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src/share/vm/utilities/nativeCallStack.cpp

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   1 /*
   2  * Copyright (c) 2014, 2015, 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/os.hpp"
  27 #include "utilities/globalDefinitions.hpp"
  28 #include "utilities/nativeCallStack.hpp"
  29 
  30 const NativeCallStack NativeCallStack::EMPTY_STACK(0, false);
  31 
  32 NativeCallStack::NativeCallStack(int toSkip, bool fillStack) :
  33   _hash_value(0) {
  34 
  35   if (fillStack) {













  36     os::get_native_stack(_stack, NMT_TrackingStackDepth, toSkip);
  37   } else {
  38     for (int index = 0; index < NMT_TrackingStackDepth; index ++) {
  39       _stack[index] = NULL;
  40     }
  41   }
  42 }
  43 
  44 NativeCallStack::NativeCallStack(address* pc, int frameCount) {
  45   int frameToCopy = (frameCount < NMT_TrackingStackDepth) ?
  46     frameCount : NMT_TrackingStackDepth;
  47   int index;
  48   for (index = 0; index < frameToCopy; index ++) {
  49     _stack[index] = pc[index];
  50   }
  51   for (; index < NMT_TrackingStackDepth; index ++) {
  52     _stack[index] = NULL;
  53   }
  54   _hash_value = 0;
  55 }


   1 /*
   2  * Copyright (c) 2014, 2016, 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/os.hpp"
  27 #include "utilities/globalDefinitions.hpp"
  28 #include "utilities/nativeCallStack.hpp"
  29 
  30 const NativeCallStack NativeCallStack::EMPTY_STACK(0, false);
  31 
  32 NativeCallStack::NativeCallStack(int toSkip, bool fillStack) :
  33   _hash_value(0) {
  34 
  35   if (fillStack) {
  36     // We need to skip the NativeCallStack::NativeCallStack frame if a tail call is NOT used
  37     // to call os::get_native_stack. A tail call is used if _NMT_NOINLINE_ is not defined
  38     // (which means this is not a slowdebug build), and we are on 64-bit (except Windows).
  39     // This is not necessarily a rule, but what has been obvserved to date.
  40 #define TAIL_CALL (!defined(_NMT_NOINLINE_) && !defined(WINDOWS) && defined(_LP64))
  41 #if !TAIL_CALL
  42     toSkip++;
  43 #if (defined(_NMT_NOINLINE_) && defined(BSD) && defined(_LP64))
  44     // Mac OS X slowdebug builds have this odd behavior where NativeCallStack::NativeCallStack
  45     // appears as two frames, so we need to skip an extra frame.
  46     toSkip++;
  47 #endif
  48 #endif
  49     os::get_native_stack(_stack, NMT_TrackingStackDepth, toSkip);
  50   } else {
  51     for (int index = 0; index < NMT_TrackingStackDepth; index ++) {
  52       _stack[index] = NULL;
  53     }
  54   }
  55 }
  56 
  57 NativeCallStack::NativeCallStack(address* pc, int frameCount) {
  58   int frameToCopy = (frameCount < NMT_TrackingStackDepth) ?
  59     frameCount : NMT_TrackingStackDepth;
  60   int index;
  61   for (index = 0; index < frameToCopy; index ++) {
  62     _stack[index] = pc[index];
  63   }
  64   for (; index < NMT_TrackingStackDepth; index ++) {
  65     _stack[index] = NULL;
  66   }
  67   _hash_value = 0;
  68 }


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