I was not able to reproduce this issue in thousands of mach5 runs on multiple
platforms. However, the root cause seems to be pretty simple. A
JvmtiVTMSTransitionDisabler needs to be added to make the JVM TI StopThread
function to be VTMS (Virtual Thread Mount state) transition safe.
So the fix is a one-liner:
diff --git a/src/hotspot/share/prims/jvmtiEnv.cpp
b/src/hotspot/share/prims/jvmtiEnv.cpp
index a9efe01c92e..f5e9176230a 100644
--- a/src/hotspot/share/prims/jvmtiEnv.cpp
+++ b/src/hotspot/share/prims/jvmtiEnv.cpp
@@ -1182,6 +1182,8 @@ JvmtiEnv::ResumeAllVirtualThreads(jint except_count,
const jthread* except_list)
jvmtiError
JvmtiEnv::StopThread(jthread thread, jobject exception) {
JavaThread* current_thread = JavaThread::current();
+
+ JvmtiVTMSTransitionDisabler disabler;
ThreadsListHandle tlh(current_thread);
JavaThread* java_thread = NULL;
oop thread_oop = NULL;
-------------
Commit messages:
- 8293339: vm/jvmti/StopThread/stop001/stop00103 crashes with SIGSEGV in
Continuation::is_continuation_mounted
Changes: https://git.openjdk.org/jdk/pull/10235/files
Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10235&range=00
Issue: https://bugs.openjdk.org/browse/JDK-8293339
Stats: 2 lines in 1 file changed: 2 ins; 0 del; 0 mod
Patch: https://git.openjdk.org/jdk/pull/10235.diff
Fetch: git fetch https://git.openjdk.org/jdk pull/10235/head:pull/10235
PR: https://git.openjdk.org/jdk/pull/10235
