On Mon, 13 Oct 2025 08:31:05 GMT, Yasumasa Suenaga <[email protected]> wrote:
>> test/hotspot/jtreg/serviceability/sa/TestJhsdbJstackMixedWithVirtualThread.java >> line 39: >> >>> 37: * @test >>> 38: * @bug 8369505 >>> 39: * @requires (os.family == "linux") & (vm.hasSA) >> >> I think it would be good to run this on macosx also, but it can't be run >> --mixed. I did reproduce the exception on macosx without --mixed. It doesn't >> however produce the "<StubRoutines (continuation stubs)>" frame. The test >> would need to be modified to instead check for the exception. >> >> Probably we should run this on Windows also. > > I updated testcase to run this on other platforms - runs `jhsdb jstack` > without `--mixed` and checks stderr. > > I tested on Windows, but I didn't see any errors - I guess `jhsdb jstack` > couldn't unwind stacks on Windows, thus it did not reach continuation stub. > But it is different problem. On Windows I am seeing the exception (with your fix disabled): "ForkJoinPool-1-worker-1" #30 daemon prio=5 tid=0x000001567d6bcdc0 nid=2588 runnable [0x00000002d35fe000] java.lang.Thread.State: RUNNABLE JavaThread state: _thread_in_native - java.lang.invoke.LambdaForm$MH+0x0000000026047800.invoke(java.lang.Object, long, int) @bci=10 (Interpreted frame) - java.lang.invoke.LambdaForm$MH+0x000000002604e400.invokeExact_MT(java.lang.Object, long, int, java.lang.Object) @bci=21 (Interpreted frame) - jdk.internal.foreign.abi.DowncallStub+0x0000000026048800.invoke(java.lang.foreign.SegmentAllocator, java.lang.foreign.MemorySegment, int) @bci=44 (Interpreted frame) - java.lang.invoke.LambdaForm$DMH+0x0000000026048c00.invokeStaticInit(java.lang.Object, java.lang.Object, java.lang.Object, int) @bci=14 (Interpreted frame) - java.lang.invoke.LambdaForm$MH+0x000000002604d800.invoke(java.lang.Object, int) @bci=44 (Interpreted frame) - java.lang.invoke.LambdaForm$MH+0x000000002604d400.invoke_MT(java.lang.Object, int, java.lang.Object) @bci=18 (Interpreted frame) - LingeredAppWithVirtualThread.run() @bci=15, line=65 (Interpreted frame) Error occurred during stack walking: sun.jvm.hotspot.utilities.AssertionFailure: must have non-zero frame size With your fix enabled, I see the full expected stack, so it seems to be working. ------------- PR Review Comment: https://git.openjdk.org/jdk/pull/27728#discussion_r2427225103
