Segmentation fault under QEMU / armv7l

[knro]

Been using pyarmor for the last couple of years without any issues. Recently, I moved all code to a new machine (Ryzen 5900X) and install QEMU with Debian buster on it with armv7 architecture. This actually did work for a while but today I started receiving all kinds of segmentation faults when running pyarmor.

I purchased pyarmor.

Version: Tried both release (6.7.4) and From Github (6.7.5)

uname -a: Linux workshop 5.13.6-051306-generic #202107291324-Ubuntu SMP Thu Jul 29 13:34:02 UTC 2021 armv7l GNU/Linux

I deleted .pyarmor directory and then ran:

jasem@workshop:~$ pyarmor -d register pyarmor-regfile-1.zip 
DEBUG    PyArmor installation path: /usr/local/lib/python3.7/dist-packages/pyarmor-6.7.5-py3.7.egg/pyarmor
DEBUG    PyArmor home path: /home/jasem/.pyarmor
INFO     Create pyarmor home path: /home/jasem/.pyarmor
INFO     Create trial license file: /home/jasem/.pyarmor/license.lic
DEBUG    Native platform is linux.armv7
DEBUG    Search dynamic library in the path: /usr/local/lib/python3.7/dist-packages/pyarmor-6.7.5-py3.7.egg/pyarmor/platforms
DEBUG    Search dynamic library in the path: /home/jasem/.pyarmor/platforms
INFO     Create cross platform libraries path /home/jasem/.pyarmor/platforms
INFO     Search library for platform: linux.armv7
DEBUG    Load platform list from /home/jasem/.pyarmor/platforms/index.json
WARNING  The trial version could not download the latest platform library
INFO     Getting remote file: https://github.com/dashingsoft/pyarmor-core/raw/r41.15a/platforms/index.json
INFO     Write cached platform list file /home/jasem/.pyarmor/platforms/index.json
WARNING  The trial version could not download the latest core libraries, tag r41.15a is always used
WARNING  The core library excepted version is r44.18, but got r41.15a from platform list file /home/jasem/.pyarmor/platforms/index.json
INFO     Found available libraries: ['linux.armv7.3']
INFO     Target path for linux.armv7.3: /home/jasem/.pyarmor/platforms/linux/armv7/3
INFO     Downloading library file for linux.armv7.3 ...
WARNING  The trial version could not download the latest platform library
INFO     Getting remote file: https://github.com/dashingsoft/pyarmor-core/raw/r41.15a/platforms/armv7/_pytransform.so
INFO     Writing target file: /home/jasem/.pyarmor/platforms/linux/armv7/3/_pytransform.so
INFO     Download dynamic library linux.armv7.3 OK
qemu: uncaught target signal 11 (Segmentation fault) - core dumped
Segmentation fault

After this, any command (except for pyarmor -h) results in a segmentation fault:

jasem@workshop:~$ pyarmor -d -v
qemu: uncaught target signal 11 (Segmentation fault) - core dumped
Segmentation fault

[jondy]

Please remove this folder,

rm -rf /home/jasem/.pyarmor/platforms

Then use platform linux.armv7.0,

export PYARMOR_PLATFORM=linux.armv7.0
pyarmor ...

[knro]

Thanks! That fixed it. However, the build process I had builds for 3 targets platforms (armv7, aarch64, and x86-64, all linux):

pyarmor obfuscate --platform linux.aarch64.3 text.py 
INFO     PYARMOR_PLATFORM is linux.armv7.0
INFO     PyArmor Version 6.7.5
INFO     Python 3.7.3
INFO     Target platforms: ['linux.aarch64.3']
INFO     Update target platforms to: ['linux.aarch64.3']
INFO     ====================================================
INFO     Reload PyArmor with platform: linux.armv7.3
INFO     ====================================================
INFO     PYARMOR_PLATFORM is linux.armv7.3
qemu: uncaught target signal 11 (Segmentation fault) - core dumped

It used to produce for all 3 architectures without issues using the --platform flag.

[knro]

I don't suppose I need to use export PYARMOR_PLATFORM for each target platform I'm building for?

[jondy]

The problem is linux.armv7.3 doesn't work in your QEMU, only linux.armv7.0 works, refer to
https://pyarmor.readthedocs.io/en/latest/advanced.html#obfuscating-scripts-with-different-features

One solution is to obfuscate all the scripts with feature 0, for example, linux.aarch64.0, but it will reduce the security level.

So I suggest you obfuscate the scripts in the any x86-64 platform, it will obfuscate the scripts with feature 3 by default.

Please also read this section
https://pyarmor.readthedocs.io/en/latest/platforms.html#features