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====== Conditionally Debuggable lDebug ======

The "go everywhere, do everything" theme
of lDebug has [[https://hg.pushbx.org/ecm/ldebug/rev/b811a771edf4|gained a new feature]]:
Conditionally Debuggable builds
allow to switch between the non-debuggable mode
(handlers are hooked when the debugger starts up
and unhooked only when it terminates),
and the debuggable mode.

In the debuggable mode, the prior debugger's handlers
are preserved in most of the debuggable application.
Only when calling the ''run'' function,
the debuggable debugger sets up its own handlers.
That means a great majority of the debuggable's code
can be debugged using another instance of lDebug.

Traditionally, FreeDOS Debug would require
a lower-level debugger like one built into
a virtual machine to be debugged.
In recent years build options were added
to never hook interrupts 1 (trace interrupt)
and 3 (breakpoint interrupt), allowing to
debug most parts.
However, these options imply that you
cannot actually run a debuggee and have it
return control to the instance that is
to be debugged. 

{{tag>ldebug options}}


~~DISCUSSION~~

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