[issue27606] Android cross-built for armv5te with clang and '-mthumb' crashes with SIGSEGV or SIGILL

[Xavier de Gaye]

Xavier de Gaye  added the comment:

ARMV5TE is deprecated in NDK r16 and will be removed in r17.
See https://developer.android.com/ndk/guides/abis.html
Closing as won't fix.

--
resolution:  -> wont fix
stage:  -> resolved
status: open -> closed

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[issue27606] Android cross-built for armv5te with clang and '-mthumb' crashes with SIGSEGV or SIGILL

[Xavier de Gaye]

Changes by Xavier de Gaye :


--
nosy: +thomas-petazzoni

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[issue27606] Android cross-built for armv5te with clang and '-mthumb' crashes with SIGSEGV or SIGILL

[Xavier de Gaye]

Xavier de Gaye added the comment:

The reference to '-mthumb' in the ndk documentation: 
https://developer.android.com/ndk/guides/standalone_toolchain.html#abi.

--

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[issue27606] Android cross-built for armv5te with clang and '-mthumb' crashes with SIGSEGV or SIGILL

[Xavier de Gaye]

Changes by Xavier de Gaye :


Added file: http://bugs.python.org/file43859/logcat.txt

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[issue27606] Android cross-built for armv5te with clang and '-mthumb' crashes with SIGSEGV or SIGILL

[Xavier de Gaye]

Changes by Xavier de Gaye :


Added file: http://bugs.python.org/file43861/logcat-pydebug.txt

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[issue27606] Android cross-built for armv5te with clang and '-mthumb' crashes with SIGSEGV or SIGILL

[Xavier de Gaye]

New submission from Xavier de Gaye:

Android ndk version r11c.

The crash happens very early on python startup.  The SIGILL occurs when python 
is built 'with-pydebug'.

Python runs fine on the armv5te emulator when built with clang without 
'-mthumb'.
Python runs fine on the armv5te emulator when built with gcc 4.9 with or 
without '-mthumb'.

Attaching the strace and logcat output for each type of build.

The backtrace when python is built 'with-pydebug' (but logcat.txt says that the 
SIGSEGV occurs at PyUnicode_DecodeUTF8Stateful when not built 'with-pydebug'):

Program received signal SIGILL, Illegal instruction.
0xb6d77e0a in r_object (p=0xbed89588)
at Python/marshal.c:1340
1340idx = r_ref_reserve(flag, p);
(gdb) bt
#0  0xb6d77e0a in r_object (p=0xbed89588)
at Python/marshal.c:1340
#1  0xb6d76ba2 in PyMarshal_ReadObjectFromString (str=0xb6e5f9ae 
<_Py_M__importlib> "c", len=30106)
at Python/marshal.c:1584
#2  0xb6d72506 in PyImport_ImportFrozenModuleObject (name='_frozen_importlib')
at Python/import.c:1187
#3  0xb6d727ec in PyImport_ImportFrozenModule (name=0xb6e49ac0 
"_frozen_importlib")
at Python/import.c:1236
#4  0xb6d7ff96 in import_init (interp=0xb6919068, sysmod=)
at Python/pylifecycle.c:243
#5  0xb6d7fc80 in _Py_InitializeEx_Private (install_sigs=1, install_importlib=1)
at Python/pylifecycle.c:413
#6  0xb6d80f30 in Py_InitializeEx (install_sigs=1)
at Python/pylifecycle.c:450
#7  0xb6d80f3e in Py_Initialize ()
at Python/pylifecycle.c:456
#8  0xb6daa5e6 in Py_Main (argc=1, argv=0xb6901068)
at Modules/main.c:678
#9  0xb6f9b84c in ?? ()

--
components: Cross-Build
files: strace.txt
messages: 271146
nosy: Alex.Willmer, xdegaye
priority: normal
severity: normal
status: open
title: Android cross-built for armv5te with clang and '-mthumb' crashes with 
SIGSEGV or SIGILL
type: crash
versions: Python 3.6
Added file: http://bugs.python.org/file43858/strace.txt

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[issue27606] Android cross-built for armv5te with clang and '-mthumb' crashes with SIGSEGV or SIGILL

[Xavier de Gaye]

Changes by Xavier de Gaye :


Added file: http://bugs.python.org/file43860/strace-pydebug.txt

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