1/* Copyright (C) 2003-2024 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18/* Check alignment, overlapping and layout of TLS variables. */
19#include <stdint.h>
20#include <stdio.h>
21#include <stdlib.h>
22#include <pthread.h>
23#include <pthreadP.h>
24#include <sys/param.h>
25
26#include "tst-tls5.h"
27
28#ifdef TLS_REGISTER
29
30struct tls_obj tls_registry[64];
31
32static int
33tls_addr_cmp (const void *a, const void *b)
34{
35 if (((struct tls_obj *)a)->addr < ((struct tls_obj *)b)->addr)
36 return -1;
37 if (((struct tls_obj *)a)->addr > ((struct tls_obj *)b)->addr)
38 return 1;
39 return 0;
40}
41
42static int
43do_test (void)
44{
45 size_t cnt, i;
46 int res = 0;
47 uintptr_t min_addr = ~(uintptr_t) 0, max_addr = 0;
48
49 for (cnt = 0; tls_registry[cnt].name; ++cnt);
50 tls_registry[cnt].name = NULL;
51 tls_registry[cnt].addr = (uintptr_t) pthread_self ();
52 tls_registry[cnt].size = sizeof (struct pthread);
53 tls_registry[cnt++].align = __alignof__ (struct pthread);
54
55 qsort (tls_registry, cnt, sizeof (struct tls_obj), tls_addr_cmp);
56
57 for (i = 0; i < cnt; ++i)
58 {
59 printf (format: "%s%s = %p, size %zd, align %zd",
60 tls_registry[i].name ? "&" : "",
61 tls_registry[i].name ?: "pthread_self ()",
62 (void *) tls_registry[i].addr,
63 tls_registry[i].size, tls_registry[i].align);
64 if (tls_registry[i].addr & (tls_registry[i].align - 1))
65 {
66 fputs (", WRONG ALIGNMENT", stdout);
67 res = 1;
68 }
69 if (i > 0
70 && (tls_registry[i - 1].addr + tls_registry[i - 1].size
71 > tls_registry[i].addr))
72 {
73 fputs (", ADDRESS OVERLAP", stdout);
74 res = 1;
75 }
76 puts (s: "");
77 if (tls_registry[i].name)
78 {
79 min_addr = MIN (tls_registry[i].addr, min_addr);
80 max_addr = MAX (tls_registry[i].addr + tls_registry[i].size,
81 max_addr);
82 }
83 }
84
85 if (cnt > 1)
86 {
87#if TLS_TCB_AT_TP
88 if (tls_registry[cnt - 1].name)
89 {
90 puts (s: "pthread_self () not larger than all TLS addresses");
91 res = 1;
92 }
93 else
94 max_addr = MAX (tls_registry[cnt - 1].addr, max_addr);
95#elif TLS_DTV_AT_TP
96 if (tls_registry[0].name)
97 {
98 puts ("pthread_self () not smaller than all TLS addresses");
99 res = 1;
100 }
101#else
102 abort ();
103#endif
104 printf (format: "Initial TLS used block size %zd\n",
105 (size_t) (max_addr - min_addr));
106 }
107 return res;
108}
109
110#define TEST_FUNCTION do_test ()
111
112#else
113
114#define TEST_FUNCTION 0
115
116#endif
117
118#include "../test-skeleton.c"
119

source code of glibc/nptl/tst-tls5.c