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toolchain-gcc-arm-embedded/share/doc/gcc-arm-none-eabi/html/gdb/gdb_002dadd_002dindex-man.html

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  18. <title>gdb-add-index man (Debugging with GDB)</title>

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  65. <p>

  66. Previous: <a href="gdbinit-man.html#gdbinit-man" accesskey="p" rel="prev">gdbinit man</a>, Up: <a href="Man-Pages.html#Man-Pages" accesskey="u" rel="up">Man Pages</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>

  67. </div>

  68. <hr>

  69. <h4 class="node-heading">gdb-add-index man</h4>

  70. <a name="gdb_002dadd_002dindex-1"></a>

  71. <h3 class="heading">gdb-add-index</h3>

  72. <a name="index-gdb_002dadd_002dindex"></a>

  73. <a name="gdb_002dadd_002dindex"></a>

  74. 

  75. <p>gdb-add-index <var>filename</var>

  76. </p>

  77. <p>When <small>GDB</small> finds a symbol file, it scans the symbols in the

  78. file in order to construct an internal symbol table.  This lets most

  79. <small>GDB</small> operations work quickly&ndash;at the cost of a delay early on.

  80. For large programs, this delay can be quite lengthy, so <small>GDB</small>

  81. provides a way to build an index, which speeds up startup.

  82. </p>

  83. <p>To determine whether a file contains such an index, use the command

  84. <kbd>readelf -S filename</kbd>: the index is stored in a section named

  85. <code>.gdb_index</code>.  The index file can only be produced on systems

  86. which use ELF binaries and DWARF debug information (i.e., sections

  87. named <code>.debug_*</code>).

  88. </p>

  89. <p><code>gdb-add-index</code> uses <small>GDB</small> and <code>objdump</code> found

  90. in the <code>PATH</code> environment variable.  If you want to use different

  91. versions of these programs, you can specify them through the

  92. <code>GDB</code> and <code>OBJDUMP</code> environment variables.

  93. </p>

  94. <p>See more in

  95. <a href="Index-Files.html#Index-Files">Index Files</a>.

  96. </p>

  97. 

  98. 

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