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author | Martin Liska <mliska@suse.cz> | 2020-01-31 13:10:14 +0100 |
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committer | Martin Liska <mliska@suse.cz> | 2020-06-02 12:11:02 +0200 |
commit | 871e5ada6d53d5eb495cc9f323983f347487c1b2 (patch) | |
tree | 15075fc87b2c7817e72f0b26b065a91e7963d0e6 /libgcc/libgcov.h | |
parent | 23438370f768802fefd732529177fcea074c493b (diff) | |
download | gcc-871e5ada6d53d5eb495cc9f323983f347487c1b2.zip gcc-871e5ada6d53d5eb495cc9f323983f347487c1b2.tar.gz gcc-871e5ada6d53d5eb495cc9f323983f347487c1b2.tar.bz2 |
Make TOPN counter dynamically allocated.
gcc/ChangeLog:
* coverage.c (get_coverage_counts): Skip sanity check for TOP N counters
as they have variable number of counters.
* gcov-dump.c (main): Add new option -r.
(print_usage): Likewise.
(tag_counters): All new raw format.
* gcov-io.h (struct gcov_kvp): New.
(GCOV_TOPN_VALUES): Remove.
(GCOV_TOPN_VALUES_COUNTERS): Likewise.
(GCOV_TOPN_MEM_COUNTERS): New.
(GCOV_TOPN_DISK_COUNTERS): Likewise.
(GCOV_TOPN_MAXIMUM_TRACKED_VALUES): Likewise.
* ipa-profile.c (ipa_profile_generate_summary): Use
GCOV_TOPN_MAXIMUM_TRACKED_VALUES.
(ipa_profile_write_edge_summary): Likewise.
(ipa_profile_read_edge_summary): Likewise.
(ipa_profile): Remove usage of GCOV_TOPN_VALUES.
* profile.c (sort_hist_values): Sort variable number
of counters.
(compute_value_histograms): Special case for TOP N counters
that have dynamic number of key-value pairs.
* value-prof.c (dump_histogram_value): Dump variable number
of key-value pairs.
(stream_in_histogram_value): Stream in variable number
of key-value pairs for TOP N counter.
(get_nth_most_common_value): Deal with variable number
of key-value pairs.
(dump_ic_profile): Use GCOV_TOPN_MAXIMUM_TRACKED_VALUES
for loop iteration.
(gimple_find_values_to_profile): Set GCOV_TOPN_MEM_COUNTERS
to n_counters.
* doc/gcov-dump.texi: Document new -r option.
libgcc/ChangeLog:
* libgcov-driver.c (prune_topn_counter): Remove.
(prune_counters): Likewise.
(merge_one_data): Special case TOP N counters
as they have variable length.
(write_top_counters): New.
(write_one_data): Special case TOP N.
(dump_one_gcov): Do not prune TOP N counters.
* libgcov-merge.c (merge_topn_values_set): Remove.
(__gcov_merge_topn): Use gcov_topn_add_value.
* libgcov-profiler.c (__gcov_topn_values_profiler_body):
Likewise here.
* libgcov.h (gcov_counter_add): New.
(gcov_counter_set_if_null): Likewise.
(gcov_topn_add_value): New.
Diffstat (limited to 'libgcc/libgcov.h')
-rw-r--r-- | libgcc/libgcov.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/libgcc/libgcov.h b/libgcc/libgcov.h index b248690..bc38f4d 100644 --- a/libgcc/libgcov.h +++ b/libgcc/libgcov.h @@ -373,6 +373,93 @@ gcov_get_counter_target (void) #endif } +/* Add VALUE to *COUNTER and make it with atomic operation + if USE_ATOMIC is true. */ + +static inline void +gcov_counter_add (gcov_type *counter, gcov_type value, int use_atomic) +{ + if (use_atomic) + __atomic_fetch_add (counter, value, __ATOMIC_RELAXED); + else + *counter += value; +} + +/* Set NODE to memory location COUNTER and make it with atomic operation + if USE_ATOMIC is true. */ + +static inline int +gcov_counter_set_if_null (gcov_type *counter, struct gcov_kvp *node, + int use_atomic) +{ + if (use_atomic) + return !__sync_val_compare_and_swap (counter, NULL, (intptr_t)node); + else + { + *counter = (intptr_t)node; + return 1; + } +} + +/* Add key value pair VALUE:COUNT to a top N COUNTERS. When INCREMENT_TOTAL + is true, add COUNT to total of the TOP counter. If USE_ATOMIC is true, + do it in atomic way. */ + +static inline void +gcov_topn_add_value (gcov_type *counters, gcov_type value, gcov_type count, + int use_atomic, int increment_total) +{ + if (increment_total) + gcov_counter_add (&counters[0], 1, use_atomic); + + struct gcov_kvp *prev_node = NULL; + struct gcov_kvp *minimal_node = NULL; + struct gcov_kvp *current_node = (struct gcov_kvp *)counters[2]; + + while (current_node) + { + if (current_node->value == value) + { + gcov_counter_add (¤t_node->count, count, use_atomic); + return; + } + + if (minimal_node == NULL + || current_node->count < minimal_node->count) + minimal_node = current_node; + + prev_node = current_node; + current_node = current_node->next; + } + + if (counters[1] == GCOV_TOPN_MAXIMUM_TRACKED_VALUES) + { + if (--minimal_node->count < count) + { + minimal_node->value = value; + minimal_node->count = count; + } + } + else + { + struct gcov_kvp *new_node + = (struct gcov_kvp *)xmalloc (sizeof (struct gcov_kvp)); + new_node->value = value; + new_node->count = count; + + int success = 0; + if (!counters[2]) + success = gcov_counter_set_if_null (&counters[2], new_node, use_atomic); + else if (prev_node && !prev_node->next) + success = gcov_counter_set_if_null ((gcov_type *)&prev_node->next, + new_node, use_atomic); + + /* Increment number of nodes. */ + if (success) + gcov_counter_add (&counters[1], 1, use_atomic); + } +} + #endif /* !inhibit_libc */ #endif /* GCC_LIBGCOV_H */ |