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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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fe5542030d
This allows non privileged users to use the raw syscall trace events for task bound tracing in perf. It is safe because raw syscall trace events don't leak system wide informations. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Jason Baron <jbaron@redhat.com>
75 lines
1.5 KiB
C
75 lines
1.5 KiB
C
#undef TRACE_SYSTEM
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#define TRACE_SYSTEM raw_syscalls
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#define TRACE_INCLUDE_FILE syscalls
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#if !defined(_TRACE_EVENTS_SYSCALLS_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_EVENTS_SYSCALLS_H
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#include <linux/tracepoint.h>
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#include <asm/ptrace.h>
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#include <asm/syscall.h>
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#ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS
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extern void syscall_regfunc(void);
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extern void syscall_unregfunc(void);
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TRACE_EVENT_FN(sys_enter,
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TP_PROTO(struct pt_regs *regs, long id),
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TP_ARGS(regs, id),
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TP_STRUCT__entry(
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__field( long, id )
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__array( unsigned long, args, 6 )
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),
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TP_fast_assign(
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__entry->id = id;
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syscall_get_arguments(current, regs, 0, 6, __entry->args);
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),
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TP_printk("NR %ld (%lx, %lx, %lx, %lx, %lx, %lx)",
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__entry->id,
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__entry->args[0], __entry->args[1], __entry->args[2],
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__entry->args[3], __entry->args[4], __entry->args[5]),
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syscall_regfunc, syscall_unregfunc
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);
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TRACE_EVENT_FLAGS(sys_enter, TRACE_EVENT_FL_CAP_ANY)
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TRACE_EVENT_FN(sys_exit,
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TP_PROTO(struct pt_regs *regs, long ret),
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TP_ARGS(regs, ret),
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TP_STRUCT__entry(
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__field( long, id )
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__field( long, ret )
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),
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TP_fast_assign(
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__entry->id = syscall_get_nr(current, regs);
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__entry->ret = ret;
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),
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TP_printk("NR %ld = %ld",
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__entry->id, __entry->ret),
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syscall_regfunc, syscall_unregfunc
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);
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TRACE_EVENT_FLAGS(sys_exit, TRACE_EVENT_FL_CAP_ANY)
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#endif /* CONFIG_HAVE_SYSCALL_TRACEPOINTS */
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#endif /* _TRACE_EVENTS_SYSCALLS_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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