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 
  62     /* Typically we have about ten loaded objects here. So no reason to do
  63       sort/binary search here. Linear search gives us acceptable performance.*/
  64 
  65     List objs = getLoadObjectList();
  66 
  67     for (int i = 0; i < objs.size(); i++) {
  68       LoadObject ob = (LoadObject) objs.get(i);
  69       Address base = ob.getBase();
  70       long size = ob.getSize();
  71       if ( pc.greaterThanOrEqual(base) && pc.lessThan(base.addOffsetTo(size))) {
  72         return ob;
  73       }
  74     }
  75 
  76     return null;
  77   }
  78 
  79   public CFrame topFrameForThread(ThreadProxy thread) throws DebuggerException {
  80     String cpu = dbg.getCPU();
  81     if (cpu.equals("x86")) {
  82        X86ThreadContext context = (X86ThreadContext) thread.getContext();
  83        Address ebp = context.getRegisterAsAddress(X86ThreadContext.EBP);
  84        if (ebp == null) return null;
  85        Address pc  = context.getRegisterAsAddress(X86ThreadContext.EIP);
  86        if (pc == null) return null;
  87        return new LinuxX86CFrame(dbg, ebp, pc);
  88     } else if (cpu.equals("amd64")) {
  89        AMD64ThreadContext context = (AMD64ThreadContext) thread.getContext();
  90        Address rbp = context.getRegisterAsAddress(AMD64ThreadContext.RBP);
  91        if (rbp == null) return null;
  92        Address pc  = context.getRegisterAsAddress(AMD64ThreadContext.RIP);
  93        if (pc == null) return null;
  94        return new LinuxAMD64CFrame(dbg, rbp, pc);
  95     } else if (cpu.equals("sparc")) {
  96        SPARCThreadContext context = (SPARCThreadContext) thread.getContext();
  97        Address sp = context.getRegisterAsAddress(SPARCThreadContext.R_SP);
  98        if (sp == null) return null;
  99        Address pc  = context.getRegisterAsAddress(SPARCThreadContext.R_O7);
 100        if (pc == null) return null;
 101        return new LinuxSPARCCFrame(dbg, sp, pc, LinuxDebuggerLocal.getAddressSize());
 102     } else if (cpu.equals("aarch64")) {
 103        AARCH64ThreadContext context = (AARCH64ThreadContext) thread.getContext();
 104        Address fp = context.getRegisterAsAddress(AARCH64ThreadContext.FP);
 105        if (fp == null) return null;
 106        Address pc  = context.getRegisterAsAddress(AARCH64ThreadContext.PC);
 107        if (pc == null) return null;
 108        return new LinuxAARCH64CFrame(dbg, fp, pc);
 109     } else {
 110        // Runtime exception thrown by LinuxThreadContextFactory if unknown cpu
 111        ThreadContext context = (ThreadContext) thread.getContext();
 112        return context.getTopFrame(dbg);
 113     }
 114   }
 115 
 116   public String getNameOfFile(String fileName) {
 117     return new File(fileName).getName();
 118   }
 119 
 120   public ProcessControl getProcessControl() throws DebuggerException {
 121     // FIXME: after stabs parser
 122     return null;
 123   }
 124 
 125   public boolean canDemangle() {
 126     return false;
 127   }
 128 
 129   public String demangle(String sym) {
 130     throw new UnsupportedOperationException();
 131   }
 132 }