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8227745: Enable Escape Analysis for Better Performance in the Presence of JVMTI Agents

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8233915: JVMTI FollowReferences: Java Heap Leak not found because of C2 Scalar Replacement

Reviewed-by: mdoerr, goetz, sspitsyn, kvn
This commit is contained in:
Richard Reingruber 2020-10-20 15:31:55 +00:00
parent f167a71f1d
commit 40f847e2fb
53 changed files with 5744 additions and 218 deletions
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17
src/hotspot/share/prims/jvmtiEnvBase.cpp
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@ -1306,10 +1306,17 @@ VM_GetAllStackTraces::doit() {
// HandleMark must be defined in the caller only.
// It is to keep a ret_ob_h handle alive after return to the caller.
jvmtiError
JvmtiEnvBase::check_top_frame(Thread* current_thread, JavaThread* java_thread,
JvmtiEnvBase::check_top_frame(JavaThread* current_thread, JavaThread* java_thread,
jvalue value, TosState tos, Handle* ret_ob_h) {
ResourceMark rm(current_thread);
if (java_thread->frames_to_pop_failed_realloc() > 0) {
// VM is in the process of popping the top frame because it has scalar replaced objects
// which could not be reallocated on the heap.
// Return JVMTI_ERROR_OUT_OF_MEMORY to avoid interfering with the VM.
return JVMTI_ERROR_OUT_OF_MEMORY;
}
vframe *vf = vframeForNoProcess(java_thread, 0);
NULL_CHECK(vf, JVMTI_ERROR_NO_MORE_FRAMES);
@ -1324,6 +1331,12 @@ JvmtiEnvBase::check_top_frame(Thread* current_thread, JavaThread* java_thread,
return JVMTI_ERROR_OPAQUE_FRAME;
}
Deoptimization::deoptimize_frame(java_thread, jvf->fr().id());
// Eagerly reallocate scalar replaced objects.
EscapeBarrier eb(true, current_thread, java_thread);
if (!eb.deoptimize_objects(jvf->fr().id())) {
// Reallocation of scalar replaced objects failed -> return with error
return JVMTI_ERROR_OUT_OF_MEMORY;
}
}
// Get information about method return type
@ -1369,7 +1382,7 @@ JvmtiEnvBase::check_top_frame(Thread* current_thread, JavaThread* java_thread,
jvmtiError
JvmtiEnvBase::force_early_return(JavaThread* java_thread, jvalue value, TosState tos) {
Thread* current_thread = Thread::current();
JavaThread* current_thread = JavaThread::current();
HandleMark hm(current_thread);
uint32_t debug_bits = 0;