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comparison src/os_cpu/solaris_sparc/vm/thread_solaris_sparc.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children c18cbe5936b8
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1 /*
2 * Copyright 1998-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24 private:
25
26 void pd_initialize() {
27 _anchor.clear();
28 _base_of_stack_pointer = NULL;
29 }
30
31 frame pd_last_frame() {
32 assert(has_last_Java_frame(), "must have last_Java_sp() when suspended");
33 assert(_anchor.walkable(), "thread has not dumped its register windows yet");
34
35 assert(_anchor.last_Java_pc() != NULL, "Ack no pc!");
36 return frame(last_Java_sp(), frame::unpatchable, _anchor.last_Java_pc());
37 }
38
39 // Sometimes the trap handler needs to record both PC and NPC.
40 // This is a SPARC-specific companion to Thread::set_saved_exception_pc.
41 address _saved_exception_npc;
42
43 // In polling_page_safepoint_handler_blob(s) we have to tail call other
44 // blobs without blowing any registers. A tail call requires some
45 // register to jump with and we can't blow any registers, so it must
46 // be restored in the delay slot. 'restore' cannot be used as it
47 // will chop the heads off of 64-bit %o registers in the 32-bit
48 // build. Instead we reload the registers using G2_thread and this
49 // location. Must be 64bits in the 32-bit LION build.
50 jdouble _o_reg_temps[6];
51
52 // a stack pointer older than any java frame stack pointer. It is
53 // used to validate stack pointers in frame::next_younger_sp (it
54 // provides the upper bound in the range check). This is necessary
55 // on Solaris/SPARC since the ucontext passed to a signal handler is
56 // sometimes corrupt and we need a way to check the extracted sp.
57 intptr_t* _base_of_stack_pointer;
58
59 public:
60
61 static int o_reg_temps_offset_in_bytes() { return offset_of(JavaThread, _o_reg_temps); }
62
63 #ifndef _LP64
64 address o_reg_temps(int i) { return (address)&_o_reg_temps[i]; }
65 #endif
66
67 static int saved_exception_npc_offset_in_bytes() { return offset_of(JavaThread,_saved_exception_npc); }
68
69 address saved_exception_npc() { return _saved_exception_npc; }
70 void set_saved_exception_npc(address a) { _saved_exception_npc = a; }
71
72
73 public:
74
75 intptr_t* base_of_stack_pointer() { return _base_of_stack_pointer; }
76
77 void set_base_of_stack_pointer(intptr_t* base_sp) {
78 _base_of_stack_pointer = base_sp;
79 }
80
81 void record_base_of_stack_pointer() {
82 intptr_t *sp = (intptr_t *)(((intptr_t)StubRoutines::Sparc::flush_callers_register_windows_func()()));
83 intptr_t *ysp;
84 while((ysp = (intptr_t*)sp[FP->sp_offset_in_saved_window()]) != NULL) {
85 sp = (intptr_t *)((intptr_t)ysp + STACK_BIAS);
86 }
87 _base_of_stack_pointer = sp;
88 }
89
90 bool pd_get_top_frame_for_signal_handler(frame* fr_addr, void* ucontext,
91 bool isInJava);
92
93 // These routines are only used on cpu architectures that
94 // have separate register stacks (Itanium).
95 static bool register_stack_overflow() { return false; }
96 static void enable_register_stack_guard() {}
97 static void disable_register_stack_guard() {}