Mercurial > hg > truffle
comparison src/os_cpu/solaris_sparc/vm/thread_solaris_sparc.cpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | 93b6525e3b82 |
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-1:000000000000 | 0:a61af66fc99e |
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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 } |