1 /*
2 * Copyright (c) 2003, 2019, 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
31 import sun.jvm.hotspot.debugger.*;
32 import sun.jvm.hotspot.debugger.cdbg.*;
33 import sun.jvm.hotspot.debugger.x86.*;
34 import sun.jvm.hotspot.debugger.amd64.*;
35 import sun.jvm.hotspot.debugger.aarch64.*;
36 import sun.jvm.hotspot.debugger.sparc.*;
37 import sun.jvm.hotspot.debugger.ppc64.*;
38 import sun.jvm.hotspot.debugger.linux.x86.*;
39 import sun.jvm.hotspot.debugger.linux.amd64.*;
40 import sun.jvm.hotspot.debugger.linux.sparc.*;
41 import sun.jvm.hotspot.debugger.linux.ppc64.*;
42 import sun.jvm.hotspot.debugger.linux.aarch64.*;
43 import sun.jvm.hotspot.utilities.*;
44
45 class LinuxCDebugger implements CDebugger {
46 private LinuxDebugger dbg;
47
48 LinuxCDebugger(LinuxDebugger dbg) {
49 this.dbg = dbg;
50 }
51
52 public List getThreadList() throws DebuggerException {
53 return dbg.getThreadList();
54 }
55
56 public List/*<LoadObject>*/ getLoadObjectList() throws DebuggerException {
57 return dbg.getLoadObjectList();
58 }
59
60 public LoadObject loadObjectContainingPC(Address pc) throws DebuggerException {
61 if (pc == null) {
62 return null;
63 }
64
65 /* Typically we have about ten loaded objects here. So no reason to do
66 sort/binary search here. Linear search gives us acceptable performance.*/
67
68 List objs = getLoadObjectList();
69
70 for (int i = 0; i < objs.size(); i++) {
71 LoadObject ob = (LoadObject) objs.get(i);
72 Address base = ob.getBase();
73 long size = ob.getSize();
74 if ( pc.greaterThanOrEqual(base) && pc.lessThan(base.addOffsetTo(size))) {
75 return ob;
76 }
77 }
78
79 return null;
80 }
81
82 public CFrame topFrameForThread(ThreadProxy thread) throws DebuggerException {
83 String cpu = dbg.getCPU();
84 if (cpu.equals("x86")) {
85 X86ThreadContext context = (X86ThreadContext) thread.getContext();
86 Address ebp = context.getRegisterAsAddress(X86ThreadContext.EBP);
87 if (ebp == null) return null;
88 Address pc = context.getRegisterAsAddress(X86ThreadContext.EIP);
89 if (pc == null) return null;
90 return new LinuxX86CFrame(dbg, ebp, pc);
91 } else if (cpu.equals("amd64")) {
92 AMD64ThreadContext context = (AMD64ThreadContext) thread.getContext();
93 Address pc = context.getRegisterAsAddress(AMD64ThreadContext.RIP);
94 if (pc == null) return null;
95
96 long libptr = dbg.findLibPtrByAddress(pc);
97 if (libptr == 0L) { // Java frame
98 Address rbp = context.getRegisterAsAddress(AMD64ThreadContext.RBP);
99 if (rbp == null) {
100 return null;
101 }
102 return new LinuxAMD64CFrame(dbg, rbp, pc, null);
103 } else { // Native frame
104 DwarfParser dwarf;
105 try {
106 dwarf = new DwarfParser(libptr);
107 } catch (DebuggerException e) {
108 Address rbp = context.getRegisterAsAddress(AMD64ThreadContext.RBP);
109 if (rbp == null) {
110 return null;
111 }
112 return new LinuxAMD64CFrame(dbg, rbp, pc, null);
113 }
114 dwarf.processDwarf(pc);
115 Address cfa = ((dwarf.getCFARegister() == AMD64ThreadContext.RBP) &&
116 !dwarf.isBPOffsetAvailable())
117 ? context.getRegisterAsAddress(AMD64ThreadContext.RBP)
118 : context.getRegisterAsAddress(dwarf.getCFARegister())
119 .addOffsetTo(dwarf.getCFAOffset());
120 if (cfa == null) {
121 return null;
122 }
123 return new LinuxAMD64CFrame(dbg, cfa, pc, dwarf);
124 }
125 } else if (cpu.equals("sparc")) {
126 SPARCThreadContext context = (SPARCThreadContext) thread.getContext();
127 Address sp = context.getRegisterAsAddress(SPARCThreadContext.R_SP);
128 if (sp == null) return null;
129 Address pc = context.getRegisterAsAddress(SPARCThreadContext.R_O7);
130 if (pc == null) return null;
131 return new LinuxSPARCCFrame(dbg, sp, pc, LinuxDebuggerLocal.getAddressSize());
132 } else if (cpu.equals("ppc64")) {
133 PPC64ThreadContext context = (PPC64ThreadContext) thread.getContext();
134 Address sp = context.getRegisterAsAddress(PPC64ThreadContext.SP);
135 if (sp == null) return null;
136 Address pc = context.getRegisterAsAddress(PPC64ThreadContext.PC);
137 if (pc == null) return null;
138 return new LinuxPPC64CFrame(dbg, sp, pc, LinuxDebuggerLocal.getAddressSize());
139 } else if (cpu.equals("aarch64")) {
140 AARCH64ThreadContext context = (AARCH64ThreadContext) thread.getContext();
141 Address fp = context.getRegisterAsAddress(AARCH64ThreadContext.FP);
142 if (fp == null) return null;
143 Address pc = context.getRegisterAsAddress(AARCH64ThreadContext.PC);
144 if (pc == null) return null;
145 return new LinuxAARCH64CFrame(dbg, fp, pc);
146 } else {
147 // Runtime exception thrown by LinuxThreadContextFactory if unknown cpu
148 ThreadContext context = (ThreadContext) thread.getContext();
149 return context.getTopFrame(dbg);
150 }
151 }
152
153 public String getNameOfFile(String fileName) {
154 return new File(fileName).getName();
155 }
156
157 public ProcessControl getProcessControl() throws DebuggerException {
158 // FIXME: after stabs parser
159 return null;
160 }
161
162 public boolean canDemangle() {
163 return true;
164 }
165
166 public String demangle(String sym) {
167 return dbg.demangle(sym);
168 }
169 }