linux-toradex.git/tools/lib/traceevent/kbuffer-parse.c, branch v5.5-rc7

tools lib traceevent: Add more debugging to see various internal ring buffer entries

2019-04-01T18:18:09+00:00

When trace-cmd report --debug is set, show the internal ring buffer
entries like time-extends and padding. This requires adding new kbuffer
API to retrieve these items.

Signed-off-by: Steven Rostedt (VMware) 
Cc: Andrew Morton 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Tzvetomir Stoyanov 
Link: http://lkml.kernel.org/r/20190401164343.257591565@goodmis.org
Signed-off-by: Arnaldo Carvalho de Melo

tools lib traceevent: Change to SPDX License format

2018-08-20T11:54:58+00:00

Replace the GPL text with SPDX tags in the tools/lib/traceevent files.

Signed-off-by: Steven Rostedt 
Cc: Jiri Olsa 
Cc: Tzvetomir Stoyanov (VMware) 
Cc: Yordan Karadzhov (VMware) 
Cc: linux-trace-devel@vger.kernel.org
Link: http://lkml.kernel.org/r/20180816111015.125e0f25@gandalf.local.home
Signed-off-by: Arnaldo Carvalho de Melo

tools lib traceevent: Add UL suffix to MISSING_EVENTS

2018-01-17T13:22:49+00:00

Add UL suffix to MISSING_EVENTS since ints shouldn't be left shifted by 31.

Signed-off-by: Michael Sartain 
Acked-by: Namhyung Kim 
Cc: Andrew Morton 
Link: http://lkml.kernel.org/r/20171016165542.13038-4-mikesart@fastmail.com
Link: http://lkml.kernel.org/r/20180112004822.829533885@goodmis.org
Signed-off-by: Steven Rostedt 
Signed-off-by: Arnaldo Carvalho de Melo

tools lib traceevent: Initialize lenght on OLD_RING_BUFFER_TYPE_TIME_STAMP

2017-02-13T20:22:32+00:00

A undefined value was being used for the OLD_RING_BUFFER_TYPE_TIME_STAMP
case entry, as the 'length' variable was not being initialized, fix it.

Caught by the reporter when building tools/perf/ using clang, which emmitted
this warning:

  kbuffer-parse.c:312:7: warning: variable 'length' is used uninitialized whenever switch case is taken [-Wsometimes-uninitialized]
          case OLD_RINGBUF_TYPE_TIME_EXTEND:
               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
  kbuffer-parse.c:339:29: note: uninitialized use occurs here
          kbuf->next = kbuf->index + length;
                                   ^~~~~~
  kbuffer-parse.c:297:21: note: initialize the variable 'length' to silence this warning
          unsigned int length;
                             ^
                              = 0

Reported-by: Arnaldo Carvalho de Melo 
Signed-off-by: Steven Rostedt 
Cc: Adrian Hunter 
Cc: David Ahern 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Wang Nan 
Link: http://lkml.kernel.org/r/20170213121418.47f279e8@gandalf.local.home
Signed-off-by: Arnaldo Carvalho de Melo

tools lib traceevent: Fix kbuffer_read_at_offset()

2016-10-05T14:36:22+00:00

When it's called with an offset less than or equal to the first event,
it'll return a garbage value since the data is not initialized.

Signed-off-by: Namhyung Kim 
Acked-by: Steven Rostedt 
Cc: Jiri Olsa 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/20161001101700.29146-1-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

tools lib traceevent: Add way to find sub buffer boundary

2015-03-24T15:22:09+00:00

For debugging purposes, it may be helpful for the kbuffer library to flag
when crossing a sub buffer.

Signed-off-by: Steven Rostedt 
Cc: Andrew Morton 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Link: http://lkml.kernel.org/r/20150324135923.650983637@goodmis.org
Signed-off-by: Arnaldo Carvalho de Melo

tools lib traceevent kbuffer: Remove extra update to data pointer in PADDING

2015-03-24T15:22:04+00:00

When a event PADDING is hit (a deleted event that is still in the ring
buffer), translate_data() sets the length of the padding and also updates
the data pointer which is passed back to the caller.

This is unneeded because the caller also updates the data pointer with
the passed back length. translate_data() should not update the pointer,
only set the length.

Signed-off-by: Steven Rostedt 
Cc: Andrew Morton 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: stable@vger.kernel.org # 3.12+
Link: http://lkml.kernel.org/r/20150324135923.461431960@goodmis.org
Signed-off-by: Arnaldo Carvalho de Melo

tools lib traceevent: Port kbuffer parser routines

2013-07-12T16:52:16+00:00

kbuffer code is for parsing ftrace ring-buffer binary data and used
for trace-cmd.  Move the code here in order to be used more widely.

Signed-off-by: Namhyung Kim 
Original-patch-by: Steven Rostedt 
Acked-by: Steven Rostedt 
Cc: David Ahern 
Cc: Frederic Weisbecker 
Cc: Ingo Molnar 
Cc: Jiri Olsa 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Cc: Steven Rostedt 
Link: http://lkml.kernel.org/r/1370323231-14022-7-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo