Description
Hi, I run the MacPorts automated build system and we have been experiencing an issue for awhile where import numpy causes Python to crash. I don't know if this happens for any users running macOS directly on their Macs but it does happen on one of our build machines—the one running macOS Sierr
6AC8
a 10.12. The other build machines (which run earlier and later macOS versions) don't experience the problem. All the build machines are virtual machines running under VMware ESXi 6 on 2009-model Xserves.
I believe this is similar to or the same as #13059 but in case it's not I didn't want to mix up my information in that issue. In that issue, @eric-wieser speculated that HAVE_XGETBV is being set incorrectly. As my lldb trace below shows, we are crashing at the xgetbv instruction.
@seberg asked in #13059 if the problem was the VM claiming to support AVX when it does not. I have used the sample program posted by @ulido in #10330 to check whether the machine claims to have avx support (using __builtin_cpu_supports("avx")). In my case here in this macOS 10.12 VM, the sample program says "AVX not supported!"
Reproducing code example:
import numpyError message:
I am sorry, I am not familiar with gdb, but here's what happens under lldb:
Process 3114 resuming
Python 3.7.6 (default, Jan 17 2020, 18:32:15)
[Clang 9.0.0 (clang-900.0.39.2)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import numpy
Process 3114 stopped
* thread #2, queue = 'com.apple.main-thread', stop reason = EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0)
frame #0: 0x000000010391c691 _multiarray_umath.cpython-37m-darwin.so`npy_cpu_supports + 118
_multiarray_umath.cpython-37m-darwin.so`npy_cpu_supports:
-> 0x10391c691 <+118>: xgetbv
0x10391c694 <+121>: andl $0x76, %eax
0x10391c697 <+124>: movl $0x76, %ecx
0x10391c69c <+129>: jmp 0x10391c6dc ; <+193>
Target 0: (Python) stopped.
Numpy/Python version information:
Python 3.7.6
Numpy 1.18.1
macOS 10.12.6 Build version 16G2136
Xcode 9.2 Build version 9C40b
Apple LLVM version 9.0.0 (clang-900.0.39.2)