gcc/testsuite/g++.dg/ubsan/vptr-2.C

   1 // { dg-do run { target { ilp32 || lp64 } } }
   2 // { dg-options "-fsanitize=vptr" }
   3
   4 struct S
   5 {
   6   S() : a(0) {}
   7   ~S() {}
   8   int a;
   9   int f() { return 0; }
  10   virtual int v() { return 0; }
  11 };
  12
  13 struct T : S
  14 {
  15   T() : b(0) {}
  16   int b;
  17   int g() { return 0; }
  18   virtual int v() { return 1; }
  19 };
  20
  21 struct U : S, T { virtual int v() { return 2; } }; // { dg-warning "direct base .S. inaccessible in .U. due to ambiguity" }
  22 struct V : S {};
  23
  24 void
  25 foo ()
  26 {
  27   T t;
  28   (void)t.a;
  29   (void)t.b;
  30   (void)t.f();
  31   (void)t.g();
  32   (void)t.v();
  33   (void)t.S::v();
  34
  35   U u;
  36   (void)u.T::a;
  37   (void)u.b;
  38   (void)u.T::f();
  39   (void)u.g();
  40   (void)u.v();
  41   (void)u.T::v();
  42   (void)((T&)u).S::v();
  43 }
  44
  45 T *x;
  46 template <typename S, typename T, typename U>
  47 __attribute__((noinline, noclone)) int
  48 bar (T *p, int q)
  49 {
  50   switch (q)
  51     {
  52     // These shouldn't fail:
  53     case 0x10:
  54     case 0x20:
  55     case 0x30:
  56     case 0x40:
  57       {
  58         T &r = *p;
  59         break;
  60       }
  61     case 0x21:
  62     case 0x31:
  63       return p->b;
  64     case 0x22:
  65     case 0x32:
  66       return p->g ();
  67     case 0x23:
  68     case 0x33:
  69       x = static_cast<T*>(reinterpret_cast<S*>(p));
  70       break;
  71     case 0x44:
  72       return reinterpret_cast<U*>(p)->v() - 2;
  73     // These should:
  74     case 0x11:
  75       return p->b;
  76     // { dg-output "\[^\n\r]*vptr-2.C:75:\[0-9]*: runtime error: member access within address 0x\[0-9a-fA-F]* which does not point to an object of type 'T'(\n|\r\n|\r)" }
  77     // { dg-output "0x\[0-9a-fA-F]*: note: object is of type 'S'(\n|\r\n|\r)" }
  78     // { dg-output " .. .. .. ..  .. .. .. .. .. .. .. ..  \[^\n\r]*(\n|\r\n|\r)" }
  79     // { dg-output "              \\^~~~~~~~~~~\[^\n\r]*(\n|\r\n|\r)" }
  80     // { dg-output "              vptr for 'S'\[^\n\r]*(\n|\r\n|\r)" }
  81     case 0x12:
  82       return p->g ();
  83     // { dg-output "\[^\n\r]*vptr-2.C:82:\[0-9]*: runtime error: member call on address 0x\[0-9a-fA-F]* which does not point to an object of type 'T'(\n|\r\n|\r)" }
  84     // { dg-output "0x\[0-9a-fA-F]*: note: object is of type 'S'(\n|\r\n|\r)" }
  85     // { dg-output " .. .. .. ..  .. .. .. .. .. .. .. ..  \[^\n\r]*(\n|\r\n|\r)" }
  86     // { dg-output "              \\^~~~~~~~~~~\[^\n\r]*(\n|\r\n|\r)" }
  87     // { dg-output "              vptr for 'S'\[^\n\r]*(\n|\r\n|\r)" }
  88     case 0x13:
  89       x = static_cast<T*>(reinterpret_cast<S*>(p));
  90       break;
  91     // { dg-output "\[^\n\r]*vptr-2.C:89:\[0-9]*: runtime error: downcast of address 0x\[0-9a-fA-F]* which does not point to an object of type 'T'(\n|\r\n|\r)" }
  92     // { dg-output "0x\[0-9a-fA-F]*: note: object is of type 'S'(\n|\r\n|\r)" }
  93     // { dg-output " .. .. .. ..  .. .. .. .. .. .. .. ..  \[^\n\r]*(\n|\r\n|\r)" }
  94     // { dg-output "              \\^~~~~~~~~~~\[^\n\r]*(\n|\r\n|\r)" }
  95     // { dg-output "              vptr for 'S'\[^\n\r]*(\n|\r\n|\r)" }
  96     case 0x34:
  97       return reinterpret_cast<U*>(p)->v() - 2;
  98     // { dg-output "\[^\n\r]*vptr-2.C:97:\[0-9]*: runtime error: member call on address 0x\[0-9a-fA-F]* which does not point to an object of type 'U'(\n|\r\n|\r)" }
  99     // { dg-output "0x\[0-9a-fA-F]*: note: object is base class subobject at offset 16 within object of type 'U'(\n|\r\n|\r)" { target lp64 } }
 100     // { dg-output "0x\[0-9a-fA-F]*: note: object is base class subobject at offset 8 within object of type 'U'(\n|\r\n|\r)" { target ilp32 } }
 101     // { dg-output " .. .. .. ..  .. .. .. .. .. .. .. ..  .. .. .. .. .. .. .. ..  .. .. .. .. .. .. .. ..  \[^\n\r]*(\n|\r\n|\r)" }
 102     // { dg-output "              \\^                                                 ~~~~~~~~~~~~~~~~~~~~~~~(\n|\r\n|\r)" { target lp64 } }
 103     // { dg-output "                                                                vptr for 'T' base class of 'U'\[^\n\r]*(\n|\r\n|\r)" { target lp64 } }
 104     // { dg-output "              \\^                        ~~~~~~~~~~~(\n|\r\n|\r)" { target ilp32 } }
 105     // { dg-output "                                       vptr for 'T' base class of 'U'\[^\n\r]*(\n|\r\n|\r)" { target ilp32 } }
 106     case 0x41:
 107       return p->b;
 108     // { dg-output "\[^\n\r]*vptr-2.C:107:\[0-9]*: runtime error: member access within address 0x\[0-9a-fA-F]* which does not point to an object of type 'T'(\n|\r\n|\r)" }
 109     // { dg-output "0x\[0-9a-fA-F]*: note: object is of type 'U'(\n|\r\n|\r)" }
 110     // { dg-output " .. .. .. ..  .. .. .. .. .. .. .. ..  \[^\n\r]*(\n|\r\n|\r)" }
 111     // { dg-output "              \\^~~~~~~~~~~\[^\n\r]*(\n|\r\n|\r)" }
 112     // { dg-output "              vptr for 'U'\[^\n\r]*(\n|\r\n|\r)" }
 113     case 0x42:
 114       return p->g ();
 115     // { dg-output "\[^\n\r]*vptr-2.C:114:\[0-9]*: runtime error: member call on address 0x\[0-9a-fA-F]* which does not point to an object of type 'T'(\n|\r\n|\r)" }
 116     // { dg-output "0x\[0-9a-fA-F]*: note: object is of type 'U'(\n|\r\n|\r)" }
 117     // { dg-output " .. .. .. ..  .. .. .. .. .. .. .. ..  \[^\n\r]*(\n|\r\n|\r)" }
 118     // { dg-output "              \\^~~~~~~~~~~\[^\n\r]*(\n|\r\n|\r)" }
 119     // { dg-output "              vptr for 'U'\[^\n\r]*(\n|\r\n|\r)" }
 120     case 0x43:
 121       x = static_cast<T*>(reinterpret_cast<S*>(p));
 122       break;
 123     // { dg-output "\[^\n\r]*vptr-2.C:121:\[0-9]*: runtime error: downcast of address 0x\[0-9a-fA-F]* which does not point to an object of type 'T'(\n|\r\n|\r)" }
 124     // { dg-output "0x\[0-9a-fA-F]*: note: object is of type 'U'(\n|\r\n|\r)" }
 125     // { dg-output " .. .. .. ..  .. .. .. .. .. .. .. ..  \[^\n\r]*(\n|\r\n|\r)" }
 126     // { dg-output "              \\^~~~~~~~~~~\[^\n\r]*(\n|\r\n|\r)" }
 127     // { dg-output "              vptr for 'U'\[^\n\r]*(\n|\r\n|\r)" }
 128     case 0x51:
 129       return p->b;
 130     // { dg-output "\[^\n\r]*vptr-2.C:129:\[0-9]*: runtime error: member access within address 0x\[0-9a-fA-F]* which does not point to an object of type 'T'(\n|\r\n|\r)" }
 131     // { dg-output "0x\[0-9a-fA-F]*: note: object has invalid vptr(\n|\r\n|\r)" }
 132     // { dg-output " .. .. .. ..  00 00 00 00 00 00 00 00  \[^\n\r]*(\n|\r\n|\r)" { target lp64 } }
 133     // { dg-output "              \\^~~~~~~~~~~~~~~~~~~~~~~\[^\n\r]*(\n|\r\n|\r)" { target lp64 } }
 134     // { dg-output "  ?.. .. .. ..  ?00 00 00 00  ?.. .. .. ..  ?\[^\n\r]*(\n|\r\n|\r)" { target ilp32 } }
 135     // { dg-output "              \\^~~~~~~~~~~\[^\n\r]*(\n|\r\n|\r)" { target ilp32 } }
 136     // { dg-output "              invalid vptr" }
 137     }
 138   return 0;
 139 }
 140
 141 char b[sizeof (U)] __attribute__((aligned (__alignof__ (U)))) = {};
 142
 143 __attribute__((noinline, noclone)) void
 144 baz (int q)
 145 {
 146   T *p = 0;
 147   S *s = 0;
 148   U *u = 0;
 149   switch (q)
 150     {
 151     case 0x10: case 0x11: case 0x12: case 0x13:
 152       s = new S;
 153       bar<S, T, U> (reinterpret_cast<T *>(s), q);
 154       delete s;
 155       break;
 156     case 0x20: case 0x21: case 0x22: case 0x23:
 157       p = new T;
 158       bar<S, T, U> (p, q);
 159       delete p;
 160       break;
 161     case 0x30: case 0x31: case 0x32: case 0x33: case 0x34:
 162       u = new U;
 163       bar<S, T, U> (u, q);
 164       delete u;
 165       break;
 166     case 0x40: case 0x41: case 0x42: case 0x43: case 0x44:
 167       u = new U;
 168       bar<S, T, U> (reinterpret_cast<T *>(u), q);
 169       delete u;
 170       break;
 171     case 0x51:
 172       p = reinterpret_cast<T*>(b);
 173       bar<S, T, U> (p, q);
 174       break;
 175     }
 176 }
 177
 178 int
 179 main ()
 180 {
 181   foo ();
 182   for (int q = 0; q < 0x52; q++)
 183     baz (q);
 184 }