| 1 | <?xml version="1.0" encoding="UTF-8"?>
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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| 4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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| 5 | %general-entities;
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| 6 |
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| 7 | <!ENTITY gdb-download-http "&gnu-http;/gdb/gdb-&gdb-version;.tar.xz">
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| 8 | <!ENTITY gdb-download-ftp " ">
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| 9 | <!ENTITY gdb-md5sum "494e3beaac44e66367c3e443a4414529">
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| 10 | <!ENTITY gdb-size "23 MB">
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| 11 | <!ENTITY gdb-buildsize "806 MB (add 1.0 GB for docs; add 720 MB for tests)">
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| 12 | <!ENTITY gdb-time "0.9 SBU (add 0.4 SBU for docs; see below for tests; all using parallelism=8)">
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| 13 | ]>
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| 14 |
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| 15 | <sect1 id="gdb" xreflabel="GDB-&gdb-version;">
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| 16 | <?dbhtml filename="gdb.html"?>
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| 17 |
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| 18 |
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| 19 | <title>GDB-&gdb-version;</title>
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| 20 |
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| 21 | <indexterm zone="gdb">
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| 22 | <primary sortas="a-GDB">GDB</primary>
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| 23 | </indexterm>
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| 24 |
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| 25 | <sect2 role="package">
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| 26 | <title>Introduction to GDB</title>
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| 27 |
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| 28 | <para>
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| 29 | <application>GDB</application>, the GNU Project debugger, allows you
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| 30 | to see what is going on <quote>inside</quote> another program while it
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| 31 | executes -- or what another program was doing at the moment it crashed.
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| 32 | Note that <application>GDB</application> is most effective when tracing
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| 33 | programs and libraries that were built with debugging symbols and not
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| 34 | stripped.
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| 35 | </para>
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| 36 |
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| 37 | &lfs121_checked;
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| 38 |
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| 39 | <bridgehead renderas="sect3">Package Information</bridgehead>
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| 40 | <itemizedlist spacing="compact">
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| 41 | <listitem>
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| 42 | <para>
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| 43 | Download (HTTP): <ulink url="&gdb-download-http;"/>
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| 44 | </para>
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| 45 | </listitem>
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| 46 | <listitem>
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| 47 | <para>
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| 48 | Download (FTP): <ulink url="&gdb-download-ftp;"/>
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| 49 | </para>
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| 50 | </listitem>
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| 51 | <listitem>
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| 52 | <para>
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| 53 | Download MD5 sum: &gdb-md5sum;
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| 54 | </para>
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| 55 | </listitem>
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| 56 | <listitem>
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| 57 | <para>
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| 58 | Download size: &gdb-size;
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| 59 | </para>
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| 60 | </listitem>
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| 61 | <listitem>
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| 62 | <para>
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| 63 | Estimated disk space required: &gdb-buildsize;
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| 64 | </para>
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| 65 | </listitem>
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| 66 | <listitem>
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| 67 | <para>
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| 68 | Estimated build time: &gdb-time;
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| 69 | </para>
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| 70 | </listitem>
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| 71 | </itemizedlist>
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| 72 | <!--
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| 73 | <bridgehead renderas="sect3">Additional Downloads</bridgehead>
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| 74 | <itemizedlist spacing="compact">
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| 75 | <listitem>
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| 76 | <para>
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| 77 | Required patch:
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| 78 | <ulink url="&patch-root;/gdb-&gdb-version;-upstream_fixes-1.patch"/>
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| 79 | </para>
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| 80 | </listitem>
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| 81 | </itemizedlist>
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| 82 | -->
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| 83 | <bridgehead renderas="sect3">GDB Dependencies</bridgehead>
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| 84 |
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| 85 | <bridgehead renderas="sect4">Recommended Runtime Dependency</bridgehead>
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| 86 | <para role="recommended">
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| 87 | <xref linkend="six"/> (Python 3 module, required at run-time to
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| 88 | use GDB scripts from various LFS/BLFS packages with Python 3
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| 89 | installed in LFS)
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| 90 | </para>
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| 91 |
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| 92 | <bridgehead renderas="sect4">Optional</bridgehead>
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| 93 | <para role="optional">
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| 94 | <xref linkend="doxygen"/>,
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| 95 | <xref linkend="gcc"/> (ada, gfortran, and go are used for tests),
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| 96 | <xref linkend="guile"/>,
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| 97 | <xref linkend="rust"/> (used for some tests),
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| 98 | <xref linkend="valgrind"/>, and
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| 99 | <ulink url="https://sourceware.org/systemtap/">SystemTap</ulink>
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| 100 | (run-time, used for tests)
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| 101 | </para>
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| 102 |
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| 103 | </sect2>
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| 104 |
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| 105 | <sect2 role="installation">
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| 106 | <title>Installation of GDB</title>
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| 107 | <!--
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| 108 | <para>
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| 109 | First, apply a patch that fixes problems when debugging programs compiled
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| 110 | with <xref linkend="rust" role="nodep"/>:
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| 111 | </para>
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| 112 |
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| 113 | <screen><userinput remap="pre">patch -Np1 -i ../gdb-&gdb-version;-upstream_fixes-1.patch</userinput></screen>
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| 114 | -->
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| 115 | <para>
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| 116 | Install <application>GDB</application> by running the following
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| 117 | commands:
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| 118 | </para>
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| 119 |
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| 120 | <screen><userinput>mkdir build &&
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| 121 | cd build &&
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| 122 |
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| 123 | ../configure --prefix=/usr \
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| 124 | --with-system-readline \
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| 125 | --with-python=/usr/bin/python3 &&
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| 126 | make</userinput></screen>
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| 127 |
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| 128 | <para>
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| 129 | Optionally, to build the API documentation using
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| 130 | <xref linkend="doxygen"/>, run:
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| 131 | </para>
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| 132 |
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| 133 | <screen remap="doc"><userinput>make -C gdb/doc doxy</userinput></screen>
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| 134 |
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| 135 | <para>
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| 136 | Running the tests is not recommended. The results vary a lot depending
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| 137 | on the system architecture and what optional dependencies are installed
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| 138 | and what version of gcc is being used. On one system tested, there were
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| 139 | 140 unexpected failures (out of over 108,000 tests) and on another system
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| 140 | there were "only" 32 unexpected failures. The time to run the tests
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| 141 | varies from approximately 6 SBU to over 15 SBU when using -j8. This depends
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| 142 | on number of tests that time out as will as other factors.
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| 143 | </para>
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| 144 |
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| 145 | <tip>
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| 146 | <para>
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| 147 | With a plain <command>make check</command>, there are many warning
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| 148 | messages about a missing global configuration file. These can be
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| 149 | avoided by running <command>touch global.exp</command> and prepending
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| 150 | the <command>make check</command> command with
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| 151 | <command>DEJAGNU=$PWD/global.exp</command>. In addition the tests can
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| 152 | be speeded up considerably by using the <command>make</command> option
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| 153 | "-j<N>" where <N> is the number of cores on your system.
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| 154 | </para>
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| 155 | </tip>
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| 156 |
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| 157 | <para>
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| 158 | To test the results anyway, issue:
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| 159 | </para>
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| 160 |
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| 161 | <screen remap="test"><userinput>pushd gdb/testsuite &&
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| 162 | make site.exp &&
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| 163 | echo "set gdb_test_timeout 30" >> site.exp &&
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| 164 | make check 2>1 | tee gdb-check.log
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| 165 | popd</userinput></screen>
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| 166 |
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| 167 | <para>
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| 168 | See <emphasis>gdb/testsuite/README</emphasis> and <ulink
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| 169 | url="https://sourceware.org/gdb/wiki/TestingGDB">TestingGDB</ulink>.
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| 170 | There are many additional problems with the test suite:
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| 171 | </para>
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| 172 |
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| 173 | <itemizedlist>
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| 174 | <listitem>
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| 175 | <para>
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| 176 | Clean directories are needed if re-running the tests. For that
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| 177 | reason, make a copy of the compiled source code
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| 178 | directory before the tests in case you need to run the tests again.
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| 179 | </para>
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| 180 | </listitem>
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| 181 |
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| 182 | <listitem>
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| 183 | <para>
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| 184 | Results depend on installed compilers.
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| 185 | </para>
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| 186 | </listitem>
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| 187 | <!-- I did not see this
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| 188 | <listitem>
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| 189 | <para>
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| 190 | There are a large number of timeouts (there is a variable
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| 191 | that can be set to increase time for timeout, but
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| 192 | changing it will result in a different number of tests being
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| 193 | run).
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| 194 | </para>
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| 195 | </listitem>
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| 196 | or this
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| 197 | <listitem>
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| 198 | <para>
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| 199 | There are failures associated with system readline 6.x.
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| 200 | </para>
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| 201 | </listitem>
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| 202 | -->
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| 203 | <!--
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| 204 | <listitem>
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| 205 | <para>
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| 206 | A few tests assume that the header file
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| 207 | <filename><sys/sdt.h></filename>, part of <ulink
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| 208 | url="https://sourceware.org/systemtap/">SystemTap</ulink>, is
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| 209 | present.
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| 210 | </para>
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| 211 | </listitem>
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| 212 | -->
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| 213 | <!-- I don't know if this is true or not. I tested on a Haswell.
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| 214 | <listitem>
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| 215 | <para>
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| 216 | If the test suite is run on a Skylake-based Intel CPU or newer,
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| 217 | many tests will fail due to the removal of the deprecated/problematic
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| 218 | libmpx library in GCC.
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| 219 | </para>
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| 220 | </listitem>
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| 221 | -->
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| 222 | <!-- <listitem>
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| 223 | <para>
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| 224 | -->
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| 225 | <!-- for gdb-11.1, gcc-11.2 - pierre
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| 226 | A test run of the test suite had about 1700 unexpected failures
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| 227 | (out of over 80000 tests). Over 1370 of the failures were related
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| 228 | to FORTRAN tests. -->
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| 229 | <!-- for gdb-12.1, gcc-11.3.0 - bdubbs
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| 230 | A test run of the test suite had a little over 200 unexpected failures
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| 231 | out of over 94000 tests.-->
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| 232 | <!-- for gdb-13.0, gcc-12.2.0 - bdubbs
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| 233 | A test run of the test suite had 33 unexpected failures
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| 234 | out of over 106000 tests. -->
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| 235 | <!-- for gdb-13.2, gcc-13.1.0 - pierre
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| 236 | A test run of the test suite had 183 unexpected failures
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| 237 | out of over 105000 tests. -->
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| 238 | <!-- for gdb-14.1, gcc 13.2.0 - rahul -->
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| 239 | <!-- A test run of the test suite had 51 unexpected failures
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| 240 | out of the over 106000 tests.
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| 241 | </para>
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| 242 | </listitem>
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| 243 |
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| 244 | <listitem>
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| 245 | <para>
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| 246 | On some systems, the gdb.tui test suite will fail if running over
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| 247 | SSH.
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| 248 | </para>
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| 249 | </listitem>
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| 250 | -->
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| 251 | <listitem>
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| 252 | <para>
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| 253 | On some AMD-based systems, over 200 additional tests
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| 254 | may fail due to a difference in the threading implementation
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| 255 | on those CPUs.
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| 256 | </para>
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| 257 | </listitem>
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| 258 |
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| 259 | </itemizedlist>
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| 260 |
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| 261 | <para>
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| 262 | Now, as the <systemitem class="username">root</systemitem> user:
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| 263 | </para>
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| 264 |
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| 265 | <screen role="root"><userinput>make -C gdb install &&
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| 266 | make -C gdbserver install</userinput></screen>
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| 267 |
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| 268 | <para>
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| 269 | If you have built the API documentation, it is now in gdb/doc/doxy.
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| 270 | You can install it (as the <systemitem class="username">root</systemitem>
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| 271 | user):
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| 272 | </para>
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| 273 |
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| 274 | <screen role="root"
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| 275 | remap="doc"><userinput>install -d /usr/share/doc/gdb-&gdb-version; &&
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| 276 | rm -rf gdb/doc/doxy/xml &&
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| 277 | cp -Rv gdb/doc/doxy /usr/share/doc/gdb-&gdb-version;</userinput></screen>
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| 278 |
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| 279 | </sect2>
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| 280 |
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| 281 | <sect2 role="commands">
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| 282 | <title>Command Explanations</title>
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| 283 |
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| 284 | <para>
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| 285 | <parameter>--with-system-readline</parameter>: This switch forces
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| 286 | <application>GDB</application> to use the copy of
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| 287 | <application>Readline</application> installed in LFS.
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| 288 | </para>
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| 289 |
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| 290 | <para>
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| 291 | <parameter>--with-python=/usr/bin/python3</parameter>: This switch
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| 292 | forces <application>GDB</application> to use Python 3.
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| 293 | </para>
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| 294 |
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| 295 | </sect2>
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| 296 |
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| 297 | <sect2 role="content">
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| 298 | <title>Contents</title>
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| 299 |
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| 300 | <segmentedlist>
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| 301 | <segtitle>Installed Programs</segtitle>
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| 302 | <segtitle>Installed Library</segtitle>
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| 303 | <segtitle>Installed Directories</segtitle>
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| 304 |
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| 305 | <seglistitem>
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| 306 | <seg>
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| 307 | gcore, gdb, gdbserver, and gdb-add-index
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| 308 | </seg>
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| 309 | <seg>
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| 310 | libinproctrace.so
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| 311 | </seg>
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| 312 | <seg>
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| 313 | /usr/{include,share}/gdb and /usr/share/doc/gdb-&gdb-version;
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| 314 | </seg>
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| 315 | </seglistitem>
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| 316 | </segmentedlist>
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| 317 |
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| 318 | <variablelist>
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| 319 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 320 | <?dbfo list-presentation="list"?>
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| 321 | <?dbhtml list-presentation="table"?>
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| 322 |
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| 323 | <varlistentry id="gcore">
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| 324 | <term><command>gcore</command></term>
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| 325 | <listitem>
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| 326 | <para>
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| 327 | generates a core dump of a running program
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| 328 | </para>
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| 329 | <indexterm zone="gdb gcore">
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| 330 | <primary sortas="b-gcore">gcore</primary>
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| 331 | </indexterm>
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| 332 | </listitem>
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| 333 | </varlistentry>
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| 334 |
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| 335 | <varlistentry id="gdb-prog">
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| 336 | <term><command>gdb</command></term>
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| 337 | <listitem>
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| 338 | <para>
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| 339 | is the GNU Debugger
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| 340 | </para>
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| 341 | <indexterm zone="gdb gdb-prog">
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| 342 | <primary sortas="b-gdb-prog">gdb-prog</primary>
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| 343 | </indexterm>
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| 344 | </listitem>
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| 345 | </varlistentry>
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| 346 |
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| 347 | <varlistentry id="gdbserver">
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| 348 | <term><command>gdbserver</command></term>
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| 349 | <listitem>
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| 350 | <para>
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| 351 | is a remote server for the GNU debugger (it allows programs
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| 352 | to be debugged from a different machine)
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| 353 | </para>
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| 354 | <indexterm zone="gdb gdbserver">
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| 355 | <primary sortas="b-gdbserver">gdbserver</primary>
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| 356 | </indexterm>
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| 357 | </listitem>
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| 358 | </varlistentry>
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| 359 |
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| 360 | <varlistentry id="gdb-add-index">
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| 361 | <term><command>gdb-add-index</command></term>
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| 362 | <listitem>
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| 363 | <para>
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| 364 | Allows adding index files to ELF binaries. This speeds up
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| 365 | <command>gdb</command> start on large programs.
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| 366 | </para>
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| 367 | <indexterm zone="gdb gdb-add-index">
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| 368 | <primary sortas="b-gdb-add-index">gdb-add-index</primary>
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| 369 | </indexterm>
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| 370 | </listitem>
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| 371 | </varlistentry>
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| 372 |
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| 373 | <varlistentry id="libinproctrace">
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| 374 | <term><filename class="libraryfile">libinproctrace.so</filename></term>
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| 375 | <listitem>
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| 376 | <para>
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| 377 | contains functions for the in-process tracing agent. The agent
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| 378 | allows for installing fast tracepoints, listing static tracepoint
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| 379 | markers, probing static tracepoints markers, and starting trace
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| 380 | monitoring.
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| 381 | </para>
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| 382 | <indexterm zone="gdb libinproctrace">
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| 383 | <primary sortas="c-libinproctrace">libinproctrace.so</primary>
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| 384 | </indexterm>
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| 385 | </listitem>
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| 386 | </varlistentry>
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| 387 |
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| 388 | </variablelist>
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| 389 |
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| 390 | </sect2>
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| 391 |
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| 392 | </sect1>
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