mcs/class/Mono.Debugger.Soft/Mono.Debugger.Soft/StackFrame.cs

   1 using System;
   2 using System.Collections.Generic;
   3 using System.Linq;
   4
   5 namespace Mono.Debugger.Soft
   6 {
   7         public class StackFrame : Mirror
   8         {
   9                 ThreadMirror thread;
  10                 MethodMirror method;
  11                 int il_offset;
  12                 Location location;
  13                 StackFrameFlags flags;
  14
  15                 /*
  16                  * FIXME: Decide on the way to request/handle debugging information:
  17                  * - request the info in bulk for all frames/on demand for individual frames
  18                  * - request the info from the runtime/request only the il offset, and compute
  19                  *   everything else based on this info using the method debug info.
  20                  */
  21
  22                 internal StackFrame (VirtualMachine vm, long id, ThreadMirror thread, MethodMirror method, int il_offset, StackFrameFlags flags) : base (vm, id) {
  23                         this.thread = thread;
  24                         this.method = method;
  25                         this.il_offset = il_offset;
  26                         this.flags = flags;
  27                 }
  28
  29                 public ThreadMirror Thread {
  30                         get {
  31                                 return thread;
  32                         }
  33                 }
  34
  35                 public MethodMirror Method {
  36                         get {
  37                                 return method;
  38                         }
  39                 }
  40
  41                 public Location Location {
  42                         get {
  43                                 if (location == null) {
  44                                         int line_number;
  45                                         string src_file = null;
  46                                         byte[] hash = null;
  47
  48                                         if (il_offset == -1)
  49                                                 line_number = -1;
  50                                         else
  51                                                 line_number = method.il_offset_to_line_number (il_offset, out src_file, out hash);
  52
  53                                         location = new Location (vm, Method, 0, il_offset, src_file != null ? src_file : method.SourceFile, line_number, 0, hash);
  54                                 }
  55                                 return location;
  56                         }
  57                 }
  58
  59                 public string FileName {
  60                         get {
  61                                 return Location.SourceFile;
  62                         }
  63             }
  64
  65                 public int ILOffset {
  66                         get {
  67                                 return Location.ILOffset;
  68                         }
  69                 }
  70
  71                 public int LineNumber {
  72                         get {
  73                                 return Location.LineNumber;
  74                         }
  75             }
  76
  77                 public bool IsDebuggerInvoke {
  78                         get {
  79                                 return (flags & StackFrameFlags.DEBUGGER_INVOKE) != 0;
  80                         }
  81                 }
  82
  83                 /*
  84                  * Whenever this frame transitions to native code. The method associated
  85                  * with the frame is either an InternalCall or a pinvoke method.
  86                  */
  87                 public bool IsNativeTransition {
  88                         get {
  89                                 return (flags & StackFrameFlags.NATIVE_TRANSITION) != 0;
  90                         }
  91                 }
  92
  93                 public Value GetValue (ParameterInfoMirror param) {
  94                         if (param == null)
  95                                 throw new ArgumentNullException ("param");
  96                         if (param.Method != Method)
  97                                 throw new ArgumentException ("Parameter doesn't belong to this frame's method.");
  98                         if (param.IsRetval)
  99                                 throw new ArgumentException ("Parameter represents the method return value.");
 100
 101                         // FIXME: Liveness
 102                         // FIXME: Allow returning the frame return value if possible
 103                         return vm.DecodeValue (vm.conn.StackFrame_GetValues (thread.Id, Id, new int [] { (- param.Position) - 1 })[0]);
 104                 }
 105
 106                 public Value GetValue (LocalVariable var) {
 107                         if (var == null)
 108                                 throw new ArgumentNullException ("var");
 109                         if (var.Method != Method)
 110                                 throw new ArgumentException ("Local variable doesn't belong to this frame's method.");
 111
 112                         // FIXME: Liveness
 113                         // FIXME: Check for return value
 114                         // FIXME: Allow returning the frame return value if possible
 115                         return vm.DecodeValue (vm.conn.StackFrame_GetValues (thread.Id, Id, new int [] { var.GetValueIndex } )[0]);
 116                 }
 117
 118                 public Value[] GetValues (LocalVariable[] vars) {
 119                         if (vars == null)
 120                                 throw new ArgumentNullException ("vars");
 121                         for (int i = 0; i < vars.Length; ++i) {
 122                                 if (vars [i] == null)
 123                                         throw new ArgumentNullException ("vars");
 124                                 if (vars [i].Method != Method)
 125                                         throw new ArgumentException ("Local variable doesn't belong to this frame's method.");
 126                         }
 127                         int[] pos = new int [vars.Length];
 128                         for (int i = 0; i < vars.Length; ++i)
 129                                 pos [i] = vars [i].GetValueIndex;
 130                         return vm.DecodeValues (vm.conn.StackFrame_GetValues (thread.Id, Id, pos));
 131                 }
 132
 133                 public Value GetArgument (int pos) {
 134                         return GetValue (Method.GetParameters () [pos]);
 135                 }
 136
 137                 public Value GetThis () {
 138                         return vm.DecodeValue (vm.conn.StackFrame_GetThis (thread.Id, Id));
 139                 }
 140
 141                 public void SetValue (LocalVariable var, Value value) {
 142                         if (var == null)
 143                                 throw new ArgumentNullException ("var");
 144                         if (var.Method != Method)
 145                                 throw new ArgumentException ("Local variable doesn't belong to this frame's method.");
 146                         if (value == null)
 147                                 throw new ArgumentNullException ("value");
 148                         CheckMirror (value);
 149                         // FIXME: Liveness
 150                         // FIXME: Check for return value
 151                         try {
 152                                 vm.conn.StackFrame_SetValues (thread.Id, Id, new int [] { var.GetValueIndex }, new ValueImpl [] { vm.EncodeValue (value) });
 153                         } catch (CommandException ex) {
 154                                 if (ex.ErrorCode == ErrorCode.INVALID_ARGUMENT)
 155                                         throw new ArgumentException ("Value does not match the type of the local variable.");
 156                                 else
 157                                         throw;
 158                         }
 159                 }
 160
 161                 public void SetValue (ParameterInfoMirror param, Value value) {
 162                         if (param == null)
 163                                 throw new ArgumentNullException ("param");
 164                         if (param.Method != Method)
 165                                 throw new ArgumentException ("Parameter doesn't belong to this frame's method.");
 166                         if (param.IsRetval)
 167                                 throw new ArgumentException ("Parameter represents the method return value.");
 168                         if (value == null)
 169                                 throw new ArgumentNullException ("value");
 170                         CheckMirror (value);
 171
 172                         // FIXME: Liveness
 173                         // FIXME: Allow setting the frame return value if possible
 174                         try {
 175                                 vm.conn.StackFrame_SetValues (thread.Id, Id, new int [] { (- param.Position) - 1 }, new ValueImpl [] { vm.EncodeValue (value) });
 176                         } catch (CommandException ex) {
 177                                 if (ex.ErrorCode == ErrorCode.INVALID_ARGUMENT)
 178                                         throw new ArgumentException ("Value does not match the type of the variable.");
 179                                 else
 180                                         throw;
 181                         }
 182                 }
 183
 184                 public IList<LocalVariable> GetVisibleVariables () {
 185                         if (Location.ILOffset == -1)
 186                                 throw new AbsentInformationException ();
 187
 188                         return Method.GetLocals ().Where (l => l.LiveRangeStart <= location.ILOffset && l.LiveRangeEnd >= location.ILOffset).ToList ();
 189                 }
 190
 191                 public LocalVariable GetVisibleVariableByName (string name) {
 192                         if (name == null)
 193                                 throw new ArgumentNullException ("name");
 194
 195                         if (Location.ILOffset == -1)
 196                                 throw new AbsentInformationException ();
 197
 198                         return Method.GetLocals ().Where (l => l.LiveRangeStart <= location.ILOffset && l.LiveRangeEnd >= location.ILOffset && l.Name == name).FirstOrDefault ();
 199                 }
 200     }
 201 }