On Mon, 20 Feb 2023, Martin Frb via lazarus wrote:
On 20/02/2023 12:31, Michael Van Canneyt via lazarus wrote:
I'm trying to set a condition on a breakpoint.
I have a local variable aUnit, type string:
var
aUnit : string;
I wish the breakpoint is only triggered when aUnit equals 'termio'.
So, in the breakpoint properties dialog, I enter the condition:
aUnit='termio'
It seems to have no effect whatsoever. The breakpoint is triggered
always at
the first traversal of the line.
I tried variations (uppercase, lowercase) , but to no avail.
Looking at the debug internals window, I see that the expression is
only (correctly) evaluated by gdb when I move the mouse over the
identifier
in the sources:
(gdb) <ptype AUNIT>
gdb doesn't know pascal strings, or how do an "=" operation on them.
You can try to get $_streq(myvar, "hello") to work....
https://sourceware.org/gdb/onlinedocs/gdb/Convenience-Funs.html
Or use FpDebug. FpDebug can compare strings.
I suggest you adapt the wiki to clarify all this.
While you're at it, The link in the wiki page to the gdb convenience
functions is broken.
In general, I don't think you can expect the user to know that he should use
$_streq(myvar, "hello"), specially the cmem condition that seems necessary.
Ideally, the IDE could detect a string and transform the expression.
Michael.
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