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8061205: MetadataOnStackMark only needs to walk code cache during class redefinition

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Only do full metadata walk during class redefinition and only walk handles during class unloading.

Reviewed-by: sspitsyn, stefank
This commit is contained in:
Coleen Phillimore 2015-03-13 12:40:39 -04:00
parent 984cf4c9b5
commit 7b384c6958
19 changed files with 147 additions and 248 deletions
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16
hotspot/src/share/vm/utilities/accessFlags.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1997, 2015, 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
@ -47,20 +47,6 @@ void AccessFlags::atomic_clear_bits(jint bits) {
} while(f != old_flags);
}
// Returns true iff this thread succeeded setting the bit.
bool AccessFlags::atomic_set_one_bit(jint bit) {
// Atomically update the flags with the bit given
jint old_flags, new_flags, f;
bool is_setting_bit = false;
do {
old_flags = _flags;
new_flags = old_flags | bit;
is_setting_bit = old_flags != new_flags;
f = Atomic::cmpxchg(new_flags, &_flags, old_flags);
} while(f != old_flags);
return is_setting_bit;
}
#if !defined(PRODUCT) || INCLUDE_JVMTI