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

Tom Zanussi committed 10 years ago

Commit dbfeaa71 parent c4a59232 files · +16 −0Browse files

Showing the changes to kernel/trace (2 of 2 files). Show all

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2 files

kernel/trace/trace.h +5 −0
kernel/trace/trace_syscalls.c +11 −0

kernel/trace/trace.h+5−0

@@ -1394,8 +1394,13 @@ int perf_ftrace_event_register(struct trace_event_call *call, · 1393 unmodified lines
1394	1394
1395	1395	#ifdef CONFIG_FTRACE_SYSCALLS
1396	1396	void init_ftrace_syscalls(void);
	1397	+const char *get_syscall_name(int syscall);
1397	1398	#else
1398	1399	static inline void init_ftrace_syscalls(void) { }
	1400	+static inline const char *get_syscall_name(int syscall)
	1401	+{
	1402	+ return NULL;
	1403	+}
1399	1404	#endif
1400	1405
1401	1406	#ifdef CONFIG_EVENT_TRACING

kernel/trace/trace_syscalls.c+11−0

@@ -106,6 +106,17 @@ static struct syscall_metadata *syscall_nr_to_meta(int nr) · 105 unmodified lines
106	106	return syscalls_metadata[nr];
107	107	}
108	108
	109	+const char *get_syscall_name(int syscall)
	110	+{
	111	+ struct syscall_metadata *entry;
	112	+
	113	+ entry = syscall_nr_to_meta(syscall);
	114	+ if (!entry)
	115	+ return NULL;
	116	+
	117	+ return entry->name;
	118	+}
	119	+
109	120	static enum print_line_t
110	121	print_syscall_enter(struct trace_iterator *iter, int flags,
111	122	struct trace_event *event)

tracing: Add get_syscall_name()

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