On 14/5/26 16:16, Stefan Hajnoczi wrote:
On Tue, May 12, 2026 at 2:32 PM Pierrick Bouvier
<[email protected]> wrote:
The following changes since commit 5e61afe211e82a9af15a8794a0bd29bb574e953b:
Merge tag 'ui-pull-request' of https://gitlab.com/marcandre.lureau/qemu into
staging (2026-05-11 10:49:53 -0400)
are available in the Git repository at:
https://gitlab.com/p-b-o/qemu tags/pbouvier/pr/target_info-20260512
for you to fetch changes up to 0fc2022c6331c5d5bdd9060c73d067abba3f5515:
target-info: replace target_info() in system-mode (2026-05-12 11:29:18 -0700)
----------------------------------------------------------------
Changes:
- [PATCH v6 0/5] single-binary: deduplicate target_info() (Pierrick Bouvier
<[email protected]>)
Link:
https://lore.kernel.org/qemu-devel/[email protected]
----------------------------------------------------------------
Pierrick Bouvier (5):
qom/object: register OBJECT and INTERFACE QOM types before main
qom/object: initialize type_table in static ctor with fundamental QOM
types
target-info: introduce TargetInfo in QOM
target-info-qom: detect target from QOM
target-info: replace target_info() in system-mode
Please take a look at this CI failure:
Testing ./build-oss-fuzz/DEST_DIR/qemu-fuzz-i386-target-generic-fuzz-cirrus-vga
...
AddressSanitizer:DEADLYSIGNAL
=================================================================
==5334==ERROR: AddressSanitizer: SEGV on unknown address
0x000000000020 (pc 0x5bd0beb39ef4 bp 0x7ffe0ad764d0 sp 0x7ffe0ad764c0
T0)
==5334==The signal is caused by a READ memory access.
==5334==Hint: address points to the zero page.
#0 0x5bd0beb39ef4 in target_endian_mode
/builds/qemu-project/qemu/build-oss-fuzz/../target-info.c:42:27
#1 0x5bd0beb39ef4 in target_big_endian
/builds/qemu-project/qemu/build-oss-fuzz/../target-info.c:47:12
#2 0x5bd0bf4f1da1 in qtest_process_command
/builds/qemu-project/qemu/build-oss-fuzz/../system/qtest.c:705:13
#3 0x5bd0bf4f1da1 in qtest_process_inbuf
/builds/qemu-project/qemu/build-oss-fuzz/../system/qtest.c:778:9
#4 0x5bd0bf4eef54 in qtest_server_inproc_recv
/builds/qemu-project/qemu/build-oss-fuzz/../system/qtest.c:910:9
#5 0x5bd0bfe18f85 in qtest_sendf
/builds/qemu-project/qemu/build-oss-fuzz/../tests/qtest/libqtest.c:715:5
#6 0x5bd0bfe15294 in qtest_query_target_endianness
/builds/qemu-project/qemu/build-oss-fuzz/../tests/qtest/libqtest.c:804:5
#7 0x5bd0bfe1f2f3 in qtest_inproc_init
/builds/qemu-project/qemu/build-oss-fuzz/../tests/qtest/libqtest.c:2043:23
#8 0x5bd0bfe71778 in qtest_setup
/builds/qemu-project/qemu/build-oss-fuzz/../tests/qtest/fuzz/fuzz.c:64:12
#9 0x5bd0bfe71778 in LLVMFuzzerInitialize
/builds/qemu-project/qemu/build-oss-fuzz/../tests/qtest/fuzz/fuzz.c:206:16
#10 0x5bd0be9b3b56 in fuzzer::FuzzerDriver(int*, char***, int
(*)(unsigned char const*, unsigned long)) fuzzer.o
#11 0x5bd0be9e2166 in main
IIUC the fuzzer mode doesn't call main() -> qemu_init() but a distinct
one via LLVMFuzzerInitialize().
We'd need to squash something like:
-- >8 --
diff --git a/tests/qtest/fuzz/fuzz.c b/tests/qtest/fuzz/fuzz.c
index ca248a51a6c..90f07dcda3d 100644
--- a/tests/qtest/fuzz/fuzz.c
+++ b/tests/qtest/fuzz/fuzz.c
@@ -172,6 +172,7 @@ int LLVMFuzzerInitialize(int *argc, char ***argv,
char ***envp)
/* Initialize qgraph and modules */
qos_graph_init();
module_call_init(MODULE_INIT_FUZZ_TARGET);
+ module_call_init(MODULE_INIT_TARGET_INFO);
module_call_init(MODULE_INIT_QOM);
module_call_init(MODULE_INIT_LIBQOS);
---
(/builds/qemu-project/qemu/build-oss-fuzz/DEST_DIR/qemu-fuzz-i386-target-generic-fuzz-cirrus-vga+0x46166)
(BuildId: 845b9265a3ae1439c62fb86e3bc4973f7ea7c960)
#12 0x7f7fef9a65b4 in __libc_start_call_main (/lib64/libc.so.6+0x35b4)
(BuildId: abd2a4d896fed122b3f7da571746f193feeb86a1)
#13 0x7f7fef9a6667 in __libc_start_main@GLIBC_2.2.5
(/lib64/libc.so.6+0x3667) (BuildId:
abd2a4d896fed122b3f7da571746f193feeb86a1)
#14 0x5bd0be9a8f34 in _start
(/builds/qemu-project/qemu/build-oss-fuzz/DEST_DIR/qemu-fuzz-i386-target-generic-fuzz-cirrus-vga+0xcf34)
(BuildId: 845b9265a3ae1439c62fb86e3bc4973f7ea7c960)
https://gitlab.com/qemu-project/qemu/-/jobs/14371480130
If this issue is caused by this pull request, please send a new
revision that solves the issue.
If this issue is not caused by this pull request, please let me know. Thanks!
Stefan
configs/targets/aarch64-softmmu.c | 6 ++---
configs/targets/arm-softmmu.c | 6 ++---
include/qemu/module.h | 1 +
include/qemu/target-info-init.h | 53 +++++++++++++++++++++++++++++++++++++++
include/qemu/target-info-qom.h | 30 ++++++++++++++++++++++
qom/object.c | 22 +++++-----------
system/vl.c | 4 +++
target-info-qom.c | 45 +++++++++++++++++++++++++++++++++
target-info-stub.c | 6 ++---
9 files changed, 145 insertions(+), 28 deletions(-)
create mode 100644 include/qemu/target-info-init.h
create mode 100644 include/qemu/target-info-qom.h
