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From: Vincent Li <vincent.mc.li@gmail.com>
To: bpf <bpf@vger.kernel.org>
Subject: llvm-objdump bpf coredump
Date: Fri, 17 Sep 2021 18:34:23 -0700	[thread overview]
Message-ID: <CAK3+h2wW-tWOT+VBOc8QjRcbhMX3dCpsvE9if4VOA8s7R2icjg@mail.gmail.com> (raw)

Hi,

I am supposed to file a bug report in https://bugs.llvm.org/ but the
site requires account login, while waiting for my account setup, and
since this is related to BPF, I will try my luck here :)

This is cilium environment, when I use llvm-objdump to disassemble the
bpf_lxc.o like below, it core dumps

#llvm-objdump -S -D  /var/run/cilium/state/2799/bpf_lxc.o >
/home/bpf_lxc-5.4.txt

PLEASE submit a bug report to https://bugs.llvm.org/ and include the
crash backtrace.

Stack dump:

0. Program arguments: llvm-objdump -S -D /var/run/cilium/state/2799/bpf_lxc.o

 #0 0x00000000006336bc llvm::sys::PrintStackTrace(llvm::raw_ostream&,
int) (/usr/local/bin/llvm-objdump+0x6336bc)

 #1 0x00000000006318a4 llvm::sys::RunSignalHandlers()
(/usr/local/bin/llvm-objdump+0x6318a4)

 #2 0x0000000000631efd SignalHandler(int) (/usr/local/bin/llvm-objdump+0x631efd)

 #3 0x00007f9f39a7fb20 __restore_rt (/lib64/libpthread.so.0+0x12b20)

 #4 0x0000000000492e8b
llvm::BPFInstPrinter::printMemOperand(llvm::MCInst const*, int,
llvm::raw_ostream&, char const*)
(/usr/local/bin/llvm-objdump+0x492e8b)

 #5 0x00000000004946c0 llvm::BPFInstPrinter::printInst(llvm::MCInst
const*, unsigned long, llvm::StringRef, llvm::MCSubtargetInfo const&,
llvm::raw_ostream&) (/usr/local/bin/llvm-objdump+0x4946c0)

 #6 0x0000000000432351 (anonymous
namespace)::BPFPrettyPrinter::printInst(llvm::MCInstPrinter&,
llvm::MCInst const*, llvm::ArrayRef<unsigned char>,
llvm::object::SectionedAddress, llvm::formatted_raw_ostream&,
llvm::StringRef, llvm::MCSubtargetInfo const&, (anonymous
namespace)::SourcePrinter*, llvm::StringRef,
std::vector<llvm::object::RelocationRef,
std::allocator<llvm::object::RelocationRef> >*, (anonymous
namespace)::LiveVariablePrinter&)
(/usr/local/bin/llvm-objdump+0x432351)

 #7 0x00000000004400b8 disassembleObject(llvm::Target const*,
llvm::object::ObjectFile const*, llvm::MCContext&,
llvm::MCDisassembler*, llvm::MCDisassembler*, llvm::MCInstrAnalysis
const*, llvm::MCInstPrinter*, llvm::MCSubtargetInfo const*,
llvm::MCSubtargetInfo const*, (anonymous namespace)::PrettyPrinter&,
(anonymous namespace)::SourcePrinter&, bool)
(/usr/local/bin/llvm-objdump+0x4400b8)

 #8 0x000000000044444e disassembleObject(llvm::object::ObjectFile
const*, bool) (/usr/local/bin/llvm-objdump+0x44444e)

 #9 0x00000000004454e2 dumpObject(llvm::object::ObjectFile*,
llvm::object::Archive const*, llvm::object::Archive::Child const*)
(/usr/local/bin/llvm-objdump+0x4454e2)

#10 0x0000000000409910 main (/usr/local/bin/llvm-objdump+0x409910)

#11 0x00007f9f3854c493 __libc_start_main (/lib64/libc.so.6+0x23493)

#12 0x000000000042384e _start (/usr/local/bin/llvm-objdump+0x42384e)

Segmentation fault (core dumped)

I compiled and installed llvm and clang 12.0.1 myself

             reply	other threads:[~2021-09-18  1:34 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-18  1:34 Vincent Li [this message]
2021-09-18  3:00 ` llvm-objdump bpf coredump Yonghong Song
2021-09-18 15:41   ` Vincent Li
2021-09-19 23:36     ` Yonghong Song

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