From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:44278) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Qh0lj-000733-CW for qemu-devel@nongnu.org; Wed, 13 Jul 2011 10:50:32 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Qh0lh-00085g-Hx for qemu-devel@nongnu.org; Wed, 13 Jul 2011 10:50:30 -0400 Received: from mx1.redhat.com ([209.132.183.28]:30367) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Qh0lg-00085P-Ll for qemu-devel@nongnu.org; Wed, 13 Jul 2011 10:50:28 -0400 Received: from int-mx01.intmail.prod.int.phx2.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id p6DEoRNL009516 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Wed, 13 Jul 2011 10:50:27 -0400 From: Alon Levy Date: Wed, 13 Jul 2011 17:49:52 +0300 Message-Id: <1310568597-24181-7-git-send-email-alevy@redhat.com> In-Reply-To: <1310568597-24181-1-git-send-email-alevy@redhat.com> References: <1310568597-24181-1-git-send-email-alevy@redhat.com> Subject: [Qemu-devel] [PATCHv4 06/11] qxl: error handling fixes and cleanups. List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: yhalperi@redhat.com, kraxel@redhat.com From: Gerd Hoffmann Add qxl_guest_bug() function which is supposed to be called in case sanity checks of guest requests fail. It raises an error IRQ and logs a message in case guest debugging is enabled. Make PANIC_ON() abort instead of exit. That macro should be used for qemu bugs only, any guest-triggerable stuff should use the new qxl_guest_bug() function instead. Convert a few easy cases from PANIC_ON() to qxl_guest_bug() to show intended usage. Signed-off-by: Gerd Hoffmann --- hw/qxl.c | 32 ++++++++++++++++++++++++++++---- hw/qxl.h | 3 ++- 2 files changed, 30 insertions(+), 5 deletions(-) diff --git a/hw/qxl.c b/hw/qxl.c index 2ecc932..3d1f108 100644 --- a/hw/qxl.c +++ b/hw/qxl.c @@ -124,6 +124,14 @@ static void qxl_reset_memslots(PCIQXLDevice *d); static void qxl_reset_surfaces(PCIQXLDevice *d); static void qxl_ring_set_dirty(PCIQXLDevice *qxl); +void qxl_guest_bug(PCIQXLDevice *qxl, const char *msg) +{ + qxl_send_events(qxl, QXL_INTERRUPT_ERROR); + if (qxl->guestdebug) { + fprintf(stderr, "qxl-%d: guest bug: %s\n", qxl->id, msg); + } +} + void qxl_spice_update_area(PCIQXLDevice *qxl, uint32_t surface_id, struct QXLRect *area, struct QXLRect *dirty_rects, @@ -1111,22 +1119,38 @@ static void ioport_write(void *opaque, uint32_t addr, uint32_t val) qxl_hard_reset(d, 0); break; case QXL_IO_MEMSLOT_ADD: - PANIC_ON(val >= NUM_MEMSLOTS); - PANIC_ON(d->guest_slots[val].active); + if (val >= NUM_MEMSLOTS) { + qxl_guest_bug(d, "QXL_IO_MEMSLOT_ADD: val out of range"); + break; + } + if (d->guest_slots[val].active) { + qxl_guest_bug(d, "QXL_IO_MEMSLOT_ADD: memory slot already active"); + break; + } d->guest_slots[val].slot = d->ram->mem_slot; qxl_add_memslot(d, val, 0); break; case QXL_IO_MEMSLOT_DEL: + if (val >= NUM_MEMSLOTS) { + qxl_guest_bug(d, "QXL_IO_MEMSLOT_DEL: val out of range"); + break; + } qxl_del_memslot(d, val); break; case QXL_IO_CREATE_PRIMARY: - PANIC_ON(val != 0); + if (val != 0) { + qxl_guest_bug(d, "QXL_IO_CREATE_PRIMARY: val != 0"); + break; + } dprint(d, 1, "QXL_IO_CREATE_PRIMARY\n"); d->guest_primary.surface = d->ram->create_surface; qxl_create_guest_primary(d, 0); break; case QXL_IO_DESTROY_PRIMARY: - PANIC_ON(val != 0); + if (val != 0) { + qxl_guest_bug(d, "QXL_IO_DESTROY_PRIMARY: val != 0"); + break; + } dprint(d, 1, "QXL_IO_DESTROY_PRIMARY (%s)\n", qxl_mode_to_string(d->mode)); if (d->mode != QXL_MODE_UNDEFINED) { d->mode = QXL_MODE_UNDEFINED; diff --git a/hw/qxl.h b/hw/qxl.h index 5d0e85e..5db9aae 100644 --- a/hw/qxl.h +++ b/hw/qxl.h @@ -86,7 +86,7 @@ typedef struct PCIQXLDevice { #define PANIC_ON(x) if ((x)) { \ printf("%s: PANIC %s failed\n", __FUNCTION__, #x); \ - exit(-1); \ + abort(); \ } #define dprint(_qxl, _level, _fmt, ...) \ @@ -99,6 +99,7 @@ typedef struct PCIQXLDevice { /* qxl.c */ void *qxl_phys2virt(PCIQXLDevice *qxl, QXLPHYSICAL phys, int group_id); +void qxl_guest_bug(PCIQXLDevice *qxl, const char *msg); void qxl_spice_update_area(PCIQXLDevice *qxl, uint32_t surface_id, struct QXLRect *area, struct QXLRect *dirty_rects, -- 1.7.6