lttng-tools.git
9 years agoFix: poll: show the correct number of fds
Mathieu Desnoyers [Mon, 5 Jan 2015 21:43:07 +0000 (16:43 -0500)] 
Fix: poll: show the correct number of fds

LTTNG_POLL_GETNB() uses wait nb_fd, which is only updated after
lttng_poll_wait returns.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Conflicts:
src/bin/lttng-sessiond/ht-cleanup.c

Conflicts:
src/bin/lttng-sessiond/jul-thread.c

9 years agoFix: compat poll: add missing empty revents checks
Mathieu Desnoyers [Mon, 5 Jan 2015 21:43:05 +0000 (16:43 -0500)] 
Fix: compat poll: add missing empty revents checks

Poll returns the entire array, including entries that have no activity.
We need to check them explicitly.

Fixes #747

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Conflicts:
src/bin/lttng-sessiond/ht-cleanup.c

9 years agoFix: various compat poll/epoll issues
Mathieu Desnoyers [Mon, 5 Jan 2015 21:43:04 +0000 (16:43 -0500)] 
Fix: various compat poll/epoll issues

poll:
- fix two nb_fd off by one in "add",
- simplify array size calculation,
- add error checking,
- compress the content of array before resizing it on "del"
  (out-of-bound memory access issue),
- set wait.nb_fd = 0 when no FD are present in array on wait,
- remove need_realloc flag: this can be checked internally by comparing
  current->alloc_size and wait->alloc_size. Minimize the number of
  duplicated state.

epoll:
- add error checking,
- simplify array size calculation (make it similar to poll),
- Set default size when poll_max_size is 0 within
  compat_epoll_set_max_size(), which allow better error checking
  elsewhere in epoll compat code.

Fixes #747

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Conflicts:
src/common/compat/compat-poll.c

9 years agoFix: ust-app: per-PID app unregister vs tracing stop races
Mathieu Desnoyers [Mon, 5 Jan 2015 02:25:09 +0000 (21:25 -0500)] 
Fix: ust-app: per-PID app unregister vs tracing stop races

There are various races with UST application unregister performed
concurrently with tracing stop operation when tracing with per-pid
buffers. This randomly affects availability of data shortly after the
data pending check returns that no more data is available.

ust_app_stop_trace_all() iterates on all applications in the ust_app_ht
hash table to issue a flush on all buffers. This is needed to ensure
that the sub-buffers being written to are made available to the
consumer, for both data consumption, and for the data pending check.
Failure to execute the sub-buffer flush makes following data pending
check return that there is no data in the buffers too early, thus
resulting in an incomplete trace.

It is therefore important that an application flushes all its buffers
before it is removed from the ust_app_ht.

This is where ust_app_unregister() needs to be fixed. Note that
ust_app_unregister() executes concurrently with
ust_app_stop_trace_all(), only taking the per-session lock. The order of
flush vs hash table removal therefore matters:

We need to push the metadata before removing application from
ust_app_ht. We also need to issue a flush for all application buffers
before removing the application from ust_app_ht.

Once this is fixed, there is yet another race, this time in
ust_app_flush_trace() (now renamed ust_app_flush_session()). It is
caused by the use of ustctl_sock_flush_buffer() which asks the
application to perform the buffer flush. Unfortunately, if the
application vanishes (not reachable anymore), but its unregistration has
not yet been processed by sessiond, then ust_app_stop_trace_all() will
fail to flush the application buffers, because
ustctl_sock_flush_buffer() will fail.

This final issue is fixed by asking the consumer daemon to flush the
associated channel rather than relying on the application.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: data pending: allow empty streams
Mathieu Desnoyers [Mon, 5 Jan 2015 02:25:08 +0000 (21:25 -0500)] 
Fix: data pending: allow empty streams

There are cases where a stream can be completely empty (no packet to
write) with UST: for instance, if a traced application is either
preempted for a long time, terminated, or stopped, between reserve and
commit. This will make the consumer consider that this stream has no
data ready. If this situation occurs in the first sub-buffer of a
stream, this stream will have no data at all (0 bytes).

Therefore, we need to let the data pending check consider that no data
is pending in this situation, otherwise it can make the data pending
check always return that there is data pending.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: ust snapshot: cleanup after error
Mathieu Desnoyers [Mon, 5 Jan 2015 02:25:07 +0000 (21:25 -0500)] 
Fix: ust snapshot: cleanup after error

The "break" statement on error skips the rest of the functions, thus
leaving test applications running after the end of the test, which is a
side-effect on the following tests.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoUpdate version to v2.5.3 v2.5.3
Jérémie Galarneau [Fri, 12 Dec 2014 17:50:31 +0000 (12:50 -0500)] 
Update version to v2.5.3

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: don't destroy the sockets if the snapshot was successful
Julien Desfossez [Tue, 9 Dec 2014 21:38:05 +0000 (16:38 -0500)] 
Fix: don't destroy the sockets if the snapshot was successful

Missing a goto to skip the error condition that was destroying the
relayd sockets even if a snapshot was successful. We want to keep them
open to reuse them for the next snapshots.

Signed-off-by: Julien Desfossez <jdesfossez@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: Missing RCU read lock in kernel_destroy_session()
Jérémie Galarneau [Tue, 2 Dec 2014 03:06:23 +0000 (22:06 -0500)] 
Fix: Missing RCU read lock in kernel_destroy_session()

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: channel names are not validated
Philippe Proulx [Thu, 27 Nov 2014 22:35:32 +0000 (17:35 -0500)] 
Fix: channel names are not validated

This patch ensures:

  1. A channel name does not contain any '/' character, since
     relative paths may be injected in the channel name
     otherwise (knowing that the channel name is eventually
     part of a file name)
  2. A channel name does not start with a '.' character, since
     trace readers (Babeltrace is one of them) could interpret
     files starting with a dot as hidden files and ignore
     them when opening the CTF trace

Fixes: #751
Signed-off-by: Philippe Proulx <eeppeliteloop@gmail.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Conflicts:
include/lttng/lttng-error.h
src/bin/lttng/commands/enable_channels.c
src/common/error.c

9 years agoFix: Apply consumer URI changes to all domains
Jérémie Galarneau [Mon, 1 Dec 2014 21:15:49 +0000 (16:15 -0500)] 
Fix: Apply consumer URI changes to all domains

See the associated bug report for a lenghty explanation of the issue
and of this fix. It fixes an issue when saving a live session's
configuration that was created by loading an .lttng file.

Fixes #866

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: Don't leave events enabled if they were saved in a disabled state
Jérémie Galarneau [Fri, 28 Nov 2014 16:07:17 +0000 (11:07 -0500)] 
Fix: Don't leave events enabled if they were saved in a disabled state

Events are enabled by default on creation. The session configuration
loader must make sure to disable them after creation when restoring an
event that was saved in the "disabled" state.

Reported-by: Marcel Hamer <marcel.hamer@ericsson.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoTest fix: LTTNG_SESSION_CONFIG_XSD_PATH expects an absolute path
Jérémie Galarneau [Fri, 28 Nov 2014 16:58:32 +0000 (11:58 -0500)] 
Test fix: LTTNG_SESSION_CONFIG_XSD_PATH expects an absolute path

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: Memory leak on error in alloc_argv_from_user_opts()
Jérémie Galarneau [Thu, 27 Nov 2014 22:23:48 +0000 (17:23 -0500)] 
Fix: Memory leak on error in alloc_argv_from_user_opts()

*** CID 1256181:  Resource leak  (RESOURCE_LEAK)

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: Unreachable error logging in set_option()
Jérémie Galarneau [Wed, 26 Nov 2014 21:20:21 +0000 (16:20 -0500)] 
Fix: Unreachable error logging in set_option()

*** CID 1256136:  Logically dead code  (DEADCODE)

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: test_utils_expand_path.c: out of memory error handling
Mathieu Desnoyers [Wed, 26 Nov 2014 17:43:32 +0000 (12:43 -0500)] 
Fix: test_utils_expand_path.c: out of memory error handling

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: test test_ust_data.c: check OOM
Mathieu Desnoyers [Wed, 26 Nov 2014 17:39:13 +0000 (12:39 -0500)] 
Fix: test test_ust_data.c: check OOM

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: test libc-wrapper: check malloc OOM
Mathieu Desnoyers [Wed, 26 Nov 2014 17:38:21 +0000 (12:38 -0500)] 
Fix: test libc-wrapper: check malloc OOM

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: lttng-ctl: use zmalloc(), missing OOM check
Mathieu Desnoyers [Wed, 26 Nov 2014 17:37:21 +0000 (12:37 -0500)] 
Fix: lttng-ctl: use zmalloc(), missing OOM check

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: filter-parser.y: use zmalloc(), missing OOM check
Mathieu Desnoyers [Wed, 26 Nov 2014 17:36:37 +0000 (12:36 -0500)] 
Fix: filter-parser.y: use zmalloc(), missing OOM check

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: utils.c: check str*dup OOM
Mathieu Desnoyers [Wed, 26 Nov 2014 17:36:03 +0000 (12:36 -0500)] 
Fix: utils.c: check str*dup OOM

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: rculfhash: use zmalloc()
Mathieu Desnoyers [Wed, 26 Nov 2014 17:34:26 +0000 (12:34 -0500)] 
Fix: rculfhash: use zmalloc()

Follow lttng-tools rules.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: ini.c: use zmalloc()
Mathieu Desnoyers [Wed, 26 Nov 2014 17:34:01 +0000 (12:34 -0500)] 
Fix: ini.c: use zmalloc()

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: lttng lttng.c: check strdup OOM
Mathieu Desnoyers [Wed, 26 Nov 2014 17:33:34 +0000 (12:33 -0500)] 
Fix: lttng lttng.c: check strdup OOM

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: lttng conf.c: use zmalloc()
Mathieu Desnoyers [Wed, 26 Nov 2014 17:33:09 +0000 (12:33 -0500)] 
Fix: lttng conf.c: use zmalloc()

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: lttng view.c missing strdup OOM check
Mathieu Desnoyers [Wed, 26 Nov 2014 17:32:28 +0000 (12:32 -0500)] 
Fix: lttng view.c missing strdup OOM check

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: use zmalloc() in lttng view.c
Mathieu Desnoyers [Wed, 26 Nov 2014 17:32:13 +0000 (12:32 -0500)] 
Fix: use zmalloc() in lttng view.c

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: use zmalloc() in lttng list.c
Mathieu Desnoyers [Wed, 26 Nov 2014 17:31:52 +0000 (12:31 -0500)] 
Fix: use zmalloc() in lttng list.c

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: use zmalloc in lttng enable_events.c
Mathieu Desnoyers [Wed, 26 Nov 2014 17:29:43 +0000 (12:29 -0500)] 
Fix: use zmalloc in lttng enable_events.c

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: Handle empty daemon configuration file lines
Jérémie Galarneau [Sun, 23 Nov 2014 16:30:33 +0000 (11:30 -0500)] 
Fix: Handle empty daemon configuration file lines

Empty daemon configuration file lines such as
my_option=

will cause set_option to be called with an arg value of length 0
which should display a warning.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: missing strdup oom check in lttng create.c
Mathieu Desnoyers [Wed, 26 Nov 2014 17:27:29 +0000 (12:27 -0500)] 
Fix: missing strdup oom check in lttng create.c

Introduce tmp_path to ensure that no code path can possibly try to free
the return value of utils_get_home_dir(). Re-using alloc_path for both
static and dynamically allocated pointer is error-prone.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: lttng add_context.c: use zmalloc
Mathieu Desnoyers [Wed, 26 Nov 2014 17:25:55 +0000 (12:25 -0500)] 
Fix: lttng add_context.c: use zmalloc

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: add missing str*dup oom check in sessiond main.c
Mathieu Desnoyers [Wed, 26 Nov 2014 17:18:07 +0000 (12:18 -0500)] 
Fix: add missing str*dup oom check in sessiond main.c

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: add missing sessiond kernel-consumer missing str*dup oom checks
Mathieu Desnoyers [Wed, 26 Nov 2014 17:17:26 +0000 (12:17 -0500)] 
Fix: add missing sessiond kernel-consumer missing str*dup oom checks

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: add missing strdup OOM check
Mathieu Desnoyers [Wed, 26 Nov 2014 17:16:19 +0000 (12:16 -0500)] 
Fix: add missing strdup OOM check

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
9 years agoFix: Live tracing does not honor live timer after first tracefile with tracefile...
Mathieu Desnoyers [Fri, 21 Nov 2014 17:31:39 +0000 (18:31 +0100)] 
Fix: Live tracing does not honor live timer after first tracefile with tracefile rotation

When we pass to the 2nd sub-file (or following sub-files) of a stream in
relayd, the live timer has no visible effect from a live reader
perspective, and then everything is flushed when we reach the following
sub-file.

This is caused by the reset of stream->total_index_received after each
tracefile rotation. It should keep on incrementing to match what is
expected by check in check_index_status():

  (rstream->total_index_received <= vstream->last_sent_index)

Fixes #863

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoDocs: Add -f/--config option to lttng-sessiond man page
Jérémie Galarneau [Sun, 23 Nov 2014 15:37:06 +0000 (10:37 -0500)] 
Docs: Add -f/--config option to lttng-sessiond man page

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Conflicts:
src/bin/lttng-sessiond/main.c

9 years agoFix: relayd: unbalanced RCU read-side lock/unlock
Mathieu Desnoyers [Fri, 21 Nov 2014 17:38:37 +0000 (18:38 +0100)] 
Fix: relayd: unbalanced RCU read-side lock/unlock

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: relayd: unbalanced RCU read lock/unlock
Mathieu Desnoyers [Fri, 21 Nov 2014 17:42:05 +0000 (18:42 +0100)] 
Fix: relayd: unbalanced RCU read lock/unlock

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: lttng-relayd: unhandled out of memory error
Mathieu Desnoyers [Fri, 21 Nov 2014 17:47:52 +0000 (18:47 +0100)] 
Fix: lttng-relayd: unhandled out of memory error

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 years agoFix: relayd viewer stream: unhandled out of memory error
Mathieu Desnoyers [Fri, 21 Nov 2014 17:49:08 +0000 (18:49 +0100)] 
Fix: relayd viewer stream: unhandled out of memory error

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
10 years agoFix: Missing rcu_read_lock in cmd_list_channels()
Jérémie Galarneau [Tue, 18 Nov 2014 19:19:43 +0000 (14:19 -0500)] 
Fix: Missing rcu_read_lock in cmd_list_channels()

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
10 years agoFix: Missing rcu_read_lock in cmd_snapshot_list_outputs()
Jérémie Galarneau [Tue, 18 Nov 2014 19:10:14 +0000 (14:10 -0500)] 
Fix: Missing rcu_read_lock in cmd_snapshot_list_outputs()

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
10 years agoFix: Missing rcu_read_lock in ust_app_get_nb_stream()
Jérémie Galarneau [Tue, 18 Nov 2014 18:37:29 +0000 (13:37 -0500)] 
Fix: Missing rcu_read_lock in ust_app_get_nb_stream()

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
10 years agoFix: UST subbuffers silently dropped on moderate trace traffic
Mathieu Desnoyers [Tue, 18 Nov 2014 16:33:23 +0000 (17:33 +0100)] 
Fix: UST subbuffers silently dropped on moderate trace traffic

Well, it looks like we really screwed up on this one.

lttng-tools commit 02b3d1769d5f8a33e4109b1e681141c9295dfda6 introduced
an important regression for lttng-ust tracing in the consumer daemon:
after reading a sub-buffer, a check has been added to see whether there
are more sub-buffers available to read, and if it is the case, it
ensures the wakeup pipe will be awakened again.

The issue lies in the use of ustctl_put_next_subbuf() in this check.
This acts as if the sub-buffer has been read, when in reality it has not
been read. It therefore trashes the data contained by this sub-buffer.

This check should use ustctl_put_subbuf(), which does not move the
consumer position.

This is a severe bug, and the fix needs to be applied to stable-2.6,
stable-2.5, and stable-2.4.

Fixes #861

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
10 years agoFix: Missing rcu_read_lock in get_session_max_subbuf_size()
Jérémie Galarneau [Tue, 18 Nov 2014 14:35:48 +0000 (09:35 -0500)] 
Fix: Missing rcu_read_lock in get_session_max_subbuf_size()

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
10 years agoFix: create/destroy a splice_pipe per stream
Julien Desfossez [Wed, 12 Nov 2014 23:36:17 +0000 (18:36 -0500)] 
Fix: create/destroy a splice_pipe per stream

We had a per-thread splice_pipe (one for data and one for metadata), but
in case of error, we would end up filling the write side of the pipe and
never emptying it. This could lead to leaking data from one session to
the other, but also to stall the consumer trying to splice into a full
pipe.

Now we create a splice_pipe per-stream, so it is destroyed when the
session is destroyed.

Fixes: #726
Signed-off-by: Julien Desfossez <jdesfossez@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
10 years agoFix: return EINVAL if agent registration fails
David Goulet [Tue, 7 Oct 2014 19:05:48 +0000 (15:05 -0400)] 
Fix: return EINVAL if agent registration fails

The errno value might be 0 thus not returning an error if so. It has
been seen with an unstable python agent code base which means it could
happen in the future if a third part decides to create an agent.

Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoNote find_ust_app_context must be called with RCU read lock
Jérémie Galarneau [Wed, 12 Nov 2014 20:19:49 +0000 (15:19 -0500)] 
Note find_ust_app_context must be called with RCU read lock

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
10 years agoFix: check userspace perf counter name when looking up contexts
Jérémie Galarneau [Thu, 6 Nov 2014 22:34:08 +0000 (17:34 -0500)] 
Fix: check userspace perf counter name when looking up contexts

create_ust_app_channel_context() looks for a context's existance
in a channel before adding it. However, it only checks for
context types. This is valid for all context types except for
LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER since multiple perf
thread counters may be enabled at the same time.

This fix ensures that the perf counter name is taken into
consideration when checking for a context's presence in a
channel.

Reported-by: Alexander Grigoriev <alexgri@tbricks.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
10 years agoFix: empty indexes_ht before destroying it.
Julien Desfossez [Tue, 11 Nov 2014 20:57:48 +0000 (15:57 -0500)] 
Fix: empty indexes_ht before destroying it.

Fixes: #722
Signed-off-by: Julien Desfossez <jdesfossez@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
10 years agoFix: removed useless key from relay_index
Julien Desfossez [Tue, 11 Nov 2014 20:57:47 +0000 (15:57 -0500)] 
Fix: removed useless key from relay_index

This field was never used except in debug messages (instead of using the
good value that is part of index_n).

Signed-off-by: Julien Desfossez <jdesfossez@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
10 years agoFix: filter bytecode and string memory leak on error
Mathieu Desnoyers [Thu, 13 Nov 2014 22:18:16 +0000 (17:18 -0500)] 
Fix: filter bytecode and string memory leak on error

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
10 years agoFix: HT must not be destroyed with a rcu_read_lock held
Jérémie Galarneau [Sat, 15 Nov 2014 04:38:36 +0000 (23:38 -0500)] 
Fix: HT must not be destroyed with a rcu_read_lock held

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
10 years agoFix: missing rcu_read_lock in cmd_start_trace()
Jérémie Galarneau [Thu, 13 Nov 2014 21:09:57 +0000 (16:09 -0500)] 
Fix: missing rcu_read_lock in cmd_start_trace()

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
10 years agoFix: filter attach vs event enable race
Mathieu Desnoyers [Wed, 12 Nov 2014 23:18:32 +0000 (18:18 -0500)] 
Fix: filter attach vs event enable race

In order to correctly handle the use-case where events are enabled
_after_ trace is started, and _after_ applications are already being
traced, the event should be created in a "disabled" state, so that it
does not trace events until its filter is attached.

This fix needs to be done both in lttng-tools and lttng-ust. In order to
keep ABI compatibility between tools and ust within a stable release
cycle, we introduce a new "disabled" within struct lttng_ust_event
padding (previously zeroed). Newer LTTng-UST checks this flag, and
fallback on the old racy behavior (enabling the event on creation) if it
is unset.

Therefore, old session daemon works with newer lttng-ust of the same
stable release, and vice-versa. However, building lttng-tools requires
an upgraded lttng-ust, which contains the communication protocol with
the new "disabled" field.

This patch should be backported to stable-2.4, stable-2.5, stable-2.6
branches.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
10 years agoBuild fix: use ret directly in error handling path
Jérémie Galarneau [Mon, 10 Nov 2014 22:35:26 +0000 (17:35 -0500)] 
Build fix: use ret directly in error handling path

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
10 years agoFix: Warn the user when enabling an event in a new domain
Christian Babeux [Fri, 7 Nov 2014 23:18:43 +0000 (18:18 -0500)] 
Fix: Warn the user when enabling an event in a new domain

This patch warn the user when trying to enable an event in a new domain
that was not configured prior to the tracing start.

Fixes #826

Signed-off-by: Christian Babeux <christian.babeux@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
10 years agoFix: Don't report an error when listing a session with no channels
Jérémie Galarneau [Fri, 7 Nov 2014 23:07:07 +0000 (18:07 -0500)] 
Fix: Don't report an error when listing a session with no channels

The LTTng sessiond daemon reports an error when the list_channel
command is invoked on a session which only has a metadata channel.

The error lies in assuming that a session which has an enabled
domains also has (user-visible) channels.

The metadata channel should be listed in a future fix.

Fixes #855

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Conflicts:
src/bin/lttng/commands/list.c

10 years agoFix: Add missing URCU_TLS access to error_log_time
Christian Babeux [Fri, 7 Nov 2014 17:17:02 +0000 (12:17 -0500)] 
Fix: Add missing URCU_TLS access to error_log_time

Fixes #849

Signed-off-by: Christian Babeux <christian.babeux@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
10 years agoUpdate version to v2.5.2 v2.5.2
Jérémie Galarneau [Thu, 6 Nov 2014 01:19:05 +0000 (20:19 -0500)] 
Update version to v2.5.2

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
10 years agoUpdate maintainer section of the man pages
Jérémie Galarneau [Wed, 5 Nov 2014 22:34:14 +0000 (17:34 -0500)] 
Update maintainer section of the man pages

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
10 years agoUpdate maintainer section of README
Jérémie Galarneau [Wed, 5 Nov 2014 20:53:22 +0000 (15:53 -0500)] 
Update maintainer section of README

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
10 years agoFix: add README to documentation files
Jérémie Galarneau [Tue, 4 Nov 2014 22:59:29 +0000 (17:59 -0500)] 
Fix: add README to documentation files

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
10 years agoFix: UST consumer sync all available metadata
David Goulet [Fri, 31 Oct 2014 17:23:29 +0000 (13:23 -0400)] 
Fix: UST consumer sync all available metadata

In live mode, the sync metadata function was only working on one single
metadata stream of a given session ID. However, we can have multiple
metadata stream for the same session ID thus failing to send the data in
live mode correctly for the other streams.

This fixes it by simply iterating over all metadata stream for a session
ID and syncing them all.

Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoUpdate version to v2.5.1 v2.5.1
David Goulet [Mon, 20 Oct 2014 19:47:39 +0000 (15:47 -0400)] 
Update version to v2.5.1

Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: handle sysconf possible negative returned value
David Goulet [Wed, 1 Oct 2014 18:57:36 +0000 (14:57 -0400)] 
Fix: handle sysconf possible negative returned value

Fixes Coverity issue 1019947.

Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: channel deref. after NULL check in kernel consumer
David Goulet [Wed, 1 Oct 2014 18:52:33 +0000 (14:52 -0400)] 
Fix: channel deref. after NULL check in kernel consumer

Fixes Coverity issue 1040158.

Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: check for kernel session metadata during init
David Goulet [Wed, 1 Oct 2014 18:49:42 +0000 (14:49 -0400)] 
Fix: check for kernel session metadata during init

Fixes Coverity issue 1040159.

Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: incorrect cast in ust consumer assert
David Goulet [Wed, 1 Oct 2014 18:32:12 +0000 (14:32 -0400)] 
Fix: incorrect cast in ust consumer assert

Fixes Coverity issue 1068813.

Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: bad handling of incoming data in consumer thread
David Goulet [Wed, 1 Oct 2014 18:16:07 +0000 (14:16 -0400)] 
Fix: bad handling of incoming data in consumer thread

This will fix Coverity issue 1019892.

The issue uncovered a more serious problem. The loop on ready FDs of the
thread was exiting at each branch thus not going on all fd. This is
problematic when the thread quit pipe is triggered and when there is
also at the same time a request for metadata from the consumer since the
metadata request could have been ignored.

This patch makes sure we go through all FDs in the loop when the thread
quit pipe or the metadata fd is triggered.

Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: disable event for JUL domain
David Goulet [Fri, 5 Sep 2014 19:17:31 +0000 (15:17 -0400)] 
Fix: disable event for JUL domain

Could not be backported from master. Ref. commit is
0dcfcf94b356c12e3936fa27f350896d96724e4e

This fixes the disable event for JUL that was not working and fixes the
buggy test.

Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: send disable ALL command code if event is *
David Goulet [Fri, 5 Sep 2014 16:12:38 +0000 (12:12 -0400)] 
Fix: send disable ALL command code if event is *

$ lttng disable-event -a
and
$ lttng disable-event '*'

Both commands should do the same meaning send the DISABLE_EVENT_ALL
command to the session daemon.

Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: make sure no index is in flight before using inactivity beacons
Julien Desfossez [Wed, 27 Aug 2014 17:59:21 +0000 (13:59 -0400)] 
Fix: make sure no index is in flight before using inactivity beacons

Since the index is sent in two parts on two separate connections from
the consumer, there can be cases where we receive an inactivity beacon
between the index creation and the data reception.

This fix prevents from using the inactivity beacon if we know a data
index is coming.

Signed-off-by: Julien Desfossez <jdesfossez@efficios.com>
Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: Parenthesize previous statement when adding conditions to a filter
Jérémie Galarneau [Thu, 28 Aug 2014 16:53:43 +0000 (12:53 -0400)] 
Fix: Parenthesize previous statement when adding conditions to a filter

Not parenthesizing the clauses in a filter string causes JUL events to be
traced even though they are not enabled when an enable-event command is
issued with a filter and the --loglevel-only option.

For instance,

lttng enable-event -j "my_event" --loglevel-only JUL_CONFIG -f "int_loglevel > 0 || int_loglevel < 0"

results in the following filter being applied:

int_loglevel > 0 || int_loglevel < 0 && logger_name == "my_event" && int_loglevel == 700

The resulting expression will always evaluate to true, regardless of the logger
name.

This fix parenthesizes each clause to ensure they are all independently
evaluated and not unintuitively affected by operator precedence.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: parse_prob_opts return the actual success of the function
Jonathan Rajotte Julien [Wed, 27 Aug 2014 19:46:57 +0000 (15:46 -0400)] 
Fix: parse_prob_opts return the actual success of the function

This bug have been triggered by the mi merging and the use of a
command_ret in enable_events functions. Previously, enable_events was
reusing the ret variable for another operation and always replacing ret.
Parse_probe_event returned the last output of sscanf which represent
the number of match and not the success of the operation.

Fixes #830

Signed-off-by: Jonathan Rajotte Julien <jonathan.r.julien@gmail.com>
Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: Man page typos
Jérémie Galarneau [Thu, 14 Aug 2014 20:17:22 +0000 (16:17 -0400)] 
Fix: Man page typos

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: disable JUL event on destroy
David Goulet [Tue, 29 Jul 2014 18:11:48 +0000 (14:11 -0400)] 
Fix: disable JUL event on destroy

Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: unbalanced ustconsumer32_data.pid_mutex lock
Mathieu Desnoyers [Mon, 28 Jul 2014 00:38:50 +0000 (20:38 -0400)] 
Fix: unbalanced ustconsumer32_data.pid_mutex lock

It is never locked in this function, but should be. This is triggering
spurious runtime failures on my system, where it seems that sessiond was
sometimes breaking the communication pipe with liblttng-ctl when the
unbalanced unlock is reached.

This should be backported to stable-2.4 and stable-2.5.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoUpdate version to v2.5.0 v2.5.0
David Goulet [Wed, 16 Jul 2014 20:06:20 +0000 (16:06 -0400)] 
Update version to v2.5.0

Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: validate file path creds in autoload mode
David Goulet [Wed, 16 Jul 2014 19:50:31 +0000 (15:50 -0400)] 
Fix: validate file path creds in autoload mode

Validate the credentials only when in auto load mode for the auto/
directory. The lttng load command now checks the session file creds and
validate if it's readable before trying to do so.

Thus with this, a user can load a session from the system wide directory
as long as she/he has the rights to read it.

Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: change session file loading order
David Goulet [Wed, 16 Jul 2014 18:02:56 +0000 (14:02 -0400)] 
Fix: change session file loading order

Libconfig now tries to load a session file from the user directory
followed by the system wide. A user session file should always
supersedes the system wide.

Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: add Loading Sessions section to lttng-sessiond.8
David Goulet [Wed, 16 Jul 2014 17:06:17 +0000 (13:06 -0400)] 
Fix: add Loading Sessions section to lttng-sessiond.8

Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: add default session conf. dir to manpage
David Goulet [Wed, 16 Jul 2014 16:52:08 +0000 (12:52 -0400)] 
Fix: add default session conf. dir to manpage

Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: on session load, add it to the .lttngrc
David Goulet [Tue, 15 Jul 2014 18:28:38 +0000 (14:28 -0400)] 
Fix: on session load, add it to the .lttngrc

Fixes #818

Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: clarify session conf. directory in man
David Goulet [Tue, 15 Jul 2014 18:21:56 +0000 (14:21 -0400)] 
Fix: clarify session conf. directory in man

Fixes #817

Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: filter error path could free invalid ptr
David Goulet [Tue, 15 Jul 2014 13:16:54 +0000 (09:16 -0400)] 
Fix: filter error path could free invalid ptr

Also add a check for a NULL pointer when freeing the filter bytecode so
we don't deref an invalid ptr.

Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: Create a lock file to prevent multiple session daemons
Jérémie Galarneau [Mon, 14 Jul 2014 18:57:10 +0000 (14:57 -0400)] 
Fix: Create a lock file to prevent multiple session daemons

A lock file is used to ensure that only one session daemon per UID is
running on the system. The lock file is created in the rundir.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: relayd stream set close_flag on stream close
David Goulet [Mon, 14 Jul 2014 20:37:05 +0000 (16:37 -0400)] 
Fix: relayd stream set close_flag on stream close

Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: ustctl_get_stream_id without UST support
David Goulet [Mon, 14 Jul 2014 19:49:02 +0000 (15:49 -0400)] 
Fix: ustctl_get_stream_id without UST support

Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: avoid freeing invalid ptr in filter bytecode
David Goulet [Mon, 14 Jul 2014 18:32:10 +0000 (14:32 -0400)] 
Fix: avoid freeing invalid ptr in filter bytecode

Reported-by: Jonathan Rajotte <jonathan.r.julien@gmail.com>
Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: get the stream_id when generating live beacons
Julien Desfossez [Mon, 14 Jul 2014 18:05:48 +0000 (14:05 -0400)] 
Fix: get the stream_id when generating live beacons

When we send an empty index (beacon), we need to extract the stream_id
to avoid stalling the client on inactive streams on startup.
Since the live clients need to know this feature is implemented, we had
to bump the lttng-live protocol version.

This fix should be backported to stable-2.4 as well.

Refs: #811

Signed-off-by: Julien Desfossez <jdesfossez@efficios.com>
10 years agoFix: use biggest subbuffer size for snapshot max-size
David Goulet [Wed, 9 Jul 2014 19:24:04 +0000 (15:24 -0400)] 
Fix: use biggest subbuffer size for snapshot max-size

Instead of using the output max size divided by the total amount of
streams in the session, we find the largest subbuffer in the session's
channels. Using that value, we multiply it by the total amount of
streams which gives us the lower limit of the snapshot size. That is
enough to make sure that we can take the snapshot or not.

Once done, the max stream size possible used for the snapshot record is
the largest subbuffer size in the session. This is to make sure that
every channel can extract the same amount of data which ensure fairness
between each channel in the session.

Fixes #783

Acked-by: Julien Desfossez <jdesfossez@efficios.com>
Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: Possible memory leak when multiple config files are loaded
Jérémie Galarneau [Fri, 11 Jul 2014 19:22:18 +0000 (15:22 -0400)] 
Fix: Possible memory leak when multiple config files are loaded

Some configuration options could leak when initialized multiple times
from different configuration files and from the command line arguments.
The previous options are now freed' before being set.

Fixes #796

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: Clamp verbosity value read from config file
Jérémie Galarneau [Thu, 10 Jul 2014 21:41:08 +0000 (17:41 -0400)] 
Fix: Clamp verbosity value read from config file

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: Unchecked strdup return values in set_option
Jérémie Galarneau [Thu, 10 Jul 2014 21:04:19 +0000 (17:04 -0400)] 
Fix: Unchecked strdup return values in set_option

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoUpdate version to v2.5.0-rc2
David Goulet [Fri, 27 Jun 2014 14:38:10 +0000 (10:38 -0400)] 
Update version to v2.5.0-rc2

Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoTest: add JUL disable event tests
David Goulet [Wed, 18 Jun 2014 13:11:19 +0000 (09:11 -0400)] 
Test: add JUL disable event tests

Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: disable JUL event on UST side
David Goulet [Tue, 17 Jun 2014 19:42:39 +0000 (15:42 -0400)] 
Fix: disable JUL event on UST side

With the new root logger patch in liblttng-ust-jul, we have to disable
the JUL logger on the UST tracer side for the multi session support.

Signed-off-by: David Goulet <dgoulet@efficios.com>
10 years agoFix: add test UST perf to extra dist
David Goulet [Fri, 27 Jun 2014 14:18:48 +0000 (10:18 -0400)] 
Fix: add test UST perf to extra dist

Signed-off-by: David Goulet <dgoulet@efficios.com>
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