A loop such as the following leaks memory in libdbi 0.8.3:
for (n = 0; n < 100000; n++) {
res = dbi_conn_query(conn, "SELECT * FROM foo;");
if (!dbi_result_first_row(res)) {
fprintf(stderr, "dbi_result_first_row() failed.\n");
exit(1);
}
for (i = 0; i < 2; i++) {
do {
val = dbi_result_get_int(res, "val");
if (n == 0)
printf("val: %d\n", val);
} while (dbi_result_next_row(res));
/* Rewind for the next iteration of the for() loop */
if (!dbi_result_first_row(res)) {
fprintf(stderr, "dbi_result_first_row() failed.\n");
exit(1);
}
}
dbi_result_free(res);
}
This patch appears to fix it:
diff -Naur libdbi-0.8.3.orig/src/dbi_result.c libdbi-0.8.3/src/dbi_result.c
--- libdbi-0.8.3.orig/src/dbi_result.c 2008-01-23 11:37:36.000000000 -0500
+++ libdbi-0.8.3/src/dbi_result.c 2011-09-06 20:51:34.610449576 -0400
@@ -1533,7 +1533,7 @@
}
static int _is_row_fetched(dbi_result_t *result, unsigned long long row) {
- if (!result->rows || (row >= result->numrows_matched)) return -1;
+ if (!result->rows || (row > result->numrows_matched)) return -1;
return !(result->rows[row] == NULL);
}
This was discovered by some folks at Bull, who also deserve credit for
the patch, but I don't have a full name.
regards, tom lane
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