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 alpha*-dec-osf* and hppa*-*-hpux*.  The test is
   6 // skipped rather than xfailed to suppress the warning that would otherwise
   7 // arise.
   8 // { dg-skip-if "" { "alpha*-dec-osf*" "*-*-darwin*" "hppa*-*-hpux*" } "*" { "" } }
   9 // For kernel modules and static RTPs, the loader treats undefined weak
  10 // symbols in the same way as undefined strong symbols.  The test
  11 // therefore fails to load, so skip it.
  12 // { dg-skip-if "" { "*-*-vxworks*" && nonpic } "*" { "-non-static" } }
  13 // { dg-options "-O2" }
  14 // { dg-additional-sources "attr-weakref-1a.c" }
  15
  16 // Copyright 2005 Free Software Foundation, Inc.
  17 // Contributed by Alexandre Oliva <aoliva@redhat.com>
  18
  19 // Torture test for weakrefs.  The first letter of an identifier
  20 // indicates whether/how it is defined; the second letter indicates
  21 // whether it is part of a variable or function test; the number that
  22 // follows is a test counter, and a letter that may follow enables
  23 // multiple identifiers within the same test (e.g., multiple weakrefs
  24 // or pointers to the same identifier).
  25
  26 // Identifiers starting with W are weakrefs; those with p are
  27 // pointers; those with g are global definitions; those with l are
  28 // local definitions; those with w are expected to be weak undefined
  29 // in the symbol table; those with u are expected to be marked as
  30 // non-weak undefined in the symbol table.
  31
  32 #include <stdlib.h>
  33
  34 #define USED __attribute__((used))
  35
  36 typedef int vtype;
  37
  38 extern vtype wv1;
  39 static vtype Wv1a __attribute__((weakref ("wv1")));
  40 static vtype *pv1a USED = &Wv1a;
  41
  42 vtype gv2;
  43 static vtype Wv2a __attribute__((weakref ("gv2")));
  44 static vtype *pv2a USED = &Wv2a;
  45
  46 static vtype lv3;
  47 static vtype Wv3a __attribute__((weakref ("lv3")));
  48 static vtype *pv3a USED = &Wv3a;
  49
  50 extern vtype uv4;
  51 static vtype Wv4a __attribute__((weakref ("uv4")));
  52 static vtype *pv4a USED = &Wv4a;
  53 static vtype *pv4 USED = &uv4;
  54
  55 static vtype Wv5a __attribute__((weakref ("uv5")));
  56 static vtype *pv5a USED = &Wv5a;
  57 extern vtype uv5;
  58 static vtype *pv5 USED = &uv5;
  59
  60 static vtype Wv6a __attribute__((weakref ("wv6")));
  61 static vtype *pv6a USED = &Wv6a;
  62 extern vtype wv6;
  63
  64 static vtype Wv7a __attribute__((weakref ("uv7")));
  65 static vtype* USED fv7 (void) {
  66   return &Wv7a;
  67 }
  68 extern vtype uv7;
  69 static vtype* USED fv7a (void) {
  70   return &uv7;
  71 }
  72
  73 extern vtype uv8;
  74 static vtype* USED fv8a (void) {
  75   return &uv8;
  76 }
  77 static vtype Wv8a __attribute__((weakref ("uv8")));
  78 static vtype* USED fv8 (void) {
  79   return &Wv8a;
  80 }
  81
  82 extern vtype wv9 __attribute__((weak));
  83 static vtype Wv9a __attribute__((weakref ("wv9")));
  84 static vtype *pv9a USED = &Wv9a;
  85
  86 static vtype Wv10a __attribute__((weakref ("Wv10b")));
  87 static vtype Wv10b __attribute__((weakref ("Wv10c")));
  88 static vtype Wv10c __attribute__((weakref ("Wv10d")));
  89 static vtype Wv10d __attribute__((weakref ("wv10")));
  90 extern vtype wv10;
  91
  92 extern vtype wv11;
  93 static vtype Wv11d __attribute__((weakref ("wv11")));
  94 static vtype Wv11c __attribute__((weakref ("Wv11d")));
  95 static vtype Wv11b __attribute__((weakref ("Wv11c")));
  96 static vtype Wv11a __attribute__((weakref ("Wv11b")));
  97
  98 static vtype Wv12 __attribute__((weakref ("wv12")));
  99 extern vtype wv12 __attribute__((weak));
 100
 101 static vtype Wv13 __attribute__((weakref ("wv13")));
 102 extern vtype wv13 __attribute__((weak));
 103
 104 static vtype Wv14a __attribute__((weakref ("wv14")));
 105 static vtype Wv14b __attribute__((weakref ("wv14")));
 106 extern vtype wv14 __attribute__((weak));
 107
 108 typedef void ftype(void);
 109
 110 extern ftype wf1;
 111 static ftype Wf1a __attribute__((weakref ("wf1")));
 112 static ftype *pf1a USED = &Wf1a;
 113 static ftype Wf1c __attribute__((weakref));
 114 extern ftype Wf1c __attribute__((alias ("wf1")));
 115 static ftype *pf1c USED = &Wf1c;
 116
 117 void gf2(void) {}
 118 static ftype Wf2a __attribute__((weakref ("gf2")));
 119 static ftype *pf2a USED = &Wf2a;
 120
 121 static void lf3(void) {}
 122 static ftype Wf3a __attribute__((weakref ("lf3")));
 123 static ftype *pf3a USED = &Wf3a;
 124
 125 extern ftype uf4;
 126 static ftype Wf4a __attribute__((weakref ("uf4")));
 127 static ftype *pf4a USED = &Wf4a;
 128 static ftype *pf4 USED = &uf4;
 129
 130 static ftype Wf5a __attribute__((weakref ("uf5")));
 131 static ftype *pf5a USED = &Wf5a;
 132 extern ftype uf5;
 133 static ftype *pf5 USED = &uf5;
 134
 135 static ftype Wf6a __attribute__((weakref ("wf6")));
 136 static ftype *pf6a USED = &Wf6a;
 137 extern ftype wf6;
 138
 139 static ftype Wf7a __attribute__((weakref ("uf7")));
 140 static ftype* USED ff7 (void) {
 141   return &Wf7a;
 142 }
 143 extern ftype uf7;
 144 static ftype* USED ff7a (void) {
 145   return &uf7;
 146 }
 147
 148 extern ftype uf8;
 149 static ftype* USED ff8a (void) {
 150   return &uf8;
 151 }
 152 static ftype Wf8a __attribute__((weakref ("uf8")));
 153 static ftype* USED ff8 (void) {
 154   return &Wf8a;
 155 }
 156
 157 extern ftype wf9 __attribute__((weak));
 158 static ftype Wf9a __attribute__((weakref ("wf9")));
 159 static ftype *pf9a USED = &Wf9a;
 160
 161 static ftype Wf10a __attribute__((weakref ("Wf10b")));
 162 static ftype Wf10b __attribute__((weakref ("Wf10c")));
 163 static ftype Wf10c __attribute__((weakref ("Wf10d")));
 164 static ftype Wf10d __attribute__((weakref ("wf10")));
 165 extern ftype wf10;
 166
 167 extern ftype wf11;
 168 static ftype Wf11d __attribute__((weakref ("wf11")));
 169 static ftype Wf11c __attribute__((weakref ("Wf11d")));
 170 static ftype Wf11b __attribute__((weakref ("Wf11c")));
 171 static ftype Wf11a __attribute__((weakref ("Wf11b")));
 172
 173 static ftype Wf12 __attribute__((weakref ("wf12")));
 174 extern ftype wf12 __attribute__((weak));
 175
 176 static ftype Wf13 __attribute__((weakref ("wf13")));
 177 extern ftype wf13 __attribute__((weak));
 178
 179 static ftype Wf14a __attribute__((weakref ("wf14")));
 180 static ftype Wf14b __attribute__((weakref ("wf14")));
 181 extern ftype wf14 __attribute__((weak));
 182
 183 #ifndef __APPLE__
 184 #define chk(p) do { if (!p) abort (); } while (0)
 185 #else
 186 #define chk(p) /* */
 187 #endif
 188
 189 int main () {
 190   chk (!pv1a);
 191   chk (pv2a);
 192   chk (pv3a);
 193   chk (pv4a);
 194   chk (pv4);
 195   chk (pv5a);
 196   chk (pv5);
 197   chk (!pv6a);
 198   chk (fv7 ());
 199   chk (fv7a ());
 200   chk (fv8 ());
 201   chk (fv8a ());
 202   chk (!pv9a);
 203   chk (!&Wv10a);
 204   chk (!&Wv11a);
 205   chk (!&Wv12);
 206   chk (!&wv12);
 207   chk (!&wv13);
 208   chk (!&Wv14a);
 209
 210   chk (!pf1a);
 211   chk (!pf1c);
 212   chk (pf2a);
 213   chk (pf3a);
 214   chk (pf4a);
 215   chk (pf4);
 216   chk (pf5a);
 217   chk (pf5);
 218   chk (!pf6a);
 219   chk (ff7 ());
 220   chk (ff7a ());
 221   chk (ff8 ());
 222   chk (ff8a ());
 223   chk (!pf9a);
 224   chk (!&Wf10a);
 225   chk (!&Wf11a);
 226   chk (!&Wf12);
 227   chk (!&wf12);
 228   chk (!&wf13);
 229   chk (!&Wf14a);
 230
 231   exit (0);
 232 }