Eric Blake 25dad6e8d5 qmp: Fix reference-counting of qnull on empty output visit ... Commit 6c2f9a15 ensured that we would not return NULL when the caller used an output visitor but had nothing to visit. But in doing so, it added a FIXME about a reference count leak that could abort qemu in the (unlikely) case of SIZE_MAX such visits (more plausible on 32-bit). (Although that commit suggested we might fix it in time for 2.5, we ran out of time; fortunately, it is unlikely enough to bite that it was not worth worrying about during the 2.5 release.) This fixes things by documenting the internal contracts, and explaining why the internal function can return NULL and only the public facing interface needs to worry about qnull(), thus avoiding over-referencing the qnull_ global object. It does not, however, fix the stupidity of the stack mixing up two separate pieces of information; add a FIXME to explain that issue, which will be fixed shortly in a future patch. Backports commit a86156401559cb4401cf9ecc704faeab6fc8bb19 from qemu		2018-02-20 08:07:31 -05:00
..
crypto
default-configs
docs
fpu
hw
include	qapi: Drop unused 'kind' for struct/enum visit	2018-02-19 23:43:54 -05:00
qapi	qmp: Fix reference-counting of qnull on empty output visit	2018-02-20 08:07:31 -05:00
qobject	qapi: Convert QType into QAPI built-in enum type	2018-02-19 21:47:05 -05:00
qom	qom: Swap 'name' next to visitor in ObjectPropertyAccessor	2018-02-19 23:14:37 -05:00
scripts	qapi: Drop unused 'kind' for struct/enum visit	2018-02-19 23:43:54 -05:00
target-arm
target-i386	qom: Swap 'name' next to visitor in ObjectPropertyAccessor	2018-02-19 23:14:37 -05:00
target-m68k
target-mips
target-sparc
tcg
util
aarch64.h
aarch64eb.h
accel.c
arm.h
armeb.h
CODING_STYLE
configure
COPYING
COPYING.LIB
cpu-exec-common.c
cpu-exec.c
cpus.c
cputlb.c
exec.c
gen_all_header.sh
glib_compat.c
HACKING
header_gen.py
ioport.c
LICENSE
m68k.h
Makefile
Makefile.objs
Makefile.target
memory_mapping.c
memory.c	qom: Swap 'name' next to visitor in ObjectPropertyAccessor	2018-02-19 23:14:37 -05:00
mips64.h
mips64el.h
mips.h
mipsel.h
powerpc.h
qapi-schema.json	qapi: Lazy creation of array types	2018-02-19 18:55:35 -05:00
qemu-log.c
qemu-timer.c
rules.mak
softmmu_template.h
sparc64.h
sparc.h
tcg-runtime.c
translate-all.c
translate-all.h
translate-common.c
unicorn_common.h
VERSION
vl.c
vl.h
x86_64.h