Date: Tue, 18 Nov 2025 10:18:04 -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" on armv7 buildworld [gdb backtrace!] Message-ID: <3174F751-9853-4697-B0C0-98B54518A69F@yahoo.com> In-Reply-To: <13E753F4-84F8-4ADB-96B6-908897D6971C@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>
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I modified system clang to not register its 2 SIGABRT handlers.
The backtrace has the jemalloc call stack activity as well.
(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=0x2b629000, size=size@entry=12288) 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=0xffff6f17, 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=12288, alignment=4096, zero=true, commit=0xffff6f77,
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=12288, 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=12288, 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=12288, 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=12288, 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=12288, alignment=<optimized out>, slab=true, szind=25, zero=<optimized out>, guarded=false,
deferred_work_generated=0xffff703f) at jemalloc_pa.c:139
#11 0x2a16b9f8 in arena_slab_alloc (tsdn=tsdn@entry=0x2a2e4060, arena=0x2a600540, binind=25, binshard=0, bin_info=0x2a21ff0c <__je_bin_infos+1200>) at jemalloc_arena.c:839
#12 0x2a16ac98 in __je_arena_cache_bin_fill_small (tsdn=0x2a2e4060, arena=0x2a600540, cache_bin=cache_bin@entry=0x2a2e4528, cache_bin_info=0x2a6004f2, binind=25, nfill=5) 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=0x2a2e4528, binind=25,
tcache_success=0xffff70ef) at jemalloc_tcache.c:238
#14 0x2a16cef4 in tcache_alloc_small (tsd=<optimized out>, arena=0x2a600540, tcache=0x2a2e42c8, size=<optimized out>, binind=25, zero=false, slow_path=true)
at /usr/src/contrib/jemalloc/include/jemalloc/internal/tcache_inlines.h:68
#15 arena_malloc (tsdn=<optimized out>, arena=<optimized out>, size=1536, ind=25, zero=false, tcache=0x2a2e42c8, slow_path=true)
at /usr/src/contrib/jemalloc/include/jemalloc/internal/arena_inlines_b.h:151
#16 0x2a16cb88 in __je_arena_palloc (tsdn=0x0, tsdn@entry=0x2a2e4060, arena=<optimized out>, usize=<optimized out>, usize@entry=1536, alignment=alignment@entry=8, zero=false, tcache=0x2a2e42c8)
at jemalloc_arena.c:1224
#17 0x2a16559c in ipallocztm (tsdn=0x2a2e4060, tsdn@entry=0x2a2e42c8, usize=1536, alignment=8, zero=false, tcache=0x2a2e42c8, is_internal=false, arena=0x0)
at /usr/src/contrib/jemalloc/include/jemalloc/internal/jemalloc_internal_inlines_c.h:80
#18 ipalloct (tsdn=0x0, tsdn@entry=0x2a2e4060, usize=1536, alignment=8, zero=false, tcache=0x2a2e42c8, arena=0x0)
at /usr/src/contrib/jemalloc/include/jemalloc/internal/jemalloc_internal_inlines_c.h:91
#19 0x2a1651f4 in imalloc_no_sample (sopts=0xffff71e4, dopts=0xffff71c4, tsd=0x2a2e4060, size=1536, usize=1536, ind=<optimized out>) at jemalloc_jemalloc.c:2398
#20 imalloc_body (sopts=0xffff71e4, dopts=0xffff71c4, tsd=0x2a2e4060) at jemalloc_jemalloc.c:2577
#21 0x2a156188 in imalloc (sopts=sopts@entry=0xffff71e4, dopts=<optimized out>, dopts@entry=0xffff71c4) at jemalloc_jemalloc.c:2693
#22 0x2a15677c in __aligned_alloc (alignment=8, size=1536) at jemalloc_jemalloc.c:2821
#23 0x29e61a00 in std::__1::__libcpp_aligned_alloc[abi:se190107](unsigned int, unsigned int) (__alignment=8, __size=<optimized out>)
at /usr/src/contrib/llvm-project/libcxx/include/__memory/aligned_alloc.h:43
#24 operator_new_aligned_impl (size=<optimized out>, alignment=8) at /usr/src/contrib/llvm-project/libcxx/src/new.cpp:129
#25 operator new (size=<optimized out>, alignment=<optimized out>) at /usr/src/contrib/llvm-project/libcxx/src/new.cpp:141
#26 0x2631dde0 in allocateBuckets () at /usr/src/contrib/llvm-project/llvm/include/llvm/ADT/DenseMap.h:915
#27 grow () at /usr/src/contrib/llvm-project/llvm/include/llvm/ADT/DenseMap.h:849
#28 0x2631dd0c in grow () at /usr/src/contrib/llvm-project/llvm/include/llvm/ADT/DenseMap.h:580
#29 0x2631dd0c in InsertIntoBucketImpl<llvm::BasicBlock const*> () from /usr/lib/libprivatellvm.so.19
#30 0x2631daa4 in InsertIntoBucket<llvm::BasicBlock const* const&> () at /usr/src/contrib/llvm-project/llvm/include/llvm/ADT/DenseMap.h:590
#31 FindAndConstruct () at /usr/src/contrib/llvm-project/llvm/include/llvm/ADT/DenseMap.h:369
#32 0x2631d49c in operator[] () at /usr/src/contrib/llvm-project/llvm/include/llvm/ADT/DenseMap.h:373
#33 analyzeBasicBlock () at /usr/src/contrib/llvm-project/llvm/lib/Analysis/CodeMetrics.cpp:234
#34 0x28e2c3ec in run () at /usr/src/contrib/llvm-project/llvm/lib/Transforms/IPO/FunctionSpecialization.cpp:643
#35 0x28f4fd70 in runIPSCCP () at /usr/src/contrib/llvm-project/llvm/lib/Transforms/IPO/SCCP.cpp:165
#36 run () at /usr/src/contrib/llvm-project/llvm/lib/Transforms/IPO/SCCP.cpp:403
#37 0x27b85d14 in llvm::detail::PassModel<llvm::Module, llvm::IPSCCPPass, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) ()
at /usr/src/contrib/llvm-project/llvm/include/llvm/IR/PassManagerInternal.h:90
#38 0x276ee244 in run () at /usr/src/contrib/llvm-project/llvm/include/llvm/IR/PassManagerImpl.h:81
#39 0x22174ffc in RunOptimizationPipeline () at /usr/src/contrib/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1114
#40 0x2216cfb8 in EmitAssembly () at /usr/src/contrib/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1179
#41 EmitBackendOutput () at /usr/src/contrib/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1341
#42 0x225cbca0 in HandleTranslationUnit () at /usr/src/contrib/llvm-project/clang/lib/CodeGen/CodeGenAction.cpp:354
#43 0x22cff8e4 in ParseAST () at /usr/src/contrib/llvm-project/clang/lib/Parse/ParseAST.cpp:184
#44 0x22b5a7b8 in Execute () at /usr/src/contrib/llvm-project/clang/lib/Frontend/FrontendAction.cpp:1078
--Type <RET> for more, q to quit, c to continue without paging--
#45 0x22adb800 in ExecuteAction () at /usr/src/contrib/llvm-project/clang/lib/Frontend/CompilerInstance.cpp:1061
#46 0x22bf6a90 in ExecuteCompilerInvocation () at /usr/src/contrib/llvm-project/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:280
#47 0x0002afc8 in cc1_main () at /usr/src/contrib/llvm-project/clang/tools/driver/cc1_main.cpp:284
#48 0x00038548 in ExecuteCC1Tool () at /usr/src/contrib/llvm-project/clang/tools/driver/driver.cpp:215
#49 0x227877ec in operator() () at /usr/src/contrib/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:68
#50 operator() () at /usr/src/contrib/llvm-project/clang/lib/Driver/Job.cpp:440
#51 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
#52 0x27d88624 in operator() () at /usr/src/contrib/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:68
#53 RunSafely () at /usr/src/contrib/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:426
#54 0x22786e90 in Execute () at /usr/src/contrib/llvm-project/clang/lib/Driver/Job.cpp:440
#55 0x22748074 in ExecuteCommand () at /usr/src/contrib/llvm-project/clang/lib/Driver/Compilation.cpp:199
#56 0x227483d0 in ExecuteJobs () at /usr/src/contrib/llvm-project/clang/lib/Driver/Compilation.cpp:253
#57 0x22765bb8 in ExecuteCompilation () at /usr/src/contrib/llvm-project/clang/lib/Driver/Driver.cpp:1943
#58 0x00037ba4 in clang_main () at /usr/src/contrib/llvm-project/clang/tools/driver/driver.cpp:391
#59 0x000363a8 in main () at /usr/src/usr.bin/clang/clang/clang-driver.cpp:17
For reference:
. . .
Building /usr/obj/usr/src-investigation/arm.armv7/lib/clang/libclang/CodeGen/BackendUtil.pico
. . .
Building /usr/obj/usr/src-investigation/arm.armv7/lib/clang/libclang/CodeGen/CGDecl.pico
<jemalloc>: /usr/src/contrib/jemalloc/include/jemalloc/internal/ehooks.h:170: Failed assertion: "p[i] == 0"
. . .
_ERROR_CMD='c++ -target armv7-gnueabihf-freebsd16.0 --sysroot=/usr/obj/usr/src-investigation/arm.armv7/tmp -B/usr/obj/usr/src-investigation/arm.armv7/tmp/usr/bin -fpic -DPIC -UPIC -O2 -pipe -fno-common -I/usr/obj/usr/src-investigation/arm.armv7/lib/clang/libclang -I/usr/obj/usr/src-investigation/arm.armv7/lib/clang/libllvm -I/usr/src-investigation/contrib/llvm-project/clang/lib/Basic -I/usr/src-investigation/contrib/llvm-project/clang/lib/Driver -I/usr/src-investigation/contrib/llvm-project/clang/lib/CodeGen -I/usr/src-investigation/contrib/llvm-project/clang/include -DCLANG_ENABLE_ARCMT -DCLANG_ENABLE_STATIC_ANALYZER -I/usr/src-investigation/lib/clang/include -I/usr/src-investigation/contrib/llvm-project/llvm/include -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -DHAVE_VCS_VERSION_INC -DLLVM_DEFAULT_TARGET_TRIPLE=\"armv7-unknown-freebsd16.0-gnueabihf\" -DLLVM_HOST_TRIPLE=\"armv7-unknown-freebsd16.0\" -DDEFAULT_SYSROOT=\"\" -DLLVM_TARGET_ENABLE_AARCH64 -DLLVM_TARGET_ENABLE_ARM -DLLVM_TARGET_ENABLE_POWERPC -DLLVM_TARGET_ENABLE_RISCV -DLLVM_TARGET_ENABLE_X86 -DLLVM_NATIVE_ASMPARSER=LLVMInitializeARMAsmParser -DLLVM_NATIVE_ASMPRINTER=LLVMInitializeARMAsmPrinter -DLLVM_NATIVE_DISASSEMBLER=LLVMInitializeARMDisassembler -DLLVM_NATIVE_TARGET=LLVMInitializeARMTarget -DLLVM_NATIVE_TARGETINFO=LLVMInitializeARMTargetInfo -DLLVM_NATIVE_TARGETMC=LLVMInitializeARMTargetMC -ffunction-sections -fdata-sections -gline-tables-only -Wno-format-zero-length -fstack-protector-strong -Wdate-time -Wno-empty-body -Wno-string-plus-int -Wno-unused-const-variable -Wno-error=unused-but-set-parameter -Wno-error=cast-function-type-mismatch -Wno-tautological-compare -Wno-unused-value -Wno-parentheses-equality -Wno-unused-function -Wno-enum-conversion -Wno-unused-local-typedef -Wno-address-of-packed-member -Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter -Wno-parentheses -Qunused-arguments -fno-exceptions -fno-rtti -gline-tables-only -std=c++17 -stdlib=libc++ -c /usr/src-investigation/contrib/llvm-project/clang/lib/CodeGen/BackendUtil.cpp -o CodeGen/BackendUtil.pico;'
===
Mark Millard
marklmi at yahoo.com
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