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Clean up System V IPC objects allocated by test. 

This commit modifies the test program gdb.base/info-os.c so that
it cleans up all allocated System V IPC objects when a fatal
error occurs.  Without this, it was possible for the program
to leave IPC objects on the system, and such objects persist
until they are manually deleted or the system reboots.

I looked at changing the SysV IPC key for allocating the IPC objects to
IPC_PRIVATE.  That would prevent errors due to namespace conflicts with the
key.  However, the test needs to read the actual key number from the 'info
os' command output, and IPC_PRIVATE won't work for that.

gdb/testsuite/ChangeLog:
2015-02-04  Don Breazeal  <donb@codesourcery.com>

        * gdb.base/info-os.c (shmid, semid, msqid): Make variables static
        and initialize them.
        (ipc_cleanup): New function.
        (main): Don't declare shmid, semid, and msqid.  Add a call to
        atexit so that we call ipc_cleanup on exit.
This commit is contained in:
Don Breazeal 2015-02-04 13:15:06 -08:00
parent 881d5d5db0
commit b9394193d0
2 changed files with 26 additions and 4 deletions
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8
gdb/testsuite/ChangeLog
View File

@ -1,3 +1,11 @@
2015-02-04 Don Breazeal <donb@codesourcery.com>
* gdb.base/info-os.c (shmid, semid, msqid): Make variables static
and initialize them.
(ipc_cleanup): New function.
(main): Don't declare shmid, semid, and msqid. Add a call to
atexit so that we call ipc_cleanup on exit.
2015-02-04 Pedro Alves <palves@redhat.com>
* boards/native-extended-gdbserver.exp: Remove any target variant

22
gdb/testsuite/gdb.base/info-os.c
View File

@ -26,6 +26,22 @@
static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
/* System V IPC identifiers. */
static int shmid = -1, semid = -1, msqid = -1;
/* Delete any System V IPC resources that were allocated. */
static void
ipc_cleanup (void)
{
if (shmid >= 0)
shmctl (shmid, IPC_RMID, NULL);
if (semid >= 0)
semctl (semid, 0, IPC_RMID, NULL);
if (msqid >= 0)
msgctl (msqid, IPC_RMID, NULL);
}
void *
thread_proc (void *args)
{
@ -38,7 +54,6 @@ main (void)
{
const int flags = IPC_CREAT | 0666;
key_t shmkey = 3925, semkey = 7428, msgkey = 5294;
int shmid, semid, msqid;
FILE *fd;
pthread_t thread;
struct sockaddr_in sock_addr;
@ -47,6 +62,8 @@ main (void)
socklen_t size;
int status, try, retries = 1000;
atexit (ipc_cleanup);
for (try = 0; try < retries; ++try)
{
shmid = shmget (shmkey, 4096, flags | IPC_EXCL);
@ -135,9 +152,6 @@ main (void)
/* Set breakpoint here. */
shmctl (shmid, IPC_RMID, NULL);
semctl (semid, 0, IPC_RMID, NULL);
msgctl (msqid, IPC_RMID, NULL);
fclose (fd);
close (sock);