reprotest/build.py

@@ -9,6 +9,7 @@ import logging
 import os
 import shlex
 import shutil
+import struct
 import random
 import time
 import types
@@ -296,7 +297,27 @@ def kernel(ctx, build, vary):
     if not vary:
         _ = _.append_setup_exec_raw('SETARCH_ARCH=$(uname -m)')
     else:
-        _ = _.append_setup_exec_raw('SETARCH_ARCH=$(setarch --list | grep -vF "$(uname -m)" | shuf | head -n1)')
+        _ = _.append_setup_exec_raw('SETARCH_ARCH=$(setarch --list)')
+        # Perform realistic shuffling of architectures depending
+        # on the bitness of application.
+        # 64-bit binaries can NOT be executed on 32-bit CPU,
+        # so filter out setarch's PER_LINUX32 architectures:
+        #
+        # echo $(grep -ioe "{PER_LINUX.*,.*$" /tmp/setarch.c |
+        #     grep -v machine | grep PER_LINUX32 | awk '{print $2}' | sort -Vu) | sed 's/,//g;s/"//g'
+        _ = _.append_setup_exec_raw('DROP_ARCH="-v -e ^$(uname -m)\$"')
+        _ = _.append_setup_exec_raw('WORDSIZE={}'.format(struct.calcsize("P")*8))
+        _ = _.append_setup_exec_raw('if [ $WORDSIZE -eq 64 ]; then \
+    for _ARCH_TO_DROP in armh armv7b armv7l \
+        armv8b armv8l arm athlon i386 i486 \
+        i586 i686 linux32 mips32 mips parisc32 \
+        parisc ppc32le ppc32 ppcle ppc s390 \
+        sparc32bash sparc32 sparc; \
+    do \
+        DROP_ARCH="$DROP_ARCH -e ^$_ARCH_TO_DROP\$"; \
+    done; \
+fi')
+        _ = _.append_setup_exec_raw('SETARCH_ARCH=$(echo "$SETARCH_ARCH" | grep $DROP_ARCH | shuf | head -n1)')
         _ = _.append_setup_exec_raw('KERNEL_VERSION=$(uname -r)')
         _ = _.append_setup_exec_raw('if [ ${KERNEL_VERSION#2.6} = $KERNEL_VERSION ]; then SETARCH_OPTS=--uname-2.6; fi')
         if ctx.verbosity >= 1: