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<h1>probes.c</h1><div class="fragment"><pre class="fragment">00001 <span class="comment">/* -*- linux-c -*- */</span>
00002 <span class="comment"></span>
00003 <span class="comment">/** Create a new map.</span>
00004 <span class="comment"> * Maps must be created at module initialization time.</span>
00005 <span class="comment"> * @param max_entries The maximum number of entries allowed. Currently that </span>
00006 <span class="comment"> * will be allocated dynamically.</span>
00007 <span class="comment"> * @param type Type of values stored in this map. </span>
00008 <span class="comment"> * @return A MAP on success or NULL on failure.</span>
00009 <span class="comment"> */</span>
00010
00011
00012 <span class="keyword">static</span> <span class="keywordtype">unsigned</span> long (*_stp_lookup_name)(<span class="keywordtype">char</span> *name)=(<span class="keywordtype">void</span> *)KALLSYMS_LOOKUP_NAME;
00013
00014 <span class="keywordtype">void</span> _stp_unregister_jprobes (<span class="keyword">struct</span> jprobe *probes, <span class="keywordtype">int</span> num_probes)
00015 {
00016 <span class="keywordtype">int</span> i;
00017 <span class="keywordflow">for</span> (i = 0; i < num_probes; i++)
00018 unregister_jprobe(&probes[i]);
00019 dlog ("All jprobes removed\n");
00020 }
00021
00022 <span class="keywordtype">int</span> _stp_register_jprobes (struct jprobe *probes, <span class="keywordtype">int</span> num_probes)
00023 {
00024 <span class="keywordtype">int</span> i, ret ;
00025 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> addr;
00026
00027 <span class="keywordflow">for</span> (i = 0; i < num_probes; i++) {
00028 addr =_stp_lookup_name((<span class="keywordtype">char</span> *)probes[i].kp.addr);
00029 <span class="keywordflow">if</span> (addr == 0) {
00030 dlog (<span class="stringliteral">"ERROR: function %s not found!\n"</span>,
00031 (<span class="keywordtype">char</span> *)probes[i].kp.addr);
00032 ret = -1; <span class="comment">/* FIXME */</span>
00033 <span class="keywordflow">goto</span> out;
00034 }
00035 dlog(<span class="stringliteral">"inserting jprobe at %s (%p)\n"</span>, probes[i].kp.addr, addr);
00036 probes[i].kp.addr = (kprobe_opcode_t *)addr;
00037 ret = register_jprobe(&probes[i]);
00038 <span class="keywordflow">if</span> (ret)
00039 goto out;
00040 }
00041 return 0;
00042 out:
00043 dlog ("probe module initialization failed. Exiting...\n");
00044 _stp_unregister_jprobes(probes, i);
00045 return ret;
00046 }
00047
00048 <span class="keywordtype">void</span> _stp_unregister_kprobes (struct kprobe *probes, <span class="keywordtype">int</span> num_probes)
00049 {
00050 <span class="keywordtype">int</span> i;
00051 <span class="keywordflow">for</span> (i = 0; i < num_probes; i++)
00052 unregister_kprobe(&probes[i]);
00053 dlog ("All kprobes removed\n");
00054 }
00055
00056 <span class="keywordtype">int</span> _stp_register_kprobes (struct kprobe *probes, <span class="keywordtype">int</span> num_probes)
00057 {
00058 <span class="keywordtype">int</span> i, ret ;
00059 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> addr;
00060
00061 <span class="keywordflow">for</span> (i = 0; i < num_probes; i++) {
00062 addr =_stp_lookup_name((<span class="keywordtype">char</span> *)probes[i].addr);
00063 <span class="keywordflow">if</span> (addr == 0) {
00064 dlog (<span class="stringliteral">"ERROR: function %s not found!\n"</span>,
00065 (<span class="keywordtype">char</span> *)probes[i].addr);
00066 ret = -1; <span class="comment">/* FIXME */</span>
00067 <span class="keywordflow">goto</span> out;
00068 }
00069 dlog(<span class="stringliteral">"inserting kprobe at %s (%p)\n"</span>, probes[i].addr, addr);
00070 probes[i].addr = (kprobe_opcode_t *)addr;
00071 ret = register_kprobe(&probes[i]);
00072 <span class="keywordflow">if</span> (ret)
00073 goto out;
00074 }
00075 return 0;
00076 out:
00077 dlog ("probe module initialization failed. Exiting...\n");
00078 _stp_unregister_kprobes(probes, i);
00079 return ret;
00080 }
00081
</pre></div><hr size="1"><address style="align: right;"><small>
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