instrumentation/events/lttng-module/module.h

   1 /*
   2  * Because linux/module.h has tracepoints in the header, and ftrace.h
   3  * eventually includes this file, define_trace.h includes linux/module.h
   4  * But we do not want the module.h to override the TRACE_SYSTEM macro
   5  * variable that define_trace.h is processing, so we only set it
   6  * when module events are being processed, which would happen when
   7  * CREATE_TRACE_POINTS is defined.
   8  */
   9 #ifdef CREATE_TRACE_POINTS
  10 #undef TRACE_SYSTEM
  11 #define TRACE_SYSTEM module
  12 #endif
  13
  14 #if !defined(LTTNG_TRACE_MODULE_H) || defined(TRACE_HEADER_MULTI_READ)
  15 #define LTTNG_TRACE_MODULE_H
  16
  17 #include "../../../probes/lttng-tracepoint-event.h"
  18 #include <linux/version.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 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
  57         TP_PROTO(struct module *mod, unsigned long ip),
  58
  59         TP_ARGS(mod, ip),
  60 #else
  61         TP_PROTO(struct module *mod, unsigned long ip, int refcnt),
  62
  63         TP_ARGS(mod, ip, refcnt),
  64 #endif
  65
  66         TP_FIELDS(
  67                 ctf_integer(unsigned long, ip, ip)
  68 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,0))
  69                 ctf_integer(int, refcnt, atomic_read(&mod->refcnt))
  70 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
  71                 ctf_integer(int, refcnt, __this_cpu_read(mod->refptr->incs) + __this_cpu_read(mod->refptr->decs))
  72 #else
  73                 ctf_integer(int, refcnt, refcnt)
  74 #endif
  75                 ctf_string(name, mod->name)
  76         )
  77 )
  78
  79 LTTNG_TRACEPOINT_EVENT_INSTANCE(module_refcnt, module_get,
  80
  81 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
  82         TP_PROTO(struct module *mod, unsigned long ip),
  83
  84         TP_ARGS(mod, ip)
  85 #else
  86         TP_PROTO(struct module *mod, unsigned long ip, int refcnt),
  87
  88         TP_ARGS(mod, ip, refcnt)
  89 #endif
  90 )
  91
  92 LTTNG_TRACEPOINT_EVENT_INSTANCE(module_refcnt, module_put,
  93
  94 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
  95         TP_PROTO(struct module *mod, unsigned long ip),
  96
  97         TP_ARGS(mod, ip)
  98 #else
  99         TP_PROTO(struct module *mod, unsigned long ip, int refcnt),
 100
 101         TP_ARGS(mod, ip, refcnt)
 102 #endif
 103 )
 104 #endif /* CONFIG_MODULE_UNLOAD */
 105
 106 LTTNG_TRACEPOINT_EVENT(module_request,
 107
 108         TP_PROTO(char *name, bool wait, unsigned long ip),
 109
 110         TP_ARGS(name, wait, ip),
 111
 112         TP_FIELDS(
 113                 ctf_integer(unsigned long, ip, ip)
 114                 ctf_integer(bool, wait, wait)
 115                 ctf_string(name, name)
 116         )
 117 )
 118
 119 #endif /* CONFIG_MODULES */
 120
 121 #endif /* LTTNG_TRACE_MODULE_H */
 122
 123 /* This part must be outside protection */
 124 #include "../../../probes/define_trace.h"