Enable automatic gdb stacktrace in QTest, in case a test crashes

On Linux, this requires that gdb can be found in PATH, and that no
kernel security settings like yama.ptrace_scope  prevent it.

Patch contains also a drive-by architecture detection fix for Debian arm64.

Fixes: QTQAINFRA-6029
Fixes: QTQAINFRA-5940
Fixes: QTQAINFRA-6030
Fixes: QTQAINFRA-6046
Fixes: QTQAINFRA-6012
Fixes: QTQAINFRA-5930
Task-number: QTQAINFRA-5933
Change-Id: Ie6debde94c1cc5783161ffa7354b58734c372702
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>
Reviewed-by: Toni Saario <toni.saario@qt.io>
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

2 files changed, 36 insertions, 1 deletions

diff --git a/coin/provisioning/common/linux/enable_test_stacktraces.sh b/coin/provisioning/common/linux/enable_test_stacktraces.sh
new file mode 100755
index 00000000..ee9d4d23
--- /dev/null
+++ b/coin/provisioning/common/linux/enable_test_stacktraces.sh
@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+#Copyright (C) 2023 The Qt Company Ltd
+#SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+### Enable automatic stacktraces in case of fatal errors in QTest.
+# This requires that gdb can be found in PATH, and that no
+# kernel security settings like yama.ptrace_scope  prevent it.
+
+
+PROVISIONING_DIR="$(dirname "$0")/../.."
+source "$PROVISIONING_DIR/common/unix/common.sourced.sh"
+
+
+f="/etc/sysctl.d/10-ptrace.conf"
+if [ -f $f ]
+then
+    echo "Modifying $f ..."
+    sudo sed -i '/^kernel\.yama\.ptrace_scope *= *[1-9]$/s/[1-9]$/0/'  $f
+    # Reload the modified setting, so that we can verify it right afterwards.
+    sudo sysctl -p  $f
+fi
+
+# Verify that yama.ptrace_scope = 0, if it's supported by the kernel.
+ptrace_scope_value=`sudo sysctl kernel.yama.ptrace_scope 2>/dev/null \
+    | sed -E 's/.*([0-9])$/\1/'`
+if [ -n "$ptrace_scope_value" ] && [ "$ptrace_scope_value" != 0 ]
+then
+    fatal "kernel.yama.ptrace_scope = $ptrace_scope_value \
+        which means that QTest automatic stacktraces will not work"
+else
+    echo kernel.yama.ptrace_scope = "$ptrace_scope_value"
+fi
+
+
+$CMD_PKG_INSTALL  gdb
diff --git a/coin/provisioning/common/unix/common.sourced.sh b/coin/provisioning/common/unix/common.sourced.sh
index e93c1cba..c15d9453 100755
--- a/coin/provisioning/common/unix/common.sourced.sh
+++ b/coin/provisioning/common/unix/common.sourced.sh
@@ -108,7 +108,7 @@ set_common_environment () {
     uname_m="$(uname -m)"
     case "$uname_m" in
         x86_64|amd64) PROVISIONING_ARCH=amd64 ;;
-        arm64) PROVISIONING_ARCH=arm64 ;;
+        aarch64|arm64)PROVISIONING_ARCH=arm64 ;;
         i[3456]86)    PROVISIONING_ARCH=x86  ;;
         *) fatal "Unknown architecture in uname: $uname_m" 43 ;;
     esac