Date: Thu, 20 Nov 2025 16:03:17 -0800 From: Mark Millard <marklmi@yahoo.com> To: Konstantin Belousov <kib@freebsd.org>, Michal Meloun <mmel@freebsd.org>, Warner Losh <imp@bsdimp.com>, freebsd-arm@freebsd.org, freebsd-current@freebsd.org Cc: bob prohaska <fbsd@www.zefox.net>, Adrian Chadd <adrian@freebsd.org>, Carl Shapiro <cshapiro@panix.com>, Ronald Klop <ronald@freebsd.org> Subject: Re: Still seeing Failed assertion: "p[i] == 0" [ *** i386 chroot on amd64 can get the failure on main 16 too *** ] Message-ID: <CD888A78-8BE4-4C0E-B767-B57DD212166C@yahoo.com> In-Reply-To: <32C6B8A3-E390-48C8-8454-753511ADDF57@yahoo.com> References: <aOvTG-20QRJtJJwf@int21h> <aRXuLTN4hkGykHIl@www.zefox.net> <877bvthymv.fsf@panix.com> <aRdJ5xYeKEmhuIgh@www.zefox.net> <ouy1pm0nued.fsf@panix3.panix.com> <aRtBYaaa0n3_lwar@www.zefox.net> <CAJ-Vmo=TbT7nD7rBrNnq3cutwMp9f7WXtQ-k9mUBne5ht4zGWg@mail.gmail.com> <13E753F4-84F8-4ADB-96B6-908897D6971C@yahoo.com> <3174F751-9853-4697-B0C0-98B54518A69F@yahoo.com> <E634EF40-545C-44D7-9050-83D18090F6EB@yahoo.com> <BA9E6753-F895-46C8-95F3-C3C8B1692033@yahoo.com> <A27FE12B-0074-4403-81F7-8A224CC96CC8@yahoo.com> <D17E06B0-4591-45F2-8C46-70D94E371941@yahoo.com> <463AC500-C7C7-43FB-B5EF-332CEBA3D944@yahoo.com> <F9590F2F-0CB0-4AA9-870E-A97D45C1EC01@yahoo.com> <3E0D6079-0F5B-463E-94D4-37506A837D33@yahoo.com> <05479AC8-C8EB-42A3-9A54-2CAF687023D2@yahoo.com> <422A55DB-E005-4DA5-89F3-52879F35F6A4@yahoo.com> <F1F45DCF-609B-4C15-A799-5BE757F43EB2@yahoo.com> <87fra9fd4m.fsf@panix.com> <CB53A94B-8C78-4BCC-AD99-66DE833C749D@yahoo.com> <878qg1f8wz.fsf@panix.com> <265F191D-5400-4A9D-BE99-F060770B5DED@yahoo.com> <32C6B8A3-E390-48C8-8454-753511ADDF57@yahoo.com>
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On Nov 20, 2025, at 15:38, Mark Millard <marklmi@yahoo.com> wrote:
> # cd /usr/src/
>
> # env WITH_META_MODE= make -j10 buildworld
> . . .
> Building /usr/obj/usr/src/i386.i386/lib/clang/libclang/CodeGen/CGExprScalar.pico
> <jemalloc>: /usr/src/contrib/jemalloc/include/jemalloc/internal/ehooks.h:170: Failed assertion: "p[i] == 0"
> Building /usr/obj/usr/src/i386.i386/lib/clang/libclang/CodeGen/CGGPUBuiltin.pico
> Abort trap (core dumped)
> *** [CodeGen/CGBuiltin.pico] Error code 134
>
> The 7950X3D system has 32 FreeBSD cpus (16 cores), 192 GiByTes of RAM,
[Silly typo fixed: GiBytes]
> Optane PCIe Storage media.
>
> # uname -apKU
> FreeBSD 7950X3D-UFS 16.0-CURRENT FreeBSD 16.0-CURRENT main-n281922-4872b48b175c GENERIC-NODEBUG amd64 amd64 1600004 1600004
>
> But in the chroot:
>
> # uname -apKU
> FreeBSD 7950X3D-UFS 16.0-CURRENT FreeBSD 16.0-CURRENT main-n281922-4872b48b175c GENERIC-NODEBUG i386 i386 1600004 1600004
>
> For that particular system I used:
>
> # grep physmem /boot/loader.conf
> hw.physmem="5G"
>
> It resulted in:
>
> # dmesg -a | grep 'memory *='
> real memory = 137434759168 (131068 MB)
> avail memory = 2708901888 (2583 MB)
>
> My odd top hack for monitoring and reporting
> various "Max(imum) Obs(erved)" figures shows:
>
> 1914Mi MaxObsActive
> 821116Ki MaxObsWired
> 2585Mi MaxObs(Act+Wir+Lndry)
> 1617Mi MaxObsSwapUsed,
> 3488Mi MaxObs(Act+Lndry+SwapUsed),
> 4166Mi MaxObs(A+Wir+L+SU) [at such a time: 4193Mi (A+W+L+SU+InAct)]
>
> I had to build main 16 for the i386 myself, based on the /usr/src/
> from the official pkgbase system in use: such is no longer available.
> I did not make changes to allow SIGABRT to core dump.
Dumb mistake: I *did* make changes to allow SIGABRT to core dump.
(I had done so earlier when figuring out how to do that. I
had left the source code change in place on that system and
it was in the copy of /usr/src/ that I put into the chroot
area.)
But I do not have pkg or gdb for the context as stands.
> -j8 did not fail. -j12 ran out of RAM+SWAP.
>
For reference (white space detail may not be preserved):
# diff -u /usr/src/contrib/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp.orig /usr/src/contrib/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp
--- /usr/src/contrib/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp.orig 2025-11-15 07:58:41.000000000 +0000
+++ /usr/src/contrib/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp 2025-11-18 01:26:50.661412000 +0000
@@ -345,7 +345,7 @@
#include <signal.h>
static const int Signals[] =
- { SIGABRT, SIGBUS, SIGFPE, SIGILL, SIGSEGV, SIGTRAP };
+ { /*SIGABRT,*/ SIGBUS, SIGFPE, SIGILL, SIGSEGV, SIGTRAP };
static const unsigned NumSignals = std::size(Signals);
static struct sigaction PrevActions[NumSignals];
# diff -u /usr/src/contrib/llvm-project/llvm/lib/Support/Unix/Signals.inc.orig /usr/src/contrib/llvm-project/llvm/lib/Support/Unix/Signals.inc
--- /usr/src/contrib/llvm-project/llvm/lib/Support/Unix/Signals.inc.orig 2025-11-15 07:58:41.000000000 +0000
+++ /usr/src/contrib/llvm-project/llvm/lib/Support/Unix/Signals.inc 2025-11-18 15:37:06.502424000 +0000
@@ -215,7 +215,7 @@
/// been ordered.
static const int KillSigs[] = {SIGILL,
SIGTRAP,
- SIGABRT,
+// SIGABRT,
SIGFPE,
SIGBUS,
SIGSEGV,
===
Mark Millard
marklmi at yahoo.com
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