Date: Tue, 18 Nov 2025 17:14:46 -0800 From: Mark Millard <marklmi@yahoo.com> To: freebsd-arm@freebsd.org, freebsd-current@freebsd.org Subject: Re: Still seeing Failed assertion: "p[i] == 0" on armv7 buildworld [Notes from another example core dump: #1] Message-ID: <2265C8CF-F12B-4EC5-91B5-D3B0289F440E@yahoo.com> In-Reply-To: <D17E06B0-4591-45F2-8C46-70D94E371941@yahoo.com> References: <aOvTG-20QRJtJJwf@int21h> <CANCZdfrJ8rph_rkT3Mk-sNYKNspoV15SvHWLsahzS0HnULi4ww@mail.gmail.com> <aO068RrAehdiHOoZ@www.zefox.net> <aRUJPryA4Vmu8dDD@www.zefox.net> <4957be52-e57f-4f5f-9626-d0f706480fe1@FreeBSD.org> <87ldkai9lu.fsf@panix.com> <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>
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[I misattributes a zero=flase to #15.] On Nov 18, 2025, at 17:05, Mark Millard <marklmi@yahoo.com> wrote: > [I came up with an addition type of note to have for these tests.] > > On Nov 18, 2025, at 16:29, Mark Millard <marklmi@yahoo.com> wrote: > >> I'm only sending notes from testing of how similar other failures appear >> to the 2 lists. Folks can ask that I do otherwise for them if they want. >> >> This one is for size 4096 (1 page). It looks like #0..#15 are similar to >> the original report but #16 is not. #15 is for: arena_malloc >> >> (gdb) bt >> #0 thr_kill () at thr_kill.S:4 >> #1 0x2a08ef24 in __raise (s=6) at /usr/src/lib/libc/gen/raise.c:48 >> #2 0x2a145f38 in abort () at /usr/src/lib/libc/stdlib/abort.c:61 >> #3 0x2a196128 in ehooks_debug_zero_check (addr=addr@entry=0x2a80d000, size=size@entry=4096) at /usr/src/contrib/jemalloc/include/jemalloc/internal/ehooks.h:170 >> #4 0x2a191f60 in ehooks_alloc (tsdn=0x2a2e4060, ehooks=0x2a600080, new_addr=0x0, size=<optimized out>, alignment=4096, zero=0xffff7b87, commit=<optimized out>) >> at /usr/src/contrib/jemalloc/include/jemalloc/internal/ehooks.h:208 >> #5 __je_extent_alloc_wrapper (tsdn=tsdn@entry=0x2a2e4060, pac=0x2a601810, ehooks=<optimized out>, new_addr=<optimized out>, size=4096, alignment=4096, zero=true, commit=0xffff7be7, >> growing_retained=<optimized out>) at jemalloc_extent.c:1003 >> #6 0x2a1916e0 in __je_ecache_alloc_grow (tsdn=<optimized out>, tsdn@entry=0x2a2e4060, pac=pac@entry=0x2a601810, ehooks=ehooks@entry=0x2a600080, ecache=<optimized out>, ecache@entry=0x2a603dd0, >> expand_edata=0x0, size=4096, alignment=4096, zero=<optimized out>, guarded=<optimized out>) at jemalloc_extent.c:126 >> #7 0x2a1c9680 in pac_alloc_real (tsdn=0x2a2e4060, pac=0x2a601810, ehooks=0x2a600080, size=4096, alignment=4096, zero=<optimized out>, guarded=false) at jemalloc_pac.c:124 >> #8 pac_alloc_impl (tsdn=tsdn@entry=0x2a2e4060, self=0x2a601810, size=size@entry=4096, alignment=4096, zero=<optimized out>, guarded=false, frequent_reuse=<optimized out>, >> deferred_work_generated=<optimized out>) at jemalloc_pac.c:178 >> #9 0x2a1c7ae8 in pai_alloc (tsdn=0x2a2e4060, self=0x0, size=4096, alignment=2147483615, zero=<optimized out>, guarded=false, frequent_reuse=true, deferred_work_generated=<optimized out>) >> at /usr/src/contrib/jemalloc/include/jemalloc/internal/pai.h:43 >> #10 __je_pa_alloc (tsdn=tsdn@entry=0x2a2e4060, shard=shard@entry=0x2a601800, size=4096, alignment=<optimized out>, slab=true, szind=1, zero=<optimized out>, guarded=false, >> deferred_work_generated=0xffff7caf) at jemalloc_pa.c:139 >> #11 0x2a16b9f8 in arena_slab_alloc (tsdn=tsdn@entry=0x2a2e4060, arena=0x2a600540, binind=1, binshard=0, bin_info=0x2a21fa8c <__je_bin_infos+48>) at jemalloc_arena.c:839 >> #12 0x2a16ac98 in __je_arena_cache_bin_fill_small (tsdn=0x2a2e4060, arena=0x2a600540, cache_bin=cache_bin@entry=0x2a2e42e8, cache_bin_info=0x2a6004c2, binind=1, nfill=100) at jemalloc_arena.c:1034 >> #13 0x2a1b5694 in __je_tcache_alloc_small_hard (tsdn=0x0, tsdn@entry=0x2a2e4060, arena=0x0, arena@entry=0x2a600540, tcache=tcache@entry=0x2a2e42c8, cache_bin=cache_bin@entry=0x2a2e42e8, binind=1, >> tcache_success=0xffff7d5f) at jemalloc_tcache.c:238 >> #14 0x2a15e538 in tcache_alloc_small (tsd=0x2a2e4060, arena=0x2a600540, tcache=0x2a2e42c8, size=16, binind=1, zero=false, slow_path=<optimized out>) >> at /usr/src/contrib/jemalloc/include/jemalloc/internal/tcache_inlines.h:68 >> #15 arena_malloc (tsdn=<optimized out>, arena=<optimized out>, size=<optimized out>, ind=<optimized out>, zero=<optimized out>, tcache=<optimized out>, slow_path=<optimized out>) >> at /usr/src/contrib/jemalloc/include/jemalloc/internal/arena_inlines_b.h:151 >> #16 iallocztm (tsdn=tsdn@entry=0x2a2e4060, size=<optimized out>, size@entry=16, ind=ind@entry=1, zero=false, tcache=0x2a2e42c8, is_internal=false, arena=0x0, slow_path=<optimized out>) >> at /usr/src/contrib/jemalloc/include/jemalloc/internal/jemalloc_internal_inlines_c.h:55 >> #17 0x2a164df4 in imalloc_no_sample (sopts=0xffff7dfc, dopts=0xffff7ddc, tsd=0x2a2e4060, size=16, usize=16, ind=<optimized out>) at jemalloc_jemalloc.c:2402 >> #18 imalloc_body (sopts=0xffff7dfc, dopts=0xffff7ddc, tsd=0x2a2e4060) at jemalloc_jemalloc.c:2577 >> #19 0x2a156188 in imalloc (sopts=sopts@entry=0xffff7dfc, dopts=<optimized out>, dopts@entry=0xffff7ddc) at jemalloc_jemalloc.c:2693 >> #20 0x2a156000 in __je_malloc_default (size=16) at jemalloc_jemalloc.c:2726 >> #21 0x29e61990 in operator_new_impl (size=16) at /usr/src/contrib/llvm-project/libcxx/src/new.cpp:34 >> #22 operator new (size=<optimized out>) at /usr/src/contrib/llvm-project/libcxx/src/new.cpp:47 >> #23 0x27e101d0 in __libcpp_operator_new<unsigned int> () at /usr/obj/usr/src/arm.armv7/tmp/usr/include/c++/v1/new:265 >> #24 __libcpp_allocate () at /usr/obj/usr/src/arm.armv7/tmp/usr/include/c++/v1/new:289 >> #25 allocate () at /usr/obj/usr/src/arm.armv7/tmp/usr/include/c++/v1/__memory/allocator.h:118 >> #26 __allocate_at_least<std::__1::allocator<char> > () at /usr/obj/usr/src/arm.armv7/tmp/usr/include/c++/v1/__memory/allocate_at_least.h:41 >> #27 __init () at /usr/obj/usr/src/arm.armv7/tmp/usr/include/c++/v1/string:2336 >> #28 basic_string () at /usr/obj/usr/src/arm.armv7/tmp/usr/include/c++/v1/string:1078 >> #29 str () at /usr/src/contrib/llvm-project/llvm/include/llvm/ADT/StringRef.h:217 >> #30 str () at /usr/src/contrib/llvm-project/llvm/lib/Support/Twine.cpp:29 >> #31 0x294076d0 in SetNamePrefix () at /usr/src/contrib/llvm-project/llvm/lib/Transforms/Scalar/SROA.cpp:502 >> #32 visit () at /usr/src/contrib/llvm-project/llvm/lib/Transforms/Scalar/SROA.cpp:2734 >> #33 0x293f4938 in rewritePartition () at /usr/src/contrib/llvm-project/llvm/lib/Transforms/Scalar/SROA.cpp:4893 >> #34 splitAlloca () at /usr/src/contrib/llvm-project/llvm/lib/Transforms/Scalar/SROA.cpp:5284 >> #35 0x293f04ec in runOnAlloca () at /usr/src/contrib/llvm-project/llvm/lib/Transforms/Scalar/SROA.cpp:5485 >> #36 0x293ebfc0 in runSROA () at /usr/src/contrib/llvm-project/llvm/lib/Transforms/Scalar/SROA.cpp:5596 >> #37 0x293eba80 in run () at /usr/src/contrib/llvm-project/llvm/lib/Transforms/Scalar/SROA.cpp:5637 >> #38 0x27b9b32c in llvm::detail::PassModel<llvm::Function, llvm::SROAPass, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) () >> at /usr/src/contrib/llvm-project/llvm/include/llvm/IR/PassManagerInternal.h:90 >> #39 0x276eef80 in run () at /usr/src/contrib/llvm-project/llvm/include/llvm/IR/PassManagerImpl.h:81 >> #40 0x2217fd38 in llvm::detail::PassModel<llvm::Function, llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) () at /usr/src/contrib/llvm-project/llvm/include/llvm/IR/PassManagerInternal.h:90 >> #41 0x276f30e4 in run () at /usr/src/contrib/llvm-project/llvm/lib/IR/PassManager.cpp:124 >> #42 0x22178b88 in llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) () >> at /usr/src/contrib/llvm-project/llvm/include/llvm/IR/PassManagerInternal.h:90 >> #43 0x276ee244 in run () at /usr/src/contrib/llvm-project/llvm/include/llvm/IR/PassManagerImpl.h:81 >> #44 0x22174ffc in RunOptimizationPipeline () at /usr/src/contrib/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1114 >> #45 0x2216cfb8 in EmitAssembly () at /usr/src/contrib/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1179 >> --Type <RET> for more, q to quit, c to continue without paging-- >> #46 EmitBackendOutput () at /usr/src/contrib/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1341 >> #47 0x225cbca0 in HandleTranslationUnit () at /usr/src/contrib/llvm-project/clang/lib/CodeGen/CodeGenAction.cpp:354 >> #48 0x22cff8e4 in ParseAST () at /usr/src/contrib/llvm-project/clang/lib/Parse/ParseAST.cpp:184 >> #49 0x22b5a7b8 in Execute () at /usr/src/contrib/llvm-project/clang/lib/Frontend/FrontendAction.cpp:1078 >> #50 0x22adb800 in ExecuteAction () at /usr/src/contrib/llvm-project/clang/lib/Frontend/CompilerInstance.cpp:1061 >> #51 0x22bf6a90 in ExecuteCompilerInvocation () at /usr/src/contrib/llvm-project/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:280 >> #52 0x0002afc8 in cc1_main () at /usr/src/contrib/llvm-project/clang/tools/driver/cc1_main.cpp:284 >> #53 0x00038548 in ExecuteCC1Tool () at /usr/src/contrib/llvm-project/clang/tools/driver/driver.cpp:215 >> #54 0x227877ec in operator() () at /usr/src/contrib/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:68 >> #55 operator() () at /usr/src/contrib/llvm-project/clang/lib/Driver/Job.cpp:440 >> #56 callback_fn<(lambda at /usr/src/contrib/llvm-project/clang/lib/Driver/Job.cpp:440:22)>(void) () at /usr/src/contrib/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:45 >> #57 0x27d88624 in operator() () at /usr/src/contrib/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:68 >> #58 RunSafely () at /usr/src/contrib/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:426 >> #59 0x22786e90 in Execute () at /usr/src/contrib/llvm-project/clang/lib/Driver/Job.cpp:440 >> #60 0x22748074 in ExecuteCommand () at /usr/src/contrib/llvm-project/clang/lib/Driver/Compilation.cpp:199 >> #61 0x227483d0 in ExecuteJobs () at /usr/src/contrib/llvm-project/clang/lib/Driver/Compilation.cpp:253 >> #62 0x22765bb8 in ExecuteCompilation () at /usr/src/contrib/llvm-project/clang/lib/Driver/Driver.cpp:1943 >> #63 0x00037ba4 in clang_main () at /usr/src/contrib/llvm-project/clang/tools/driver/driver.cpp:391 >> #64 0x000363a8 in main () at /usr/src/usr.bin/clang/clang/clang-driver.cpp:17 >> >> 0x2a80cfd0: 0x000013f2 0x00000079 0xffffffff 0xa5a5a5a5 >> 0x2a80cfe0: 0xffffffff 0xa5a5a5a5 0xffffffff 0xa5a5a5a5 >> 0x2a80cff0: 0x000014a6 0x00000079 0xffffffff 0xa5a5a5a5 >> (gdb) x /1024x (size_t*)addr >> 0x2a80d000: 0x5a5a5a5a 0x5a5a5a5a 0x5a5a5a5a 0x5a5a5a5a >> 0x2a80d010: 0x5a5a5a5a 0x5a5a5a5a 0x5a5a5a5a 0x5a5a5a5a >> 0x2a80d020: 0x5a5a5a5a 0x5a5a5a5a 0x5a5a5a5a 0x5a5a5a5a >> . . . >> 0x2a80dfd0: 0x5a5a5a5a 0x5a5a5a5a 0x5a5a5a5a 0x5a5a5a5a >> 0x2a80dfe0: 0x5a5a5a5a 0x5a5a5a5a 0x5a5a5a5a 0x5a5a5a5a >> 0x2a80dff0: 0x5a5a5a5a 0x5a5a5a5a 0x5a5a5a5a 0x5a5a5a5a >> (gdb) x /1024x ((size_t*)addr)+1024 >> 0x2a80e000: 0x00000051 0x00000002 0x29e862b8 0xa5a5a5a5 >> 0x2a80e010: 0x7273752f 0x6372732f 0x766e692d 0x69747365 >> 0x2a80e020: 0x69746167 0x6c2f6e6f 0x632f6269 0x676e616c >> 0x2a80e030: 0x636e692f 0x6564756c 0x745f5f2f 0x5f657079 >> >> So: All of the page was 0x5a5a5a5a repeated. Before and after >> had some other values and were accessible. >> > > For #0..#15: The original example and the above > agree about: > > #5 __je_extent_alloc_wrapper zero=true > #14 tcache_alloc_small zero=false > #15 __je_extent_alloc_wrapper zero=false #15 was actually optimized out. It was #16 that was zero=false. (But that is outside the common range #0..#15.) > (The others are optimized out.) > === Mark Millard marklmi at yahoo.com
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