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 35 assert(Thread::current() == this, "caller must be current thread"); 36 return pd_get_top_frame(fr_addr, ucontext, isInJava); 37 } 38 39 bool JavaThread::pd_get_top_frame_for_profiling(frame* fr_addr, 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, void* ucontext, bool isInJava) { 44 45 assert(this->is_Java_thread(), "must be JavaThread"); 46 47 JavaThread* jt = (JavaThread *)this; 48 49 // If we have a last_Java_frame, then we should use it even if 50 // isInJava == true. It should be more reliable than CONTEXT info. 51 if (jt->has_last_Java_frame() && jt->frame_anchor()->walkable()) { 52 *fr_addr = jt->pd_last_frame(); 53 return true; 54 } 55 56 // At this point, we don't have a last_Java_frame, so 57 // we try to glean some information out of the CONTEXT 58 // if we were running Java code when SIGPROF came in. 59 if (isInJava) { 60 CONTEXT* uc = (CONTEXT*)ucontext; 61 62 #ifdef AMD64 63 intptr_t* ret_fp = (intptr_t*) uc->Rbp; 64 intptr_t* ret_sp = (intptr_t*) uc->Rsp; 65 ExtendedPC addr = ExtendedPC((address)uc->Rip); 66 #else 67 intptr_t* ret_fp = (intptr_t*) uc->Ebp; 68 intptr_t* ret_sp = (intptr_t*) uc->Esp; 69 ExtendedPC addr = ExtendedPC((address)uc->Eip); 70 #endif // AMD64 71 if (addr.pc() == NULL || ret_sp == NULL ) { 72 // CONTEXT wasn't useful 73 return false; 74 } 75 76 #if INCLUDE_CDS 77 if (UseSharedSpaces && MetaspaceShared::is_in_shared_region(addr.pc(), MetaspaceShared::md)) { 78 // In the middle of a trampoline call. Bail out for safety. 79 // This happens rarely so shouldn't affect profiling. 80 return false; 81 } 82 #endif 83 84 frame ret_frame(ret_sp, ret_fp, addr.pc()); 85 if (!ret_frame.safe_for_sender(jt)) { 86 #if defined(COMPILER2) || INCLUDE_JVMCI 87 // C2 and JVMCI use ebp as a general register see if NULL fp helps 88 frame ret_frame2(ret_sp, NULL, addr.pc()); 89 if (!ret_frame2.safe_for_sender(jt)) { 90 // nothing else to try if the frame isn't good 91 return false; 92 } 93 ret_frame = ret_frame2; 94 #else 95 // nothing else to try if the frame isn't good 96 return false; 97 #endif /* COMPILER2 || INCLUDE_JVMCI */ 98 } 99 *fr_addr = ret_frame; 100 return true; 101 } 102 103 // nothing else to try 104 return false; 105 } 106 107 void JavaThread::cache_global_variables() { }