aboutsummaryrefslogtreecommitdiff
path: root/gold/testsuite/tls_test.cc
blob: 8864320af3875ca48dc0ff77c64a7d7786b4fb1b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
// tls_test.cc -- test TLS variables for gold

// Copyright (C) 2006-2015 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.

// This file is part of gold.

// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
// MA 02110-1301, USA.

// This provides a set of test functions for TLS variables.  The
// functions are called by a main function in tls_test_main.cc.  This
// lets us test TLS access from a shared library.  We currently don't
// bother to test TLS access between two different files, on the
// theory that that is no more complicated than ordinary variable
// access between files.

// We start two threads, and stop the second one.  Then we run the
// first thread through the following cases.  Then we let the second
// thread continue, and run it through the same set of cases.  All the
// actual thread manipulation is in tls_test_main.cc.

// 1  Access to an uninitialized global thread variable.
// 2  Access to an uninitialized static thread variable.
// 3  Access to an initialized global thread variable.
// 4  Access to an initialized static thread variable.
// 5  Taking the address of a global thread variable.
// 6  Taking the address of a static thread variable.
// 8  Like test 1, but with the thread variable defined in another file.
// 9  Like test 3, but with the thread variable defined in another file.
// 10 Like test 5, but with the thread variable defined in another file.
// last  Verify that the above tests left the variables set correctly.


#include "config.h"
#include <cstdio>
#include "tls_test.h"

#define CHECK_EQ_OR_RETURN(var, expected)				\
  do									\
    {									\
      if ((var) != (expected))						\
	{								\
	  printf(#var ": expected %d, found %d\n", expected, var);	\
	  return false;							\
	}								\
    }									\
  while (0)

__thread int v1;
static __thread int v2;

// We don't use these pointers, but putting them in tests alignment on
// a 64-bit target.
__thread char* p1;
char dummy;
__thread char* p2 = &dummy;

__thread int v3 = 3;
static __thread int v4 = 4;
__thread int v5;
static __thread int v6;

struct int128
{
  long long hi;
  long long lo;
};

static __thread struct int128 v12 = { 115, 125 };

bool
t1()
{
  CHECK_EQ_OR_RETURN(v1, 0);
  v1 = 10;
  return true;
}

bool
t2()
{
  CHECK_EQ_OR_RETURN(v2, 0);
  v2 = 20;
  return true;
}

bool
t3()
{
  CHECK_EQ_OR_RETURN(v3, 3);
  v3 = 30;
  return true;
}

bool
t4()
{
  CHECK_EQ_OR_RETURN(v4, 4);
  v4 = 40;
  return true;
}

// For test 5 the main function calls f5b(f5a()), then calls t5().

int*
f5a()
{
  return &v5;
}

void
f5b(int* p)
{
  *p = 50;
}

bool
t5()
{
  CHECK_EQ_OR_RETURN(v5, 50);
  return true;
}

// For test 6 the main function calls f6b(f6a()), then calls t6().

int*
f6a()
{
  return &v6;
}

void
f6b(int* p)
{
  *p = 60;
}

bool
t6()
{
  CHECK_EQ_OR_RETURN(v6, 60);
  return true;
}

// The slot for t7() is unused.

bool
t8()
{
  CHECK_EQ_OR_RETURN(o1, 0);
  o1 = -10;
  return true;
}

bool
t9()
{
  CHECK_EQ_OR_RETURN(o2, -2);
  o2 = -20;
  return true;
}

// For test 10 the main function calls f10b(f10a()), then calls t10().

int*
f10a()
{
  return &o3;
}

void
f10b(int* p)
{
  *p = -30;
}

bool
t10()
{
  CHECK_EQ_OR_RETURN(o3, -30);
  return true;
}

bool
t12()
{
  struct int128 newval = { 335, 345 };
  CHECK_EQ_OR_RETURN((int) v12.hi, 115);
  CHECK_EQ_OR_RETURN((int) v12.lo, 125);
  v12 = newval;
  return true;
}

bool
t_last()
{
  CHECK_EQ_OR_RETURN(v1, 10);
  CHECK_EQ_OR_RETURN(v2, 20);
  CHECK_EQ_OR_RETURN(v3, 30);
  CHECK_EQ_OR_RETURN(v4, 40);
  CHECK_EQ_OR_RETURN(v5, 50);
  CHECK_EQ_OR_RETURN(v6, 60);
  CHECK_EQ_OR_RETURN((int) v12.hi, 335);
  CHECK_EQ_OR_RETURN((int) v12.lo, 345);
  CHECK_EQ_OR_RETURN(o1, -10);
  CHECK_EQ_OR_RETURN(o2, -20);
  CHECK_EQ_OR_RETURN(o3, -30);
  int check = t11_last();
  CHECK_EQ_OR_RETURN(check, 1);
  return true;
}