
==5325== by 0x6096D1A: fwrite (in /usr/lib/libc-2.23.so)
==5325== by 0x5684F75: sputn (streambuf:451)
==5325== by 0x5684F75: __ostream_write<char, std::char_traits<char> >
(ostream_insert.h:50)
==5325== by 0x5684F75: std::basic_ostream<char, std::char_traits<char> >&
std::__ostream_insert<char, std::char_traits<char> >(std::basic_ostream<char,
std::char_traits<char> >&, char const*, long) (ostream_insert.h:101)
==5325== by 0x56852E6: std::basic_ostream<char, std::char_traits<char> >&
std::operator<< <std::char_traits<char> >(std::basic_ostream<char,
std::char_traits<char> >&, char const*) (ostream:561)
==5325== by 0x408A45: receive() (mpi_gilles.cpp:22)
==5325== by 0x408B88: main (mpi_gilles.cpp:44)
==5325== Address 0xffefff810 is on thread 1's stack
==5325== in frame #5, created by receive() (mpi_gilles.cpp:8)
==5325==
==5325== Invalid read of size 2
==5325== at 0x4C2F7B0: __GI_memcpy (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==5325== by 0x60A0F3A: _IO_file_xsputn@@GLIBC_2.2.5 (in
/usr/lib/libc-2.23.so)
==5325== by 0x6096D1A: fwrite (in /usr/lib/libc-2.23.so)
==5325== by 0x5684F75: sputn (streambuf:451)
==5325== by 0x5684F75: __ostream_write<char, std::char_traits<char> >
(ostream_insert.h:50)
==5325== by 0x5684F75: std::basic_ostream<char, std::char_traits<char> >&
std::__ostream_insert<char, std::char_traits<char> >(std::basic_ostream<char,
std::char_traits<char> >&, char const*, long) (ostream_insert.h:101)
==5325== by 0x56852E6: std::basic_ostream<char, std::char_traits<char> >&
std::operator<< <std::char_traits<char> >(std::basic_ostream<char,
std::char_traits<char> >&, char const*) (ostream:561)
==5325== by 0x408A45: receive() (mpi_gilles.cpp:22)
==5325== by 0x408B88: main (mpi_gilles.cpp:44)
==5325== Address 0xffefff838 is on thread 1's stack
==5325== in frame #5, created by receive() (mpi_gilles.cpp:8)
==5325==
==5325== Invalid read of size 2
==5325== at 0x4C2F7BE: __GI_memcpy (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==5325== by 0x60A0F3A: _IO_file_xsputn@@GLIBC_2.2.5 (in
/usr/lib/libc-2.23.so)
==5325== by 0x6096D1A: fwrite (in /usr/lib/libc-2.23.so)
==5325== by 0x5684F75: sputn (streambuf:451)
==5325== by 0x5684F75: __ostream_write<char, std::char_traits<char> >
(ostream_insert.h:50)
==5325== by 0x5684F75: std::basic_ostream<char, std::char_traits<char> >&
std::__ostream_insert<char, std::char_traits<char> >(std::basic_ostream<char,
std::char_traits<char> >&, char const*, long) (ostream_insert.h:101)
==5325== by 0x56852E6: std::basic_ostream<char, std::char_traits<char> >&
std::operator<< <std::char_traits<char> >(std::basic_ostream<char,
std::char_traits<char> >&, char const*) (ostream:561)
==5325== by 0x408A45: receive() (mpi_gilles.cpp:22)
==5325== by 0x408B88: main (mpi_gilles.cpp:44)
==5325== Address 0xffefff83c is on thread 1's stack
==5325== in frame #5, created by receive() (mpi_gilles.cpp:8)
==5325==
==5325== Invalid read of size 1
==5325== at 0x4C2F7E8: __GI_memcpy (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==5325== by 0x60A0F3A: _IO_file_xsputn@@GLIBC_2.2.5 (in
/usr/lib/libc-2.23.so)
==5325== by 0x6096D1A: fwrite (in /usr/lib/libc-2.23.so)
==5325== by 0x5684F75: sputn (streambuf:451)
==5325== by 0x5684F75: __ostream_write<char, std::char_traits<char> >
(ostream_insert.h:50)
==5325== by 0x5684F75: std::basic_ostream<char, std::char_traits<char> >&
std::__ostream_insert<char, std::char_traits<char> >(std::basic_ostream<char,
std::char_traits<char> >&, char const*, long) (ostream_insert.h:101)
==5325== by 0x56852E6: std::basic_ostream<char, std::char_traits<char> >&
std::operator<< <std::char_traits<char> >(std::basic_ostream<char,
std::char_traits<char> >&, char const*) (ostream:561)
==5325== by 0x408A45: receive() (mpi_gilles.cpp:22)
==5325== by 0x408B88: main (mpi_gilles.cpp:44)
==5325== Address 0xffefff83e is on thread 1's stack
==5325== in frame #5, created by receive() (mpi_gilles.cpp:8)
==5325==
123456789012345678901234567890123456789012345678901234567890123
==5325==
==5325== HEAP SUMMARY:
==5325== in use at exit: 96,351 bytes in 247 blocks
==5325== total heap usage: 15,007 allocs, 14,760 frees, 13,362,050 bytes
allocated
==5325==
==5325== LEAK SUMMARY:
==5325== definitely lost: 9,154 bytes in 39 blocks
==5325== indirectly lost: 4,008 bytes in 22 blocks
==5325== possibly lost: 0 bytes in 0 blocks
==5325== still reachable: 83,189 bytes in 186 blocks
==5325== suppressed: 0 bytes in 0 blocks
==5325== Rerun with --leak-check=full to see details of leaked memory
==5325==
==5325== For counts of detected and suppressed errors, rerun with: -v
==5325== ERROR SUMMARY: 138 errors from 9 contexts (suppressed: 0 from 0)
==5324==
==5324== HEAP SUMMARY:
==5324== in use at exit: 96,351 bytes in 247 blocks
==5324== total heap usage: 15,028 allocs, 14,781 frees, 13,370,286 bytes
allocated
==5324==
==5324== LEAK SUMMARY:
==5324== definitely lost: 9,154 bytes in 39 blocks
==5324== indirectly lost: 4,008 bytes in 22 blocks
==5324== possibly lost: 0 bytes in 0 blocks
==5324== still reachable: 83,189 bytes in 186 blocks
==5324== suppressed: 0 bytes in 0 blocks
==5324== Rerun with --leak-check=full to see details of leaked memory
==5324==
==5324== For counts of detected and suppressed errors, rerun with: -v
==5324== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
Am Donnerstag, 3. März 2016, 14:53:24 CET schrieb Gilles Gouaillardet:
> I was unable to reproduce this in my environment.
>
> here is a slightly modified version of your test program.
> buffers are 64 bytes aligned and the string (including the null
> terminator) is 64 bytes long,
> hopefully, strlen will not complain any more.
>
> Cheers,
>
> Gilles
>
> On 3/3/2016 12:51 AM, Florian Lindner wrote:
> > Hello Gilles,
> >
> > Am Mittwoch, 2. März 2016, 23:36:56 CET schrieb Gilles Gouaillardet:
> >> Florian,
> >>
> >> under the hood, strlen() can use vector instructions, and then read memory
> >> above the end of the string. valgrind is extremely picky and does warn
> >> about that.
> >> iirc, there are some filter options not to issue these warnings, but I
> >> forgot the details.
> > Ok, i'll try to research in that direction.
> >
> >> can you try to send "Bonjour" instead of "Halo" and see if the warning
> >> disappear ?
> > They are still there. But, was this meant as a joke or didn't I understand?
> >
> > Best,
> > Florian
> >
> >> Cheers,
> >>
> >> Gilles
> >>
> >> PS if it works, do not jump to the erroneous conclusion valgrind likes
> >> French and dislikes German ;-)
> >>
> >> On Wednesday, March 2, 2016, Florian Lindner <mailingli...@xgm.de> wrote:
> >>
> >>> Hello,
> >>>
> >>> using OpenMPI 1.10.2 and valgrind 3.11.0 I try to use the code below to
> >>> send a c++ string.
> >>>
> >>> It works fine, but running through valgrind gives a lot of memory errors,
> >>> invalid read of size...
> >>>
> >>> What is going wrong there?
> >>>
> >>> Valgrind output, see below.
> >>>
> >>> Thanks!
> >>> Florian
> >>>
> >>>
> >>> // Compile with: mpicxx -std=c++11 -g -O0 -Wall -Wextra mpi.cpp
> >>> #include <mpi.h>
> >>> #include <iostream>
> >>> #include <string>
> >>>
> >>> using namespace std;
> >>>
> >>>
> >>> void receive() {
> >>> int length = 0;
> >>> MPI_Status status;
> >>> MPI_Probe(MPI_ANY_SOURCE, 0, MPI_COMM_WORLD, &status);
> >>> MPI_Get_count(&status, MPI_CHAR, &length);
> >>> cout << "Stringlength = " << length << endl;
> >>> char cstr[length];
> >>> MPI_Recv(cstr,
> >>> length,
> >>> MPI_CHAR,
> >>> MPI_ANY_SOURCE,
> >>> MPI_ANY_TAG,
> >>> MPI_COMM_WORLD,
> >>> MPI_STATUS_IGNORE);
> >>> cout << cstr << endl;
> >>> }
> >>>
> >>> void send(int rankReceiver) {
> >>> std::string s = "Hallo";
> >>> MPI_Send(s.c_str(),
> >>> s.size()+1,
> >>> MPI_CHAR,
> >>> rankReceiver,
> >>> 0,
> >>> MPI_COMM_WORLD);
> >>> }
> >>>
> >>> int main(int argc, char* argv[])
> >>> {
> >>> int rank;
> >>> MPI_Init(&argc, &argv);
> >>>
> >>> MPI_Comm_rank(MPI_COMM_WORLD, &rank);
> >>> if (rank == 0)
> >>> send(1);
> >>> else {
> >>> receive();
> >>> }
> >>> MPI_Finalize();
> >>> return 0;
> >>> }
> >>>
> >>>
> >>> VALGRIND OUTPUT
> >>>
> >>> % mpicxx -std=c++11 -g -O0 -Wall -Wextra mpi.cpp && mpirun -n 2 ./a.out
> >>> Stringlength = 6
> >>> Hallo
> >>> florian@asaru ~/scratch (git)-[master] %
> >>> LD_PRELOAD=/usr/lib/valgrind/libmpiwrap-amd64-linux.so mpirun -n 2
> >>> valgrind
> >>> ./a.out
> >>> ==9290== Memcheck, a memory error detector
> >>> ==9290== Copyright (C) 2002-2015, and GNU GPL'd, by Julian Seward et al.
> >>> ==9290== Using Valgrind-3.11.0 and LibVEX; rerun with -h for copyright
> >>> info
> >>> ==9290== Command: ./a.out
> >>> ==9290==
> >>> ==9291== Memcheck, a memory error detector
> >>> ==9291== Copyright (C) 2002-2015, and GNU GPL'd, by Julian Seward et al.
> >>> ==9291== Using Valgrind-3.11.0 and LibVEX; rerun with -h for copyright
> >>> info
> >>> ==9291== Command: ./a.out
> >>> ==9291==
> >>> valgrind MPI wrappers 9290: Active for pid 9290
> >>> valgrind MPI wrappers 9291: Active for pid 9291
> >>> valgrind MPI wrappers 9290: Try MPIWRAP_DEBUG=help for possible options
> >>> valgrind MPI wrappers 9291: Try MPIWRAP_DEBUG=help for possible options
> >>> Stringlength = 6
> >>> ==9291== Invalid read of size 1
> >>> ==9291== at 0x4C2DBA2: strlen (in
> >>> /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
> >>> ==9291== by 0x56852D8: length (char_traits.h:267)
> >>> ==9291== by 0x56852D8: std::basic_ostream<char, std::char_traits<char>
> >>>> & std::operator<< <std::char_traits<char> >(std::basic_ostream<char,
> >>> std::char_traits<char> >&, char const*) (ostream:562)
> >>> ==9291== by 0x408A39: receive() (mpi.cpp:22)
> >>> ==9291== by 0x408B61: main (mpi.cpp:46)
> >>> ==9291== Address 0xffefff870 is on thread 1's stack
> >>> ==9291== in frame #2, created by receive() (mpi.cpp:8)
> >>> ==9291==
> >>> ==9291== Invalid read of size 1
> >>> ==9291== at 0x4C2DBB4: strlen (in
> >>> /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
> >>> ==9291== by 0x56852D8: length (char_traits.h:267)
> >>> ==9291== by 0x56852D8: std::basic_ostream<char, std::char_traits<char>
> >>>> & std::operator<< <std::char_traits<char> >(std::basic_ostream<char,
> >>> std::char_traits<char> >&, char const*) (ostream:562)
> >>> ==9291== by 0x408A39: receive() (mpi.cpp:22)
> >>> ==9291== by 0x408B61: main (mpi.cpp:46)
> >>> ==9291== Address 0xffefff871 is on thread 1's stack
> >>> ==9291== in frame #2, created by receive() (mpi.cpp:8)
> >>> ==9291==
> >>> ==9291== Invalid read of size 1
> >>> ==9291== at 0x60A0FF1: _IO_file_xsputn@@GLIBC_2.2.5 (in /usr/lib/
> >>> libc-2.23.so)
> >>> ==9291== by 0x6096D1A: fwrite (in /usr/lib/libc-2.23.so)
> >>> ==9291== by 0x5684F75: sputn (streambuf:451)
> >>> ==9291== by 0x5684F75: __ostream_write<char, std::char_traits<char> >
> >>> (ostream_insert.h:50)
> >>> ==9291== by 0x5684F75: std::basic_ostream<char, std::char_traits<char>
> >>>> & std::__ostream_insert<char, std::char_traits<char>
> >>>> (std::basic_ostream<char, std::char_traits<char> >&, char const*, long)
> >>> (ostream_insert.h:101)
> >>> ==9291== by 0x56852E6: std::basic_ostream<char, std::char_traits<char>
> >>>> & std::operator<< <std::char_traits<char> >(std::basic_ostream<char,
> >>> std::char_traits<char> >&, char const*) (ostream:561)
> >>> ==9291== by 0x408A39: receive() (mpi.cpp:22)
> >>> ==9291== by 0x408B61: main (mpi.cpp:46)
> >>> ==9291== Address 0xffefff874 is on thread 1's stack
> >>> ==9291== in frame #4, created by receive() (mpi.cpp:8)
> >>> ==9291==
> >>> ==9291== Invalid read of size 1
> >>> ==9291== at 0x60A100D: _IO_file_xsputn@@GLIBC_2.2.5 (in /usr/lib/
> >>> libc-2.23.so)
> >>> ==9291== by 0x6096D1A: fwrite (in /usr/lib/libc-2.23.so)
> >>> ==9291== by 0x5684F75: sputn (streambuf:451)
> >>> ==9291== by 0x5684F75: __ostream_write<char, std::char_traits<char> >
> >>> (ostream_insert.h:50)
> >>> ==9291== by 0x5684F75: std::basic_ostream<char, std::char_traits<char>
> >>>> & std::__ostream_insert<char, std::char_traits<char>
> >>>> (std::basic_ostream<char, std::char_traits<char> >&, char const*, long)
> >>> (ostream_insert.h:101)
> >>> ==9291== by 0x56852E6: std::basic_ostream<char, std::char_traits<char>
> >>>> & std::operator<< <std::char_traits<char> >(std::basic_ostream<char,
> >>> std::char_traits<char> >&, char const*) (ostream:561)
> >>> ==9291== by 0x408A39: receive() (mpi.cpp:22)
> >>> ==9291== by 0x408B61: main (mpi.cpp:46)
> >>> ==9291== Address 0xffefff873 is on thread 1's stack
> >>> ==9291== in frame #4, created by receive() (mpi.cpp:8)
> >>> ==9291==
> >>> ==9291== Invalid read of size 2
> >>> ==9291== at 0x4C2F9C0: __GI_memcpy (in
> >>> /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
> >>> ==9291== by 0x60A0F3A: _IO_file_xsputn@@GLIBC_2.2.5 (in /usr/lib/
> >>> libc-2.23.so)
> >>> ==9291== by 0x6096D1A: fwrite (in /usr/lib/libc-2.23.so)
> >>> ==9291== by 0x5684F75: sputn (streambuf:451)
> >>> ==9291== by 0x5684F75: __ostream_write<char, std::char_traits<char> >
> >>> (ostream_insert.h:50)
> >>> ==9291== by 0x5684F75: std::basic_ostream<char, std::char_traits<char>
> >>>> & std::__ostream_insert<char, std::char_traits<char>
> >>>> (std::basic_ostream<char, std::char_traits<char> >&, char const*, long)
> >>> (ostream_insert.h:101)
> >>> ==9291== by 0x56852E6: std::basic_ostream<char, std::char_traits<char>
> >>>> & std::operator<< <std::char_traits<char> >(std::basic_ostream<char,
> >>> std::char_traits<char> >&, char const*) (ostream:561)
> >>> ==9291== by 0x408A39: receive() (mpi.cpp:22)
> >>> ==9291== by 0x408B61: main (mpi.cpp:46)
> >>> ==9291== Address 0xffefff870 is on thread 1's stack
> >>> ==9291== in frame #5, created by receive() (mpi.cpp:8)
> >>> ==9291==
> >>> ==9291== Invalid read of size 1
> >>> ==9291== at 0x4C2F9F8: __GI_memcpy (in
> >>> /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
> >>> ==9291== by 0x60A0F3A: _IO_file_xsputn@@GLIBC_2.2.5 (in /usr/lib/
> >>> libc-2.23.so)
> >>> ==9291== by 0x6096D1A: fwrite (in /usr/lib/libc-2.23.so)
> >>> ==9291== by 0x5684F75: sputn (streambuf:451)
> >>> ==9291== by 0x5684F75: __ostream_write<char, std::char_traits<char> >
> >>> (ostream_insert.h:50)
> >>> ==9291== by 0x5684F75: std::basic_ostream<char, std::char_traits<char>
> >>>> & std::__ostream_insert<char, std::char_traits<char>
> >>>> (std::basic_ostream<char, std::char_traits<char> >&, char const*, long)
> >>> (ostream_insert.h:101)
> >>> ==9291== by 0x56852E6: std::basic_ostream<char, std::char_traits<char>
> >>>> & std::operator<< <std::char_traits<char> >(std::basic_ostream<char,
> >>> std::char_traits<char> >&, char const*) (ostream:561)
> >>> ==9291== by 0x408A39: receive() (mpi.cpp:22)
> >>> ==9291== by 0x408B61: main (mpi.cpp:46)
> >>> ==9291== Address 0xffefff874 is on thread 1's stack
> >>> ==9291== in frame #5, created by receive() (mpi.cpp:8)
> >>> ==9291==
> >>> Hallo
> >>> ==9291==
> >>> ==9291== HEAP SUMMARY:
> >>> ==9291== in use at exit: 96,351 bytes in 247 blocks
> >>> ==9291== total heap usage: 15,020 allocs, 14,773 frees, 13,362,383 bytes
> >>> allocated
> >>> ==9291==
> >>> ==9291== LEAK SUMMARY:
> >>> ==9291== definitely lost: 9,154 bytes in 39 blocks
> >>> ==9291== indirectly lost: 4,008 bytes in 22 blocks
> >>> ==9291== possibly lost: 0 bytes in 0 blocks
> >>> ==9291== still reachable: 83,189 bytes in 186 blocks
> >>> ==9291== suppressed: 0 bytes in 0 blocks
> >>> ==9291== Rerun with --leak-check=full to see details of leaked memory
> >>> ==9291==
> >>> ==9291== For counts of detected and suppressed errors, rerun with: -v
> >>> ==9291== ERROR SUMMARY: 14 errors from 6 contexts (suppressed: 0 from 0)
> >>> ==9290==
> >>> ==9290== HEAP SUMMARY:
> >>> ==9290== in use at exit: 96,351 bytes in 247 blocks
> >>> ==9290== total heap usage: 15,018 allocs, 14,771 frees, 13,370,045 bytes
> >>> allocated
> >>> ==9290==
> >>> ==9290== LEAK SUMMARY:
> >>> ==9290== definitely lost: 9,154 bytes in 39 blocks
> >>> ==9290== indirectly lost: 4,008 bytes in 22 blocks
> >>> ==9290== possibly lost: 0 bytes in 0 blocks
> >>> ==9290== still reachable: 83,189 bytes in 186 blocks
> >>> ==9290== suppressed: 0 bytes in 0 blocks
> >>> ==9290== Rerun with --leak-check=full to see details of leaked memory
> >>> ==9290==
> >>> ==9290== For counts of detected and suppressed errors, rerun with: -v
> >>> ==9290== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
> >>>
> >>> _______________________________________________
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> >>> Link to this post:
> >>> http://www.open-mpi.org/community/lists/users/2016/03/28617.php
> >>>
> > _______________________________________________
> > users mailing list
> > us...@open-mpi.org
> > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users
> > Link to this post:
> > http://www.open-mpi.org/community/lists/users/2016/03/28619.php
> >
>
>
