xserver-multidpi/dix/Xserver.d
Peter Hutterer c0b0a9bce9 dix: add dtrace probes to input API
For driver debugging, it is helpful to know whether the driver has actually
submitted an event to the server. dtrace hooks can help here.

Note that GetPointerEvents and friends may also be triggered by the server
for other emulated devices, some care must be taken when analysing the
results.

Additional difficulty: proximity events have a run-time assigned type, so
this may make automatic detection a tad harder. If in doubt, go for any
event > 64 since the only two that can have that value are ProximityIn and
ProximityOut.

An example systemtap script is below:

  # Compile+run with
  #       stap -g xorg.stp /usr/bin/Xorg
  #

  function print_valuators:string(nvaluators:long, mask_in:long, valuators_in:long) %{
          int i;
          unsigned char *mask = (unsigned char*)THIS->mask_in;
          double *valuators = (double*)THIS->valuators_in;
          char str[128] = {0};
          char *s = str;

  #define BitIsSet(ptr, bit) (((unsigned char*)(ptr))[(bit)>>3] & (1 << ((bit) & 7)))

          s += sprintf(s, "nval: %d ::", (int)THIS->nvaluators);
          for (i = 0; i < THIS->nvaluators; i++)
          {
                  s += sprintf(s, "	%d: ", i);
                  if (BitIsSet(mask, i))
                      s += sprintf(s, "%d", (int)valuators[i]);
          }

          sprintf(THIS->__retvalue, "%s", str);
  %}

  probe process(@1).mark("input__event")
  {
      deviceid = $arg1
      type = $arg2
      detail = $arg3
      flags = $arg4
      nvaluators = $arg5

      str = print_valuators(nvaluators, $arg6, $arg7)
      printf("Event: device %d type %d detail %d flags %#x %s\n",
              deviceid, type, detail, flags, str);
  }

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Acked-by: Jeremy Huddleston <jeremyhu@apple.com>
2012-03-22 11:33:42 +10:00

61 lines
2.6 KiB
D

/* Copyright (c) 2005-2006, Oracle and/or its affiliates. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
/*
* Xserver dtrace provider definition
*/
#ifdef __APPLE__
#define string char *
#define pid_t uint32_t
#define zoneid_t uint32_t
#else
#include <sys/types.h>
#endif
provider Xserver {
/* reqType, data, length, client id, request buffer */
probe request__start(string, uint8_t, uint16_t, int, void *);
/* reqType, data, sequence, client id, result */
probe request__done(string, uint8_t, uint32_t, int, int);
/* client id, client fd */
probe client__connect(int, int);
/* client id, client address, client pid, client zone id */
probe client__auth(int, string, pid_t, zoneid_t);
/* client id */
probe client__disconnect(int);
/* resource id, resource type, value, resource type name */
probe resource__alloc(uint32_t, uint32_t, void *, string);
/* resource id, resource type, value, resource type name */
probe resource__free(uint32_t, uint32_t, void *, string);
/* client id, event type, event* */
probe send__event(int, uint8_t, void *);
/* deviceid, type, button/keycode/touchid, flags, nvalues, mask, values */
probe input__event(int, int, uint32_t, uint32_t, int8_t, uint8_t*, double*);
};
#pragma D attributes Unstable/Unstable/Common provider Xserver provider
#pragma D attributes Private/Private/Unknown provider Xserver module
#pragma D attributes Private/Private/Unknown provider Xserver function
#pragma D attributes Unstable/Unstable/Common provider Xserver name
#pragma D attributes Unstable/Unstable/Common provider Xserver args