diff options
Diffstat (limited to 'kernel/trace/trace_events.h')
| -rw-r--r-- | kernel/trace/trace_events.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/kernel/trace/trace_events.h b/kernel/trace/trace_events.h new file mode 100644 index 00000000000..cb8455b3ac9 --- /dev/null +++ b/kernel/trace/trace_events.h @@ -0,0 +1,55 @@ +#ifndef _LINUX_KERNEL_TRACE_EVENTS_H +#define _LINUX_KERNEL_TRACE_EVENTS_H + +#include <linux/debugfs.h> +#include <linux/ftrace.h> +#include "trace.h" + +struct ftrace_event_call { + char *name; + struct dentry *dir; + int enabled; + int (*regfunc)(void); + void (*unregfunc)(void); +}; + + +#undef TPFMT +#define TPFMT(fmt, args...) fmt "\n", ##args + +#undef DEFINE_TRACE_FMT +#define DEFINE_TRACE_FMT(call, proto, args, fmt) \ +static void ftrace_event_##call(proto) \ +{ \ + event_trace_printk(_RET_IP_, "(" #call ") " fmt); \ +} \ + \ +static int ftrace_reg_event_##call(void) \ +{ \ + int ret; \ + \ + ret = register_trace_##call(ftrace_event_##call); \ + if (!ret) \ + pr_info("event trace: Could not activate trace point " \ + "probe to " #call); \ + return ret; \ +} \ + \ +static void ftrace_unreg_event_##call(void) \ +{ \ + unregister_trace_##call(ftrace_event_##call); \ +} \ + \ +static struct ftrace_event_call __used \ +__attribute__((__aligned__(4))) \ +__attribute__((section("_ftrace_events"))) event_##call = { \ + .name = #call, \ + .regfunc = ftrace_reg_event_##call, \ + .unregfunc = ftrace_unreg_event_##call, \ +} + +void event_trace_printk(unsigned long ip, const char *fmt, ...); +extern struct ftrace_event_call __start_ftrace_events[]; +extern struct ftrace_event_call __stop_ftrace_events[]; + +#endif /* _LINUX_KERNEL_TRACE_EVENTS_H */ |