php-fpm执行流程源码浅析
作者:zhanhailiang 日期:2015-03-09
sapi\fpm\fpm\fpm_main.c:@main;
-
fcgi_init()->fcgi_setup_signals(); 设置信号处理方法;
sigaction(SIGUSR1, &new_sa, NULL);
sigaction(SIGTERM, &new_sa, NULL);
sigaction(SIGPIPE, NULL, &old_sa); -
sapi_startup(&cgi_sapi_module);
->sapi_globals_ctor(&sapi_globals); 初始化全局变量;
->reentrancy_startup(); -
fcgi_fd = fpm_run(&max_requests); 进程初始化,调用fork()创建进程
-
fcgi_init_request(&request, fcgi_fd); 请求初始化;
-
while (fcgi_accept_request(&request) >= 0) {
5.1. init_request_info; 请求初始化; SG(request_info), SG(sapi_headers)
5.2. fpm_request_info();
5.3. php_request_startup(TSRMLS_C);
-> php_start_sapi(); 请求全局变量初始化;
-> sapi_activate(TSRMLS_C); 请求HTTP头信息初始化;
-> php_hash_environment(TSRMLS_C); 请求环境变量初始倾听; 如$_GET,$_POST,$_ENV,$_SERVER,$_COOKIE,$_FILES就是在这步实始化; $_REQUEST根据jit_initialization判断是否需要实时初始化;
5.4. fpm_status_handle_request(TSRMLS_C);
5.5. php_fopen_primary_script(&file_handle TSRMLS_CC); 打开脚本;
5.5. fpm_request_executing();
5.7. php_execute_script(&file_handle TSRMLS_CC); 执行脚本;
5.8. fpm_request_end(TSRMLS_C);
5.9. php_request_shutdown((void *) 0); 请求结束, 释放请求生命周期中申请的资源; -
fcgi_shutdown(); 释放申请的持久化资源

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