[Bug translator/19396] New: systemtap can't find certain kernel tracepoints

["dsmith at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=19396

            Bug ID: 19396
           Summary: systemtap can't find certain kernel tracepoints
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: translator
          Assignee: systemtap at sourceware dot org
          Reporter: dsmith at redhat dot com
  Target Milestone: ---

Commit 7649bb8 updated the support for finding kernel tracepoints. However,
even with this commit, systemtap still can't find certain kernel tracepoints.
There is a script, in src/scripts/tracepoint-diff that points this out.

Here are the missing tracepoints, listed by OS.

RHEL6 (2.6.32-573.3.1.el6.x86_64):

module:module_free
module:module_get
module:module_load
module:module_put
module:module_request
napi:napi_poll
net:net_dev_queue
net:net_dev_xmit
net:netif_receive_skb
net:netif_rx
skb:consume_skb
skb:kfree_skb
skb:skb_copy_datagram_iovec
sock:sock_exceed_buf_limit
sock:sock_rcvqueue_full
udp:udp_fail_queue_rcv_skb

RHEL7 (3.10.0-327.el7.x86_64):

ftrace:function
hda:hda_get_response
hda:hda_send_cmd
hda:hda_unsol_event
module:module_free
module:module_get
module:module_load
module:module_put
module:module_request
xfs:* (353 total xfs tracepoints)

Fedora 23 (4.2.7-300.fc23.x86_64):

ftrace:function
hda:hda_get_response
hda:hda_send_cmd
hda:hda_unsol_event
hda:snd_hdac_stream_start
hda:snd_hdac_stream_stop
module:module_free
module:module_get
module:module_load
module:module_put
module:module_request
regmap:regcache_drop_region
regmap:regcache_sync
regmap:regmap_async_complete_done
regmap:regmap_async_complete_start
regmap:regmap_async_io_complete
regmap:regmap_async_write_start
regmap:regmap_cache_bypass
regmap:regmap_cache_only
regmap:regmap_hw_read_done
regmap:regmap_hw_read_start
regmap:regmap_hw_write_done
regmap:regmap_hw_write_start
regmap:regmap_reg_read
regmap:regmap_reg_read_cache
regmap:regmap_reg_write
snd_pcm:hwptr
snd_pcm:hw_ptr_error
snd_pcm:xrun
vsyscall:emulate_vsyscall
xfs:* (359 total xfs tracepoints)

Fedora Rawhide (4.4.0-0.rc4.git4.1.fc24.x86_64):

ftrace:function
hda:hda_get_response
hda:hda_send_cmd
hda:hda_unsol_event
hda:snd_hdac_stream_start
hda:snd_hdac_stream_stop
module:module_free
module:module_get
module:module_load
module:module_put
module:module_request
regmap:regcache_drop_region
regmap:regcache_sync
regmap:regmap_async_complete_done
regmap:regmap_async_complete_start
regmap:regmap_async_io_complete
regmap:regmap_async_write_start
regmap:regmap_cache_bypass
regmap:regmap_cache_only
regmap:regmap_hw_read_done
regmap:regmap_hw_read_start
regmap:regmap_hw_write_done
regmap:regmap_hw_write_start
regmap:regmap_reg_read
regmap:regmap_reg_read_cache
regmap:regmap_reg_write
snd_pcm:hwptr
snd_pcm:hw_ptr_error
snd_pcm:xrun
vsyscall:emulate_vsyscall

We need to convert the 'tracepoint-diff' script to a test case, so we can know
when systemtap can't find a set of tracepoints.

I've debugged this issue somewhat, and the missing xfs tracepoints are because
we need to add a '-I DIR' gcc option to compiles.

-- 
You are receiving this mail because:
You are the assignee for the bug.