On 2022-Jan-18, at 19:18, Mark Millard <mark...@yahoo.com> wrote: > It will probably be some time before I get to trying to have a > simpler context, but here is some information, including related > backtraces: > > . . . > "/usr/bin/ld.lld" --eh-frame-hdr -dynamic-linker /libexec/ld-elf.so.1 > --hash-style=both --enable-new-dtags -o > ../cpp_clockinfo_main-ThreadRipper1950X-131072MiB-threads_32-LP64-FreeBSD_main_n247756_348c41d1815d_64bit-clang++_13_O3lto-libc++-xSAN > /usr/lib/crt1.o /usr/lib/crti.o /usr/lib/crtbegin.o -L/usr/lib > -plugin-opt=mcpu=x86-64 -plugin-opt=O3 --whole-archive > /usr/lib/clang/13.0.0/lib/freebsd/libclang_rt.asan-x86_64.a > --no-whole-archive --whole-archive > /usr/lib/clang/13.0.0/lib/freebsd/libclang_rt.asan_cxx-x86_64.a > --no-whole-archive --export-dynamic > ../objs/cpp_thousandslocale-clang++_13_O3lto-libc++-xSAN.o > ../objs/cpp_clockinfo-clang++_13_O3lto-libc++-xSAN.o > /tmp/cpp_clockinfo_main-3fa732.o -lc++ -lm --no-as-needed -lpthread -lrt -lm > -lexecinfo -lgcc --as-needed -lgcc_s --no-as-needed -lpthread -lc -lgcc > --as-needed -lgcc_s --no-as-needed /usr/lib/crtend.o /usr/lib/crtn.o > ================================================================= > ==48532==ERROR: AddressSanitizer: use-after-poison on address 0x621002402688 > at pc 0x000002145504 bp 0x7fffffff9880 sp 0x7fffffff9040 > READ of size 8 at 0x621002402688 thread T0 > #0 0x2145503 in memcpy > /usr/main-src/contrib/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc:827:5 > #1 0x33e77d9 in uninitialized_copy<llvm::MachineMemOperand *const, > llvm::MachineMemOperand *> > /usr/main-src/contrib/llvm-project/llvm/include/llvm/ADT/SmallVector.h:505:7 > #2 0x33e77d9 in append<llvm::MachineMemOperand *const *, void> > /usr/main-src/contrib/llvm-project/llvm/include/llvm/ADT/SmallVector.h:652:5 > #3 0x33e77d9 in > llvm::MachineInstr::cloneMergedMemRefs(llvm::MachineFunction&, > llvm::ArrayRef<llvm::MachineInstr const*>) > /usr/main-src/contrib/llvm-project/llvm/lib/CodeGen/MachineInstr.cpp:448:14 > #4 0x34c936c in mergeOperations > /usr/main-src/contrib/llvm-project/llvm/lib/CodeGen/BranchFolding.cpp:792:19 > #5 0x34c936c in llvm::BranchFolder::mergeCommonTails(unsigned int) > /usr/main-src/contrib/llvm-project/llvm/lib/CodeGen/BranchFolding.cpp:815:7 > #6 0x34c9d01 in > llvm::BranchFolder::TryTailMergeBlocks(llvm::MachineBasicBlock*, > llvm::MachineBasicBlock*, unsigned int) > /usr/main-src/contrib/llvm-project/llvm/lib/CodeGen/BranchFolding.cpp:974:5 > #7 0x34c7869 in > llvm::BranchFolder::TailMergeBlocks(llvm::MachineFunction&) > /usr/main-src/contrib/llvm-project/llvm/lib/CodeGen/BranchFolding.cpp:1132:21 > #8 0x34c6b15 in > llvm::BranchFolder::OptimizeFunction(llvm::MachineFunction&, > llvm::TargetInstrInfo const*, llvm::TargetRegisterInfo const*, > llvm::MachineLoopInfo*, bool) > /usr/main-src/contrib/llvm-project/llvm/lib/CodeGen/BranchFolding.cpp:204:34 > #9 0x34cd7ff in (anonymous > namespace)::BranchFolderPass::runOnMachineFunction(llvm::MachineFunction&) > /usr/main-src/contrib/llvm-project/llvm/lib/CodeGen/BranchFolding.cpp:133:17 > #10 0x33ce97d in llvm::MachineFunctionPass::runOnFunction(llvm::Function&) > /usr/main-src/contrib/llvm-project/llvm/lib/CodeGen/MachineFunctionPass.cpp:72:13 > #11 0x2ed4382 in llvm::FPPassManager::runOnFunction(llvm::Function&) > /usr/main-src/contrib/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:1439:27 > #12 0x2eda342 in llvm::FPPassManager::runOnModule(llvm::Module&) > /usr/main-src/contrib/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:1485:16 > #13 0x2ed4a08 in runOnModule > /usr/main-src/contrib/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:1554:27 > #14 0x2ed4a08 in llvm::legacy::PassManagerImpl::run(llvm::Module&) > /usr/main-src/contrib/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:542:44 > #15 0x2fbb8d8 in codegen(llvm::lto::Config const&, llvm::TargetMachine*, > std::__1::function<std::__1::unique_ptr<llvm::lto::NativeObjectStream, > std::__1::default_delete<llvm::lto::NativeObjectStream> > (unsigned int)>, > unsigned int, llvm::Module&, llvm::ModuleSummaryIndex const&) > /usr/main-src/contrib/llvm-project/llvm/lib/LTO/LTOBackend.cpp:416:17 > #16 0x2fbab37 in llvm::lto::backend(llvm::lto::Config const&, > std::__1::function<std::__1::unique_ptr<llvm::lto::NativeObjectStream, > std::__1::default_delete<llvm::lto::NativeObjectStream> > (unsigned int)>, > unsigned int, llvm::Module&, llvm::ModuleSummaryIndex&) > /usr/main-src/contrib/llvm-project/llvm/lib/LTO/LTOBackend.cpp:515:5 > #17 0x2f2d3db in > llvm::lto::LTO::runRegularLTO(std::__1::function<std::__1::unique_ptr<llvm::lto::NativeObjectStream, > std::__1::default_delete<llvm::lto::NativeObjectStream> > (unsigned int)>) > /usr/main-src/contrib/llvm-project/llvm/lib/LTO/LTO.cpp:1134:13 > #18 0x2f2c7a5 in > llvm::lto::LTO::run(std::__1::function<std::__1::unique_ptr<llvm::lto::NativeObjectStream, > std::__1::default_delete<llvm::lto::NativeObjectStream> > (unsigned int)>, > std::__1::function<std::__1::function<std::__1::unique_ptr<llvm::lto::NativeObjectStream, > std::__1::default_delete<llvm::lto::NativeObjectStream> > (unsigned int)> > (unsigned int, llvm::StringRef)>) > /usr/main-src/contrib/llvm-project/llvm/lib/LTO/LTO.cpp:1033:18 > #19 0x25aa570 in lld::elf::BitcodeCompiler::compile() > /usr/main-src/contrib/llvm-project/lld/ELF/LTO.cpp:316:24 > #20 0x2382c4a in void > lld::elf::LinkerDriver::compileBitcodeFiles<llvm::object::ELFType<(llvm::support::endianness)1, > true> >() /usr/main-src/contrib/llvm-project/lld/ELF/Driver.cpp:1986:31 > #21 0x22fe9c9 in void > lld::elf::LinkerDriver::link<llvm::object::ELFType<(llvm::support::endianness)1, > true> >(llvm::opt::InputArgList&) > /usr/main-src/contrib/llvm-project/lld/ELF/Driver.cpp:2321:3 > #22 0x22db283 in lld::elf::LinkerDriver::linkerMain(llvm::ArrayRef<char > const*>) /usr/main-src/contrib/llvm-project/lld/ELF/Driver.cpp:564:7 > #23 0x22d9f15 in lld::elf::link(llvm::ArrayRef<char const*>, bool, > llvm::raw_ostream&, llvm::raw_ostream&) > /usr/main-src/contrib/llvm-project/lld/ELF/Driver.cpp:122:11 > #24 0x2b28651 in lldMain(int, char const**, llvm::raw_ostream&, > llvm::raw_ostream&, bool) > /usr/main-src/contrib/llvm-project/lld/tools/lld/lld.cpp:146:11 > #25 0x2b28073 in main > /usr/main-src/contrib/llvm-project/lld/tools/lld/lld.cpp:211:12 > > 0x621002402688 is located 3464 bytes inside of 4096-byte region > [0x621002401900,0x621002402900) > allocated by thread T0 here: > #0 0x21adead in operator new(unsigned long) > /usr/main-src/contrib/llvm-project/compiler-rt/lib/asan/asan_new_delete.cpp:95:3 > #1 0x2218a27 in Allocate > /usr/main-src/contrib/llvm-project/llvm/include/llvm/Support/AllocatorBase.h:85:12 > #2 0x2218a27 in llvm::BumpPtrAllocatorImpl<llvm::MallocAllocator, 4096ul, > 4096ul, 128ul>::StartNewSlab() > /usr/main-src/contrib/llvm-project/llvm/include/llvm/Support/Allocator.h:335:21 > #3 0x221873e in llvm::BumpPtrAllocatorImpl<llvm::MallocAllocator, 4096ul, > 4096ul, 128ul>::Allocate(unsigned long, llvm::Align) > /usr/main-src/contrib/llvm-project/llvm/include/llvm/Support/Allocator.h:190:5 > #4 0x33e695a in Allocate > /usr/main-src/contrib/llvm-project/llvm/include/llvm/Support/Allocator.h:204:12 > #5 0x33e695a in allocate<llvm::BumpPtrAllocatorImpl<llvm::MallocAllocator, > 4096, 4096, 128> > > /usr/main-src/contrib/llvm-project/llvm/include/llvm/Support/ArrayRecycler.h:130:38 > #6 0x33e695a in allocateOperandArray > /usr/main-src/contrib/llvm-project/llvm/include/llvm/CodeGen/MachineFunction.h:960:28 > #7 0x33e695a in llvm::MachineInstr::MachineInstr(llvm::MachineFunction&, > llvm::MCInstrDesc const&, llvm::DebugLoc, bool) > /usr/main-src/contrib/llvm-project/llvm/lib/CodeGen/MachineInstr.cpp:127:19 > #8 0x33d4f9e in > llvm::MachineFunction::CreateMachineInstr(llvm::MCInstrDesc const&, > llvm::DebugLoc const&, bool) > /usr/main-src/contrib/llvm-project/llvm/lib/CodeGen/MachineFunction.cpp:352:7 > #9 0x39baa6d in BuildMI > /usr/main-src/contrib/llvm-project/llvm/include/llvm/CodeGen/MachineInstrBuilder.h:349:25 > #10 0x39baa6d in llvm::InstrEmitter::EmitSpecialNode(llvm::SDNode*, bool, > bool, llvm::DenseMap<llvm::SDValue, llvm::Register, > llvm::DenseMapInfo<llvm::SDValue>, llvm::detail::DenseMapPair<llvm::SDValue, > llvm::Register> >&) > /usr/main-src/contrib/llvm-project/llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp:1165:5 > #11 0x39b2e35 in EmitNode > /usr/main-src/contrib/llvm-project/llvm/lib/CodeGen/SelectionDAG/InstrEmitter.h:145:7 > #12 0x39b2e35 in > llvm::ScheduleDAGSDNodes::EmitSchedule(llvm::MachineInstrBundleIterator<llvm::MachineInstr, > false>&)::$_1::operator()(llvm::SDNode*, bool, bool, > llvm::DenseMap<llvm::SDValue, llvm::Register, > llvm::DenseMapInfo<llvm::SDValue>, llvm::detail::DenseMapPair<llvm::SDValue, > llvm::Register> >&) const > /usr/main-src/contrib/llvm-project/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp:872:13 > #13 0x39b248f in > llvm::ScheduleDAGSDNodes::EmitSchedule(llvm::MachineInstrBundleIterator<llvm::MachineInstr, > false>&) > /usr/main-src/contrib/llvm-project/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp:936:22 > #14 0x399c06e in llvm::SelectionDAGISel::CodeGenAndEmitDAG() > /usr/main-src/contrib/llvm-project/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:1006:42 > #15 0x399b447 in > llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) > /usr/main-src/contrib/llvm-project/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:1622:7 > #16 0x3998efd in > llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) > /usr/main-src/contrib/llvm-project/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:509:3 > #17 0x41c35a5 in (anonymous > namespace)::X86DAGToDAGISel::runOnMachineFunction(llvm::MachineFunction&) > /usr/main-src/contrib/llvm-project/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp:193:25 > #18 0x33ce97d in llvm::MachineFunctionPass::runOnFunction(llvm::Function&) > /usr/main-src/contrib/llvm-project/llvm/lib/CodeGen/MachineFunctionPass.cpp:72:13 > #19 0x2ed4382 in llvm::FPPassManager::runOnFunction(llvm::Function&) > /usr/main-src/contrib/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:1439:27 > #20 0x2eda342 in llvm::FPPassManager::runOnModule(llvm::Module&) > /usr/main-src/contrib/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:1485:16 > #21 0x2ed4a08 in runOnModule > /usr/main-src/contrib/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:1554:27 > #22 0x2ed4a08 in llvm::legacy::PassManagerImpl::run(llvm::Module&) > /usr/main-src/contrib/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:542:44 > #23 0x2fbb8d8 in codegen(llvm::lto::Config const&, llvm::TargetMachine*, > std::__1::function<std::__1::unique_ptr<llvm::lto::NativeObjectStream, > std::__1::default_delete<llvm::lto::NativeObjectStream> > (unsigned int)>, > unsigned int, llvm::Module&, llvm::ModuleSummaryIndex const&) > /usr/main-src/contrib/llvm-project/llvm/lib/LTO/LTOBackend.cpp:416:17 > #24 0x2fbab37 in llvm::lto::backend(llvm::lto::Config const&, > std::__1::function<std::__1::unique_ptr<llvm::lto::NativeObjectStream, > std::__1::default_delete<llvm::lto::NativeObjectStream> > (unsigned int)>, > unsigned int, llvm::Module&, llvm::ModuleSummaryIndex&) > /usr/main-src/contrib/llvm-project/llvm/lib/LTO/LTOBackend.cpp:515:5 > #25 0x2f2d3db in > llvm::lto::LTO::runRegularLTO(std::__1::function<std::__1::unique_ptr<llvm::lto::NativeObjectStream, > std::__1::default_delete<llvm::lto::NativeObjectStream> > (unsigned int)>) > /usr/main-src/contrib/llvm-project/llvm/lib/LTO/LTO.cpp:1134:13 > #26 0x2f2c7a5 in > llvm::lto::LTO::run(std::__1::function<std::__1::unique_ptr<llvm::lto::NativeObjectStream, > std::__1::default_delete<llvm::lto::NativeObjectStream> > (unsigned int)>, > std::__1::function<std::__1::function<std::__1::unique_ptr<llvm::lto::NativeObjectStream, > std::__1::default_delete<llvm::lto::NativeObjectStream> > (unsigned int)> > (unsigned int, llvm::StringRef)>) > /usr/main-src/contrib/llvm-project/llvm/lib/LTO/LTO.cpp:1033:18 > #27 0x25aa570 in lld::elf::BitcodeCompiler::compile() > /usr/main-src/contrib/llvm-project/lld/ELF/LTO.cpp:316:24 > #28 0x2382c4a in void > lld::elf::LinkerDriver::compileBitcodeFiles<llvm::object::ELFType<(llvm::support::endianness)1, > true> >() /usr/main-src/contrib/llvm-project/lld/ELF/Driver.cpp:1986:31 > #29 0x22fe9c9 in void > lld::elf::LinkerDriver::link<llvm::object::ELFType<(llvm::support::endianness)1, > true> >(llvm::opt::InputArgList&) > /usr/main-src/contrib/llvm-project/lld/ELF/Driver.cpp:2321:3 > #30 0x22db283 in lld::elf::LinkerDriver::linkerMain(llvm::ArrayRef<char > const*>) /usr/main-src/contrib/llvm-project/lld/ELF/Driver.cpp:564:7 > #31 0x22d9f15 in lld::elf::link(llvm::ArrayRef<char const*>, bool, > llvm::raw_ostream&, llvm::raw_ostream&) > /usr/main-src/contrib/llvm-project/lld/ELF/Driver.cpp:122:11 > #32 0x2b28651 in lldMain(int, char const**, llvm::raw_ostream&, > llvm::raw_ostream&, bool) > /usr/main-src/contrib/llvm-project/lld/tools/lld/lld.cpp:146:11 > #33 0x2b28073 in main > /usr/main-src/contrib/llvm-project/lld/tools/lld/lld.cpp:211:12 > #34 0x212ea5f in _start /usr/main-src/lib/csu/amd64/crt1_c.c:73:7 > #35 0x805007007 (<unknown module>) > > SUMMARY: AddressSanitizer: use-after-poison > /usr/main-src/contrib/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc:827:5 > in memcpy > Shadow bytes around the buggy address: > 0x4c4200480480: f7 f7 f7 f7 f7 f7 00 00 00 00 00 00 00 00 00 00 > 0x4c4200480490: 00 00 00 00 00 00 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 > 0x4c42004804a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > 0x4c42004804b0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 00 00 00 00 00 00 > 0x4c42004804c0: 00 00 00 00 00 00 00 00 00 00 f7 f7 f7 f7 f7 f7 > =>0x4c42004804d0: f7[f7]f7 f7 00 00 00 00 00 00 00 00 00 00 00 00 > 0x4c42004804e0: 00 00 00 00 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 00 00 > 0x4c42004804f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f7 f7 > 0x4c4200480500: f7 f7 f7 f7 f7 f7 f7 f7 00 00 00 00 00 00 00 00 > 0x4c4200480510: 00 00 00 00 00 00 00 00 f7 f7 f7 f7 f7 f7 f7 f7 > 0x4c4200480520: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa > Shadow byte legend (one shadow byte represents 8 application bytes): > Addressable: 00 > Partially addressable: 01 02 03 04 05 06 07 > Heap left redzone: fa > Freed heap region: fd > Stack left redzone: f1 > Stack mid redzone: f2 > Stack right redzone: f3 > Stack after return: f5 > Stack use after scope: f8 > Global redzone: f9 > Global init order: f6 > Poisoned by user: f7 > Container overflow: fc > Array cookie: ac > Intra object redzone: bb > ASan internal: fe > Left alloca redzone: ca > Right alloca redzone: cb > ==48532==ABORTING > clang++: error: linker command failed with exit code 1 (use -v to see > invocation)
Additional context: use of allow_user_poisoning=0 in ASAN_OPTIONS was enough of an addition for lld to finish in my context. > For reference: > > The context is a used-for-chroot installation of a WITH_ASAN= WITH_UBSAN= > build world. > > # uname -apKU > FreeBSD amd64_ZFS 14.0-CURRENT FreeBSD 14.0-CURRENT #30 > main-n252475-e76c0108990b-dirty: Sat Jan 15 21:18:14 PST 2022 > root@amd64_ZFS:/usr/obj/BUILDs/main-amd64-nodbg-clang/usr/main-src/amd64.amd64/sys/GENERIC-NODBG > amd64 amd64 1400047 1400047 > > # ~/fbsd-based-on-what-commit.sh -C /usr/main-src/ > branch: main > merge-base: e76c0108990b52a25f548cba4c0f1b8db59c6b8b > merge-base: CommitDate: 2022-01-16 00:32:36 +0000 > e76c0108990b (HEAD -> main, freebsd/main, freebsd/HEAD) Fix inverse sleep > logic in buf_daemon(). > n252475 (--first-parent --count for merge-base) > === Mark Millard marklmi at yahoo.com
