include/instrumentation/events/lttng-module/module.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Because linux/module.h has tracepoints in the header, and ftrace.h
   4  * eventually includes this file, define_trace.h includes linux/module.h
   5  * But we do not want the module.h to override the TRACE_SYSTEM macro
   6  * variable that define_trace.h is processing, so we only set it
   7  * when module events are being processed, which would happen when
   8  * CREATE_TRACE_POINTS is defined.
   9  */
  10 #ifdef CREATE_TRACE_POINTS
  11 #undef TRACE_SYSTEM
  12 #define TRACE_SYSTEM module
  13 #endif
  14
  15 #if !defined(LTTNG_TRACE_MODULE_H) || defined(TRACE_HEADER_MULTI_READ)
  16 #define LTTNG_TRACE_MODULE_H
  17
  18 #include <lttng/lttng-tracepoint-event.h>
  19
  20 #ifdef CONFIG_MODULES
  21
  22 #ifndef _TRACE_MODULE_DEF
  23 #define _TRACE_MODULE_DEF
  24 struct module;
  25
  26 #endif
  27
  28 LTTNG_TRACEPOINT_EVENT(module_load,
  29
  30         TP_PROTO(struct module *mod),
  31
  32         TP_ARGS(mod),
  33
  34         TP_FIELDS(
  35                 ctf_integer(unsigned int, taints, mod->taints)
  36                 ctf_string(name, mod->name)
  37         )
  38 )
  39
  40 LTTNG_TRACEPOINT_EVENT(module_free,
  41
  42         TP_PROTO(struct module *mod),
  43
  44         TP_ARGS(mod),
  45
  46         TP_FIELDS(
  47                 ctf_string(name, mod->name)
  48         )
  49 )
  50
  51 #ifdef CONFIG_MODULE_UNLOAD
  52 /* trace_module_get/put are only used if CONFIG_MODULE_UNLOAD is defined */
  53
  54 LTTNG_TRACEPOINT_EVENT_CLASS(module_refcnt,
  55
  56         TP_PROTO(struct module *mod, unsigned long ip),
  57
  58         TP_ARGS(mod, ip),
  59
  60         TP_FIELDS(
  61                 ctf_integer_hex(unsigned long, ip, ip)
  62                 ctf_integer(int, refcnt, atomic_read(&mod->refcnt))
  63                 ctf_string(name, mod->name)
  64         )
  65 )
  66
  67 LTTNG_TRACEPOINT_EVENT_INSTANCE(module_refcnt, module_get,
  68
  69         TP_PROTO(struct module *mod, unsigned long ip),
  70
  71         TP_ARGS(mod, ip)
  72 )
  73
  74 LTTNG_TRACEPOINT_EVENT_INSTANCE(module_refcnt, module_put,
  75
  76         TP_PROTO(struct module *mod, unsigned long ip),
  77
  78         TP_ARGS(mod, ip)
  79 )
  80 #endif /* CONFIG_MODULE_UNLOAD */
  81
  82 LTTNG_TRACEPOINT_EVENT(module_request,
  83
  84         TP_PROTO(char *name, bool wait, unsigned long ip),
  85
  86         TP_ARGS(name, wait, ip),
  87
  88         TP_FIELDS(
  89                 ctf_integer_hex(unsigned long, ip, ip)
  90                 ctf_integer(bool, wait, wait)
  91                 ctf_string(name, name)
  92         )
  93 )
  94
  95 #endif /* CONFIG_MODULES */
  96
  97 #endif /* LTTNG_TRACE_MODULE_H */
  98
  99 /* This part must be outside protection */
 100 #include <lttng/define_trace.h>