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<title>SystemTap: probes/tasklet/stp_tasklet.c Source File</title>
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<a class="el" href="dir_000000.html">probes</a> / <a class="el" href="dir_000002.html">tasklet</a></div>
<h1>stp_tasklet.c</h1><div class="fragment"><pre class="fragment">00001 <span class="comment">/* Framework for putting a jprobe in a tasklet. */</span>
00002 <span class="comment">/* Useful for testing probes in interrupt context. */</span>
00003 <span class="comment">/* Doesn't do anything useful as is. Put test code in the inst func */</span>
00004
00005 <span class="preprocessor">#define HASH_TABLE_BITS 8</span>
00006 <span class="preprocessor"></span><span class="preprocessor">#define HASH_TABLE_SIZE (1<<HASH_TABLE_BITS)</span>
00007 <span class="preprocessor"></span><span class="preprocessor">#define BUCKETS 16 </span><span class="comment">/* largest histogram width */</span>
00008
00009 <span class="preprocessor">#include "runtime.h"</span>
00010 <span class="preprocessor">#include "<a class="code" href="io_8c.html">io.c</a>"</span>
00011 <span class="preprocessor">#include "<a class="code" href="probes_8c.html">probes.c</a>"</span>
00012
00013 MODULE_DESCRIPTION(<span class="stringliteral">"test jprobes of tasklets"</span>);
00014 MODULE_AUTHOR(<span class="stringliteral">"Martin Hunt <hunt@redhat.com>"</span>);
00015
00016 <span class="keywordtype">void</span> inst__rcu_process_callbacks(<span class="keyword">struct</span> rcu_ctrlblk *rcp,
00017 <span class="keyword">struct</span> rcu_state *rsp, <span class="keyword">struct</span> rcu_data *rdp)
00018 {
00019 <a class="code" href="io_8c.html#a4">dlog</a> (<span class="stringliteral">"interrupt=%d\n"</span>, in_interrupt());
00020 jprobe_return();
00021 }
00022
00023 <span class="keyword">static</span> <span class="keyword">struct </span>jprobe stp_probes[] = {
00024 {
00025 .kp.addr = (kprobe_opcode_t *)<span class="stringliteral">"__rcu_process_callbacks"</span>,
00026 .entry = (kprobe_opcode_t *) inst__rcu_process_callbacks
00027 },
00028 };
00029 <span class="preprocessor">#define MAX_STP_PROBES (sizeof(stp_probes)/sizeof(struct jprobe))</span>
00030 <span class="preprocessor"></span>
00031
00032 <span class="keyword">static</span> <span class="keywordtype">int</span> init_stp(<span class="keywordtype">void</span>)
00033 {
00034 <span class="keywordtype">int</span> ret = <a class="code" href="probes_8c.html#a2">_stp_register_jprobes</a> (stp_probes, MAX_STP_PROBES);
00035 <a class="code" href="io_8c.html#a4">dlog</a>(<span class="stringliteral">"instrumentation is enabled...\n"</span>);
00036 <span class="keywordflow">return</span> ret;
00037 }
00038
00039 <span class="keyword">static</span> <span class="keywordtype">void</span> cleanup_stp(<span class="keywordtype">void</span>)
00040 {
00041 <a class="code" href="probes_8c.html#a1">_stp_unregister_jprobes</a> (stp_probes, MAX_STP_PROBES);
00042 <a class="code" href="io_8c.html#a4">dlog</a> (<span class="stringliteral">"EXIT\n"</span>);
00043 }
00044
00045 module_init(init_stp);
00046 module_exit(cleanup_stp);
00047 MODULE_LICENSE(<span class="stringliteral">"GPL"</span>);
00048
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