1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/utilities/nativeCallStack.cpp Wed Aug 27 08:19:12 2014 -0400
1.3 @@ -0,0 +1,118 @@
1.4 +/*
1.5 + * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#include "precompiled.hpp"
1.29 +#include "runtime/os.hpp"
1.30 +#include "utilities/globalDefinitions.hpp"
1.31 +#include "utilities/nativeCallStack.hpp"
1.32 +
1.33 +
1.34 +NativeCallStack::NativeCallStack(int toSkip, bool fillStack) :
1.35 + _hash_value(0) {
1.36 +
1.37 +#if !PLATFORM_NATIVE_STACK_WALKING_SUPPORTED
1.38 + fillStack = false;
1.39 +#endif
1.40 +
1.41 + if (fillStack) {
1.42 + os::get_native_stack(_stack, NMT_TrackingStackDepth, toSkip);
1.43 + } else {
1.44 + for (int index = 0; index < NMT_TrackingStackDepth; index ++) {
1.45 + _stack[index] = NULL;
1.46 + }
1.47 + }
1.48 +}
1.49 +
1.50 +NativeCallStack::NativeCallStack(address* pc, int frameCount) {
1.51 + int frameToCopy = (frameCount < NMT_TrackingStackDepth) ?
1.52 + frameCount : NMT_TrackingStackDepth;
1.53 + int index;
1.54 + for (index = 0; index < frameToCopy; index ++) {
1.55 + _stack[index] = pc[index];
1.56 + }
1.57 + for (; index < NMT_TrackingStackDepth; index ++) {
1.58 + _stack[index] = NULL;
1.59 + }
1.60 +}
1.61 +
1.62 +// number of stack frames captured
1.63 +int NativeCallStack::frames() const {
1.64 + int index;
1.65 + for (index = 0; index < NMT_TrackingStackDepth; index ++) {
1.66 + if (_stack[index] == NULL) {
1.67 + break;
1.68 + }
1.69 + }
1.70 + return index;
1.71 +}
1.72 +
1.73 +// Hash code. Any better algorithm?
1.74 +int NativeCallStack::hash() const {
1.75 + long hash_val = _hash_value;
1.76 + if (hash_val == 0) {
1.77 + long pc;
1.78 + int index;
1.79 + for (index = 0; index < NMT_TrackingStackDepth; index ++) {
1.80 + pc = (long)_stack[index];
1.81 + if (pc == 0) break;
1.82 + hash_val += pc;
1.83 + }
1.84 +
1.85 + NativeCallStack* p = const_cast<NativeCallStack*>(this);
1.86 + p->_hash_value = (int)(hash_val & 0xFFFFFFFF);
1.87 + }
1.88 + return _hash_value;
1.89 +}
1.90 +
1.91 +void NativeCallStack::print_on(outputStream* out) const {
1.92 + print_on(out, 0);
1.93 +}
1.94 +
1.95 +// Decode and print this call path
1.96 +void NativeCallStack::print_on(outputStream* out, int indent) const {
1.97 + address pc;
1.98 + char buf[1024];
1.99 + int offset;
1.100 + if (is_empty()) {
1.101 + for (int index = 0; index < indent; index ++) out->print(" ");
1.102 +#if PLATFORM_NATIVE_STACK_WALKING_SUPPORTED
1.103 + out->print("[BOOTSTRAP]");
1.104 +#else
1.105 + out->print("[No stack]");
1.106 +#endif
1.107 + } else {
1.108 + for (int frame = 0; frame < NMT_TrackingStackDepth; frame ++) {
1.109 + pc = get_frame(frame);
1.110 + if (pc == NULL) break;
1.111 + // Print indent
1.112 + for (int index = 0; index < indent; index ++) out->print(" ");
1.113 + if (os::dll_address_to_function_name(pc, buf, sizeof(buf), &offset)) {
1.114 + out->print_cr("[" PTR_FORMAT "] %s+0x%x", p2i(pc), buf, offset);
1.115 + } else {
1.116 + out->print_cr("[" PTR_FORMAT "]", p2i(pc));
1.117 + }
1.118 + }
1.119 + }
1.120 +}
1.121 +
