david-seiler opened a new issue #20411:
URL: https://github.com/apache/incubator-mxnet/issues/20411
## Description
I've recently started using the C++ custom operator framework. It's great
and I like it a lot, but for some reason mxnet always segfaults on program exit
when I've loaded a custom operator. This happens with all custom operators,
even the tutorial operator gemm_lib.
This is on OSX Mojave, g++ version "Apple LLVM version 10.0.1
(clang-1001.0.46.4)". mxnet comes from pip, version 1.7.0.post2.
### Error Message
Since it's a segfault there's not a backtrace as such, but here's the tail
of a representative lldb session:
* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS
(code=EXC_I386_GPFLT)
frame #0: 0x0000000118105283
libmxnet.dylib`mxnet::LibraryInitializer::~LibraryInitializer() + 67
libmxnet.dylib`mxnet::LibraryInitializer::~LibraryInitializer:
-> 0x118105283 <+67>: movq (%rcx), %rcx
0x118105286 <+70>: testq %rcx, %rcx
0x118105289 <+73>: jne 0x118105280 ; <+64>
0x11810528b <+75>: jmp 0x1181052b0 ; <+112>
Target 0: (python) stopped.
(lldb) thread backtrace
* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS
(code=EXC_I386_GPFLT)
* frame #0: 0x0000000118105283
libmxnet.dylib`mxnet::LibraryInitializer::~LibraryInitializer() + 67
frame #1: 0x00007fff786ef3cf libsystem_c.dylib`__cxa_finalize_ranges +
319
frame #2: 0x00007fff786ef6b3 libsystem_c.dylib`exit + 55
frame #3: 0x00007fff786493dc libdyld.dylib`start + 8
frame #4: 0x00007fff786493d5 libdyld.dylib`start + 1
## To Reproduce
`make gemm_lib && python test_gemm.py` from [the custom op
tutorial](https://github.com/apache/incubator-mxnet/blob/master/example/extensions/lib_custom_op/README.md)
shows the error for me.
## Things That Didn't Work
Building my own mxnet 1.7.0 from source didn't help. The content of the
custom op doesn't seem to matter either.
## Environment
<details>
<summary>Environment Information</summary>
----------Python Info----------
Version : 3.6.5
Compiler : GCC 4.2.1 Compatible Clang 4.0.1 (tags/RELEASE_401/final)
Build : ('default', 'Apr 26 2018 08:42:37')
Arch : ('64bit', '')
------------Pip Info-----------
Version : 21.1.3
Directory : /Users/davseile/miniconda3/lib/python3.6/site-packages/pip
----------MXNet Info-----------
/Users/davseile/miniconda3/lib/python3.6/site-packages/sklearn/externals/joblib/externals/cloudpickle/cloudpickle.py:47:
DeprecationWarning: the imp module is deprecated in favour of importlib; see
the module's documentation for alternative uses
import imp
Version : 1.7.0
Directory : /Users/davseile/miniconda3/lib/python3.6/site-packages/mxnet
Commit Hash : 64f737cdd59fe88d2c5b479f25d011c5156b6a8a
Library :
['/Users/davseile/miniconda3/lib/python3.6/site-packages/mxnet/libmxnet.dylib']
Build features:
✖ CUDA
✖ CUDNN
✖ NCCL
✖ CUDA_RTC
✖ TENSORRT
✔ CPU_SSE
✔ CPU_SSE2
✔ CPU_SSE3
✔ CPU_SSE4_1
✖ CPU_SSE4_2
✖ CPU_SSE4A
✖ CPU_AVX
✖ CPU_AVX2
✖ OPENMP
✖ SSE
✖ F16C
✖ JEMALLOC
✖ BLAS_OPEN
✖ BLAS_ATLAS
✖ BLAS_MKL
✔ BLAS_APPLE
✔ LAPACK
✔ MKLDNN
✔ OPENCV
✖ CAFFE
✖ PROFILER
✖ DIST_KVSTORE
✖ CXX14
✖ INT64_TENSOR_SIZE
✔ SIGNAL_HANDLER
✖ DEBUG
✖ TVM_OP
----------System Info----------
Platform : Darwin-18.7.0-x86_64-i386-64bit
system : Darwin
node : 00e04c166570
release : 18.7.0
version : Darwin Kernel Version 18.7.0: Mon May 3 20:41:19 PDT 2021;
root:xnu-4903.278.68~1/RELEASE_X86_64
----------Hardware Info----------
machine : x86_64
processor : i386
b'machdep.cpu.brand_string: Intel(R) Core(TM) i7-7660U CPU @ 2.50GHz'
b'machdep.cpu.features: FPU VME DE PSE TSC MSR PAE MCE CX8 APIC SEP MTRR PGE
MCA CMOV PAT PSE36 CLFSH DS ACPI MMX FXSR SSE SSE2 SS HTT TM PBE SSE3 PCLMULQDQ
DTES64 MON DSCPL VMX SMX EST TM2 SSSE3 FMA CX16 TPR PDCM SSE4.1 SSE4.2 x2APIC
MOVBE POPCNT AES PCID XSAVE OSXSAVE SEGLIM64 TSCTMR AVX1.0 RDRAND F16C'
b'machdep.cpu.leaf7_features: RDWRFSGS TSC_THREAD_OFFSET SGX BMI1 HLE AVX2
SMEP BMI2 ERMS INVPCID RTM FPU_CSDS MPX RDSEED ADX SMAP CLFSOPT IPT MDCLEAR
TSXFA IBRS STIBP L1DF SSBD'
b'machdep.cpu.extfeatures: SYSCALL XD 1GBPAGE EM64T LAHF LZCNT PREFETCHW
RDTSCP TSCI'
----------Network Test----------
Setting timeout: 10
Timing for MXNet: https://github.com/apache/incubator-mxnet, DNS: 0.0430
sec, LOAD: 0.7044 sec.
Timing for Gluon Tutorial(en): http://gluon.mxnet.io, DNS: 0.0961 sec, LOAD:
0.5755 sec.
Error open Gluon Tutorial(cn): https://zh.gluon.ai, <urlopen error [SSL:
CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:833)>, DNS
finished in 0.08476710319519043 sec.
Timing for FashionMNIST:
https://apache-mxnet.s3-accelerate.dualstack.amazonaws.com/gluon/dataset/fashion-mnist/train-labels-idx1-ubyte.gz,
DNS: 0.0732 sec, LOAD: 0.3876 sec.
Timing for PYPI: https://pypi.python.org/pypi/pip, DNS: 0.0459 sec, LOAD:
1.0816 sec.
Error open Conda: https://repo.continuum.io/pkgs/free/, HTTP Error 403:
Forbidden, DNS finished in 0.06121397018432617 sec.
----------Environment----------
</details>
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