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1/* Copyright (C) 2003-2019 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
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/* Check alignment, overlapping and layout of TLS variables. */
20#include <stdint.h>
21#include <stdio.h>
22#include <stdlib.h>
23#include <pthread.h>
24#include <pthreadP.h>
25#include <sys/param.h>
26
27#include "tst-tls5.h"
28
29#ifdef TLS_REGISTER
30
31struct tls_obj tls_registry[64];
32
33static int
34tls_addr_cmp (const void *a, const void *b)
35{
36 if (((struct tls_obj *)a)->addr < ((struct tls_obj *)b)->addr)
37 return -1;
38 if (((struct tls_obj *)a)->addr > ((struct tls_obj *)b)->addr)
39 return 1;
40 return 0;
41}
42
43static int
44do_test (void)
45{
46 size_t cnt, i;
47 int res = 0;
48 uintptr_t min_addr = ~(uintptr_t) 0, max_addr = 0;
49
50 for (cnt = 0; tls_registry[cnt].name; ++cnt);
51 tls_registry[cnt].name = NULL;
52 tls_registry[cnt].addr = (uintptr_t) pthread_self ();
53 tls_registry[cnt].size = sizeof (struct pthread);
54 tls_registry[cnt++].align = __alignof__ (struct pthread);
55
56 qsort (tls_registry, cnt, sizeof (struct tls_obj), tls_addr_cmp);
57
58 for (i = 0; i < cnt; ++i)
59 {
60 printf ("%s%s = %p, size %zd, align %zd",
61 tls_registry[i].name ? "&" : "",
62 tls_registry[i].name ?: "pthread_self ()",
63 (void *) tls_registry[i].addr,
64 tls_registry[i].size, tls_registry[i].align);
65 if (tls_registry[i].addr & (tls_registry[i].align - 1))
66 {
67 fputs (", WRONG ALIGNMENT", stdout);
68 res = 1;
69 }
70 if (i > 0
71 && (tls_registry[i - 1].addr + tls_registry[i - 1].size
72 > tls_registry[i].addr))
73 {
74 fputs (", ADDRESS OVERLAP", stdout);
75 res = 1;
76 }
77 puts ("");
78 if (tls_registry[i].name)
79 {
80 min_addr = MIN (tls_registry[i].addr, min_addr);
81 max_addr = MAX (tls_registry[i].addr + tls_registry[i].size,
82 max_addr);
83 }
84 }
85
86 if (cnt > 1)
87 {
88#if TLS_TCB_AT_TP
89 if (tls_registry[cnt - 1].name)
90 {
91 puts ("pthread_self () not larger than all TLS addresses");
92 res = 1;
93 }
94 else
95 max_addr = MAX (tls_registry[cnt - 1].addr, max_addr);
96#elif TLS_DTV_AT_TP
97 if (tls_registry[0].name)
98 {
99 puts ("pthread_self () not smaller than all TLS addresses");
100 res = 1;
101 }
102#else
103 abort ();
104#endif
105 printf ("Initial TLS used block size %zd\n",
106 (size_t) (max_addr - min_addr));
107 }
108 return res;
109}
110
111#define TEST_FUNCTION do_test ()
112
113#else
114
115#define TEST_FUNCTION 0
116
117#endif
118
119#include "../test-skeleton.c"
120

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