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comparison xml/en/docs/nginx_dtrace_pid_provider.xml @ 2746:438e5c551d67

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Fixed name of the ngx_http_request_t structure in DTrace article.
author Maxim Dounin <mdounin@mdounin.ru>
date Thu, 01 Jul 2021 11:27:14 +0300
parents f024ac0ec5c7
children cfdc1ba95196
comparison
equal deleted inserted replaced
2745:febebaf5e52f 2746:438e5c551d67
7 <!DOCTYPE article SYSTEM "../../../dtd/article.dtd"> 7 <!DOCTYPE article SYSTEM "../../../dtd/article.dtd">
8 8
9 <article name="Debugging nginx with DTrace pid provider" 9 <article name="Debugging nginx with DTrace pid provider"
10 link="/en/docs/nginx_dtrace_pid_provider.html" 10 link="/en/docs/nginx_dtrace_pid_provider.html"
11 lang="en" 11 lang="en"
12 rev="3" 12 rev="4"
13 toc="no"> 13 toc="no">
14 14
15 <section> 15 <section>
16 16
17 <para> 17 <para>
72 72
73 </para> 73 </para>
74 74
75 <para> 75 <para>
76 It should be noted that in the example above DTrace requires some knowledge 76 It should be noted that in the example above DTrace requires some knowledge
77 about the <literal>ngx_http_process_request</literal> structure. 77 about the <literal>ngx_http_request_t</literal> structure.
78 Unfortunately while it is possible to use a specific <literal>#include</literal> 78 Unfortunately while it is possible to use a specific <literal>#include</literal>
79 directive in the DTrace script and then pass it to a C preprocessor 79 directive in the DTrace script and then pass it to a C preprocessor
80 (with the <literal>-C</literal> flag), that doesn’t really work. 80 (with the <literal>-C</literal> flag), that doesn’t really work.
81 Due to a lot of cross dependencies, almost all nginx header files 81 Due to a lot of cross dependencies, almost all nginx header files
82 have to be included. 82 have to be included.
113 These definitions are compact, commonly used and unlikely to be 113 These definitions are compact, commonly used and unlikely to be
114 frequently changed. 114 frequently changed.
115 </para> 115 </para>
116 116
117 <para> 117 <para>
118 Then there’s the <literal>ngx_http_process_request_t</literal> structure that 118 Then there’s the <literal>ngx_http_request_t</literal> structure that
119 contains a lot of pointers to other structures. 119 contains a lot of pointers to other structures.
120 Because these pointers are really irrelevant to this script, and because they 120 Because these pointers are really irrelevant to this script, and because they
121 have the same size, it is possible to just replace them with void pointers. 121 have the same size, it is possible to just replace them with void pointers.
122 Instead of changing definitions, it is better to add appropriate typedefs, 122 Instead of changing definitions, it is better to add appropriate typedefs,
123 though: 123 though: