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| author | hunt <hunt> | 2005-10-18 04:34:05 +0000 |
|---|---|---|
| committer | hunt <hunt> | 2005-10-18 04:34:05 +0000 |
| commit | 1eb8c9ca274c82762a357cf1e7641b113bceb16c (patch) | |
| tree | 485b9c2f24100057eacff7073f7aa48608174230 /runtime | |
| parent | 75eaeba72745c796c3d3ab0374b9f301ad7aae33 (diff) | |
| download | systemtap-steved-1eb8c9ca274c82762a357cf1e7641b113bceb16c.tar.gz systemtap-steved-1eb8c9ca274c82762a357cf1e7641b113bceb16c.tar.xz systemtap-steved-1eb8c9ca274c82762a357cf1e7641b113bceb16c.zip | |
2005-10-17 Martin Hunt <hunt@redhat.com>
* transport.c (_stp_handle_start): Grab semaphore before
calling probe_start() and release after it is done.
(_stp_handle_exit): Ditto for exiting. This prevents
exiting before probe_start() is finished.
Diffstat (limited to 'runtime')
| -rw-r--r-- | runtime/transport/ChangeLog | 7 | ||||
| -rw-r--r-- | runtime/transport/transport.c | 8 |
2 files changed, 15 insertions, 0 deletions
diff --git a/runtime/transport/ChangeLog b/runtime/transport/ChangeLog index f2a8c54d..62baa416 100644 --- a/runtime/transport/ChangeLog +++ b/runtime/transport/ChangeLog @@ -1,3 +1,10 @@ +2005-10-17 Martin Hunt <hunt@redhat.com> + + * transport.c (_stp_handle_start): Grab semaphore before + calling probe_start() and release after it is done. + (_stp_handle_exit): Ditto for exiting. This prevents + exiting before probe_start() is finished. + 2005-10-14 Tom Zanussi <zanussi@us.ibm.com> * relayfs.h: Add ifdef'ed relayfs_fs.h include for mainline diff --git a/runtime/transport/transport.c b/runtime/transport/transport.c index 89c90c96..36d5fc5a 100644 --- a/runtime/transport/transport.c +++ b/runtime/transport/transport.c @@ -19,6 +19,8 @@ static struct rchan *_stp_chan; static struct dentry *_stp_dir; #endif +static DECLARE_MUTEX(_stp_start_mutex); + static int _stp_dpid; static int _stp_pid; @@ -95,7 +97,11 @@ static void _stp_handle_buf_info(int *cpuptr) void _stp_handle_start (struct transport_start *st) { kbug ("stp_handle_start pid=%d\n", st->pid); + + down (&_stp_start_mutex); st->pid = probe_start(); + up (&_stp_start_mutex); + if (st->pid < 0) _stp_exit_called = 1; _stp_transport_send(STP_START, st, sizeof(*st)); @@ -140,7 +146,9 @@ static void _stp_cleanup_and_exit (int closing) */ static void _stp_handle_exit (void *data) { + down (&_stp_start_mutex); _stp_cleanup_and_exit(0); + up (&_stp_start_mutex); } /** |