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
   5 // This test requires support for undefined weak symbols.  This support
   6 // is not available on the following targets.  The test is skipped rather than
   7 // xfailed to suppress the warning that would otherwise arise.
   8 // { dg-skip-if "" { "hppa*-*-hpux*" "*-*-aix*" "nvptx-*-*" } }
   9
  10 // For kernel modules and static RTPs, the loader treats undefined weak
  11 // symbols in the same way as undefined strong symbols.  The test
  12 // therefore fails to load, so skip it.
  13 // { dg-skip-if "" { "*-*-vxworks*" && nonpic } "*" { "-non-static" } }
  14 // { dg-options "-O2" }
  15 // { dg-additional-options "-Wl,-undefined,dynamic_lookup" { target *-*-darwin* } }
  16 // { dg-additional-options "-Wl,-flat_namespace" { target *-*-darwin[89]* } }
  17 // { dg-additional-sources "attr-weakref-1a.c" }
  18
  19 // Copyright 2005 Free Software Foundation, Inc.
  20 // Contributed by Alexandre Oliva <aoliva@redhat.com>
  21
  22 // Torture test for weakrefs.  The first letter of an identifier
  23 // indicates whether/how it is defined; the second letter indicates
  24 // whether it is part of a variable or function test; the number that
  25 // follows is a test counter, and a letter that may follow enables
  26 // multiple identifiers within the same test (e.g., multiple weakrefs
  27 // or pointers to the same identifier).
  28
  29 // Identifiers starting with W are weakrefs; those with p are
  30 // pointers; those with g are global definitions; those with l are
  31 // local definitions; those with w are expected to be weak undefined
  32 // in the symbol table; those with u are expected to be marked as
  33 // non-weak undefined in the symbol table.
  34
  35 #include <stdlib.h>
  36
  37 #define USED __attribute__((used))
  38
  39 typedef int vtype;
  40
  41 extern vtype wv1;
  42 static vtype Wv1a __attribute__((weakref ("wv1")));
  43 static vtype *pv1a USED = &Wv1a;
  44
  45 vtype gv2;
  46 static vtype Wv2a __attribute__((weakref ("gv2")));
  47 static vtype *pv2a USED = &Wv2a;
  48
  49 static vtype lv3;
  50 static vtype Wv3a __attribute__((weakref ("lv3")));
  51 static vtype *pv3a USED = &Wv3a;
  52
  53 extern vtype uv4;
  54 static vtype Wv4a __attribute__((weakref ("uv4")));
  55 static vtype *pv4a USED = &Wv4a;
  56 static vtype *pv4 USED = &uv4;
  57
  58 static vtype Wv5a __attribute__((weakref ("uv5")));
  59 static vtype *pv5a USED = &Wv5a;
  60 extern vtype uv5;
  61 static vtype *pv5 USED = &uv5;
  62
  63 static vtype Wv6a __attribute__((weakref ("wv6")));
  64 static vtype *pv6a USED = &Wv6a;
  65 extern vtype wv6;
  66
  67 static vtype Wv7a __attribute__((weakref ("uv7")));
  68 static vtype* USED fv7 (void) {
  69   return &Wv7a;
  70 }
  71 extern vtype uv7;
  72 static vtype* USED fv7a (void) {
  73   return &uv7;
  74 }
  75
  76 extern vtype uv8;
  77 static vtype* USED fv8a (void) {
  78   return &uv8;
  79 }
  80 static vtype Wv8a __attribute__((weakref ("uv8")));
  81 static vtype* USED fv8 (void) {
  82   return &Wv8a;
  83 }
  84
  85 extern vtype wv9 __attribute__((weak));
  86 static vtype Wv9a __attribute__((weakref ("wv9")));
  87 static vtype *pv9a USED = &Wv9a;
  88
  89 static vtype Wv10a __attribute__((weakref ("Wv10b")));
  90 static vtype Wv10b __attribute__((weakref ("Wv10c")));
  91 static vtype Wv10c __attribute__((weakref ("Wv10d")));
  92 static vtype Wv10d __attribute__((weakref ("wv10")));
  93 extern vtype wv10;
  94
  95 extern vtype wv11;
  96 static vtype Wv11d __attribute__((weakref ("wv11")));
  97 static vtype Wv11c __attribute__((weakref ("Wv11d")));
  98 static vtype Wv11b __attribute__((weakref ("Wv11c")));
  99 static vtype Wv11a __attribute__((weakref ("Wv11b")));
 100
 101 static vtype Wv12 __attribute__((weakref ("wv12")));
 102 extern vtype wv12 __attribute__((weak));
 103
 104 static vtype Wv13 __attribute__((weakref ("wv13")));
 105 extern vtype wv13 __attribute__((weak));
 106
 107 static vtype Wv14a __attribute__((weakref ("wv14")));
 108 static vtype Wv14b __attribute__((weakref ("wv14")));
 109 extern vtype wv14 __attribute__((weak));
 110
 111 typedef void ftype(void);
 112
 113 extern ftype wf1;
 114 static ftype Wf1a __attribute__((weakref ("wf1")));
 115 static ftype *pf1a USED = &Wf1a;
 116 static ftype Wf1c __attribute__((weakref));
 117 extern ftype Wf1c __attribute__((alias ("wf1")));
 118 static ftype *pf1c USED = &Wf1c;
 119
 120 void gf2(void) {}
 121 static ftype Wf2a __attribute__((weakref ("gf2")));
 122 static ftype *pf2a USED = &Wf2a;
 123
 124 static void lf3(void) {}
 125 static ftype Wf3a __attribute__((weakref ("lf3")));
 126 static ftype *pf3a USED = &Wf3a;
 127
 128 extern ftype uf4;
 129 static ftype Wf4a __attribute__((weakref ("uf4")));
 130 static ftype *pf4a USED = &Wf4a;
 131 static ftype *pf4 USED = &uf4;
 132
 133 static ftype Wf5a __attribute__((weakref ("uf5")));
 134 static ftype *pf5a USED = &Wf5a;
 135 extern ftype uf5;
 136 static ftype *pf5 USED = &uf5;
 137
 138 static ftype Wf6a __attribute__((weakref ("wf6")));
 139 static ftype *pf6a USED = &Wf6a;
 140 extern ftype wf6;
 141
 142 static ftype Wf7a __attribute__((weakref ("uf7")));
 143 static ftype* USED ff7 (void) {
 144   return &Wf7a;
 145 }
 146 extern ftype uf7;
 147 static ftype* USED ff7a (void) {
 148   return &uf7;
 149 }
 150
 151 extern ftype uf8;
 152 static ftype* USED ff8a (void) {
 153   return &uf8;
 154 }
 155 static ftype Wf8a __attribute__((weakref ("uf8")));
 156 static ftype* USED ff8 (void) {
 157   return &Wf8a;
 158 }
 159
 160 extern ftype wf9 __attribute__((weak));
 161 static ftype Wf9a __attribute__((weakref ("wf9")));
 162 static ftype *pf9a USED = &Wf9a;
 163
 164 static ftype Wf10a __attribute__((weakref ("Wf10b")));
 165 static ftype Wf10b __attribute__((weakref ("Wf10c")));
 166 static ftype Wf10c __attribute__((weakref ("Wf10d")));
 167 static ftype Wf10d __attribute__((weakref ("wf10")));
 168 extern ftype wf10;
 169
 170 extern ftype wf11;
 171 static ftype Wf11d __attribute__((weakref ("wf11")));
 172 static ftype Wf11c __attribute__((weakref ("Wf11d")));
 173 static ftype Wf11b __attribute__((weakref ("Wf11c")));
 174 static ftype Wf11a __attribute__((weakref ("Wf11b")));
 175
 176 static ftype Wf12 __attribute__((weakref ("wf12")));
 177 extern ftype wf12 __attribute__((weak));
 178
 179 static ftype Wf13 __attribute__((weakref ("wf13")));
 180 extern ftype wf13 __attribute__((weak));
 181
 182 static ftype Wf14a __attribute__((weakref ("wf14")));
 183 static ftype Wf14b __attribute__((weakref ("wf14")));
 184 extern ftype wf14 __attribute__((weak));
 185
 186 #ifndef __APPLE__
 187 #define chk(p) do { if (!p) abort (); } while (0)
 188 #else
 189 #define chk(p) /* */
 190 #endif
 191
 192 int main () {
 193   chk (!pv1a);
 194   chk (pv2a);
 195   chk (pv3a);
 196   chk (pv4a);
 197   chk (pv4);
 198   chk (pv5a);
 199   chk (pv5);
 200   chk (!pv6a);
 201   chk (fv7 ());
 202   chk (fv7a ());
 203   chk (fv8 ());
 204   chk (fv8a ());
 205   chk (!pv9a);
 206   chk (!&Wv10a);
 207   chk (!&Wv11a);
 208   chk (!&Wv12);
 209   chk (!&wv12);
 210   chk (!&wv13);
 211   chk (!&Wv14a);
 212
 213   chk (!pf1a);
 214   chk (!pf1c);
 215   chk (pf2a);
 216   chk (pf3a);
 217   chk (pf4a);
 218   chk (pf4);
 219   chk (pf5a);
 220   chk (pf5);
 221   chk (!pf6a);
 222   chk (ff7 ());
 223   chk (ff7a ());
 224   chk (ff8 ());
 225   chk (ff8a ());
 226   chk (!pf9a);
 227   chk (!&Wf10a);
 228   chk (!&Wf11a);
 229   chk (!&Wf12);
 230   chk (!&wf12);
 231   chk (!&wf13);
 232   chk (!&Wf14a);
 233
 234   exit (0);
 235 }