Add introspection for readelf

Author: am11

eng/native/configuretools.cmake

@@ -53,6 +53,7 @@ if(NOT WIN32 AND NOT CLR_CMAKE_TARGET_BROWSER AND NOT CLR_CMAKE_TARGET_WASI)
 
   if(NOT CLR_CMAKE_TARGET_APPLE AND (NOT CLR_CMAKE_TARGET_ANDROID OR CROSS_ROOTFS))
     locate_toolchain_exec(objdump CMAKE_OBJDUMP YES)
+    locate_toolchain_exec(readelf CMAKE_READELF YES)
 
     unset(CMAKE_OBJCOPY CACHE)
     locate_toolchain_exec(objcopy CMAKE_OBJCOPY NO)

eng/native/genmoduleindex.sh

@@ -5,7 +5,7 @@
 set -euo pipefail
 
 if [[ "$#" -lt 2 ]]; then
-  echo "Usage: genmoduleindex.sh ModuleBinaryFile IndexHeaderFile"
+  echo "Usage: genmoduleindex.sh ModuleBinaryFile IndexHeaderFile readelfBinaryPath"
   exit 1
 fi
 
@@ -25,16 +25,18 @@ function printIdAsBinary() {
 
 case "$(uname -s)" in
 Darwin)
-  cmd="dwarfdump -u $1"
+  cmd="dwarfdump"
+  arg="-u"
   pattern='^UUID: ([0-9A-Fa-f\-]+)';;
 *)
-  cmd="readelf -n $1"
+  cmd="$3"
+  arg="-n"
   pattern='^[[:space:]]*Build ID: ([0-9A-Fa-f\-]+)';;
 esac
 
-while read -r line; do
+"$cmd" "$arg" "$1" | while read -r line; do
   if [[ "$line" =~ $pattern ]]; then
     printIdAsBinary "${BASH_REMATCH[1]//-/}"
     break
   fi
-done < <(eval "$cmd") > "$2"
+done > "$2"

src/coreclr/debug/runtimeinfo/CMakeLists.txt

@@ -15,7 +15,7 @@ function(generate_module_index Target ModuleIndexFile)
 
     add_custom_command(
         OUTPUT ${ModuleIndexFile}
-        COMMAND ${CLR_ENG_NATIVE_DIR}/genmoduleindex${scriptExt} $<TARGET_FILE:${Target}> ${ModuleIndexFile}
+        COMMAND ${CLR_ENG_NATIVE_DIR}/genmoduleindex${scriptExt} $<TARGET_FILE:${Target}> ${ModuleIndexFile} ${CMAKE_READELF}
         DEPENDS ${Target}
         COMMENT "Generating ${Target} module index file -> ${ModuleIndexFile}"
     )