1 /*
2 * Copyright (c) 2008, 2016, 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
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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef OS_CPU_LINUX_ARM_VM_THREAD_LINUX_ARM_HPP
26 #define OS_CPU_LINUX_ARM_VM_THREAD_LINUX_ARM_HPP
27
28 private:
29 // The following thread-local variables replicate corresponding global variables.
30 // They are used for a quick access from compiled code via Rthread register.
31 address _heap_top_addr;
32 address _heap_lock_addr;
33 address _card_table_base;
34
35 void pd_initialize() {
36 _anchor.clear();
37 _in_top_frame_unsafe_section = NULL;
38 }
39
40 frame pd_last_frame() {
41 assert(has_last_Java_frame(), "must have last_Java_sp() when suspended");
42 #ifdef AARCH64
43 assert (_anchor.last_Java_pc() != NULL, "pc should be stored");
44 return frame(_anchor.last_Java_sp(), _anchor.last_Java_fp(), _anchor.last_Java_pc());
45 #else
46 if (_anchor.last_Java_pc() != NULL) {
47 return frame(_anchor.last_Java_sp(), _anchor.last_Java_fp(), _anchor.last_Java_pc());
48 } else {
49 // This will pick up pc from sp
50 return frame(_anchor.last_Java_sp(), _anchor.last_Java_fp());
51 }
52 #endif // AARCH64
53 }
54
55 public:
56 intptr_t* last_Java_fp() { return _anchor.last_Java_fp(); }
57 void set_last_Java_fp(intptr_t* fp) { _anchor.set_last_Java_fp(fp); }
58 void set_last_Java_pc(address pc) { _anchor.set_last_Java_pc(pc); }
59
60 static ByteSize last_Java_fp_offset() {
61 return byte_offset_of(JavaThread, _anchor) + JavaFrameAnchor::last_Java_fp_offset();
62 }
63
64 void set_base_of_stack_pointer(intptr_t* base_sp) {
65 // Nothing to do
66 }
67
68 intptr_t* base_of_stack_pointer() {
69 return NULL;
70 }
71
72 void record_base_of_stack_pointer() {
73 // Nothing to do
74 }
75
76 static ByteSize heap_top_addr_offset() { return byte_offset_of(JavaThread, _heap_top_addr); }
77 static ByteSize card_table_base_offset() { return byte_offset_of(JavaThread, _card_table_base); }
78
79 private:
80 // Set to "this" if pd_get_top_frame should ignore this thread for now.
81 JavaThread *_in_top_frame_unsafe_section;
82
83 public:
84 static ByteSize in_top_frame_unsafe_section_offset() { return byte_offset_of(JavaThread, _in_top_frame_unsafe_section); }
85 bool in_top_frame_unsafe_section() { return _in_top_frame_unsafe_section == this; }
86
87 bool pd_get_top_frame_for_signal_handler(frame* fr_addr, void* ucontext, bool isInJava);
88
89 bool pd_get_top_frame_for_profiling(frame* fr_addr, void* ucontext, bool isInJava);
90 private:
91 bool pd_get_top_frame(frame* fr_addr, void* ucontext, bool isInJava);
92 public:
93
94 // These routines are only used on cpu architectures that
95 // have separate register stacks (Itanium).
96 static bool register_stack_overflow() { return false; }
97 static void enable_register_stack_guard() {}
98 static void disable_register_stack_guard() {}
99
100 #endif // OS_CPU_LINUX_ARM_VM_THREAD_LINUX_ARM_HPP