mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-26 20:44:32 +08:00
a871bd33a6
add two tracepoints in syscall exit and entry path, conditioned on TIF_SYSCALL_FTRACE. Supports the syscall trace event code. Signed-off-by: Jason Baron <jbaron@redhat.com> Cc: Lai Jiangshan <laijs@cn.fujitsu.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Jiaying Zhang <jiayingz@google.com> Cc: Martin Bligh <mbligh@google.com> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Masami Hiramatsu <mhiramat@redhat.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
55 lines
1.3 KiB
C
55 lines
1.3 KiB
C
#ifndef _TRACE_SYSCALL_H
|
|
#define _TRACE_SYSCALL_H
|
|
|
|
#include <linux/tracepoint.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])
|
|
*/
|
|
struct syscall_metadata {
|
|
const char *name;
|
|
int nb_args;
|
|
const char **types;
|
|
const char **args;
|
|
};
|
|
|
|
#ifdef CONFIG_FTRACE_SYSCALLS
|
|
extern struct syscall_metadata *syscall_nr_to_meta(int nr);
|
|
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 /* _TRACE_SYSCALL_H */
|