1 /*
2 * Copyright (c) 2002, 2020, 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 package sun.jvm.hotspot.asm;
26
27 import java.io.PrintStream;
28 import sun.jvm.hotspot.code.CodeBlob;
29 import sun.jvm.hotspot.code.NMethod;
30 import sun.jvm.hotspot.debugger.Address;
31 import sun.jvm.hotspot.runtime.VM;
32
33 public class Disassembler {
34 private static String options = "";
35 private static long decode_function;
36
37 protected long startPc;
38 protected byte[] code;
39 private CodeBlob blob;
40 private NMethod nmethod;
41
42 public static void decode(InstructionVisitor visitor, CodeBlob blob) {
43 decode(visitor, blob, blob.codeBegin(), blob.codeEnd());
44 }
45
46 public static void decode(InstructionVisitor visitor, CodeBlob blob, Address begin, Address end) {
47 int codeSize = (int)end.minus(begin);
48 long startPc = VM.getAddressValue(begin);
49 byte[] code = new byte[codeSize];
50 for (int i = 0; i < code.length; i++)
51 code[i] = begin.getJByteAt(i);
52 Disassembler dis = new Disassembler(startPc, code);
53 dis.decode(visitor);
54 }
55
56 private Disassembler(long startPc, byte[] code) {
57 this.startPc = startPc;
58 this.code = code;
59
60 // Lazily load hsdis
61 if (decode_function == 0) {
62 StringBuilder path = new StringBuilder(System.getProperty("java.home"));
63 String sep = System.getProperty("file.separator");
64 String os = System.getProperty("os.name");
65 String libname = "hsdis";
66 String arch = System.getProperty("os.arch");
67 if (os.lastIndexOf("Windows", 0) != -1) {
68 if (arch.equals("x86")) {
69 libname += "-i386";
70 } else if (arch.equals("amd64")) {
71 libname += "-amd64";
72 } else {
73 libname += "-" + arch;
74 }
75 path.append(sep + "bin" + sep);
76 libname += ".dll";
77 } else if (os.lastIndexOf("Linux", 0) != -1) {
78 if (arch.equals("x86") || arch.equals("i386")) {
79 path.append(sep + "lib" + sep + "i386" + sep);
80 libname += "-i386.so";
81 } else if (arch.equals("amd64") || arch.equals("x86_64")) {
82 path.append(sep + "lib" + sep + "amd64" + sep);
83 libname += "-amd64.so";
84 } else {
85 path.append(sep + "lib" + sep + arch + sep);
86 libname += "-" + arch + ".so";
87 }
88 } else if (os.lastIndexOf("Mac OS X", 0) != -1) {
89 path.append(sep + "lib" + sep);
90 libname += "-amd64" + ".dylib"; // x86_64 => amd64
91 } else {
92 path.append(sep + "lib" + sep + "arch" + sep);
93 libname += "-" + arch + ".so";
94 }
95 decode_function = load_library(path.toString(), libname);
96 }
97 }
98
99 private static native long load_library(String installed_jrepath, String hsdis_library_name);
100
101 private native void decode(InstructionVisitor visitor, long pc, byte[] code,
102 String options, long decode_function);
103
104 private void decode(InstructionVisitor visitor) {
105 visitor.prologue();
106 decode(visitor, startPc, code, options, decode_function);
107 visitor.epilogue();
108 }
109
110 private boolean match(String event, String tag) {
111 if (!event.startsWith(tag))
112 return false;
113 int taglen = tag.length();
114 if (taglen == event.length()) return true;
115 char delim = event.charAt(taglen);
116 return delim == ' ' || delim == '/' || delim == '=';
117 }
118
119 // This is called from the native code to process various markers
120 // in the dissassembly.
121 private long handleEvent(InstructionVisitor visitor, String event, long arg) {
122 if (match(event, "insn")) {
123 try {
124 visitor.beginInstruction(arg);
125 } catch (Throwable e) {
126 e.printStackTrace();
127 }
128 } else if (match(event, "/insn")) {
129 try {
130 visitor.endInstruction(arg);
131 } catch (Throwable e) {
132 e.printStackTrace();
133 }
134 } else if (match(event, "addr")) {
135 if (arg != 0) {
136 visitor.printAddress(arg);
137 }
138 return arg;
139 } else if (match(event, "mach")) {
140 // output().printf("[Disassembling for mach='%s']\n", arg);
141 } else {
142 // ignore unrecognized markup
143 }
144 return 0;
145 }
146
147 // This called from the native code to perform printing
148 private void rawPrint(InstructionVisitor visitor, String s) {
149 visitor.print(s);
150 }
151 }