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Red Hat Bugzilla – Attachment 1740771 Details for
Bug 1909548
valgrind thinks shmctl(IPC_STAT) doesn't set shm_nattch on aarch64
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shmemtest.c
shmemtest.c (text/x-csrc), 842 bytes, created by
Tom Lane
on 2020-12-20 21:32:04 UTC
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Description:
shmemtest.c
Filename:
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Creator:
Tom Lane
Created:
2020-12-20 21:32:04 UTC
Size:
842 bytes
patch
obsolete
>#include <stdio.h> >#include <stdlib.h> >#include <signal.h> >#include <unistd.h> >#include <sys/file.h> >#include <sys/mman.h> >#include <sys/stat.h> >#include <sys/ipc.h> >#include <sys/shm.h> > >typedef key_t IpcMemoryKey; /* shared memory key passed to shmget(2) */ >typedef int IpcMemoryId; /* shared memory ID returned by shmget(2) */ > >int >main(int argc, char **argv) >{ > IpcMemoryKey memKey = random(); > size_t size = 1024 * 16; > IpcMemoryId shmId; > struct shmid_ds shmStat; > > shmId = shmget(memKey, size, IPC_CREAT | IPC_EXCL | 0600); > > if (shmId < 0) > { > perror("shmget"); > exit(1); > } > > if (shmctl(shmId, IPC_STAT, &shmStat) >= 0) > { > printf("shm_nattch = %ld\n", (long) shmStat.shm_nattch); > } > else > { > perror("shmctl(IPC_STAT)"); > } > > if (shmctl(shmId, IPC_RMID, NULL) < 0) > { > perror("shmctl(IPC_RMID)"); > exit(1); > } > > return 0; >}
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