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maint: ptx: use a stricter COUNTED_BY for the word table

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* src/ptx.c (WORD_TABLE): Change the COUNTED_BY to use the length member
instead of alloc.
(digest_word_file): Increment the length before appending to the table
otherwise -fsanitize=bounds would kill the program.
This commit is contained in:
Collin Funk
2026-10-16 00:15:31 -07:00
parent 051456d414
commit e3dd28f790
1 changed files with 4 additions and 4 deletions
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8
src/ptx.c
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@@ -120,7 +120,7 @@ typedef struct
{
idx_t alloc; /* allocated length */
idx_t length; /* number of used entries */
WORD *start COUNTED_BY (alloc); /* array of WORDs */
WORD *start COUNTED_BY (length); /* array of WORDs */
}
WORD_TABLE;
@@ -695,9 +695,9 @@ digest_word_file (char const *file_name, WORD_TABLE *table)
if (table->length == table->alloc)
table->start = xpalloc (table->start, &table->alloc, 1, -1,
sizeof *table->start);
table->start[table->length].start = word_start;
table->start[table->length].size = cursor - word_start;
table->length++;
idx_t const table_idx = table->length++;
table->start[table_idx].start = word_start;
table->start[table_idx].size = cursor - word_start;
}
/* This test allows for an incomplete line at end of file. */