1 /*
2 * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2015, Red Hat Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 package sun.jvm.hotspot.debugger.linux;
27
28 import java.io.*;
29 import java.util.*;
30 import sun.jvm.hotspot.debugger.*;
31 import sun.jvm.hotspot.debugger.cdbg.*;
32 import sun.jvm.hotspot.debugger.x86.*;
33 import sun.jvm.hotspot.debugger.amd64.*;
34 import sun.jvm.hotspot.debugger.sparc.*;
35 import sun.jvm.hotspot.debugger.linux.x86.*;
36 import sun.jvm.hotspot.debugger.linux.amd64.*;
37 import sun.jvm.hotspot.debugger.aarch64.*;
38 import sun.jvm.hotspot.debugger.linux.aarch64.*;
39 import sun.jvm.hotspot.debugger.linux.sparc.*;
40 import sun.jvm.hotspot.utilities.*;
41
42 class LinuxCDebugger implements CDebugger {
43 private LinuxDebugger dbg;
44
45 LinuxCDebugger(LinuxDebugger dbg) {
46 this.dbg = dbg;
47 }
48
49 public List getThreadList() throws DebuggerException {
50 return dbg.getThreadList();
51 }
52
53 public List/*<LoadObject>*/ getLoadObjectList() throws DebuggerException {
54 return dbg.getLoadObjectList();
55 }
56
57 public LoadObject loadObjectContainingPC(Address pc) throws DebuggerException {
58 if (pc == null) {
59 return null;
60 }
61 List objs = getLoadObjectList();
62 Object[] arr = objs.toArray();
63 // load objects are sorted by base address, do binary search
64 int mid = -1;
65 int low = 0;
66 int high = arr.length - 1;
67
68 while (low <= high) {
69 mid = (low + high) >> 1;
70 LoadObject midVal = (LoadObject) arr[mid];
71 long cmp = pc.minus(midVal.getBase());
72 if (cmp < 0) {
73 high = mid - 1;
74 } else if (cmp > 0) {
75 long size = midVal.getSize();
76 if (cmp >= size) {
77 low = mid + 1;
78 } else {
79 return (LoadObject) arr[mid];
80 }
81 } else { // match found
82 return (LoadObject) arr[mid];
83 }
84 }
85 // no match found.
86 return null;
87 }
88
89 public CFrame topFrameForThread(ThreadProxy thread) throws DebuggerException {
90 String cpu = dbg.getCPU();
91 if (cpu.equals("x86")) {
92 X86ThreadContext context = (X86ThreadContext) thread.getContext();
93 Address ebp = context.getRegisterAsAddress(X86ThreadContext.EBP);
94 if (ebp == null) return null;
95 Address pc = context.getRegisterAsAddress(X86ThreadContext.EIP);
96 if (pc == null) return null;
97 return new LinuxX86CFrame(dbg, ebp, pc);
98 } else if (cpu.equals("amd64")) {
99 AMD64ThreadContext context = (AMD64ThreadContext) thread.getContext();
100 Address rbp = context.getRegisterAsAddress(AMD64ThreadContext.RBP);
101 if (rbp == null) return null;
102 Address pc = context.getRegisterAsAddress(AMD64ThreadContext.RIP);
103 if (pc == null) return null;
104 return new LinuxAMD64CFrame(dbg, rbp, pc);
105 } else if (cpu.equals("sparc")) {
106 SPARCThreadContext context = (SPARCThreadContext) thread.getContext();
107 Address sp = context.getRegisterAsAddress(SPARCThreadContext.R_SP);
108 if (sp == null) return null;
109 Address pc = context.getRegisterAsAddress(SPARCThreadContext.R_O7);
110 if (pc == null) return null;
111 return new LinuxSPARCCFrame(dbg, sp, pc, LinuxDebuggerLocal.getAddressSize());
112 } else if (cpu.equals("aarch64")) {
113 AARCH64ThreadContext context = (AARCH64ThreadContext) thread.getContext();
114 Address fp = context.getRegisterAsAddress(AARCH64ThreadContext.FP);
115 if (fp == null) return null;
116 Address pc = context.getRegisterAsAddress(AARCH64ThreadContext.PC);
117 if (pc == null) return null;
118 return new LinuxAARCH64CFrame(dbg, fp, pc);
119 } else {
120 // Runtime exception thrown by LinuxThreadContextFactory if unknown cpu
121 ThreadContext context = (ThreadContext) thread.getContext();
122 return context.getTopFrame(dbg);
123 }
124 }
125
126 public String getNameOfFile(String fileName) {
127 return new File(fileName).getName();
128 }
129
130 public ProcessControl getProcessControl() throws DebuggerException {
131 // FIXME: after stabs parser
132 return null;
133 }
134
135 public boolean canDemangle() {
136 return false;
137 }
138
139 public String demangle(String sym) {
140 throw new UnsupportedOperationException();
141 }
142 }