<s>
ltrace	B-Device
is	O
a	O
debugging	O
utility	O
in	O
Linux	B-Application
,	O
used	O
to	O
display	O
the	O
calls	O
a	O
userspace	B-Operating_System
application	O
makes	O
to	O
shared	O
libraries	O
.	O
</s>
<s>
It	O
does	O
this	O
by	O
hooking	O
into	O
the	O
dynamic	B-Operating_System
loading	I-Operating_System
system	O
,	O
allowing	O
it	O
to	O
insert	O
shims	B-General_Concept
which	O
display	O
the	O
parameters	O
which	O
the	O
applications	O
uses	O
when	O
making	O
the	O
call	O
,	O
and	O
the	O
return	B-Language
value	I-Language
which	O
the	O
library	O
call	O
reports	O
.	O
</s>
<s>
ltrace	B-Device
can	O
also	O
trace	O
Linux	B-Application
system	B-Operating_System
calls	I-Operating_System
.	O
</s>
<s>
Because	O
it	O
uses	O
the	O
dynamic	O
library	O
hooking	O
mechanism	O
,	O
ltrace	B-Device
cannot	O
trace	O
calls	O
to	O
libraries	O
which	O
are	O
statically	B-Library
linked	I-Library
directly	O
to	O
the	O
target	O
binary	O
.	O
</s>
<s>
Since	O
0.7.3	O
,	O
ltrace	B-Device
can	O
also	O
trace	O
calls	O
to	O
libraries	O
which	O
are	O
loaded	O
using	O
dlopen	B-Operating_System
.	O
</s>
<s>
It	O
shows	O
ltrace	B-Device
displaying	O
calls	O
to	O
a	O
variety	O
of	O
libraries	O
,	O
including	O
the	B-Language
C	I-Language
standard	I-Language
library	I-Language
(	O
malloc	O
,	O
strlen	O
)	O
,	O
POSIX	B-Language
libraries	I-Language
(	O
getuid	O
)	O
,	O
X	B-Language
Toolkit	I-Language
Intrinsics	I-Language
(	O
XtOpenApplication	O
)	O
,	O
and	O
the	O
X11	O
inter-client	O
communication	O
library	O
(	O
IceAddConnectionWatch	O
)	O
.	O
</s>
<s>
A	O
call	O
's	O
return	B-Language
value	I-Language
is	O
shown	O
after	O
the	O
=	O
symbol	O
.	O
</s>
