[PATCH v4 0/7] Fix check-qtest-ppc64 sanitizer errors

[Akihiko Odaki <akihiko.odaki@daynix.com>]

I saw various sanitizer errors when running check-qtest-ppc64. While
I could just turn off sanitizers, I decided to tackle them this time.

Unfortunately, GLib versions older than 2.81.0 do not free test data in
some cases so some sanitizer errors remain. All sanitizer errors will be
gone with this patch series combined with the following change for GLib:
https://gitlab.gnome.org/GNOME/glib/-/merge_requests/4120

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
---
Changes in v4:
- Changed to create a reference to the subregion instead of its owner
  when its owner equals to the container's owner.
- Dropped R-b from patch "memory: Do not create circular reference with
  subregion".
- Rebased.
- Link to v3: https://lore.kernel.org/r/20240708-san-v3-0-b03f671c40c6@daynix.com

Changes in v3:
- Added patch "memory: Clarify that we use owner's reference count".
- Added patch "memory: Refer to docs/devel/memory.rst for 'owner'".
- Fixed the message of patch
  "memory: Do not create circular reference with subregion".
- Dropped patch "cpu: Free cpu_ases" in favor of:
  https://lore.kernel.org/r/20240607115649.214622-7-salil.mehta@huawei.com/
  ("[PATCH V13 6/8] physmem: Add helper function to destroy CPU
  AddressSpace")
- Dropped patches "hw/ide: Convert macio ide_irq into GPIO line" and
  "hw/ide: Remove internal DMA qemu_irq" in favor of commit efb359346c7a
  ("hw/ide/macio: switch from using qemu_allocate_irq() to qdev input
  GPIOs")
- Dropped patch "hw/isa/vt82c686: Define a GPIO line between vt82c686
  and i8259" in favor of:
  https://patchew.org/QEMU/20240704205854.18537-1-shentey@gmail.com/
  ("[PATCH 0/3] Resolve vt82c686 and piix4 qemu_irq memory leaks")
- Dropped pulled patches.
- Link to v2: https://lore.kernel.org/r/20240627-san-v2-0-750bb0946dbd@daynix.com

Changes in v2:
- Rebased to "[PATCH] cpu: fix memleak of 'halt_cond' and 'thread'".
  (Philippe Mathieu-Daudé)
- Converted IRQs into GPIO lines and removed one qemu_irq usage.
  (Peter Maydell)
- s/suppresses/fixes/ (Michael S. Tsirkin)
- Corrected title of patch "hw/virtio: Free vqs after vhost_dev_cleanup()"
  (was "hw/virtio: Free vqs before vhost_dev_cleanup()")
- Link to v1: https://lore.kernel.org/r/20240626-san-v1-0-f3cc42302189@daynix.com

---
Akihiko Odaki (7):
      migration: Free removed SaveStateEntry
      memory: Do not refer to "memory region's reference count"
      memory: Refer to docs/devel/memory.rst for "owner"
      memory: Clarify that owner may be missing
      memory: Clarify owner must not call memory_region_ref()
      memory: Do not create circular reference with subregion
      tests/qtest: Delete previous boot file

 include/exec/memory.h        | 22 +++++++---------------
 migration/savevm.c           |  2 ++
 system/memory.c              |  8 ++++++--
 tests/qtest/migration-test.c | 18 +++++++++++-------
 4 files changed, 26 insertions(+), 24 deletions(-)
---
base-commit: 31669121a01a14732f57c49400bc239cf9fd505f
change-id: 20240625-san-097afaf4f1c2

Best regards,
-- 
Akihiko Odaki <akihiko.odaki@daynix.com>