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<title>Debugging with GDB: Lazy Strings In Python</title>
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<a name="Lazy-Strings-In-Python"></a>
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<p>
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Next: <a href="Architectures-In-Python.html#Architectures-In-Python" accesskey="n" rel="next">Architectures In Python</a>, Previous: <a href="Finish-Breakpoints-in-Python.html#Finish-Breakpoints-in-Python" accesskey="p" rel="previous">Finish Breakpoints in Python</a>, Up: <a href="Python-API.html#Python-API" accesskey="u" rel="up">Python API</a> [<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>
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<a name="Python-representation-of-lazy-strings"></a>
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<h4 class="subsubsection">23.2.2.32 Python representation of lazy strings</h4>
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<a name="index-lazy-strings-in-python"></a>
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<a name="index-gdb_002eLazyString"></a>
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<p>A <em>lazy string</em> is a string whose contents is not retrieved or
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encoded until it is needed.
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</p>
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<p>A <code>gdb.LazyString</code> is represented in <small>GDB</small> as an
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<code>address</code> that points to a region of memory, an <code>encoding</code>
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that will be used to encode that region of memory, and a <code>length</code>
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to delimit the region of memory that represents the string. The
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difference between a <code>gdb.LazyString</code> and a string wrapped within
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a <code>gdb.Value</code> is that a <code>gdb.LazyString</code> will be treated
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differently by <small>GDB</small> when printing. A <code>gdb.LazyString</code> is
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retrieved and encoded during printing, while a <code>gdb.Value</code>
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wrapping a string is immediately retrieved and encoded on creation.
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</p>
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<p>A <code>gdb.LazyString</code> object has the following functions:
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</p>
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<dl>
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<dt><a name="index-LazyString_002evalue"></a>Function: <strong>LazyString.value</strong> <em>()</em></dt>
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<dd><p>Convert the <code>gdb.LazyString</code> to a <code>gdb.Value</code>. This value
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will point to the string in memory, but will lose all the delayed
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retrieval, encoding and handling that <small>GDB</small> applies to a
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<code>gdb.LazyString</code>.
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</p></dd></dl>
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<dl>
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<dt><a name="index-LazyString_002eaddress"></a>Variable: <strong>LazyString.address</strong></dt>
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<dd><p>This attribute holds the address of the string. This attribute is not
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writable.
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</p></dd></dl>
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<dl>
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<dt><a name="index-LazyString_002elength"></a>Variable: <strong>LazyString.length</strong></dt>
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<dd><p>This attribute holds the length of the string in characters. If the
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length is -1, then the string will be fetched and encoded up to the
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first null of appropriate width. This attribute is not writable.
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</p></dd></dl>
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<dl>
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<dt><a name="index-LazyString_002eencoding"></a>Variable: <strong>LazyString.encoding</strong></dt>
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<dd><p>This attribute holds the encoding that will be applied to the string
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when the string is printed by <small>GDB</small>. If the encoding is not
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set, or contains an empty string, then <small>GDB</small> will select the
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most appropriate encoding when the string is printed. This attribute
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is not writable.
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</p></dd></dl>
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<dl>
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<dt><a name="index-LazyString_002etype"></a>Variable: <strong>LazyString.type</strong></dt>
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<dd><p>This attribute holds the type that is represented by the lazy string’s
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type. For a lazy string this is a pointer or array type. To
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resolve this to the lazy string’s character type, use the type’s
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<code>target</code> method. See <a href="Types-In-Python.html#Types-In-Python">Types In Python</a>. This attribute is not
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writable.
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</p></dd></dl>
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<hr>
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<div class="header">
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<p>
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Next: <a href="Architectures-In-Python.html#Architectures-In-Python" accesskey="n" rel="next">Architectures In Python</a>, Previous: <a href="Finish-Breakpoints-in-Python.html#Finish-Breakpoints-in-Python" accesskey="p" rel="previous">Finish Breakpoints in Python</a>, Up: <a href="Python-API.html#Python-API" accesskey="u" rel="up">Python API</a> [<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>
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