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comparison src/os_cpu/linux_zero/vm/thread_linux_zero.hpp @ 1010:354d3184f6b2

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6890308: integrate zero assembler hotspot changes Reviewed-by: never Contributed-by: gbenson@redhat.com
author never
date Tue, 13 Oct 2009 12:04:21 -0700
parents
children f9271ff9d324
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1009:03b336640699 1010:354d3184f6b2
1 /*
2 * Copyright 2000-2007 Sun Microsystems, Inc. All Rights Reserved.
3 * Copyright 2007, 2008, 2009 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
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
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
22 * have any questions.
23 *
24 */
25
26 private:
27 ZeroStack _zero_stack;
28 ZeroFrame* _top_zero_frame;
29
30 void pd_initialize() {
31 _top_zero_frame = NULL;
32 }
33
34 public:
35 ZeroStack *zero_stack() {
36 return &_zero_stack;
37 }
38
39 public:
40 ZeroFrame *top_zero_frame() {
41 return _top_zero_frame;
42 }
43 void push_zero_frame(ZeroFrame *frame) {
44 *(ZeroFrame **) frame = _top_zero_frame;
45 _top_zero_frame = frame;
46 }
47 void pop_zero_frame() {
48 zero_stack()->set_sp((intptr_t *) _top_zero_frame + 1);
49 _top_zero_frame = *(ZeroFrame **) _top_zero_frame;
50 }
51
52 public:
53 static ByteSize zero_stack_offset() {
54 return byte_offset_of(JavaThread, _zero_stack);
55 }
56 static ByteSize top_zero_frame_offset() {
57 return byte_offset_of(JavaThread, _top_zero_frame);
58 }
59
60 public:
61 void record_base_of_stack_pointer() {
62 assert(top_zero_frame() == NULL, "junk on stack prior to Java call");
63 }
64 void set_base_of_stack_pointer(intptr_t* base_sp) {
65 assert(base_sp == NULL, "should be");
66 assert(top_zero_frame() == NULL, "junk on stack after Java call");
67 }
68
69 public:
70 void set_last_Java_frame() {
71 JavaFrameAnchor *jfa = frame_anchor();
72 jfa->set_last_Java_sp((intptr_t *) top_zero_frame());
73 }
74 void reset_last_Java_frame() {
75 JavaFrameAnchor *jfa = frame_anchor();
76 jfa->set_last_Java_sp(NULL);
77 }
78
79 private:
80 frame pd_last_frame() {
81 assert(has_last_Java_frame(), "must have last_Java_sp() when suspended");
82 return frame(last_Java_sp(), zero_stack()->sp());
83 }
84
85 public:
86 // Check for pending suspend requests and pending asynchronous
87 // exceptions. There are separate accessors for these, but
88 // _suspend_flags is volatile so using them would be unsafe.
89 bool has_special_condition_for_native_trans() {
90 return _suspend_flags != 0;
91 }
92
93 public:
94 bool pd_get_top_frame_for_signal_handler(frame* fr_addr,
95 void* ucontext,
96 bool isInJava) {
97 ShouldNotCallThis();
98 }
99
100 // These routines are only used on cpu architectures that
101 // have separate register stacks (Itanium).
102 static bool register_stack_overflow() { return false; }
103 static void enable_register_stack_guard() {}
104 static void disable_register_stack_guard() {}