1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/os_cpu/bsd_x86/vm/thread_bsd_x86.cpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,90 @@
1.4 +/*
1.5 + * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#include "precompiled.hpp"
1.29 +#include "runtime/frame.inline.hpp"
1.30 +#include "runtime/thread.inline.hpp"
1.31 +
1.32 +// For Forte Analyzer AsyncGetCallTrace profiling support - thread is
1.33 +// currently interrupted by SIGPROF
1.34 +bool JavaThread::pd_get_top_frame_for_signal_handler(frame* fr_addr,
1.35 + void* ucontext, bool isInJava) {
1.36 + assert(Thread::current() == this, "caller must be current thread");
1.37 + return pd_get_top_frame(fr_addr, ucontext, isInJava);
1.38 +}
1.39 +
1.40 +bool JavaThread::pd_get_top_frame_for_profiling(frame* fr_addr, void* ucontext, bool isInJava) {
1.41 + return pd_get_top_frame(fr_addr, ucontext, isInJava);
1.42 +}
1.43 +
1.44 +bool JavaThread::pd_get_top_frame(frame* fr_addr, void* ucontext, bool isInJava) {
1.45 + assert(this->is_Java_thread(), "must be JavaThread");
1.46 + JavaThread* jt = (JavaThread *)this;
1.47 +
1.48 + // If we have a last_Java_frame, then we should use it even if
1.49 + // isInJava == true. It should be more reliable than ucontext info.
1.50 + if (jt->has_last_Java_frame()) {
1.51 + *fr_addr = jt->pd_last_frame();
1.52 + return true;
1.53 + }
1.54 +
1.55 + // At this point, we don't have a last_Java_frame, so
1.56 + // we try to glean some information out of the ucontext
1.57 + // if we were running Java code when SIGPROF came in.
1.58 + if (isInJava) {
1.59 + ucontext_t* uc = (ucontext_t*) ucontext;
1.60 +
1.61 + intptr_t* ret_fp;
1.62 + intptr_t* ret_sp;
1.63 + ExtendedPC addr = os::Bsd::fetch_frame_from_ucontext(this, uc,
1.64 + &ret_sp, &ret_fp);
1.65 + if (addr.pc() == NULL || ret_sp == NULL ) {
1.66 + // ucontext wasn't useful
1.67 + return false;
1.68 + }
1.69 +
1.70 + frame ret_frame(ret_sp, ret_fp, addr.pc());
1.71 + if (!ret_frame.safe_for_sender(jt)) {
1.72 +#ifdef COMPILER2
1.73 + // C2 uses ebp as a general register see if NULL fp helps
1.74 + frame ret_frame2(ret_sp, NULL, addr.pc());
1.75 + if (!ret_frame2.safe_for_sender(jt)) {
1.76 + // nothing else to try if the frame isn't good
1.77 + return false;
1.78 + }
1.79 + ret_frame = ret_frame2;
1.80 +#else
1.81 + // nothing else to try if the frame isn't good
1.82 + return false;
1.83 +#endif /* COMPILER2 */
1.84 + }
1.85 + *fr_addr = ret_frame;
1.86 + return true;
1.87 + }
1.88 +
1.89 + // nothing else to try
1.90 + return false;
1.91 +}
1.92 +
1.93 +void JavaThread::cache_global_variables() { }
