Joost van der Sluis wrote:
On 03/27/2015 01:45 PM, JuuS wrote:
procedure BreakIf( b : Boolean );
begin
if b then
asm
INT 3 <======debugger would then stop here
and one could then F8 step to the offending
routine based on the boolean condition passed
end;
end;
I believe this is windows specific (?) and I'm now working on Linux
machines.
The question is:
This does not work in Linux and I wonder if there is a similar way to
achieve this in Linux environment?
Wow.. that's a nasty trick....
And it should still work, also on Linux.
But I think that debuggers nowadays are more clever, they detect that
the breakpoint is actually self-inflicted, and so they decide to
continue. After all: the developer can have it's reasons to call this
interrupt, and the debugger should not influence normal execution.
I don't know if fpdebug has this same check. (I think it has, though,
but I'm not sure) If you are using a development Lazarus version you can
try to install the LazDebuggerFp package, and choose the 'Fpdebug
internal Dwarf-debugger' as debugger in the debugger-options. See what
happens if you do that...
when setting a BP, (the original) fpdebug checks if location of the BP
already has a INT3 (not sure about INT 3). In that case it doesn't
insert a new one, it only records it.
So fpdebug is aware of coded breakpoints. when it hits a coded BP, it
stops execution (and might raise a SIGTRAP)
Marc
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