1 /*
   2  * Copyright (c) 2003, 2006, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores,
  20  * CA 94065 USA or visit www.oracle.com if you need additional information or
  21  * have any questions.
  22  *
  23  */
  24 
  25 package sun.jvm.hotspot.debugger.linux;
  26 
  27 import java.io.*;
  28 import java.util.*;
  29 import sun.jvm.hotspot.debugger.*;
  30 import sun.jvm.hotspot.debugger.cdbg.*;
  31 import sun.jvm.hotspot.debugger.x86.*;
  32 import sun.jvm.hotspot.debugger.amd64.*;
  33 import sun.jvm.hotspot.debugger.sparc.*;
  34 import sun.jvm.hotspot.debugger.linux.x86.*;
  35 import sun.jvm.hotspot.debugger.linux.amd64.*;
  36 import sun.jvm.hotspot.debugger.linux.sparc.*;
  37 import sun.jvm.hotspot.utilities.*;
  38 
  39 class LinuxCDebugger implements CDebugger {
  40   private LinuxDebugger dbg;
  41 
  42   LinuxCDebugger(LinuxDebugger dbg) {
  43     this.dbg = dbg;
  44   }
  45 
  46   public List getThreadList() throws DebuggerException {
  47     return dbg.getThreadList();
  48   }
  49 
  50   public List/*<LoadObject>*/ getLoadObjectList() throws DebuggerException {
  51     return dbg.getLoadObjectList();
  52   }
  53 
  54   public LoadObject loadObjectContainingPC(Address pc) throws DebuggerException {
  55     if (pc == null) {
  56       return null;
  57     }
  58     List objs = getLoadObjectList();
  59     Object[] arr = objs.toArray();
  60     // load objects are sorted by base address, do binary search
  61     int mid  = -1;
  62     int low  = 0;
  63     int high = arr.length - 1;
  64 
  65     while (low <= high) {
  66        mid = (low + high) >> 1;
  67        LoadObject midVal = (LoadObject) arr[mid];
  68        long cmp = pc.minus(midVal.getBase());
  69        if (cmp < 0) {
  70           high = mid - 1;
  71        } else if (cmp > 0) {
  72           long size = midVal.getSize();
  73           if (cmp >= size) {
  74              low = mid + 1;
  75           } else {
  76              return (LoadObject) arr[mid];
  77           }
  78        } else { // match found
  79           return (LoadObject) arr[mid];
  80        }
  81     }
  82     // no match found.
  83     return null;
  84   }
  85 
  86   public CFrame topFrameForThread(ThreadProxy thread) throws DebuggerException {
  87     String cpu = dbg.getCPU();
  88     if (cpu.equals("x86")) {
  89        X86ThreadContext context = (X86ThreadContext) thread.getContext();
  90        Address ebp = context.getRegisterAsAddress(X86ThreadContext.EBP);
  91        if (ebp == null) return null;
  92        Address pc  = context.getRegisterAsAddress(X86ThreadContext.EIP);
  93        if (pc == null) return null;
  94        return new LinuxX86CFrame(dbg, ebp, pc);
  95     } else if (cpu.equals("amd64")) {
  96        AMD64ThreadContext context = (AMD64ThreadContext) thread.getContext();
  97        Address rbp = context.getRegisterAsAddress(AMD64ThreadContext.RBP);
  98        if (rbp == null) return null;
  99        Address pc  = context.getRegisterAsAddress(AMD64ThreadContext.RIP);
 100        if (pc == null) return null;
 101        return new LinuxAMD64CFrame(dbg, rbp, pc);
 102     } else if (cpu.equals("sparc")) {
 103        SPARCThreadContext context = (SPARCThreadContext) thread.getContext();
 104        Address sp = context.getRegisterAsAddress(SPARCThreadContext.R_SP);
 105        if (sp == null) return null;
 106        Address pc  = context.getRegisterAsAddress(SPARCThreadContext.R_O7);
 107        if (pc == null) return null;
 108        return new LinuxSPARCCFrame(dbg, sp, pc, LinuxDebuggerLocal.getAddressSize());
 109     } else {
 110        throw new DebuggerException(cpu + " is not yet supported");
 111     }
 112   }
 113 
 114   public String getNameOfFile(String fileName) {
 115     return new File(fileName).getName();
 116   }
 117 
 118   public ProcessControl getProcessControl() throws DebuggerException {
 119     // FIXME: after stabs parser
 120     return null;
 121   }
 122 
 123   public boolean canDemangle() {
 124     return false;
 125   }
 126 
 127   public String demangle(String sym) {
 128     throw new UnsupportedOperationException();
 129   }
 130 }