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Commit dbfeaa7a authored by Tom Zanussi's avatar Tom Zanussi Committed by Steven Rostedt
Browse files

tracing: Add get_syscall_name() 

Add a utility function to grab the syscall name from the syscall
metadata, given a syscall id.

Link: http://lkml.kernel.org/r/be26a8dfe3f15e16a837799f1c1e2b4d62742843.1449767187.git.tom.zanussi@linux.intel.com



Signed-off-by: default avatarTom Zanussi <tom.zanussi@linux.intel.com>
Tested-by: default avatarMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Reviewed-by: default avatarNamhyung Kim <namhyung@kernel.org>
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
parent c4a59230

kernel/trace/trace.h

+5 −0
Original line number Diff line number Diff line
@@ -1394,8 +1394,13 @@ int perf_ftrace_event_register(struct trace_event_call *call, 


#ifdef CONFIG_FTRACE_SYSCALLS

void init_ftrace_syscalls(void);

const char *get_syscall_name(int syscall);

#else

static inline void init_ftrace_syscalls(void) { }

static inline const char *get_syscall_name(int syscall)

{

	return NULL;

}

#endif



#ifdef CONFIG_EVENT_TRACING

kernel/trace/trace_syscalls.c

+11 −0
Original line number Diff line number Diff line
@@ -106,6 +106,17 @@ static struct syscall_metadata *syscall_nr_to_meta(int nr) 
	return syscalls_metadata[nr];

}



const char *get_syscall_name(int syscall)

{

	struct syscall_metadata *entry;



	entry = syscall_nr_to_meta(syscall);

	if (!entry)

		return NULL;



	return entry->name;

}



static enum print_line_t

print_syscall_enter(struct trace_iterator *iter, int flags,

		    struct trace_event *event)