/* * Profiling infrastructure declarations. * * This file is based on gcc-internal definitions. Data structures are * defined to be compatible with gcc counterparts. For a better * understanding, refer to gcc source: gcc/gcov-io.h. * * Copyright IBM Corp. 2009 * Author(s): Peter Oberparleiter <oberpar@linux.vnet.ibm.com> * * Uses gcc-internal data definitions. */ #ifndef GCOV_H #define GCOV_H GCOV_H #include <linux/types.h> /* * Profiling data types used for gcc 3.4 and above - these are defined by * gcc and need to be kept as close to the original definition as possible to * remain compatible. */ #define GCOV_COUNTERS 5 #define GCOV_DATA_MAGIC ((unsigned int) 0x67636461) #define GCOV_TAG_FUNCTION ((unsigned int) 0x01000000) #define GCOV_TAG_COUNTER_BASE ((unsigned int) 0x01a10000) #define GCOV_TAG_FOR_COUNTER(count) \ (GCOV_TAG_COUNTER_BASE + ((unsigned int) (count) << 17)) #if BITS_PER_LONG >= 64 typedef long gcov_type; #else typedef long long gcov_type; #endif /** * struct gcov_fn_info - profiling meta data per function * @ident: object file-unique function identifier * @checksum: function checksum * @n_ctrs: number of values per counter type belonging to this function * * This data is generated by gcc during compilation and doesn't change * at run-time. */ struct gcov_fn_info { unsigned int ident; unsigned int checksum; unsigned int n_ctrs[0]; }; /** * struct gcov_ctr_info - profiling data per counter type * @num: number of counter values for this type * @values: array of counter values for this type * @merge: merge function for counter values of this type (unused) * * This data is generated by gcc during compilation and doesn't change * at run-time with the exception of the values array. */ struct gcov_ctr_info { unsigned int num; gcov_type *values; void (*merge)(gcov_type *, unsigned int); }; /** * struct gcov_info - profiling data per object file * @version: gcov version magic indicating the gcc version used for compilation * @next: list head for a singly-linked list * @stamp: time stamp * @filename: name of the associated gcov data file * @n_functions: number of instrumented functions * @functions: function data * @ctr_mask: mask specifying which counter types are active * @counts: counter data per counter type * * This data is generated by gcc during compilation and doesn't change * at run-time with the exception of the next pointer. */ struct gcov_info { unsigned int version; struct gcov_info *next; unsigned int stamp; const char *filename; unsigned int n_functions; const struct gcov_fn_info *functions; unsigned int ctr_mask; struct gcov_ctr_info counts[0]; }; /* Base interface. */ enum gcov_action { GCOV_ADD, GCOV_REMOVE, }; void gcov_event(enum gcov_action action, struct gcov_info *info); void gcov_enable_events(void); /* Iterator control. */ struct seq_file; struct gcov_iterator; struct gcov_iterator *gcov_iter_new(struct gcov_info *info); void gcov_iter_free(struct gcov_iterator *iter); void gcov_iter_start(struct gcov_iterator *iter); int gcov_iter_next(struct gcov_iterator *iter); int gcov_iter_write(struct gcov_iterator *iter, struct seq_file *seq); struct gcov_info *gcov_iter_get_info(struct gcov_iterator *iter); /* gcov_info control. */ void gcov_info_reset(struct gcov_info *info); int gcov_info_is_compatible(struct gcov_info *info1, struct gcov_info *info2); void gcov_info_add(struct gcov_info *dest, struct gcov_info *source); struct gcov_info *gcov_info_dup(struct gcov_info *info); void gcov_info_free(struct gcov_info *info); struct gcov_link { enum { OBJ_TREE, SRC_TREE, } dir; const char *ext; }; extern const struct gcov_link gcov_link[]; #endif /* GCOV_H */