^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * This code provides functions to handle gcc's profiling data format
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * introduced with gcc 4.7.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * This file is based heavily on gcc_3_4.c file.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * For a better understanding, refer to gcc source:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * gcc/gcov-io.h
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * libgcc/libgcov.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * Uses gcc-internal data definitions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/vmalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include "gcov.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #if (__GNUC__ >= 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define GCOV_COUNTERS 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #elif (__GNUC__ >= 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define GCOV_COUNTERS 9
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #elif (__GNUC__ > 5) || (__GNUC__ == 5 && __GNUC_MINOR__ >= 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define GCOV_COUNTERS 10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #elif __GNUC__ == 4 && __GNUC_MINOR__ >= 9
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define GCOV_COUNTERS 9
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define GCOV_COUNTERS 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define GCOV_TAG_FUNCTION_LENGTH 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) static struct gcov_info *gcov_info_head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * struct gcov_ctr_info - information about counters for a single function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * @num: number of counter values for this type
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * @values: array of counter values for this type
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * This data is generated by gcc during compilation and doesn't change
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * at run-time with the exception of the values array.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct gcov_ctr_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) unsigned int num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) gcov_type *values;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) * struct gcov_fn_info - profiling meta data per function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) * @key: comdat key
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * @ident: unique ident of function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) * @lineno_checksum: function lineo_checksum
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) * @cfg_checksum: function cfg checksum
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * @ctrs: instrumented counters
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * This data is generated by gcc during compilation and doesn't change
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) * at run-time.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * Information about a single function. This uses the trailing array
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) * idiom. The number of counters is determined from the merge pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) * array in gcov_info. The key is used to detect which of a set of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) * comdat functions was selected -- it points to the gcov_info object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * of the object file containing the selected comdat function.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) struct gcov_fn_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) const struct gcov_info *key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) unsigned int ident;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) unsigned int lineno_checksum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) unsigned int cfg_checksum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) struct gcov_ctr_info ctrs[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) * struct gcov_info - profiling data per object file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) * @version: gcov version magic indicating the gcc version used for compilation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) * @next: list head for a singly-linked list
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) * @stamp: uniquifying time stamp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) * @filename: name of the associated gcov data file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) * @merge: merge functions (null for unused counter type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) * @n_functions: number of instrumented functions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) * @functions: pointer to pointers to function information
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) * This data is generated by gcc during compilation and doesn't change
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) * at run-time with the exception of the next pointer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) struct gcov_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) unsigned int version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) struct gcov_info *next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) unsigned int stamp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) const char *filename;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) void (*merge[GCOV_COUNTERS])(gcov_type *, unsigned int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) unsigned int n_functions;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) struct gcov_fn_info **functions;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) * gcov_info_filename - return info filename
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) * @info: profiling data set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) const char *gcov_info_filename(struct gcov_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) return info->filename;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) * gcov_info_version - return info version
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) * @info: profiling data set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) unsigned int gcov_info_version(struct gcov_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) return info->version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) * gcov_info_next - return next profiling data set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) * @info: profiling data set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) * Returns next gcov_info following @info or first gcov_info in the chain if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) * @info is %NULL.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) struct gcov_info *gcov_info_next(struct gcov_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) if (!info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) return gcov_info_head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) return info->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) * gcov_info_link - link/add profiling data set to the list
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) * @info: profiling data set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) void gcov_info_link(struct gcov_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) info->next = gcov_info_head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) gcov_info_head = info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) * gcov_info_unlink - unlink/remove profiling data set from the list
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) * @prev: previous profiling data set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) * @info: profiling data set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) void gcov_info_unlink(struct gcov_info *prev, struct gcov_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) if (prev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) prev->next = info->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) gcov_info_head = info->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) * gcov_info_within_module - check if a profiling data set belongs to a module
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) * @info: profiling data set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) * @mod: module
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) * Returns true if profiling data belongs module, false otherwise.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) bool gcov_info_within_module(struct gcov_info *info, struct module *mod)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) return within_module((unsigned long)info, mod);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) /* Symbolic links to be created for each profiling data file. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) const struct gcov_link gcov_link[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) { OBJ_TREE, "gcno" }, /* Link to .gcno file in $(objtree). */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) { 0, NULL},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) * Determine whether a counter is active. Doesn't change at run-time.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) static int counter_active(struct gcov_info *info, unsigned int type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) return info->merge[type] ? 1 : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) /* Determine number of active counters. Based on gcc magic. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) static unsigned int num_counter_active(struct gcov_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) unsigned int result = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) for (i = 0; i < GCOV_COUNTERS; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) if (counter_active(info, i))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) result++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) * gcov_info_reset - reset profiling data to zero
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) * @info: profiling data set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) void gcov_info_reset(struct gcov_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) struct gcov_ctr_info *ci_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) unsigned int fi_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) unsigned int ct_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) ci_ptr = info->functions[fi_idx]->ctrs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) for (ct_idx = 0; ct_idx < GCOV_COUNTERS; ct_idx++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) if (!counter_active(info, ct_idx))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) memset(ci_ptr->values, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) sizeof(gcov_type) * ci_ptr->num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) ci_ptr++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) * gcov_info_is_compatible - check if profiling data can be added
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) * @info1: first profiling data set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) * @info2: second profiling data set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) * Returns non-zero if profiling data can be added, zero otherwise.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) int gcov_info_is_compatible(struct gcov_info *info1, struct gcov_info *info2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) return (info1->stamp == info2->stamp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) * gcov_info_add - add up profiling data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) * @dest: profiling data set to which data is added
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) * @source: profiling data set which is added
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) * Adds profiling counts of @source to @dest.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) void gcov_info_add(struct gcov_info *dst, struct gcov_info *src)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) struct gcov_ctr_info *dci_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) struct gcov_ctr_info *sci_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) unsigned int fi_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) unsigned int ct_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) unsigned int val_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) for (fi_idx = 0; fi_idx < src->n_functions; fi_idx++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) dci_ptr = dst->functions[fi_idx]->ctrs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) sci_ptr = src->functions[fi_idx]->ctrs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) for (ct_idx = 0; ct_idx < GCOV_COUNTERS; ct_idx++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) if (!counter_active(src, ct_idx))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) for (val_idx = 0; val_idx < sci_ptr->num; val_idx++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) dci_ptr->values[val_idx] +=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) sci_ptr->values[val_idx];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) dci_ptr++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) sci_ptr++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) * gcov_info_dup - duplicate profiling data set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) * @info: profiling data set to duplicate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) * Return newly allocated duplicate on success, %NULL on error.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) struct gcov_info *gcov_info_dup(struct gcov_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) struct gcov_info *dup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) struct gcov_ctr_info *dci_ptr; /* dst counter info */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) struct gcov_ctr_info *sci_ptr; /* src counter info */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) unsigned int active;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) unsigned int fi_idx; /* function info idx */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) unsigned int ct_idx; /* counter type idx */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) size_t fi_size; /* function info size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) size_t cv_size; /* counter values size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) dup = kmemdup(info, sizeof(*dup), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) if (!dup)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) dup->next = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) dup->filename = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) dup->functions = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) dup->filename = kstrdup(info->filename, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) if (!dup->filename)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) goto err_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) dup->functions = kcalloc(info->n_functions,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) sizeof(struct gcov_fn_info *), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) if (!dup->functions)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) goto err_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) active = num_counter_active(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) fi_size = sizeof(struct gcov_fn_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) fi_size += sizeof(struct gcov_ctr_info) * active;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) dup->functions[fi_idx] = kzalloc(fi_size, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) if (!dup->functions[fi_idx])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) goto err_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) *(dup->functions[fi_idx]) = *(info->functions[fi_idx]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) sci_ptr = info->functions[fi_idx]->ctrs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) dci_ptr = dup->functions[fi_idx]->ctrs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) for (ct_idx = 0; ct_idx < active; ct_idx++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) cv_size = sizeof(gcov_type) * sci_ptr->num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) dci_ptr->values = vmalloc(cv_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) if (!dci_ptr->values)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) goto err_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) dci_ptr->num = sci_ptr->num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) memcpy(dci_ptr->values, sci_ptr->values, cv_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) sci_ptr++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) dci_ptr++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) return dup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) err_free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) gcov_info_free(dup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) * gcov_info_free - release memory for profiling data set duplicate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) * @info: profiling data set duplicate to free
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) void gcov_info_free(struct gcov_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) unsigned int active;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) unsigned int fi_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) unsigned int ct_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) struct gcov_ctr_info *ci_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) if (!info->functions)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) goto free_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) active = num_counter_active(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) if (!info->functions[fi_idx])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) ci_ptr = info->functions[fi_idx]->ctrs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) for (ct_idx = 0; ct_idx < active; ct_idx++, ci_ptr++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) vfree(ci_ptr->values);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) kfree(info->functions[fi_idx]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) free_info:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) kfree(info->functions);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) kfree(info->filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) kfree(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) #define ITER_STRIDE PAGE_SIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) * struct gcov_iterator - specifies current file position in logical records
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) * @info: associated profiling data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) * @buffer: buffer containing file data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) * @size: size of buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) * @pos: current position in file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) struct gcov_iterator {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) struct gcov_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) void *buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) size_t size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) loff_t pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) * store_gcov_u32 - store 32 bit number in gcov format to buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) * @buffer: target buffer or NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) * @off: offset into the buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) * @v: value to be stored
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) * Number format defined by gcc: numbers are recorded in the 32 bit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) * unsigned binary form of the endianness of the machine generating the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) * file. Returns the number of bytes stored. If @buffer is %NULL, doesn't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) * store anything.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) static size_t store_gcov_u32(void *buffer, size_t off, u32 v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) u32 *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) if (buffer) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) data = buffer + off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) *data = v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) return sizeof(*data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) * store_gcov_u64 - store 64 bit number in gcov format to buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) * @buffer: target buffer or NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) * @off: offset into the buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) * @v: value to be stored
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) * Number format defined by gcc: numbers are recorded in the 32 bit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) * unsigned binary form of the endianness of the machine generating the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) * file. 64 bit numbers are stored as two 32 bit numbers, the low part
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) * first. Returns the number of bytes stored. If @buffer is %NULL, doesn't store
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) * anything.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) static size_t store_gcov_u64(void *buffer, size_t off, u64 v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) u32 *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) if (buffer) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) data = buffer + off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) data[0] = (v & 0xffffffffUL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) data[1] = (v >> 32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) return sizeof(*data) * 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) * convert_to_gcda - convert profiling data set to gcda file format
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) * @buffer: the buffer to store file data or %NULL if no data should be stored
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) * @info: profiling data set to be converted
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) * Returns the number of bytes that were/would have been stored into the buffer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) static size_t convert_to_gcda(char *buffer, struct gcov_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) struct gcov_fn_info *fi_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) struct gcov_ctr_info *ci_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) unsigned int fi_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) unsigned int ct_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) unsigned int cv_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) size_t pos = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) /* File header. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) pos += store_gcov_u32(buffer, pos, GCOV_DATA_MAGIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) pos += store_gcov_u32(buffer, pos, info->version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) pos += store_gcov_u32(buffer, pos, info->stamp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) fi_ptr = info->functions[fi_idx];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) /* Function record. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) pos += store_gcov_u32(buffer, pos, GCOV_TAG_FUNCTION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) pos += store_gcov_u32(buffer, pos, GCOV_TAG_FUNCTION_LENGTH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) pos += store_gcov_u32(buffer, pos, fi_ptr->ident);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) pos += store_gcov_u32(buffer, pos, fi_ptr->lineno_checksum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) pos += store_gcov_u32(buffer, pos, fi_ptr->cfg_checksum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) ci_ptr = fi_ptr->ctrs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) for (ct_idx = 0; ct_idx < GCOV_COUNTERS; ct_idx++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) if (!counter_active(info, ct_idx))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) /* Counter record. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) pos += store_gcov_u32(buffer, pos,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) GCOV_TAG_FOR_COUNTER(ct_idx));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) pos += store_gcov_u32(buffer, pos, ci_ptr->num * 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) for (cv_idx = 0; cv_idx < ci_ptr->num; cv_idx++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) pos += store_gcov_u64(buffer, pos,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) ci_ptr->values[cv_idx]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) ci_ptr++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) return pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) * gcov_iter_new - allocate and initialize profiling data iterator
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) * @info: profiling data set to be iterated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) * Return file iterator on success, %NULL otherwise.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) struct gcov_iterator *gcov_iter_new(struct gcov_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) struct gcov_iterator *iter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) iter = kzalloc(sizeof(struct gcov_iterator), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) if (!iter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) goto err_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) iter->info = info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) /* Dry-run to get the actual buffer size. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) iter->size = convert_to_gcda(NULL, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) iter->buffer = vmalloc(iter->size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) if (!iter->buffer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) goto err_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) convert_to_gcda(iter->buffer, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) return iter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) err_free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) kfree(iter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) * gcov_iter_get_info - return profiling data set for given file iterator
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) * @iter: file iterator
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) void gcov_iter_free(struct gcov_iterator *iter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) vfree(iter->buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) kfree(iter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) * gcov_iter_get_info - return profiling data set for given file iterator
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) * @iter: file iterator
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) struct gcov_info *gcov_iter_get_info(struct gcov_iterator *iter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) return iter->info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) * gcov_iter_start - reset file iterator to starting position
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) * @iter: file iterator
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) void gcov_iter_start(struct gcov_iterator *iter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) iter->pos = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) * gcov_iter_next - advance file iterator to next logical record
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) * @iter: file iterator
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) * Return zero if new position is valid, non-zero if iterator has reached end.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) int gcov_iter_next(struct gcov_iterator *iter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) if (iter->pos < iter->size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) iter->pos += ITER_STRIDE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) if (iter->pos >= iter->size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) * gcov_iter_write - write data for current pos to seq_file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) * @iter: file iterator
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) * @seq: seq_file handle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) * Return zero on success, non-zero otherwise.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) int gcov_iter_write(struct gcov_iterator *iter, struct seq_file *seq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) size_t len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) if (iter->pos >= iter->size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) len = ITER_STRIDE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) if (iter->pos + len > iter->size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) len = iter->size - iter->pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) seq_write(seq, iter->buffer + iter->pos, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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