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                        <h1 id="ltrace1"><a class="header" href="#ltrace1">ltrace(1)</a></h1>
<pre><code class="language-markdown">ltrace [opts] [prg]
  -f .......... follow child processes on fork(2)
  -p &lt;pid&gt; .... attach to running process
  -o &lt;file&gt; ... log output into &lt;file&gt;
  -l &lt;filter&gt; . show who calls into lib matched by &lt;filter&gt;
  -C .......... demangle
  -e &lt;filter&gt; . show calls symbols matched by &lt;filter&gt;
  -x &lt;filter&gt; . which symbol table entry points to trace
                (can be of form sym_pattern@lib_pattern)
  -n &lt;num&gt;      number of spaces to indent nested calls
</code></pre>
<h1 id="example"><a class="header" href="#example">Example</a></h1>
<p>List which program/libs call into <code>libstdc++</code>:</p>
<pre><code class="language-bash">ltrace -l '*libstdc++*' -C -o ltrace.log ./main
</code></pre>
<p>List calls to specific symbols:</p>
<pre><code class="language-bash">ltrace -e malloc -e free ./main
</code></pre>
<p>Trace symbols from <code>dlopen(3)</code>ed libraries.</p>
<pre><code class="language-bash"># Assume libfoo.so would be dynamically loaded via dlopen.
ltrace -x '@libfoo.so'

# Trace all dlopened symbols.
ltrace -x '*'
# Trace all symbols from dlopened libraries which name match the
# pattern "liby*".
ltrace -x '@liby*'
# Trace symbol "foo" from all dlopened libraries matching the pattern.
ltrace -x 'foo@liby*'
</code></pre>

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                        <h1 id="ltrace1"><a class="header" href="#ltrace1">ltrace(1)</a></h1>
<pre><code class="language-markdown">ltrace [opts] [prg]
  -f .......... follow child processes on fork(2)
  -p &lt;pid&gt; .... attach to running process
  -o &lt;file&gt; ... log output into &lt;file&gt;
  -l &lt;filter&gt; . show who calls into lib matched by &lt;filter&gt;
  -C .......... demangle
  -e &lt;filter&gt; . show calls symbols matched by &lt;filter&gt;
  -x &lt;filter&gt; . which symbol table entry points to trace
                (can be of form sym_pattern@lib_pattern)
  -n &lt;num&gt;      number of spaces to indent nested calls
</code></pre>
<h1 id="example"><a class="header" href="#example">Example</a></h1>
<p>List which program/libs call into <code>libstdc++</code>:</p>
<pre><code class="language-bash">ltrace -l '*libstdc++*' -C -o ltrace.log ./main
</code></pre>
<p>List calls to specific symbols:</p>
<pre><code class="language-bash">ltrace -e malloc -e free ./main
</code></pre>
<p>Trace symbols from <code>dlopen(3)</code>ed libraries.</p>
<pre><code class="language-bash"># Assume libfoo.so would be dynamically loaded via dlopen.
ltrace -x '@libfoo.so'

# Trace all dlopened symbols.
ltrace -x '*'
# Trace all symbols from dlopened libraries which name match the
# pattern "liby*".
ltrace -x '@liby*'
# Trace symbol "foo" from all dlopened libraries matching the pattern.
ltrace -x 'foo@liby*'
</code></pre>

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