Mercurial > hg > truffle
annotate src/share/vm/runtime/unhandledOops.cpp @ 5459:ecb598b9d535
add simple test for ControlFlowGraph block computation
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Thu, 31 May 2012 18:24:53 +0200 |
parents | f95d63e2154a |
children | d2a62e0f25eb |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
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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. | |
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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). | |
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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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "gc_interface/collectedHeap.hpp" | |
27 #include "memory/gcLocker.inline.hpp" | |
28 #include "memory/universe.hpp" | |
29 #include "oops/oop.inline.hpp" | |
30 #include "runtime/thread.hpp" | |
31 #include "runtime/unhandledOops.hpp" | |
32 #include "utilities/globalDefinitions.hpp" | |
0 | 33 |
34 #ifdef CHECK_UNHANDLED_OOPS | |
35 const int free_list_size = 256; | |
36 | |
37 | |
38 UnhandledOops::UnhandledOops(Thread* thread) { | |
39 _thread = thread; | |
40 _oop_list = new (ResourceObj::C_HEAP) | |
41 GrowableArray<UnhandledOopEntry>(free_list_size, true); | |
42 _level = 0; | |
43 } | |
44 | |
45 UnhandledOops::~UnhandledOops() { | |
46 delete _oop_list; | |
47 } | |
48 | |
49 | |
50 void UnhandledOops::dump_oops(UnhandledOops *list) { | |
51 for (int k = 0; k < list->_oop_list->length(); k++) { | |
52 UnhandledOopEntry entry = list->_oop_list->at(k); | |
53 tty->print(" " INTPTR_FORMAT, entry._oop_ptr); | |
54 } | |
55 tty->cr(); | |
56 } | |
57 | |
58 // For debugging unhandled oop detector _in the debugger_ | |
59 // You don't want to turn it on in compiled code here. | |
60 static bool unhandled_oop_print=0; | |
61 | |
62 void UnhandledOops::register_unhandled_oop(oop* op, address pc) { | |
63 if (!_thread->is_in_stack((address)op)) | |
64 return; | |
65 | |
66 _level ++; | |
67 if (unhandled_oop_print) { | |
68 for (int i=0; i<_level; i++) tty->print(" "); | |
69 tty->print_cr("r " INTPTR_FORMAT, op); | |
70 } | |
71 UnhandledOopEntry entry(op, pc); | |
72 _oop_list->push(entry); | |
73 } | |
74 | |
75 | |
76 bool match_oop_entry(void *op, UnhandledOopEntry e) { | |
77 return (e.oop_ptr() == op); | |
78 } | |
79 | |
80 // Mark unhandled oop as okay for GC - the containing struct has an oops_do and | |
81 // for some reason the oop has to be on the stack. | |
82 // May not be called for the current thread, as in the case of | |
83 // VM_GetOrSetLocal in jvmti. | |
84 void UnhandledOops::allow_unhandled_oop(oop* op) { | |
85 assert (CheckUnhandledOops, "should only be called with checking option"); | |
86 | |
87 int i = _oop_list->find_at_end(op, match_oop_entry); | |
88 assert(i!=-1, "safe for gc oop not in unhandled_oop_list"); | |
89 | |
90 UnhandledOopEntry entry = _oop_list->at(i); | |
91 assert(!entry._ok_for_gc, "duplicate entry"); | |
92 entry._ok_for_gc = true; | |
93 _oop_list->at_put(i, entry); | |
94 } | |
95 | |
96 | |
97 // Called by the oop destructor to remove unhandled oop from the thread's | |
98 // oop list. All oops given are assumed to be on the list. If not, | |
99 // there's a bug in the unhandled oop detector. | |
100 void UnhandledOops::unregister_unhandled_oop(oop* op) { | |
101 if (!_thread->is_in_stack((address)op)) return; | |
102 | |
103 _level --; | |
104 if (unhandled_oop_print) { | |
105 for (int i=0; i<_level; i++) tty->print(" "); | |
106 tty->print_cr("u "INTPTR_FORMAT, op); | |
107 } | |
108 | |
109 int i = _oop_list->find_at_end(op, match_oop_entry); | |
110 assert(i!=-1, "oop not in unhandled_oop_list"); | |
111 _oop_list->remove_at(i); | |
112 } | |
113 | |
114 void UnhandledOops::clear_unhandled_oops() { | |
115 assert (CheckUnhandledOops, "should only be called with checking option"); | |
116 if (_thread->is_gc_locked_out()) { | |
117 return; | |
118 } | |
119 for (int k = 0; k < _oop_list->length(); k++) { | |
120 UnhandledOopEntry entry = _oop_list->at(k); | |
121 // If an entry is on the unhandled oop list but isn't on the stack | |
122 // anymore, it must not have gotten unregistered properly and it's a bug | |
123 // in the unhandled oop generator. | |
124 if(!_thread->is_in_stack((address)entry._oop_ptr)) { | |
125 tty->print_cr("oop_ptr is " INTPTR_FORMAT, (address)entry._oop_ptr); | |
126 tty->print_cr("thread is " INTPTR_FORMAT " from pc " INTPTR_FORMAT, | |
127 (address)_thread, (address)entry._pc); | |
128 assert(false, "heap is corrupted by the unhandled oop detector"); | |
129 } | |
130 // Set unhandled oops to a pattern that will crash distinctively | |
131 if (!entry._ok_for_gc) *(intptr_t*)(entry._oop_ptr) = BAD_OOP_ADDR; | |
132 } | |
133 } | |
134 #endif // CHECK_UNHANDLED_OOPS |