1 /*
2 * Copyright (c) 2003, 2013, 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 *
53
54 ucontext_t* uc = (ucontext_t*) ucontext;
55
56 // We always want to use the initial frame we create from the ucontext as
57 // it certainly signals where we currently are. However that frame may not
58 // be safe for calling sender. In that case if we have a last_Java_frame
59 // then the forte walker will switch to that frame as the virtual sender
60 // for the frame we create here which is not sender safe.
61
62 intptr_t* ret_fp;
63 intptr_t* ret_sp;
64 ExtendedPC addr = os::Solaris::fetch_frame_from_ucontext(this, uc, &ret_sp, &ret_fp);
65
66 // Something would really have to be screwed up to get a NULL pc
67
68 if (addr.pc() == NULL) {
69 assert(false, "NULL pc from signal handler!");
70 return false;
71 }
72
73 #if INCLUDE_CDS
74 if (UseSharedSpaces && MetaspaceShared::is_in_shared_region(addr.pc(), MetaspaceShared::md)) {
75 // In the middle of a trampoline call. Bail out for safety.
76 // This happens rarely so shouldn't affect profiling.
77 return false;
78 }
79 #endif
80
81 // If sp and fp are nonsense just leave them out
82
83 if (!jt->on_local_stack((address)ret_sp)) {
84 ret_sp = NULL;
85 ret_fp = NULL;
86 } else {
87 // sp is reasonable is fp reasonable?
88 if ((address)ret_fp >= jt->stack_base() || ret_fp < ret_sp) {
89 ret_fp = NULL;
90 }
91 }
92
93 frame ret_frame(ret_sp, ret_fp, addr.pc());
94
95 *fr_addr = ret_frame;
96 return true;
97
98 }
99
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1 /*
2 * Copyright (c) 2003, 2017, 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 *
53
54 ucontext_t* uc = (ucontext_t*) ucontext;
55
56 // We always want to use the initial frame we create from the ucontext as
57 // it certainly signals where we currently are. However that frame may not
58 // be safe for calling sender. In that case if we have a last_Java_frame
59 // then the forte walker will switch to that frame as the virtual sender
60 // for the frame we create here which is not sender safe.
61
62 intptr_t* ret_fp;
63 intptr_t* ret_sp;
64 ExtendedPC addr = os::Solaris::fetch_frame_from_ucontext(this, uc, &ret_sp, &ret_fp);
65
66 // Something would really have to be screwed up to get a NULL pc
67
68 if (addr.pc() == NULL) {
69 assert(false, "NULL pc from signal handler!");
70 return false;
71 }
72
73 if (MetaspaceShared::is_in_trampoline_frame(addr.pc())) {
74 // In the middle of a trampoline call. Bail out for safety.
75 // This happens rarely so shouldn't affect profiling.
76 return false;
77 }
78
79 // If sp and fp are nonsense just leave them out
80
81 if (!jt->on_local_stack((address)ret_sp)) {
82 ret_sp = NULL;
83 ret_fp = NULL;
84 } else {
85 // sp is reasonable is fp reasonable?
86 if ((address)ret_fp >= jt->stack_base() || ret_fp < ret_sp) {
87 ret_fp = NULL;
88 }
89 }
90
91 frame ret_frame(ret_sp, ret_fp, addr.pc());
92
93 *fr_addr = ret_frame;
94 return true;
95
96 }
97
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