Date: Fri, 21 Nov 2025 08:30:54 -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: <5A0EABFD-A84F-444E-B41A-BC2F9584FF99@yahoo.com> In-Reply-To: <CD888A78-8BE4-4C0E-B767-B57DD212166C@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> <CD888A78-8BE4-4C0E-B767-B57DD212166C@yahoo.com>
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[lldb works for that i386 core dump.]
On Nov 20, 2025, at 16:03, Mark Millard <marklmi@yahoo.com> wrote:
> 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,
>
I'm used to lldb not working for armv7 that I did not
even think to try it for i386 until now. It works for
doing bt for i386. But the ehooks_debug_zero_check
call has addr=<unavailable> :
(lldb) bt
* thread #1, name = 'c++', stop reason = signal SIGABRT
* frame #0: 0x24bd378b libsys.so.7`__sys_thr_kill at thr_kill.S:4
frame #1: 0x2ab2231b libc.so.7`__raise(s=6) at raise.c:48:10
frame #2: 0x2abcc73b libc.so.7`abort at abort.c:61:8
frame #3: 0x2ac10440 libc.so.7`ehooks_debug_zero_check(addr=<unavailable>, size=<unavailable>) at ehooks.h:0
frame #4: 0x2ac0ccfa libc.so.7`__je_extent_alloc_wrapper [inlined] ehooks_alloc(tsdn=<unavailable>, ehooks=<unavailable>, new_addr=<unavailable>, size=<unavailable>, alignment=<unavailable>, zero=0xffff917b, commit=<unavailable>) at ehooks.h:208:3
frame #5: 0x2ac0cc5a libc.so.7`__je_extent_alloc_wrapper(tsdn=0x2adf90a0, pac=0x2b0015e4, ehooks=0x2b000080, new_addr=0x00000000, size=167936, alignment=64, zero=true, commit=0xffff91e3, growing_retained=<unavailable>) at jemalloc_extent.c:1003:15
frame #6: 0x2ac0c58e libc.so.7`__je_ecache_alloc_grow(tsdn=0x2adf90a0, pac=0x2b0015e4, ehooks=0x2b000080, ecache=0x2b0036d0, expand_edata=0x00000000, size=167936, alignment=64, zero=<unavailable>, guarded=<unavailable>) at jemalloc_extent.c:126:11
frame #7: 0x2ac3c73f libc.so.7`pac_alloc_impl [inlined] pac_alloc_real(tsdn=<unavailable>, pac=<unavailable>, ehooks=<unavailable>, size=<unavailable>, alignment=64, zero=<unavailable>, guarded=<unavailable>) at jemalloc_pac.c:124:11
frame #8: 0x2ac3c696 libc.so.7`pac_alloc_impl(tsdn=0x2adf90a0, self=0x2b0015e4, size=167936, alignment=64, zero=<unavailable>, guarded=<unavailable>, frequent_reuse=<unavailable>, deferred_work_generated=<unavailable>) at jemalloc_pac.c:178:11
frame #9: 0x2ac3afe0 libc.so.7`__je_pa_alloc [inlined] pai_alloc(tsdn=<unavailable>, self=<unavailable>, size=<unavailable>, alignment=<unavailable>, zero=<unavailable>, guarded=<unavailable>, frequent_reuse=<unavailable>, deferred_work_generated=<unavailable>) at pai.h:43:9
frame #10: 0x2ac3afc9 libc.so.7`__je_pa_alloc(tsdn=0x2adf90a0, shard=0x2b0015d8, size=167936, alignment=64, slab=<unavailable>, szind=49, zero=<unavailable>, guarded=<unavailable>, deferred_work_generated=0xffff92cf) at jemalloc_pa.c:139:11
frame #11: 0x2abea7a8 libc.so.7`__je_arena_extent_alloc_large(tsdn=0x2adf90a0, arena=0x2b000500, usize=163840, alignment=64, zero=<unavailable>) at jemalloc_arena.c:338:19
frame #12: 0x2ac117ea libc.so.7`__je_large_palloc(tsdn=0x2adf90a0, arena=<unavailable>, usize=163840, alignment=64, zero=<unavailable>) at jemalloc_large.c:37:42
frame #13: 0x2ac11342 libc.so.7`__je_large_malloc(tsdn=0x2adf90a0, arena=0x2b000500, usize=163840, zero=<unavailable>) at jemalloc_large.c:17:9
frame #14: 0x2abed45e libc.so.7`__je_arena_malloc_hard(tsdn=0x2adf90a0, arena=<unavailable>, size=131576, ind=49, zero=<unavailable>) at jemalloc_arena.c:1205:9
frame #15: 0x2abe1cb0 libc.so.7`iallocztm [inlined] arena_malloc(tsdn=<unavailable>, arena=<unavailable>, size=<unavailable>, ind=<unavailable>, zero=<unavailable>, tcache=<unavailable>, slow_path=<unavailable>) at arena_inlines_b.h:0
frame #16: 0x2abe1c52 libc.so.7`iallocztm(tsdn=<unavailable>, size=<unavailable>, ind=49, zero=<unavailable>, tcache=0x2adf92f0, is_internal=<unavailable>, arena=0x00000000, slow_path=<unavailable>) at jemalloc_internal_inlines_c.h:55:8
frame #17: 0x2abe7179 libc.so.7`imalloc_body [inlined] imalloc_no_sample(sopts=0xffff946c, dopts=0xffff944c, tsd=0x2adf90a0, size=131576, usize=163840, ind=49) at jemalloc_jemalloc.c:2402:9
frame #18: 0x2abe7106 libc.so.7`imalloc_body(sopts=<unavailable>, dopts=<unavailable>, tsd=0x2adf90a0) at jemalloc_jemalloc.c:2577:16
frame #19: 0x2abdae88 libc.so.7`imalloc(sopts=<unavailable>, dopts=<unavailable>) at tsd.h:0:2
frame #20: 0x2abdaddc libc.so.7`__je_malloc_default(size=131576) at jemalloc_jemalloc.c:2726:2
frame #21: 0x2abdb27f libc.so.7`__malloc [inlined] imalloc_fastpath(size=131576, fallback_alloc=<unavailable>) at jemalloc_internal_inlines_c.h:0:2
frame #22: 0x2abdb149 libc.so.7`__malloc(size=131576) at jemalloc_jemalloc.c:2750:9
frame #23: 0x28aa2b52 libprivatellvm.so.19`::mallocForGrow() [inlined] safe_malloc at MemAlloc.h:26:18
frame #24: 0x28aa2b4c libprivatellvm.so.19`::mallocForGrow() at SmallVector.cpp:130:19
frame #25: 0x2798f6dd libprivatellvm.so.19`::grow() [inlined] mallocForGrow at SmallVector.h:458:48
frame #26: 0x2798f6c9 libprivatellvm.so.19`::grow() at SmallVector.h:449:16
frame #27: 0x2798fa76 libprivatellvm.so.19`::resize() [inlined] reserveForParamAndGetAddressImpl<llvm::SmallVectorTemplateBase<std::__1::pair<llvm::PointerUnion<const llvm::TargetRegisterClass *, const llvm::RegisterBank *>, llvm::MachineOperand *>, false> > at SmallVector.h:257:11
frame #28: 0x2798fa5c libprivatellvm.so.19`::resize() [inlined] reserveForParamAndGetAddress at SmallVector.h:392:12
frame #29: 0x2798fa5c libprivatellvm.so.19`::resize() [inlined] append at SmallVector.h:707:29
frame #30: 0x2798fa5c libprivatellvm.so.19`::resize() at SmallVector.h:674:11
frame #31: 0x2798c39e libprivatellvm.so.19`::createVirtualRegister() [inlined] resize at IndexedMap.h:62:16
frame #32: 0x2798c393 libprivatellvm.so.19`::createVirtualRegister() [inlined] grow at IndexedMap.h:72:9
frame #33: 0x2798c390 libprivatellvm.so.19`::createVirtualRegister() [inlined] createIncompleteVirtualRegister at MachineRegisterInfo.cpp:149:12
frame #34: 0x2798c38d libprivatellvm.so.19`::createVirtualRegister() at MachineRegisterInfo.cpp:166:18
frame #35: 0x27c07b5f libprivatellvm.so.19`::EmitCopyFromReg() at InstrEmitter.cpp:173:19
frame #36: 0x27c0e366 libprivatellvm.so.19`::EmitSpecialNode() at InstrEmitter.cpp:1278:5
frame #37: 0x27d2707e libprivatellvm.so.19`::operator()() [inlined] EmitNode at InstrEmitter.h:147:7
frame #38: 0x27d27064 libprivatellvm.so.19`::operator()() at ScheduleDAGSDNodes.cpp:874:13
frame #39: 0x27d266c1 libprivatellvm.so.19`::EmitSchedule() at ScheduleDAGSDNodes.cpp:961:9
frame #40: 0x27e0ad27 libprivatellvm.so.19`::CodeGenAndEmitDAG() at SelectionDAGISel.cpp:1126:42
frame #41: 0x27e08f06 libprivatellvm.so.19`::SelectBasicBlock() at SelectionDAGISel.cpp:850:3
frame #42: 0x27e08310 libprivatellvm.so.19`::SelectAllBasicBlocks() at SelectionDAGISel.cpp:1863:7
frame #43: 0x27e056de libprivatellvm.so.19`::runOnMachineFunction() at SelectionDAGISel.cpp:631:3
frame #44: 0x2964affa libprivatellvm.so.19`::runOnMachineFunction() at X86ISelDAGToDAG.cpp:190:32
frame #45: 0x27e0377d libprivatellvm.so.19`::runOnMachineFunction() at SelectionDAGISel.cpp:374:20
frame #46: 0x278de5f1 libprivatellvm.so.19`::runOnFunction() at MachineFunctionPass.cpp:94:13
frame #47: 0x283716f2 libprivatellvm.so.19`::runOnFunction() at LegacyPassManager.cpp:1440:27
frame #48: 0x28378063 libprivatellvm.so.19`::runOnModule() at LegacyPassManager.cpp:1486:16
frame #49: 0x28371ee4 libprivatellvm.so.19`::run() [inlined] runOnModule at LegacyPassManager.cpp:1555:27
frame #50: 0x28371b90 libprivatellvm.so.19`::run() at LegacyPassManager.cpp:541:44
frame #51: 0x283784ee libprivatellvm.so.19`llvm::legacy::PassManager::run(llvm::Module&) at LegacyPassManager.cpp:1682:14
frame #52: 0x228e059a libprivateclang.so.19`::EmitBackendOutput() [inlined] RunCodegenPipeline at BackendUtil.cpp:1157:19
frame #53: 0x228e0589 libprivateclang.so.19`::EmitBackendOutput() [inlined] EmitAssembly at BackendUtil.cpp:1180:3
frame #54: 0x228e0589 libprivateclang.so.19`::EmitBackendOutput() at BackendUtil.cpp:1341:13
frame #55: 0x22d84b4d libprivateclang.so.19`::HandleTranslationUnit() at CodeGenAction.cpp:354:3
frame #56: 0x234f63bd libprivateclang.so.19`::ParseAST() at ParseAST.cpp:184:13
frame #57: 0x2335bdef libprivateclang.so.19`::ExecuteAction() at FrontendAction.cpp:1192:3
frame #58: 0x22d8ad1d libprivateclang.so.19`::ExecuteAction() at CodeGenAction.cpp:1144:30
frame #59: 0x2335b650 libprivateclang.so.19`::Execute() at FrontendAction.cpp:1078:8
frame #60: 0x232bc3ac libprivateclang.so.19`::ExecuteAction() at CompilerInstance.cpp:1061:33
frame #61: 0x233f3b7c libprivateclang.so.19`::ExecuteCompilerInvocation() at ExecuteCompilerInvocation.cpp:280:25
frame #62: 0x0040df8f c++`::cc1_main() at cc1_main.cpp:284:15
frame #63: 0x0041c927 c++`::ExecuteCC1Tool() at driver.cpp:215:12
frame #64: 0x22f460a6 libprivateclang.so.19`::callback_fn<(lambda at /usr/src/contrib/llvm-project/clang/lib/Driver/Job.cpp:440:22)>() [inlined] operator() at STLFunctionalExtras.h:68:12
frame #65: 0x22f46097 libprivateclang.so.19`::callback_fn<(lambda at /usr/src/contrib/llvm-project/clang/lib/Driver/Job.cpp:440:22)>() [inlined] operator() at Job.cpp:440:34
frame #66: 0x22f46094 libprivateclang.so.19`::callback_fn<(lambda at /usr/src/contrib/llvm-project/clang/lib/Driver/Job.cpp:440:22)>() at STLFunctionalExtras.h:45:12
frame #67: 0x28a3f834 libprivatellvm.so.19`::RunSafely() [inlined] operator() at STLFunctionalExtras.h:68:12
frame #68: 0x28a3f82f libprivatellvm.so.19`::RunSafely() at CrashRecoveryContext.cpp:426:3
frame #69: 0x22f456d4 libprivateclang.so.19`::Execute() at Job.cpp:440:12
frame #70: 0x22f00688 libprivateclang.so.19`::ExecuteCommand() at Compilation.cpp:199:15
frame #71: 0x22f0097e libprivateclang.so.19`::ExecuteJobs() at Compilation.cpp:253:19
frame #72: 0x22f21e9c libprivateclang.so.19`::ExecuteCompilation() at Driver.cpp:1943:5
frame #73: 0x0041bfdd c++`::clang_main() at driver.cpp:391:21
frame #74: 0x0041a387 c++`main at clang-driver.cpp:17:10
frame #75: 0x2aaf8820 libc.so.7`__libc_start1(argc=71, argv=0xffffc2a4, env=0xffffc3c4, cleanup=(ld-elf.so.1`rtld_nop_exit at rtld.c:3602), mainX=(c++`main at clang-driver.cpp:15)) at libc_start1.c:180:7
frame #76: 0x0040c438 c++`_start at crt1_s.S:84
(I have rarely used lldb. So its commands are not generally
familiar.)
===
Mark Millard
marklmi at yahoo.com
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