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 "runtime/thread.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 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 CONTEXT 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 CONTEXT 48 // if we were running Java code when SIGPROF came in. 49 if (isInJava) { 50 CONTEXT* uc = (CONTEXT*)ucontext; 51 52 #ifdef AMD64 53 intptr_t* ret_fp = (intptr_t*) uc->Rbp; 54 intptr_t* ret_sp = (intptr_t*) uc->Rsp; 55 ExtendedPC addr = ExtendedPC((address)uc->Rip); 56 #else 57 intptr_t* ret_fp = (intptr_t*) uc->Ebp; 58 intptr_t* ret_sp = (intptr_t*) uc->Esp; 59 ExtendedPC addr = ExtendedPC((address)uc->Eip); 60 #endif // AMD64 61 if (addr.pc() == NULL || ret_sp == NULL ) { 62 // CONTEXT wasn't useful 63 return false; 64 } 65 66 frame ret_frame(ret_sp, ret_fp, addr.pc()); 67 if (!ret_frame.safe_for_sender(jt)) { 68 #ifdef COMPILER2 69 // C2 uses ebp as a general register see if NULL fp helps 70 frame ret_frame2(ret_sp, NULL, addr.pc()); 71 if (!ret_frame2.safe_for_sender(jt)) { 72 // nothing else to try if the frame isn't good 73 return false; 74 } 75 ret_frame = ret_frame2; 76 #else 77 // nothing else to try if the frame isn't good 78 return false; 79 #endif /* COMPILER2 */ 80 } 81 *fr_addr = ret_frame; 82 return true; 83 } 84 85 // nothing else to try 86 return false; 87 } 88 89 void JavaThread::cache_global_variables() { } 90