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authorLi Zefan <lizf@cn.fujitsu.com>2009-08-19 15:53:05 +0800
committerIngo Molnar <mingo@elte.hu>2009-08-19 15:02:23 +0200
commit10a5b66f625904ad5a2867cf7a28073e1236ff32 (patch)
tree165c3d0f480e2862d3d97f3f3ceecad9c1cdc8b8 /kernel/trace
parente6971969c331caa5c3c88cbd1be4f465b3355452 (diff)
tracing/syscalls: Add fields format for exit events
Add "format" file for syscall exit events: # cat events/syscalls/sys_exit_open/format name: sys_exit_open ID: 344 format: field:unsigned short common_type; offset:0; size:2; field:unsigned char common_flags; offset:2; size:1; field:unsigned char common_preempt_count; offset:3; size:1; field:int common_pid; offset:4; size:4; field:int common_tgid; offset:8; size:4; field:int nr; offset:12; size:4; field:unsigned long ret; offset:16; size:4; Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Jason Baron <jbaron@redhat.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <4A8BAF61.3060307@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace')
-rw-r--r--kernel/trace/trace_syscalls.c18
1 files changed, 17 insertions, 1 deletions
diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
index d10daf0922b..7336b6c265d 100644
--- a/kernel/trace/trace_syscalls.c
+++ b/kernel/trace/trace_syscalls.c
@@ -97,7 +97,7 @@ extern char *__bad_type_size(void);
__bad_type_size() : \
#type, #name, offsetof(typeof(trace), name), sizeof(trace.name)
-int ftrace_format_syscall(struct ftrace_event_call *call, struct trace_seq *s)
+int syscall_enter_format(struct ftrace_event_call *call, struct trace_seq *s)
{
int i;
int nr;
@@ -149,6 +149,22 @@ int ftrace_format_syscall(struct ftrace_event_call *call, struct trace_seq *s)
return ret;
}
+int syscall_exit_format(struct ftrace_event_call *call, struct trace_seq *s)
+{
+ int ret;
+ struct syscall_trace_exit trace;
+
+ ret = trace_seq_printf(s,
+ "\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n"
+ "\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n",
+ SYSCALL_FIELD(int, nr),
+ SYSCALL_FIELD(unsigned long, ret));
+ if (!ret)
+ return 0;
+
+ return trace_seq_printf(s, "\nprint fmt: \"0x%%lx\", REC->ret\n");
+}
+
void ftrace_syscall_enter(struct pt_regs *regs, long id)
{
struct syscall_trace_enter *entry;