8281262: Windows builds in different directories are not fully reprod…

…ucible

Backport-of: d442328bc2f2f4bc35dd054487a78552e3d9a759

make/TestImage.gmk

@@ -35,8 +35,8 @@ BUILD_INFO_PROPERTIES := $(TEST_IMAGE_DIR)/build-info.properties
 $(BUILD_INFO_PROPERTIES):
 	$(call MakeTargetDir)
 	$(ECHO) "# Build info properties for JDK tests" > $@
-	$(ECHO) "build.workspace.root=$(call FixPath, $(WORKSPACE_ROOT))" >> $@
-	$(ECHO) "build.output.root=$(call FixPath, $(OUTPUTDIR))" >> $@
+	$(ECHO) 'build.workspace.root=$(call FixPath, $(WORKSPACE_ROOT))' >> $@
+	$(ECHO) 'build.output.root=$(call FixPath, $(OUTPUTDIR))' >> $@
 
 README := $(TEST_IMAGE_DIR)/Readme.txt
 

make/autoconf/flags-cflags.m4

@@ -782,10 +782,8 @@ AC_DEFUN([FLAGS_SETUP_CFLAGS_CPU_DEP],
         test "x$ENABLE_REPRODUCIBLE_BUILD" = xtrue; then
       # There is a known issue with the pathmap if the mapping is made to the
       # empty string. Add a minimal string "s" as prefix to work around this.
-      workspace_root_win=`$FIXPATH_BASE print "${WORKSPACE_ROOT%/}"`
       # PATHMAP_FLAGS is also added to LDFLAGS in flags-ldflags.m4.
-      PATHMAP_FLAGS="-pathmap:${workspace_root_win//\//\\\\}=s \
-          -pathmap:${workspace_root_win}=s"
+      PATHMAP_FLAGS="-pathmap:${WORKSPACE_ROOT}=s"
       FILE_MACRO_CFLAGS="$PATHMAP_FLAGS"
       FLAGS_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [${FILE_MACRO_CFLAGS}],
           PREFIX: $3,

test/jdk/build/AbsPathsInImage.java

@@ -96,6 +96,13 @@ public static void main(String[] args) throws Exception {
         if (buildOutputRoot == null) {
             throw new Error("Could not find build output root, test cannot run");
         }
+        // Validate the root paths
+        if (!Paths.get(buildWorkspaceRoot).isAbsolute()) {
+            throw new Error("Workspace root is not an absolute path: " + buildWorkspaceRoot);
+        }
+        if (!Paths.get(buildOutputRoot).isAbsolute()) {
+            throw new Error("Output root is not an absolute path: " + buildOutputRoot);
+        }
 
         List<byte[]> searchPatterns = new ArrayList<>();
         expandPatterns(searchPatterns, buildWorkspaceRoot);