libbacktrace/allocfail.c

   1 /* allocfail.c -- Test for libbacktrace library
   2    Copyright (C) 2018-2021 Free Software Foundation, Inc.
   3
   4 Redistribution and use in source and binary forms, with or without
   5 modification, are permitted provided that the following conditions are
   6 met:
   7
   8     (1) Redistributions of source code must retain the above copyright
   9     notice, this list of conditions and the following disclaimer.
  10
  11     (2) Redistributions in binary form must reproduce the above copyright
  12     notice, this list of conditions and the following disclaimer in
  13     the documentation and/or other materials provided with the
  14     distribution.
  15
  16     (3) The name of the author may not be used to
  17     endorse or promote products derived from this software without
  18     specific prior written permission.
  19
  20 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  21 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  22 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  23 DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
  24 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  25 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  26 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  28 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  29 IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30 POSSIBILITY OF SUCH DAMAGE.  */
  31
  32 #include <assert.h>
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36 #include <unistd.h>
  37
  38 #include "filenames.h"
  39
  40 #include "backtrace.h"
  41 #include "backtrace-supported.h"
  42
  43 #include "testlib.h"
  44
  45 extern uint64_t get_nr_allocs (void);
  46 extern void set_fail_at_alloc (uint64_t);
  47 extern int at_fail_alloc_p (void);
  48
  49 static int test1 (void) __attribute__ ((noinline, unused));
  50 static int f2 (int) __attribute__ ((noinline));
  51 static int f3 (int, int) __attribute__ ((noinline));
  52
  53 static unsigned callback_errors = 0;
  54
  55 static void
  56 error_callback_full (void *vdata ATTRIBUTE_UNUSED,
  57                      const char *msg ATTRIBUTE_UNUSED,
  58                      int errnum ATTRIBUTE_UNUSED)
  59 {
  60   if (at_fail_alloc_p ())
  61     {
  62       set_fail_at_alloc (0);
  63       return;
  64     }
  65
  66   callback_errors++;
  67 }
  68
  69 static int
  70 callback_full (void *vdata ATTRIBUTE_UNUSED, uintptr_t pc ATTRIBUTE_UNUSED,
  71               const char *filename ATTRIBUTE_UNUSED,
  72               int lineno ATTRIBUTE_UNUSED,
  73               const char *function ATTRIBUTE_UNUSED)
  74 {
  75
  76   return 0;
  77 }
  78
  79 static int
  80 test1 (void)
  81 {
  82   return f2 (__LINE__) + 1;
  83 }
  84
  85 static int
  86 f2 (int f1line)
  87 {
  88   return f3 (f1line, __LINE__) + 2;
  89 }
  90
  91 static int
  92 f3 (int f1line ATTRIBUTE_UNUSED, int f2line ATTRIBUTE_UNUSED)
  93 {
  94   int i;
  95
  96   i = backtrace_full (state, 0, callback_full, error_callback_full, NULL);
  97
  98   if (i != 0)
  99     {
 100       fprintf (stderr, "test1: unexpected return value %d\n", i);
 101       ++failures;
 102     }
 103
 104   if (callback_errors)
 105       ++failures;
 106
 107   return failures;
 108 }
 109
 110 /* Run all the tests.  */
 111
 112 int
 113 main (int argc, char **argv)
 114 {
 115   uint64_t fail_at = 0;
 116
 117   if (argc == 2)
 118     {
 119       fail_at = atoi (argv[1]);
 120       set_fail_at_alloc (fail_at);
 121     }
 122
 123   state = backtrace_create_state (argv[0], BACKTRACE_SUPPORTS_THREADS,
 124                                   error_callback_full, NULL);
 125   if (state == NULL)
 126     exit (failures ? EXIT_FAILURE : EXIT_SUCCESS);
 127
 128 #if BACKTRACE_SUPPORTED
 129   test1 ();
 130 #endif
 131
 132   if (argc == 1)
 133     fprintf (stderr, "%llu\n", (long long unsigned) get_nr_allocs ());
 134
 135   exit (failures ? EXIT_FAILURE : EXIT_SUCCESS);
 136 }