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1 /* edtest.c -- Test for libbacktrace storage allocation stress handling
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2 Copyright (C) 2017-2018 Free Software Foundation, Inc.
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111
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3
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4 Redistribution and use in source and binary forms, with or without
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5 modification, are permitted provided that the following conditions are
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6 met:
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7
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8 (1) Redistributions of source code must retain the above copyright
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9 notice, this list of conditions and the following disclaimer.
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10
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11 (2) Redistributions in binary form must reproduce the above copyright
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12 notice, this list of conditions and the following disclaimer in
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13 the documentation and/or other materials provided with the
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14 distribution.
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15
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16 (3) The name of the author may not be used to
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17 endorse or promote products derived from this software without
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18 specific prior written permission.
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19
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20 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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21 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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22 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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23 DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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24 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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25 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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26 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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27 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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28 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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29 IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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30 POSSIBILITY OF SUCH DAMAGE. */
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31
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32 #include "config.h"
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33
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34 #include <assert.h>
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35 #include <stdio.h>
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36 #include <stdlib.h>
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37 #include <string.h>
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38 #include <sys/types.h>
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39
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40 #include "backtrace.h"
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41 #include "backtrace-supported.h"
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42 #include "internal.h"
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43
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44 #include "testlib.h"
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45
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46 static int test1 (void) __attribute__ ((noinline, unused));
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47 static int test1 (void) __attribute__ ((noinline, unused));
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48 extern int f2 (int);
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49 extern int f3 (int, int);
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50
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51 static int
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52 test1 (void)
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53 {
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54 /* Returning a value here and elsewhere avoids a tailcall which
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55 would mess up the backtrace. */
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56 return f2 (__LINE__) + 1;
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57 }
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58
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59 int
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60 f3 (int f1line, int f2line)
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61 {
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62 struct info all[20];
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63 struct bdata data;
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64 int f3line;
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65 int i;
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66
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67 data.all = &all[0];
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68 data.index = 0;
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69 data.max = 20;
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70 data.failed = 0;
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71
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72 f3line = __LINE__ + 1;
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73 i = backtrace_full (state, 0, callback_one, error_callback_one, &data);
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74
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75 if (i != 0)
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76 {
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77 fprintf (stderr, "test1: unexpected return value %d\n", i);
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78 data.failed = 1;
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79 }
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80
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81 if (data.index < 3)
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82 {
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83 fprintf (stderr,
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84 "test1: not enough frames; got %zu, expected at least 3\n",
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85 data.index);
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86 data.failed = 1;
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87 }
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88
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89 check ("test1", 0, all, f3line, "f3", "edtest.c", &data.failed);
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90 check ("test1", 1, all, f2line, "f2", "edtest2_build.c", &data.failed);
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91 check ("test1", 2, all, f1line, "test1", "edtest.c", &data.failed);
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92
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93 printf ("%s: backtrace_full alloc stress\n", data.failed ? "FAIL" : "PASS");
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94
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95 if (data.failed)
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96 ++failures;
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97
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98 return failures;
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99 }
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100
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101 int
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102 main (int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED)
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103 {
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104 state = backtrace_create_state (argv[0], BACKTRACE_SUPPORTS_THREADS,
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105 error_callback_create, NULL);
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106
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107 // Grab the storage allocation lock prior to doing anything interesting.
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108 // The intent here is to insure that the backtrace_alloc code is forced
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109 // to always call mmap() for new memory as opposed to reusing previously
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110 // allocated memory from the free list. Doing things this way helps
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111 // simulate what you might see in a multithreaded program in which there
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112 // are racing calls to the allocator.
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113 struct backtrace_state *state_internal =
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114 (struct backtrace_state *) state;
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115 state_internal->lock_alloc = 1;
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116
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117 // Kick off the test
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118 test1();
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119
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120 exit (failures > 0 ? EXIT_FAILURE : EXIT_SUCCESS);
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121 }
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