[Mono-bugs] [Bug 411948] New: MDB can't examine arrays of structs

[bugzilla_noreply at novell.com]

https://bugzilla.novell.com/show_bug.cgi?id=411948


           Summary: MDB can't examine arrays of structs
           Product: Mono: Debugger
           Version: SVN
          Platform: Other
        OS/Version: Other
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: backend
        AssignedTo: martin at novell.com
        ReportedBy: lluis at novell.com
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---


See this use case:

using System;

namespace Test
{
        public struct SomeStruct
        {
        }

        class MainClass
        {
                public static void Main(string[] args)
                {
                        SomeStruct[] arr = new SomeStruct [10];
                        Console.WriteLine ("Instance Ready");
                }
        }
}

MDB fails when trying to examine the value of an element of the array:

lluis at portador:~/temp> mdb kk.exe
Mono Debugger
(mdb) r
Starting program: kk.exe 
Thread @1 stopped at #0: 0xb794a23e in Test.MainClass.Main(string[])+0x6 at
/home/lluis/temp/kk.cs:13.
  13                    SomeStruct[] arr = new SomeStruct [10];
(mdb) n
Thread @1 stopped at #0: 0xb794a25d in Test.MainClass.Main(string[])+0x25 at
/home/lluis/temp/kk.cs:14.
  14                    Console.WriteLine ("Instance Ready");
(mdb) p arr[0]
ERROR: Caught exception while executing command
Mono.Debugger.Frontend.DebuggerEngine: System.InvalidOperationException:
Operation is not valid due to the current state of the object
  at Mono.Debugger.Languages.TargetArrayObject.GetArrayOffset
(Mono.Debugger.TargetMemoryAccess target, System.Int32[] indices) [0x00146] in
/home/lluis/nowork/debugger/languages/TargetArrayObject.cs:75 
  at Mono.Debugger.Languages.Mono.MonoArrayObject.GetElement
(Mono.Debugger.TargetMemoryAccess target, System.Int32[] indices) [0x00000] in
/home/lluis/nowork/debugger/languages/mono/MonoArrayObject.cs:45 
  at
Mono.Debugger.Languages.TargetArrayObject+<>c__CompilerGenerated38.<GetElement>c__110
(Mono.Debugger.TargetMemoryAccess target) [0x00000] in
/home/lluis/nowork/debugger/languages/TargetArrayObject.cs:96 
  at
Mono.Debugger.Backend.SingleSteppingEngine+<>c__CompilerGenerated7.<DoTargetAccess>c__79
(Mono.Debugger.Thread +11, System.Object +12) [0x00000] in
/home/lluis/nowork/debugger/backend/SingleSteppingEngine.cs:787 
  at
Mono.Debugger.Backend.SingleSteppingEngine+<>c__CompilerGenerated33.<Invoke>c__105
(Mono.Debugger.Thread +115, System.Object +116) [0x00000] in
/home/lluis/nowork/debugger/backend/SingleSteppingEngine.cs:1908 
  at Mono.Debugger.Backend.SingleSteppingEngine.SendCommand
(Mono.Debugger.TargetAccessDelegate target) [0x00022] in
/home/lluis/nowork/debugger/backend/SingleSteppingEngine.cs:609 
  at Mono.Debugger.Backend.SingleSteppingEngine.Invoke
(Mono.Debugger.TargetAccessDelegate func, System.Object data) [0x0001d] in
/home/lluis/nowork/debugger/backend/SingleSteppingEngine.cs:1907 
  at Mono.Debugger.Backend.ThreadManager.engine_thread_main () [0x0014e] in
/home/lluis/nowork/debugger/backend/ThreadManager.cs:338 
(mdb)


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