Tue, 08 Apr 2008 12:23:15 -0400
6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
Summary: Rewrite frame::safe_for_sender and friends to be safe for collector/analyzer
Reviewed-by: dcubed, kvn
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.
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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.
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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
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23 */
25 #include "incls/_precompiled.incl"
26 #include "incls/_thread_solaris_x86.cpp.incl"
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) {
33 assert(Thread::current() == this, "caller must be current thread");
34 assert(this->is_Java_thread(), "must be JavaThread");
35 JavaThread* jt = (JavaThread *)this;
37 // last_Java_frame is always walkable and safe use it if we have it
39 if (jt->has_last_Java_frame()) {
40 *fr_addr = jt->pd_last_frame();
41 return true;
42 }
44 ucontext_t* uc = (ucontext_t*) ucontext;
46 // We always want to use the initial frame we create from the ucontext as
47 // it certainly signals where we currently are. However that frame may not
48 // be safe for calling sender. In that case if we have a last_Java_frame
49 // then the forte walker will switch to that frame as the virtual sender
50 // for the frame we create here which is not sender safe.
52 intptr_t* ret_fp;
53 intptr_t* ret_sp;
54 ExtendedPC addr = os::Solaris::fetch_frame_from_ucontext(this, uc, &ret_sp, &ret_fp);
56 // Something would really have to be screwed up to get a NULL pc
58 if (addr.pc() == NULL ) {
59 assert(false, "NULL pc from signal handler!");
60 return false;
62 }
64 // If sp and fp are nonsense just leave them out
66 if ((address)ret_sp >= jt->stack_base() ||
67 (address)ret_sp < jt->stack_base() - jt->stack_size() ) {
69 ret_sp = NULL;
70 ret_fp = NULL;
71 } else {
73 // sp is reasonable is fp reasonable?
74 if ( (address)ret_fp >= jt->stack_base() || ret_fp < ret_sp) {
75 ret_fp = NULL;
76 }
77 }
79 frame ret_frame(ret_sp, ret_fp, addr.pc());
81 *fr_addr = ret_frame;
82 return true;
84 }