gcov.h (2668B)
1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * Profiling infrastructure declarations. 4 * 5 * This file is based on gcc-internal definitions. Data structures are 6 * defined to be compatible with gcc counterparts. For a better 7 * understanding, refer to gcc source: gcc/gcov-io.h. 8 * 9 * Copyright IBM Corp. 2009 10 * Author(s): Peter Oberparleiter <oberpar@linux.vnet.ibm.com> 11 * 12 * Uses gcc-internal data definitions. 13 */ 14 15#ifndef GCOV_H 16#define GCOV_H GCOV_H 17 18#include <linux/module.h> 19#include <linux/types.h> 20 21/* 22 * Profiling data types used for gcc 3.4 and above - these are defined by 23 * gcc and need to be kept as close to the original definition as possible to 24 * remain compatible. 25 */ 26#define GCOV_DATA_MAGIC ((unsigned int) 0x67636461) 27#define GCOV_TAG_FUNCTION ((unsigned int) 0x01000000) 28#define GCOV_TAG_COUNTER_BASE ((unsigned int) 0x01a10000) 29#define GCOV_TAG_FOR_COUNTER(count) \ 30 (GCOV_TAG_COUNTER_BASE + ((unsigned int) (count) << 17)) 31 32#if BITS_PER_LONG >= 64 33typedef long gcov_type; 34#else 35typedef long long gcov_type; 36#endif 37 38/* Opaque gcov_info. The gcov structures can change as for example in gcc 4.7 so 39 * we cannot use full definition here and they need to be placed in gcc specific 40 * implementation of gcov. This also means no direct access to the members in 41 * generic code and usage of the interface below.*/ 42struct gcov_info; 43 44/* Interface to access gcov_info data */ 45const char *gcov_info_filename(struct gcov_info *info); 46unsigned int gcov_info_version(struct gcov_info *info); 47struct gcov_info *gcov_info_next(struct gcov_info *info); 48void gcov_info_link(struct gcov_info *info); 49void gcov_info_unlink(struct gcov_info *prev, struct gcov_info *info); 50bool gcov_info_within_module(struct gcov_info *info, struct module *mod); 51size_t convert_to_gcda(char *buffer, struct gcov_info *info); 52 53/* Base interface. */ 54enum gcov_action { 55 GCOV_ADD, 56 GCOV_REMOVE, 57}; 58 59void gcov_event(enum gcov_action action, struct gcov_info *info); 60void gcov_enable_events(void); 61 62/* writing helpers */ 63size_t store_gcov_u32(void *buffer, size_t off, u32 v); 64size_t store_gcov_u64(void *buffer, size_t off, u64 v); 65 66/* gcov_info control. */ 67void gcov_info_reset(struct gcov_info *info); 68int gcov_info_is_compatible(struct gcov_info *info1, struct gcov_info *info2); 69void gcov_info_add(struct gcov_info *dest, struct gcov_info *source); 70struct gcov_info *gcov_info_dup(struct gcov_info *info); 71void gcov_info_free(struct gcov_info *info); 72 73struct gcov_link { 74 enum { 75 OBJ_TREE, 76 SRC_TREE, 77 } dir; 78 const char *ext; 79}; 80extern const struct gcov_link gcov_link[]; 81 82extern int gcov_events_enabled; 83extern struct mutex gcov_lock; 84 85#endif /* GCOV_H */