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(_TRACE_MODULE_H) || defined(TRACE_HEADER_MULTI_READ)
  15 #define _TRACE_MODULE_H
  16
  17 #include <linux/tracepoint.h>
  18
  19 #ifdef CONFIG_MODULES
  20
  21 #ifndef _TRACE_MODULE_DEF
  22 #define _TRACE_MODULE_DEF
  23 struct module;
  24
  25 #define show_module_flags(flags) __print_flags(flags, "",       \
  26         { (1UL << TAINT_PROPRIETARY_MODULE),    "P" },          \
  27         { (1UL << TAINT_FORCED_MODULE),         "F" },          \
  28         { (1UL << TAINT_CRAP),                  "C" })
  29 #endif
  30
  31 TRACE_EVENT(module_load,
  32
  33         TP_PROTO(struct module *mod),
  34
  35         TP_ARGS(mod),
  36
  37         TP_STRUCT__entry(
  38                 __field(        unsigned int,   taints          )
  39                 __string(       name,           mod->name       )
  40         ),
  41
  42         TP_fast_assign(
  43                 tp_assign(taints, mod->taints);
  44                 tp_strcpy(name, mod->name);
  45         ),
  46
  47         TP_printk("%s %s", __get_str(name), show_module_flags(__entry->taints))
  48 )
  49
  50 TRACE_EVENT(module_free,
  51
  52         TP_PROTO(struct module *mod),
  53
  54         TP_ARGS(mod),
  55
  56         TP_STRUCT__entry(
  57                 __string(       name,           mod->name       )
  58         ),
  59
  60         TP_fast_assign(
  61                 tp_strcpy(name, mod->name);
  62         ),
  63
  64         TP_printk("%s", __get_str(name))
  65 )
  66
  67 #ifdef CONFIG_MODULE_UNLOAD
  68 /* trace_module_get/put are only used if CONFIG_MODULE_UNLOAD is defined */
  69
  70 DECLARE_EVENT_CLASS(module_refcnt,
  71
  72         TP_PROTO(struct module *mod, unsigned long ip),
  73
  74         TP_ARGS(mod, ip),
  75
  76         TP_STRUCT__entry(
  77                 __field(        unsigned long,  ip              )
  78                 __field(        int,            refcnt          )
  79                 __string(       name,           mod->name       )
  80         ),
  81
  82         TP_fast_assign(
  83                 tp_assign(ip, ip);
  84                 tp_assign(refcnt, __this_cpu_read(mod->refptr->incs) + __this_cpu_read(mod->refptr->decs));
  85                 tp_strcpy(name, mod->name);
  86         ),
  87
  88         TP_printk("%s call_site=%pf refcnt=%d",
  89                   __get_str(name), (void *)__entry->ip, __entry->refcnt)
  90 )
  91
  92 DEFINE_EVENT(module_refcnt, module_get,
  93
  94         TP_PROTO(struct module *mod, unsigned long ip),
  95
  96         TP_ARGS(mod, ip)
  97 )
  98
  99 DEFINE_EVENT(module_refcnt, module_put,
 100
 101         TP_PROTO(struct module *mod, unsigned long ip),
 102
 103         TP_ARGS(mod, ip)
 104 )
 105 #endif /* CONFIG_MODULE_UNLOAD */
 106
 107 TRACE_EVENT(module_request,
 108
 109         TP_PROTO(char *name, bool wait, unsigned long ip),
 110
 111         TP_ARGS(name, wait, ip),
 112
 113         TP_STRUCT__entry(
 114                 __field(        unsigned long,  ip              )
 115                 __field(        bool,           wait            )
 116                 __string(       name,           name            )
 117         ),
 118
 119         TP_fast_assign(
 120                 tp_assign(ip, ip);
 121                 tp_assign(wait, wait);
 122                 tp_strcpy(name, name);
 123         ),
 124
 125         TP_printk("%s wait=%d call_site=%pf",
 126                   __get_str(name), (int)__entry->wait, (void *)__entry->ip)
 127 )
 128
 129 #endif /* CONFIG_MODULES */
 130
 131 #endif /* _TRACE_MODULE_H */
 132
 133 /* This part must be outside protection */
 134 #include "../../../probes/define_trace.h"