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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 <span class="preprocessor">#include <linux/module.h></span>
00005 <span class="preprocessor">#include <linux/interrupt.h></span>
00006 <span class="preprocessor">#include <net/sock.h></span>
00007
00008 <span class="preprocessor">#include "<a class="code" href="runtime_8h.html">runtime.h</a>"</span>
00009 <span class="preprocessor">#include "<a class="code" href="io_8c.html">io.c</a>"</span>
00010 <span class="preprocessor">#include "<a class="code" href="map_8c.html">map.c</a>"</span>
00011 <span class="preprocessor">#include "<a class="code" href="probes_8c.html">probes.c</a>"</span>
00012 <span class="preprocessor">#include "<a class="code" href="stack_8c.html">stack.c</a>"</span>
00013
00014 MODULE_DESCRIPTION(<span class="stringliteral">"SystemTap probe: test4"</span>);
00015 MODULE_AUTHOR(<span class="stringliteral">"Martin Hunt <hunt@redhat.com>"</span>);
00016
00017 <span class="keyword">static</span> <span class="keywordtype">char</span> tbuffer[2][50000];
00018 <span class="keyword">static</span> <span class="keywordtype">void</span> stp_helper(<span class="keywordtype">void</span> *);
00019 <span class="keyword">static</span> DECLARE_WORK(stp_work, stp_helper, tbuffer);
00020
00021 <a class="code" href="structmap__root.html">MAP</a> opens, reads, writes, traces;
00022 <span class="keyword">static</span> <span class="keywordtype">int</span> bufcount = 0;
00023
00024 <span class="keyword">static</span> <span class="keywordtype">void</span> stp_helper (<span class="keywordtype">void</span> *data)
00025 {
00026 <a class="code" href="group__io.html#ga0">dlog</a> (<span class="stringliteral">"HELPER\n"</span>);
00027 }
00028
00029 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)
00030 {
00031 <a class="code" href="group__maps.html#ga12">_stp_map_key_str</a> (opens, current->comm);
00032 <a class="code" href="group__maps.html#ga17">_stp_map_add_int64</a> (opens, 1);
00033 jprobe_return();
00034 <span class="keywordflow">return</span> 0;
00035 }
00036
00037 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)
00038 {
00039 <a class="code" href="group__maps.html#ga12">_stp_map_key_str</a> (reads, current->comm);
00040 <a class="code" href="group__maps.html#ga23">_stp_map_stat_add</a> (reads, count);
00041 jprobe_return();
00042 <span class="keywordflow">return</span> 0;
00043 }
00044
00045 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)
00046 {
00047 <a class="code" href="group__maps.html#ga12">_stp_map_key_str</a> (writes, current->comm);
00048 <a class="code" href="group__maps.html#ga23">_stp_map_stat_add</a> (writes, count);
00049 jprobe_return();
00050 <span class="keywordflow">return</span> 0;
00051 }
00052
00053 <span class="keywordtype">int</span> inst_show_cpuinfo(<span class="keyword">struct</span> seq_file *m, <span class="keywordtype">void</span> *v)
00054 {
00055 _stp_stack_print (0,0);
00056 _stp_stack_print (1,0);
00057
00058 <a class="code" href="group__scbuf.html#ga4">_stp_scbuf_clear</a>();
00059 <a class="code" href="group__lists.html#ga5">_stp_list_add</a> (traces, _stp_stack_sprint(0,0));
00060 <span class="keywordflow">if</span> (bufcount++ == 0)
00061 schedule_work (&stp_work);
00062
00063 jprobe_return();
00064 return 0;
00065 }
00066
00067
00068 static struct jprobe dtr_probes[] = {
00069 {
00070 .kp.addr = (kprobe_opcode_t *)<span class="stringliteral">"sys_open"</span>,
00071 .entry = (kprobe_opcode_t *) inst_sys_open
00072 },
00073 {
00074 .kp.addr = (kprobe_opcode_t *)<span class="stringliteral">"sys_read"</span>,
00075 .entry = (kprobe_opcode_t *) inst_sys_read
00076 },
00077 {
00078 .kp.addr = (kprobe_opcode_t *)<span class="stringliteral">"sys_write"</span>,
00079 .entry = (kprobe_opcode_t *) inst_sys_write
00080 },
00081 {
00082 .kp.addr = (kprobe_opcode_t *)<span class="stringliteral">"show_cpuinfo"</span>,
00083 .entry = (kprobe_opcode_t *) inst_show_cpuinfo,
00084 },
00085 };
00086
00087 <span class="preprocessor">#define MAX_DTR_ROUTINE (sizeof(dtr_probes)/sizeof(struct jprobe))</span>
00088 <span class="preprocessor"></span>
00089 <span class="keyword">static</span> <span class="keywordtype">int</span> init_dtr(<span class="keywordtype">void</span>)
00090 {
00091 <span class="keywordtype">int</span> ret;
00092
00093 opens = <a class="code" href="group__maps.html#ga2">_stp_map_new</a> (1000, INT64);
00094 reads = <a class="code" href="group__maps.html#ga2">_stp_map_new</a> (1000, STAT);
00095 writes = <a class="code" href="group__maps.html#ga2">_stp_map_new</a> (1000, STAT);
00096 traces = <a class="code" href="group__lists.html#ga0">_stp_list_new</a> (1000, STRING);
00097
00098 ret = <a class="code" href="probes_8c.html#a2">_stp_register_jprobes</a> (dtr_probes, MAX_DTR_ROUTINE);
00099
00100 <a class="code" href="group__io.html#ga0">dlog</a>(<span class="stringliteral">"instrumentation is enabled...\n"</span>);
00101 <span class="keywordflow">return</span> ret;
00102
00103 }
00104
00105 <span class="keyword">static</span> <span class="keywordtype">void</span> cleanup_dtr(<span class="keywordtype">void</span>)
00106 {
00107 <span class="keyword">struct </span><a class="code" href="structmap__node__stat.html">map_node_stat</a> *st;
00108 <span class="keyword">struct </span><a class="code" href="structmap__node__int64.html">map_node_int64</a> *ptr;
00109 <span class="keyword">struct </span><a class="code" href="structmap__node__str.html">map_node_str</a> *sptr;
00110
00111 <a class="code" href="probes_8c.html#a1">_stp_unregister_jprobes</a> (dtr_probes, MAX_DTR_ROUTINE);
00112
00113 <a class="code" href="group__maps.html#ga31">foreach</a> (traces, sptr)
00114 dlog ("trace: %s\n", sptr->str);
00115
00116 foreach (opens, ptr)
00117 dlog ("opens[%s] = %lld\n", key1str(ptr), ptr->val);
00118 dlog ("\n");
00119
00120 foreach (reads, st)
00121 dlog ("reads[%s] = [count=%lld sum=%lld min=%lld max=%lld]\n", key1str(st),
00122 st->stats.count, st->stats.sum, st->stats.min, st->stats.max);
00123 dlog ("\n");
00124
00125 foreach (writes, st)
00126 dlog ("writes[%s] = [count=%lld sum=%lld min=%lld max=%lld]\n", key1str(st),
00127 st->stats.count, st->stats.sum, st->stats.min, st->stats.max);
00128 dlog ("\n");
00129
00130 _stp_map_del (opens);
00131 _stp_map_del (reads);
00132 _stp_map_del (writes);
00133
00134 dlog("EXIT\n");
00135 }
00136
00137 module_init(init_dtr);
00138 module_exit(cleanup_dtr);
00139 MODULE_LICENSE("GPL");
00140
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