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 "" { "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-options "-Wl,-undefined,dynamic_lookup" { target *-*-darwin* } }
  14 // { dg-additional-options "-Wl,-flat_namespace" { target *-*-darwin[89]* } }
  15 // { dg-additional-sources "attr-weakref-1a.c" }
  16
  17 // Copyright 2005 Free Software Foundation, Inc.
  18 // Contributed by Alexandre Oliva <aoliva@redhat.com>
  19
  20 // Torture test for weakrefs.  The first letter of an identifier
  21 // indicates whether/how it is defined; the second letter indicates
  22 // whether it is part of a variable or function test; the number that
  23 // follows is a test counter, and a letter that may follow enables
  24 // multiple identifiers within the same test (e.g., multiple weakrefs
  25 // or pointers to the same identifier).
  26
  27 // Identifiers starting with W are weakrefs; those with p are
  28 // pointers; those with g are global definitions; those with l are
  29 // local definitions; those with w are expected to be weak undefined
  30 // in the symbol table; those with u are expected to be marked as
  31 // non-weak undefined in the symbol table.
  32
  33 #include <stdlib.h>
  34
  35 #define USED __attribute__((used))
  36
  37 typedef int vtype;
  38
  39 extern vtype wv1;
  40 static vtype Wv1a __attribute__((weakref ("wv1")));
  41 static vtype *pv1a USED = &Wv1a;
  42
  43 vtype gv2;
  44 static vtype Wv2a __attribute__((weakref ("gv2")));
  45 static vtype *pv2a USED = &Wv2a;
  46
  47 static vtype lv3;
  48 static vtype Wv3a __attribute__((weakref ("lv3")));
  49 static vtype *pv3a USED = &Wv3a;
  50
  51 extern vtype uv4;
  52 static vtype Wv4a __attribute__((weakref ("uv4")));
  53 static vtype *pv4a USED = &Wv4a;
  54 static vtype *pv4 USED = &uv4;
  55
  56 static vtype Wv5a __attribute__((weakref ("uv5")));
  57 static vtype *pv5a USED = &Wv5a;
  58 extern vtype uv5;
  59 static vtype *pv5 USED = &uv5;
  60
  61 static vtype Wv6a __attribute__((weakref ("wv6")));
  62 static vtype *pv6a USED = &Wv6a;
  63 extern vtype wv6;
  64
  65 static vtype Wv7a __attribute__((weakref ("uv7")));
  66 static vtype* USED fv7 (void) {
  67   return &Wv7a;
  68 }
  69 extern vtype uv7;
  70 static vtype* USED fv7a (void) {
  71   return &uv7;
  72 }
  73
  74 extern vtype uv8;
  75 static vtype* USED fv8a (void) {
  76   return &uv8;
  77 }
  78 static vtype Wv8a __attribute__((weakref ("uv8")));
  79 static vtype* USED fv8 (void) {
  80   return &Wv8a;
  81 }
  82
  83 extern vtype wv9 __attribute__((weak));
  84 static vtype Wv9a __attribute__((weakref ("wv9")));
  85 static vtype *pv9a USED = &Wv9a;
  86
  87 static vtype Wv10a __attribute__((weakref ("Wv10b")));
  88 static vtype Wv10b __attribute__((weakref ("Wv10c")));
  89 static vtype Wv10c __attribute__((weakref ("Wv10d")));
  90 static vtype Wv10d __attribute__((weakref ("wv10")));
  91 extern vtype wv10;
  92
  93 extern vtype wv11;
  94 static vtype Wv11d __attribute__((weakref ("wv11")));
  95 static vtype Wv11c __attribute__((weakref ("Wv11d")));
  96 static vtype Wv11b __attribute__((weakref ("Wv11c")));
  97 static vtype Wv11a __attribute__((weakref ("Wv11b")));
  98
  99 static vtype Wv12 __attribute__((weakref ("wv12")));
 100 extern vtype wv12 __attribute__((weak));
 101
 102 static vtype Wv13 __attribute__((weakref ("wv13")));
 103 extern vtype wv13 __attribute__((weak));
 104
 105 static vtype Wv14a __attribute__((weakref ("wv14")));
 106 static vtype Wv14b __attribute__((weakref ("wv14")));
 107 extern vtype wv14 __attribute__((weak));
 108
 109 typedef void ftype(void);
 110
 111 extern ftype wf1;
 112 static ftype Wf1a __attribute__((weakref ("wf1")));
 113 static ftype *pf1a USED = &Wf1a;
 114 static ftype Wf1c __attribute__((weakref));
 115 extern ftype Wf1c __attribute__((alias ("wf1")));
 116 static ftype *pf1c USED = &Wf1c;
 117
 118 void gf2(void) {}
 119 static ftype Wf2a __attribute__((weakref ("gf2")));
 120 static ftype *pf2a USED = &Wf2a;
 121
 122 static void lf3(void) {}
 123 static ftype Wf3a __attribute__((weakref ("lf3")));
 124 static ftype *pf3a USED = &Wf3a;
 125
 126 extern ftype uf4;
 127 static ftype Wf4a __attribute__((weakref ("uf4")));
 128 static ftype *pf4a USED = &Wf4a;
 129 static ftype *pf4 USED = &uf4;
 130
 131 static ftype Wf5a __attribute__((weakref ("uf5")));
 132 static ftype *pf5a USED = &Wf5a;
 133 extern ftype uf5;
 134 static ftype *pf5 USED = &uf5;
 135
 136 static ftype Wf6a __attribute__((weakref ("wf6")));
 137 static ftype *pf6a USED = &Wf6a;
 138 extern ftype wf6;
 139
 140 static ftype Wf7a __attribute__((weakref ("uf7")));
 141 static ftype* USED ff7 (void) {
 142   return &Wf7a;
 143 }
 144 extern ftype uf7;
 145 static ftype* USED ff7a (void) {
 146   return &uf7;
 147 }
 148
 149 extern ftype uf8;
 150 static ftype* USED ff8a (void) {
 151   return &uf8;
 152 }
 153 static ftype Wf8a __attribute__((weakref ("uf8")));
 154 static ftype* USED ff8 (void) {
 155   return &Wf8a;
 156 }
 157
 158 extern ftype wf9 __attribute__((weak));
 159 static ftype Wf9a __attribute__((weakref ("wf9")));
 160 static ftype *pf9a USED = &Wf9a;
 161
 162 static ftype Wf10a __attribute__((weakref ("Wf10b")));
 163 static ftype Wf10b __attribute__((weakref ("Wf10c")));
 164 static ftype Wf10c __attribute__((weakref ("Wf10d")));
 165 static ftype Wf10d __attribute__((weakref ("wf10")));
 166 extern ftype wf10;
 167
 168 extern ftype wf11;
 169 static ftype Wf11d __attribute__((weakref ("wf11")));
 170 static ftype Wf11c __attribute__((weakref ("Wf11d")));
 171 static ftype Wf11b __attribute__((weakref ("Wf11c")));
 172 static ftype Wf11a __attribute__((weakref ("Wf11b")));
 173
 174 static ftype Wf12 __attribute__((weakref ("wf12")));
 175 extern ftype wf12 __attribute__((weak));
 176
 177 static ftype Wf13 __attribute__((weakref ("wf13")));
 178 extern ftype wf13 __attribute__((weak));
 179
 180 static ftype Wf14a __attribute__((weakref ("wf14")));
 181 static ftype Wf14b __attribute__((weakref ("wf14")));
 182 extern ftype wf14 __attribute__((weak));
 183
 184 #ifndef __APPLE__
 185 #define chk(p) do { if (!p) abort (); } while (0)
 186 #else
 187 #define chk(p) /* */
 188 #endif
 189
 190 int main () {
 191   chk (!pv1a);
 192   chk (pv2a);
 193   chk (pv3a);
 194   chk (pv4a);
 195   chk (pv4);
 196   chk (pv5a);
 197   chk (pv5);
 198   chk (!pv6a);
 199   chk (fv7 ());
 200   chk (fv7a ());
 201   chk (fv8 ());
 202   chk (fv8a ());
 203   chk (!pv9a);
 204   chk (!&Wv10a);
 205   chk (!&Wv11a);
 206   chk (!&Wv12);
 207   chk (!&wv12);
 208   chk (!&wv13);
 209   chk (!&Wv14a);
 210
 211   chk (!pf1a);
 212   chk (!pf1c);
 213   chk (pf2a);
 214   chk (pf3a);
 215   chk (pf4a);
 216   chk (pf4);
 217   chk (pf5a);
 218   chk (pf5);
 219   chk (!pf6a);
 220   chk (ff7 ());
 221   chk (ff7a ());
 222   chk (ff8 ());
 223   chk (ff8a ());
 224   chk (!pf9a);
 225   chk (!&Wf10a);
 226   chk (!&Wf11a);
 227   chk (!&Wf12);
 228   chk (!&wf12);
 229   chk (!&wf13);
 230   chk (!&Wf14a);
 231
 232   exit (0);
 233 }