Debugging - GDB tricks

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Revision as of 10:38, 27 March 2008 by Petr-K (talk | contribs) (General tricks)

General tricks

  • Some pascal specific patches were excepted; so if possible set language to pascal "set language pascal"
  • To get help, use "help <command>" or "help" to see a category list.
  • To view datastructures raw, use the "x" command (see "help x")

Examining Type Info

  • Q: What function should I use for dumping the type info?
  • A: Run x/100c in gdb until it frames. then use 'frame <framenr>' to jump to the correct frame

Inspecting an ansistring

  • Q: How do I examine an ansistring?
  • A: "x/s <stringname>"

Stop debugger on exception

  • Q: How to stop gdb on exception
  • A: b fpc_raiseexception
  • Q: How to show call stack
  • A: bt

Work with breakpoints

  • Add: b TObject__Method or b filename.pas:123
  • Show: inf b
  • Disable: dis 1
  • Enble: en 1
  • Delete: d 1
  • Delete all: d b