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1 | |
| 2 | Mathieu Desnoyers -- September 2005 |
| 3 | |
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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. |
| 9 | |
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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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12 | |
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13 | There are several files in the directory: |
| 14 | genevent.c, genevent.h, crc32.tab, parser.c and parser.h |
| 15 | |
| 16 | In fact, crc32.tab, parser.c and parser.h are the same files as |
| 17 | those in LTT library. |
| 18 | |
| 19 | 'core.xml' is an example event description file. |
| 20 | |
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21 | Here is a brief description of how to use genevent. |
| 22 | |
| 23 | make |
| 24 | make install |
| 25 | |
| 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 |
| 44 | |
| 45 | |
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