Ah, typically, it&#39;s not always optimized out everywhere. The trick is to <br>
find a frame where you still have access to the structure and get the fd <br>
value. For instance in frame 6:<br>
<br>
#6  0x0000003407a094ca in XrdFfsWcache_create (fd=0) at<br>
/usr/src/debug/xrootd/xrootd/src/XrdFfs/XrdFfsWcache.cc:114<br>
<br>
we know fd is zero and in that frame we can look to see what <br>
XrdFfsWcacheFbufs[0] look like. The reason it&#39;s optimized out in future <br>
frames is because the compiler eliminates stack frames whete i thinks it <br>
doesn&#39;t need them and simply keeps the value in a register.<br>
<br>
Andy<br>
<br>
<br>
On Wed, 15 Jan 2020, Geonmo Ryu wrote:<br>
<br>
&gt; Unfortunately, I can not see the values due to compiler optimized.<br>
&gt;<br>
&gt; (gdb) p XrdFfsWcacheFbufs[fd]<br>
&gt; value has been optimized out<br>
&gt;<br>
&gt;<br>
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