jdk8-mips64-public/hotspot: src/share/vm/utilities/nativeCallStack.cpp@833b0f92429a

8046598: Scalable Native memory tracking development
Summary: Enhance scalability of native memory tracking
Reviewed-by: coleenp, ctornqvi, gtriantafill

     1 /*

     2  * Copyright (c) 2014, 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  */

    25 #include "precompiled.hpp"

    26 #include "runtime/os.hpp"

    27 #include "utilities/globalDefinitions.hpp"

    28 #include "utilities/nativeCallStack.hpp"

    31 NativeCallStack::NativeCallStack(int toSkip, bool fillStack) :

    32   _hash_value(0) {

    34 #if !PLATFORM_NATIVE_STACK_WALKING_SUPPORTED

    35   fillStack = false;

    36 #endif

    38   if (fillStack) {

    39     os::get_native_stack(_stack, NMT_TrackingStackDepth, toSkip);

    40   } else {

    41     for (int index = 0; index < NMT_TrackingStackDepth; index ++) {

    42       _stack[index] = NULL;

    43     }

    44   }

    45 }

    47 NativeCallStack::NativeCallStack(address* pc, int frameCount) {

    48   int frameToCopy = (frameCount < NMT_TrackingStackDepth) ?

    49     frameCount : NMT_TrackingStackDepth;

    50   int index;

    51   for (index = 0; index < frameToCopy; index ++) {

    52     _stack[index] = pc[index];

    53   }

    54   for (; index < NMT_TrackingStackDepth; index ++) {

    55     _stack[index] = NULL;

    56   }

    57 }

    59 // number of stack frames captured

    60 int NativeCallStack::frames() const {

    61   int index;

    62   for (index = 0; index < NMT_TrackingStackDepth; index ++) {

    63     if (_stack[index] == NULL) {

    64       break;

    65     }

    66   }

    67   return index;

    68 }

    70 // Hash code. Any better algorithm?

    71 int NativeCallStack::hash() const {

    72   long hash_val = _hash_value;

    73   if (hash_val == 0) {

    74     long pc;

    75     int  index;

    76     for (index = 0; index < NMT_TrackingStackDepth; index ++) {

    77       pc = (long)_stack[index];

    78       if (pc == 0) break;

    79       hash_val += pc;

    80     }

    82     NativeCallStack* p = const_cast<NativeCallStack*>(this);

    83     p->_hash_value = (int)(hash_val & 0xFFFFFFFF);

    84   }

    85   return _hash_value;

    86 }

    88 void NativeCallStack::print_on(outputStream* out) const {

    89   print_on(out, 0);

    90 }

    92 // Decode and print this call path

    93 void NativeCallStack::print_on(outputStream* out, int indent) const {

    94   address pc;

    95   char    buf[1024];

    96   int     offset;

    97   if (is_empty()) {

    98     for (int index = 0; index < indent; index ++) out->print(" ");

    99 #if PLATFORM_NATIVE_STACK_WALKING_SUPPORTED

   100     out->print("[BOOTSTRAP]");

   101 #else

   102     out->print("[No stack]");

   103 #endif

   104   } else {

   105     for (int frame = 0; frame < NMT_TrackingStackDepth; frame ++) {

   106       pc = get_frame(frame);

   107       if (pc == NULL) break;

   108       // Print indent

   109       for (int index = 0; index < indent; index ++) out->print(" ");

   110       if (os::dll_address_to_function_name(pc, buf, sizeof(buf), &offset)) {

   111         out->print_cr("[" PTR_FORMAT "] %s+0x%x", p2i(pc), buf, offset);

   112       } else {

   113         out->print_cr("[" PTR_FORMAT "]", p2i(pc));

   114       }

   115     }

   116   }

   117 }

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/utilities/nativeCallStack.cpp@833b0f92429a

src/share/vm/utilities/nativeCallStack.cpp