[GR-61620] Capacity of UnsafeWasmMemory.asByteBuffer not equal to length of memory.

jirkamarsik · jirkamarsik · commit b035c61c0c1d · 2025-01-26T08:00:07.000Z
PullRequest: graal/19908
diff --git a/wasm/src/org.graalvm.wasm/src/org/graalvm/wasm/memory/UnsafeWasmMemory.java b/wasm/src/org.graalvm.wasm/src/org/graalvm/wasm/memory/UnsafeWasmMemory.java
@@ -1011,7 +1011,7 @@ public void close() {
     @ExportMessage
     @TruffleBoundary
     public ByteBuffer asByteBuffer() {
-        return buffer.duplicate();
+        return buffer.slice(0, Math.toIntExact(byteSize()));
     }
 
     private boolean outOfBounds(int offset, int length) {

Original file line number	Diff line number	Diff line change
`@@ -1011,7 +1011,7 @@ public void close() {`
`1011`	`1011`	`@ExportMessage`
`1012`	`1012`	`@TruffleBoundary`
`1013`	`1013`	`public ByteBuffer asByteBuffer() {`
`1014`		`- return buffer.duplicate();`
	`1014`	`+ return buffer.slice(0, Math.toIntExact(byteSize()));`
`1015`	`1015`	`}`
`1016`	`1016`
`1017`	`1017`	`private boolean outOfBounds(int offset, int length) {`