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

 #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

@@ -106,6 +106,17 @@ static struct syscall_metadata *syscall_nr_to_meta(int nr) · 105 unmodified lines
106	return syscalls_metadata[nr];	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	static enum print_line_t	120	static enum print_line_t
110	print_syscall_enter(struct trace_iterator *iter, int flags,	121	print_syscall_enter(struct trace_iterator *iter, int flags,
111	struct trace_event *event)	122	struct trace_event *event)

tracing: Add get_syscall_name()

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