tools/pdb2mdb/PdbScope.cs

   1 //-----------------------------------------------------------------------------
   2 //
   3 // Copyright (C) Microsoft Corporation.  All Rights Reserved.
   4 //
   5 //-----------------------------------------------------------------------------
   6 using System;
   7
   8 namespace Microsoft.Cci.Pdb {
   9   internal class PdbScope {
  10     internal PdbConstant[] constants;
  11     internal PdbSlot[] slots;
  12     internal PdbScope[] scopes;
  13     internal string[] usedNamespaces;
  14
  15     internal uint segment;
  16     internal uint address;
  17     internal uint length;
  18
  19     internal PdbScope(BlockSym32 block, BitAccess bits, out uint typind) {
  20       this.segment = block.seg;
  21       this.address = block.off;
  22       this.length = block.len;
  23       typind = 0;
  24
  25       int constantCount;
  26       int scopeCount;
  27       int slotCount;
  28       int namespaceCount;
  29       PdbFunction.CountScopesAndSlots(bits, block.end, out constantCount, out scopeCount, out slotCount, out namespaceCount);
  30       constants = new PdbConstant[constantCount];
  31       scopes = new PdbScope[scopeCount];
  32       slots = new PdbSlot[slotCount];
  33       usedNamespaces = new string[namespaceCount];
  34       int constant = 0;
  35       int scope = 0;
  36       int slot = 0;
  37       int usedNs = 0;
  38
  39       while (bits.Position < block.end) {
  40         ushort siz;
  41         ushort rec;
  42
  43         bits.ReadUInt16(out siz);
  44         int star = bits.Position;
  45         int stop = bits.Position + siz;
  46         bits.Position = star;
  47         bits.ReadUInt16(out rec);
  48
  49         switch ((SYM)rec) {
  50           case SYM.S_BLOCK32: {
  51               BlockSym32 sub = new BlockSym32();
  52
  53               bits.ReadUInt32(out sub.parent);
  54               bits.ReadUInt32(out sub.end);
  55               bits.ReadUInt32(out sub.len);
  56               bits.ReadUInt32(out sub.off);
  57               bits.ReadUInt16(out sub.seg);
  58               bits.SkipCString(out sub.name);
  59
  60               bits.Position = stop;
  61               scopes[scope++] = new PdbScope(sub, bits, out typind);
  62               break;
  63             }
  64
  65           case SYM.S_MANSLOT:
  66             slots[slot++] = new PdbSlot(bits, out typind);
  67             bits.Position = stop;
  68             break;
  69
  70           case SYM.S_UNAMESPACE:
  71             bits.ReadCString(out usedNamespaces[usedNs++]);
  72             bits.Position = stop;
  73             break;
  74
  75           case SYM.S_END:
  76             bits.Position = stop;
  77             break;
  78
  79           case SYM.S_MANCONSTANT:
  80             constants[constant++] = new PdbConstant(bits);
  81             bits.Position = stop;
  82             break;
  83
  84           default:
  85             throw new PdbException("Unknown SYM in scope {0}", (SYM)rec);
  86           // bits.Position = stop;
  87         }
  88       }
  89
  90       if (bits.Position != block.end) {
  91         throw new Exception("Not at S_END");
  92       }
  93
  94       ushort esiz;
  95       ushort erec;
  96       bits.ReadUInt16(out esiz);
  97       bits.ReadUInt16(out erec);
  98
  99       if (erec != (ushort)SYM.S_END) {
 100         throw new Exception("Missing S_END");
 101       }
 102     }
 103   }
 104 }