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gcov: fix gcov-tool merge for TOPN counters 

libgcc/ChangeLog:

	* libgcov-util.c (read_gcda_finalize): Remove const operator.
	(merge_wrapper): Add both counts and use them properly.
	(topn_to_memory_representation): New function.
	(gcov_merge): Covert on disk representation to in memory
	representation.
	* libgcov.h: Remove const operator.
This commit is contained in:
Martin Liska 2020-06-16 14:14:03 +02:00
parent 56638b9b18
commit 5fc312a98e
No known key found for this signature in database
GPG Key ID: 4DC182DC0FA73785
2 changed files with 61 additions and 11 deletions
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68
libgcc/libgcov-util.c
View File

@ -243,7 +243,7 @@ read_gcda_finalize (struct gcov_info *obj_info)
/* We set the following fields: merge, n_functions, functions
and summary. */
obj_info->n_functions = num_fn_info;
obj_info->functions = (const struct gcov_fn_info**) obstack_finish (&fn_info);
obj_info->functions = (struct gcov_fn_info**) obstack_finish (&fn_info);
/* wrap all the counter array. */
for (i=0; i< GCOV_COUNTERS; i++)
@ -506,14 +506,58 @@ gcov_get_merge_weight (void)
value buffer and weights and then calls the merge function. */
static void
merge_wrapper (gcov_merge_fn f, gcov_type *v1, gcov_unsigned_t n,
gcov_type *v2, unsigned w)
merge_wrapper (gcov_merge_fn f, gcov_type *v1, gcov_unsigned_t n1,
gcov_type *v2, gcov_unsigned_t n2, unsigned w)
{
gcov_value_buf = v2;
gcov_value_buf_pos = 0;
gcov_value_buf_size = n;
gcov_value_buf_size = n2;
gcov_merge_weight = w;
(*f) (v1, n);
(*f) (v1, n1);
}
/* Convert on disk representation of a TOPN counter to in memory representation
that is expected from __gcov_merge_topn function. */
static void
topn_to_memory_representation (struct gcov_ctr_info *info)
{
auto_vec<gcov_type> output;
gcov_type *values = info->values;
int count = info->num;
while (count > 0)
{
output.safe_push (values[0]);
gcov_type n = values[1];
output.safe_push (n);
if (n > 0)
{
struct gcov_kvp *tuples
= (struct gcov_kvp *)xcalloc (sizeof (struct gcov_kvp), n);
for (unsigned i = 0; i < n - 1; i++)
tuples[i].next = &tuples[i + 1];
for (unsigned i = 0; i < n; i++)
{
tuples[i].value = values[2 + 2 * i];
tuples[i].count = values[2 + 2 * i + 1];
}
output.safe_push ((intptr_t)&tuples[0]);
}
else
output.safe_push (0);
unsigned len = 2 * n + 2;
values += len;
count -= len;
}
gcc_assert (count == 0);
/* Allocate new buffer and copy it there. */
info->num = output.length ();
info->values = (gcov_type *)xmalloc (sizeof (gcov_type) * info->num);
for (unsigned i = 0; i < info->num; i++)
info->values[i] = output[i];
}
/* Offline tool to manipulate profile data.
@ -543,9 +587,9 @@ gcov_merge (struct gcov_info *info1, struct gcov_info *info2, int w)
for (f_ix = 0; f_ix < n_functions; f_ix++)
{
unsigned t_ix;
const struct gcov_fn_info *gfi_ptr1 = info1->functions[f_ix];
const struct gcov_fn_info *gfi_ptr2 = info2->functions[f_ix];
const struct gcov_ctr_info *ci_ptr1, *ci_ptr2;
struct gcov_fn_info *gfi_ptr1 = info1->functions[f_ix];
struct gcov_fn_info *gfi_ptr2 = info2->functions[f_ix];
struct gcov_ctr_info *ci_ptr1, *ci_ptr2;
if (!gfi_ptr1 || gfi_ptr1->key != info1)
continue;
@ -569,8 +613,14 @@ gcov_merge (struct gcov_info *info1, struct gcov_info *info2, int w)
gcc_assert (merge1 == merge2);
if (!merge1)
continue;
if (merge1 == __gcov_merge_topn)
topn_to_memory_representation (ci_ptr1);
else
gcc_assert (ci_ptr1->num == ci_ptr2->num);
merge_wrapper (merge1, ci_ptr1->values, ci_ptr1->num, ci_ptr2->values, w);
merge_wrapper (merge1, ci_ptr1->values, ci_ptr1->num,
ci_ptr2->values, ci_ptr2->num, w);
ci_ptr1++;
ci_ptr2++;
}

2
libgcc/libgcov.h
View File

@ -216,7 +216,7 @@ struct gcov_info
const struct gcov_fn_info *const *functions; /* pointer to pointers
to function information */
#else
const struct gcov_fn_info **functions;
struct gcov_fn_info **functions;
#endif /* !IN_GCOV_TOOL */
};