1 // tls_test.cc -- test TLS variables for gold
3 // Copyright (C) 2006-2018 Free Software Foundation, Inc.
4 // Written by Ian Lance Taylor <iant@google.com>.
6 // This file is part of gold.
8 // This program is free software; you can redistribute it and/or modify
9 // it under the terms of the GNU General Public License as published by
10 // the Free Software Foundation; either version 3 of the License, or
11 // (at your option) any later version.
13 // This program is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the Free Software
20 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 // MA 02110-1301, USA.
23 // This provides a set of test functions for TLS variables. The
24 // functions are called by a main function in tls_test_main.cc. This
25 // lets us test TLS access from a shared library. We currently don't
26 // bother to test TLS access between two different files, on the
27 // theory that that is no more complicated than ordinary variable
28 // access between files.
30 // We start two threads, and stop the second one. Then we run the
31 // first thread through the following cases. Then we let the second
32 // thread continue, and run it through the same set of cases. All the
33 // actual thread manipulation is in tls_test_main.cc.
35 // 1 Access to an uninitialized global thread variable.
36 // 2 Access to an uninitialized static thread variable.
37 // 3 Access to an initialized global thread variable.
38 // 4 Access to an initialized static thread variable.
39 // 5 Taking the address of a global thread variable.
40 // 6 Taking the address of a static thread variable.
41 // 8 Like test 1, but with the thread variable defined in another file.
42 // 9 Like test 3, but with the thread variable defined in another file.
43 // 10 Like test 5, but with the thread variable defined in another file.
44 // last Verify that the above tests left the variables set correctly.
51 #define CHECK_EQ_OR_RETURN(var, expected) \
54 if ((var) != (expected)) \
56 printf(#var ": expected %d, found %d\n", expected, var); \
63 static __thread
int v2
;
65 // We don't use these pointers, but putting them in tests alignment on
69 __thread
char* p2
= &dummy
;
72 static __thread
int v4
= 4;
74 static __thread
int v6
;
82 static __thread
struct int128 v12
= { 115, 125 };
87 CHECK_EQ_OR_RETURN(v1
, 0);
95 CHECK_EQ_OR_RETURN(v2
, 0);
103 CHECK_EQ_OR_RETURN(v3
, 3);
111 CHECK_EQ_OR_RETURN(v4
, 4);
116 // For test 5 the main function calls f5b(f5a()), then calls t5().
133 CHECK_EQ_OR_RETURN(v5
, 50);
137 // For test 6 the main function calls f6b(f6a()), then calls t6().
154 CHECK_EQ_OR_RETURN(v6
, 60);
158 // The slot for t7() is unused.
163 CHECK_EQ_OR_RETURN(o1
, 0);
171 CHECK_EQ_OR_RETURN(o2
, -2);
176 // For test 10 the main function calls f10b(f10a()), then calls t10().
193 CHECK_EQ_OR_RETURN(o3
, -30);
200 struct int128 newval
= { 335, 345 };
201 CHECK_EQ_OR_RETURN((int) v12
.hi
, 115);
202 CHECK_EQ_OR_RETURN((int) v12
.lo
, 125);
210 CHECK_EQ_OR_RETURN(v1
, 10);
211 CHECK_EQ_OR_RETURN(v2
, 20);
212 CHECK_EQ_OR_RETURN(v3
, 30);
213 CHECK_EQ_OR_RETURN(v4
, 40);
214 CHECK_EQ_OR_RETURN(v5
, 50);
215 CHECK_EQ_OR_RETURN(v6
, 60);
216 CHECK_EQ_OR_RETURN((int) v12
.hi
, 335);
217 CHECK_EQ_OR_RETURN((int) v12
.lo
, 345);
218 CHECK_EQ_OR_RETURN(o1
, -10);
219 CHECK_EQ_OR_RETURN(o2
, -20);
220 CHECK_EQ_OR_RETURN(o3
, -30);
221 int check
= t11_last();
222 CHECK_EQ_OR_RETURN(check
, 1);
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