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Mailing lists / lazarus / 2011-09

Thread debugging problem

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Leonardo M. Ramé

Hi, since updating my Lazarus version from svn (I was using a one month old version) I'm getting a SIGABRT exception in a thread.

The exception apparently is raised while adding items to a TCollection that is created in the main thread, then passed as parameter to the newly created thread. If I comment the line "mycollection.add" the error disapears.

This is the lazarus log I get when running from command line, hope it helps find the problem:

TMainIDE.DoInitProjectRun ProgramFilename=/home/leonardo/Desarrollo/griensu/GViewerIII/dicomviewer TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger [TCmdLineDebugger] Debug PID: 16190
TGDBMIDebugger.ProcessResult Error: ,msg="No symbol table is loaded. Use the \"file\" command." [Debugger] Running GDB version: Ubuntu/Linaro 7.2-1ubuntu11 [TDebugger.SetFileName] "/home/leonardo/Desarrollo/griensu/GViewerIII/dicomviewer" [TMainIDE.DoRunProject] B TGDBMIDebugger
[TMainIDE.DoRunProject] END
TGDBMIDebugger.StartDebugging WorkingDir="/home/leonardo/Desarrollo/griensu/GViewerIII/" TGDBMIDebugger.ProcessResult Error: ,msg="No symbol \"FPC_THREADVAR_RELOCATE_PROC\" in current context." [Debugger] Log output: &"info functions FPC_CPUINIT\n" [Debugger] Log output: &"set width 50000\n"
[Debugger] Log output: &"set inferior-tty /dev/pts/2\n" [Debugger] Log output: &"info address main\n"
[Debugger] Log output: &"ptype TObject\n"
[Debugger] Log output: &"ptype Exception\n"
[Debugger] Log output: &"ptype Shortstring\n"
[Debugger] Log output: &"ptype pointer\n"
[Debugger] Log output: &"ptype byte\n"
[Debugger] Log output: &"info address FPC_RAISEEXCEPTION\n" [Debugger] Log output: &"info address FPC_BREAK_ERROR\n" [Debugger] Log output: &"info address FPC_RUNERROR\n" [Debugger] Log output: &"info file\n"
[Debugger] File type:
[Debugger] Entry point:
[WARNING] [Debugger.TargetInfo] Unknown FileType: , using GDB cpu [Debugger] Log output: &"Funci\303\263n \302\253foo\302\273 no definida.\n" [Debugger] Console output: ~"[Depuraci\303\263n de hilo usando libthread_db enabled]\n" [Debugger] Log output: &"info program\n"
[Debugger] Target PID: 16192
[Debugger] Log output: &"info line \"/home/leonardo/Desarrollo/griensu/GViewerIII/images.pas\":612\n" [Debugger] Console output: ~"[Nuevo Thread 0x7fffef0bd700 (LWP 16195)]\n" [DBGTGT] *
[DBGTGT] running,thread-id="all"
[Debugger] Console output: ~"[Nuevo Thread 0x7fffee8bc700 (LWP 16196)]\n" [DBGTGT] *
[DBGTGT] running,thread-id="all"
[Debugger] Console output: ~"[Nuevo Thread 0x7fffecd9a700 (LWP 16197)]\n" [DBGTGT] *
[DBGTGT] running,thread-id="all"
[Debugger] Console output: ~"[Cambiando a Thread 0x7fffecd9a700 (LWP 16197)]\n" [WARNING] Debugger: Unexpected async-record: =thread-selected,id="4"

Leonardo M. Ram? http://leonardorame.blogspot.com

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Leonardo M. Ramé
to Leonardo M. Ramé
Leonardo M. Ram? wrote 91 lines
Hi, since updating my Lazarus version from svn (I was using a one month old version) I'm getting a SIGABRT exception in a thread. The exception apparently is raised while adding items to a TCollection that is created in the main thread, then passed as parameter to the newly created thread. If I comment the line "mycollection.add" the error disapears. This is the lazarus log I get when running from command line, hope it helps find the problem: TMainIDE.DoInitProjectRun ProgramFilename=/home/leonardo/Desarrollo/griensu/GViewerIII/dicomviewer TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger TDebugger.ReqCmd Command not supported: Environment ClassName=TGDBMIDebugger [TCmdLineDebugger] Debug PID: 16190 TGDBMIDebugger.ProcessResult Error: ,msg="No symbol table is loaded. Use the \"file\" command." [Debugger] Running GDB version: Ubuntu/Linaro 7.2-1ubuntu11 [TDebugger.SetFileName] "/home/leonardo/Desarrollo/griensu/GViewerIII/dicomviewer" [TMainIDE.DoRunProject] B TGDBMIDebugger [TMainIDE.DoRunProject] END TGDBMIDebugger.StartDebugging WorkingDir="/home/leonardo/Desarrollo/griensu/GViewerIII/" TGDBMIDebugger.ProcessResult Error: ,msg="No symbol \"FPC_THREADVAR_RELOCATE_PROC\" in current context." [Debugger] Log output: &"info functions FPC_CPUINIT\n" [Debugger] Log output: &"set width 50000\n" [Debugger] Log output: &"set inferior-tty /dev/pts/2\n" [Debugger] Log output: &"info address main\n" [Debugger] Log output: &"ptype TObject\n" [Debugger] Log output: &"ptype Exception\n" [Debugger] Log output: &"ptype Shortstring\n" [Debugger] Log output: &"ptype pointer\n" [Debugger] Log output: &"ptype byte\n" [Debugger] Log output: &"info address FPC_RAISEEXCEPTION\n" [Debugger] Log output: &"info address FPC_BREAK_ERROR\n" [Debugger] Log output: &"info address FPC_RUNERROR\n" [Debugger] Log output: &"info file\n" [Debugger] File type: [Debugger] Entry point: [WARNING] [Debugger.TargetInfo] Unknown FileType: , using GDB cpu [Debugger] Log output: &"Funci\303\263n \302\253foo\302\273 no definida.\n" [Debugger] Console output: ~"[Depuraci\303\263n de hilo usando libthread_db enabled]\n" [Debugger] Log output: &"info program\n" [Debugger] Target PID: 16192 [Debugger] Log output: &"info line \"/home/leonardo/Desarrollo/griensu/GViewerIII/images.pas\":612\n" [Debugger] Console output: ~"[Nuevo Thread 0x7fffef0bd700 (LWP 16195)]\n" [DBGTGT] * [DBGTGT] running,thread-id="all" [Debugger] Console output: ~"[Nuevo Thread 0x7fffee8bc700 (LWP 16196)]\n" [DBGTGT] * [DBGTGT] running,thread-id="all" [Debugger] Console output: ~"[Nuevo Thread 0x7fffecd9a700 (LWP 16197)]\n" [DBGTGT] * [DBGTGT] running,thread-id="all" [Debugger] Console output: ~"[Cambiando a Thread 0x7fffecd9a700 (LWP 16197)]\n" [WARNING] Debugger: Unexpected async-record: =thread-selected,id="4"

Sorry, I found the solution. It was related to instantiating a TBGRABitmap before the main form is shown.

Leonardo M. Ram? http://leonardorame.blogspot.com

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