Wed, 14 Mar 2012 20:06:48 -0700
7123170: JCK vm/jvmti/ResourceExhausted/resexh001/resexh00101/ tests fails since 7u4 b02
Summary: The JVMTI ResourceExhausted events must be generated in all places where OOME is thrown
Reviewed-by: acorn, coleenp, dcubed, dholmes, dsamersoff, jwilhelm, tonyp
Contributed-by: serguei.spitsyn@oracle.com
1 /*
2 * Copyright (c) 2000, 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
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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.
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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23 */
25 #ifndef SHARE_VM_PRIMS_METHODCOMPARATOR_HPP
26 #define SHARE_VM_PRIMS_METHODCOMPARATOR_HPP
28 #include "interpreter/bytecodeStream.hpp"
29 #include "oops/constantPoolOop.hpp"
30 #include "oops/methodOop.hpp"
32 class BciMap;
34 // methodComparator provides an interface for determining if methods of
35 // different versions of classes are equivalent or switchable
37 class MethodComparator {
38 private:
39 static BytecodeStream *_s_old, *_s_new;
40 static constantPoolOop _old_cp, _new_cp;
41 static BciMap *_bci_map;
42 static bool _switchable_test;
43 static GrowableArray<int> *_fwd_jmps;
45 static bool args_same(Bytecodes::Code c_old, Bytecodes::Code c_new);
46 static bool pool_constants_same(int cpi_old, int cpi_new);
47 static int check_stack_and_locals_size(methodOop old_method, methodOop new_method);
49 public:
50 // Check if the new method is equivalent to the old one modulo constant pool (EMCP).
51 // Intuitive definition: two versions of the same method are EMCP, if they don't differ
52 // on the source code level. Practically, we check whether the only difference between
53 // method versions is some constantpool indices embedded into the bytecodes, and whether
54 // these indices eventually point to the same constants for both method versions.
55 static bool methods_EMCP(methodOop old_method, methodOop new_method);
57 static bool methods_switchable(methodOop old_method, methodOop new_method, BciMap &bci_map);
58 };
61 // ByteCode Index Map. For two versions of the same method, where the new version may contain
62 // fragments not found in the old version, provides a mapping from an index of a bytecode in
63 // the old method to the index of the same bytecode in the new method.
65 class BciMap {
66 private:
67 int *_old_bci, *_new_st_bci, *_new_end_bci;
68 int _cur_size, _cur_pos;
69 int _pos;
71 public:
72 BciMap() {
73 _cur_size = 50;
74 _old_bci = (int*) malloc(sizeof(int) * _cur_size);
75 _new_st_bci = (int*) malloc(sizeof(int) * _cur_size);
76 _new_end_bci = (int*) malloc(sizeof(int) * _cur_size);
77 _cur_pos = 0;
78 }
80 ~BciMap() {
81 free(_old_bci);
82 free(_new_st_bci);
83 free(_new_end_bci);
84 }
86 // Store the position of an added fragment, e.g.
87 //
88 // |<- old_bci
89 // -----------------------------------------
90 // Old method |invokevirtual 5|aload 1|...
91 // -----------------------------------------
92 //
93 // |<- new_st_bci |<- new_end_bci
94 // --------------------------------------------------------------------
95 // New method |invokevirual 5|aload 2|invokevirtual 6|aload 1|...
96 // --------------------------------------------------------------------
97 // ^^^^^^^^^^^^^^^^^^^^^^^^
98 // Added fragment
100 void store_fragment_location(int old_bci, int new_st_bci, int new_end_bci) {
101 if (_cur_pos == _cur_size) {
102 _cur_size += 10;
103 _old_bci = (int*) realloc(_old_bci, sizeof(int) * _cur_size);
104 _new_st_bci = (int*) realloc(_new_st_bci, sizeof(int) * _cur_size);
105 _new_end_bci = (int*) realloc(_new_end_bci, sizeof(int) * _cur_size);
106 }
107 _old_bci[_cur_pos] = old_bci;
108 _new_st_bci[_cur_pos] = new_st_bci;
109 _new_end_bci[_cur_pos] = new_end_bci;
110 _cur_pos++;
111 }
113 int new_bci_for_old(int old_bci) {
114 if (_cur_pos == 0 || old_bci < _old_bci[0]) return old_bci;
115 _pos = 1;
116 while (_pos < _cur_pos && old_bci >= _old_bci[_pos])
117 _pos++;
118 return _new_end_bci[_pos-1] + (old_bci - _old_bci[_pos-1]);
119 }
121 // Test if two indexes - one in the old method and another in the new one - correspond
122 // to the same bytecode
123 bool old_and_new_locations_same(int old_dest_bci, int new_dest_bci) {
124 if (new_bci_for_old(old_dest_bci) == new_dest_bci)
125 return true;
126 else if (_old_bci[_pos-1] == old_dest_bci)
127 return (new_dest_bci == _new_st_bci[_pos-1]);
128 else return false;
129 }
130 };
132 #endif // SHARE_VM_PRIMS_METHODCOMPARATOR_HPP