help timeout ut debug (#31500)

* To help timeout_ut debug

* To help timeout_ut debug

* added show information

paddle/scripts/paddle_build.sh

@@ -1238,6 +1238,9 @@ set +x
         exec_retry_threshold=10
         is_retry_execuate=0
         if [ -n "$failed_test_lists" ];then
+            if [ ${TIMEOUT_DEBUG_HELP:-OFF} == "ON" ];then
+                bash $PADDLE_ROOT/tools/timeout_debug_help.sh "$failed_test_lists"    # cat logs for tiemout uts which killed by ctest
+            fi
             read need_retry_ut_str <<< $(echo "$failed_test_lists" | grep -oEi "\-.+\(.+\)" | sed 's/(.\+)//' | sed 's/- //' )
             need_retry_ut_arr=(${need_retry_ut_str})
             need_retry_ut_count=${#need_retry_ut_arr[@]}

tools/timeout_debug_help.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+
+# Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
+# 
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+# 
+#     http://www.apache.org/licenses/LICENSE-2.0
+# 
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+set +e
+failed_uts=$1
+need_debug_ut_re='test_dist_fleet'
+cat_log_judge=$(echo "${failed_uts}" | grep 'Timeout' |  grep -oEi "$need_debug_ut_re" )
+if [[ "$cat_log_judge" != "" ]];then 
+    echo "=============================================="
+    echo "show timeout ut logs"
+    echo "=============================================="
+    cat /tmp/tr0_err.log /tmp/tr1_err.log /tmp/ps0_err.log /tmp/ps1_err.log
+    cat /tmp/heter0_err.log /tmp/heter1_err.log
+fi
+set -e