LXR linux/kernel/gcov/gcc

   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);
  87