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 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "memory/metaspaceShared.hpp" 27 #include "runtime/frame.inline.hpp" 28 #include "runtime/thread.inline.hpp" 29 30 // For Forte Analyzer AsyncGetCallTrace profiling support - thread is 31 // currently interrupted by SIGPROF 32 bool JavaThread::pd_get_top_frame_for_signal_handler(frame* fr_addr, 33 void* ucontext, bool isInJava) { 34 assert(Thread::current() == this, "caller must be current thread"); 35 return pd_get_top_frame(fr_addr, ucontext, isInJava); 36 } 37 38 bool JavaThread::pd_get_top_frame_for_profiling(frame* fr_addr, 39 void* ucontext, bool isInJava) { 40 return pd_get_top_frame(fr_addr, ucontext, isInJava); 41 } 42 43 bool JavaThread::pd_get_top_frame(frame* fr_addr, 44 void* ucontext, bool isInJava) { 45 assert(this->is_Java_thread(), "must be JavaThread"); 46 JavaThread* jt = (JavaThread *)this; 47 48 // There is small window where last_Java_frame is not walkable or safe 49 if (jt->has_last_Java_frame() && jt->frame_anchor()->walkable()) { 50 *fr_addr = jt->pd_last_frame(); 51 return true; 52 } 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 } 99 100 void JavaThread::cache_global_variables() { } 101