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[Qemu-devel] [PULL 08/19] qemu-io: Add sigraise command
From: |
Stefan Hajnoczi |
Subject: |
[Qemu-devel] [PULL 08/19] qemu-io: Add sigraise command |
Date: |
Fri, 12 Dec 2014 17:09:54 +0000 |
From: Max Reitz <address@hidden>
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: Max Reitz <address@hidden>
Reviewed-by: Fam Zheng <address@hidden>
Message-id: address@hidden
Signed-off-by: Stefan Hajnoczi <address@hidden>
---
qemu-io-cmds.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 46 insertions(+)
diff --git a/qemu-io-cmds.c b/qemu-io-cmds.c
index d94fb1e..e708552 100644
--- a/qemu-io-cmds.c
+++ b/qemu-io-cmds.c
@@ -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);
}
--
2.1.0
- [Qemu-devel] [PULL 00/19] Block patches, Stefan Hajnoczi, 2014/12/12
- [Qemu-devel] [PULL 01/19] block migration: fix return value, Stefan Hajnoczi, 2014/12/12
- [Qemu-devel] [PULL 02/19] vmdk: Fix error for JSON descriptor file names, Stefan Hajnoczi, 2014/12/12
- [Qemu-devel] [PULL 03/19] iotests: Add test for vmdk JSON file names, Stefan Hajnoczi, 2014/12/12
- [Qemu-devel] [PULL 04/19] block/rbd: fix memory leak, Stefan Hajnoczi, 2014/12/12
- [Qemu-devel] [PULL 05/19] block: vhdx - remove redundant comments, Stefan Hajnoczi, 2014/12/12
- [Qemu-devel] [PULL 06/19] block: vhdx - update PAYLOAD_BLOCK_UNMAPPED value to match 1.00 spec, Stefan Hajnoczi, 2014/12/12
- [Qemu-devel] [PULL 07/19] block: vhdx - change .vhdx_create default block state to ZERO, Stefan Hajnoczi, 2014/12/12
- [Qemu-devel] [PULL 08/19] qemu-io: Add sigraise command,
Stefan Hajnoczi <=
- [Qemu-devel] [PULL 09/19] iotests: Filter for "Killed" in qemu-io output, Stefan Hajnoczi, 2014/12/12
- [Qemu-devel] [PULL 10/19] iotests: Fix test 039, Stefan Hajnoczi, 2014/12/12
- [Qemu-devel] [PULL 11/19] block: vhdx - set .bdrv_has_zero_init to bdrv_has_zero_init_1, Stefan Hajnoczi, 2014/12/12
- [Qemu-devel] [PULL 13/19] block: Don't add trailing space in "Formating..." message, Stefan Hajnoczi, 2014/12/12
- [Qemu-devel] [PULL 14/19] block: drop unused bdrv_clear_incoming_migration_all() prototype, Stefan Hajnoczi, 2014/12/12
- [Qemu-devel] [PULL 15/19] linux-aio: queue requests that cannot be submitted, Stefan Hajnoczi, 2014/12/12
- [Qemu-devel] [PULL 16/19] linux-aio: track whether the queue is blocked, Stefan Hajnoczi, 2014/12/12
- [Qemu-devel] [PULL 17/19] linux-aio: rename LaioQueue idx field to "n", Stefan Hajnoczi, 2014/12/12
- [Qemu-devel] [PULL 18/19] linux-aio: drop return code from laio_io_unplug and ioq_submit, Stefan Hajnoczi, 2014/12/12
- [Qemu-devel] [PULL 19/19] linux-aio: simplify removal of completed iocbs from the list, Stefan Hajnoczi, 2014/12/12