| /* |
| * Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "memory/metaspaceShared.hpp" |
| #include "runtime/frame.inline.hpp" |
| #include "runtime/thread.inline.hpp" |
| |
| // For Forte Analyzer AsyncGetCallTrace profiling support - thread is |
| // currently interrupted by SIGPROF |
| bool JavaThread::pd_get_top_frame_for_signal_handler(frame* fr_addr, |
| void* ucontext, bool isInJava) { |
| assert(Thread::current() == this, "caller must be current thread"); |
| return pd_get_top_frame(fr_addr, ucontext, isInJava); |
| } |
| |
| bool JavaThread::pd_get_top_frame_for_profiling(frame* fr_addr, void* ucontext, bool isInJava) { |
| return pd_get_top_frame(fr_addr, ucontext, isInJava); |
| } |
| |
| bool JavaThread::pd_get_top_frame(frame* fr_addr, void* ucontext, bool isInJava) { |
| assert(this->is_Java_thread(), "must be JavaThread"); |
| JavaThread* jt = (JavaThread *)this; |
| |
| // If we have a last_Java_frame, then we should use it even if |
| // isInJava == true. It should be more reliable than ucontext info. |
| if (jt->has_last_Java_frame() && jt->frame_anchor()->walkable()) { |
| *fr_addr = jt->pd_last_frame(); |
| return true; |
| } |
| |
| // At this point, we don't have a last_Java_frame, so |
| // we try to glean some information out of the ucontext |
| // if we were running Java code when SIGPROF came in. |
| if (isInJava) { |
| ucontext_t* uc = (ucontext_t*) ucontext; |
| |
| intptr_t* ret_fp; |
| intptr_t* ret_sp; |
| ExtendedPC addr = os::Bsd::fetch_frame_from_ucontext(this, uc, |
| &ret_sp, &ret_fp); |
| if (addr.pc() == NULL || ret_sp == NULL ) { |
| // ucontext wasn't useful |
| return false; |
| } |
| |
| if (MetaspaceShared::is_in_trampoline_frame(addr.pc())) { |
| // In the middle of a trampoline call. Bail out for safety. |
| // This happens rarely so shouldn't affect profiling. |
| return false; |
| } |
| |
| frame ret_frame(ret_sp, ret_fp, addr.pc()); |
| if (!ret_frame.safe_for_sender(jt)) { |
| #if defined(COMPILER2) || INCLUDE_JVMCI |
| // C2 and JVMCI use ebp as a general register see if NULL fp helps |
| frame ret_frame2(ret_sp, NULL, addr.pc()); |
| if (!ret_frame2.safe_for_sender(jt)) { |
| // nothing else to try if the frame isn't good |
| return false; |
| } |
| ret_frame = ret_frame2; |
| #else |
| // nothing else to try if the frame isn't good |
| return false; |
| #endif /* COMPILER2 || INCLUDE_JVMCI */ |
| } |
| *fr_addr = ret_frame; |
| return true; |
| } |
| |
| // nothing else to try |
| return false; |
| } |
| |
| void JavaThread::cache_global_variables() { } |