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Bug1223: Avoid stack overflow crash generating long click track

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This commit is contained in:
Paul Licameli 2016-06-21 17:51:00 -04:00
parent 03915b4438
commit 8ad9fd257c
1 changed files with 34 additions and 26 deletions
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60
lib-src/libnyquist/nyquist/nyqsrc/sound.c
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@ -517,32 +517,40 @@ void snd_list_unref(snd_list_type list)
{
void (*freefunc)();
if (list == NULL || list == zero_snd_list) {
if (list == NULL)
nyquist_printf("why did snd_list_unref get %p?\n", list);
return;
}
list->refcnt--;
/* nyquist_printf("snd_list_unref "); print_snd_list_type(list); stdputstr("\n"); */
if (list->refcnt == 0) {
if (list->block && list->block != zero_block) {
/* there is a next snd_list */
/* stdputstr("["); */
sample_block_unref(list->block);
/* stdputstr("]"); */
snd_list_unref(list->u.next);
}
else if (list->block == NULL) { /* the next thing is the susp */
/* free suspension structure */
/* nyquist_printf("freeing susp@%p\n", list->u.susp); */
freefunc = list->u.susp->free;
(*freefunc)(list->u.susp);
}
/* nyquist_printf("freeing snd_list@%p\n", list); */
//DBY
if (list == list_watch) printf("freeing watched snd_list %p\n", list);
//DBY
ffree_snd_list(list, "snd_list_unref");
if (list == NULL) {
nyquist_printf("why did snd_list_unref get %p?\n", list);
return;
}
while (! (list == NULL || list == zero_snd_list) ) {
list->refcnt--;
/* nyquist_printf("snd_list_unref "); print_snd_list_type(list); stdputstr("\n"); */
if (list->refcnt == 0) {
snd_list_type next;
if (list->block && list->block != zero_block) {
/* there is a next snd_list */
next = list->u.next;
/* stdputstr("["); */
sample_block_unref(list->block);
/* stdputstr("]"); */
}
else if (list->block == NULL) { /* the next thing is the susp */
/* free suspension structure */
/* nyquist_printf("freeing susp@%p\n", list->u.susp); */
freefunc = list->u.susp->free;
(*freefunc)(list->u.susp);
next = NULL;
}
/* nyquist_printf("freeing snd_list@%p\n", list); */
//DBY
if (list == list_watch) printf("freeing watched snd_list %p\n", list);
//DBY
ffree_snd_list(list, "snd_list_unref");
list = next;
}
else
break;
}
}