Expand libstdc++ docs on testing
* doc/xml/manual/test.xml (test.run.permutations): Expand section. (test.new_tests): Rewrite section. (tests.dg.directives): New section. * doc/html/*: Regenerate. From-SVN: r239574
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2016-08-18 Jonathan Wakely <jwakely@redhat.com>
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* doc/xml/manual/test.xml (test.run.permutations): Expand section.
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(test.new_tests): Rewrite section.
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(tests.dg.directives): New section.
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* doc/html/*: Regenerate.
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* doc/xml/manual/test.xml: Improve documentation of test targets.
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Document new-abi-baseline, check-debug, and check-parallel targets.
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@ -281,7 +281,7 @@
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performance testing. Please consult the
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<a class="link" href="http://gcc.gnu.org/install/test.html" target="_top">testing
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documentation</a> for GCC and
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<a class="link" href="manual/test.html" title="Test">Test</a> in the libstdc++
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<a class="link" href="manual/test.html" title="Testing">Testing</a> in the libstdc++
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manual for more details.
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</p><p>
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If you find bugs in the testsuite programs themselves, or if you
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>ABI Policy and Guidelines</title><meta name="generator" content="DocBook XSL-NS Stylesheets V1.78.1" /><meta name="keywords" content="C++, ABI, version, dynamic, shared, compatibility" /><meta name="keywords" content="ISO C++, library" /><meta name="keywords" content="ISO C++, runtime, library" /><link rel="home" href="../index.html" title="The GNU C++ Library" /><link rel="up" href="appendix_porting.html" title="Appendix B. Porting and Maintenance" /><link rel="prev" href="test.html" title="Test" /><link rel="next" href="api.html" title="API Evolution and Deprecation History" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">ABI Policy and Guidelines</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="test.html">Prev</a> </td><th width="60%" align="center">Appendix B.
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>ABI Policy and Guidelines</title><meta name="generator" content="DocBook XSL-NS Stylesheets V1.78.1" /><meta name="keywords" content="C++, ABI, version, dynamic, shared, compatibility" /><meta name="keywords" content="ISO C++, library" /><meta name="keywords" content="ISO C++, runtime, library" /><link rel="home" href="../index.html" title="The GNU C++ Library" /><link rel="up" href="appendix_porting.html" title="Appendix B. Porting and Maintenance" /><link rel="prev" href="test.html" title="Testing" /><link rel="next" href="api.html" title="API Evolution and Deprecation History" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">ABI Policy and Guidelines</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="test.html">Prev</a> </td><th width="60%" align="center">Appendix B.
|
||||
Porting and Maintenance
|
||||
|
||||
</th><td width="20%" align="right"> <a accesskey="n" href="api.html">Next</a></td></tr></table><hr /></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="appendix.porting.abi"></a>ABI Policy and Guidelines</h2></div></div></div><p>
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@ -532,4 +532,4 @@ gcc test.c -g -O2 -L. -lone -ltwo /usr/lib/libstdc++.so.5 /usr/lib/libstdc++.so.
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</a>
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</em>. </span><span class="subtitle">
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SYRCoSE 2009
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. </span><span class="author"><span class="firstname">Pavel</span> <span class="surname">Shved</span>. </span><span class="author"><span class="firstname">Denis</span> <span class="surname">Silakov</span>. </span></p></div></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="test.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="appendix_porting.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="api.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Test </td><td width="20%" align="center"><a accesskey="h" href="../index.html">Home</a></td><td width="40%" align="right" valign="top"> API Evolution and Deprecation History</td></tr></table></div></body></html>
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. </span><span class="author"><span class="firstname">Pavel</span> <span class="surname">Shved</span>. </span><span class="author"><span class="firstname">Denis</span> <span class="surname">Silakov</span>. </span></p></div></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="test.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="appendix_porting.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="api.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Testing </td><td width="20%" align="center"><a accesskey="h" href="../index.html">Home</a></td><td width="40%" align="right" valign="top"> API Evolution and Deprecation History</td></tr></table></div></body></html>
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>Porting to New Hardware or Operating Systems</title><meta name="generator" content="DocBook XSL-NS Stylesheets V1.78.1" /><meta name="keywords" content="ISO C++, internals" /><meta name="keywords" content="ISO C++, library" /><meta name="keywords" content="ISO C++, runtime, library" /><link rel="home" href="../index.html" title="The GNU C++ Library" /><link rel="up" href="appendix_porting.html" title="Appendix B. Porting and Maintenance" /><link rel="prev" href="documentation_hacking.html" title="Writing and Generating Documentation" /><link rel="next" href="test.html" title="Test" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Porting to New Hardware or Operating Systems</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="documentation_hacking.html">Prev</a> </td><th width="60%" align="center">Appendix B.
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>Porting to New Hardware or Operating Systems</title><meta name="generator" content="DocBook XSL-NS Stylesheets V1.78.1" /><meta name="keywords" content="ISO C++, internals" /><meta name="keywords" content="ISO C++, library" /><meta name="keywords" content="ISO C++, runtime, library" /><link rel="home" href="../index.html" title="The GNU C++ Library" /><link rel="up" href="appendix_porting.html" title="Appendix B. Porting and Maintenance" /><link rel="prev" href="documentation_hacking.html" title="Writing and Generating Documentation" /><link rel="next" href="test.html" title="Testing" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Porting to New Hardware or Operating Systems</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="documentation_hacking.html">Prev</a> </td><th width="60%" align="center">Appendix B.
|
||||
Porting and Maintenance
|
||||
|
||||
</th><td width="20%" align="right"> <a accesskey="n" href="test.html">Next</a></td></tr></table><hr /></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="appendix.porting.internals"></a>Porting to New Hardware or Operating Systems</h2></div></div></div><p>
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|
@ -371,4 +371,4 @@ do this is to build the library using <code class="code">gcc -shared</code>.
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<code class="code">ltcf-c.sh</code> in the top-level directory. Find the switch statement
|
||||
that sets <code class="code">archive_cmds</code>. Here, adjust the setting for your
|
||||
operating system.
|
||||
</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="documentation_hacking.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="appendix_porting.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="test.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Writing and Generating Documentation </td><td width="20%" align="center"><a accesskey="h" href="../index.html">Home</a></td><td width="40%" align="right" valign="top"> Test</td></tr></table></div></body></html>
|
||||
</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="documentation_hacking.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="appendix_porting.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="test.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Writing and Generating Documentation </td><td width="20%" align="center"><a accesskey="h" href="../index.html">Home</a></td><td width="40%" align="right" valign="top"> Testing</td></tr></table></div></body></html>
|
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@ -1,62 +1,62 @@
|
|||
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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||||
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>Test</title><meta name="generator" content="DocBook XSL-NS Stylesheets V1.78.1" /><meta name="keywords" content="ISO C++, test, testsuite, performance, conformance, ABI, exception safety" /><meta name="keywords" content="ISO C++, library" /><meta name="keywords" content="ISO C++, runtime, library" /><link rel="home" href="../index.html" title="The GNU C++ Library" /><link rel="up" href="appendix_porting.html" title="Appendix B. Porting and Maintenance" /><link rel="prev" href="internals.html" title="Porting to New Hardware or Operating Systems" /><link rel="next" href="abi.html" title="ABI Policy and Guidelines" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Test</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="internals.html">Prev</a> </td><th width="60%" align="center">Appendix B.
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>Testing</title><meta name="generator" content="DocBook XSL-NS Stylesheets V1.78.1" /><meta name="keywords" content="ISO C++, test, testsuite, performance, conformance, ABI, exception safety" /><meta name="keywords" content="ISO C++, library" /><meta name="keywords" content="ISO C++, runtime, library" /><link rel="home" href="../index.html" title="The GNU C++ Library" /><link rel="up" href="appendix_porting.html" title="Appendix B. Porting and Maintenance" /><link rel="prev" href="internals.html" title="Porting to New Hardware or Operating Systems" /><link rel="next" href="abi.html" title="ABI Policy and Guidelines" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Testing</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="internals.html">Prev</a> </td><th width="60%" align="center">Appendix B.
|
||||
Porting and Maintenance
|
||||
|
||||
</th><td width="20%" align="right"> <a accesskey="n" href="abi.html">Next</a></td></tr></table><hr /></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="manual.intro.setup.test"></a>Test</h2></div></div></div><p>
|
||||
</th><td width="20%" align="right"> <a accesskey="n" href="abi.html">Next</a></td></tr></table><hr /></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="manual.intro.setup.test"></a>Testing</h2></div></div></div><p>
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The libstdc++ testsuite includes testing for standard conformance,
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regressions, ABI, and performance.
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</p><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="test.organization"></a>Organization</h3></div></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="test.organization.layout"></a>Directory Layout</h4></div></div></div><p>
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The directory <span class="emphasis"><em>libsrcdir/testsuite</em></span> contains the
|
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individual test cases organized in sub-directories corresponding to
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clauses of the C++ standard (detailed below), the dejagnu test
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harness support files, and sources to various testsuite utilities
|
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that are packaged in a separate testing library.
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</p><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="test.organization"></a>Test Organization</h3></div></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="test.organization.layout"></a>Directory Layout</h4></div></div></div><p>
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The directory
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<code class="filename"><em class="replaceable"><code>gccsrcdir</code></em>/libstdc++-v3/testsuite</code>
|
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contains the individual test cases organized in sub-directories
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corresponding to clauses of the C++ standard (detailed below),
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the DejaGnu test harness support files, and sources to various
|
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testsuite utilities that are packaged in a separate testing library.
|
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</p><p>
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All test cases for functionality required by the runtime components
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of the C++ standard (ISO 14882) are files within the following
|
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directories.
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</p><pre class="programlisting">
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17_intro
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18_support
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19_diagnostics
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20_util
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21_strings
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22_locale
|
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23_containers
|
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25_algorithms
|
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26_numerics
|
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27_io
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28_regex
|
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29_atomics
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30_threads
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</pre><p>
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In addition, the following directories include test files:
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directories:
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</p><pre class="programlisting">
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tr1 Tests for components as described by the Technical Report on Standard Library Extensions (TR1).
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backward Tests for backwards compatibility and deprecated features.
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demangle Tests for __cxa_demangle, the IA 64 C++ ABI demangler
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ext Tests for extensions.
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performance Tests for performance analysis, and performance regressions.
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17_intro
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18_support
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19_diagnostics
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20_util
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21_strings
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22_locale
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23_containers
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24_iterators
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25_algorithms
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26_numerics
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27_io
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28_regex
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29_atomics
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30_threads
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</pre><p>
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</p><p>
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In addition, the following directories include test files:
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</p><div class="variablelist"><dl class="variablelist compact"><dt><span class="term"><code class="filename">tr1</code></span></dt><dd>Tests for components as described by the Technical Report
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on Standard Library Extensions (TR1).
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</dd><dt><span class="term"><code class="filename">backward</code></span></dt><dd>Tests for backwards compatibility and deprecated features.
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</dd><dt><span class="term"><code class="filename">demangle</code></span></dt><dd>Tests for <code class="function">__cxa_demangle</code>, the IA-64 C++ ABI
|
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demangler.
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</dd><dt><span class="term"><code class="filename">ext</code></span></dt><dd>Tests for extensions.</dd><dt><span class="term"><code class="filename">performance</code></span></dt><dd>Tests for performance analysis, and performance regressions.
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</dd></dl></div><p>
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</p><p>
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Some directories don't have test files, but instead contain
|
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auxiliary information:
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</p><pre class="programlisting">
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config Files for the dejagnu test harness.
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lib Files for the dejagnu test harness.
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libstdc++* Files for the dejagnu test harness.
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data Sample text files for testing input and output.
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util Files for libtestc++, utilities and testing routines.
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</pre><p>
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</p><div class="variablelist"><dl class="variablelist compact"><dt><span class="term"><code class="filename">config</code></span></dt><dd>Files for the DejaGnu test harness.</dd><dt><span class="term"><code class="filename">lib</code></span></dt><dd>Files for the DejaGnu test harness.</dd><dt><span class="term"><code class="filename">libstdc++*</code></span></dt><dd>Files for the DejaGnu test harness.</dd><dt><span class="term"><code class="filename">data</code></span></dt><dd>Sample text files for testing input and output.</dd><dt><span class="term"><code class="filename">util</code></span></dt><dd>Files for libtestc++, utilities and testing routines.</dd></dl></div><p>
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</p><p>
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Within a directory that includes test files, there may be
|
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additional subdirectories, or files. Originally, test cases
|
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were appended to one file that represented a particular section
|
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of the chapter under test, and was named accordingly. For
|
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instance, to test items related to <code class="code"> 21.3.6.1 -
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basic_string::find [lib.string::find]</code> in the standard,
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the following was used:
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</p><pre class="programlisting">
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21_strings/find.cc
|
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</pre><p>
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<code class="function">basic_string::find</code> [lib.string::find]</code>
|
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in the standard, the following was used:
|
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</p><pre class="programlisting"> 21_strings/find.cc </pre><p>
|
||||
However, that practice soon became a liability as the test cases
|
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became huge and unwieldy, and testing new or extended
|
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functionality (like wide characters or named locales) became
|
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|
@ -66,83 +66,77 @@ util Files for libtestc++, utilities and testing routines.
|
|||
above issues and gives finer grained results and more manageable
|
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error debugging. As an example, the test case quoted above
|
||||
becomes:
|
||||
</p><pre class="programlisting">
|
||||
21_strings/basic_string/find/char/1.cc
|
||||
21_strings/basic_string/find/char/2.cc
|
||||
21_strings/basic_string/find/char/3.cc
|
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21_strings/basic_string/find/wchar_t/1.cc
|
||||
21_strings/basic_string/find/wchar_t/2.cc
|
||||
21_strings/basic_string/find/wchar_t/3.cc
|
||||
</pre><p>
|
||||
All new tests should be written with the policy of one test
|
||||
case, one file in mind.
|
||||
</p><pre class="programlisting"> 21_strings/basic_string/find/char/1.cc
|
||||
21_strings/basic_string/find/char/2.cc
|
||||
21_strings/basic_string/find/char/3.cc
|
||||
21_strings/basic_string/find/wchar_t/1.cc
|
||||
21_strings/basic_string/find/wchar_t/2.cc
|
||||
21_strings/basic_string/find/wchar_t/3.cc</pre><p>
|
||||
</p><p>
|
||||
All new tests should be written with the policy of "one test
|
||||
case, one file" in mind.
|
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</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="test.organization.naming"></a>Naming Conventions</h4></div></div></div><p>
|
||||
In addition, there are some special names and suffixes that are
|
||||
used within the testsuite to designate particular kinds of
|
||||
tests.
|
||||
</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>
|
||||
<span class="emphasis"><em>_xin.cc</em></span>
|
||||
</p><p>
|
||||
</p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="filename">_xin.cc</code></span></dt><dd>
|
||||
This test case expects some kind of interactive input in order
|
||||
to finish or pass. At the moment, the interactive tests are not
|
||||
run by default. Instead, they are run by hand, like:
|
||||
</p><pre class="programlisting">
|
||||
<pre class="programlisting">
|
||||
g++ 27_io/objects/char/3_xin.cc
|
||||
cat 27_io/objects/char/3_xin.in | a.out
|
||||
</pre></li><li class="listitem"><p>
|
||||
<span class="emphasis"><em>.in</em></span>
|
||||
</p><p>
|
||||
cat 27_io/objects/char/3_xin.in | a.out</pre></dd><dt><span class="term"><code class="filename">.in</code></span></dt><dd>
|
||||
This file contains the expected input for the corresponding <span class="emphasis"><em>
|
||||
_xin.cc</em></span> test case.
|
||||
</p></li><li class="listitem"><p>
|
||||
<span class="emphasis"><em>_neg.cc</em></span>
|
||||
</p><p>
|
||||
</dd><dt><span class="term"><code class="filename">_neg.cc</code></span></dt><dd>
|
||||
This test case is expected to fail: it's a negative test. At the
|
||||
moment, these are almost always compile time errors.
|
||||
</p></li><li class="listitem"><p>
|
||||
<span class="emphasis"><em>char</em></span>
|
||||
</p><p>
|
||||
</dd><dt><span class="term"><code class="filename">char</code></span></dt><dd>
|
||||
This can either be a directory name or part of a longer file
|
||||
name, and indicates that this file, or the files within this
|
||||
directory are testing the <code class="code">char</code> instantiation of a
|
||||
template.
|
||||
</p></li><li class="listitem"><p>
|
||||
<span class="emphasis"><em>wchar_t</em></span>
|
||||
</p><p>
|
||||
</dd><dt><span class="term"><code class="filename">wchar_t</code></span></dt><dd>
|
||||
This can either be a directory name or part of a longer file
|
||||
name, and indicates that this file, or the files within this
|
||||
directory are testing the <code class="code">wchar_t</code> instantiation of
|
||||
a template. Some hosts do not support <code class="code">wchar_t</code>
|
||||
functionality, so for these targets, all of these tests will not
|
||||
be run.
|
||||
</p></li><li class="listitem"><p>
|
||||
<span class="emphasis"><em>thread</em></span>
|
||||
</p><p>
|
||||
</dd><dt><span class="term"><code class="filename">thread</code></span></dt><dd>
|
||||
This can either be a directory name or part of a longer file
|
||||
name, and indicates that this file, or the files within this
|
||||
directory are testing situations where multiple threads are
|
||||
being used.
|
||||
</p></li><li class="listitem"><p>
|
||||
<span class="emphasis"><em>performance</em></span>
|
||||
</p><p>
|
||||
</dd><dt><span class="term"><code class="filename">performance</code></span></dt><dd>
|
||||
This can either be an enclosing directory name or part of a
|
||||
specific file name. This indicates a test that is used to
|
||||
analyze runtime performance, for performance regression testing,
|
||||
or for other optimization related analysis. At the moment, these
|
||||
test cases are not run by default.
|
||||
</p></li></ul></div></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="test.run"></a>Running the Testsuite</h3></div></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="test.run.basic"></a>Basic</h4></div></div></div><p>
|
||||
</dd></dl></div></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="test.run"></a>Running the Testsuite</h3></div></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="test.run.basic"></a>Basic</h4></div></div></div><p>
|
||||
You can check the status of the build without installing it
|
||||
using the dejagnu harness, much like the rest of the gcc
|
||||
tools.</p><pre class="programlisting"> make check</pre><p>in the <span class="emphasis"><em>libbuilddir</em></span> directory.</p><p>or</p><pre class="programlisting"> make check-target-libstdc++-v3</pre><p>in the <span class="emphasis"><em>gccbuilddir</em></span> directory.
|
||||
</p><p>
|
||||
using the DejaGnu harness, much like the rest of the gcc
|
||||
tools, i.e.
|
||||
<strong class="userinput"><code>make check</code></strong>
|
||||
in the
|
||||
<code class="filename"><em class="replaceable"><code>libbuilddir</code></em></code>
|
||||
directory, or
|
||||
<strong class="userinput"><code>make check-target-libstdc++-v3</code></strong>
|
||||
in the
|
||||
<code class="filename"><em class="replaceable"><code>gccbuilddir</code></em></code>
|
||||
directory.
|
||||
</p><p>
|
||||
These commands are functionally equivalent and will create a
|
||||
'testsuite' directory underneath
|
||||
<span class="emphasis"><em>libbuilddir</em></span> containing the results of the
|
||||
tests. Two results files will be generated: <span class="emphasis"><em>
|
||||
libstdc++.sum</em></span>, which is a PASS/FAIL summary for each
|
||||
test, and <span class="emphasis"><em>libstdc++.log</em></span> which is a log of
|
||||
the exact command line passed to the compiler, the compiler
|
||||
output, and the executable output (if any).
|
||||
'<code class="filename">testsuite</code>' directory underneath
|
||||
<code class="filename"><em class="replaceable"><code>libbuilddir</code></em></code>
|
||||
containing the results of the
|
||||
tests. Two results files will be generated:
|
||||
<code class="filename">libstdc++.sum</code>, which is a PASS/FAIL summary
|
||||
for each test, and
|
||||
<code class="filename">libstdc++.log</code> which is a log of
|
||||
the exact command-line passed to the compiler, the compiler
|
||||
output, and the executable output (if any) for each test.
|
||||
</p><p>
|
||||
Archives of test results for various versions and platforms are
|
||||
available on the GCC website in the <a class="link" href="http://gcc.gnu.org/gcc-4.3/buildstat.html" target="_top">build
|
||||
|
@ -157,60 +151,74 @@ cat 27_io/objects/char/3_xin.in | a.out
|
|||
installed tools, etc. In addition, there is a special rule for
|
||||
checking the exported symbols of the shared library.
|
||||
</p><p>
|
||||
To debug the dejagnu test harness during runs, try invoking with a
|
||||
specific argument to the variable RUNTESTFLAGS, as below.
|
||||
</p><pre class="programlisting">
|
||||
make check-target-libstdc++-v3 RUNTESTFLAGS="-v"
|
||||
To debug the DejaGnu test harness during runs, try invoking with a
|
||||
specific argument to the variable <code class="varname">RUNTESTFLAGS</code>,
|
||||
like so:
|
||||
</p><pre class="programlisting">
|
||||
make check-target-libstdc++-v3 RUNTESTFLAGS="-v"
|
||||
</pre><p>
|
||||
or
|
||||
</p><pre class="programlisting">
|
||||
make check-target-libstdc++-v3 RUNTESTFLAGS="-v -v"
|
||||
</p><pre class="programlisting">
|
||||
make check-target-libstdc++-v3 RUNTESTFLAGS="-v -v"
|
||||
</pre><p>
|
||||
</p><p>
|
||||
To run a subset of the library tests, you can either generate the
|
||||
<span class="emphasis"><em>testsuite_files</em></span> file (described below) by running
|
||||
<span class="command"><strong>make testsuite_files</strong></span> in the
|
||||
<span class="emphasis"><em>libbuilddir/testsuite</em></span> directory, then edit the
|
||||
<code class="filename">testsuite_files</code> file (described below) by running
|
||||
<strong class="userinput"><code>make testsuite_files</code></strong> in the
|
||||
<code class="filename"><em class="replaceable"><code>libbuilddir</code></em>/testsuite</code>
|
||||
directory, then edit the
|
||||
file to remove the tests you don't want and then run the testsuite as
|
||||
normal, or you can specify a testsuite and a subset of tests in the
|
||||
RUNTESTFLAGS variable.
|
||||
<code class="varname">RUNTESTFLAGS</code> variable.
|
||||
</p><p>
|
||||
For example, to run only the tests for containers you could use:
|
||||
</p><pre class="programlisting">
|
||||
make check-target-libstdc++-v3 RUNTESTFLAGS="conformance.exp=23_containers/*"
|
||||
|
||||
</p><pre class="programlisting">
|
||||
make check-target-libstdc++-v3 RUNTESTFLAGS="conformance.exp=23_containers/*"
|
||||
</pre><p>
|
||||
When combining this with other options in RUNTESTFLAGS the
|
||||
<span class="emphasis"><em>testsuite.exp=testfiles</em></span> options must come first.
|
||||
</p><p>
|
||||
There are two ways to run on a simulator: set up DEJAGNU to point to a
|
||||
specially crafted site.exp, or pass down --target_board flags.
|
||||
When combining this with other options in <code class="varname">RUNTESTFLAGS</code>
|
||||
the <code class="option">testsuite.exp=testfiles</code> options must come first.
|
||||
</p><p>
|
||||
There are two ways to run on a simulator: set up <code class="envar">DEJAGNU</code>
|
||||
to point to a specially crafted <code class="filename">site.exp</code>,
|
||||
or pass down <code class="option">--target_board</code> flags.
|
||||
</p><p>
|
||||
Example flags to pass down for various embedded builds are as follows:
|
||||
</p><pre class="programlisting">
|
||||
--target=powerpc-eabism (libgloss/sim)
|
||||
make check-target-libstdc++-v3 RUNTESTFLAGS="--target_board=powerpc-sim"
|
||||
|
||||
--target=calmrisc32 (libgloss/sid)
|
||||
make check-target-libstdc++-v3 RUNTESTFLAGS="--target_board=calmrisc32-sid"
|
||||
</p><pre class="programlisting">
|
||||
--target=powerpc-eabisim <span class="emphasis"><em>(libgloss/sim)</em></span>
|
||||
make check-target-libstdc++-v3 RUNTESTFLAGS="--target_board=powerpc-sim"
|
||||
|
||||
--target=xscale-elf (newlib/sim)
|
||||
make check-target-libstdc++-v3 RUNTESTFLAGS="--target_board=arm-sim"
|
||||
--target=calmrisc32 <span class="emphasis"><em>(libgloss/sid)</em></span>
|
||||
make check-target-libstdc++-v3 RUNTESTFLAGS="--target_board=calmrisc32-sid"
|
||||
|
||||
--target=xscale-elf <span class="emphasis"><em>(newlib/sim)</em></span>
|
||||
make check-target-libstdc++-v3 RUNTESTFLAGS="--target_board=arm-sim"
|
||||
</pre><p>
|
||||
</p><p>
|
||||
Also, here is an example of how to run the libstdc++ testsuite
|
||||
for a multilibed build directory with different ABI settings:
|
||||
</p><pre class="programlisting">
|
||||
make check-target-libstdc++-v3 RUNTESTFLAGS='--target_board \"unix{-mabi=32,,-mabi=64}\"'
|
||||
|
||||
</p><pre class="programlisting">
|
||||
make check-target-libstdc++-v3 RUNTESTFLAGS='--target_board \"unix{-mabi=32,,-mabi=64}\"'
|
||||
</pre><p>
|
||||
</p><p>
|
||||
You can run the tests with a compiler and library that have
|
||||
already been installed. Make sure that the compiler (e.g.,
|
||||
<code class="code">g++</code>) is in your <code class="code">PATH</code>. If you are
|
||||
<span class="command"><strong>g++</strong></span>) is in your <code class="envar">PATH</code>. If you are
|
||||
using shared libraries, then you must also ensure that the
|
||||
directory containing the shared version of libstdc++ is in your
|
||||
<code class="code">LD_LIBRARY_PATH</code>, or equivalent. If your GCC source
|
||||
tree is at <code class="code">/path/to/gcc</code>, then you can run the tests
|
||||
as follows:
|
||||
</p><pre class="programlisting">
|
||||
runtest --tool libstdc++ --srcdir=/path/to/gcc/libstdc++-v3/testsuite
|
||||
<code class="envar">LD_LIBRARY_PATH</code>, or
|
||||
<a class="link" href="using_dynamic_or_shared.html#manual.intro.using.linkage.dynamic" title="Finding Dynamic or Shared Libraries">equivalent</a>.
|
||||
If your GCC source tree is at
|
||||
<code class="filename">/path/to/gcc</code>,
|
||||
then you can run the tests as follows:
|
||||
|
||||
</p><pre class="programlisting">
|
||||
runtest --tool libstdc++ --srcdir=/path/to/gcc/libstdc++-v3/testsuite
|
||||
</pre><p>
|
||||
</p><p>
|
||||
The testsuite will create a number of files in the directory in
|
||||
which you run this command,. Some of those files might use the
|
||||
same name as files created by other testsuites (like the ones
|
||||
|
@ -219,91 +227,142 @@ runtest --tool libstdc++ --srcdir=/path/to/gcc/libstdc++-v3/testsuite
|
|||
</p><p>
|
||||
In addition, there are some testing options that are mostly of
|
||||
interest to library maintainers and system integrators. As such,
|
||||
these tests may not work on all cpu and host combinations, and
|
||||
these tests may not work on all CPU and host combinations, and
|
||||
may need to be executed in the
|
||||
<span class="emphasis"><em>libbuilddir/testsuite</em></span> directory. These
|
||||
<code class="filename"><em class="replaceable"><code>libbuilddir</code></em>/testsuite</code>
|
||||
directory. These
|
||||
options include, but are not necessarily limited to, the
|
||||
following:
|
||||
</p><pre class="programlisting">
|
||||
</p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><strong class="userinput"><code>
|
||||
make testsuite_files
|
||||
</pre><p>
|
||||
</code></strong></span></dt><dd><p>
|
||||
Five files are generated that determine what test files
|
||||
are run. These files are:
|
||||
</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>
|
||||
<span class="emphasis"><em>testsuite_files</em></span>
|
||||
</p><p>
|
||||
|
||||
</p><div class="variablelist"><dl class="variablelist"><dt><span class="term"> <code class="filename">testsuite_files</code> </span></dt><dd>
|
||||
This is a list of all the test cases that will be run. Each
|
||||
test case is on a separate line, given with an absolute path
|
||||
from the <span class="emphasis"><em>libsrcdir/testsuite</em></span> directory.
|
||||
</p></li><li class="listitem"><p>
|
||||
<span class="emphasis"><em>testsuite_files_interactive</em></span>
|
||||
</p><p>
|
||||
from the
|
||||
<code class="filename"><em class="replaceable"><code>libsrcdir</code></em>/testsuite</code>
|
||||
directory.
|
||||
</dd><dt><span class="term"> <code class="filename">testsuite_files_interactive</code> </span></dt><dd>
|
||||
This is a list of all the interactive test cases, using the
|
||||
same format as the file list above. These tests are not run
|
||||
by default.
|
||||
</p></li><li class="listitem"><p>
|
||||
<span class="emphasis"><em>testsuite_files_performance</em></span>
|
||||
</p><p>
|
||||
</dd><dt><span class="term"> <code class="filename">testsuite_files_performance</code> </span></dt><dd>
|
||||
This is a list of all the performance test cases, using the
|
||||
same format as the file list above. These tests are not run
|
||||
by default.
|
||||
</p></li><li class="listitem"><p>
|
||||
<span class="emphasis"><em>testsuite_thread</em></span>
|
||||
</p><p>
|
||||
</dd><dt><span class="term"> <code class="filename">testsuite_thread</code> </span></dt><dd>
|
||||
This file indicates that the host system can run tests which
|
||||
involved multiple threads.
|
||||
</p></li><li class="listitem"><p>
|
||||
<span class="emphasis"><em>testsuite_wchar_t</em></span>
|
||||
</p><p>
|
||||
This file indicates that the host system can run the wchar_t
|
||||
tests, and corresponds to the macro definition <code class="code">
|
||||
_GLIBCXX_USE_WCHAR_T</code> in the file c++config.h.
|
||||
</p></li></ul></div><pre class="programlisting">
|
||||
</dd><dt><span class="term"> <code class="filename">testsuite_wchar_t</code> </span></dt><dd>
|
||||
This file indicates that the host system can run the
|
||||
<code class="code">wchar_t</code> tests, and corresponds to the macro
|
||||
definition <code class="literal">_GLIBCXX_USE_WCHAR_T</code> in the
|
||||
file <code class="filename">c++config.h</code>.
|
||||
</dd></dl></div><p>
|
||||
</p></dd><dt><span class="term"><strong class="userinput"><code>
|
||||
make check-abi
|
||||
</pre><p>
|
||||
</code></strong></span></dt><dd><p>
|
||||
The library ABI can be tested. This involves testing the shared
|
||||
library against an ABI-defining previous version of symbol
|
||||
exports.
|
||||
</p><pre class="programlisting">
|
||||
library against a baseline list of symbol exports that defines the
|
||||
previous version of the ABI. The tests require that no exported
|
||||
symbols are removed, no new symbols are added to the old symbol
|
||||
versions, and any new symbols have the latest symbol version.
|
||||
See <a class="link" href="abi.html#abi.versioning" title="Versioning">Versioning</a> for more details
|
||||
of the ABI version history.
|
||||
</p></dd><dt><span class="term"><strong class="userinput"><code>
|
||||
make new-abi-baseline
|
||||
</code></strong></span></dt><dd><p>
|
||||
Generate a new baseline set of symbols exported from the library
|
||||
(written to a file under
|
||||
<code class="filename"><em class="replaceable"><code>libsrcdir</code></em>/config/abi/post/<em class="replaceable"><code>target</code></em>/</code>).
|
||||
A different baseline symbols file is needed for each architecture and
|
||||
is used by the <code class="literal">check-abi</code> target described above.
|
||||
The files are usually re-generated by target maintainers for releases.
|
||||
</p></dd><dt><span class="term"><strong class="userinput"><code>
|
||||
make check-compile
|
||||
</pre><p>
|
||||
</code></strong></span></dt><dd><p>
|
||||
This rule compiles, but does not link or execute, the
|
||||
<span class="emphasis"><em>testsuite_files</em></span> test cases and displays the
|
||||
<code class="filename">testsuite_files</code> test cases and displays the
|
||||
output on stdout.
|
||||
</p><pre class="programlisting">
|
||||
</p></dd><dt><span class="term"><strong class="userinput"><code>
|
||||
make check-performance
|
||||
</pre><p>
|
||||
</code></strong></span></dt><dd><p>
|
||||
This rule runs through the
|
||||
<span class="emphasis"><em>testsuite_files_performance</em></span> test cases and
|
||||
<code class="filename">testsuite_files_performance</code> test cases and
|
||||
collects information for performance analysis and can be used to
|
||||
spot performance regressions. Various timing information is
|
||||
collected, as well as number of hard page faults, and memory
|
||||
used. This is not run by default, and the implementation is in
|
||||
flux.
|
||||
</p><p>
|
||||
</p></dd><dt><span class="term"><strong class="userinput"><code>
|
||||
make check-debug
|
||||
</code></strong></span></dt><dd><p>
|
||||
This rule runs through the test suite under the
|
||||
<a class="link" href="debug_mode.html" title="Chapter 17. Debug Mode">debug mode</a>.
|
||||
</p></dd><dt><span class="term"><strong class="userinput"><code>
|
||||
make check-parallel
|
||||
</code></strong></span></dt><dd><p>
|
||||
This rule runs through the test suite under the
|
||||
<a class="link" href="parallel_mode.html" title="Chapter 18. Parallel Mode">parallel mode</a>.
|
||||
</p></dd></dl></div><p>
|
||||
We are interested in any strange failures of the testsuite;
|
||||
please email the main libstdc++ mailing list if you see
|
||||
something odd or have questions.
|
||||
</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="test.run.permutations"></a>Permutations</h4></div></div></div><p>
|
||||
To run the libstdc++ test suite under the <a class="link" href="debug_mode.html" title="Chapter 17. Debug Mode">debug mode</a>, edit
|
||||
<code class="filename">libstdc++-v3/scripts/testsuite_flags</code> to add the
|
||||
compile-time flag <code class="constant">-D_GLIBCXX_DEBUG</code> to the
|
||||
result printed by the <code class="literal">--build-cxx</code>
|
||||
The tests will be compiled with a set of default compiler flags defined
|
||||
by the
|
||||
<code class="filename"><em class="replaceable"><code>libbuildir</code></em>/scripts/testsuite_flags</code>
|
||||
file, as well as options specified in individual tests. You can run
|
||||
the tests with different options by adding them to the output of
|
||||
the <code class="option">--cxxflags</code> option of that script, or by setting
|
||||
the <code class="varname">CXXFLAGS</code> variable when running
|
||||
<span class="command"><strong>make</strong></span>, or via options for the DejaGnu test framework
|
||||
(described below). The latter approach uses the
|
||||
<code class="option">--target_board</code> option that was shown earlier.
|
||||
For example, to run the tests with <code class="option">-O1 -D_GLIBCXX_ASSERT</code>
|
||||
you could use:
|
||||
</p><pre class="programlisting"> make RUNTESTFLAGS=--target_board=unix/-O1/-D_GLIBCXX_ASSERTIONS</pre><p>
|
||||
</p><p>
|
||||
The <code class="option">--target_board</code> option can also be used to run the
|
||||
tests multiple times in different variations. For example, to run the
|
||||
entire testsuite three times using <code class="option">-O3</code> but with
|
||||
different <code class="option">-std</code> options:
|
||||
</p><pre class="programlisting"> make 'RUNTESTFLAGS=--target_board=unix/-O3\"{-std=gnu++98,-std=gnu++11,-std=gnu++14}\"'</pre><p>
|
||||
N.B. that set of variations could also be written as
|
||||
<code class="literal">unix/-O3\"{-std=gnu++98,-std=gnu++11,}\"</code> so that
|
||||
the third variation would use the default for <code class="option">-std</code>
|
||||
(which is <code class="option">-std=gnu++14</code> as of GCC 6).
|
||||
</p><p>
|
||||
To run the libstdc++ test suite under the
|
||||
<a class="link" href="debug_mode.html" title="Chapter 17. Debug Mode">debug mode</a>, use
|
||||
<strong class="userinput"><code>make check-debug</code></strong>. Alternatively, edit
|
||||
<code class="filename"><em class="replaceable"><code>libbuildir</code></em>/scripts/testsuite_flags</code>
|
||||
to add the compile-time flag <code class="option">-D_GLIBCXX_DEBUG</code> to the
|
||||
result printed by the <code class="option">--cxxflags</code>
|
||||
option. Additionally, add the
|
||||
<code class="constant">-D_GLIBCXX_DEBUG_PEDANTIC</code> flag to turn on
|
||||
<code class="option">-D_GLIBCXX_DEBUG_PEDANTIC</code> flag to turn on
|
||||
pedantic checking. The libstdc++ test suite should produce
|
||||
precisely the same results under debug mode that it does under
|
||||
release mode: any deviation indicates an error in either the
|
||||
library or the test suite.
|
||||
the same results under debug mode that it does under release mode:
|
||||
any deviation indicates an error in either the library or the test suite.
|
||||
Note, however, that the number of tests that PASS may change, because
|
||||
some test cases are skipped in normal mode, and some are skipped in
|
||||
debug mode, as determined by the
|
||||
<code class="literal">dg-require-<em class="replaceable"><code>support</code></em></code>
|
||||
directives described below.
|
||||
</p><p>
|
||||
The <a class="link" href="parallel_mode.html" title="Chapter 18. Parallel Mode">parallel
|
||||
mode</a> can be tested in much the same manner, substituting
|
||||
<code class="constant">-D_GLIBCXX_PARALLEL</code> for
|
||||
<code class="constant">-D_GLIBCXX_DEBUG</code> in the previous paragraph.
|
||||
mode</a> can be tested using
|
||||
<strong class="userinput"><code>make check-parallel</code></strong>, or in much the same manner
|
||||
as the debug mode, substituting
|
||||
<code class="option">-D_GLIBCXX_PARALLEL</code> for
|
||||
<code class="option">-D_GLIBCXX_DEBUG</code> in the previous paragraph.
|
||||
</p><p>
|
||||
Or, just run the testsuites with <code class="constant">CXXFLAGS</code>
|
||||
set to <code class="constant">-D_GLIBCXX_DEBUG</code> or
|
||||
<code class="constant">-D_GLIBCXX_PARALLEL</code>.
|
||||
Or, just run the testsuite
|
||||
<code class="option">-D_GLIBCXX_DEBUG</code> or <code class="option">-D_GLIBCXX_PARALLEL</code>
|
||||
in <code class="varname">CXXFLAGS</code> or <code class="varname">RUNTESTFLAGS</code>.
|
||||
</p></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="test.new_tests"></a>Writing a new test case</h3></div></div></div><p>
|
||||
The first step in making a new test case is to choose the correct
|
||||
directory and file name, given the organization as previously
|
||||
|
@ -311,10 +370,15 @@ runtest --tool libstdc++ --srcdir=/path/to/gcc/libstdc++-v3/testsuite
|
|||
</p><p>
|
||||
All files are copyright the FSF, and GPL'd: this is very
|
||||
important. The first copyright year should correspond to the date
|
||||
the file was checked in to SVN.
|
||||
the file was checked in to version control. If a test is copied from
|
||||
an existing file it should retain the copyright years from the
|
||||
original file.
|
||||
</p><p>
|
||||
As per the dejagnu instructions, always return 0 from main to
|
||||
indicate success.
|
||||
The DejaGnu instructions say to always return <code class="literal">0</code>
|
||||
from <code class="function">main</code> to indicate success. Strictly speaking
|
||||
this is redundant in C++, since returning from <code class="function">main</code>
|
||||
is defined to return <code class="literal">0</code>. Most tests still have an
|
||||
explicit return.
|
||||
</p><p>
|
||||
A bunch of utility functions and classes have already been
|
||||
abstracted out into the testsuite utility library, <code class="code">
|
||||
|
@ -322,108 +386,165 @@ runtest --tool libstdc++ --srcdir=/path/to/gcc/libstdc++-v3/testsuite
|
|||
appropriate header file: the library or specific object files will
|
||||
automatically be linked in as part of the testsuite run.
|
||||
</p><p>
|
||||
For a test that needs to take advantage of the dejagnu test
|
||||
harness, what follows below is a list of special keyword that
|
||||
harness uses. Basically, a test case contains dg-keywords (see
|
||||
dg.exp) indicating what to do and what kinds of behavior are to be
|
||||
expected. New test cases should be written with the new style
|
||||
DejaGnu framework in mind.
|
||||
Tests that need to perform runtime checks should use the
|
||||
<code class="literal">VERIFY</code> macro, defined in the
|
||||
<code class="filename"><testsuite_hooks.h></code> header.
|
||||
This usually expands to the standard <code class="literal">assert</code> macro, but
|
||||
allows targets to define it to something different. In order to support
|
||||
the alternative expansions of <code class="literal">VERIFY</code>, before any
|
||||
use of the macro there must be a variable called <code class="varname">test</code>
|
||||
in scope, which is usually defined like so (the attribute avoids
|
||||
warnings about an unused variable):
|
||||
</p><pre class="programlisting">
|
||||
bool test __attribute__((unused)) = true;
|
||||
</pre><p>
|
||||
</p><p>
|
||||
To ease transition, here is the list of dg-keyword documentation
|
||||
lifted from dg.exp.
|
||||
</p><pre class="programlisting">
|
||||
# The currently supported options are:
|
||||
#
|
||||
# dg-prms-id N
|
||||
# set prms_id to N
|
||||
#
|
||||
# dg-options "options ..." [{ target selector }]
|
||||
# specify special options to pass to the tool (eg: compiler)
|
||||
#
|
||||
# dg-do do-what-keyword [{ target/xfail selector }]
|
||||
# `do-what-keyword' is tool specific and is passed unchanged to
|
||||
# ${tool}-dg-test. An example is gcc where `keyword' can be any of:
|
||||
# preprocess|compile|assemble|link|run
|
||||
# and will do one of: produce a .i, produce a .s, produce a .o,
|
||||
# produce an a.out, or produce an a.out and run it (the default is
|
||||
# compile).
|
||||
#
|
||||
# dg-error regexp comment [{ target/xfail selector } [{.|0|linenum}]]
|
||||
# indicate an error message <regexp> is expected on this line
|
||||
# (the test fails if it doesn't occur)
|
||||
# Linenum=0 for general tool messages (eg: -V arg missing).
|
||||
# "." means the current line.
|
||||
#
|
||||
# dg-warning regexp comment [{ target/xfail selector } [{.|0|linenum}]]
|
||||
# indicate a warning message <regexp> is expected on this line
|
||||
# (the test fails if it doesn't occur)
|
||||
#
|
||||
# dg-bogus regexp comment [{ target/xfail selector } [{.|0|linenum}]]
|
||||
# indicate a bogus error message <regexp> use to occur here
|
||||
# (the test fails if it does occur)
|
||||
#
|
||||
# dg-build regexp comment [{ target/xfail selector }]
|
||||
# indicate the build use to fail for some reason
|
||||
# (errors covered here include bad assembler generated, tool crashes,
|
||||
# and link failures)
|
||||
# (the test fails if it does occur)
|
||||
#
|
||||
# dg-excess-errors comment [{ target/xfail selector }]
|
||||
# indicate excess errors are expected (any line)
|
||||
# (this should only be used sparingly and temporarily)
|
||||
#
|
||||
# dg-output regexp [{ target selector }]
|
||||
# indicate the expected output of the program is <regexp>
|
||||
# (there may be multiple occurrences of this, they are concatenated)
|
||||
#
|
||||
# dg-final { tcl code }
|
||||
# add some tcl code to be run at the end
|
||||
# (there may be multiple occurrences of this, they are concatenated)
|
||||
# (unbalanced braces must be \-escaped)
|
||||
#
|
||||
# "{ target selector }" is a list of expressions that determine whether the
|
||||
# test succeeds or fails for a particular target, or in some cases whether the
|
||||
# option applies for a particular target. If the case of `dg-do' it specifies
|
||||
# whether the test case is even attempted on the specified target.
|
||||
#
|
||||
# The target selector is always optional. The format is one of:
|
||||
#
|
||||
# { xfail *-*-* ... } - the test is expected to fail for the given targets
|
||||
# { target *-*-* ... } - the option only applies to the given targets
|
||||
#
|
||||
# At least one target must be specified, use *-*-* for "all targets".
|
||||
# At present it is not possible to specify both `xfail' and `target'.
|
||||
# "native" may be used in place of "*-*-*".
|
||||
The testsuite uses the DejaGnu framework to compile and run the tests.
|
||||
Test cases are normal C++ files which contain special directives in
|
||||
comments. These directives look like <code class="literal">{ dg-* ... }</code>
|
||||
and tell DejaGnu what to do and what kinds of behavior are to be expected
|
||||
for a test. The core DejaGnu directives are documented in the
|
||||
<code class="filename">dg.exp</code> file installed by DejaGnu.
|
||||
The GCC testsuites support additional directives
|
||||
as described in the GCC internals documentation, see <a class="link" href="https://gcc.gnu.org/onlinedocs/gccint/Directives.html" target="_top">Syntax
|
||||
and Descriptions of test directives</a>. GCC also defines many <a class="link" href="https://gcc.gnu.org/onlinedocs/gccint/Effective-Target-Keywords.html" target="_top">
|
||||
Keywords describing target attributes</a> (a.k.a effective targets)
|
||||
which can be used where a target <em class="replaceable"><code>selector</code></em> can
|
||||
appear.
|
||||
</p><p>
|
||||
Some directives commonly used in the libstdc++ testsuite are:
|
||||
|
||||
Example 1: Testing compilation only
|
||||
</p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="literal">{ dg-do <em class="replaceable"><code>do-what-keyword</code></em> [{ target/xfail <em class="replaceable"><code>selector</code></em> }] }</code></span></dt><dd>Where <em class="replaceable"><code>do-what-keyword</code></em> is usually
|
||||
one of <code class="literal">run</code> (which is the default),
|
||||
<code class="literal">compile</code>, or <code class="literal">link</code>,
|
||||
and typical selectors are targets such as <code class="literal">*-*-gnu*</code>
|
||||
or an effective target such as <code class="literal">c++11</code>.
|
||||
</dd><dt><span class="term"><code class="literal">{ dg-require-<em class="replaceable"><code>support</code></em> args }</code></span></dt><dd>Skip the test if the target does not provide the required support.
|
||||
See below for values of <em class="replaceable"><code>support</code></em>.
|
||||
</dd><dt><span class="term"><code class="literal">{ dg-options <em class="replaceable"><code>options</code></em> [{ target <em class="replaceable"><code>selector</code></em> }] }</code></span></dt><dd></dd><dt><span class="term"><code class="literal">{ dg-error <em class="replaceable"><code>regexp</code></em> [ <em class="replaceable"><code>comment</code></em> [{ target/xfail <em class="replaceable"><code>selector</code></em> } [<em class="replaceable"><code>line</code></em>] ]] }</code></span></dt><dd></dd><dt><span class="term"><code class="literal">{ dg-excess-errors <em class="replaceable"><code>comment</code></em> [{ target/xfail <em class="replaceable"><code>selector</code></em> }] }</code></span></dt><dd></dd></dl></div><p>
|
||||
For full details of these and other directives see the main GCC DejaGnu
|
||||
documentation in the internals manual.
|
||||
</p><p>
|
||||
Test cases that use features of a particular C++ standard should specify
|
||||
the minimum required standard as an effective target:
|
||||
</p><pre class="programlisting"> // { dg-do run { target c++11 } }</pre><p>
|
||||
or
|
||||
</p><pre class="programlisting"> // { dg-require-effective-target c++11 }</pre><p>
|
||||
Specifying the minimum required standard for a test allows it to be run
|
||||
using later standards, so that we can verify that C++11 components still
|
||||
work correctly when compiled as C++14 or later. Specifying a minimum also
|
||||
means the test will be skipped if the test is compiled using
|
||||
an older standard, e.g. using
|
||||
<code class="option">RUNTESTFLAGS=--target_board=unix/-std=gnu++98</code>.
|
||||
</p><p>
|
||||
It is possible to indicate that a test should <span class="emphasis"><em>only</em></span>
|
||||
be run for a specific standard (and not later standards) using an
|
||||
effective target like <code class="literal">c++11_only</code>. However, this means
|
||||
the test will be skipped by default (because the default mode is
|
||||
<code class="literal">gnu++14</code>), and so will only run when
|
||||
<code class="option">-std=gnu++11</code> or <code class="option">-std=c++11</code> is used
|
||||
explicitly. For tests that require a specific standard it is better to
|
||||
use a <code class="literal">dg-options</code> directive:
|
||||
</p><pre class="programlisting"> // { dg-options "-std=gnu++11" }</pre><p>
|
||||
This means the test will not get skipped by default, and will always use
|
||||
the specific standard dialect that the test requires. This isn't needed
|
||||
often, and most tests should use an effective target to specify a
|
||||
minimum standard instead, to allow them to be tested for all
|
||||
possible variations.
|
||||
</p><p>
|
||||
Similarly, tests which depend on a newer standard than the default
|
||||
should use <code class="literal">dg-options</code> instead of an effective target,
|
||||
so that they are not skipped by default.
|
||||
For example, tests for C++17 features should use
|
||||
</p><pre class="programlisting"> // { dg-options "-std=gnu++17" }</pre><p>
|
||||
and not
|
||||
</p><pre class="programlisting"> // { dg-do run "c++1z" }</pre><p>
|
||||
</p><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="tests.dg.examples"></a>Examples of Test Directives</h4></div></div></div><p>
|
||||
Example 1: Testing compilation only:
|
||||
</p><pre class="programlisting">
|
||||
// { dg-do compile }
|
||||
</pre><p>
|
||||
|
||||
Example 2: Testing for expected warnings on line 36, which all targets fail
|
||||
Example 2: Testing for expected warnings on line 36, which all targets fail:
|
||||
</p><pre class="programlisting">
|
||||
// { dg-warning "string literals" "" { xfail *-*-* } 36 }
|
||||
</pre><p>
|
||||
|
||||
Example 3: Testing for expected warnings on line 36
|
||||
Example 3: Testing for expected warnings on line 36:
|
||||
</p><pre class="programlisting">
|
||||
// { dg-warning "string literals" "" { target *-*-* } 36 }
|
||||
</pre><p>
|
||||
|
||||
Example 4: Testing for compilation errors on line 41
|
||||
Example 4: Testing for compilation errors on line 41:
|
||||
</p><pre class="programlisting">
|
||||
// { dg-do compile }
|
||||
// { dg-error "no match for" "" { target *-*-* } 41 }
|
||||
</pre><p>
|
||||
|
||||
Example 5: Testing with special command line settings, or without the
|
||||
use of pre-compiled headers, in particular the stdc++.h.gch file. Any
|
||||
options here will override the DEFAULT_CXXFLAGS and PCH_CXXFLAGS set
|
||||
up in the normal.exp file.
|
||||
use of pre-compiled headers, in particular the
|
||||
<code class="filename">stdc++.h.gch</code> file. Any
|
||||
options here will override the <code class="varname">DEFAULT_CXXFLAGS</code> and
|
||||
<code class="varname">PCH_CXXFLAGS</code> set up in the <code class="filename">normal.exp</code>
|
||||
file:
|
||||
</p><pre class="programlisting">
|
||||
// { dg-options "-O0" { target *-*-* } }
|
||||
</pre><p>
|
||||
More examples can be found in the libstdc++-v3/testsuite/*/*.cc files.
|
||||
</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="test.harness"></a>Test Harness and Utilities</h3></div></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="test.harness.dejagnu"></a>Dejagnu Harness Details</h4></div></div></div><p>
|
||||
|
||||
Example 6: Compiling and linking a test only for C++14 and later, and only
|
||||
if Debug Mode is active:
|
||||
</p><pre class="programlisting">
|
||||
// { dg-do link { target c++14 } }
|
||||
// { dg-require-debug-mode "" }
|
||||
</pre><p>
|
||||
|
||||
Example 7: Running a test only on x86 targets, and only for C++11 and later,
|
||||
with specific options, and additional options for 32-bit x86:
|
||||
</p><pre class="programlisting">
|
||||
// { dg-options "-fstrict-enums" }
|
||||
// { dg-additional-options "-march=i486" { target ia32 } }
|
||||
// { dg-do run { target { ia32 || x86_64-*-* } } }
|
||||
// { dg-require-effective-target "c++11" }
|
||||
</pre><p>
|
||||
</p><p>
|
||||
More examples can be found in the
|
||||
<code class="filename">libstdc++-v3/testsuite/*/*.cc</code> files.
|
||||
</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="tests.dg.directives"></a>Directives Specific to Libstdc++ Tests</h4></div></div></div><p>
|
||||
In addition to the usual <a class="link" href="https://gcc.gnu.org/onlinedocs/gccint/Require-support.html" target="_top">Variants
|
||||
of <code class="literal">dg-require-<em class="replaceable"><code>support</code></em></code></a>
|
||||
several more directives are available for use in libstdc++ tests,
|
||||
including the following:
|
||||
</p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="literal">dg-require-namedlocale</code> <em class="replaceable"><code>name</code></em></span></dt><dd><p>The named locale must be available.
|
||||
</p></dd><dt><span class="term"><code class="literal">dg-require-debug-mode ""</code></span></dt><dd><p>Skip the test if the Debug Mode is not active
|
||||
(as determined by the <code class="literal">_GLIBCXX_DEBUG</code> macro).
|
||||
</p></dd><dt><span class="term"><code class="literal">dg-require-parallel-mode ""</code></span></dt><dd><p>Skip the test if the Parallel Mode is not active
|
||||
(as determined by the <code class="literal">_GLIBCXX_PARALLEL</code> macro).
|
||||
</p></dd><dt><span class="term"><code class="literal">dg-require-profile-mode ""</code></span></dt><dd><p>Skip the test if the Profile Mode is not active
|
||||
(as determined by the <code class="literal">_GLIBCXX_PROFILE</code> macro).
|
||||
</p></dd><dt><span class="term"><code class="literal">dg-require-normal-mode ""</code></span></dt><dd><p>Skip the test if any of Debug, Parallel or Profile
|
||||
Mode is active.
|
||||
</p></dd><dt><span class="term"><code class="literal">dg-require-atomic-builtins ""</code></span></dt><dd><p>Skip the test if atomic operations on <span class="type">bool</span>
|
||||
and <span class="type">int</span> are not lock-free.
|
||||
</p></dd><dt><span class="term"><code class="literal">dg-require-gthreads ""</code></span></dt><dd><p>Skip the test if the C++11 thread library is not
|
||||
supported, as determined by the <code class="literal">_GLIBCXX_HAS_GTHREADS</code>
|
||||
macro.
|
||||
</p></dd><dt><span class="term"><code class="literal">dg-require-gthreads-timed ""</code></span></dt><dd><p>Skip the test if C++11 timed mutexes are not supported,
|
||||
as determined by the <code class="literal">_GLIBCXX_HAS_GTHREADS</code> and
|
||||
<code class="literal">_GTHREAD_USE_MUTEX_TIMEDLOCK</code> macros.
|
||||
</p></dd><dt><span class="term"><code class="literal">dg-require-string-conversions ""</code></span></dt><dd><p>Skip the test if the C++11 <code class="function">to_string</code>
|
||||
and <code class="function">stoi</code>, <code class="function">stod</code> etc. functions
|
||||
are not fully supported (including wide character versions).
|
||||
</p></dd><dt><span class="term"><code class="literal">dg-require-filesystem-ts ""</code></span></dt><dd><p>Skip the test if the Filesystem TS is not supported.
|
||||
</p></dd></dl></div></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="test.harness"></a>Test Harness and Utilities</h3></div></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="test.harness.dejagnu"></a>DejaGnu Harness Details</h4></div></div></div><p>
|
||||
Underlying details of testing for conformance and regressions are
|
||||
abstracted via the GNU Dejagnu package. This is similar to the
|
||||
abstracted via the GNU DejaGnu package. This is similar to the
|
||||
rest of GCC.
|
||||
</p><p>This is information for those looking at making changes to the testsuite
|
||||
structure, and/or needing to trace dejagnu's actions with --verbose. This
|
||||
will not be useful to people who are "merely" adding new tests to the existing
|
||||
structure.
|
||||
</p><p>The first key point when working with dejagnu is the idea of a "tool".
|
||||
structure, and/or needing to trace DejaGnu's actions with
|
||||
<code class="option">--verbose</code>.
|
||||
This will not be useful to people who are "merely" adding new tests
|
||||
to the existing structure.
|
||||
</p><p>The first key point when working with DejaGnu is the idea of a "tool".
|
||||
Files, directories, and functions are all implicitly used when they are
|
||||
named after the tool in use. Here, the tool will always be "libstdc++".
|
||||
</p><p>The <code class="code">lib</code> subdir contains support routines. The
|
||||
|
@ -433,7 +554,7 @@ be copied from the core compiler's support directory into <code class="code">lib
|
|||
</p><p>Some routines in <code class="code">lib/libstdc++.exp</code> are callbacks, some are
|
||||
our own. Callbacks must be prefixed with the name of the tool. To easily
|
||||
distinguish the others, by convention our own routines are named "v3-*".
|
||||
</p><p>The next key point when working with dejagnu is "test files". Any
|
||||
</p><p>The next key point when working with DejaGnu is "test files". Any
|
||||
directory whose name starts with the tool name will be searched for test files.
|
||||
(We have only one.) In those directories, any <code class="code">.exp</code> file is
|
||||
considered a test file, and will be run in turn. Our main test file is called
|
||||
|
|
|
@ -554,29 +554,65 @@ cat 27_io/objects/char/3_xin.in | a.out</programlisting>
|
|||
<section xml:id="test.run.permutations"><info><title>Permutations</title></info>
|
||||
|
||||
<para>
|
||||
To run the libstdc++ test suite under the <link linkend="manual.ext.debug_mode">debug mode</link>, edit
|
||||
<filename>libstdc++-v3/scripts/testsuite_flags</filename> to add the
|
||||
compile-time flag <constant>-D_GLIBCXX_DEBUG</constant> to the
|
||||
result printed by the <literal>--build-cxx</literal>
|
||||
The tests will be compiled with a set of default compiler flags defined
|
||||
by the
|
||||
<filename><replaceable>libbuildir</replaceable>/scripts/testsuite_flags</filename>
|
||||
file, as well as options specified in individual tests. You can run
|
||||
the tests with different options by adding them to the output of
|
||||
the <option>--cxxflags</option> option of that script, or by setting
|
||||
the <varname>CXXFLAGS</varname> variable when running
|
||||
<command>make</command>, or via options for the DejaGnu test framework
|
||||
(described below). The latter approach uses the
|
||||
<option>--target_board</option> option that was shown earlier.
|
||||
For example, to run the tests with <option>-O1 -D_GLIBCXX_ASSERT</option>
|
||||
you could use:
|
||||
<programlisting> make RUNTESTFLAGS=--target_board=unix/-O1/-D_GLIBCXX_ASSERTIONS</programlisting>
|
||||
</para>
|
||||
|
||||
<para>
|
||||
The <option>--target_board</option> option can also be used to run the
|
||||
tests multiple times in different variations. For example, to run the
|
||||
entire testsuite three times using <option>-O3</option> but with
|
||||
different <option>-std</option> options:
|
||||
<programlisting> make 'RUNTESTFLAGS=--target_board=unix/-O3\"{-std=gnu++98,-std=gnu++11,-std=gnu++14}\"'</programlisting>
|
||||
N.B. that set of variations could also be written as
|
||||
<literal>unix/-O3\"{-std=gnu++98,-std=gnu++11,}\"</literal> so that
|
||||
the third variation would use the default for <option>-std</option>
|
||||
(which is <option>-std=gnu++14</option> as of GCC 6).
|
||||
</para>
|
||||
|
||||
<para>
|
||||
To run the libstdc++ test suite under the
|
||||
<link linkend="manual.ext.debug_mode">debug mode</link>, use
|
||||
<userinput>make check-debug</userinput>. Alternatively, edit
|
||||
<filename><replaceable>libbuildir</replaceable>/scripts/testsuite_flags</filename>
|
||||
to add the compile-time flag <option>-D_GLIBCXX_DEBUG</option> to the
|
||||
result printed by the <option>--cxxflags</option>
|
||||
option. Additionally, add the
|
||||
<constant>-D_GLIBCXX_DEBUG_PEDANTIC</constant> flag to turn on
|
||||
<option>-D_GLIBCXX_DEBUG_PEDANTIC</option> flag to turn on
|
||||
pedantic checking. The libstdc++ test suite should produce
|
||||
precisely the same results under debug mode that it does under
|
||||
release mode: any deviation indicates an error in either the
|
||||
library or the test suite.
|
||||
the same results under debug mode that it does under release mode:
|
||||
any deviation indicates an error in either the library or the test suite.
|
||||
Note, however, that the number of tests that PASS may change, because
|
||||
some test cases are skipped in normal mode, and some are skipped in
|
||||
debug mode, as determined by the
|
||||
<literal>dg-require-<replaceable>support</replaceable></literal>
|
||||
directives described below.
|
||||
</para>
|
||||
|
||||
<para>
|
||||
The <link linkend="manual.ext.parallel_mode">parallel
|
||||
mode</link> can be tested in much the same manner, substituting
|
||||
<constant>-D_GLIBCXX_PARALLEL</constant> for
|
||||
<constant>-D_GLIBCXX_DEBUG</constant> in the previous paragraph.
|
||||
mode</link> can be tested using
|
||||
<userinput>make check-parallel</userinput>, or in much the same manner
|
||||
as the debug mode, substituting
|
||||
<option>-D_GLIBCXX_PARALLEL</option> for
|
||||
<option>-D_GLIBCXX_DEBUG</option> in the previous paragraph.
|
||||
</para>
|
||||
|
||||
<para>
|
||||
Or, just run the testsuites with <constant>CXXFLAGS</constant>
|
||||
set to <constant>-D_GLIBCXX_DEBUG</constant> or
|
||||
<constant>-D_GLIBCXX_PARALLEL</constant>.
|
||||
Or, just run the testsuite
|
||||
<option>-D_GLIBCXX_DEBUG</option> or <option>-D_GLIBCXX_PARALLEL</option>
|
||||
in <varname>CXXFLAGS</varname> or <varname>RUNTESTFLAGS</varname>.
|
||||
</para>
|
||||
</section>
|
||||
</section>
|
||||
|
@ -593,12 +629,17 @@ cat 27_io/objects/char/3_xin.in | a.out</programlisting>
|
|||
<para>
|
||||
All files are copyright the FSF, and GPL'd: this is very
|
||||
important. The first copyright year should correspond to the date
|
||||
the file was checked in to SVN.
|
||||
the file was checked in to version control. If a test is copied from
|
||||
an existing file it should retain the copyright years from the
|
||||
original file.
|
||||
</para>
|
||||
|
||||
<para>
|
||||
As per the dejagnu instructions, always return 0 from main to
|
||||
indicate success.
|
||||
The DejaGnu instructions say to always return <literal>0</literal>
|
||||
from <function>main</function> to indicate success. Strictly speaking
|
||||
this is redundant in C++, since returning from <function>main</function>
|
||||
is defined to return <literal>0</literal>. Most tests still have an
|
||||
explicit return.
|
||||
</para>
|
||||
|
||||
<para>
|
||||
|
@ -610,109 +651,238 @@ cat 27_io/objects/char/3_xin.in | a.out</programlisting>
|
|||
</para>
|
||||
|
||||
<para>
|
||||
For a test that needs to take advantage of the dejagnu test
|
||||
harness, what follows below is a list of special keyword that
|
||||
harness uses. Basically, a test case contains dg-keywords (see
|
||||
dg.exp) indicating what to do and what kinds of behavior are to be
|
||||
expected. New test cases should be written with the new style
|
||||
DejaGnu framework in mind.
|
||||
Tests that need to perform runtime checks should use the
|
||||
<literal>VERIFY</literal> macro, defined in the
|
||||
<filename class="headerfile"><testsuite_hooks.h></filename> header.
|
||||
This usually expands to the standard <literal>assert</literal> macro, but
|
||||
allows targets to define it to something different. In order to support
|
||||
the alternative expansions of <literal>VERIFY</literal>, before any
|
||||
use of the macro there must be a variable called <varname>test</varname>
|
||||
in scope, which is usually defined like so (the attribute avoids
|
||||
warnings about an unused variable):
|
||||
<programlisting>
|
||||
bool test __attribute__((unused)) = true;
|
||||
</programlisting>
|
||||
</para>
|
||||
|
||||
<para>
|
||||
To ease transition, here is the list of dg-keyword documentation
|
||||
lifted from dg.exp.
|
||||
</para>
|
||||
The testsuite uses the DejaGnu framework to compile and run the tests.
|
||||
Test cases are normal C++ files which contain special directives in
|
||||
comments. These directives look like <literal>{ dg-* ... }</literal>
|
||||
and tell DejaGnu what to do and what kinds of behavior are to be expected
|
||||
for a test. The core DejaGnu directives are documented in the
|
||||
<filename>dg.exp</filename> file installed by DejaGnu.
|
||||
The GCC testsuites support additional directives
|
||||
as described in the GCC internals documentation, see <link
|
||||
xmlns:xlink="http://www.w3.org/1999/xlink"
|
||||
xlink:href="https://gcc.gnu.org/onlinedocs/gccint/Directives.html">Syntax
|
||||
and Descriptions of test directives</link>. GCC also defines many <link
|
||||
xmlns:xlink="http://www.w3.org/1999/xlink"
|
||||
xlink:href="https://gcc.gnu.org/onlinedocs/gccint/Effective-Target-Keywords.html">
|
||||
Keywords describing target attributes</link> (a.k.a effective targets)
|
||||
which can be used where a target <replaceable>selector</replaceable> can
|
||||
appear.
|
||||
</para>
|
||||
|
||||
<para>
|
||||
Some directives commonly used in the libstdc++ testsuite are:
|
||||
|
||||
<variablelist>
|
||||
<varlistentry>
|
||||
<term><literal>{ dg-do <replaceable>do-what-keyword</replaceable> [{ target/xfail <replaceable>selector</replaceable> }] }</literal></term>
|
||||
<listitem>Where <replaceable>do-what-keyword</replaceable> is usually
|
||||
one of <literal>run</literal> (which is the default),
|
||||
<literal>compile</literal>, or <literal>link</literal>,
|
||||
and typical selectors are targets such as <literal>*-*-gnu*</literal>
|
||||
or an effective target such as <literal>c++11</literal>.
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
<varlistentry>
|
||||
<term><literal>{ dg-require-<replaceable>support</replaceable> args }</literal></term>
|
||||
<listitem>Skip the test if the target does not provide the required support.
|
||||
See below for values of <replaceable>support</replaceable>.
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
<varlistentry>
|
||||
<term><literal>{ dg-options <replaceable>options</replaceable> [{ target <replaceable>selector</replaceable> }] }</literal></term>
|
||||
</varlistentry>
|
||||
<varlistentry>
|
||||
<term><literal>{ dg-error <replaceable>regexp</replaceable> [ <replaceable>comment</replaceable> [{ target/xfail <replaceable>selector</replaceable> } [<replaceable>line</replaceable>] ]] }</literal></term>
|
||||
</varlistentry>
|
||||
<varlistentry>
|
||||
<term><literal>{ dg-excess-errors <replaceable>comment</replaceable> [{ target/xfail <replaceable>selector</replaceable> }] }</literal></term>
|
||||
</varlistentry>
|
||||
</variablelist>
|
||||
For full details of these and other directives see the main GCC DejaGnu
|
||||
documentation in the internals manual.
|
||||
</para>
|
||||
|
||||
<para>
|
||||
Test cases that use features of a particular C++ standard should specify
|
||||
the minimum required standard as an effective target:
|
||||
<programlisting> // { dg-do run { target c++11 } }</programlisting>
|
||||
or
|
||||
<programlisting> // { dg-require-effective-target c++11 }</programlisting>
|
||||
Specifying the minimum required standard for a test allows it to be run
|
||||
using later standards, so that we can verify that C++11 components still
|
||||
work correctly when compiled as C++14 or later. Specifying a minimum also
|
||||
means the test will be skipped if the test is compiled using
|
||||
an older standard, e.g. using
|
||||
<option>RUNTESTFLAGS=--target_board=unix/-std=gnu++98</option>.
|
||||
</para>
|
||||
|
||||
<para>
|
||||
It is possible to indicate that a test should <emphasis>only</emphasis>
|
||||
be run for a specific standard (and not later standards) using an
|
||||
effective target like <literal>c++11_only</literal>. However, this means
|
||||
the test will be skipped by default (because the default mode is
|
||||
<literal>gnu++14</literal>), and so will only run when
|
||||
<option>-std=gnu++11</option> or <option>-std=c++11</option> is used
|
||||
explicitly. For tests that require a specific standard it is better to
|
||||
use a <literal>dg-options</literal> directive:
|
||||
<programlisting> // { dg-options "-std=gnu++11" }</programlisting>
|
||||
This means the test will not get skipped by default, and will always use
|
||||
the specific standard dialect that the test requires. This isn't needed
|
||||
often, and most tests should use an effective target to specify a
|
||||
minimum standard instead, to allow them to be tested for all
|
||||
possible variations.
|
||||
</para>
|
||||
|
||||
<para>
|
||||
Similarly, tests which depend on a newer standard than the default
|
||||
should use <literal>dg-options</literal> instead of an effective target,
|
||||
so that they are not skipped by default.
|
||||
For example, tests for C++17 features should use
|
||||
<programlisting> // { dg-options "-std=gnu++17" }</programlisting>
|
||||
and not
|
||||
<programlisting> // { dg-do run "c++1z" }</programlisting>
|
||||
</para>
|
||||
|
||||
<section xml:id="tests.dg.examples"><info><title>Examples of Test Directives</title></info>
|
||||
|
||||
<para>
|
||||
Example 1: Testing compilation only:
|
||||
<programlisting>
|
||||
# The currently supported options are:
|
||||
#
|
||||
# dg-prms-id N
|
||||
# set prms_id to N
|
||||
#
|
||||
# dg-options "options ..." [{ target selector }]
|
||||
# specify special options to pass to the tool (eg: compiler)
|
||||
#
|
||||
# dg-do do-what-keyword [{ target/xfail selector }]
|
||||
# `do-what-keyword' is tool specific and is passed unchanged to
|
||||
# ${tool}-dg-test. An example is gcc where `keyword' can be any of:
|
||||
# preprocess|compile|assemble|link|run
|
||||
# and will do one of: produce a .i, produce a .s, produce a .o,
|
||||
# produce an a.out, or produce an a.out and run it (the default is
|
||||
# compile).
|
||||
#
|
||||
# dg-error regexp comment [{ target/xfail selector } [{.|0|linenum}]]
|
||||
# indicate an error message <regexp> is expected on this line
|
||||
# (the test fails if it doesn't occur)
|
||||
# Linenum=0 for general tool messages (eg: -V arg missing).
|
||||
# "." means the current line.
|
||||
#
|
||||
# dg-warning regexp comment [{ target/xfail selector } [{.|0|linenum}]]
|
||||
# indicate a warning message <regexp> is expected on this line
|
||||
# (the test fails if it doesn't occur)
|
||||
#
|
||||
# dg-bogus regexp comment [{ target/xfail selector } [{.|0|linenum}]]
|
||||
# indicate a bogus error message <regexp> use to occur here
|
||||
# (the test fails if it does occur)
|
||||
#
|
||||
# dg-build regexp comment [{ target/xfail selector }]
|
||||
# indicate the build use to fail for some reason
|
||||
# (errors covered here include bad assembler generated, tool crashes,
|
||||
# and link failures)
|
||||
# (the test fails if it does occur)
|
||||
#
|
||||
# dg-excess-errors comment [{ target/xfail selector }]
|
||||
# indicate excess errors are expected (any line)
|
||||
# (this should only be used sparingly and temporarily)
|
||||
#
|
||||
# dg-output regexp [{ target selector }]
|
||||
# indicate the expected output of the program is <regexp>
|
||||
# (there may be multiple occurrences of this, they are concatenated)
|
||||
#
|
||||
# dg-final { tcl code }
|
||||
# add some tcl code to be run at the end
|
||||
# (there may be multiple occurrences of this, they are concatenated)
|
||||
# (unbalanced braces must be \-escaped)
|
||||
#
|
||||
# "{ target selector }" is a list of expressions that determine whether the
|
||||
# test succeeds or fails for a particular target, or in some cases whether the
|
||||
# option applies for a particular target. If the case of `dg-do' it specifies
|
||||
# whether the test case is even attempted on the specified target.
|
||||
#
|
||||
# The target selector is always optional. The format is one of:
|
||||
#
|
||||
# { xfail *-*-* ... } - the test is expected to fail for the given targets
|
||||
# { target *-*-* ... } - the option only applies to the given targets
|
||||
#
|
||||
# At least one target must be specified, use *-*-* for "all targets".
|
||||
# At present it is not possible to specify both `xfail' and `target'.
|
||||
# "native" may be used in place of "*-*-*".
|
||||
|
||||
Example 1: Testing compilation only
|
||||
// { dg-do compile }
|
||||
</programlisting>
|
||||
|
||||
Example 2: Testing for expected warnings on line 36, which all targets fail
|
||||
Example 2: Testing for expected warnings on line 36, which all targets fail:
|
||||
<programlisting>
|
||||
// { dg-warning "string literals" "" { xfail *-*-* } 36 }
|
||||
</programlisting>
|
||||
|
||||
Example 3: Testing for expected warnings on line 36
|
||||
Example 3: Testing for expected warnings on line 36:
|
||||
<programlisting>
|
||||
// { dg-warning "string literals" "" { target *-*-* } 36 }
|
||||
</programlisting>
|
||||
|
||||
Example 4: Testing for compilation errors on line 41
|
||||
Example 4: Testing for compilation errors on line 41:
|
||||
<programlisting>
|
||||
// { dg-do compile }
|
||||
// { dg-error "no match for" "" { target *-*-* } 41 }
|
||||
</programlisting>
|
||||
|
||||
Example 5: Testing with special command line settings, or without the
|
||||
use of pre-compiled headers, in particular the stdc++.h.gch file. Any
|
||||
options here will override the DEFAULT_CXXFLAGS and PCH_CXXFLAGS set
|
||||
up in the normal.exp file.
|
||||
use of pre-compiled headers, in particular the
|
||||
<filename class="headerfile">stdc++.h.gch</filename> file. Any
|
||||
options here will override the <varname>DEFAULT_CXXFLAGS</varname> and
|
||||
<varname>PCH_CXXFLAGS</varname> set up in the <filename>normal.exp</filename>
|
||||
file:
|
||||
<programlisting>
|
||||
// { dg-options "-O0" { target *-*-* } }
|
||||
</programlisting>
|
||||
|
||||
Example 6: Compiling and linking a test only for C++14 and later, and only
|
||||
if Debug Mode is active:
|
||||
<programlisting>
|
||||
// { dg-do link { target c++14 } }
|
||||
// { dg-require-debug-mode "" }
|
||||
</programlisting>
|
||||
|
||||
Example 7: Running a test only on x86 targets, and only for C++11 and later,
|
||||
with specific options, and additional options for 32-bit x86:
|
||||
<programlisting>
|
||||
// { dg-options "-fstrict-enums" }
|
||||
// { dg-additional-options "-march=i486" { target ia32 } }
|
||||
// { dg-do run { target { ia32 || x86_64-*-* } } }
|
||||
// { dg-require-effective-target "c++11" }
|
||||
</programlisting>
|
||||
</para>
|
||||
|
||||
<para>
|
||||
More examples can be found in the
|
||||
<filename>libstdc++-v3/testsuite/*/*.cc</filename> files.
|
||||
</para>
|
||||
</section>
|
||||
|
||||
<section xml:id="tests.dg.directives"><info><title>Directives Specific to Libstdc++ Tests</title></info>
|
||||
|
||||
<para>
|
||||
In addition to the usual <link
|
||||
xmlns:xlink="http://www.w3.org/1999/xlink"
|
||||
xlink:href="https://gcc.gnu.org/onlinedocs/gccint/Require-support.html">Variants
|
||||
of <literal>dg-require-<replaceable>support</replaceable></literal></link>
|
||||
several more directives are available for use in libstdc++ tests,
|
||||
including the following:
|
||||
</para>
|
||||
|
||||
<variablelist>
|
||||
<varlistentry><term><literal>dg-require-namedlocale</literal> <replaceable>name</replaceable></term>
|
||||
<listitem><para>The named locale must be available.
|
||||
</para></listitem>
|
||||
</varlistentry>
|
||||
<varlistentry><term><literal>dg-require-debug-mode ""</literal></term>
|
||||
<listitem><para>Skip the test if the Debug Mode is not active
|
||||
(as determined by the <literal>_GLIBCXX_DEBUG</literal> macro).
|
||||
</para></listitem>
|
||||
</varlistentry>
|
||||
<varlistentry><term><literal>dg-require-parallel-mode ""</literal></term>
|
||||
<listitem><para>Skip the test if the Parallel Mode is not active
|
||||
(as determined by the <literal>_GLIBCXX_PARALLEL</literal> macro).
|
||||
</para></listitem>
|
||||
</varlistentry>
|
||||
<varlistentry><term><literal>dg-require-profile-mode ""</literal></term>
|
||||
<listitem><para>Skip the test if the Profile Mode is not active
|
||||
(as determined by the <literal>_GLIBCXX_PROFILE</literal> macro).
|
||||
</para></listitem>
|
||||
</varlistentry>
|
||||
<varlistentry><term><literal>dg-require-normal-mode ""</literal></term>
|
||||
<listitem><para>Skip the test if any of Debug, Parallel or Profile
|
||||
Mode is active.
|
||||
</para></listitem>
|
||||
</varlistentry>
|
||||
<varlistentry><term><literal>dg-require-atomic-builtins ""</literal></term>
|
||||
<listitem><para>Skip the test if atomic operations on <type>bool</type>
|
||||
and <type>int</type> are not lock-free.
|
||||
</para></listitem>
|
||||
</varlistentry>
|
||||
<varlistentry><term><literal>dg-require-gthreads ""</literal></term>
|
||||
<listitem><para>Skip the test if the C++11 thread library is not
|
||||
supported, as determined by the <literal>_GLIBCXX_HAS_GTHREADS</literal>
|
||||
macro.
|
||||
</para></listitem>
|
||||
</varlistentry>
|
||||
<varlistentry><term><literal>dg-require-gthreads-timed ""</literal></term>
|
||||
<listitem><para>Skip the test if C++11 timed mutexes are not supported,
|
||||
as determined by the <literal>_GLIBCXX_HAS_GTHREADS</literal> and
|
||||
<literal>_GTHREAD_USE_MUTEX_TIMEDLOCK</literal> macros.
|
||||
</para></listitem>
|
||||
</varlistentry>
|
||||
<varlistentry><term><literal>dg-require-string-conversions ""</literal></term>
|
||||
<listitem><para>Skip the test if the C++11 <function>to_string</function>
|
||||
and <function>stoi</function>, <function>stod</function> etc. functions
|
||||
are not fully supported (including wide character versions).
|
||||
</para></listitem>
|
||||
</varlistentry>
|
||||
<varlistentry><term><literal>dg-require-filesystem-ts ""</literal></term>
|
||||
<listitem><para>Skip the test if the Filesystem TS is not supported.
|
||||
</para></listitem>
|
||||
</varlistentry>
|
||||
</variablelist>
|
||||
</section>
|
||||
|
||||
</section>
|
||||
|
||||
|
||||
<section xml:id="test.harness" xreflabel="Test Harness and Utilities"><info><title>Test Harness and Utilities</title></info>
|
||||
|
||||
|
|
Loading…
Reference in New Issue