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comparison src/os_cpu/windows_x86/vm/thread_windows_x86.cpp @ 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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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2003-2005 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_windows_x86.cpp.incl"
27
28 // For Forte Analyzer AsyncGetCallTrace profiling support - thread is
29 // currently interrupted by SIGPROF
30 bool JavaThread::pd_get_top_frame_for_signal_handler(frame* fr_addr,
31 void* ucontext, bool isInJava) {
32
33 assert(Thread::current() == this, "caller must be current thread");
34 assert(this->is_Java_thread(), "must be JavaThread");
35
36 JavaThread* jt = (JavaThread *)this;
37
38 // If we have a last_Java_frame, then we should use it even if
39 // isInJava == true. It should be more reliable than CONTEXT info.
40 if (jt->has_last_Java_frame()) {
41 *fr_addr = jt->pd_last_frame();
42 return true;
43 }
44
45 // At this point, we don't have a last_Java_frame, so
46 // we try to glean some information out of the CONTEXT
47 // if we were running Java code when SIGPROF came in.
48 if (isInJava) {
49 CONTEXT* uc = (CONTEXT*)ucontext;
50
51 #ifdef AMD64
52 intptr_t* ret_fp = (intptr_t*) uc->Rbp;
53 intptr_t* ret_sp = (intptr_t*) uc->Rsp;
54 ExtendedPC addr = ExtendedPC((address)uc->Rip);
55 #else
56 intptr_t* ret_fp = (intptr_t*) uc->Ebp;
57 intptr_t* ret_sp = (intptr_t*) uc->Esp;
58 ExtendedPC addr = ExtendedPC((address)uc->Eip);
59 #endif // AMD64
60 if (addr.pc() == NULL || ret_sp == NULL ) {
61 // CONTEXT wasn't useful
62 return false;
63 }
64
65 frame ret_frame(ret_sp, ret_fp, addr.pc());
66 if (!ret_frame.safe_for_sender(jt)) {
67 #ifdef COMPILER2
68 // C2 uses ebp as a general register see if NULL fp helps
69 frame ret_frame2(ret_sp, NULL, addr.pc());
70 if (!ret_frame2.safe_for_sender(jt)) {
71 // nothing else to try if the frame isn't good
72 return false;
73 }
74 ret_frame = ret_frame2;
75 #else
76 // nothing else to try if the frame isn't good
77 return false;
78 #endif /* COMPILER2 */
79 }
80 *fr_addr = ret_frame;
81 return true;
82 }
83
84 // nothing else to try
85 return false;
86 }