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)
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
