Fixes a segfault with chord on 100000 hosts, where the backtrace is:
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7b2bd2f in SIMIX_rdv_remove (comm=0x40bd4fd0, rdv=0x0) at ./src/simix/smx_network.c:117
117 xbt_fifo_remove(rdv->comm_fifo, comm);
(gdb) bt
#0 0x00007ffff7b2bd2f in SIMIX_rdv_remove (comm=0x40bd4fd0, rdv=0x0) at ./src/simix/smx_network.c:117
#1 SIMIX_comm_cancel (action=0x40bd4fd0) at ./src/simix/smx_network.c:754
#2 0x00007ffff7b4046e in SIMIX_simcall_pre (simcall=0x613c90, value=0) at ./src/simix/smx_smurf.c:126
#3 0x00007ffff7b407c6 in SIMIX_simcall_push (self=0x613c00) at ./src/simix/smx_smurf.c:26
#4 0x00007ffff7a83a8d in simcall_comm_cancel (comm=0x40bd4fd0) at ./src/simix/smx_user.c:830
#5 MSG_task_cancel (task=0x45ba4eb0) at ./src/msg/msg_task.c:223
#6 0x00007ffff7a83bc0 in MSG_task_destroy (task=0x45ba4eb0) at ./src/msg/msg_task.c:187
#7 0x00007ffff7ac3ebb in SIMIX_comm_destroy (action=0x42078370) at ./src/simix/smx_network.c:274
#8 0x00007ffff7a9603c in SIMIX_process_cleanup (process=0x1ce9da60) at ./src/simix/smx_process.c:87
#9 0x00007ffff7b40208 in SIMIX_simcall_pre (simcall=0x1ce9daf0, value=0) at ./src/simix/smx_smurf.c:323
#10 0x00007ffff7b2554e in SIMIX_run () at ./src/simix/smx_global.c:207
#11 0x00007ffff7b256e7 in MSG_main () at ./src/msg/msg_global.c:155
#12 0x000000000040180b in main (argc=3, argv=<optimized out>) at ./examples/msg/chord/chord.c:918
Git bisect identified commit
6dcde87 as culprit (Use isend
instead of send to set the simdata->comm so that get_remaining
can work.)