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                                         int column_number = 0;
  48
  49                                         if (il_offset == -1)
  50                                                 line_number = -1;
  51                                         else
  52                                                 line_number = method.il_offset_to_line_number (il_offset, out src_file, out hash, out column_number);
  53
  54                                         location = new Location (vm, Method, 0, il_offset, src_file != null ? src_file : method.SourceFile, line_number, column_number, hash);
  55                                 }
  56                                 return location;
  57                         }
  58                 }
  59
  60                 public string FileName {
  61                         get {
  62                                 return Location.SourceFile;
  63                         }
  64             }
  65
  66                 public int ILOffset {
  67                         get {
  68                                 return Location.ILOffset;
  69                         }
  70                 }
  71
  72                 public int LineNumber {
  73                         get {
  74                                 return Location.LineNumber;
  75                         }
  76             }
  77
  78                 public bool IsDebuggerInvoke {
  79                         get {
  80                                 return (flags & StackFrameFlags.DEBUGGER_INVOKE) != 0;
  81                         }
  82                 }
  83
  84                 /*
  85                  * Whenever this frame transitions to native code. The method associated
  86                  * with the frame is either an InternalCall or a pinvoke method.
  87                  */
  88                 public bool IsNativeTransition {
  89                         get {
  90                                 return (flags & StackFrameFlags.NATIVE_TRANSITION) != 0;
  91                         }
  92                 }
  93
  94                 public Value GetValue (ParameterInfoMirror param) {
  95                         if (param == null)
  96                                 throw new ArgumentNullException ("param");
  97                         if (param.Method != Method)
  98                                 throw new ArgumentException ("Parameter doesn't belong to this frame's method.");
  99                         if (param.IsRetval)
 100                                 throw new ArgumentException ("Parameter represents the method return value.");
 101
 102                         // FIXME: Liveness
 103                         // FIXME: Allow returning the frame return value if possible
 104                         return vm.DecodeValue (vm.conn.StackFrame_GetValues (thread.Id, Id, new int [] { (- param.Position) - 1 })[0]);
 105                 }
 106
 107                 public Value GetValue (LocalVariable var) {
 108                         if (var == null)
 109                                 throw new ArgumentNullException ("var");
 110                         if (var.Method != Method)
 111                                 throw new ArgumentException ("Local variable doesn't belong to this frame's method.");
 112
 113                         // FIXME: Liveness
 114                         // FIXME: Check for return value
 115                         // FIXME: Allow returning the frame return value if possible
 116                         return vm.DecodeValue (vm.conn.StackFrame_GetValues (thread.Id, Id, new int [] { var.GetValueIndex } )[0]);
 117                 }
 118
 119                 public Value[] GetValues (LocalVariable[] vars) {
 120                         if (vars == null)
 121                                 throw new ArgumentNullException ("vars");
 122                         for (int i = 0; i < vars.Length; ++i) {
 123                                 if (vars [i] == null)
 124                                         throw new ArgumentNullException ("vars");
 125                                 if (vars [i].Method != Method)
 126                                         throw new ArgumentException ("Local variable doesn't belong to this frame's method.");
 127                         }
 128                         int[] pos = new int [vars.Length];
 129                         for (int i = 0; i < vars.Length; ++i)
 130                                 pos [i] = vars [i].GetValueIndex;
 131                         return vm.DecodeValues (vm.conn.StackFrame_GetValues (thread.Id, Id, pos));
 132                 }
 133
 134                 public Value GetArgument (int pos) {
 135                         return GetValue (Method.GetParameters () [pos]);
 136                 }
 137
 138                 public Value GetThis () {
 139                         return vm.DecodeValue (vm.conn.StackFrame_GetThis (thread.Id, Id));
 140                 }
 141
 142                 public void SetValue (LocalVariable var, Value value) {
 143                         if (var == null)
 144                                 throw new ArgumentNullException ("var");
 145                         if (var.Method != Method)
 146                                 throw new ArgumentException ("Local variable doesn't belong to this frame's method.");
 147                         if (value == null)
 148                                 throw new ArgumentNullException ("value");
 149                         CheckMirror (value);
 150                         // FIXME: Liveness
 151                         // FIXME: Check for return value
 152                         try {
 153                                 vm.conn.StackFrame_SetValues (thread.Id, Id, new int [] { var.GetValueIndex }, new ValueImpl [] { vm.EncodeValue (value) });
 154                         } catch (CommandException ex) {
 155                                 if (ex.ErrorCode == ErrorCode.INVALID_ARGUMENT)
 156                                         throw new ArgumentException ("Value does not match the type of the local variable.");
 157                                 else
 158                                         throw;
 159                         }
 160                 }
 161
 162                 public void SetValue (ParameterInfoMirror param, Value value) {
 163                         if (param == null)
 164                                 throw new ArgumentNullException ("param");
 165                         if (param.Method != Method)
 166                                 throw new ArgumentException ("Parameter doesn't belong to this frame's method.");
 167                         if (param.IsRetval)
 168                                 throw new ArgumentException ("Parameter represents the method return value.");
 169                         if (value == null)
 170                                 throw new ArgumentNullException ("value");
 171                         CheckMirror (value);
 172
 173                         // FIXME: Liveness
 174                         // FIXME: Allow setting the frame return value if possible
 175                         try {
 176                                 vm.conn.StackFrame_SetValues (thread.Id, Id, new int [] { (- param.Position) - 1 }, new ValueImpl [] { vm.EncodeValue (value) });
 177                         } catch (CommandException ex) {
 178                                 if (ex.ErrorCode == ErrorCode.INVALID_ARGUMENT)
 179                                         throw new ArgumentException ("Value does not match the type of the variable.");
 180                                 else
 181                                         throw;
 182                         }
 183                 }
 184
 185                 public IList<LocalVariable> GetVisibleVariables () {
 186                         if (Location.ILOffset == -1)
 187                                 throw new AbsentInformationException ();
 188
 189                         return Method.GetLocals ().Where (l => l.LiveRangeStart <= location.ILOffset && l.LiveRangeEnd >= location.ILOffset).ToList ();
 190                 }
 191
 192                 public LocalVariable GetVisibleVariableByName (string name) {
 193                         if (name == null)
 194                                 throw new ArgumentNullException ("name");
 195
 196                         if (Location.ILOffset == -1)
 197                                 throw new AbsentInformationException ();
 198
 199                         return Method.GetLocals ().Where (l => l.LiveRangeStart <= location.ILOffset && l.LiveRangeEnd >= location.ILOffset && l.Name == name).FirstOrDefault ();
 200                 }
 201     }
 202 }