Make deleting handlers robust against deletion of any elements in a handler by using a deleted flag like in file descriptors.
Signed-off-by: Yoshiaki Tamura <tamura.yoshi...@lab.ntt.co.jp> --- vl.c | 13 +++++++++---- 1 files changed, 9 insertions(+), 4 deletions(-) diff --git a/vl.c b/vl.c index 0292184..8bbb785 100644 --- a/vl.c +++ b/vl.c @@ -1140,6 +1140,7 @@ static void nographic_update(void *opaque) struct vm_change_state_entry { VMChangeStateHandler *cb; void *opaque; + int deleted; QLIST_ENTRY (vm_change_state_entry) entries; }; @@ -1160,8 +1161,7 @@ VMChangeStateEntry *qemu_add_vm_change_state_handler(VMChangeStateHandler *cb, void qemu_del_vm_change_state_handler(VMChangeStateEntry *e) { - QLIST_REMOVE (e, entries); - qemu_free (e); + e->deleted = 1; } void vm_state_notify(int running, int reason) @@ -1170,8 +1170,13 @@ void vm_state_notify(int running, int reason) trace_vm_state_notify(running, reason); - for (e = vm_change_state_head.lh_first; e; e = e->entries.le_next) { - e->cb(e->opaque, running, reason); + QLIST_FOREACH(e, &vm_change_state_head, entries) { + if (e->deleted) { + QLIST_REMOVE(e, entries); + qemu_free(e); + } else { + e->cb(e->opaque, running, reason); + } } } -- 1.7.1.2