<s>
Dmalloc	B-Application
is	O
a	O
C	B-Language
memory	B-General_Concept
debugger	I-General_Concept
library	O
written	O
by	O
Gray	O
Watson	O
to	O
assist	O
programmers	O
in	O
finding	O
a	O
variety	O
of	O
dynamic	B-General_Concept
memory	I-General_Concept
allocation	I-General_Concept
mistakes	O
.	O
</s>
<s>
It	O
replaces	O
parts	O
(	O
such	O
as	O
malloc	B-Language
)	O
of	O
the	B-Language
C	I-Language
standard	I-Language
library	I-Language
provided	O
by	O
the	O
operating	B-General_Concept
system	I-General_Concept
or	O
compiler	B-Language
with	O
its	O
own	O
versions	O
,	O
which	O
produce	O
information	O
intended	O
to	O
help	O
the	O
programmer	O
detect	O
problematic	O
code	O
.	O
</s>
<s>
Dmalloc	B-Application
can	O
find	O
memory	B-Error_Name
leaks	I-Error_Name
,	O
off-by-one	B-Error_Name
errors	I-Error_Name
,	O
and	O
usage	O
of	O
invalid	O
addresses	O
in	O
some	O
library	O
functions	O
calls	O
.	O
</s>
