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2 | Mathieu Desnoyers -- September 2005 |
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4 | The 'genevent' program parses event descriptions and generates |
5 | the inline functions to record events in the kernel. |
6 | |
7 | Right now, the program can only parse simple structure, if a |
8 | structure has a nested structure, it will not work. |
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10 | Genevent will soon go through a rewrite, but for now, the strings should be put |
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11 | *** AT THE END *** of a structure : they will be put there anyways. |
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13 | There are several files in the directory: |
14 | genevent.c, genevent.h, crc32.tab, parser.c and parser.h |
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16 | In fact, crc32.tab, parser.c and parser.h are the same files as |
17 | those in LTT library. |
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19 | 'core.xml' is an example event description file. |
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21 | Here is a brief description of how to use genevent. |
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23 | make |
24 | make install |
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26 | |
27 | * Add new events to the kernel with genevent |
28 | |
29 | su - |
30 | cd /usr/local/share/LinuxTraceToolkitViewer/facilities |
31 | cp process.xml yourfacility.xml |
32 | * edit yourfacility.xml to fit your needs. |
33 | cd /tmp |
34 | /usr/local/bin/genevent /usr/local/share/LinuxTraceToolkitViewer/yourfacility.xml |
35 | cp ltt-facility-yourfacility.h ltt-facility-id-yourfacility.h \ |
36 | /usr/src/linux-2.6.12-rc4-mm2-lttng-0.2/include/linux/ltt |
37 | cp ltt-facility-loader-yourfacility.c ltt-facility-loader-yourfacility.h \ |
38 | /usr/src/linux-2.6.12-rc4-mm2-lttng-0.2/ltt |
39 | * edit the kernel file you want to instrument |
40 | - Add #include <linux/ltt/ltt-facility-yourfacility.h> at the beginning |
41 | of the file. |
42 | - Add a call to the tracing functions. See their names and parameters in |
43 | /usr/src/linux-2.6.12-rc4-mm2-lttng-0.2/include/linux/ltt/ltt-facility-yourfacility.h |
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