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6994753: Implement optional hook to a Java method at VM startup

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Reviewed-by: mchung, acorn
This commit is contained in:
Kevin Walls 2011-01-12 15:44:16 +00:00
parent 0b5708a12d
commit b6d2068ee2
7 changed files with 43 additions and 14 deletions
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13
hotspot/src/share/vm/runtime/java.hpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1997, 2011, 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
@ -92,6 +92,7 @@ class JDK_Version VALUE_OBJ_CLASS_SPEC {
bool _partially_initialized;
bool _thread_park_blocker;
bool _post_vm_init_hook_enabled;
bool is_valid() const {
return (_major != 0 || _partially_initialized);
@ -113,14 +114,15 @@ class JDK_Version VALUE_OBJ_CLASS_SPEC {
JDK_Version() : _major(0), _minor(0), _micro(0), _update(0),
_special(0), _build(0), _partially_initialized(false),
_thread_park_blocker(false) {}
_thread_park_blocker(false), _post_vm_init_hook_enabled(false) {}
JDK_Version(uint8_t major, uint8_t minor = 0, uint8_t micro = 0,
uint8_t update = 0, uint8_t special = 0, uint8_t build = 0,
bool thread_park_blocker = false) :
bool thread_park_blocker = false, bool post_vm_init_hook_enabled = false) :
_major(major), _minor(minor), _micro(micro), _update(update),
_special(special), _build(build), _partially_initialized(false),
_thread_park_blocker(thread_park_blocker) {}
_thread_park_blocker(thread_park_blocker),
_post_vm_init_hook_enabled(post_vm_init_hook_enabled) {}
// Returns the current running JDK version
static JDK_Version current() { return _current; }
@ -144,6 +146,9 @@ class JDK_Version VALUE_OBJ_CLASS_SPEC {
bool supports_thread_park_blocker() const {
return _thread_park_blocker;
}
bool post_vm_init_hook_enabled() const {
return _post_vm_init_hook_enabled;
}
// Performs a full ordering comparison using all fields (update, build, etc.)
int compare(const JDK_Version& other) const;