Tue, 15 Sep 2009 21:53:47 -0700
6863023: need non-perm oops in code cache for JSR 292
Summary: Make a special root-list for those few nmethods which might contain non-perm oops.
Reviewed-by: twisti, kvn, never, jmasa, ysr
1 /*
2 * Copyright 1997-2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
25 # include "incls/_precompiled.incl"
26 # include "incls/_pcDesc.cpp.incl"
28 PcDesc::PcDesc(int pc_offset, int scope_decode_offset, int obj_decode_offset) {
29 assert(sizeof(PcDescFlags) <= 4, "occupies more than a word");
30 _pc_offset = pc_offset;
31 _scope_decode_offset = scope_decode_offset;
32 _obj_decode_offset = obj_decode_offset;
33 _flags.word = 0;
34 }
36 address PcDesc::real_pc(const nmethod* code) const {
37 return code->instructions_begin() + pc_offset();
38 }
40 void PcDesc::print(nmethod* code) {
41 #ifndef PRODUCT
42 ResourceMark rm;
43 tty->print_cr("PcDesc(pc=0x%lx offset=%x):", real_pc(code), pc_offset());
45 if (scope_decode_offset() == DebugInformationRecorder::serialized_null) {
46 return;
47 }
49 for (ScopeDesc* sd = code->scope_desc_at(real_pc(code));
50 sd != NULL;
51 sd = sd->sender()) {
52 tty->print(" ");
53 sd->method()->print_short_name(tty);
54 tty->print(" @%d", sd->bci());
55 tty->print(" reexecute=%s", sd->should_reexecute()?"true":"false");
56 tty->cr();
57 }
58 #endif
59 }
61 bool PcDesc::verify(nmethod* code) {
62 //Unimplemented();
63 return true;
64 }