Stash GCNO files

ci/Jenkinsfile_utils.groovy

@@ -57,22 +57,32 @@ def init_git_win() {
 }
 
 // pack libraries for later use
-def pack_lib(name, libs) {
+def pack_lib(name, libs, include_gcov_data = false) {
   sh """
 echo "Packing ${libs} into ${name}"
 echo ${libs} | sed -e 's/,/ /g' | xargs md5sum
 """
   stash includes: libs, name: name
+
+  if (include_gcov_data) {
+    // Store GCNO files that are required for GCOV to operate during runtime
+    sh "find . -name '*.gcno'"
+    stash name: "${name}_gcov_data", includes: "**.gcno"
+  }
 }
 
 // unpack libraries saved before
-def unpack_and_init(name, libs) {
+def unpack_and_init(name, libs, include_gcov_data = false) {
   init_git()
   unstash name
   sh """
 echo "Unpacked ${libs} from ${name}"
 echo ${libs} | sed -e 's/,/ /g' | xargs md5sum
 """
+  if (include_gcov_data) {
+    // Restore GCNO files that are required for GCOV to operate during runtime
+    unstash "${name}_gcov_data"
+  }
 }
 
 def publish_test_coverage() {

ci/build.py

@@ -218,8 +218,8 @@ def container_run(platform: str,
     # Environment setup
     #
     environment = {
-        'GCOV_PREFIX': '/work/mxnet', # GCOV report directory
-        'GCOV_PREFIX_STRIP': '3',
+ #       'GCOV_PREFIX': '/work/mxnet/gcov_coverage', # GCOV report directory
+ #       'GCOV_PREFIX_STRIP': '2',
         'CCACHE_MAXSIZE': '500G',
         'CCACHE_TEMPDIR': '/tmp/ccache',  # temp dir should be local and not shared
         'CCACHE_DIR': '/work/ccache',  # this path is inside the container as /work/ccache is