1 /*
2 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
3 *
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * The contents of this file are subject to the terms of either the Universal Permissive License
7 * v 1.0 as shown at http://oss.oracle.com/licenses/upl
8 *
9 * or the following license:
10 *
11 * Redistribution and use in source and binary forms, with or without modification, are permitted
12 * provided that the following conditions are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright notice, this list of conditions
15 * and the following disclaimer.
16 *
17 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
18 * conditions and the following disclaimer in the documentation and/or other materials provided with
19 * the distribution.
20 *
21 * 3. Neither the name of the copyright holder nor the names of its contributors may be used to
22 * endorse or promote products derived from this software without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
26 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
27 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
31 * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33 package org.openjdk.jmc.agent.test.util;
34
35 import java.io.BufferedReader;
36 import java.io.ByteArrayInputStream;
37 import java.io.Closeable;
38 import java.io.EOFException;
39 import java.io.IOException;
40 import java.io.InputStream;
41 import java.io.InputStreamReader;
42 import java.util.Arrays;
43 import java.util.Random;
44
45 import org.openjdk.jmc.agent.test.InstrumentMe;
46
47 public final class TestToolkit {
48 public static final Random RND = new Random();
49
50 private TestToolkit() {
51 throw new UnsupportedOperationException("Not to be instantiated."); //$NON-NLS-1$
52 }
53
54 public static byte[] getByteCode(Class<?> c) throws IOException {
55 InputStream is = c.getClassLoader().getResourceAsStream(c.getName().replace('.', '/') + ".class"); //$NON-NLS-1$
56 return readFully(is, -1, true);
57 }
58
59 public static byte[] readFully(InputStream is, int length, boolean readAll) throws IOException {
60 byte[] output = {};
61 if (length == -1) {
62 length = Integer.MAX_VALUE;
63 }
64 int pos = 0;
65 while (pos < length) {
66 int bytesToRead;
67 if (pos >= output.length) { // Only expand when there's no room
68 bytesToRead = Math.min(length - pos, output.length + 1024);
69 if (output.length < pos + bytesToRead) {
70 output = Arrays.copyOf(output, pos + bytesToRead);
71 }
72 } else {
73 bytesToRead = output.length - pos;
74 }
75 int cc = is.read(output, pos, bytesToRead);
76 if (cc < 0) {
77 if (readAll && length != Integer.MAX_VALUE) {
78 throw new EOFException("Detect premature EOF"); //$NON-NLS-1$
79 } else {
80 if (output.length != pos) {
81 output = Arrays.copyOf(output, pos);
82 }
83 break;
84 }
85 }
86 pos += cc;
87 }
88 return output;
89 }
90
91 public static long randomLong() {
92 return RND.nextLong();
93 }
94
95 public static String randomString() {
96 StringBuilder builder = new StringBuilder();
97 for (int i = 0; i < RND.nextInt(10) + 1; i++) {
98 builder.append(Character.toString((char) (RND.nextInt(26) + 64)));
99 }
100 return builder.toString();
101 }
102
103 public static InputStream getProbesXML(String testName) {
104 try {
105 String s = readTemplate();
106 s = s.replaceAll("%TEST_NAME%", testName); //$NON-NLS-1$
107 return new ByteArrayInputStream(s.getBytes());
108
109 } catch (IOException e) {
110 e.printStackTrace();
111 }
112 return null;
113 }
114
115 private static String readTemplate() throws IOException {
116 InputStream inputStream = InstrumentMe.class.getResourceAsStream("jfrprobes_template.xml"); //$NON-NLS-1$
117 String s = readString(inputStream);
118 closeSilently(inputStream);
119 return s;
120 }
121
122 public static String readString(InputStream in) throws IOException {
123 return readString(new BufferedReader(new InputStreamReader(in), 8192));
124 }
125
126 public static String readString(InputStream in, String charsetName) throws IOException {
127 return readString(new BufferedReader(new InputStreamReader(in, charsetName), 8192));
128 }
129
130 private static String readString(BufferedReader reader) throws IOException {
131 String s;
132 StringBuilder builder = new StringBuilder();
133 try {
134 while ((s = reader.readLine()) != null) {
135 builder.append(s + "\r"); //$NON-NLS-1$
136 }
137 s = builder.toString();
138 } finally {
139 closeSilently(reader);
140 }
141 return s;
142 }
143
144 private static void closeSilently(Closeable closeable) {
145 if (closeable != null) {
146 try {
147 closeable.close();
148 } catch (Throwable t) {
149
150 }
151 }
152 }
153 }