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 "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 return pd_get_top_frame(fr_addr, ucontext, isInJava); 36 } 37 38 bool JavaThread::pd_get_top_frame_for_profiling(frame* fr_addr, void* ucontext, bool isInJava) { 39 return pd_get_top_frame(fr_addr, ucontext, isInJava); 40 } 41 42 bool JavaThread::pd_get_top_frame(frame* fr_addr, void* ucontext, bool isInJava) { 43 44 assert(this->is_Java_thread(), "must be JavaThread"); 45 46 JavaThread* jt = (JavaThread *)this; 47 48 // If we have a last_Java_frame, then we should use it even if 49 // isInJava == true. It should be more reliable than CONTEXT info. 50 if (jt->has_last_Java_frame()) { 51 *fr_addr = jt->pd_last_frame(); 52 return true; 53 } 54 55 // At this point, we don't have a last_Java_frame, so 56 // we try to glean some information out of the CONTEXT 57 // if we were running Java code when SIGPROF came in. 58 if (isInJava) { 59 CONTEXT* uc = (CONTEXT*)ucontext; 60 61 #ifdef AMD64 62 intptr_t* ret_fp = (intptr_t*) uc->Rbp; 63 intptr_t* ret_sp = (intptr_t*) uc->Rsp; 64 ExtendedPC addr = ExtendedPC((address)uc->Rip); 65 #else 66 intptr_t* ret_fp = (intptr_t*) uc->Ebp; 67 intptr_t* ret_sp = (intptr_t*) uc->Esp; 68 ExtendedPC addr = ExtendedPC((address)uc->Eip); 69 #endif // AMD64 70 if (addr.pc() == NULL || ret_sp == NULL ) { 71 // CONTEXT wasn't useful 72 return false; 73 } 74 75 frame ret_frame(ret_sp, ret_fp, addr.pc()); 76 if (!ret_frame.safe_for_sender(jt)) { 77 #ifdef COMPILER2 78 // C2 uses ebp as a general register see if NULL fp helps 79 frame ret_frame2(ret_sp, NULL, addr.pc()); 80 if (!ret_frame2.safe_for_sender(jt)) { 81 // nothing else to try if the frame isn't good 82 return false; 83 } 84 ret_frame = ret_frame2; 85 #else 86 // nothing else to try if the frame isn't good 87 return false; 88 #endif /* COMPILER2 */ 89 } 90 *fr_addr = ret_frame; 91 return true; 92 } 93 94 // nothing else to try 95 return false; 96 } 97 98 void JavaThread::cache_global_variables() { }