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1/* edtest.c -- Test for libbacktrace storage allocation stress handling
2 Copyright (C) 2017 Free Software Foundation, Inc.
3
4Redistribution and use in source and binary forms, with or without
5modification, are permitted provided that the following conditions are
6met:
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
20THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
22WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
23DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
24INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
25(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
26SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
28STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
29IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30POSSIBILITY OF SUCH DAMAGE. */
31
32#include "config.h"
33
34#include <assert.h>
35#include <stdio.h>
36#include <stdlib.h>
37#include <string.h>
38#include <sys/types.h>
39
40#include "backtrace.h"
41#include "backtrace-supported.h"
42#include "internal.h"
43
44#include "testlib.h"
45
46static int test1 (void) __attribute__ ((noinline, unused));
47static int test1 (void) __attribute__ ((noinline, unused));
48extern int f2 (int);
49extern int f3 (int, int);
50
51static int
52test1 (void)
53{
54 /* Returning a value here and elsewhere avoids a tailcall which
55 would mess up the backtrace. */
56 return f2 (__LINE__) + 1;
57}
58
59int
60f3 (int f1line, int f2line)
61{
62 struct info all[20];
63 struct bdata data;
64 int f3line;
65 int i;
66
67 data.all = &all[0];
68 data.index = 0;
69 data.max = 20;
70 data.failed = 0;
71
72 f3line = __LINE__ + 1;
73 i = backtrace_full (state, 0, callback_one, error_callback_one, &data);
74
75 if (i != 0)
76 {
77 fprintf (stderr, "test1: unexpected return value %d\n", i);
78 data.failed = 1;
79 }
80
81 if (data.index < 3)
82 {
83 fprintf (stderr,
84 "test1: not enough frames; got %zu, expected at least 3\n",
85 data.index);
86 data.failed = 1;
87 }
88
89 check ("test1", 0, all, f3line, "f3", "edtest.c", &data.failed);
90 check ("test1", 1, all, f2line, "f2", "edtest2_build.c", &data.failed);
91 check ("test1", 2, all, f1line, "test1", "edtest.c", &data.failed);
92
93 printf ("%s: backtrace_full alloc stress\n", data.failed ? "FAIL" : "PASS");
94
95 if (data.failed)
96 ++failures;
97
98 return failures;
99}
100
101int
102main (int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED)
103{
104 state = backtrace_create_state (argv[0], BACKTRACE_SUPPORTS_THREADS,
105 error_callback_create, NULL);
106
107 // Grab the storage allocation lock prior to doing anything interesting.
108 // The intent here is to insure that the backtrace_alloc code is forced
109 // to always call mmap() for new memory as opposed to reusing previously
110 // allocated memory from the free list. Doing things this way helps
111 // simulate what you might see in a multithreaded program in which there
112 // are racing calls to the allocator.
113 struct backtrace_state *state_internal =
114 (struct backtrace_state *) state;
115 state_internal->lock_alloc = 1;
116
117 // Kick off the test
118 test1();
119
120 exit (failures > 0 ? EXIT_FAILURE : EXIT_SUCCESS);
121}
122

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