1 /* 2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_PRIMS_JVMTIMANAGECAPABILITIES_HPP 26 #define SHARE_VM_PRIMS_JVMTIMANAGECAPABILITIES_HPP 27 28 #include "jvmtifiles/jvmti.h" 29 #include "memory/allocation.hpp" 30 31 class JvmtiManageCapabilities : public AllStatic { 32 33 private: 34 35 // these four capabilities sets represent all potentially 36 // available capabilities. They are disjoint, covering 37 // the four cases: (OnLoad vs OnLoad+live phase) X 38 // (one environment vs any environment). 39 static jvmtiCapabilities always_capabilities; 40 static jvmtiCapabilities onload_capabilities; 41 static jvmtiCapabilities always_solo_capabilities; 42 static jvmtiCapabilities onload_solo_capabilities; 43 44 // solo capabilities that have not been grabbed 45 static jvmtiCapabilities always_solo_remaining_capabilities; 46 static jvmtiCapabilities onload_solo_remaining_capabilities; 47 48 // all capabilities ever acquired 49 static jvmtiCapabilities acquired_capabilities; 50 51 // basic intenal operations 52 static jvmtiCapabilities *either(const jvmtiCapabilities *a, const jvmtiCapabilities *b, jvmtiCapabilities *result); 53 static jvmtiCapabilities *both(const jvmtiCapabilities *a, const jvmtiCapabilities *b, jvmtiCapabilities *result); 54 static jvmtiCapabilities *exclude(const jvmtiCapabilities *a, const jvmtiCapabilities *b, jvmtiCapabilities *result); 55 static bool has_some(const jvmtiCapabilities *a); 56 static void update(); 57 58 // init functions 59 static jvmtiCapabilities init_always_capabilities(); 60 static jvmtiCapabilities init_onload_capabilities(); 61 static jvmtiCapabilities init_always_solo_capabilities(); 62 static jvmtiCapabilities init_onload_solo_capabilities(); 63 64 public: 65 static void initialize(); 66 67 // may have to adjust always capabilities when VM initialization has completed 68 static void recompute_always_capabilities(); 69 70 // queries and actions 71 static void get_potential_capabilities(const jvmtiCapabilities *current, 72 const jvmtiCapabilities *prohibited, 73 jvmtiCapabilities *result); 74 static jvmtiError add_capabilities(const jvmtiCapabilities *current, 75 const jvmtiCapabilities *prohibited, 76 const jvmtiCapabilities *desired, 77 jvmtiCapabilities *result); 78 static void relinquish_capabilities(const jvmtiCapabilities *current, 79 const jvmtiCapabilities *unwanted, 80 jvmtiCapabilities *result); 81 static void copy_capabilities(const jvmtiCapabilities *from, jvmtiCapabilities *to); 82 83 #ifndef PRODUCT 84 static void print(const jvmtiCapabilities* caps); 85 #endif 86 }; 87 88 #endif // SHARE_VM_PRIMS_JVMTIMANAGECAPABILITIES_HPP