projects/linux·blob master · refs

86 lines · 1.8 KiB

1// SPDX-License-Identifier: GPL-2.0
2
3#include <linux/export.h>
4#include <linux/kernel.h>
5#include <linux/mutex.h>
6#include "gcov.h"
7
8/*
9 * __gcov_init is called by gcc-generated constructor code for each object
10 * file compiled with -fprofile-arcs.
11 */
12void __gcov_init(struct gcov_info *info)
13{
14 static unsigned int gcov_version;
15
16 mutex_lock(&gcov_lock);
17 if (gcov_version == 0) {
18 gcov_version = gcov_info_version(info);
19 /*
20 * Printing gcc's version magic may prove useful for debugging
21 * incompatibility reports.
22 */
23 pr_info("version magic: 0x%x\n", gcov_version);
24 }
25 /*
26 * Add new profiling data structure to list and inform event
27 * listener.
28 */
29 gcov_info_link(info);
30 if (gcov_events_enabled)
31 gcov_event(GCOV_ADD, info);
32 mutex_unlock(&gcov_lock);
33}
34EXPORT_SYMBOL(__gcov_init);
35
36/*
37 * These functions may be referenced by gcc-generated profiling code but serve
38 * no function for kernel profiling.
39 */
40void __gcov_flush(void)
41{
42 /* Unused. */
43}
44EXPORT_SYMBOL(__gcov_flush);
45
46void __gcov_merge_add(gcov_type *counters, unsigned int n_counters)
47{
48 /* Unused. */
49}
50EXPORT_SYMBOL(__gcov_merge_add);
51
52void __gcov_merge_single(gcov_type *counters, unsigned int n_counters)
53{
54 /* Unused. */
55}
56EXPORT_SYMBOL(__gcov_merge_single);
57
58void __gcov_merge_delta(gcov_type *counters, unsigned int n_counters)
59{
60 /* Unused. */
61}
62EXPORT_SYMBOL(__gcov_merge_delta);
63
64void __gcov_merge_ior(gcov_type *counters, unsigned int n_counters)
65{
66 /* Unused. */
67}
68EXPORT_SYMBOL(__gcov_merge_ior);
69
70void __gcov_merge_time_profile(gcov_type *counters, unsigned int n_counters)
71{
72 /* Unused. */
73}
74EXPORT_SYMBOL(__gcov_merge_time_profile);
75
76void __gcov_merge_icall_topn(gcov_type *counters, unsigned int n_counters)
77{
78 /* Unused. */
79}
80EXPORT_SYMBOL(__gcov_merge_icall_topn);
81
82void __gcov_exit(void)
83{
84 /* Unused. */
85}
86EXPORT_SYMBOL(__gcov_exit);