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buflist: debug

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This commit is contained in:
Andy Green 2018-04-28 07:49:31 +08:00
parent 65b68bdc70
commit 6e1caa5c56
1 changed files with 18 additions and 7 deletions
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25
lib/libwebsockets.c
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@ -935,32 +935,41 @@ int
lws_buflist_append_segment(struct lws_buflist **head, const uint8_t *buf, lws_buflist_append_segment(struct lws_buflist **head, const uint8_t *buf,
size_t len) size_t len)
{ {
struct lws_buflist *nbuf;
int first = !*head; int first = !*head;
void *p = *head; void *p = *head;
int sanity = 1024;
assert(buf); assert(buf);
assert(len); assert(len);
/* append at the tail */ /* append at the tail */
while (*head) while (*head) {
if (!--sanity || head == &((*head)->next)) {
lwsl_err("%s: corrupt list points to self\n", __func__);
return -1;
}
head = &((*head)->next); head = &((*head)->next);
}
lwsl_info("%s: len %u first %d %p\n", __func__, (uint32_t)len, first, p); lwsl_info("%s: len %u first %d %p\n", __func__, (uint32_t)len, first, p);
*head = (struct lws_buflist *) nbuf = (struct lws_buflist *)
lws_malloc(sizeof(**head) + len, __func__); lws_malloc(sizeof(**head) + len, __func__);
if (!*head) { if (!nbuf) {
lwsl_err("%s: OOM\n", __func__); lwsl_err("%s: OOM\n", __func__);
return -1; return -1;
} }
(*head)->len = len; nbuf->len = len;
(*head)->pos = 0; nbuf->pos = 0;
(*head)->next = NULL; nbuf->next = NULL;
p = (void *)(*head)->buf; p = (void *)nbuf->buf;
memcpy(p, buf, len); memcpy(p, buf, len);
*head = nbuf;
return first; /* returns 1 if first segment just created */ return first; /* returns 1 if first segment just created */
} }
@ -971,6 +980,7 @@ lws_buflist_destroy_segment(struct lws_buflist **head)
assert(*head); assert(*head);
*head = (*head)->next; *head = (*head)->next;
old->next = NULL;
lws_free(old); lws_free(old);
return !*head; /* returns 1 if last segment just destroyed */ return !*head; /* returns 1 if last segment just destroyed */
@ -983,6 +993,7 @@ lws_buflist_destroy_all_segments(struct lws_buflist **head)
while (p) { while (p) {
p1 = p->next; p1 = p->next;
p->next = NULL;
lws_free(p); lws_free(p);
p = p1; p = p1;
} }