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| author | alk3pInjection <webmaster@raspii.tech> | 2024-02-04 16:16:35 +0800 |
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| committer | alk3pInjection <webmaster@raspii.tech> | 2024-02-04 16:16:35 +0800 |
| commit | abdaadbcae30fe0c9a66c7516798279fdfd97750 (patch) | |
| tree | 00a54a6e25601e43876d03c1a4a12a749d4a914c /share/doc/gccint/Profiling.html | |
https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads
Change-Id: I7303388733328cd98ab9aa3c30236db67f2e9e9c
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| -rw-r--r-- | share/doc/gccint/Profiling.html | 140 |
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diff --git a/share/doc/gccint/Profiling.html b/share/doc/gccint/Profiling.html new file mode 100644 index 0000000..4bac2d2 --- /dev/null +++ b/share/doc/gccint/Profiling.html @@ -0,0 +1,140 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<!-- Copyright (C) 1988-2023 Free Software Foundation, Inc. + +Permission is granted to copy, distribute and/or modify this document +under the terms of the GNU Free Documentation License, Version 1.3 or +any later version published by the Free Software Foundation; with the +Invariant Sections being "Funding Free Software", the Front-Cover +Texts being (a) (see below), and with the Back-Cover Texts being (b) +(see below). A copy of the license is included in the section entitled +"GNU Free Documentation License". + +(a) The FSF's Front-Cover Text is: + +A GNU Manual + +(b) The FSF's Back-Cover Text is: + +You have freedom to copy and modify this GNU Manual, like GNU + software. Copies published by the Free Software Foundation raise + funds for GNU development. --> +<!-- Created by GNU Texinfo 5.1, http://www.gnu.org/software/texinfo/ --> +<head> +<title>GNU Compiler Collection (GCC) Internals: Profiling</title> + +<meta name="description" content="GNU Compiler Collection (GCC) Internals: Profiling"> +<meta name="keywords" content="GNU Compiler Collection (GCC) Internals: Profiling"> +<meta name="resource-type" content="document"> +<meta name="distribution" content="global"> +<meta name="Generator" content="makeinfo"> +<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> +<link href="index.html#Top" rel="start" title="Top"> +<link href="Option-Index.html#Option-Index" rel="index" title="Option Index"> +<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> +<link href="Stack-and-Calling.html#Stack-and-Calling" rel="up" title="Stack and Calling"> +<link href="Tail-Calls.html#Tail-Calls" rel="next" title="Tail Calls"> +<link href="Function-Entry.html#Function-Entry" rel="previous" title="Function Entry"> +<style type="text/css"> +<!-- +a.summary-letter {text-decoration: none} +blockquote.smallquotation {font-size: smaller} +div.display {margin-left: 3.2em} +div.example {margin-left: 3.2em} +div.indentedblock {margin-left: 3.2em} +div.lisp {margin-left: 3.2em} +div.smalldisplay {margin-left: 3.2em} +div.smallexample {margin-left: 3.2em} +div.smallindentedblock {margin-left: 3.2em; font-size: smaller} +div.smalllisp {margin-left: 3.2em} +kbd {font-style:oblique} +pre.display {font-family: inherit} +pre.format {font-family: inherit} +pre.menu-comment {font-family: serif} +pre.menu-preformatted {font-family: serif} +pre.smalldisplay {font-family: inherit; font-size: smaller} +pre.smallexample {font-size: smaller} +pre.smallformat {font-family: inherit; font-size: smaller} +pre.smalllisp {font-size: smaller} +span.nocodebreak {white-space:nowrap} +span.nolinebreak {white-space:nowrap} +span.roman {font-family:serif; font-weight:normal} +span.sansserif {font-family:sans-serif; font-weight:normal} +ul.no-bullet {list-style: none} +--> +</style> + + +</head> + +<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000"> +<a name="Profiling"></a> +<div class="header"> +<p> +Next: <a href="Tail-Calls.html#Tail-Calls" accesskey="n" rel="next">Tail Calls</a>, Previous: <a href="Function-Entry.html#Function-Entry" accesskey="p" rel="previous">Function Entry</a>, Up: <a href="Stack-and-Calling.html#Stack-and-Calling" accesskey="u" rel="up">Stack and Calling</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p> +</div> +<hr> +<a name="Generating-Code-for-Profiling"></a> +<h4 class="subsection">18.9.12 Generating Code for Profiling</h4> +<a name="index-profiling_002c-code-generation"></a> + +<p>These macros will help you generate code for profiling. +</p> +<dl> +<dt><a name="index-FUNCTION_005fPROFILER"></a>Macro: <strong>FUNCTION_PROFILER</strong> <em>(<var>file</var>, <var>labelno</var>)</em></dt> +<dd><p>A C statement or compound statement to output to <var>file</var> some +assembler code to call the profiling subroutine <code>mcount</code>. +</p> +<a name="index-mcount"></a> +<p>The details of how <code>mcount</code> expects to be called are determined by +your operating system environment, not by GCC. To figure them out, +compile a small program for profiling using the system’s installed C +compiler and look at the assembler code that results. +</p> +<p>Older implementations of <code>mcount</code> expect the address of a counter +variable to be loaded into some register. The name of this variable is +‘<samp>LP</samp>’ followed by the number <var>labelno</var>, so you would generate +the name using ‘<samp>LP%d</samp>’ in a <code>fprintf</code>. +</p></dd></dl> + +<dl> +<dt><a name="index-PROFILE_005fHOOK"></a>Macro: <strong>PROFILE_HOOK</strong></dt> +<dd><p>A C statement or compound statement to output to <var>file</var> some assembly +code to call the profiling subroutine <code>mcount</code> even the target does +not support profiling. +</p></dd></dl> + +<dl> +<dt><a name="index-NO_005fPROFILE_005fCOUNTERS"></a>Macro: <strong>NO_PROFILE_COUNTERS</strong></dt> +<dd><p>Define this macro to be an expression with a nonzero value if the +<code>mcount</code> subroutine on your system does not need a counter variable +allocated for each function. This is true for almost all modern +implementations. If you define this macro, you must not use the +<var>labelno</var> argument to <code>FUNCTION_PROFILER</code>. +</p></dd></dl> + +<dl> +<dt><a name="index-PROFILE_005fBEFORE_005fPROLOGUE"></a>Macro: <strong>PROFILE_BEFORE_PROLOGUE</strong></dt> +<dd><p>Define this macro if the code for function profiling should come before +the function prologue. Normally, the profiling code comes after. +</p></dd></dl> + +<dl> +<dt><a name="index-TARGET_005fKEEP_005fLEAF_005fWHEN_005fPROFILED"></a>Target Hook: <em>bool</em> <strong>TARGET_KEEP_LEAF_WHEN_PROFILED</strong> <em>(void)</em></dt> +<dd><p>This target hook returns true if the target wants the leaf flag for +the current function to stay true even if it calls mcount. This might +make sense for targets using the leaf flag only to determine whether a +stack frame needs to be generated or not and for which the call to +mcount is generated before the function prologue. +</p></dd></dl> + +<hr> +<div class="header"> +<p> +Next: <a href="Tail-Calls.html#Tail-Calls" accesskey="n" rel="next">Tail Calls</a>, Previous: <a href="Function-Entry.html#Function-Entry" accesskey="p" rel="previous">Function Entry</a>, Up: <a href="Stack-and-Calling.html#Stack-and-Calling" accesskey="u" rel="up">Stack and Calling</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p> +</div> + + + +</body> +</html> |