Import stripped Arm GNU Toolchain 13.2.Rel1HEAD umineko

https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads Change-Id: I7303388733328cd98ab9aa3c30236db67f2e9e9c
author: alk3pInjection <webmaster@raspii.tech> 2024-02-04 16:16:35 +0800
committer: alk3pInjection <webmaster@raspii.tech> 2024-02-04 16:16:35 +0800
commit: abdaadbcae30fe0c9a66c7516798279fdfd97750 (patch)
tree: 00a54a6e25601e43876d03c1a4a12a749d4a914c /share/doc/gdb/Command-aliases-default-args.html
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+<title>Debugging with GDB: Command aliases default args</title>
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+<a name="Command-aliases-default-args"></a>
+<div class="header">
+<p>
+Up: <a href="Aliases.html#Aliases" accesskey="u" rel="up">Aliases</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
+</div>
+<hr>
+<a name="Default-Arguments"></a>
+<h4 class="subsection">23.2.1 Default Arguments</h4>
+<a name="index-aliases-for-commands_002c-default-arguments"></a>
+
+<p>You can tell <small>GDB</small> to always prepend some default arguments to
+the list of arguments provided explicitly by the user when using a
+user-defined alias.
+</p>
+<p>If you repeatedly use the same arguments or options for a command, you
+can define an alias for this command and tell <small>GDB</small> to
+automatically prepend these arguments or options to the list of
+arguments you type explicitly when using the alias<a name="DOCF18" href="#FOOT18"><sup>18</sup></a>.
+</p>
+<p>For example, if you often use the command <code>thread apply all</code>
+specifying to work on the threads in ascending order and to continue in case it
+encounters an error, you can tell <small>GDB</small> to automatically preprend
+the <code>-ascending</code> and <code>-c</code> options by using:
+</p>
+<div class="smallexample">
+<pre class="smallexample">(gdb) alias thread apply asc-all = thread apply all -ascending -c
+</pre></div>
+
+<p>Once you have defined this alias with its default args, any time you type
+the <code>thread apply asc-all</code> followed by <code>some arguments</code>,
+<small>GDB</small> will execute  <code>thread apply all -ascending -c some arguments</code>.
+</p>
+<p>To have even less to type, you can also define a one word alias:
+</p><div class="smallexample">
+<pre class="smallexample">(gdb) alias t_a_c = thread apply all -ascending -c
+</pre></div>
+
+<p>As usual, unambiguous abbreviations can be used for <var>alias</var>
+and <var>default-args</var>.
+</p>
+<p>The different aliases of a command do not share their default args.
+For example, you define a new alias <code>bt_ALL</code> showing all possible
+information and another alias <code>bt_SMALL</code> showing very limited information
+using:
+</p><div class="smallexample">
+<pre class="smallexample">(gdb) alias bt_ALL = backtrace -entry-values both -frame-arg all \
+   -past-main -past-entry -full
+(gdb) alias bt_SMALL = backtrace -entry-values no -frame-arg none \
+   -past-main off -past-entry off
+</pre></div>
+
+<p>(For more on using the <code>alias</code> command, see <a href="Aliases.html#Aliases">Aliases</a>.)
+</p>
+<p>Default args are not limited to the arguments and options of <var>command</var>,
+but can specify nested commands if <var>command</var> accepts such a nested command
+as argument.
+For example, the below defines <code>faalocalsoftype</code> that lists the
+frames having locals of a certain type, together with the matching
+local vars:
+</p><div class="smallexample">
+<pre class="smallexample">(gdb) alias faalocalsoftype = frame apply all info locals -q -t
+(gdb) faalocalsoftype int
+#1  0x55554f5e in sleeper_or_burner (v=0xdf50) at sleepers.c:86
+i = 0
+ret = 21845
+</pre></div>
+
+<p>This is also very useful to define an alias for a set of nested <code>with</code>
+commands to have a particular combination of temporary settings.  For example,
+the below defines the alias <code>pp10</code> that pretty prints an expression
+argument, with a maximum of 10 elements if the expression is a string or
+an array:
+</p><div class="smallexample">
+<pre class="smallexample">(gdb) alias pp10 = with print pretty -- with print elements 10 -- print
+</pre></div>
+<p>This defines the alias  <code>pp10</code> as being a sequence of 3 commands.
+The first part <code>with print pretty --</code> temporarily activates the setting
+<code>set print pretty</code>, then launches the command that follows the separator
+<code>--</code>.
+The command following the first part is also a <code>with</code> command that
+temporarily changes the setting <code>set print elements</code> to 10, then
+launches the command that follows the second separator <code>--</code>.
+The third part <code>print</code> is the command the <code>pp10</code> alias will launch,
+using the temporary values of the settings and the arguments explicitly given
+by the user.
+For more information about the <code>with</code> command usage,
+see <a href="Command-Settings.html#Command-Settings">Command Settings</a>.
+</p>
+<p>By default, asking the help for an alias shows the documentation of
+the aliased command.  When the alias is a set of nested commands, <code>help</code>
+of an alias shows the documentation of the first command.  This help
+is not particularly useful for an alias such as <code>pp10</code>.
+For such an alias, it is useful to give a specific documentation
+using the <code>document</code> command (see <a href="Define.html#Define">document</a>).
+</p>
+
+
+<div class="footnote">
+<hr>
+<h4 class="footnotes-heading">Footnotes</h4>
+
+<h3><a name="FOOT18" href="#DOCF18">(18)</a></h3>
+<p><small>GDB</small>
+could easily accept default arguments for pre-defined commands and aliases,
+but it was deemed this would be confusing, and so is not allowed.</p>
+</div>
+<hr>
+<div class="header">
+<p>
+Up: <a href="Aliases.html#Aliases" accesskey="u" rel="up">Aliases</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
+</div>
+
+
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author	alk3pInjection <webmaster@raspii.tech>	2024-02-04 16:16:35 +0800
committer	alk3pInjection <webmaster@raspii.tech>	2024-02-04 16:16:35 +0800
commit	abdaadbcae30fe0c9a66c7516798279fdfd97750 (patch)
tree	00a54a6e25601e43876d03c1a4a12a749d4a914c /share/doc/gdb/Command-aliases-default-args.html