/usr/src/lttng-modules-2.7.1/wrapper/ftrace.h is in lttng-modules-dkms 2.7.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 | #ifndef _LTTNG_WRAPPER_FTRACE_H
#define _LTTNG_WRAPPER_FTRACE_H
/*
* wrapper/ftrace.h
*
* wrapper around vmalloc_sync_all. Using KALLSYMS to get its address when
* available, else we need to have a kernel that exports this function to GPL
* modules.
*
* Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; only
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/ftrace.h>
#ifdef CONFIG_KALLSYMS
#include <linux/kallsyms.h>
#include "kallsyms.h"
static inline
int wrapper_register_ftrace_function_probe(char *glob,
struct ftrace_probe_ops *ops, void *data)
{
int (*register_ftrace_function_probe_sym)(char *glob,
struct ftrace_probe_ops *ops, void *data);
register_ftrace_function_probe_sym = (void *) kallsyms_lookup_funcptr("register_ftrace_function_probe");
if (register_ftrace_function_probe_sym) {
return register_ftrace_function_probe_sym(glob, ops, data);
} else {
printk(KERN_WARNING "LTTng: register_ftrace_function_probe symbol lookup failed.\n");
return -EINVAL;
}
}
static inline
void wrapper_unregister_ftrace_function_probe(char *glob,
struct ftrace_probe_ops *ops, void *data)
{
void (*unregister_ftrace_function_probe_sym)(char *glob,
struct ftrace_probe_ops *ops, void *data);
unregister_ftrace_function_probe_sym = (void *) kallsyms_lookup_funcptr("unregister_ftrace_function_probe");
if (unregister_ftrace_function_probe_sym) {
unregister_ftrace_function_probe_sym(glob, ops, data);
} else {
printk(KERN_WARNING "LTTng: unregister_ftrace_function_probe symbol lookup failed.\n");
WARN_ON(1);
}
}
#else
static inline
int wrapper_register_ftrace_function_probe(char *glob,
struct ftrace_probe_ops *ops, void *data)
{
return register_ftrace_function_probe(glob, ops, data);
}
static inline
void wrapper_unregister_ftrace_function_probe(char *glob,
struct ftrace_probe_ops *ops, void *data)
{
return unregister_ftrace_function_probe(glob, ops, data);
}
#endif
#endif /* _LTTNG_WRAPPER_FTRACE_H */
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