support/test-driver.c

   1 /* Main function for test programs.
   2    Copyright (C) 2016-2018 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 /* This file should be included from test cases.  It will define a
  20    main function which provides the test wrapper.
  21
  22    It assumes that the test case defines a function
  23
  24      int do_test (void);
  25
  26    and arranges for that function being called under the test wrapper.
  27    The do_test function should return 0 to indicate a passing test, 1
  28    to indicate a failing test, or 77 to indicate an unsupported test.
  29    Other result values could be used to indicate a failing test, but
  30    the result of the expression is passed to exit and exit only
  31    returns the lower 8 bits of its input.  A non-zero return with some
  32    values could cause a test to incorrectly be considered passing when
  33    it really failed.  For this reason, the function should always
  34    return 0 (EXIT_SUCCESS), 1 (EXIT_FAILURE), or 77
  35    (EXIT_UNSUPPORTED).
  36
  37    The test function may print out diagnostic or warning messages as well
  38    as messages about failures.  These messages should be printed to stdout
  39    and not stderr so that the output is properly ordered with respect to
  40    the rest of the glibc testsuite run output.
  41
  42    Several preprocessors macros can be defined before including this
  43    file.
  44
  45    The name of the do_test function can be changed with the
  46    TEST_FUNCTION macro.  It must expand to the desired function name.
  47
  48    If the test case needs access to command line parameters, it must
  49    define the TEST_FUNCTION_ARGV macro with the name of the test
  50    function.  It must have the following type:
  51
  52      int TEST_FUNCTION_ARGV (int argc, char **argv);
  53
  54    This overrides the do_test default function and is incompatible
  55    with the TEST_FUNCTION macro.
  56
  57    If PREPARE is defined, it must expand to the name of a function of
  58    the type
  59
  60      void PREPARE (int argc, char **);
  61
  62    This function will be called early, after parsing the command line,
  63    but before running the test, in the parent process which acts as
  64    the test supervisor.
  65
  66    If CLEANUP_HANDLER is defined, it must expand to the name of a
  67    function of the type
  68
  69      void CLEANUP_HANDLER (void);
  70
  71    This function will be called from the timeout (SIGALRM) signal
  72    handler.
  73
  74    If EXPECTED_SIGNAL is defined, it must expanded to a constant which
  75    denotes the expected signal number.
  76
  77    If EXPECTED_STATUS is defined, it must expand to the expected exit
  78    status.
  79
  80    If TIMEOUT is defined, it must be positive constant.  It overrides
  81    the default test timeout and is measured in seconds.
  82
  83    If TEST_NO_MALLOPT is defined, the test wrapper will not call
  84    mallopt.
  85
  86    Custom command line handling can be implemented by defining the
  87    CMDLINE_OPTION macro (after including the <getopt.h> header; this
  88    requires _GNU_SOURCE to be defined).  This macro must expand to a
  89    to a comma-separated list of braced initializers for struct option
  90    from <getopt.h>, with a trailing comma.  CMDLINE_PROCESS can be
  91    defined as the name of a function which is called to process these
  92    options.  The function is passed the option character/number and
  93    has this type:
  94
  95      void CMDLINE_PROCESS (int);
  96
  97    If the program also to process custom default short command line
  98    argument (similar to getopt) it must define CMDLINE_OPTSTRING
  99    with the expected options (for instance "vb").
 100 */
 101
 102 #include <support/test-driver.h>
 103
 104 #include <string.h>
 105
 106 int
 107 main (int argc, char **argv)
 108 {
 109   struct test_config test_config;
 110   memset (&test_config, 0, sizeof (test_config));
 111
 112 #ifdef PREPARE
 113   test_config.prepare_function = (PREPARE);
 114 #endif
 115
 116 #if defined (TEST_FUNCTION) && defined (TEST_FUNCTON_ARGV)
 117 # error TEST_FUNCTION and TEST_FUNCTION_ARGV cannot be defined at the same time
 118 #endif
 119 #if defined (TEST_FUNCTION)
 120   test_config.test_function = TEST_FUNCTION;
 121 #elif defined (TEST_FUNCTION_ARGV)
 122   test_config.test_function_argv = TEST_FUNCTION_ARGV;
 123 #else
 124   test_config.test_function = do_test;
 125 #endif
 126
 127 #ifdef CLEANUP_HANDLER
 128   test_config.cleanup_function = CLEANUP_HANDLER;
 129 #endif
 130
 131 #ifdef EXPECTED_SIGNAL
 132   test_config.expected_signal = (EXPECTED_SIGNAL);
 133 #endif
 134
 135 #ifdef EXPECTED_STATUS
 136   test_config.expected_status = (EXPECTED_STATUS);
 137 #endif
 138
 139 #ifdef TEST_NO_MALLOPT
 140   test_config.no_mallopt = 1;
 141 #endif
 142
 143 #ifdef TIMEOUT
 144   test_config.timeout = TIMEOUT;
 145 #endif
 146
 147 #ifdef CMDLINE_OPTIONS
 148   struct option options[] =
 149     {
 150       CMDLINE_OPTIONS
 151       TEST_DEFAULT_OPTIONS
 152     };
 153   test_config.options = &options;
 154 #endif
 155 #ifdef CMDLINE_PROCESS
 156   test_config.cmdline_function = CMDLINE_PROCESS;
 157 #endif
 158 #ifdef CMDLINE_OPTSTRING
 159   test_config.optstring = "+" CMDLINE_OPTSTRING;
 160 #else
 161   test_config.optstring = "+";
 162 #endif
 163
 164   return support_test_main (argc, argv, &test_config);
 165 }