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6965184: possible races in make_not_entrant_or_zombie

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Reviewed-by: kvn
This commit is contained in:
Tom Rodriguez 2010-07-08 14:29:44 -07:00
parent ae3ddc1514
commit 7533d0caf7
22 changed files with 226 additions and 740 deletions
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10
hotspot/src/share/vm/runtime/sweeper.hpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 1997, 2005, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1997, 2010, 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
@ -31,12 +31,13 @@ class NMethodSweeper : public AllStatic {
static long _traversals; // Stack traversal count
static nmethod* _current; // Current nmethod
static int _seen; // Nof. nmethod we have currently processed in current pass of CodeCache
static int _invocations; // No. of invocations left until we are completed with this pass
static volatile int _invocations; // No. of invocations left until we are completed with this pass
static volatile int _sweep_started; // Flag to control conc sweeper
static bool _rescan; // Indicates that we should do a full rescan of the
// of the code cache looking for work to do.
static bool _do_sweep; // Flag to skip the conc sweep if no stack scan happened
static jint _sweep_started; // Flag to control conc sweeper
static int _locked_seen; // Number of locked nmethods encountered during the scan
static int _not_entrant_seen_on_stack; // Number of not entrant nmethod were are still on stack
@ -47,6 +48,9 @@ class NMethodSweeper : public AllStatic {
static long _was_full_traversal; // trav number at last emergency unloading
static void process_nmethod(nmethod *nm);
static void log_sweep(const char* msg, const char* format = NULL, ...);
public:
static long traversal_count() { return _traversals; }