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56 lines
1.9 KiB
C
56 lines
1.9 KiB
C
3 weeks ago
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/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkBreakPoint.h
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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/**
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* @class vtkBreakPoint
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* @brief Utility function to debug with gdb and MPI.
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*
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* Wherever you need to set a break point inside a piece of code run by MPI,
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*
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* Step 1: call vtkBreakPoint::Break() in the code.
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* Step 2: start MPI, each process will display its PID and sleep.
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* Step 3: start gdb with the PID: gdb --pid=<PID>
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* Step 4: set a breakpoint at the line of interest: (gdb) b <option>
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* Step 5: go out of the sleep: (gdb) set var i=1
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* Original instructions at the OpenMPI FAQ:
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* http://www.open-mpi.de/faq/?category=debugging#serial-debuggers
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* - 6 Can I use serial debuggers (such as gdb) to debug MPI applications?
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* - 6.1. Attach to individual MPI processes after they are running.
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*
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* @par Implementation:
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* This function is in Common, not in Parallel because it does not depend on
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* MPI and you may want to call vtkBreakPoint::Break() in any class of VTK.
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*/
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#ifndef vtkBreakPoint_h
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#define vtkBreakPoint_h
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#include "vtkCommonCoreModule.h" // For export macro
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#include "vtkObject.h" // to get VTKCOMMONCORE_EXPORT
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class VTKCOMMONCORE_EXPORT vtkBreakPoint
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{
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public:
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//@{
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/**
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* Process fall asleep until local variable `i' is set to a value different
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* from 0 inside a debugger.
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*/
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static void Break();
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//@}
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};
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#endif // #ifndef vtkBreakPoint_h
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// VTK-HeaderTest-Exclude: vtkBreakPoint.h
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