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
79private:
80  // Set to "this" if pd_get_top_frame should ignore this thread for now.
81  JavaThread *_in_top_frame_unsafe_section;
82
83public:
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);
90private:
91  bool pd_get_top_frame(frame* fr_addr, void* ucontext, bool isInJava);
92public:
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
101