How to integrate snappy into xhprof in php
Object introduction
xhprof: PHP performance analysis tool, a PHP extension developed by Facebook, which can record the function/class method call chain during the running of PHP scripts, as well as the time consumed by each call, memory usage and other data;
snappy: A string compression/decompression tool developed by Google. The advantage is fast compression speed.
Goal
Provide two PHP functions xhprof_compress($str) and xhprof_uncompress($str) in the xhprof extension to implement compression and decompression functions.
Specific process
1. Download the xhprof source code to php-5.6.24/ext/xhprof
2. Follow the normal way./configure, make, make sure xhprof.so is working properly
3. Download the snappy source code to php-5.6.24 /ext/xhprof/snappy
4. Edit the file php-5.6.24/ext/xhprof/php_xhprof.h and add the following lines:
...
PHP_FUNCTION(xhprof_compress);
PHP_FUNCTION(xhprof_uncompress);
...
5. Edit the file php-5.6.24/ext/xhprof/xhprof.c and add the following line:
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The above code is not original and is taken from snappy’s PHP extension: php-ext-snappy
6. Edit config. The m4 file specifies the compilation method of snappy. The complete config.m4 code is as follows. Snappy will be edited directly into xhprof.so. A better way would be to first check whether snappy is installed on the current host. If so, specify the link library path, so there is no need to compile snappy related functions into xhprof.so.
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7. After re-executing phpize, execute make to generate a new xhprof.so
8. Execute the command nm xhprof.so to view snappy related information Whether the function has been compiled successfully, as shown below, the memory addresses of _snappy_compress, _snappy_uncompress, etc. are all non-empty, indicating that they have been compiled into xhprof.so.
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