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<title>SystemTap: probes/test4/dtr.c Source File</title>
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<a class="el" href="dir_000000.html">probes</a> / <a class="el" href="dir_000003.html">test4</a></div>
<h1>dtr.c</h1><div class="fragment"><pre class="fragment">00001 <span class="preprocessor">#define HASH_TABLE_BITS 8</span>
00002 <span class="preprocessor"></span><span class="preprocessor">#define HASH_TABLE_SIZE (1<<HASH_TABLE_BITS)</span>
00003 <span class="preprocessor"></span><span class="preprocessor">#define BUCKETS 16 </span><span class="comment">/* largest histogram width */</span>
00004
00005 <span class="preprocessor">#include "runtime.h"</span>
00006 <span class="preprocessor">#include "<a class="code" href="io_8c.html">io.c</a>"</span>
00007 <span class="preprocessor">#include "<a class="code" href="map_8c.html">map.c</a>"</span>
00008 <span class="preprocessor">#include "<a class="code" href="probes_8c.html">probes.c</a>"</span>
00009
00010 MODULE_DESCRIPTION(<span class="stringliteral">"SystemTap probe: test4"</span>);
00011 MODULE_AUTHOR(<span class="stringliteral">"Martin Hunt <hunt@redhat.com>"</span>);
00012
00013 <a class="code" href="structmap__root.html">MAP</a> opens, reads, writes;
00014
00015 asmlinkage <span class="keywordtype">long</span> inst_sys_open (<span class="keyword">const</span> <span class="keywordtype">char</span> __user * filename, <span class="keywordtype">int</span> flags, <span class="keywordtype">int</span> mode)
00016 {
00017 <a class="code" href="map_8c.html#a13">_stp_map_key_str</a> (opens, current->comm);
00018 <a class="code" href="map_8c.html#a18">_stp_map_add_int64</a> (opens, 1);
00019 jprobe_return();
00020 <span class="keywordflow">return</span> 0;
00021 }
00022
00023 asmlinkage ssize_t inst_sys_read (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> fd, <span class="keywordtype">char</span> __user * buf, size_t count)
00024 {
00025 <a class="code" href="map_8c.html#a13">_stp_map_key_str</a> (reads, current->comm);
00026 <a class="code" href="map_8c.html#a24">_stp_map_stat_add</a> (reads, count);
00027 jprobe_return();
00028 <span class="keywordflow">return</span> 0;
00029 }
00030
00031 asmlinkage ssize_t inst_sys_write (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> fd, <span class="keyword">const</span> <span class="keywordtype">char</span> __user * buf, size_t count)
00032 {
00033 <a class="code" href="map_8c.html#a13">_stp_map_key_str</a> (writes, current->comm);
00034 <a class="code" href="map_8c.html#a24">_stp_map_stat_add</a> (writes, count);
00035 jprobe_return();
00036 <span class="keywordflow">return</span> 0;
00037 }
00038
00039 <span class="keyword">static</span> <span class="keyword">struct </span>jprobe dtr_probes[] = {
00040 {
00041 .kp.addr = (kprobe_opcode_t *)<span class="stringliteral">"sys_open"</span>,
00042 .entry = (kprobe_opcode_t *) inst_sys_open
00043 },
00044 {
00045 .kp.addr = (kprobe_opcode_t *)<span class="stringliteral">"sys_read"</span>,
00046 .entry = (kprobe_opcode_t *) inst_sys_read
00047 },
00048 {
00049 .kp.addr = (kprobe_opcode_t *)<span class="stringliteral">"sys_write"</span>,
00050 .entry = (kprobe_opcode_t *) inst_sys_write
00051 },
00052 };
00053
00054 <span class="preprocessor">#define MAX_DTR_ROUTINE (sizeof(dtr_probes)/sizeof(struct jprobe))</span>
00055 <span class="preprocessor"></span>
00056 <span class="keyword">static</span> <span class="keywordtype">int</span> init_dtr(<span class="keywordtype">void</span>)
00057 {
00058 <span class="keywordtype">int</span> ret;
00059
00060 opens = <a class="code" href="map_8c.html#a3">_stp_map_new</a> (1000, INT64);
00061 reads = <a class="code" href="map_8c.html#a3">_stp_map_new</a> (1000, STAT);
00062 writes = <a class="code" href="map_8c.html#a3">_stp_map_new</a> (1000, STAT);
00063
00064 ret = <a class="code" href="probes_8c.html#a2">_stp_register_jprobes</a> (dtr_probes, MAX_DTR_ROUTINE);
00065
00066 <a class="code" href="io_8c.html#a4">dlog</a>(<span class="stringliteral">"instrumentation is enabled...\n"</span>);
00067 <span class="keywordflow">return</span> ret;
00068
00069 }
00070
00071 <span class="keyword">static</span> <span class="keywordtype">void</span> cleanup_dtr(<span class="keywordtype">void</span>)
00072 {
00073 <span class="keyword">struct </span><a class="code" href="structmap__node__stat.html">map_node_stat</a> *st;
00074 <span class="keyword">struct </span><a class="code" href="structmap__node__int64.html">map_node_int64</a> *ptr;
00075
00076 <a class="code" href="probes_8c.html#a1">_stp_unregister_jprobes</a> (dtr_probes, MAX_DTR_ROUTINE);
00077
00078 <span class="keywordflow">for</span> (ptr = (<span class="keyword">struct</span> <a class="code" href="structmap__node__int64.html">map_node_int64</a> *)<a class="code" href="map_8c.html#a6">_stp_map_start</a>(opens); ptr;
00079 ptr = (<span class="keyword">struct</span> <a class="code" href="structmap__node__int64.html">map_node_int64</a> *)_stp_map_iter (opens,(<span class="keyword">struct</span> <a class="code" href="structmap__node.html">map_node</a> *)ptr))
00080 dlog ("opens[%s] = %lld\n", key1str(ptr), ptr->val);
00081 dlog ("\n");
00082
00083 for (st = (struct <a class="code" href="structmap__node__stat.html">map_node_stat</a> *)_stp_map_start(reads); st;
00084 st = (struct <a class="code" href="structmap__node__stat.html">map_node_stat</a> *)_stp_map_iter (reads,(struct <a class="code" href="structmap__node.html">map_node</a> *)st))
00085 dlog ("reads[%s] = [count=%lld sum=%lld min=%lld max=%lld]\n", key1str(st), st->stats.count, st->stats.sum,
00086 st->stats.min, st->stats.max);
00087 dlog ("\n");
00088
00089 for (st = (struct <a class="code" href="structmap__node__stat.html">map_node_stat</a> *)_stp_map_start(writes); st;
00090 st = (struct <a class="code" href="structmap__node__stat.html">map_node_stat</a> *)_stp_map_iter (writes,(struct <a class="code" href="structmap__node.html">map_node</a> *)st))
00091 dlog ("writes[%s] = [count=%lld sum=%lld min=%lld max=%lld]\n", key1str(st), st->stats.count, st->stats.sum,
00092 st->stats.min, st->stats.max);
00093 dlog ("\n");
00094
00095 _stp_map_del (opens);
00096 _stp_map_del (reads);
00097 _stp_map_del (writes);
00098
00099 dlog("EXIT\n");
00100 }
00101
00102 module_init(init_dtr);
00103 module_exit(cleanup_dtr);
00104 MODULE_LICENSE("GPL");
00105
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Generated on Tue Mar 22 10:27:36 2005 for SystemTap.</small></body>
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