thread_linux_aarch64.hpp revision 9651:f7dc8eebc3f5 
1/*
2 * Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2014, Red Hat Inc. All rights reserved.
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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
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24 */
25
26#ifndef OS_CPU_LINUX_AARCH64_VM_THREAD_LINUX_AARCH64_HPP
27#define OS_CPU_LINUX_AARCH64_VM_THREAD_LINUX_AARCH64_HPP
28
29 private:
30#ifdef ASSERT
31  // spill stack holds N callee-save registers at each Java call and
32  // grows downwards towards limit
33  // we need limit to check we have space for a spill and base so we
34  // can identify all live spill frames at GC (eventually)
35  address          _spill_stack;
36  address          _spill_stack_base;
37  address          _spill_stack_limit;
38#endif // ASSERT
39
40  void pd_initialize() {
41    _anchor.clear();
42  }
43
44  frame pd_last_frame() {
45    assert(has_last_Java_frame(), "must have last_Java_sp() when suspended");
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  }
53
54 public:
55  // Mutators are highly dangerous....
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
59  void set_base_of_stack_pointer(intptr_t* base_sp) {
60  }
61
62  static ByteSize last_Java_fp_offset()          {
63    return byte_offset_of(JavaThread, _anchor) + JavaFrameAnchor::last_Java_fp_offset();
64  }
65
66  intptr_t* base_of_stack_pointer() {
67    return NULL;
68  }
69  void record_base_of_stack_pointer() {
70  }
71
72  bool pd_get_top_frame_for_signal_handler(frame* fr_addr, void* ucontext,
73    bool isInJava);
74
75  bool pd_get_top_frame_for_profiling(frame* fr_addr, void* ucontext, bool isInJava);
76private:
77  bool pd_get_top_frame(frame* fr_addr, void* ucontext, bool isInJava);
78public:
79
80  static Thread *aarch64_get_thread_helper();
81
82  // These routines are only used on cpu architectures that
83  // have separate register stacks (Itanium).
84  static bool register_stack_overflow() { return false; }
85  static void enable_register_stack_guard() {}
86  static void disable_register_stack_guard() {}
87
88#endif // OS_CPU_LINUX_AARCH64_VM_THREAD_LINUX_AARCH64_HPP
89