fb34a08c34
Layer Frederic's syscall tracer on tracepoints. We create trace events via hooking into the SYSCALL_DEFINE macros. This allows us to individually toggle syscall entry and exit points on/off. 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
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#define _TRACE_SYSCALL_H
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#include <linux/tracepoint.h>
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#include <linux/unistd.h>
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#include <linux/ftrace_event.h>
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#include <asm/ptrace.h>
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extern void syscall_regfunc(void);
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extern void syscall_unregfunc(void);
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DECLARE_TRACE_WITH_CALLBACK(syscall_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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syscall_regfunc,
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syscall_unregfunc
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);
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DECLARE_TRACE_WITH_CALLBACK(syscall_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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syscall_regfunc,
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syscall_unregfunc
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);
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/*
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* A syscall entry in the ftrace syscalls array.
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*
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* @name: name of the syscall
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* @nb_args: number of parameters it takes
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* @types: list of types as strings
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* @args: list of args as strings (args[i] matches types[i])
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*/
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struct syscall_metadata {
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const char *name;
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int nb_args;
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const char **types;
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const char **args;
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};
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#ifdef CONFIG_FTRACE_SYSCALLS
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extern struct syscall_metadata *syscall_nr_to_meta(int nr);
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extern int syscall_name_to_nr(char *name);
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extern struct trace_event event_syscall_enter;
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extern struct trace_event event_syscall_exit;
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extern int reg_event_syscall_enter(void *ptr);
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extern void unreg_event_syscall_enter(void *ptr);
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extern int reg_event_syscall_exit(void *ptr);
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extern void unreg_event_syscall_exit(void *ptr);
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#endif
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#endif /* _TRACE_SYSCALL_H */
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