gcc/testsuite/gcc.dg/attr-weakref-1.c

   1 // { dg-do run }
   2 // { dg-require-weak "" }
   3 // On darwin, we use attr-weakref-1-darwin.c.
   4 // This test requires support for undefined weak symbols.  This support
   5 // is not available on hppa*-*-hpux*.  The test is skipped rather than
   6 // xfailed to suppress the warning that would otherwise arise.
   7 // { dg-skip-if "" { "*-*-darwin*" "hppa*-*-hpux*" "*-*-aix*" } "*" { "" } }
   8 // For kernel modules and static RTPs, the loader treats undefined weak
   9 // symbols in the same way as undefined strong symbols.  The test
  10 // therefore fails to load, so skip it.
  11 // { dg-skip-if "" { "*-*-vxworks*" && nonpic } "*" { "-non-static" } }
  12 // { dg-options "-O2" }
  13 // { dg-additional-sources "attr-weakref-1a.c" }
  14
  15 // Copyright 2005 Free Software Foundation, Inc.
  16 // Contributed by Alexandre Oliva <aoliva@redhat.com>
  17
  18 // Torture test for weakrefs.  The first letter of an identifier
  19 // indicates whether/how it is defined; the second letter indicates
  20 // whether it is part of a variable or function test; the number that
  21 // follows is a test counter, and a letter that may follow enables
  22 // multiple identifiers within the same test (e.g., multiple weakrefs
  23 // or pointers to the same identifier).
  24
  25 // Identifiers starting with W are weakrefs; those with p are
  26 // pointers; those with g are global definitions; those with l are
  27 // local definitions; those with w are expected to be weak undefined
  28 // in the symbol table; those with u are expected to be marked as
  29 // non-weak undefined in the symbol table.
  30
  31 #include <stdlib.h>
  32
  33 #define USED __attribute__((used))
  34
  35 typedef int vtype;
  36
  37 extern vtype wv1;
  38 static vtype Wv1a __attribute__((weakref ("wv1")));
  39 static vtype *pv1a USED = &Wv1a;
  40
  41 vtype gv2;
  42 static vtype Wv2a __attribute__((weakref ("gv2")));
  43 static vtype *pv2a USED = &Wv2a;
  44
  45 static vtype lv3;
  46 static vtype Wv3a __attribute__((weakref ("lv3")));
  47 static vtype *pv3a USED = &Wv3a;
  48
  49 extern vtype uv4;
  50 static vtype Wv4a __attribute__((weakref ("uv4")));
  51 static vtype *pv4a USED = &Wv4a;
  52 static vtype *pv4 USED = &uv4;
  53
  54 static vtype Wv5a __attribute__((weakref ("uv5")));
  55 static vtype *pv5a USED = &Wv5a;
  56 extern vtype uv5;
  57 static vtype *pv5 USED = &uv5;
  58
  59 static vtype Wv6a __attribute__((weakref ("wv6")));
  60 static vtype *pv6a USED = &Wv6a;
  61 extern vtype wv6;
  62
  63 static vtype Wv7a __attribute__((weakref ("uv7")));
  64 static vtype* USED fv7 (void) {
  65   return &Wv7a;
  66 }
  67 extern vtype uv7;
  68 static vtype* USED fv7a (void) {
  69   return &uv7;
  70 }
  71
  72 extern vtype uv8;
  73 static vtype* USED fv8a (void) {
  74   return &uv8;
  75 }
  76 static vtype Wv8a __attribute__((weakref ("uv8")));
  77 static vtype* USED fv8 (void) {
  78   return &Wv8a;
  79 }
  80
  81 extern vtype wv9 __attribute__((weak));
  82 static vtype Wv9a __attribute__((weakref ("wv9")));
  83 static vtype *pv9a USED = &Wv9a;
  84
  85 static vtype Wv10a __attribute__((weakref ("Wv10b")));
  86 static vtype Wv10b __attribute__((weakref ("Wv10c")));
  87 static vtype Wv10c __attribute__((weakref ("Wv10d")));
  88 static vtype Wv10d __attribute__((weakref ("wv10")));
  89 extern vtype wv10;
  90
  91 extern vtype wv11;
  92 static vtype Wv11d __attribute__((weakref ("wv11")));
  93 static vtype Wv11c __attribute__((weakref ("Wv11d")));
  94 static vtype Wv11b __attribute__((weakref ("Wv11c")));
  95 static vtype Wv11a __attribute__((weakref ("Wv11b")));
  96
  97 static vtype Wv12 __attribute__((weakref ("wv12")));
  98 extern vtype wv12 __attribute__((weak));
  99
 100 static vtype Wv13 __attribute__((weakref ("wv13")));
 101 extern vtype wv13 __attribute__((weak));
 102
 103 static vtype Wv14a __attribute__((weakref ("wv14")));
 104 static vtype Wv14b __attribute__((weakref ("wv14")));
 105 extern vtype wv14 __attribute__((weak));
 106
 107 typedef void ftype(void);
 108
 109 extern ftype wf1;
 110 static ftype Wf1a __attribute__((weakref ("wf1")));
 111 static ftype *pf1a USED = &Wf1a;
 112 static ftype Wf1c __attribute__((weakref));
 113 extern ftype Wf1c __attribute__((alias ("wf1")));
 114 static ftype *pf1c USED = &Wf1c;
 115
 116 void gf2(void) {}
 117 static ftype Wf2a __attribute__((weakref ("gf2")));
 118 static ftype *pf2a USED = &Wf2a;
 119
 120 static void lf3(void) {}
 121 static ftype Wf3a __attribute__((weakref ("lf3")));
 122 static ftype *pf3a USED = &Wf3a;
 123
 124 extern ftype uf4;
 125 static ftype Wf4a __attribute__((weakref ("uf4")));
 126 static ftype *pf4a USED = &Wf4a;
 127 static ftype *pf4 USED = &uf4;
 128
 129 static ftype Wf5a __attribute__((weakref ("uf5")));
 130 static ftype *pf5a USED = &Wf5a;
 131 extern ftype uf5;
 132 static ftype *pf5 USED = &uf5;
 133
 134 static ftype Wf6a __attribute__((weakref ("wf6")));
 135 static ftype *pf6a USED = &Wf6a;
 136 extern ftype wf6;
 137
 138 static ftype Wf7a __attribute__((weakref ("uf7")));
 139 static ftype* USED ff7 (void) {
 140   return &Wf7a;
 141 }
 142 extern ftype uf7;
 143 static ftype* USED ff7a (void) {
 144   return &uf7;
 145 }
 146
 147 extern ftype uf8;
 148 static ftype* USED ff8a (void) {
 149   return &uf8;
 150 }
 151 static ftype Wf8a __attribute__((weakref ("uf8")));
 152 static ftype* USED ff8 (void) {
 153   return &Wf8a;
 154 }
 155
 156 extern ftype wf9 __attribute__((weak));
 157 static ftype Wf9a __attribute__((weakref ("wf9")));
 158 static ftype *pf9a USED = &Wf9a;
 159
 160 static ftype Wf10a __attribute__((weakref ("Wf10b")));
 161 static ftype Wf10b __attribute__((weakref ("Wf10c")));
 162 static ftype Wf10c __attribute__((weakref ("Wf10d")));
 163 static ftype Wf10d __attribute__((weakref ("wf10")));
 164 extern ftype wf10;
 165
 166 extern ftype wf11;
 167 static ftype Wf11d __attribute__((weakref ("wf11")));
 168 static ftype Wf11c __attribute__((weakref ("Wf11d")));
 169 static ftype Wf11b __attribute__((weakref ("Wf11c")));
 170 static ftype Wf11a __attribute__((weakref ("Wf11b")));
 171
 172 static ftype Wf12 __attribute__((weakref ("wf12")));
 173 extern ftype wf12 __attribute__((weak));
 174
 175 static ftype Wf13 __attribute__((weakref ("wf13")));
 176 extern ftype wf13 __attribute__((weak));
 177
 178 static ftype Wf14a __attribute__((weakref ("wf14")));
 179 static ftype Wf14b __attribute__((weakref ("wf14")));
 180 extern ftype wf14 __attribute__((weak));
 181
 182 #ifndef __APPLE__
 183 #define chk(p) do { if (!p) abort (); } while (0)
 184 #else
 185 #define chk(p) /* */
 186 #endif
 187
 188 int main () {
 189   chk (!pv1a);
 190   chk (pv2a);
 191   chk (pv3a);
 192   chk (pv4a);
 193   chk (pv4);
 194   chk (pv5a);
 195   chk (pv5);
 196   chk (!pv6a);
 197   chk (fv7 ());
 198   chk (fv7a ());
 199   chk (fv8 ());
 200   chk (fv8a ());
 201   chk (!pv9a);
 202   chk (!&Wv10a);
 203   chk (!&Wv11a);
 204   chk (!&Wv12);
 205   chk (!&wv12);
 206   chk (!&wv13);
 207   chk (!&Wv14a);
 208
 209   chk (!pf1a);
 210   chk (!pf1c);
 211   chk (pf2a);
 212   chk (pf3a);
 213   chk (pf4a);
 214   chk (pf4);
 215   chk (pf5a);
 216   chk (pf5);
 217   chk (!pf6a);
 218   chk (ff7 ());
 219   chk (ff7a ());
 220   chk (ff8 ());
 221   chk (ff8a ());
 222   chk (!pf9a);
 223   chk (!&Wf10a);
 224   chk (!&Wf11a);
 225   chk (!&Wf12);
 226   chk (!&wf12);
 227   chk (!&wf13);
 228   chk (!&Wf14a);
 229
 230   exit (0);
 231 }