540b7b8d65
Add filtering support for syscall events:
# echo 'mode == 0666' > events/syscalls/sys_enter_open
# echo 'ret == 0' > events/syscalls/sys_exit_open
# echo 1 > events/syscalls/sys_enter_open
# echo 1 > events/syscalls/sys_exit_open
# cat trace
...
modprobe-3084 [001] 117.463140: sys_open(filename: 917d3e8, flags: 0, mode: 1b6)
modprobe-3084 [001] 117.463176: sys_open -> 0x0
less-3086 [001] 117.510455: sys_open(filename: 9c6bdb8, flags: 8000, mode: 1b6)
sendmail-2574 [001] 122.145840: sys_open(filename: b807a365, flags: 0, mode: 1b6)
...
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: <4A8BAFCB.1040006@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
80 lines
2.3 KiB
C
80 lines
2.3 KiB
C
#ifndef _TRACE_SYSCALL_H
|
|
#define _TRACE_SYSCALL_H
|
|
|
|
#include <linux/tracepoint.h>
|
|
#include <linux/unistd.h>
|
|
#include <linux/ftrace_event.h>
|
|
|
|
#include <asm/ptrace.h>
|
|
|
|
|
|
extern void syscall_regfunc(void);
|
|
extern void syscall_unregfunc(void);
|
|
|
|
DECLARE_TRACE_WITH_CALLBACK(syscall_enter,
|
|
TP_PROTO(struct pt_regs *regs, long id),
|
|
TP_ARGS(regs, id),
|
|
syscall_regfunc,
|
|
syscall_unregfunc
|
|
);
|
|
|
|
DECLARE_TRACE_WITH_CALLBACK(syscall_exit,
|
|
TP_PROTO(struct pt_regs *regs, long ret),
|
|
TP_ARGS(regs, ret),
|
|
syscall_regfunc,
|
|
syscall_unregfunc
|
|
);
|
|
|
|
/*
|
|
* A syscall entry in the ftrace syscalls array.
|
|
*
|
|
* @name: name of the syscall
|
|
* @nb_args: number of parameters it takes
|
|
* @types: list of types as strings
|
|
* @args: list of args as strings (args[i] matches types[i])
|
|
* @enter_id: associated ftrace enter event id
|
|
* @exit_id: associated ftrace exit event id
|
|
* @enter_event: associated syscall_enter trace event
|
|
* @exit_event: associated syscall_exit trace event
|
|
*/
|
|
struct syscall_metadata {
|
|
const char *name;
|
|
int nb_args;
|
|
const char **types;
|
|
const char **args;
|
|
int enter_id;
|
|
int exit_id;
|
|
|
|
struct ftrace_event_call *enter_event;
|
|
struct ftrace_event_call *exit_event;
|
|
};
|
|
|
|
#ifdef CONFIG_FTRACE_SYSCALLS
|
|
extern struct syscall_metadata *syscall_nr_to_meta(int nr);
|
|
extern int syscall_name_to_nr(char *name);
|
|
void set_syscall_enter_id(int num, int id);
|
|
void set_syscall_exit_id(int num, int id);
|
|
extern struct trace_event event_syscall_enter;
|
|
extern struct trace_event event_syscall_exit;
|
|
extern int reg_event_syscall_enter(void *ptr);
|
|
extern void unreg_event_syscall_enter(void *ptr);
|
|
extern int reg_event_syscall_exit(void *ptr);
|
|
extern void unreg_event_syscall_exit(void *ptr);
|
|
extern int syscall_enter_format(struct ftrace_event_call *call,
|
|
struct trace_seq *s);
|
|
extern int syscall_exit_format(struct ftrace_event_call *call,
|
|
struct trace_seq *s);
|
|
extern int syscall_enter_define_fields(struct ftrace_event_call *call);
|
|
extern int syscall_exit_define_fields(struct ftrace_event_call *call);
|
|
enum print_line_t print_syscall_enter(struct trace_iterator *iter, int flags);
|
|
enum print_line_t print_syscall_exit(struct trace_iterator *iter, int flags);
|
|
#endif
|
|
#ifdef CONFIG_EVENT_PROFILE
|
|
int reg_prof_syscall_enter(char *name);
|
|
void unreg_prof_syscall_enter(char *name);
|
|
int reg_prof_syscall_exit(char *name);
|
|
void unreg_prof_syscall_exit(char *name);
|
|
|
|
#endif
|
|
|
|
#endif /* _TRACE_SYSCALL_H */
|