src/os_cpu/linux_x86/vm/thread_linux_x86.cpp

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   1 /*
   2  * Copyright (c) 2003, 2005, 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 "incls/_precompiled.incl"
  26 #include "incls/_thread_linux_x86.cpp.incl"

  27 
  28 // For Forte Analyzer AsyncGetCallTrace profiling support - thread is
  29 // currently interrupted by SIGPROF
  30 bool JavaThread::pd_get_top_frame_for_signal_handler(frame* fr_addr,
  31   void* ucontext, bool isInJava) {
  32 
  33   assert(Thread::current() == this, "caller must be current thread");
  34   assert(this->is_Java_thread(), "must be JavaThread");
  35 
  36   JavaThread* jt = (JavaThread *)this;
  37 
  38   // If we have a last_Java_frame, then we should use it even if
  39   // isInJava == true.  It should be more reliable than ucontext info.
  40   if (jt->has_last_Java_frame()) {
  41     *fr_addr = jt->pd_last_frame();
  42     return true;
  43   }
  44 
  45   // At this point, we don't have a last_Java_frame, so
  46   // we try to glean some information out of the ucontext


   1 /*
   2  * Copyright (c) 2003, 2010, 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 "runtime/frame.inline.hpp"
  27 #include "thread_linux.inline.hpp"
  28 
  29 // For Forte Analyzer AsyncGetCallTrace profiling support - thread is
  30 // currently interrupted by SIGPROF
  31 bool JavaThread::pd_get_top_frame_for_signal_handler(frame* fr_addr,
  32   void* ucontext, bool isInJava) {
  33 
  34   assert(Thread::current() == this, "caller must be current thread");
  35   assert(this->is_Java_thread(), "must be JavaThread");
  36 
  37   JavaThread* jt = (JavaThread *)this;
  38 
  39   // If we have a last_Java_frame, then we should use it even if
  40   // isInJava == true.  It should be more reliable than ucontext info.
  41   if (jt->has_last_Java_frame()) {
  42     *fr_addr = jt->pd_last_frame();
  43     return true;
  44   }
  45 
  46   // At this point, we don't have a last_Java_frame, so
  47   // we try to glean some information out of the ucontext