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annotate src/os_cpu/linux_sparc/vm/thread_linux_sparc.hpp @ 1562:dfe27f03244a
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date | Tue, 01 Jun 2010 11:48:33 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
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133 | 1 /* |
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2 * Copyright (c) 1998, 2008, Oracle and/or its affiliates. All rights reserved. |
133 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
133 | 22 * |
23 */ | |
24 | |
25 private: | |
26 | |
27 void pd_initialize() { | |
28 _anchor.clear(); | |
29 _base_of_stack_pointer = NULL; | |
30 } | |
31 | |
32 frame pd_last_frame() { | |
33 assert(has_last_Java_frame(), "must have last_Java_sp() when suspended"); | |
34 assert(_anchor.walkable(), "thread has not dumped its register windows yet"); | |
35 | |
36 assert(_anchor.last_Java_pc() != NULL, "Ack no pc!"); | |
37 return frame(last_Java_sp(), frame::unpatchable, _anchor.last_Java_pc()); | |
38 } | |
39 | |
40 // Sometimes the trap handler needs to record both PC and NPC. | |
41 // This is a SPARC-specific companion to Thread::set_saved_exception_pc. | |
42 address _saved_exception_npc; | |
43 | |
44 // In polling_page_safepoint_handler_blob(s) we have to tail call other | |
45 // blobs without blowing any registers. A tail call requires some | |
46 // register to jump with and we can't blow any registers, so it must | |
47 // be restored in the delay slot. 'restore' cannot be used as it | |
48 // will chop the heads off of 64-bit %o registers in the 32-bit | |
49 // build. Instead we reload the registers using G2_thread and this | |
50 // location. Must be 64bits in the 32-bit LION build. | |
51 jdouble _o_reg_temps[6]; | |
52 | |
53 // a stack pointer older than any java frame stack pointer. It is | |
54 // used to validate stack pointers in frame::next_younger_sp (it | |
55 // provides the upper bound in the range check). This is necessary | |
56 // on Solaris/SPARC since the ucontext passed to a signal handler is | |
57 // sometimes corrupt and we need a way to check the extracted sp. | |
58 intptr_t* _base_of_stack_pointer; | |
59 | |
60 public: | |
61 | |
62 static int o_reg_temps_offset_in_bytes() { return offset_of(JavaThread, _o_reg_temps); } | |
63 | |
64 #ifndef _LP64 | |
65 address o_reg_temps(int i) { return (address)&_o_reg_temps[i]; } | |
66 #endif | |
67 | |
68 static int saved_exception_npc_offset_in_bytes() { return offset_of(JavaThread,_saved_exception_npc); } | |
69 | |
70 address saved_exception_npc() { return _saved_exception_npc; } | |
71 void set_saved_exception_npc(address a) { _saved_exception_npc = a; } | |
72 | |
73 | |
74 public: | |
75 | |
76 intptr_t* base_of_stack_pointer() { return _base_of_stack_pointer; } | |
77 | |
78 void set_base_of_stack_pointer(intptr_t* base_sp) { | |
79 _base_of_stack_pointer = base_sp; | |
80 } | |
81 | |
82 void record_base_of_stack_pointer() { | |
83 intptr_t *sp = (intptr_t *)(((intptr_t)StubRoutines::Sparc::flush_callers_register_windows_func()())); | |
84 intptr_t *ysp; | |
85 while((ysp = (intptr_t*)sp[FP->sp_offset_in_saved_window()]) != NULL) { | |
86 sp = (intptr_t *)((intptr_t)ysp + STACK_BIAS); | |
87 } | |
88 _base_of_stack_pointer = sp; | |
89 } | |
90 | |
91 bool pd_get_top_frame_for_signal_handler(frame* fr_addr, void* ucontext, | |
92 bool isInJava); | |
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() {} |