annotate src/os_cpu/linux_x86/vm/thread_linux_x86.cpp @ 1563:c18cbe5936b8

6941466: Oracle rebranding changes for Hotspot repositories Summary: Change all the Sun copyrights to Oracle copyright Reviewed-by: ohair
author trims
date Thu, 27 May 2010 19:08:38 -0700
parents a61af66fc99e
children 126ea7725993
rev   line source
duke@0 1 /*
trims@1563 2 * Copyright (c) 2003, 2005, Oracle and/or its affiliates. All rights reserved.
duke@0 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@0 4 *
duke@0 5 * This code is free software; you can redistribute it and/or modify it
duke@0 6 * under the terms of the GNU General Public License version 2 only, as
duke@0 7 * published by the Free Software Foundation.
duke@0 8 *
duke@0 9 * This code is distributed in the hope that it will be useful, but WITHOUT
duke@0 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@0 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@0 12 * version 2 for more details (a copy is included in the LICENSE file that
duke@0 13 * accompanied this code).
duke@0 14 *
duke@0 15 * You should have received a copy of the GNU General Public License version
duke@0 16 * 2 along with this work; if not, write to the Free Software Foundation,
duke@0 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@0 18 *
trims@1563 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1563 20 * or visit www.oracle.com if you need additional information or have any
trims@1563 21 * questions.
duke@0 22 *
duke@0 23 */
duke@0 24
duke@0 25 #include "incls/_precompiled.incl"
duke@0 26 #include "incls/_thread_linux_x86.cpp.incl"
duke@0 27
duke@0 28 // For Forte Analyzer AsyncGetCallTrace profiling support - thread is
duke@0 29 // currently interrupted by SIGPROF
duke@0 30 bool JavaThread::pd_get_top_frame_for_signal_handler(frame* fr_addr,
duke@0 31 void* ucontext, bool isInJava) {
duke@0 32
duke@0 33 assert(Thread::current() == this, "caller must be current thread");
duke@0 34 assert(this->is_Java_thread(), "must be JavaThread");
duke@0 35
duke@0 36 JavaThread* jt = (JavaThread *)this;
duke@0 37
duke@0 38 // If we have a last_Java_frame, then we should use it even if
duke@0 39 // isInJava == true. It should be more reliable than ucontext info.
duke@0 40 if (jt->has_last_Java_frame()) {
duke@0 41 *fr_addr = jt->pd_last_frame();
duke@0 42 return true;
duke@0 43 }
duke@0 44
duke@0 45 // At this point, we don't have a last_Java_frame, so
duke@0 46 // we try to glean some information out of the ucontext
duke@0 47 // if we were running Java code when SIGPROF came in.
duke@0 48 if (isInJava) {
duke@0 49 ucontext_t* uc = (ucontext_t*) ucontext;
duke@0 50
duke@0 51 intptr_t* ret_fp;
duke@0 52 intptr_t* ret_sp;
duke@0 53 ExtendedPC addr = os::Linux::fetch_frame_from_ucontext(this, uc,
duke@0 54 &ret_sp, &ret_fp);
duke@0 55 if (addr.pc() == NULL || ret_sp == NULL ) {
duke@0 56 // ucontext wasn't useful
duke@0 57 return false;
duke@0 58 }
duke@0 59
duke@0 60 frame ret_frame(ret_sp, ret_fp, addr.pc());
duke@0 61 if (!ret_frame.safe_for_sender(jt)) {
duke@0 62 #ifdef COMPILER2
duke@0 63 // C2 uses ebp as a general register see if NULL fp helps
duke@0 64 frame ret_frame2(ret_sp, NULL, addr.pc());
duke@0 65 if (!ret_frame2.safe_for_sender(jt)) {
duke@0 66 // nothing else to try if the frame isn't good
duke@0 67 return false;
duke@0 68 }
duke@0 69 ret_frame = ret_frame2;
duke@0 70 #else
duke@0 71 // nothing else to try if the frame isn't good
duke@0 72 return false;
duke@0 73 #endif /* COMPILER2 */
duke@0 74 }
duke@0 75 *fr_addr = ret_frame;
duke@0 76 return true;
duke@0 77 }
duke@0 78
duke@0 79 // nothing else to try
duke@0 80 return false;
duke@0 81 }