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8055008: Clean up code that saves the previous versions of redefined classes

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Use scratch_class to find EMCP methods for breakpoints if the old methods are still running.

Reviewed-by: dcubed, sspitsyn
This commit is contained in:
Coleen Phillimore 2014-09-03 19:13:18 -04:00
parent 07001d0332
commit 3c70d99eda
13 changed files with 340 additions and 369 deletions
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6
hotspot/src/share/vm/classfile/metadataOnStackMark.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2013, 2014, Oracle and/or its affiliates. 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
@ -41,7 +41,7 @@ NOT_PRODUCT(bool MetadataOnStackMark::_is_active = false;)
// Walk metadata on the stack and mark it so that redefinition doesn't delete
// it. Class unloading also walks the previous versions and might try to
// delete it, so this class is used by class unloading also.
MetadataOnStackMark::MetadataOnStackMark() {
MetadataOnStackMark::MetadataOnStackMark(bool has_redefined_a_class) {
assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
NOT_PRODUCT(_is_active = true;)
if (_marked_objects == NULL) {
@ -49,7 +49,7 @@ MetadataOnStackMark::MetadataOnStackMark() {
}
Threads::metadata_do(Metadata::mark_on_stack);
if (JvmtiExport::has_redefined_a_class()) {
if (has_redefined_a_class) {
CodeCache::alive_nmethods_do(nmethod::mark_on_stack);
}
CompileBroker::mark_on_stack();