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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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14
hotspot/src/share/vm/opto/parse2.cpp
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@ -1,5 +1,5 @@
/*
* Copyright 1998-2009 Sun Microsystems, Inc. All Rights Reserved.
* Copyright 1998-2010 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
@ -2079,13 +2079,6 @@ void Parse::do_one_bytecode() {
// null exception oop throws NULL pointer exception
do_null_check(peek(), T_OBJECT);
if (stopped()) return;
if (env()->jvmti_can_post_exceptions()) {
// "Full-speed throwing" is not necessary here,
// since we're notifying the VM on every throw.
uncommon_trap(Deoptimization::Reason_unhandled,
Deoptimization::Action_none);
return;
}
// Hook the thrown exception directly to subsequent handlers.
if (BailoutToInterpreterForThrows) {
// Keep method interpreted from now on.
@ -2093,6 +2086,11 @@ void Parse::do_one_bytecode() {
Deoptimization::Action_make_not_compilable);
return;
}
if (env()->jvmti_can_post_on_exceptions()) {
// check if we must post exception events, take uncommon trap if so (with must_throw = false)
uncommon_trap_if_should_post_on_exceptions(Deoptimization::Reason_unhandled, false);
}
// Here if either can_post_on_exceptions or should_post_on_exceptions is false
add_exception_state(make_exception_state(peek()));
break;