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_STRUCT__entry(
  35                 __field(        unsigned int,   taints          )
  36                 __string(       name,           mod->name       )
  37         ),
  38
  39         TP_fast_assign(
  40                 tp_assign(taints, mod->taints)
  41                 tp_strcpy(name, mod->name)
  42         ),
  43
  44         TP_printk("%s %s", __get_str(name), show_module_flags(__entry->taints))
  45 )
  46
  47 LTTNG_TRACEPOINT_EVENT(module_free,
  48
  49         TP_PROTO(struct module *mod),
  50
  51         TP_ARGS(mod),
  52
  53         TP_STRUCT__entry(
  54                 __string(       name,           mod->name       )
  55         ),
  56
  57         TP_fast_assign(
  58                 tp_strcpy(name, mod->name)
  59         ),
  60
  61         TP_printk("%s", __get_str(name))
  62 )
  63
  64 #ifdef CONFIG_MODULE_UNLOAD
  65 /* trace_module_get/put are only used if CONFIG_MODULE_UNLOAD is defined */
  66
  67 LTTNG_TRACEPOINT_EVENT_CLASS(module_refcnt,
  68
  69 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
  70         TP_PROTO(struct module *mod, unsigned long ip),
  71
  72         TP_ARGS(mod, ip),
  73 #else
  74         TP_PROTO(struct module *mod, unsigned long ip, int refcnt),
  75
  76         TP_ARGS(mod, ip, refcnt),
  77 #endif
  78
  79         TP_STRUCT__entry(
  80                 __field(        unsigned long,  ip              )
  81                 __field(        int,            refcnt          )
  82                 __string(       name,           mod->name       )
  83         ),
  84
  85         TP_fast_assign(
  86                 tp_assign(ip, ip)
  87 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,0))
  88                 tp_assign(refcnt, atomic_read(&mod->refcnt))
  89 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
  90                 tp_assign(refcnt, __this_cpu_read(mod->refptr->incs) + __this_cpu_read(mod->refptr->decs))
  91 #else
  92                 tp_assign(refcnt, refcnt)
  93 #endif
  94                 tp_strcpy(name, mod->name)
  95         ),
  96
  97         TP_printk("%s call_site=%pf refcnt=%d",
  98                   __get_str(name), (void *)__entry->ip, __entry->refcnt)
  99 )
 100
 101 LTTNG_TRACEPOINT_EVENT_INSTANCE(module_refcnt, module_get,
 102
 103 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
 104         TP_PROTO(struct module *mod, unsigned long ip),
 105
 106         TP_ARGS(mod, ip)
 107 #else
 108         TP_PROTO(struct module *mod, unsigned long ip, int refcnt),
 109
 110         TP_ARGS(mod, ip, refcnt)
 111 #endif
 112 )
 113
 114 LTTNG_TRACEPOINT_EVENT_INSTANCE(module_refcnt, module_put,
 115
 116 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
 117         TP_PROTO(struct module *mod, unsigned long ip),
 118
 119         TP_ARGS(mod, ip)
 120 #else
 121         TP_PROTO(struct module *mod, unsigned long ip, int refcnt),
 122
 123         TP_ARGS(mod, ip, refcnt)
 124 #endif
 125 )
 126 #endif /* CONFIG_MODULE_UNLOAD */
 127
 128 LTTNG_TRACEPOINT_EVENT(module_request,
 129
 130         TP_PROTO(char *name, bool wait, unsigned long ip),
 131
 132         TP_ARGS(name, wait, ip),
 133
 134         TP_STRUCT__entry(
 135                 __field(        unsigned long,  ip              )
 136                 __field(        bool,           wait            )
 137                 __string(       name,           name            )
 138         ),
 139
 140         TP_fast_assign(
 141                 tp_assign(ip, ip)
 142                 tp_assign(wait, wait)
 143                 tp_strcpy(name, name)
 144         ),
 145
 146         TP_printk("%s wait=%d call_site=%pf",
 147                   __get_str(name), (int)__entry->wait, (void *)__entry->ip)
 148 )
 149
 150 #endif /* CONFIG_MODULES */
 151
 152 #endif /* LTTNG_TRACE_MODULE_H */
 153
 154 /* This part must be outside protection */
 155 #include "../../../probes/define_trace.h"