lkml.org 
[lkml]   [2015]   [Apr]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v4 3/7] tracing: Add get_syscall_name()
Date
Add a utility function to grab the syscall name from the syscall
metadata, given a syscall id.

Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
---
kernel/trace/trace.h | 5 +++++
kernel/trace/trace_syscalls.c | 11 +++++++++++
2 files changed, 16 insertions(+)

diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 89dd87a..3d38c2e 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -1317,8 +1317,13 @@ int perf_ftrace_event_register(struct ftrace_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
diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
index f97f6e3..d137e0a 100644
--- a/kernel/trace/trace_syscalls.c
+++ b/kernel/trace/trace_syscalls.c
@@ -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)
--
1.9.3


\
 
 \ /
  Last update: 2015-04-10 18:41    [W:0.090 / U:11.624 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site