Commit 0e82dc7b authored by Max Reitz's avatar Max Reitz Committed by Stefan Hajnoczi
Browse files

qemu-io: Add sigraise command 



abort() has the sometimes undesirable side-effect of generating a core
dump. If that is not needed, SIGKILL has the same effect of abruptly
crash qemu; without a core dump.

Thus, -c abort is not always useful to simulate a qemu-io crash;
therefore, this patch adds a new sigraise command which allows raising
a signal.

Signed-off-by: default avatarMax Reitz <mreitz@redhat.com>
Reviewed-by: default avatarFam Zheng <famz@redhat.com>
Message-id: 1418032092-16813-2-git-send-email-mreitz@redhat.com
Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
parent 30af51ce

qemu-io-cmds.c

+46 −0
Original line number Diff line number Diff line
@@ -2048,6 +2048,51 @@ static const cmdinfo_t abort_cmd = { 
       .oneline        = "simulate a program crash using abort(3)",

};



static void sigraise_help(void)

{

    printf(

"\n"

" raises the given signal\n"

"\n"

" Example:\n"

" 'sigraise %i' - raises SIGTERM\n"

"\n"

" Invokes raise(signal), where \"signal\" is the mandatory integer argument\n"

" given to sigraise.\n"

"\n", SIGTERM);

}



static int sigraise_f(BlockDriverState *bs, int argc, char **argv);



static const cmdinfo_t sigraise_cmd = {

    .name       = "sigraise",

    .cfunc      = sigraise_f,

    .argmin     = 1,

    .argmax     = 1,

    .flags      = CMD_NOFILE_OK,

    .args       = "signal",

    .oneline    = "raises a signal",

    .help       = sigraise_help,

};



static int sigraise_f(BlockDriverState *bs, int argc, char **argv)

{

    int sig = cvtnum(argv[1]);

    if (sig < 0) {

        printf("non-numeric signal number argument -- %s\n", argv[1]);

        return 0;

    }



    /* Using raise() to kill this process does not necessarily flush all open

     * streams. At least stdout and stderr (although the latter should be

     * non-buffered anyway) should be flushed, though. */

    fflush(stdout);

    fflush(stderr);



    raise(sig);

    return 0;

}



static void sleep_cb(void *opaque)

{

    bool *expired = opaque;
@@ -2202,4 +2247,5 @@ static void __attribute((constructor)) init_qemuio_commands(void) 
    qemuio_add_command(&wait_break_cmd);

    qemuio_add_command(&abort_cmd);

    qemuio_add_command(&sleep_cmd);

    qemuio_add_command(&sigraise_cmd);

}