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

src/share/vm/utilities/nativeCallStack.cpp@833b0f92429a (annotated)

src/share/vm/utilities/nativeCallStack.cpp

Wed, 27 Aug 2014 08:19:12 -0400

author: zgu
date: Wed, 27 Aug 2014 08:19:12 -0400
changeset 7074: 833b0f92429a
child 7078: c6211b707068
permissions: -rw-r--r--

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

 /*
  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #include "precompiled.hpp"
 #include "runtime/os.hpp"
 #include "utilities/globalDefinitions.hpp"
 #include "utilities/nativeCallStack.hpp"
 NativeCallStack::NativeCallStack(int toSkip, bool fillStack) :
   _hash_value(0) {
 #if !PLATFORM_NATIVE_STACK_WALKING_SUPPORTED
   fillStack = false;
 #endif
   if (fillStack) {
     os::get_native_stack(_stack, NMT_TrackingStackDepth, toSkip);
   } else {
     for (int index = 0; index < NMT_TrackingStackDepth; index ++) {
       _stack[index] = NULL;
     }
   }
 }
 NativeCallStack::NativeCallStack(address* pc, int frameCount) {
   int frameToCopy = (frameCount < NMT_TrackingStackDepth) ?
     frameCount : NMT_TrackingStackDepth;
   int index;
   for (index = 0; index < frameToCopy; index ++) {
     _stack[index] = pc[index];
   }
   for (; index < NMT_TrackingStackDepth; index ++) {
     _stack[index] = NULL;
   }
 }
 // number of stack frames captured
 int NativeCallStack::frames() const {
   int index;
   for (index = 0; index < NMT_TrackingStackDepth; index ++) {
     if (_stack[index] == NULL) {
       break;
     }
   }
   return index;
 }
 // Hash code. Any better algorithm?
 int NativeCallStack::hash() const {
   long hash_val = _hash_value;
   if (hash_val == 0) {
     long pc;
     int  index;
     for (index = 0; index < NMT_TrackingStackDepth; index ++) {
       pc = (long)_stack[index];
       if (pc == 0) break;
       hash_val += pc;
     }
     NativeCallStack* p = const_cast<NativeCallStack*>(this);
     p->_hash_value = (int)(hash_val & 0xFFFFFFFF);
   }
   return _hash_value;
 }
 void NativeCallStack::print_on(outputStream* out) const {
   print_on(out, 0);
 }
 // Decode and print this call path
 void NativeCallStack::print_on(outputStream* out, int indent) const {
   address pc;
   char    buf[1024];
   int     offset;
   if (is_empty()) {
     for (int index = 0; index < indent; index ++) out->print(" ");
 #if PLATFORM_NATIVE_STACK_WALKING_SUPPORTED
     out->print("[BOOTSTRAP]");
 #else
     out->print("[No stack]");
 #endif
   } else {
     for (int frame = 0; frame < NMT_TrackingStackDepth; frame ++) {
       pc = get_frame(frame);
       if (pc == NULL) break;
       // Print indent
       for (int index = 0; index < indent; index ++) out->print(" ");
       if (os::dll_address_to_function_name(pc, buf, sizeof(buf), &offset)) {
         out->print_cr("[" PTR_FORMAT "] %s+0x%x", p2i(pc), buf, offset);
       } else {
         out->print_cr("[" PTR_FORMAT "]", p2i(pc));
       }
     }
   }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/utilities/nativeCallStack.cpp@833b0f92429a (annotated)

src/share/vm/utilities/nativeCallStack.cpp