[GR-37889] Reduce memory pressure for objectFile.write.

PullRequest: graal/11651

Author: olpaw

substratevm/src/com.oracle.objectfile/src/com/oracle/objectfile/io/AssemblyBuffer.java

@@ -58,15 +58,15 @@ public static InputDisassembler createInputDisassembler(ByteBuffer in) {
         return new AssemblyBuffer(in);
     }
 
-    public static OutputAssembler createOutputAssembler(ByteBuffer out) {
+    public static AssemblyBuffer createOutputAssembler(ByteBuffer out) {
         return new AssemblyBuffer(out);
     }
 
-    public static OutputAssembler createOutputAssembler(ByteOrder order) {
+    public static AssemblyBuffer createOutputAssembler(ByteOrder order) {
         return new AssemblyBuffer(order);
     }
 
-    public static OutputAssembler createOutputAssembler() {
+    public static AssemblyBuffer createOutputAssembler() {
         return new AssemblyBuffer();
     }
 
@@ -280,23 +280,24 @@ private void ensure(int n) {
             }
 
             // grow and replace
-            ByteBuffer nbuf = ByteBuffer.allocate(newCap);
-            nbuf.order(ByteOrder.nativeOrder());
-            byte[] old = new byte[pos];
-            buf.rewind();
-            buf.get(old);
-            nbuf.put(old);
-            buf = nbuf;
+            buf = ByteBuffer.wrap(Arrays.copyOf(buf.array(), newCap));
+            buf.order(ByteOrder.nativeOrder());
+            buf.position(pos);
         }
     }
 
     @Override
     public byte[] getBlob() {
-        int len = buf.position();
-        byte[] bytes = new byte[len];
-        buf.position(0);
-        buf.get(bytes);
-        return bytes;
+        return getBlob(false);
+    }
+
+    public byte[] getBlob(boolean consume) {
+        byte[] array = buf.array();
+        int position = buf.position();
+        if (consume) {
+            buf = null;
+        }
+        return Arrays.copyOf(array, position);
     }
 
     @Override

substratevm/src/com.oracle.svm.core.graal.llvm/src/com/oracle/svm/core/graal/llvm/LLVMNativeImageCodeCache.java

@@ -457,7 +457,7 @@ public Path[] getCCInputFiles(Path tempDirectory, String imageName) {
     }
 
     @Override
-    public List<ObjectFile.Symbol> getSymbols(ObjectFile objectFile, boolean onlyGlobal) {
+    public List<ObjectFile.Symbol> getSymbols(ObjectFile objectFile) {
         return globalSymbols;
     }
 

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

@@ -679,6 +679,13 @@ private void doRun(Map<Method, CEntryPointData> entryPoints,
                 }
             }
 
+            ProgressReporter.CenteredTextPrinter breakdownsPrinter = SubstrateOptions.BuildOutputBreakdowns.getValue()
+                            ? ProgressReporter.singleton().createBreakdowns(compileQueue.getCompilationTasks(), image.getHeap().getObjects())
+                            : null;
+            compileQueue.purge();
+
+            int numCompilations = codeCache.getCompilations().size();
+
             try (StopTimer t = TimerCollection.createTimerAndStart(TimerCollection.Registry.WRITE)) {
                 bb.getHeartbeatCallback().run();
                 BeforeImageWriteAccessImpl beforeConfig = new BeforeImageWriteAccessImpl(featureHandler, loader, imageName, image,
@@ -701,9 +708,9 @@ private void doRun(Map<Method, CEntryPointData> entryPoints,
                 featureHandler.forEachFeature(feature -> feature.afterImageWrite(afterConfig));
             }
             reporter.printCreationEnd(image.getImageSize(), bb.getUniverse(), heap.getObjectCount(), image.getImageHeapSize(), codeCache.getCodeCacheSize(),
-                            codeCache.getCompilations().size(), image.getDebugInfoSize());
-            if (SubstrateOptions.BuildOutputBreakdowns.getValue()) {
-                ProgressReporter.singleton().printBreakdowns(compileQueue.getCompilationTasks(), image.getHeap().getObjects());
+                            numCompilations, image.getDebugInfoSize());
+            if (breakdownsPrinter != null) {
+                breakdownsPrinter.reset().flushln();
             }
         }
     }

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

@@ -412,7 +412,7 @@ public void ensureCreationStageEndCompleted() {
         }
     }
 
-    public void printBreakdowns(Collection<CompileTask> compilationTasks, Collection<ObjectInfo> heapObjects) {
+    public CenteredTextPrinter createBreakdowns(Collection<CompileTask> compilationTasks, Collection<ObjectInfo> heapObjects) {
         Map<String, Long> codeBreakdown = calculateCodeBreakdown(compilationTasks);
         Map<String, Long> heapBreakdown = calculateHeapBreakdown(heapObjects);
         l().printLineSeparator();
@@ -458,9 +458,8 @@ public void printBreakdowns(Collection<CompileTask> compilationTasks, Collection
                         .jumpToMiddle()
                         .a("      ... ").a(numHeapBreakdownItems - printedCodeSizeEntries.size()).a(" additional object types").flushln();
 
-        new CenteredTextPrinter().dim()
-                        .a("(use ").link("GraalVM Dashboard", "https://www.graalvm.org/dashboard/?ojr=help%3Btopic%3Dgetting-started.md").a(" to see all)")
-                        .reset().flushln();
+        return new CenteredTextPrinter().dim()
+                        .a("(use ").link("GraalVM Dashboard", "https://www.graalvm.org/dashboard/?ojr=help%3Btopic%3Dgetting-started.md").a(" to see all)");
     }
 
     private static Map<String, Long> calculateCodeBreakdown(Collection<CompileTask> compilationTasks) {

substratevm/src/com.oracle.svm.hosted/src/com/oracle/svm/hosted/code/CompileQueue.java

@@ -479,6 +479,10 @@ public Map<HostedMethod, CompileTask> getCompilations() {
         return compilations;
     }
 
+    public void purge() {
+        compilations.clear();
+    }
+
     public Collection<CompileTask> getCompilationTasks() {
         return compilations.values();
     }