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| <h3 class="heading">gdb-add-index</h3> |
| |
| <p><a name="index-gdb_002dadd_002dindex-3682"></a><a name="gdb_002dadd_002dindex"></a><!-- man title gdb-add-index Add index files to speed up GDB --> |
| |
| <!-- man begin SYNOPSIS gdb-add-index --> |
| <p>gdb-add-index <var>filename</var> |
| <!-- man end --> |
| |
| <!-- man begin DESCRIPTION gdb-add-index --> |
| <p>When <span class="sc">gdb</span> finds a symbol file, it scans the symbols in the |
| file in order to construct an internal symbol table. This lets most |
| <span class="sc">gdb</span> operations work quickly–at the cost of a delay early on. |
| For large programs, this delay can be quite lengthy, so <span class="sc">gdb</span> |
| provides a way to build an index, which speeds up startup. |
| |
| <p>To determine whether a file contains such an index, use the command |
| <kbd>readelf -S filename</kbd>: the index is stored in a section named |
| <code>.gdb_index</code>. The index file can only be produced on systems |
| which use ELF binaries and DWARF debug information (i.e., sections |
| named <code>.debug_*</code>). |
| |
| <p><samp><span class="command">gdb-add-index</span></samp> uses <span class="sc">gdb</span> and <samp><span class="command">objdump</span></samp> found |
| in the <samp><span class="env">PATH</span></samp> environment variable. If you want to use different |
| versions of these programs, you can specify them through the |
| <samp><span class="env">GDB</span></samp> and <samp><span class="env">OBJDUMP</span></samp> environment variables. |
| |
| <p>See more in |
| <a href="Index-Files.html#Index-Files">Index Files</a>. |
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| <!-- man begin SEEALSO gdb-add-index --> |
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