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_solaris.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 JavaThread* jt = (JavaThread *)this; 37 38 // last_Java_frame is always walkable and safe use it if we have it 39 40 if (jt->has_last_Java_frame()) { 41 *fr_addr = jt->pd_last_frame(); 42 return true; 43 } 44 45 ucontext_t* uc = (ucontext_t*) ucontext; 46 47 // We always want to use the initial frame we create from the ucontext as 48 // it certainly signals where we currently are. However that frame may not 49 // be safe for calling sender. In that case if we have a last_Java_frame 50 // then the forte walker will switch to that frame as the virtual sender 51 // for the frame we create here which is not sender safe. 52 53 intptr_t* ret_fp; 54 intptr_t* ret_sp; 55 ExtendedPC addr = os::Solaris::fetch_frame_from_ucontext(this, uc, &ret_sp, &ret_fp); 56 57 // Something would really have to be screwed up to get a NULL pc 58 59 if (addr.pc() == NULL ) { 60 assert(false, "NULL pc from signal handler!"); 61 return false; 62 63 } 64 65 // If sp and fp are nonsense just leave them out 66 67 if ((address)ret_sp >= jt->stack_base() || 68 (address)ret_sp < jt->stack_base() - jt->stack_size() ) { 69 70 ret_sp = NULL; 71 ret_fp = NULL; 72 } else { 73 74 // sp is reasonable is fp reasonable? 75 if ( (address)ret_fp >= jt->stack_base() || ret_fp < ret_sp) { 76 ret_fp = NULL; 77 } 78 } 79 80 frame ret_frame(ret_sp, ret_fp, addr.pc()); 81 82 *fr_addr = ret_frame; 83 return true; 84 85 } 86 87 void JavaThread::cache_global_variables() { } 88