gold/testsuite/tls_test.cc

   1 // tls_test.cc -- test TLS variables for gold
   2
   3 // Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
   4 // Written by Ian Lance Taylor <iant@google.com>.
   5
   6 // This file is part of gold.
   7
   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.
  12
  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.
  17
  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.
  22
  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.
  29
  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.
  34
  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.
  45
  46
  47 #include <cstdio>
  48 #include "config.h"
  49 #include "tls_test.h"
  50
  51 #define CHECK_EQ_OR_RETURN(var, expected)                               \
  52   do                                                                    \
  53     {                                                                   \
  54       if ((var) != (expected))                                          \
  55         {                                                               \
  56           printf(#var ": expected %d, found %d\n", expected, var);      \
  57           return false;                                                 \
  58         }                                                               \
  59     }                                                                   \
  60   while (0)
  61
  62 __thread int v1;
  63 static __thread int v2;
  64
  65 // We don't use these pointers, but putting them in tests alignment on
  66 // a 64-bit target.
  67 __thread char* p1;
  68 char dummy;
  69 __thread char* p2 = &dummy;
  70
  71 __thread int v3 = 3;
  72 static __thread int v4 = 4;
  73 __thread int v5;
  74 static __thread int v6;
  75
  76 bool
  77 t1()
  78 {
  79   CHECK_EQ_OR_RETURN(v1, 0);
  80   v1 = 10;
  81   return true;
  82 }
  83
  84 bool
  85 t2()
  86 {
  87   CHECK_EQ_OR_RETURN(v2, 0);
  88   v2 = 20;
  89   return true;
  90 }
  91
  92 bool
  93 t3()
  94 {
  95   CHECK_EQ_OR_RETURN(v3, 3);
  96   v3 = 30;
  97   return true;
  98 }
  99
 100 bool
 101 t4()
 102 {
 103   CHECK_EQ_OR_RETURN(v4, 4);
 104   v4 = 40;
 105   return true;
 106 }
 107
 108 // For test 5 the main function calls f5b(f5a()), then calls t5().
 109
 110 int*
 111 f5a()
 112 {
 113   return &v5;
 114 }
 115
 116 void
 117 f5b(int* p)
 118 {
 119   *p = 50;
 120 }
 121
 122 bool
 123 t5()
 124 {
 125   CHECK_EQ_OR_RETURN(v5, 50);
 126   return true;
 127 }
 128
 129 // For test 6 the main function calls f6b(f6a()), then calls t6().
 130
 131 int*
 132 f6a()
 133 {
 134   return &v6;
 135 }
 136
 137 void
 138 f6b(int* p)
 139 {
 140   *p = 60;
 141 }
 142
 143 bool
 144 t6()
 145 {
 146   CHECK_EQ_OR_RETURN(v6, 60);
 147   return true;
 148 }
 149
 150 // The slot for t7() is unused.
 151
 152 bool
 153 t8()
 154 {
 155   CHECK_EQ_OR_RETURN(o1, 0);
 156   o1 = -10;
 157   return true;
 158 }
 159
 160 bool
 161 t9()
 162 {
 163   CHECK_EQ_OR_RETURN(o2, -2);
 164   o2 = -20;
 165   return true;
 166 }
 167
 168 // For test 10 the main function calls f10b(f10a()), then calls t10().
 169
 170 int*
 171 f10a()
 172 {
 173   return &o3;
 174 }
 175
 176 void
 177 f10b(int* p)
 178 {
 179   *p = -30;
 180 }
 181
 182 bool
 183 t10()
 184 {
 185   CHECK_EQ_OR_RETURN(o3, -30);
 186   return true;
 187 }
 188
 189 bool
 190 t_last()
 191 {
 192   CHECK_EQ_OR_RETURN(v1, 10);
 193   CHECK_EQ_OR_RETURN(v2, 20);
 194   CHECK_EQ_OR_RETURN(v3, 30);
 195   CHECK_EQ_OR_RETURN(v4, 40);
 196   CHECK_EQ_OR_RETURN(v5, 50);
 197   CHECK_EQ_OR_RETURN(v6, 60);
 198   CHECK_EQ_OR_RETURN(o1, -10);
 199   CHECK_EQ_OR_RETURN(o2, -20);
 200   CHECK_EQ_OR_RETURN(o3, -30);
 201   int check = t11_last();
 202   CHECK_EQ_OR_RETURN(check, 1);
 203   return true;
 204 }