Hey Neale,
How are you getting this crash ? Is it reliable ? Do you know what
commit seems to trigger it ?
You can try running with MONO_GC_DEBUG=nursery-canaries for additional
logging.
Vlad
From: Mono-devel-list <mono-devel-list-boun...@lists.dot.net> on behalf of
Neale Ferguson <ne...@sinenomine.net>
Date: Wednesday, 12 July 2017 at 00:35
To: Mono-Devel <mono-devel-l...@lists.ximian.com>
Subject: [Mono-dev] SEGV during nursery scanning
I recently started getting the following SEGV. It appears the stable field is
offset by 4 bytes:
#3 <signal handler called>
#4 sgen_client_par_object_get_size (vtable=0x8013150000000000,
o=0x20001002060) at sgen-gc.c:3752
#5 0x000000008028a4c4 in sgen_safe_object_get_size (obj=0x20001002060) at
../../mono/sgen/sgen-gc.h:756
#6 pin_objects_from_nursery_pin_queue (ctx=..., do_scan_objects=0) at
sgen-gc.c:634
#7 pin_objects_in_nursery (do_scan_objects=do_scan_objects@entry=0, ctx=<error
reading variable: value has been optimized out>) at sgen-gc.c:715
#8 0x00000000802911ea in collect_nursery (reason=reason@entry=0x803b9c04
"Nursery full", is_overflow=is_overflow@entry=0, unpin_queue=0x0) at
sgen-gc.c:1719
#9 0x0000000080291d6c in sgen_perform_collection
(requested_size=requested_size@entry=4096, generation_to_collect=<optimized
out>, reason=0x803b9c04 "Nursery full", wait_to_finish=wait_to_finish@entry=0,
stw=stw@entry=1) at sgen-gc.c:2504
The only changes I have made is removing the PROFILING code from mini-s390x.c.
Neale
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