1 /*
   2  * Copyright (c) 2012, 2018, 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 "code/debugInfoRec.hpp"
  27 #include "code/nmethod.hpp"
  28 #include "code/pcDesc.hpp"
  29 #include "jfr/periodic/sampling/jfrCallTrace.hpp"
  30 #include "oops/method.hpp"
  31 #include "runtime/javaCalls.hpp"
  32 #include "runtime/frame.inline.hpp"
  33 #include "runtime/registerMap.hpp"
  34 #include "runtime/thread.inline.hpp"
  35 
  36 bool JfrGetCallTrace::find_top_frame(frame& top_frame, Method** method, frame& first_frame) {
  37   assert(top_frame.cb() != NULL, "invariant");
  38   RegisterMap map(_thread, false);
  39   frame candidate = top_frame;
  40   for (int i = 0; i < MaxJavaStackTraceDepth * 2; ++i) {
  41     if (candidate.is_entry_frame()) {
  42       JavaCallWrapper *jcw = candidate.entry_frame_call_wrapper_if_safe(_thread);
  43       if (jcw == NULL || jcw->is_first_frame()) {
  44         return false;
  45       }
  46     }
  47 
  48     if (candidate.is_interpreted_frame()) {
  49       JavaThreadState state = _thread->thread_state();
  50       const bool known_valid = (state == _thread_in_native || state == _thread_in_vm || state == _thread_blocked);
  51       if (known_valid || candidate.is_interpreted_frame_valid(_thread)) {
  52         Method* im = candidate.interpreter_frame_method();
  53         if (known_valid && !Method::is_valid_method(im)) {
  54           return false;
  55         }
  56         *method = im;
  57         first_frame = candidate;
  58         return true;
  59       }
  60     }

   1 /*
   2  * Copyright (c) 2012, 2019, 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 "code/debugInfoRec.hpp"
  27 #include "code/nmethod.hpp"
  28 #include "code/pcDesc.hpp"
  29 #include "jfr/periodic/sampling/jfrCallTrace.hpp"
  30 #include "oops/method.hpp"
  31 #include "runtime/javaCalls.hpp"
  32 #include "runtime/frame.inline.hpp"
  33 #include "runtime/registerMap.hpp"
  34 #include "runtime/thread.inline.hpp"
  35 
  36 bool JfrGetCallTrace::find_top_frame(frame& top_frame, Method** method, frame& first_frame) {
  37   assert(top_frame.cb() != NULL, "invariant");
  38   RegisterMap map(_thread, false);
  39   frame candidate = top_frame;
  40   for (u4 i = 0; i < MAX_STACK_DEPTH * 2; ++i) {
  41     if (candidate.is_entry_frame()) {
  42       JavaCallWrapper *jcw = candidate.entry_frame_call_wrapper_if_safe(_thread);
  43       if (jcw == NULL || jcw->is_first_frame()) {
  44         return false;
  45       }
  46     }
  47 
  48     if (candidate.is_interpreted_frame()) {
  49       JavaThreadState state = _thread->thread_state();
  50       const bool known_valid = (state == _thread_in_native || state == _thread_in_vm || state == _thread_blocked);
  51       if (known_valid || candidate.is_interpreted_frame_valid(_thread)) {
  52         Method* im = candidate.interpreter_frame_method();
  53         if (known_valid && !Method::is_valid_method(im)) {
  54           return false;
  55         }
  56         *method = im;
  57         first_frame = candidate;
  58         return true;
  59       }
  60     }