Mercurial > hg > truffle
annotate src/os_cpu/linux_x86/vm/thread_linux_x86.cpp @ 7780:550c952f5d3f
Merge
author | Christian Humer <christian.humer@gmail.com> |
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date | Tue, 12 Feb 2013 16:06:20 +0100 |
parents | f34d701e952e |
children | f2110083203d |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "runtime/frame.inline.hpp" | |
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27 #include "runtime/thread.inline.hpp" |
0 | 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::Linux::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 } | |
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83 |
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84 void JavaThread::cache_global_variables() { } |
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85 |