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