0N/A/*
1879N/A * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
1472N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1472N/A * or visit www.oracle.com if you need additional information or have any
1472N/A * questions.
0N/A *
0N/A */
0N/A
1879N/A#include "precompiled.hpp"
1879N/A#include "runtime/frame.inline.hpp"
1879N/A#include "thread_linux.inline.hpp"
0N/A
0N/A// For Forte Analyzer AsyncGetCallTrace profiling support - thread is
0N/A// currently interrupted by SIGPROF
0N/Abool JavaThread::pd_get_top_frame_for_signal_handler(frame* fr_addr,
0N/A void* ucontext, bool isInJava) {
0N/A
0N/A assert(Thread::current() == this, "caller must be current thread");
4141N/A return pd_get_top_frame(fr_addr, ucontext, isInJava);
4141N/A}
4141N/A
4141N/Abool JavaThread::pd_get_top_frame_for_profiling(frame* fr_addr, void* ucontext, bool isInJava) {
4141N/A return pd_get_top_frame(fr_addr, ucontext, isInJava);
4141N/A}
4141N/A
4141N/Abool JavaThread::pd_get_top_frame(frame* fr_addr, void* ucontext, bool isInJava) {
0N/A assert(this->is_Java_thread(), "must be JavaThread");
0N/A JavaThread* jt = (JavaThread *)this;
0N/A
0N/A // If we have a last_Java_frame, then we should use it even if
0N/A // isInJava == true. It should be more reliable than ucontext info.
0N/A if (jt->has_last_Java_frame()) {
0N/A *fr_addr = jt->pd_last_frame();
0N/A return true;
0N/A }
0N/A
0N/A // At this point, we don't have a last_Java_frame, so
0N/A // we try to glean some information out of the ucontext
0N/A // if we were running Java code when SIGPROF came in.
0N/A if (isInJava) {
0N/A ucontext_t* uc = (ucontext_t*) ucontext;
0N/A
0N/A intptr_t* ret_fp;
0N/A intptr_t* ret_sp;
0N/A ExtendedPC addr = os::Linux::fetch_frame_from_ucontext(this, uc,
0N/A &ret_sp, &ret_fp);
0N/A if (addr.pc() == NULL || ret_sp == NULL ) {
0N/A // ucontext wasn't useful
0N/A return false;
0N/A }
0N/A
0N/A frame ret_frame(ret_sp, ret_fp, addr.pc());
0N/A if (!ret_frame.safe_for_sender(jt)) {
0N/A#ifdef COMPILER2
0N/A // C2 uses ebp as a general register see if NULL fp helps
0N/A frame ret_frame2(ret_sp, NULL, addr.pc());
0N/A if (!ret_frame2.safe_for_sender(jt)) {
0N/A // nothing else to try if the frame isn't good
0N/A return false;
0N/A }
0N/A ret_frame = ret_frame2;
0N/A#else
0N/A // nothing else to try if the frame isn't good
0N/A return false;
0N/A#endif /* COMPILER2 */
0N/A }
0N/A *fr_addr = ret_frame;
0N/A return true;
0N/A }
0N/A
0N/A // nothing else to try
0N/A return false;
0N/A}
1601N/A
1601N/Avoid JavaThread::cache_global_variables() { }
1601N/A