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6902182: 4/4 Starting with jdwp agent should not incur performance penalty

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Rename can_post_exceptions support to can_post_on_exceptions. Add support for should_post_on_exceptions flag to permit per JavaThread optimizations.

Reviewed-by: never, kvn, dcubed
This commit is contained in:
Tom Deneau 2010-02-01 17:35:05 -07:00 • committed by Daniel D. Daugherty
parent 679f958f72
commit f23b68b367
19 changed files with 111 additions and 52 deletions
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10
hotspot/src/share/vm/c1/c1_Runtime1.cpp
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@ -1,5 +1,5 @@
/*
* Copyright 1999-2009 Sun Microsystems, Inc. All Rights Reserved.
* Copyright 1999-2010 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -110,8 +110,8 @@ static void deopt_caller() {
RegisterMap reg_map(thread, false);
frame runtime_frame = thread->last_frame();
frame caller_frame = runtime_frame.sender(&reg_map);
VM_DeoptimizeFrame deopt(thread, caller_frame.id());
VMThread::execute(&deopt);
// bypass VM_DeoptimizeFrame and deoptimize the frame directly
Deoptimization::deoptimize_frame(thread, caller_frame.id());
assert(caller_is_deopted(), "Must be deoptimized");
}
}
@ -354,7 +354,7 @@ JRT_END
JRT_ENTRY(void, Runtime1::post_jvmti_exception_throw(JavaThread* thread))
if (JvmtiExport::can_post_exceptions()) {
if (JvmtiExport::can_post_on_exceptions()) {
vframeStream vfst(thread, true);
address bcp = vfst.method()->bcp_from(vfst.bci());
JvmtiExport::post_exception_throw(thread, vfst.method(), bcp, thread->exception_oop());
@ -437,7 +437,7 @@ JRT_ENTRY_NO_ASYNC(static address, exception_handler_for_pc_helper(JavaThread* t
bool guard_pages_enabled = thread->stack_yellow_zone_enabled();
if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack();
if (JvmtiExport::can_post_exceptions()) {
if (JvmtiExport::can_post_on_exceptions()) {
// To ensure correct notification of exception catches and throws
// we have to deoptimize here. If we attempted to notify the
// catches and throws during this exception lookup it's possible