lttng-tools.git
5 years agoFix: utils.sh: handle SIGPIPE
Mathieu Desnoyers [Thu, 16 May 2019 19:07:58 +0000 (15:07 -0400)] 
Fix: utils.sh: handle SIGPIPE

perl prove closes its child pipes before giving it a chance to execute
the signal trap handler. This means the child will not be able to
complete execution of the trap handler if that handler writes to stdout
or stderr.

Work-around this situation by redirecting stdin, stdout, and stderr
to /dev/null if a SIGPIPE is caught.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix: tests: error handling in high throughput limits test (v2)
Mathieu Desnoyers [Thu, 16 May 2019 19:07:57 +0000 (15:07 -0400)] 
Fix: tests: error handling in high throughput limits test (v2)

Each individual call to "tc" should be checked for error, else we
may fail to catch specific tc errors caused, for instance, by a
kernel configuration that only contains some of the required
class modules.

Also, invoke the utils.sh full_cleanup function from the script-specific
interrupt_cleanup trap handler rather than try to perform stopping
of relayd and sessiond within the script.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoImprove handling of test SIGTERM/SIGINT (v2)
Mathieu Desnoyers [Thu, 16 May 2019 19:07:56 +0000 (15:07 -0400)] 
Improve handling of test SIGTERM/SIGINT (v2)

The current state of signal handling for test scripts is: on
SIGTERM/SIGINT of the tests (e.g. a CTRL-C on the console), session
daemon and relay daemon are killed with SIGKILL, thus leaking all their
resources, and leaving lttng kernel modules loaded.

Revamp the "stop" functions to take a signal number and a timeout
as optional parameters. The default signal number is SIGTERM.

The full_cleanup trap handler now tries to nicely kill relayd and
sessiond (if they are present) with SIGTERM, and wait up to the
user-configurable LTTNG_TEST_TEARDOWN_TIMEOUT environment variable
(which has a default of 60s). Then, if there are still either relayd,
sessiond, or consumerd present, it will SIGKILL them and wait for
them to vanish. If it had to kill sessiond with SIGKILL, it will
also explicitly try to unload the lttng modules with modprobe.

This approach is inspired from sysv init script shutdown behavior.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix: check validity of a stream before invoking ust flush command
Jonathan Rajotte [Wed, 28 Aug 2019 20:36:03 +0000 (16:36 -0400)] 
Fix: check validity of a stream before invoking ust flush command

At the time ustctl_flush_buffer is called the ustream object might have
already been freed on lttng-ust side.

This can happen following a lttng_consumer_cleanup_relayd and concurrent
consumer flush command (lttng stop).

The chain of events goes as follows.

An error on communication with lttng-relayd occurs.
lttng_consumer_cleanup_relayd flags the streams for deletion
(CONSUMER_ENDPOINT_INACTIVE). validate_endpoint_status_data_stream calls
consumer_del_stream.

At the same time the hash table of streams is iterated over in the
flush_channel function following a stop command. The loop is iterating on
a given stream. The current thread is unscheduled before taking the stream
lock.

In the initial thread, the same stream is the current iteration of
cds_lfht_for_each_entry in validate_endpoint_status_data_stream.

consumer_del_stream is called on it. The stream lock is acquired, and
destroy_close_stream is called. lttng_ustconsumer_del_stream is eventually
called and at this point the ustream is freed.

Going back to the iteration in flush_channel. The current stream is still
valid from the point of view of the iteration, ustctl_flush_buffer is then
called on a freed ustream object.

This can lead to unknown behaviour since there is no validation on the
lttng-ust side. The underlying memory of the ustream object is garbage at
this point.

To prevent such scenario, we check for the presence of the node in the
hash table via cds_lfht_is_node_deleted while holding the stream lock.
This is valid because the stream destruction removes the node from
the hash table and frees the ustream object with the stream lock held.

This duplicate similar "validation" check of the stream object. [1][2]

[1] src/common/consumer/consumer.c:consumer_close_channel_streams
[2] src/common/ust-consumer/ust-consumer.c:close_metadata

This issue can be reproduced by the following scenario:

    Modify flush_channel to sleep (i.e 10s) before acquiring the lock on
    a stream.

    Modify lttng-ust ustctl_destroy_stream to set the
    ring_buffer_clock_read callback to NULL.
      Note: An assert on !cds_lfht_is_node_deleted in flush channel
      after acquiring the lock can provide the same information. We are
      modifying the callback to simulate the original backtrace from our
      customer.

    lttng-relayd
    lttng-sessiond
    lttng create --live
    lttng enable-event -u -a
    lttng start
    Start some applications to generate data.
    lttng stop
      The stop command force a flush of the channel/streams.
    pkill -9 lttng-relayd
    Expect assert or segfault

The original customer backtrace:

  0  lib_ring_buffer_try_switch_slow (handle=<optimized out>, tsc=<synthetic pointer>, offsets=0x3fffa9b76c80, chan=0x3fff98006e90, buf=<optimized out>,
     mode=<optimized out>) at /usr/src/debug/lttng-ust/2.9.1/git/libringbuffer/ring_buffer_frontend.c:1834
  1  lib_ring_buffer_switch_slow (buf=0x3fff98016b40, mode=<optimized out>, handle=0x3fff98017670)
     at /usr/src/debug/lttng-ust/2.9.1/git/libringbuffer/ring_buffer_frontend.c:1952
  2  0x00003fffac680940 in ustctl_flush_buffer (stream=<optimized out>, producer_active=<optimized out>)
     at /usr/src/debug/lttng-ust/2.9.1/git/liblttng-ust-ctl/ustctl.c:1568
  3  0x0000000010031bc8 in flush_channel (chan_key=<optimized out>) at ust-consumer.c:772
  4  lttng_ustconsumer_recv_cmd (ctx=<optimized out>, sock=<optimized out>, consumer_sockpoll=<optimized out>) at ust-consumer.c:1651
  5  0x000000001000de50 in lttng_consumer_recv_cmd (ctx=<optimized out>, sock=<optimized out>, consumer_sockpoll=<optimized out>) at consumer.c:2011
  6  0x0000000010014208 in consumer_thread_sessiond_poll (data=0x10079430) at consumer.c:3192
  7  0x00003fffac608b30 in start_thread (arg=0x3fffa9b7bdb0) at pthread_create.c:462
  8  0x00003fffac530d0c in .__clone () at ../sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S:96

Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix: initialize syscall table when kernel tracer is lazily initialized
Mathieu Desnoyers [Thu, 23 May 2019 16:56:57 +0000 (12:56 -0400)] 
Fix: initialize syscall table when kernel tracer is lazily initialized

How to reproduce:

start lttng-sessiond while lttng-modules are not installed, then install
lttng-modules. Then issue "lttng list --syscall -k". It will show an
empty syscall list because the system call list has not been
initialized.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoUpdate version to v2.10.7 v2.10.7
Jérémie Galarneau [Fri, 24 May 2019 19:25:20 +0000 (15:25 -0400)] 
Update version to v2.10.7

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoUpdate base test for binding
Jonathan Rajotte [Thu, 23 May 2019 18:11:35 +0000 (14:11 -0400)] 
Update base test for binding

This test is not run for now as it is not part of the test suite.

Use a temporary directory to store trace.
Split in 2 test suite, one for ust and the other for kernel.
Partially fix formatting.

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix: python binding: expose domain buffer type
Jonathan Rajotte [Thu, 23 May 2019 18:02:26 +0000 (14:02 -0400)] 
Fix: python binding: expose domain buffer type

On enable_channel the domain buffer type is used to create a temporary
channel. This currently fail for kernel channel since the buffer type is
not exposed at the binding level and default to LTTNG_BUFFER_PER_PID.
Channel for the kernel domain can only be created in LTTNG_BUFFER_GLOBAL
mode.

Exposing the buffer type also allow userpsace channel to use the per uid
buffering scheme.

The current bindings are in a rough state. This is to at least get them
to work with kernel domain.

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix: lttng_poll_mod calls compat_(e)poll_add
Yannick Lamarre [Thu, 25 Apr 2019 22:23:27 +0000 (18:23 -0400)] 
Fix: lttng_poll_mod calls compat_(e)poll_add

lttng_poll_mod should call compat_(e)poll_mod.

Signed-off-by: Yannick Lamarre <ylamarre@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix: getgrnam is not MT-Safe, use getgrnam_r
Jonathan Rajotte [Mon, 1 Apr 2019 20:33:41 +0000 (16:33 -0400)] 
Fix: getgrnam is not MT-Safe, use getgrnam_r

Running the test suite under a Yocto musl build resulted in musl
coredump due to double freeing.

We get the following backtraces:

0  a_crash () at ./arch/x86_64/atomic_arch.h:108
1  unmap_chunk (self=<optimized out>) at src/malloc/malloc.c:515
2  free (p=<optimized out>) at src/malloc/malloc.c:526
3  0x00007f46d9dc3849 in __getgrent_a (f=f@entry=0x7f46d9d1f7e0, gr=gr@entry=0x7f46d9e24460 <gr>, line=line@entry=0x7f46d9e26058 <line>, size=size@entry=0x7f46d92db550, mem=mem@entry=0x7f46d9e26050 <mem>, nmem=nmem@entry=0x7f46d92db558, res=0x7f46d92db548) at src/passwd/getgrent_a.c:45
4  0x00007f46d9dc2e6b in __getgr_a (name=0x487242 "tracing", gid=gid@entry=0, gr=gr@entry=0x7f46d9e24460 <gr>, buf=buf@entry=0x7f46d9e26058 <line>, size=size@entry=0x7f46d92db550, mem=mem@entry=0x7f46d9e26050 <mem>, nmem=0x7f46d92db558, res=0x7f46d92db548) at src/passwd/getgr_a.c:30
5  0x00007f46d9dc3733 in getgrnam (name=<optimized out>) at src/passwd/getgrent.c:37
6  0x0000000000460b29 in utils_get_group_id (name=<optimized out>) at ../../../lttng-tools-2.10.6/src/common/utils.c:1241
7  0x000000000044ee69 in thread_manage_health (data=<optimized out>) at ../../../../lttng-tools-2.10.6/src/bin/lttng-sessiond/main.c:4115
8  0x00007f46d9de1541 in start (p=<optimized out>) at src/thread/pthread_create.c:195
9  0x00007f46d9dee661 in __clone () at src/thread/x86_64/clone.s:22

From another run:

0  a_crash () at ./arch/x86_64/atomic_arch.h:108
1  unmap_chunk (self=<optimized out>) at src/malloc/malloc.c:515
2  free (p=<optimized out>) at src/malloc/malloc.c:526
3  0x00007f5abc210849 in __getgrent_a (f=f@entry=0x7f5abc2733e0, gr=gr@entry=0x7f5abc271460 <gr>, line=line@entry=0x7f5abc273058 <line>, size=size@entry=0x7f5abaef5510, mem=mem@entry=0x7f5abc273050 <mem>, nmem=nmem@entry=0x7f5abaef5518, res=0x7f5abaef5508) at src/passwd/getgrent_a.c:45
4  0x00007f5abc20fe6b in __getgr_a (name=0x487242 "tracing", gid=gid@entry=0, gr=gr@entry=0x7f5abc271460 <gr>, buf=buf@entry=0x7f5abc273058 <line>, size=size@entry=0x7f5abaef5510, mem=mem@entry=0x7f5abc273050 <mem>, nmem=0x7f5abaef5518, res=0x7f5abaef5508) at src/passwd/getgr_a.c:30
5  0x00007f5abc210733 in getgrnam (name=<optimized out>) at src/passwd/getgrent.c:37
6  0x0000000000460b29 in utils_get_group_id (name=<optimized out>) at ../../../lttng-tools-2.10.6/src/common/utils.c:1241
7  0x000000000042dee4 in notification_channel_socket_create () at ../../../../lttng-tools-2.10.6/src/bin/lttng-sessiond/notification-thread.c:238
8  init_thread_state (state=0x7f5abaef5560, handle=0x7f5abbf9be40) at ../../../../lttng-tools-2.10.6/src/bin/lttng-sessiond/notification-thread.c:375
9  thread_notification (data=0x7f5abbf9be40) at ../../../../lttng-tools-2.10.6/src/bin/lttng-sessiond/notification-thread.c:495
10 0x00007f5abc22e541 in start (p=<optimized out>) at src/thread/pthread_create.c:195
11 0x00007f5abc23b661 in __clone () at src/thread/x86_64/clone.s:22

The problem was easily reproducible (~6 crash on ~300 runs). A prototype fix
using mutex around the getgrnam yielded no crash in over 1000 runs. This
patch yielded the same results as the prototype fix.

Unfortunately we cannot rely on a mutex in liblttng-ctl since we cannot
enforce the locking for the application using the lib.

Use getgrnam_r instead.

The previous implementation of utils_get_group_id returned the gid of
the root group (0) on error/not found. lttng_check_tracing_group needs
to know if an error/not found occured, returning the root group is not
enough. We now return the gid via the passed parameter. The caller is
responsible for either defaulting to the root group or propagating the
error.

We also do not want to warn when used in liblttng-ctl context. We might
want to move the warning elsewhere in the future. For now, pass a bool
if we need to warn or not.

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix: logging: log_add_time() save/restore errno
Mathieu Desnoyers [Tue, 2 Apr 2019 17:41:17 +0000 (13:41 -0400)] 
Fix: logging: log_add_time() save/restore errno

The debugging logging macros (e.g. DBG()) are used as printf in the
lttng-tools source files. The printf() implementation does not alter the
errno value, so the fact that log_add_time() (through clock_gettime())
can alter errno is unexpected. For instance, adding a logging statement
for debugging purposes within a function for which errno is expected to
stay unchanged on return will change the behavior between execution with
-vvv and non-verbose.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix relayd: initialize beacon to -1ULL
Mathieu Desnoyers [Wed, 24 Apr 2019 22:56:05 +0000 (18:56 -0400)] 
Fix relayd: initialize beacon to -1ULL

The relayd stream beacon_ts_end field is expected to have the value
-1ULL when unset (no beacon has been received since last index).

However, the initial state is wrong. It is left at the value 0, which
indicates that a live beacon has indeed been received (which is untrue),
which in turn causes a live beacon with ctf_stream_id of -1ULL to be
sent to babeltrace, which does not expect it, and fails.

This issue can be triggered with the following scenario:

1) create live session
2) setup UST per-uid buffers tracing
3) start tracing, without any active traced application
4) hook with babeltrace live client to view the trace
5) run a traced application

Step 5) will cause the babeltrace live client to receive a stream_id of
-1ULL, and error out.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix: relayd: handling of lttng_read errors >= 0
Mathieu Desnoyers [Wed, 3 Apr 2019 20:26:45 +0000 (16:26 -0400)] 
Fix: relayd: handling of lttng_read errors >= 0

errno is only set when lttng_read returns a negative value. Else, we
need to print a ERR() statement rather than use PERROR().

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix tests: NULL pointer dereference in ust channel unit tests
Jérémie Galarneau [Wed, 10 Apr 2019 20:37:42 +0000 (16:37 -0400)] 
Fix tests: NULL pointer dereference in ust channel unit tests

The test_create_ust_channel() test case erroneously checks for
a NULL session instead of a channel. This can result in a
NULL pointer dereference on failure to create a ust channel.

The scope of usess is reduced to prevent similar mistakes in the
future. Moving 'dom' has made it obvious that this variable is
unused. Hence, it is removed.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix tests: NULL pointer dereference in ltt_ust_context unit tests
Jérémie Galarneau [Wed, 10 Apr 2019 20:25:20 +0000 (16:25 -0400)] 
Fix tests: NULL pointer dereference in ltt_ust_context unit tests

The check for the expected context's type must be skipped when
trace_ust_create_context() fails. Otherwise, a NULL pointer
dereference will occur.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoLog the wait-shm's path on shm_open failure
Jérémie Galarneau [Wed, 10 Apr 2019 19:28:15 +0000 (15:28 -0400)] 
Log the wait-shm's path on shm_open failure

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoTests: use modprobe to test for the presence of lttng-modules
Jonathan Rajotte [Wed, 28 Mar 2018 19:21:26 +0000 (15:21 -0400)] 
Tests: use modprobe to test for the presence of lttng-modules

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix: skip test when ust doesn't have perf support
Michael Jeanson [Wed, 20 Mar 2019 21:49:00 +0000 (17:49 -0400)] 
Fix: skip test when ust doesn't have perf support

Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoTests: check for lttng-modules presence
Jonathan Rajotte [Mon, 25 Mar 2019 18:49:39 +0000 (14:49 -0400)] 
Tests: check for lttng-modules presence

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix: Properly sanitize input parameter
Yannick Lamarre [Tue, 26 Mar 2019 19:53:06 +0000 (15:53 -0400)] 
Fix: Properly sanitize input parameter

The lttng client uses the sizeof the containing buffer, defined as
LTTNG_SYMBOL_NAME_LEN, for input string sanitation instead of libc defined
macro NAME_MAX. lttng-enable_channel improperly verified user input
and wrongly discarded valid input in case NAME_MAX was less than the
sizeof the containing buffer for the channel's name.
This patch also fixes potential buffer overflow caused by an improperly
bounded strcpy in the case where NAME_MAX would have been greater than
LTTNG_SYMBOL_NAME_LEN.

Signed-off-by: Yannick Lamarre <ylamarre@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix tests: link libpause_consumer on liblttng-ctl
Michael Jeanson [Tue, 19 Mar 2019 20:56:03 +0000 (16:56 -0400)] 
Fix tests: link libpause_consumer on liblttng-ctl

This preload test library uses symbols from liblttng-ctl which are
resolved when preloaded by GLIBC but not by MUSL.

Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agotap-driver.sh: flush stdout after each test result
Michael Jeanson [Wed, 13 Mar 2019 21:50:55 +0000 (17:50 -0400)] 
tap-driver.sh: flush stdout after each test result

This is useful in a CI system where stdout is fully buffered and you
look at the console output to see which test is hanging.

Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix tests: snapshot size validation failure runs too many test cases
Jérémie Galarneau [Thu, 28 Mar 2019 15:18:38 +0000 (11:18 -0400)] 
Fix tests: snapshot size validation failure runs too many test cases

The snapshot max size test is reported as both passing and failing
when the test case fails.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix tests: the tree origin can be a symlink itself
Jonathan Rajotte [Tue, 12 Mar 2019 18:30:31 +0000 (14:30 -0400)] 
Fix tests: the tree origin can be a symlink itself

Problem:

The base tree is defined as "/tmp/.....XXXXXX".
On systems where "/tmp/" is itself a symlink utils_expand_path will
expand the tree origin itself.

For example on a base core-image-minimal Yocto build /tmp is a symlink
to "/var/tmp", which is a symlink to "/var/volatile".

utils_expand_path will return something like this for the symlink test:
"/var/volative/.....XXXXXX/...." which is the valid result.

Solution:

Simply use realpath on the tree_origin and use this path to perform the
test validation.

This work was performed in the effort to support yocto fully and be able
to run the test suite to detect problem as early as possible.

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix tests: skip test_getcpu_override on single core systems
Jonathan Rajotte [Tue, 12 Mar 2019 18:30:30 +0000 (14:30 -0400)] 
Fix tests: skip test_getcpu_override on single core systems

There is no value in performing this test on single-core system
since the only valid value for the cpu field is 0.

This test currently fails on single-core systems (i.e yocto runqemu)
on the test_getcpu_override_fail test case.

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix: Add POPT_CFLAGS to lttng_CFLAGS
Yannick Lamarre [Fri, 22 Feb 2019 19:33:37 +0000 (14:33 -0500)] 
Fix: Add POPT_CFLAGS to lttng_CFLAGS

The generated makefile was ignoring POPT_CFLAGS when compiling
lttng, but was adding POPT_LIBS to lttng_LDADD. With this commit,
make now honors both settings for applications and tests.

Fixes: #1165
Signed-off-by: Yannick Lamarre <ylamarre@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix: consumer snapshot: handle unsigned long overflow
Mathieu Desnoyers [Tue, 19 Feb 2019 22:47:49 +0000 (17:47 -0500)] 
Fix: consumer snapshot: handle unsigned long overflow

Comparing the consumed iterator and the produced position without
using a difference generates an empty snapshot when the iterator is
before unsigned long overflow and the produced position is after
unsigned long overflow.

This applies to both UST and kernel consumers.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix: wrong error code returned by kernel_snapshot_record()
Jérémie Galarneau [Wed, 27 Mar 2019 19:42:19 +0000 (15:42 -0400)] 
Fix: wrong error code returned by kernel_snapshot_record()

On snapshot error, kernel_snapshot_record() can return
LTTNG_ERR_KERN_CONSUMER_FAIL which means that the kernel consumer
daemon failed to launch. In this path, the appropriate error to
return is LTTNG_ERR_KERN_META_FAIL.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoDocs: document the format of the lttng_session path member
Jérémie Galarneau [Fri, 22 Mar 2019 21:51:14 +0000 (17:51 -0400)] 
Docs: document the format of the lttng_session path member

Document that the path returned through a session listing operation
is not a path nor standard URL. While a UNIX path will be returned
when a session is configured to trace locally, a liblttng-ctl user
should not expect this field to contain a valid URL when a network
streaming (or live) output destination is configured. The "path"
field will hold a custom-formatted string describing the output.

This is arguably unexepected, but since this is currently the only
way to obtain the destination of an existing session, this format
will not be changed to preserve compatiblity with existing tools
which could rely on this format.

A description of the formating used by the session daemon is
added as part of this patch.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix: check illegal combinations of ctrl-url/data-url/ouput/set-url
Jérémie Galarneau [Fri, 22 Mar 2019 21:51:40 +0000 (17:51 -0400)] 
Fix: check illegal combinations of ctrl-url/data-url/ouput/set-url

The lttng CLI must check for illegal combinations of the
--ctrl-url, --data-url, --set-url, and --output options.

The following combinations are mutually exclusive:
  1) --set-url
  2) --ctrl-url + --data-url
  3) --output

Combining these incompatible options resulted in unhelpful
generic error messages since the error is catched a lot farther
than it should.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoRemove duplicate check for dlopen
Michael Jeanson [Thu, 20 Dec 2018 21:16:47 +0000 (16:16 -0500)] 
Remove duplicate check for dlopen

Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoTests: take multiple snapshots in streaming mode
Jonathan Rajotte [Fri, 8 Feb 2019 01:25:41 +0000 (20:25 -0500)] 
Tests: take multiple snapshots in streaming mode

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix: don't destroy the sockets if the snapshot was successful
Jonathan Rajotte [Fri, 8 Feb 2019 01:25:42 +0000 (20:25 -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.

This is verbatim from the fix 1371fc1228461eb532118280e67ab3e9de015757

It is also the same fix.

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix: missing rcu read locking in trigger "unregister all" command
Jérémie Galarneau [Wed, 23 Jan 2019 20:29:14 +0000 (15:29 -0500)] 
Fix: missing rcu read locking in trigger "unregister all" command

While the notification subsystem all runs within a single thread,
the iteration over the triggers hash table must be protected using
the RCU read-side lock since the RCU worker may resize the hash
table while the iteration is performed.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix: notification thread: RCU-safe reclaim of hash table nodes
Jérémie Galarneau [Wed, 23 Jan 2019 20:28:36 +0000 (15:28 -0500)] 
Fix: notification thread: RCU-safe reclaim of hash table nodes

Adapted from master branch commit 83b934ad.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoUpdate version to v2.10.6 v2.10.6
Jérémie Galarneau [Tue, 22 Jan 2019 18:55:01 +0000 (13:55 -0500)] 
Update version to v2.10.6

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix: worker structure is leaked in run_as process
Jérémie Galarneau [Thu, 6 Dec 2018 20:49:04 +0000 (15:49 -0500)] 
Fix: worker structure is leaked in run_as process

The run_as structure (handle) is allocated and initialized before
the fork() that spawns the run_as process. Currently, that structure
is only cleaned-up on the parent's end.

This fix performs the clean-up on the worker's side as well.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix: only free trace_path when it is dynamically allocated
Jérémie Galarneau [Mon, 14 Jan 2019 22:13:32 +0000 (17:13 -0500)] 
Fix: only free trace_path when it is dynamically allocated

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix: leak of filter bytecode and expression on agent event re-enable
Jérémie Galarneau [Sat, 12 Jan 2019 19:53:56 +0000 (14:53 -0500)] 
Fix: leak of filter bytecode and expression on agent event re-enable

The agent subsystem does not properly assume the clean-up of an
event's filter bytecode and expression when a previously disabled
event is re-enabled.

This change ensures that the ownership of both the filter bytecode
and expression is assumed by the agent subsystem and discarded
when a matching event is found.

Steps to reproduce the leak:
$ lttng create
$ lttng enable-event --python allo --filter 'a[42] == 241'
$ lttng disable-event --python allo
$ lttng enable-event --python allo --filter 'a[42] == 241'

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoTest fix: python logging test spams its output
Jérémie Galarneau [Sat, 12 Jan 2019 19:21:24 +0000 (14:21 -0500)] 
Test fix: python logging test spams its output

A set -x/+x pair was erroneously committed as part of the
test_python_logging test script which causes the test to be
unnecessarily verbose.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix: leak of rundir config string
Jérémie Galarneau [Fri, 11 Jan 2019 20:10:08 +0000 (15:10 -0500)] 
Fix: leak of rundir config string

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix: do not repurpose iterator while it is being used
Mathieu Desnoyers [Wed, 12 Dec 2018 22:37:54 +0000 (17:37 -0500)] 
Fix: do not repurpose iterator while it is being used

The hash table iteration uses an iterator that needs to stay valid for
the next loop. Using that same iterator variable in a nested lookup in a
different hash table leads to segmentation fault.

This is a 2.10-specific instance of the issue affecting
bind_trigger_to_matching_channels() which was found in the
master and 2.11 branches. This one affects
handle_notification_thread_command_register_trigger().

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix: run_command_wait() handle partial write
Mathieu Desnoyers [Thu, 13 Dec 2018 18:56:35 +0000 (13:56 -0500)] 
Fix: run_command_wait() handle partial write

Use lttng_write() to handle partial writes (writing less than the
requested amount of bytes) as well as ret = -1, errno = EINTR.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix: tests: test_crash should start sessions
Mathieu Desnoyers [Fri, 16 Nov 2018 18:25:00 +0000 (13:25 -0500)] 
Fix: tests: test_crash should start sessions

test_crash expects side-effects of directory creation to happen while
tracing is still stopped. In preparation for changing that behavior,
ensure that tracing is started when those side-effects are expected.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoAdd *.exe to gitignore for Cygwin
Michael Jeanson [Tue, 27 Nov 2018 19:24:27 +0000 (14:24 -0500)] 
Add *.exe to gitignore for Cygwin

Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 years agoFix: warning 'fd' may be used uninitialized
Michael Jeanson [Thu, 29 Nov 2018 21:49:51 +0000 (16:49 -0500)] 
Fix: warning 'fd' may be used uninitialized

Initialize fd to invalid '-1' and remove unnecessary file_opened.

Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: max_t/min_t macros are missing cast on input
Mathieu Desnoyers [Tue, 13 Nov 2018 17:12:21 +0000 (12:12 -0500)] 
Fix: max_t/min_t macros are missing cast on input

The semantic expected from max_t and min_t is to perform the max/min
comparison in the type provided as first parameter.

Cast the input parameters to the proper type before comparing them,
rather than after. There is no more need to cast the result of the
expression now that both inputs are cast to the right type.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: Connect timeout arithmetic in inet/inet6 (v4)
Mathieu Desnoyers [Tue, 13 Nov 2018 17:12:20 +0000 (12:12 -0500)] 
Fix: Connect timeout arithmetic in inet/inet6 (v4)

The nanoseconds part of the timespec struct time_a is not always
bigger than time_b since it wraps around each second.

Use 64-bit arithmetic to compute the difference.

Merge/move duplicated code into utils.c.

This function is really doing two things. Split it into
timespec_to_ms() and timespec_abs_diff().

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: create_channel_per_pid: remove channel on error
Mathieu Desnoyers [Wed, 14 Nov 2018 22:49:21 +0000 (17:49 -0500)] 
Fix: create_channel_per_pid: remove channel on error

The notification system of the session daemon tracks the lifetime
of per-pid buffers (in effect, channel keys) using two hooks:
  - the successful completion of create_channel_per_pid()
  - the deletion of the channel from an application's registry

Multiple error paths in create_channel_per_pid() can leave a channel
in an app's registry without notifying the notification system of its
existence.

When the channel is finally cleaned-up, the channel deletion hook will
inform the notification system that the channel should be deleted,
resulting in an error as that channel was previously unknown.

This fix ensures we remove the application's channel from its registry
on error (with the notify parameter set to 'false'), thus ensuring
that the notification system never tracks the incomplete channel.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: channel errors on local stress-tests
Mathieu Desnoyers [Wed, 14 Nov 2018 22:46:26 +0000 (17:46 -0500)] 
Fix: channel errors on local stress-tests

On local stress-tests with per-pid buffers, error paths triggered
when trying to create a channel on an application already going away
end up tiggering the channel destruction with "-1" socket parameter.
This function attempts to send a notification of channel destruction
(erroneously) and attempts to sum counters into a channel object which
may not have been populated yet.

Therefore, don't perform those side-effects when invoked from error path
caused by channel creation error.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: channel_ust_create: remove channel on agent error
Mathieu Desnoyers [Wed, 14 Nov 2018 22:45:38 +0000 (17:45 -0500)] 
Fix: channel_ust_create: remove channel on agent error

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoAlways choose large event header for UST channels
Mathieu Desnoyers [Wed, 17 Oct 2018 21:16:12 +0000 (17:16 -0400)] 
Always choose large event header for UST channels

UST can receive the session start command before all probe provider
library constructors have completed running, therefore finding less
events than eventually enabled within the process. Moreover, with
per-uid buffers, many processes end up registering events into shared
buffers. Therefore, the guess based on number of events from the first
process to use the buffer is incorrect.

Considering that we typically have applications with more than 30
events, we will modify the session daemon so it selects the "large"
header type independently of the number of events.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoRemove unnecessary check of output parameter
Jérémie Galarneau [Fri, 5 Oct 2018 16:06:37 +0000 (12:06 -0400)] 
Remove unnecessary check of output parameter

It is not necessary to check for `_notification != NULL` as it
is done at the beginning of the function. Moreover, it confuses
Coverity which warns that `notification` will be leaked if the
output parameter is NULL.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: perform local data pending before checking data pending with relayd
Jonathan Rajotte [Tue, 11 Sep 2018 00:09:15 +0000 (20:09 -0400)] 
Fix: perform local data pending before checking data pending with relayd

Performing the data pending check in two phases, local and network,
reduces the total number network operations needed.

Doing the local check first enable early return in cases where data is
still pending locally.

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: double put on error path
Jonathan Rajotte [Tue, 11 Sep 2018 00:09:11 +0000 (20:09 -0400)] 
Fix: double put on error path

Let relay_index_try_flush be responsible for the self-reference put on
error path.

Code flow of relay_index_try_flush is a bit tricky but the only error
flow (via relay_index_file_write) will always mark the index as flushed
and perform the self-reference put.

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: holding the stream lock does not equate to having data pending
Jonathan Rajotte [Tue, 11 Sep 2018 00:09:14 +0000 (20:09 -0400)] 
Fix: holding the stream lock does not equate to having data pending

The live timer can hold the stream lock while sending empty beacon. An
empty beacon does not mean that data is still pending for the stream.

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: skip uid registry when metadata key is 0
Jonathan Rajotte [Tue, 11 Sep 2018 00:09:13 +0000 (20:09 -0400)] 
Fix: skip uid registry when metadata key is 0

A value of zero for the metadata key indicate that metadata was never
created/pushed to the consumer.

This can occur in scenario were a tracker is present since metadata
might never be created/pushed.

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoDocs: document the meaning of a ust app channel key set to 0
Jérémie Galarneau [Mon, 17 Sep 2018 22:15:11 +0000 (18:15 -0400)] 
Docs: document the meaning of a ust app channel key set to 0

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: acquire stream lock during kernel metadata snapshot
Jérémie Galarneau [Tue, 11 Sep 2018 00:09:12 +0000 (20:09 -0400)] 
Fix: acquire stream lock during kernel metadata snapshot

The stream lock is not taken when interacting with the kernel
metadata stream that is created at the time a snapshot is taken.

This was noticed while reviewing the code for an unrelated reason,
so there is no known problem caused by this. Nevertheless, this
is incorrect as the stream is globally visible in the consumer.

Moreover, the stream was not cleaned-up which can cause a leak
whenever a metadata snapshot fails.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
6 years agoFix: skip closed session on viewer listing
Jonathan Rajotte [Fri, 7 Sep 2018 19:18:38 +0000 (15:18 -0400)] 
Fix: skip closed session on viewer listing

There is  no value in listing  a closed session. A  viewer cannot hook
itself to a closed session in live mode and the session is about to be
removed from the sessions hash table.

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: use LTTNG_VIEWER_ATTACH_UNK to report a closed session
Jonathan Rajotte [Fri, 7 Sep 2018 19:18:37 +0000 (15:18 -0400)] 
Fix: use LTTNG_VIEWER_ATTACH_UNK to report a closed session

LTTNG_VIEWER_NEW_STREAMS_HUP is not a valid error number for the
LTTNG_VIEWER_ATTACH_SESSION command. This result in erroneous error
reporting on the client side.

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoDoc: withinin -> within
Jonathan Rajotte [Mon, 17 Sep 2018 16:19:40 +0000 (12:19 -0400)] 
Doc: withinin -> within

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: perform relayd socket pair cleanup on control socket error
Jonathan Rajotte [Wed, 6 Jun 2018 01:00:28 +0000 (21:00 -0400)] 
Fix: perform relayd socket pair cleanup on control socket error

A reference to the local context for the socket pair is used to "force" an
evaluation of the data and metadata streams since we changed the endpoint
status. This imitates what is currently done for the data socket.

This prevents hitting network timeouts multiple times in a row when an
error occurs. For now, there is no mechanism for retry hence
"terminating" all communication make sense and prevent unwanted delays
on operation.

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: relayd control socket mutex is not destroyed
Jérémie Galarneau [Thu, 13 Sep 2018 21:04:45 +0000 (17:04 -0400)] 
Fix: relayd control socket mutex is not destroyed

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoTests: do not bound test app iterations when in background mode
Jonathan Rajotte [Tue, 3 Jul 2018 18:49:23 +0000 (14:49 -0400)] 
Tests: do not bound test app iterations when in background mode

On systems with a high number of CPUs and slow disk, taking snapshots
can take a long time. When running a long regression test, the tests
sometimes outlive the test application.

The test application then exits since the required number of
iterations was completed
(NR_ITER=2000000).

Set the iterations parameter to -1 to ensure the application keeps
producing events for the duration of the test.

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoTests: add missing rotation and autoload tests to check target
Jérémie Galarneau [Tue, 11 Sep 2018 19:11:39 +0000 (15:11 -0400)] 
Tests: add missing rotation and autoload tests to check target

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoTests: remove temporary folder
Jonathan Rajotte [Tue, 5 Jul 2016 19:23:42 +0000 (15:23 -0400)] 
Tests: remove temporary folder

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoTests: remove mi result files when done
Jonathan Rajotte [Tue, 5 Jul 2016 18:38:46 +0000 (14:38 -0400)] 
Tests: remove mi result files when done

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoTests: Remove unused set +x
Jonathan Rajotte [Wed, 14 Oct 2015 13:57:42 +0000 (09:57 -0400)] 
Tests: Remove unused set +x

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoTests: Kill relayd after sessiond to ensure a clean tear down
Jonathan Rajotte [Tue, 6 Oct 2015 21:10:56 +0000 (17:10 -0400)] 
Tests: Kill relayd after sessiond to ensure a clean tear down

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoTests: Remove unused variable
Jonathan Rajotte [Tue, 6 Oct 2015 16:07:41 +0000 (12:07 -0400)] 
Tests: Remove unused variable

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoTests: Use stop relayd from utils.sh
Jonathan Rajotte [Wed, 30 Sep 2015 22:41:30 +0000 (18:41 -0400)] 
Tests: Use stop relayd from utils.sh

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoTests: remove declaration already present in utils.sh
Jonathan Rajotte [Wed, 30 Sep 2015 22:38:13 +0000 (18:38 -0400)] 
Tests: remove declaration already present in utils.sh

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: incorrect error message on regenerate missing argument
Jérémie Galarneau [Thu, 30 Aug 2018 18:49:29 +0000 (14:49 -0400)] 
Fix: incorrect error message on regenerate missing argument

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: incorrect error message on metadata missing argument
Jérémie Galarneau [Thu, 30 Aug 2018 18:45:23 +0000 (14:45 -0400)] 
Fix: incorrect error message on metadata missing argument

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: snapshot command mishandles missing arguments
Jérémie Galarneau [Thu, 30 Aug 2018 18:32:10 +0000 (14:32 -0400)] 
Fix: snapshot command mishandles missing arguments

The snapshot command does not print explicit errors when
arguments are missing. This commit introduces more error
reporting and ensures that lttng_error_code and cmd_error_code
values are not freely mixed.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: potential use of NULL path in stat() use
Jérémie Galarneau [Thu, 30 Aug 2018 17:36:37 +0000 (13:36 -0400)] 
Fix: potential use of NULL path in stat() use

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: passing null to closedir() on error
Jérémie Galarneau [Wed, 29 Aug 2018 21:28:36 +0000 (17:28 -0400)] 
Fix: passing null to closedir() on error

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: unchecked access to pids array
Jérémie Galarneau [Wed, 29 Aug 2018 21:25:04 +0000 (17:25 -0400)] 
Fix: unchecked access to pids array

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: returned pids may be uninitialized
Jérémie Galarneau [Wed, 29 Aug 2018 20:56:52 +0000 (16:56 -0400)] 
Fix: returned pids may be uninitialized

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: lttng-save command producing wrong XML fields
Francis Deslauriers [Thu, 5 Jul 2018 22:14:54 +0000 (18:14 -0400)] 
Fix: lttng-save command producing wrong XML fields

Saving a session configuration with a probe or a function event would
generate a XML file considered invalid by the lttng-load command.

This is due to the fact that for a probe event lttng-save would the
following xml event type field:
  <type>KPROBE</type>
but lttng-load command would be expecting the following field:
  <type>PROBE</type>.

As a fix, the lttng-save command now rightfully outputs the PROBE field.
Given that this usecase never worked, changing the field is not a
breaking change.

Also, the save command was wrongfully using FUNCTION xml event type for
the LTTNG_KERNEL_FUNCTION event type when it is in fact the
FUNCTION_ENTRY xml event type.

Signed-off-by: Francis Deslauriers <francis.deslauriers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: memory is not zeroed on first set_capacity
Jérémie Galarneau [Tue, 17 Oct 2017 21:22:02 +0000 (17:22 -0400)] 
Fix: memory is not zeroed on first set_capacity

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: dynamic buffer mishandles setting capacity to 0
Jérémie Galarneau [Tue, 17 Oct 2017 03:48:21 +0000 (23:48 -0400)] 
Fix: dynamic buffer mishandles setting capacity to 0

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: client_list_element leak on failure to evaluate a condition
Jérémie Galarneau [Mon, 20 Aug 2018 21:14:06 +0000 (17:14 -0400)] 
Fix: client_list_element leak on failure to evaluate a condition

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: possible NULL dereference in uri_parse_str_urls()
Jérémie Galarneau [Mon, 20 Aug 2018 20:45:09 +0000 (16:45 -0400)] 
Fix: possible NULL dereference in uri_parse_str_urls()

The data_url parsing of uri_parse_str_urls assumes that a ctrl
URL was provided to check that both URLs point to the same
destination. A check for 'ctrl_uris != NULL' is added, but this
function needs to be refactored at some point at it is not clear
what its role is (i.e. it's probably doing too much).

Reported-by: Coverity Scan (1378214 Explicit null dereferenced)
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: clean-up sessiond condig structure on initialization error
Jérémie Galarneau [Mon, 20 Aug 2018 19:50:48 +0000 (15:50 -0400)] 
Fix: clean-up sessiond condig structure on initialization error

The sessiond configuration structure's initialization may fail,
leaving some fields allocated and others to NULL. On error, the
structure should be cleaned-up to prevent a leak.

This allows the rest of the code to assume that all configuration
options are not NULL.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: unchecked return value in sessiond path configuration
Jérémie Galarneau [Mon, 20 Aug 2018 19:22:53 +0000 (15:22 -0400)] 
Fix: unchecked return value in sessiond path configuration

The return values of the functions setting the sessiond's
base paths are not checked.

Reported-by: Coverity Scan (1382768 and 1382769, Unused value)
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoSet consumer's verbosity to the max level on --verbose-consumer
Jérémie Galarneau [Fri, 20 Jul 2018 22:41:49 +0000 (18:41 -0400)] 
Set consumer's verbosity to the max level on --verbose-consumer

The consumer's verbosity is set to '1' when --verbose-consumer
is used when launching the session daemon. This means that all
DBG2/3() statements are ignored.

This commit always sets the consumer's verbosity to the maximal
level.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoTests: added test_autoload to noinst_SCRIPTS
Anders Wallin [Thu, 26 Jul 2018 07:46:28 +0000 (09:46 +0200)] 
Tests: added test_autoload to noinst_SCRIPTS

Signed-off-by: Anders Wallin <wallinux@gmail.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoUpdate version to v2.10.5 v2.10.5
Jérémie Galarneau [Tue, 24 Jul 2018 00:19:57 +0000 (20:19 -0400)] 
Update version to v2.10.5

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: missing context enum values in session xml schema
Francis Deslauriers [Tue, 5 Jun 2018 14:57:48 +0000 (10:57 -0400)] 
Fix: missing context enum values in session xml schema

    Handling of the following enum are added:
        LTTNG_EVENT_CONTEXT_INTERRUPTIBLE
        LTTNG_EVENT_CONTEXT_PREEMPTIBLE
        LTTNG_EVENT_CONTEXT_NEED_RESCHEDULE
        LTTNG_EVENT_CONTEXT_MIGRATABLE

Signed-off-by: Francis Deslauriers <francis.deslauriers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoTests: add session auto-loading test cases
Anders Wallin [Thu, 17 May 2018 20:50:41 +0000 (22:50 +0200)] 
Tests: add session auto-loading test cases

lttng-sessiond can auto load sessions at startup;
- with "--load" option to lttng-sessiond, load one file
  or all sessions files in that directory
- from session files in $LTTNG_HOME/.lttng/sessions/auto/
- from session files in $sysconfdir/lttng/sessions/auto

This test case validates the two first scenarios.

Signed-off-by: Anders Wallin <wallinux@gmail.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoBash completion: ignore namespace for xmllint parsing
Jonathan Rajotte [Mon, 28 May 2018 21:31:48 +0000 (17:31 -0400)] 
Bash completion: ignore namespace for xmllint parsing

xmllint cli does not "easily" support namespace.

One can use the local_name() xpath function and other "trick".
The simplest trick for bash completion is to ignore the namespace
altogether.

Replacing "xmlns" by "ignore" does the job.

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoTypo in ust consumer log message (channek -> channel)
Jérémie Galarneau [Mon, 4 Jun 2018 21:28:56 +0000 (17:28 -0400)] 
Typo in ust consumer log message (channek -> channel)

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: use signed variable for refcounting of consumer_relayd_sock_pair
Jonathan Rajotte [Wed, 14 Mar 2018 18:54:21 +0000 (14:54 -0400)] 
Fix: use signed variable for refcounting of consumer_relayd_sock_pair

Otherwise refcount check after decreasing have no meaning as in
consumer_stream_relayd_close function.

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: warning due to hash_key_str() being not const-correct
Jérémie Galarneau [Wed, 30 May 2018 22:09:19 +0000 (18:09 -0400)] 
Fix: warning due to hash_key_str() being not const-correct

Hash table utils do not enforce const-correct in lttng-tools prior
to 2.11. This results in a warning when pasing a const argument
to those utilities.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoPrint consumerd32/64/kernel configuration
Jonathan Rajotte [Mon, 28 May 2018 20:51:17 +0000 (16:51 -0400)] 
Print consumerd32/64/kernel configuration

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: calling ht_{hash, match}_enum with wrong argument
Francis Deslauriers [Fri, 9 Feb 2018 21:56:49 +0000 (16:56 -0500)] 
Fix: calling ht_{hash, match}_enum with wrong argument

ht_hash_enum and ht_match_enum are currently called with the address of the
pointer to a ust_registry_enum rather than the expected pointer to a
ust_registry_enum. This means that those function calls would end up
using garbage for hashing and comparing.

Signed-off-by: Francis Deslauriers <francis.deslauriers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: probes should be compared strictly by events metadata
Francis Deslauriers [Fri, 9 Feb 2018 21:56:48 +0000 (16:56 -0500)] 
Fix: probes should be compared strictly by events metadata

Currently, events are compared using names and signatures. Events
with different payloads but identical name and signatures could
lead to corrupted trace because the Session Daemon would consider them
identical and give them the same event ID.

Events should be compared using the name, loglevel, fields and
model_emf_uri to ensure that their respective metadata is the same.

Signed-off-by: Francis Deslauriers <francis.deslauriers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 years agoFix: test_ust-dl is generated at configure-time
Francis Deslauriers [Tue, 6 Feb 2018 17:04:27 +0000 (12:04 -0500)] 
Fix: test_ust-dl is generated at configure-time

This file should not be in EXTRA_DIST as it's generated by autoconf and
will thus be available directly in the out-of-tree build directory.

Signed-off-by: Francis Deslauriers <francis.deslauriers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
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