8350811: [JMH] test foreign.StrLenTest failed with StringIndexOutOfBoundsException for size=451

Reviewed-by: jbhateja, vpaprotski, mcimadamore

Author: Vladimir Ivanov

test/micro/org/openjdk/bench/java/lang/foreign/StrLenTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2021, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -54,10 +54,10 @@ public class StrLenTest extends CLayouts {
     Arena arena = Arena.ofConfined();
 
     SegmentAllocator segmentAllocator;
-    SegmentAllocator arenaAllocator = new RingAllocator(arena);
-    SlicingPool pool = new SlicingPool();
+    SegmentAllocator arenaAllocator;
+    SlicingPool pool;
 
-    @Param({"5", "20", "100"})
+    @Param({"5", "20", "100", "451"})
     public int size;
     public String str;
 
@@ -76,6 +76,8 @@ public class StrLenTest extends CLayouts {
     @Setup
     public void setup() {
         str = makeString(size);
+        arenaAllocator = new RingAllocator(arena, size + 1);
+        pool = new SlicingPool(size + 1);
         segmentAllocator = SegmentAllocator.prefixAllocator(arena.allocate(size + 1, 1));
     }
 
@@ -142,6 +144,9 @@ static String makeString(int size) {
                  fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt
                  mollit anim id est laborum.
                 """;
+        while (lorem.length() < size) {
+            lorem += lorem;
+        }
         return lorem.substring(0, size);
     }
 
@@ -150,8 +155,8 @@ static class RingAllocator implements SegmentAllocator {
         SegmentAllocator current;
         long rem;
 
-        public RingAllocator(Arena session) {
-            this.segment = session.allocate(1024, 1);
+        public RingAllocator(Arena session, int size) {
+            this.segment = session.allocate(size, 1);
             reset();
         }
 
@@ -173,9 +178,13 @@ void reset() {
     }
 
     static class SlicingPool {
-        final MemorySegment pool = Arena.ofAuto().allocate(1024);
+        final MemorySegment pool;
         boolean isAcquired = false;
 
+        public SlicingPool(int size) {
+            this.pool = Arena.ofAuto().allocate(size);
+        }
+
         public Arena acquire() {
             if (isAcquired) {
                 throw new IllegalStateException("An allocator is already in use");

test/micro/org/openjdk/bench/java/lang/foreign/ToCStringTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2023, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -54,7 +54,7 @@
 @Fork(value = 3, jvmArgs = { "--enable-native-access=ALL-UNNAMED", "-Djava.library.path=micro/native" })
 public class ToCStringTest extends CLayouts {
 
-    @Param({"5", "20", "100", "200"})
+    @Param({"5", "20", "100", "200", "451"})
     public int size;
     public String str;
 
@@ -97,6 +97,9 @@ static String makeString(int size) {
                  fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt
                  mollit anim id est laborum.
                 """;
+        while (lorem.length() < size) {
+            lorem += lorem;
+        }
         return lorem.substring(0, size);
     }
 }

test/micro/org/openjdk/bench/java/lang/foreign/ToJavaStringTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2023, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -48,7 +48,7 @@ public class ToJavaStringTest {
 
     private MemorySegment strSegment;
 
-    @Param({"5", "20", "100", "200"})
+    @Param({"5", "20", "100", "200", "451"})
     int size;
 
     static {
@@ -58,6 +58,9 @@ public class ToJavaStringTest {
     @Setup
     public void setup() {
         var arena = Arena.ofAuto();
+        while (LOREM.length() < size) {
+            LOREM += LOREM;
+        }
         strSegment = arena.allocateFrom(LOREM.substring(0, size));
     }