gold/testsuite/tls_test.cc

   1 // tls_test.cc -- test TLS variables for gold
   2
   3 // Copyright 2006, 2007 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 "tls_test.h"
  49
  50 #define CHECK_EQ_OR_RETURN(var, expected)                               \
  51   do                                                                    \
  52     {                                                                   \
  53       if ((var) != (expected))                                          \
  54         {                                                               \
  55           printf(#var ": expected %d, found %d\n", expected, var);      \
  56           return false;                                                 \
  57         }                                                               \
  58     }                                                                   \
  59   while (0)
  60
  61 __thread int v1;
  62 static __thread int v2;
  63 __thread int v3 = 3;
  64 static __thread int v4 = 4;
  65 __thread int v5;
  66 static __thread int v6;
  67
  68 bool
  69 t1()
  70 {
  71   CHECK_EQ_OR_RETURN(v1, 0);
  72   v1 = 10;
  73   return true;
  74 }
  75
  76 bool
  77 t2()
  78 {
  79   CHECK_EQ_OR_RETURN(v2, 0);
  80   v2 = 20;
  81   return true;
  82 }
  83
  84 bool
  85 t3()
  86 {
  87   CHECK_EQ_OR_RETURN(v3, 3);
  88   v3 = 30;
  89   return true;
  90 }
  91
  92 bool
  93 t4()
  94 {
  95   CHECK_EQ_OR_RETURN(v4, 4);
  96   v4 = 40;
  97   return true;
  98 }
  99
 100 // For test 5 the main function calls f5b(f5a()), then calls t5().
 101
 102 int*
 103 f5a()
 104 {
 105   return &v5;
 106 }
 107
 108 void
 109 f5b(int* p)
 110 {
 111   *p = 50;
 112 }
 113
 114 bool
 115 t5()
 116 {
 117   CHECK_EQ_OR_RETURN(v5, 50);
 118   return true;
 119 }
 120
 121 // For test 6 the main function calls f6b(f6a()), then calls t6().
 122
 123 int*
 124 f6a()
 125 {
 126   return &v6;
 127 }
 128
 129 void
 130 f6b(int* p)
 131 {
 132   *p = 60;
 133 }
 134
 135 bool
 136 t6()
 137 {
 138   CHECK_EQ_OR_RETURN(v6, 60);
 139   return true;
 140 }
 141
 142 // The slot for t7() is unused.
 143
 144 bool
 145 t8()
 146 {
 147   CHECK_EQ_OR_RETURN(o1, 0);
 148   o1 = -10;
 149   return true;
 150 }
 151
 152 bool
 153 t9()
 154 {
 155   CHECK_EQ_OR_RETURN(o2, -2);
 156   o2 = -20;
 157   return true;
 158 }
 159
 160 // For test 10 the main function calls f10b(f10a()), then calls t10().
 161
 162 int*
 163 f10a()
 164 {
 165   return &o3;
 166 }
 167
 168 void
 169 f10b(int* p)
 170 {
 171   *p = -30;
 172 }
 173
 174 bool
 175 t10()
 176 {
 177   CHECK_EQ_OR_RETURN(o3, -30);
 178   return true;
 179 }
 180
 181 bool
 182 t_last()
 183 {
 184   CHECK_EQ_OR_RETURN(v1, 10);
 185   CHECK_EQ_OR_RETURN(v2, 20);
 186   CHECK_EQ_OR_RETURN(v3, 30);
 187   CHECK_EQ_OR_RETURN(v4, 40);
 188   CHECK_EQ_OR_RETURN(v5, 50);
 189   CHECK_EQ_OR_RETURN(v6, 60);
 190   CHECK_EQ_OR_RETURN(o1, -10);
 191   CHECK_EQ_OR_RETURN(o2, -20);
 192   CHECK_EQ_OR_RETURN(o3, -30);
 193   return true;
 194 }