Add details about app resources to build output.

Author: fniephaus

docs/reference-manual/native-image/BuildOutput.md

@@ -29,7 +29,7 @@ GraalVM Native Image: Generating 'helloworld' (executable)...
 [6/7] Compiling methods...    [**]                               (3.7s @ 2.38GB)
 [7/7] Creating image...                                          (2.1s @ 1.04GB)
    3.69MB (27.19%) for code area:    6,955 compilation units
-   5.86MB (43.18%) for image heap:   80,528 objects
+   5.86MB (43.18%) for image heap:   80,528 objects and 5 resources
    3.05MB (22.46%) for debug info generated in 1.0s
  997.25KB ( 7.18%) for other data
   13.57MB in total
@@ -133,12 +133,15 @@ The code area contains machine code produced by the Graal compiler for all reach
 Therefore, reducing the number of [reachable methods](#glossary-reachability) also reduces the size of the code area.
 
 #### <a name="glossary-image-heap"></a>Image Heap
-The image heap contains reachable objects such as static application data, metadata, and `byte[]` for different purposes.
+The image heap contains reachable objects such as static application data, metadata, and `byte[]` for different purposes (see below).
 
 ##### <a name="glossary-general-heap-data"></a>General Heap Data Stored in `byte[]`
 The total size of all `byte[]` objects that are neither used for `java.lang.String`, nor [code metadata](#glossary-code-metadata), nor [reflection metadata](#glossary-reflection-metadata), nor [graph encodings](#glossary-graph-encodings).
 Therefore, this can also include `byte[]` objects from application code.
 
+##### <a name="glossary-embedded-resources"></a>Embedded Resources Stored in `byte[]`
+The total size of all `byte[]` objects used for storing resources (e.g., files accessed via `Class.getResource()`) within the native image. The number of resources is shown in the [Image Heap](#glossary-image-heap) section.
+
 ##### <a name="glossary-code-metadata"></a>Code Metadata Stored in `byte[]`
 The total size of all `byte[]` objects used for metadata for the [code area](#glossary-code-area).
 Therefore, reducing the number of [reachable methods](#glossary-reachability) also reduces the size of this metadata.

substratevm/src/com.oracle.svm.hosted/src/com/oracle/svm/hosted/ProgressReporter.java

@@ -68,6 +68,8 @@
 import com.oracle.svm.core.annotate.AutomaticFeature;
 import com.oracle.svm.core.code.CodeInfoTable;
 import com.oracle.svm.core.heap.Heap;
+import com.oracle.svm.core.jdk.Resources;
+import com.oracle.svm.core.jdk.resources.ResourceStorageEntry;
 import com.oracle.svm.core.option.HostedOptionValues;
 import com.oracle.svm.core.reflect.ReflectionMetadataDecoder;
 import com.oracle.svm.core.util.VMError;
@@ -389,8 +391,9 @@ public void printCreationEnd(int imageSize, int numHeapObjects, long imageHeapSi
         String format = "%9s (%5.2f%%) for ";
         l().a(format, Utils.bytesToHuman(codeCacheSize), codeCacheSize / (double) imageSize * 100)
                         .doclink("code area", "#glossary-code-area").a(":%,9d compilation units", numCompilations).println();
+        int numResources = Resources.singleton().resources().size();
         l().a(format, Utils.bytesToHuman(imageHeapSize), imageHeapSize / (double) imageSize * 100)
-                        .doclink("image heap", "#glossary-image-heap").a(": %,8d objects", numHeapObjects).println();
+                        .doclink("image heap", "#glossary-image-heap").a(":%,8d objects and %,d resources", numHeapObjects, numResources).println();
         if (debugInfoSize > 0) {
             DirectPrinter l = l().a(format, Utils.bytesToHuman(debugInfoSize), debugInfoSize / (double) imageSize * 100)
                             .doclink("debug info", "#glossary-debug-info");
@@ -502,6 +505,16 @@ private Map<String, Long> calculateHeapBreakdown(Collection<ObjectInfo> heapObje
                 classNameToSize.put(BREAKDOWN_BYTE_ARRAY_PREFIX + linkStrategy.asDocLink("reflection metadata", "#glossary-reflection-metadata"), metadataByteLength);
                 remainingBytes -= metadataByteLength;
             }
+            long resourcesByteLength = 0;
+            for (ResourceStorageEntry resourceList : Resources.singleton().resources().getValues()) {
+                for (byte[] resource : resourceList.getData()) {
+                    resourcesByteLength += resource.length;
+                }
+            }
+            if (resourcesByteLength > 0) {
+                classNameToSize.put(BREAKDOWN_BYTE_ARRAY_PREFIX + linkStrategy.asDocLink("embedded resources", "#glossary-embedded-resources"), resourcesByteLength);
+                remainingBytes -= resourcesByteLength;
+            }
             if (graphEncodingByteLength > 0) {
                 classNameToSize.put(BREAKDOWN_BYTE_ARRAY_PREFIX + linkStrategy.asDocLink("graph encodings", "#glossary-graph-encodings"), graphEncodingByteLength);
                 remainingBytes -= graphEncodingByteLength;