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comparison src/os_cpu/bsd_x86/vm/thread_bsd_x86.cpp @ 3960:f08d439fab8c

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7089790: integrate bsd-port changes Reviewed-by: kvn, twisti, jrose Contributed-by: Kurt Miller <kurt@intricatesoftware.com>, Greg Lewis <glewis@eyesbeyond.com>, Jung-uk Kim <jkim@freebsd.org>, Christos Zoulas <christos@zoulas.com>, Landon Fuller <landonf@plausible.coop>, The FreeBSD Foundation <board@freebsdfoundation.org>, Michael Franz <mvfranz@gmail.com>, Roger Hoover <rhoover@apple.com>, Alexander Strange <astrange@apple.com>
author never
date Sun, 25 Sep 2011 16:03:29 -0700
parents
children f34d701e952e
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3959:eda6988c0d81 3960:f08d439fab8c
1 /*
2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "runtime/frame.inline.hpp"
27 #include "thread_bsd.inline.hpp"
28
29 // For Forte Analyzer AsyncGetCallTrace profiling support - thread is
30 // currently interrupted by SIGPROF
31 bool JavaThread::pd_get_top_frame_for_signal_handler(frame* fr_addr,
32 void* ucontext, bool isInJava) {
33
34 assert(Thread::current() == this, "caller must be current thread");
35 assert(this->is_Java_thread(), "must be JavaThread");
36
37 JavaThread* jt = (JavaThread *)this;
38
39 // If we have a last_Java_frame, then we should use it even if
40 // isInJava == true. It should be more reliable than ucontext info.
41 if (jt->has_last_Java_frame()) {
42 *fr_addr = jt->pd_last_frame();
43 return true;
44 }
45
46 // At this point, we don't have a last_Java_frame, so
47 // we try to glean some information out of the ucontext
48 // if we were running Java code when SIGPROF came in.
49 if (isInJava) {
50 ucontext_t* uc = (ucontext_t*) ucontext;
51
52 intptr_t* ret_fp;
53 intptr_t* ret_sp;
54 ExtendedPC addr = os::Bsd::fetch_frame_from_ucontext(this, uc,
55 &ret_sp, &ret_fp);
56 if (addr.pc() == NULL || ret_sp == NULL ) {
57 // ucontext wasn't useful
58 return false;
59 }
60
61 frame ret_frame(ret_sp, ret_fp, addr.pc());
62 if (!ret_frame.safe_for_sender(jt)) {
63 #ifdef COMPILER2
64 // C2 uses ebp as a general register see if NULL fp helps
65 frame ret_frame2(ret_sp, NULL, addr.pc());
66 if (!ret_frame2.safe_for_sender(jt)) {
67 // nothing else to try if the frame isn't good
68 return false;
69 }
70 ret_frame = ret_frame2;
71 #else
72 // nothing else to try if the frame isn't good
73 return false;
74 #endif /* COMPILER2 */
75 }
76 *fr_addr = ret_frame;
77 return true;
78 }
79
80 // nothing else to try
81 return false;
82 }
83
84 void JavaThread::cache_global_variables() { }