gh-actions: print elf alignment

Author: ignoramous

.github/workflows/go.yml

@@ -99,6 +99,38 @@ jobs:
         #  WHERE tag = 'DW_TAG_subprogram'
         #  ORDER BY function_size DESC
         #  LIMIT 50;"
+        readelf -l jni/arm64-v8a/*.so
+
+        # from: cs.android.com/android/platform/superproject/main/+/main:system/extras/tools/check_elf_alignment.sh;drc=97bcb31779;l=87
+        RED="\e[31m"
+        GREEN="\e[32m"
+        ENDCOLOR="\e[0m"
+
+        unaligned_libs=()
+
+        echo
+        echo "=== ELF alignment ==="
+
+        matches="$(find jni/arm64-v8a/ -type f)"
+        IFS=$'\n'
+        for match in $matches; do
+          [[ $(file "${match}") == *"ELF"* ]] || continue
+
+          res="$(objdump -p "${match}" | grep LOAD | awk '{ print $NF }' | head -1)"
+          if [[ $res =~ 2\*\*(1[4-9]|[2-9][0-9]|[1-9][0-9]{2,}) ]]; then
+            echo -e "${match}: ${GREEN}ALIGNED${ENDCOLOR} ($res)"
+          else
+            echo -e "${match}: ${RED}UNALIGNED${ENDCOLOR} ($res)"
+            unaligned_libs+=("${match}")
+          fi
+        done
+
+        if [ ${#unaligned_libs[@]} -gt 0 ]; then
+          echo -e "${RED}Found ${#unaligned_libs[@]} unaligned libs (only arm64-v8a/x86_64 libs need to be aligned).${ENDCOLOR}"
+        elif [ -n "${dir_filename}" ]; then
+          echo -e "ELF Verification Successful"
+        fi
+        echo "====================="
       shell: bash
 
       # github.com/actions/upload-artifact