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8293613: need to properly handle and hide tmp VTMS transitions

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Reviewed-by: cjplummer, lmesnik
This commit is contained in:
Serguei Spitsyn 2022-09-28 04:44:43 +00:00
parent 5e1e449c11
commit 79ccc791f2
10 changed files with 145 additions and 68 deletions
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20
src/hotspot/share/prims/jvm.cpp
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@ -3882,6 +3882,8 @@ JVM_ENTRY(void, JVM_VirtualThreadMountBegin(JNIEnv* env, jobject vthread, jboole
assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
return;
}
assert(!thread->is_in_tmp_VTMS_transition(), "sanity check");
assert(!thread->is_in_VTMS_transition(), "sanity check");
JvmtiVTMSTransitionDisabler::start_VTMS_transition(vthread, /* is_mount */ true);
#else
fatal("Should only be called with JVMTI enabled");
@ -3906,6 +3908,7 @@ JVM_ENTRY(void, JVM_VirtualThreadMountEnd(JNIEnv* env, jobject vthread, jboolean
}
}
assert(thread->is_in_VTMS_transition(), "sanity check");
assert(!thread->is_in_tmp_VTMS_transition(), "sanity check");
JvmtiVTMSTransitionDisabler::finish_VTMS_transition(vthread, /* is_mount */ true);
if (first_mount) {
// thread start
@ -3954,7 +3957,7 @@ JVM_ENTRY(void, JVM_VirtualThreadUnmountBegin(JNIEnv* env, jobject vthread, jboo
}
}
}
assert(!thread->is_in_tmp_VTMS_transition(), "sanity check");
assert(!thread->is_in_VTMS_transition(), "sanity check");
JvmtiVTMSTransitionDisabler::start_VTMS_transition(vthread, /* is_mount */ false);
@ -3977,12 +3980,27 @@ JVM_ENTRY(void, JVM_VirtualThreadUnmountEnd(JNIEnv* env, jobject vthread, jboole
return;
}
assert(thread->is_in_VTMS_transition(), "sanity check");
assert(!thread->is_in_tmp_VTMS_transition(), "sanity check");
JvmtiVTMSTransitionDisabler::finish_VTMS_transition(vthread, /* is_mount */ false);
#else
fatal("Should only be called with JVMTI enabled");
#endif
JVM_END
JVM_ENTRY(void, JVM_VirtualThreadHideFrames(JNIEnv* env, jobject vthread, jboolean hide))
#if INCLUDE_JVMTI
if (!DoJVMTIVirtualThreadTransitions) {
assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
return;
}
assert(!thread->is_in_VTMS_transition(), "sanity check");
assert(thread->is_in_tmp_VTMS_transition() != (bool)hide, "sanity check");
thread->toggle_is_in_tmp_VTMS_transition();
#else
fatal("Should only be called with JVMTI enabled");
#endif
JVM_END
/*
* Return the current class's class file version. The low order 16 bits of the
* returned jint contain the class's major version. The high order 16 bits