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.riscv64.*;
 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.ppc64.*;
 41 import sun.jvm.hotspot.debugger.linux.aarch64.*;
 42 import sun.jvm.hotspot.debugger.linux.riscv64.*;
 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<ThreadProxy> 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<LoadObject> 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        return LinuxAMD64CFrame.getTopFrame(dbg, pc, context);
 96     }  else if (cpu.equals("ppc64")) {
 97         PPC64ThreadContext context = (PPC64ThreadContext) thread.getContext();
 98         Address sp = context.getRegisterAsAddress(PPC64ThreadContext.SP);
 99         if (sp == null) return null;
100         Address pc  = context.getRegisterAsAddress(PPC64ThreadContext.PC);
101         if (pc == null) return null;
102         return new LinuxPPC64CFrame(dbg, sp, pc, LinuxDebuggerLocal.getAddressSize());
103     } else if (cpu.equals("aarch64")) {
104        AARCH64ThreadContext context = (AARCH64ThreadContext) thread.getContext();
105        Address fp = context.getRegisterAsAddress(AARCH64ThreadContext.FP);
106        if (fp == null) return null;
107        Address pc  = context.getRegisterAsAddress(AARCH64ThreadContext.PC);
108        if (pc == null) return null;
109        return new LinuxAARCH64CFrame(dbg, fp, pc);
110     } else if (cpu.equals("riscv64")) {
111        RISCV64ThreadContext context = (RISCV64ThreadContext) thread.getContext();
112        Address fp = context.getRegisterAsAddress(RISCV64ThreadContext.FP);
113        if (fp == null) return null;
114        Address pc  = context.getRegisterAsAddress(RISCV64ThreadContext.PC);
115        if (pc == null) return null;
116        return new LinuxRISCV64CFrame(dbg, fp, pc);
117     } else {
118        // Runtime exception thrown by LinuxThreadContextFactory if unknown cpu
119        ThreadContext context = (ThreadContext) thread.getContext();
120        return context.getTopFrame(dbg);
121     }
122   }
123 
124   public String getNameOfFile(String fileName) {
125     return new File(fileName).getName();
126   }
127 
128   public ProcessControl getProcessControl() throws DebuggerException {
129     // FIXME: after stabs parser
130     return null;
131   }
132 
133   public boolean canDemangle() {
134     return true;
135   }
136 
137   public String demangle(String sym) {
138     return dbg.demangle(sym);
139   }
140 }