Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/share/vm/utilities/nativeCallStack.cpp
src/share/vm/utilities/nativeCallStack.cpp
- changeset 7074
- 833b0f92429a
- child 7078
- c6211b707068
equal
deleted
inserted
replaced
| 7073:4d3a43351904 | 7074:833b0f92429a |
|---|---|
| 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 */ | |
| 24 | |
| 25 #include "precompiled.hpp" | |
| 26 #include "runtime/os.hpp" | |
| 27 #include "utilities/globalDefinitions.hpp" | |
| 28 #include "utilities/nativeCallStack.hpp" | |
| 29 | |
| 30 | |
| 31 NativeCallStack::NativeCallStack(int toSkip, bool fillStack) : | |
| 32 _hash_value(0) { | |
| 33 | |
| 34 #if !PLATFORM_NATIVE_STACK_WALKING_SUPPORTED | |
| 35 fillStack = false; | |
| 36 #endif | |
| 37 | |
| 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 } | |
| 46 | |
| 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 } | |
| 58 | |
| 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 } | |
| 69 | |
| 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 } | |
| 81 | |
| 82 NativeCallStack* p = const_cast<NativeCallStack*>(this); | |
| 83 p->_hash_value = (int)(hash_val & 0xFFFFFFFF); | |
| 84 } | |
| 85 return _hash_value; | |
| 86 } | |
| 87 | |
| 88 void NativeCallStack::print_on(outputStream* out) const { | |
| 89 print_on(out, 0); | |
| 90 } | |
| 91 | |
| 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 } | |
| 118 |
