Mercurial > hg > graal-compiler

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

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Initial load
author duke
date Sat, 01 Dec 2007 00:00:00 +0000
parents
children 93b6525e3b82
comparison
equal deleted inserted replaced
-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2003-2004 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
25 #include "incls/_precompiled.incl"
26 #include "incls/_thread_solaris_sparc.cpp.incl"
27
28 // For Forte Analyzer AsyncGetCallTrace profiling support - thread is
29 // currently interrupted by SIGPROF
30 //
31 // NOTE: On Solaris, register windows are flushed in the signal handler
32 // except for possibly the top frame.
33 //
34 bool JavaThread::pd_get_top_frame_for_signal_handler(frame* fr_addr,
35 void* ucontext, bool isInJava) {
36
37 assert(Thread::current() == this, "caller must be current thread");
38 assert(this->is_Java_thread(), "must be JavaThread");
39
40 JavaThread* jt = (JavaThread *)this;
41
42 if (!isInJava) {
43 // make_walkable flushes register windows and grabs last_Java_pc
44 // which can not be done if the ucontext sp matches last_Java_sp
45 // stack walking utilities assume last_Java_pc set if marked flushed
46 jt->frame_anchor()->make_walkable(jt);
47 }
48
49 // If we have a walkable last_Java_frame, then we should use it
50 // even if isInJava == true. It should be more reliable than
51 // ucontext info.
52 if (jt->has_last_Java_frame() && jt->frame_anchor()->walkable()) {
53 #if 0
54 // This sanity check may not be needed with the new frame
55 // walking code. Remove it for now.
56 if (!jt->frame_anchor()->post_Java_state_is_pc()
57 && frame::next_younger_sp_or_null(last_Java_sp(),
58 jt->frame_anchor()->post_Java_sp()) == NULL) {
59 // the anchor contains an SP, but the frame is not walkable
60 // because post_Java_sp isn't valid relative to last_Java_sp
61 return false;
62 }
63 #endif
64 *fr_addr = jt->pd_last_frame();
65 return true;
66 }
67
68 ucontext_t* uc = (ucontext_t*) ucontext;
69
70 // At this point, we don't have a walkable last_Java_frame, so
71 // we try to glean some information out of the ucontext.
72 intptr_t* ret_sp;
73 ExtendedPC addr = os::Solaris::fetch_frame_from_ucontext(this, uc,
74 &ret_sp, NULL /* ret_fp only used on Solaris X86 */);
75 if (addr.pc() == NULL || ret_sp == NULL) {
76 // ucontext wasn't useful
77 return false;
78 }
79
80 // we were running Java code when SIGPROF came in
81 if (isInJava) {
82 // If we have a last_Java_sp, then the SIGPROF signal caught us
83 // right when we were transitioning from _thread_in_Java to a new
84 // JavaThreadState. We use last_Java_sp instead of the sp from
85 // the ucontext since it should be more reliable.
86 if (jt->has_last_Java_frame()) {
87 ret_sp = jt->last_Java_sp();
88 }
89 // Implied else: we don't have a last_Java_sp so we use what we
90 // got from the ucontext.
91
92 frame ret_frame(ret_sp, frame::unpatchable, addr.pc());
93 if (!ret_frame.safe_for_sender(jt)) {
94 // nothing else to try if the frame isn't good
95 return false;
96 }
97 *fr_addr = ret_frame;
98 return true;
99 }
100
101 // At this point, we know we weren't running Java code. We might
102 // have a last_Java_sp, but we don't have a walkable frame.
103 // However, we might still be able to construct something useful
104 // if the thread was running native code.
105 if (jt->has_last_Java_frame()) {
106 assert(!jt->frame_anchor()->walkable(), "case covered above");
107
108 if (jt->thread_state() == _thread_in_native) {
109 frame ret_frame(jt->last_Java_sp(), frame::unpatchable, addr.pc());
110 if (!ret_frame.safe_for_sender(jt)) {
111 // nothing else to try if the frame isn't good
112 return false;
113 }
114 *fr_addr = ret_frame;
115 return true;
116 }
117 }
118
119 // nothing else to try
120 return false;
121 }