Mercurial > hg > graal-compiler
comparison src/os_cpu/linux_x86/vm/thread_linux_x86.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 | c18cbe5936b8 |
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-1:000000000000 | 0:a61af66fc99e |
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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_linux_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 ucontext 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 ucontext | |
47 // if we were running Java code when SIGPROF came in. | |
48 if (isInJava) { | |
49 ucontext_t* uc = (ucontext_t*) ucontext; | |
50 | |
51 intptr_t* ret_fp; | |
52 intptr_t* ret_sp; | |
53 ExtendedPC addr = os::Linux::fetch_frame_from_ucontext(this, uc, | |
54 &ret_sp, &ret_fp); | |
55 if (addr.pc() == NULL || ret_sp == NULL ) { | |
56 // ucontext wasn't useful | |
57 return false; | |
58 } | |
59 | |
60 frame ret_frame(ret_sp, ret_fp, addr.pc()); | |
61 if (!ret_frame.safe_for_sender(jt)) { | |
62 #ifdef COMPILER2 | |
63 // C2 uses ebp as a general register see if NULL fp helps | |
64 frame ret_frame2(ret_sp, NULL, addr.pc()); | |
65 if (!ret_frame2.safe_for_sender(jt)) { | |
66 // nothing else to try if the frame isn't good | |
67 return false; | |
68 } | |
69 ret_frame = ret_frame2; | |
70 #else | |
71 // nothing else to try if the frame isn't good | |
72 return false; | |
73 #endif /* COMPILER2 */ | |
74 } | |
75 *fr_addr = ret_frame; | |
76 return true; | |
77 } | |
78 | |
79 // nothing else to try | |
80 return false; | |
81 } |