IDE Window: Debugger Options

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General

Debugger options general.png

Debugger type and path

Choose the debugger.

None
No debugger. On Run, simply execute the program.
GNU debugger (gdb)
The gdb is not part of Lazarus. Unless you are using windows, you must install it yourself. This is the connector to gdb. You must set the path to gdb (for example /usr/bin/gdb) in the field below.
GNU debugger through SSH
for remote debugging. You can use a SSH connection to a another computer and execute gdb there. You need a SSH connection without prompt for password for this. See the SSH documentation on how to do that. This feature has certain limits. Read more ...

Additional search path

You can add extra directories, where to search for sources, named in the debugging information of the executable. This is used for all projects.

Debugger general options

Show message on stop
Enable this to show a notification, when programs stops.
Reset debugger after each run
The IDE keeps GDB running and re-uses it. If you are using a (older) version of GDB that does not support this, then you can start a new GDB instance each time you start a debug session.

Debugger specific options

Each debugger type has special options.

GNU debugger (gdb)

Debugger_Startup_Options
Pass extra arguments to GDB. This is not needed for normal usage. This is if you are familiar with GDB and wish to modify it's behaviour. Using this option may interfere with the proper working of the debugger
EncodeCurrentDirPath/EncodeCurrentFilePath
Experimental. Those option affect the quoting of certain path/filenames when they are given to GDB. Changing the option to the wrong value will stop the debugger from working.
InternalStartBreak
Changes the way the debugger detects your applications, main entry point. It is advised to leave this at default. Other values may be tried, if the debugger report an error "The debugger could not set a breakpoint on the applications entry point".
TimeOutForEval/WarnOnTimeOut
Read GDB_Debugger_Tips#TimeOuts

Event Log

Debugger options eventlog.png

General

Eventually logging info should go the the event log, for now it is show in the debug output window.

  • Clear log on run: clear the event log, on each start of the program.
  • Limit line count to: keep only the last lines of output.

Messages

(not implemented)

This controls which messages are logged in the event log

Language Exceptions

Debugger options language exceptions.png

Programs can raise exceptions. For example, when a file can not be read. Here you setup, if the debugger should stop on an exception.

Ignore these exceptions

Add your exceptions to ignore here. For example: EDivByZero

Break on Lazarus Exceptions

Uncheck this option if you don't want to stop on any exception

OS Exceptions

Debugger options os exceptions.png

Signals

(not implemented)

Defines if signals should be handled by the debugger or by the user program. For instance, an div by zero is first signalled by the OS. Then the FPC RTL translates this to an EDivByZero. When the signal is handled by the debugger, the program is stopped before the RTL translates this message. Currently the debugger always stops on a signal.

See also