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comparison src/cpu/zero/vm/javaFrameAnchor_zero.hpp @ 1505:0c5b3cf3c1f5

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6939182: Zero JNI handles fix Summary: Zero will exit with an error when invoked with -Xcheck:jni. Reviewed-by: twisti, kamg Contributed-by: Gary Benson <gbenson@redhat.com>
author twisti
date Fri, 30 Apr 2010 04:27:25 -0700
parents 354d3184f6b2
children 6cfbdb113e52
comparison
equal deleted inserted replaced
1504:ae8f909e5fc7 1505:0c5b3cf3c1f5
1 /* 1 /*
2 * Copyright 2003-2005 Sun Microsystems, Inc. All Rights Reserved. 2 * Copyright 2003-2005 Sun Microsystems, Inc. All Rights Reserved.
3 * Copyright 2007, 2008 Red Hat, Inc. 3 * Copyright 2007, 2008, 2010 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 * 5 *
6 * This code is free software; you can redistribute it and/or modify it 6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as 7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation. 8 * published by the Free Software Foundation.
21 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * CA 95054 USA or visit www.sun.com if you need additional information or
22 * have any questions. 22 * have any questions.
23 * 23 *
24 */ 24 */
25 25
26 private:
27 ZeroFrame* volatile _last_Java_fp;
28
26 public: 29 public:
27 // Each arch must define reset, save, restore 30 // Each arch must define reset, save, restore
28 // These are used by objects that only care about: 31 // These are used by objects that only care about:
29 // 1 - initializing a new state (thread creation, javaCalls) 32 // 1 - initializing a new state (thread creation, javaCalls)
30 // 2 - saving a current state (javaCalls) 33 // 2 - saving a current state (javaCalls)
31 // 3 - restoring an old state (javaCalls) 34 // 3 - restoring an old state (javaCalls)
35 // Note that whenever _last_Java_sp != NULL other anchor fields
36 // must be valid. The profiler apparently depends on this.
32 37
33 void clear() { 38 void clear() {
34 // clearing _last_Java_sp must be first 39 // clearing _last_Java_sp must be first
35 _last_Java_sp = NULL; 40 _last_Java_sp = NULL;
36 // fence? 41 // fence?
42 _last_Java_fp = NULL;
37 _last_Java_pc = NULL; 43 _last_Java_pc = NULL;
38 } 44 }
39 45
40 void copy(JavaFrameAnchor* src) { 46 void copy(JavaFrameAnchor* src) {
47 set(src->_last_Java_sp, src->_last_Java_pc, src->_last_Java_fp);
48 }
49
50 void set(intptr_t* sp, address pc, ZeroFrame* fp) {
41 // In order to make sure the transition state is valid for "this" 51 // In order to make sure the transition state is valid for "this"
42 // We must clear _last_Java_sp before copying the rest of the new 52 // We must clear _last_Java_sp before copying the rest of the new
43 // data 53 // data
44 // 54 //
45 // Hack Alert: Temporary bugfix for 4717480/4721647 To act like 55 // Hack Alert: Temporary bugfix for 4717480/4721647 To act like
46 // previous version (pd_cache_state) don't NULL _last_Java_sp 56 // previous version (pd_cache_state) don't NULL _last_Java_sp
47 // unless the value is changing 57 // unless the value is changing
48 // 58 //
49 if (_last_Java_sp != src->_last_Java_sp) 59 if (_last_Java_sp != sp)
50 _last_Java_sp = NULL; 60 _last_Java_sp = NULL;
51 61
52 _last_Java_pc = src->_last_Java_pc; 62 _last_Java_fp = fp;
63 _last_Java_pc = pc;
53 // Must be last so profiler will always see valid frame if 64 // Must be last so profiler will always see valid frame if
54 // has_last_frame() is true 65 // has_last_frame() is true
55 _last_Java_sp = src->_last_Java_sp; 66 _last_Java_sp = sp;
56 } 67 }
57 68
58 bool walkable() { 69 bool walkable() {
59 return true; 70 return true;
60 } 71 }
65 76
66 intptr_t* last_Java_sp() const { 77 intptr_t* last_Java_sp() const {
67 return _last_Java_sp; 78 return _last_Java_sp;
68 } 79 }
69 80
70 void set_last_Java_sp(intptr_t* sp) { 81 ZeroFrame* last_Java_fp() const {
71 _last_Java_sp = sp; 82 return _last_Java_fp;
72 } 83 }