Mercurial > hg > graal-jvmci-8
comparison src/share/vm/utilities/nativeCallStack.cpp @ 20360:833b0f92429a
8046598: Scalable Native memory tracking development
Summary: Enhance scalability of native memory tracking
Reviewed-by: coleenp, ctornqvi, gtriantafill
author | zgu |
---|---|
date | Wed, 27 Aug 2014 08:19:12 -0400 |
parents | |
children | c6211b707068 |
comparison
equal
deleted
inserted
replaced
20359:4d3a43351904 | 20360:833b0f92429a |
---|---|
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 |