From: "Michael S. Tsirkin" <mst@redhat.com>
To: qemu-devel@nongnu.org
Cc: kwolf@redhat.com, armbru@redhat.com, dgilbert@redhat.com
Subject: [Qemu-devel] [PATCH v2 0/3] error: allow local errors to trigger abort
Date: Wed, 17 Jun 2015 09:24:40 +0200 [thread overview]
Message-ID: <1434525861-21768-1-git-send-email-mst@redhat.com> (raw)
It's a common idiom:
Error *local_err = NULL;
....
foo(&local_err);
...
if (local_err) {
error_propagate(errp, local_err);
return;
}
Unfortunately it means that call to foo(&local_err) will
not abort even if errp is set to error_abort.
Instead, we get an abort at error_propagate which is too late,
that is, the quality of the stack trace is degraded in that it no longer
pinpoints the actual cause of failure.
To fix, add an API to check errp and set local_err to error_abort
if errp is error_abort.
This is out of RFC but I'm still not converting all users:
let's merge these patches, then I'll convert all users
on top.
Changes from v1:
Check Error * pointer, not the class, as suggested by Eric.
Extend commit log messages with explanation by Eric.
Michael S. Tsirkin (3):
error: don't rely on pointer comparisons
error: allow local errors to trigger abort
block/nfs: switch to error_init_local
include/qapi/error.h | 5 +++++
block/nfs.c | 2 +-
util/error.c | 22 +++++++++++++++++-----
3 files changed, 23 insertions(+), 6 deletions(-)
--
MST
next reply other threads:[~2015-06-17 7:24 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-17 7:24 Michael S. Tsirkin [this message]
2015-06-17 7:24 ` [Qemu-devel] [PATCH v2 1/3] error: don't rely on pointer comparisons Michael S. Tsirkin
2015-06-17 15:21 ` Eric Blake
2015-06-17 15:41 ` Eric Blake
2015-06-18 15:36 ` Markus Armbruster
2015-06-18 16:10 ` Markus Armbruster
2015-06-17 7:24 ` [Qemu-devel] [PATCH v2 2/3] error: allow local errors to trigger abort Michael S. Tsirkin
2015-06-17 7:24 ` [Qemu-devel] [PATCH v2 3/3] block/nfs: switch to error_init_local Michael S. Tsirkin
2015-06-17 15:32 ` Eric Blake
2015-06-23 9:03 ` Michael S. Tsirkin
2015-06-18 16:34 ` [Qemu-devel] [PATCH v2 0/3] error: allow local errors to trigger abort Markus Armbruster
2015-06-18 16:49 ` Paolo Bonzini
2015-06-22 11:31 ` Markus Armbruster
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