On Tue, 12 Nov 2024 12:18:03 GMT, Per Minborg <pminb...@openjdk.org> wrote:
> I want to add such a test case, but I am worried that it will consume too
> many resources during the build process.
>
> ```java
> /**
> * @test
> * @bug 8343984
> * @summary Test that the append capacity is close to Integer.MaxValue
> * @run main/othervm -Xms6g -Xmx6g HugeAppend
> */
>
> public final class HugeAppend {
> public static void main(String[] args) {
> StringBuilder buf = new StringBuilder();
> int loop4 = Integer.MAX_VALUE / 4;
> for (int i = 0; i < loop4; i++) {
> buf.append(true);
> }
>
> buf.setLength(0);
> int loop5 = Integer.MAX_VALUE / 5;
> for (int i = 0; i < loop5; i++) {
> buf.append(false);
> }
> }
> }
> ```
In the master branch, this test will succeed in jtreg
* jtreg
make test TEST="jtreg:test/jdk/java/util/BitSet/HugeToString.java"
* result
==============================
Test summary
==============================
TEST TOTAL PASS FAIL ERROR
jtreg:test/jdk/java/util/BitSet/HugeToString.java 1 1 0 0
==============================
TEST SUCCESS
But running it directly will cause JVM Crash
~/git/jdk_x/build/macosx-aarch64-server-release/images/jdk/bin/java -Xms6g
-Xmx6g HugeAppend
-------------
PR Comment: https://git.openjdk.org/jdk/pull/22027#issuecomment-2470661592
