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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2009-03-07 05:52:59 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-03-13 06:25:43 +0100 |
| commit | ee08c6eccb7d1295516f7cf420fddf7b14e9146f (patch) | |
| tree | ec6d209e47bb1a8910d16c1c8b4ea65959850689 /include/linux/ftrace.h | |
| parent | 4c6ed8f496fe89ff81b3d6e617a531bedfb613e4 (diff) | |
| download | lwn-ee08c6eccb7d1295516f7cf420fddf7b14e9146f.tar.gz lwn-ee08c6eccb7d1295516f7cf420fddf7b14e9146f.zip | |
tracing/ftrace: syscall tracing infrastructure, basics
Provide basic callbacks to do syscall tracing.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
LKML-Reference: <1236401580-5758-2-git-send-email-fweisbec@gmail.com>
[ simplified it to a trace_printk() for now. ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/ftrace.h')
| -rw-r--r-- | include/linux/ftrace.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h index e1583f2639b0..c146c1021a29 100644 --- a/include/linux/ftrace.h +++ b/include/linux/ftrace.h @@ -503,4 +503,25 @@ static inline void trace_hw_branch_oops(void) {} #endif /* CONFIG_HW_BRANCH_TRACER */ +/* + * A syscall entry in the ftrace syscalls array. + * + * @syscall_nr: syscall number + */ +struct syscall_trace_entry { + int syscall_nr; +}; + +#ifdef CONFIG_FTRACE_SYSCALLS +extern void start_ftrace_syscalls(void); +extern void stop_ftrace_syscalls(void); +extern void ftrace_syscall_enter(struct pt_regs *regs); +extern void ftrace_syscall_exit(struct pt_regs *regs); +#else +static inline void start_ftrace_syscalls(void) { } +static inline void stop_ftrace_syscalls(void) { } +static inline void ftrace_syscall_enter(struct pt_regs *regs) { } +static inline void ftrace_syscall_exit(struct pt_regs *regs) { } +#endif + #endif /* _LINUX_FTRACE_H */ |