1 /*
2 * Copyright (c) 2003, 2021, 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.ppc64.*;
37 import sun.jvm.hotspot.debugger.linux.x86.*;
38 import sun.jvm.hotspot.debugger.linux.amd64.*;
39 import sun.jvm.hotspot.debugger.linux.ppc64.*;
40 import sun.jvm.hotspot.debugger.linux.aarch64.*;
41 import sun.jvm.hotspot.utilities.*;
42
43 class LinuxCDebugger implements CDebugger {
44 private LinuxDebugger dbg;
45
46 LinuxCDebugger(LinuxDebugger dbg) {
47 this.dbg = dbg;
48 }
49
50 public List<ThreadProxy> getThreadList() throws DebuggerException {
51 return dbg.getThreadList();
52 }
53
54 public List<LoadObject> getLoadObjectList() throws DebuggerException {
55 return dbg.getLoadObjectList();
56 }
57
58 public LoadObject loadObjectContainingPC(Address pc) throws DebuggerException {
59 if (pc == null) {
60 return null;
61 }
62
63 /* Typically we have about ten loaded objects here. So no reason to do
64 sort/binary search here. Linear search gives us acceptable performance.*/
65
66 List<LoadObject> objs = getLoadObjectList();
67
68 for (int i = 0; i < objs.size(); i++) {
69 LoadObject ob = (LoadObject) objs.get(i);
70 Address base = ob.getBase();
71 long size = ob.getSize();
72 if (pc.greaterThanOrEqual(base) && pc.lessThan(base.addOffsetTo(size))) {
73 return ob;
74 }
75 }
76
77 return null;
78 }
79
80 public CFrame topFrameForThread(ThreadProxy thread) throws DebuggerException {
81 String cpu = dbg.getCPU();
82 if (cpu.equals("x86")) {
83 X86ThreadContext context = (X86ThreadContext) thread.getContext();
84 Address ebp = context.getRegisterAsAddress(X86ThreadContext.EBP);
85 if (ebp == null) return null;
86 Address pc = context.getRegisterAsAddress(X86ThreadContext.EIP);
87 if (pc == null) return null;
88 return new LinuxX86CFrame(dbg, ebp, pc);
89 } else if (cpu.equals("amd64")) {
90 AMD64ThreadContext context = (AMD64ThreadContext) thread.getContext();
91 Address pc = context.getRegisterAsAddress(AMD64ThreadContext.RIP);
92 if (pc == null) return null;
93 return LinuxAMD64CFrame.getTopFrame(dbg, pc, context);
94 } else if (cpu.equals("ppc64")) {
95 PPC64ThreadContext context = (PPC64ThreadContext) thread.getContext();
96 Address sp = context.getRegisterAsAddress(PPC64ThreadContext.SP);
97 if (sp == null) return null;
98 Address pc = context.getRegisterAsAddress(PPC64ThreadContext.PC);
99 if (pc == null) return null;
100 return new LinuxPPC64CFrame(dbg, sp, pc, LinuxDebuggerLocal.getAddressSize());
101 } else if (cpu.equals("aarch64")) {
102 AARCH64ThreadContext context = (AARCH64ThreadContext) thread.getContext();
103 Address fp = context.getRegisterAsAddress(AARCH64ThreadContext.FP);
104 if (fp == null) return null;
105 Address pc = context.getRegisterAsAddress(AARCH64ThreadContext.PC);
106 if (pc == null) return null;
107 return new LinuxAARCH64CFrame(dbg, fp, pc);
108 } else {
109 // Runtime exception thrown by LinuxThreadContextFactory if unknown cpu
110 ThreadContext context = (ThreadContext) thread.getContext();
111 return context.getTopFrame(dbg);
112 }
113 }
114
115 public String getNameOfFile(String fileName) {
116 return new File(fileName).getName();
117 }
118
119 public ProcessControl getProcessControl() throws DebuggerException {
120 // FIXME: after stabs parser
121 return null;
122 }
123
124 public boolean canDemangle() {
125 return true;
126 }
127
128 public String demangle(String sym) {
129 return dbg.demangle(sym);
130 }
131 }