gcc/testsuite/gcc.dg/attr-alloc_size-11.c

   1 /* Verify that -Walloc-size-greater-than doesn't cause false positives
   2    for anti-ranges.  Note that not all of the statements below result
   3    in the argument being represented as an anti-range.
   4
   5    { dg-do compile }
   6    { dg-options "-O2 -Walloc-size-larger-than=12 -ftrack-macro-expansion=0" } */
   7
   8 #define SCHAR_MAX __SCHAR_MAX__
   9 #define SCHAR_MIN (-SCHAR_MAX - 1)
  10 #define UCHAR_MAX (SCHAR_MAX * 2 + 1)
  11
  12 #define SHRT_MAX  __SHRT_MAX__
  13 #define SHRT_MIN  (-SHRT_MAX - 1)
  14 #define USHRT_MAX (SHRT_MAX * 2U + 1)
  15
  16 #define INT_MAX   __INT_MAX__
  17 #define INT_MIN   (-INT_MAX - 1)
  18 #define UINT_MAX  (INT_MAX * 2U + 1)
  19
  20 #define LONG_MAX __LONG_MAX__
  21 #define LONG_MIN (-LONG_MAX - 1)
  22 #define ULONG_MAX (LONG_MAX * 2LU + 1)
  23
  24 #define PTRDIFF_MAX __PTRDIFF_MAX__
  25 #define PTRDIFF_MIN (-PTRDIFF_MAX - 1)
  26 #define SIZE_MAX    __SIZE_MAX__
  27
  28 #define ALLOC_MAX   12
  29
  30 typedef __PTRDIFF_TYPE__ ptrdiff_t;
  31 typedef __SIZE_TYPE__    size_t;
  32
  33 #define CONCAT(a, b)  a ## b
  34 #define CAT(a, b)     CONCAT (a, b)
  35
  36 /* Macro to generate a unique function to test the anti-range
  37    ~[MIN, MAX] for type T.  */
  38 #define TEST(T, min, max)                                       \
  39   void* CAT (test_anti_range_, __LINE__)(T n)                   \
  40   {                                                             \
  41     extern void* CAT (alloc_anti_range_, __LINE__)(T)           \
  42       __attribute__ ((alloc_size (1)));                         \
  43     if (min <= n && n <= max)                                   \
  44       n = min - 1;                                              \
  45     return CAT (alloc_anti_range_, __LINE__)(n);                \
  46   } typedef void dummy   /* Require a semicolon.  */
  47
  48 /* The following tests fail because of missing range information.  The xfail
  49    exclusions are PR79356.  */
  50 TEST (signed char, SCHAR_MIN + 2, ALLOC_MAX);   /* { dg-warning "argument 1 range \\\[13, \[0-9\]+\\\] exceeds maximum object size 12" "missing range info for signed char" { xfail { ! { aarch64*-*-* arm*-*-* avr-*-* alpha*-*-* ia64-*-* mips*-*-* or1k*-*-* pdp11*-*-* powerpc*-*-* sparc*-*-* s390*-*-* visium-*-* msp430-*-* nvptx*-*-*} } } } */
  51 TEST (short, SHRT_MIN + 2, ALLOC_MAX); /* { dg-warning "argument 1 range \\\[13, \[0-9\]+\\\] exceeds maximum object size 12" "missing range info for short" { xfail { ! { aarch64*-*-* arm*-*-* alpha*-*-* avr-*-* ia64-*-* mips*-*-* or1k*-*-* pdp11*-*-* powerpc*-*-* sparc*-*-* s390x-*-* visium-*-* msp430-*-* nvptx*-*-* } } } } */
  52 TEST (int, INT_MIN + 2, ALLOC_MAX);    /* { dg-warning "argument 1 range \\\[13, \[0-9\]+\\\] exceeds maximum object size 12" } */
  53 TEST (int, -3, ALLOC_MAX);             /* { dg-warning "argument 1 range \\\[13, \[0-9\]+\\\] exceeds maximum object size 12" } */
  54 TEST (int, -2, ALLOC_MAX);             /* { dg-warning "argument 1 range \\\[13, \[0-9\]+\\\] exceeds maximum object size 12" } */
  55 TEST (int, -1, ALLOC_MAX);             /* { dg-warning "argument 1 range \\\[13, \[0-9\]+\\\] exceeds maximum object size 12" } */
  56 TEST (int,  0, ALLOC_MAX);             /* { dg-warning "argument 1 range \\\[13, \[0-9\]+\\\] exceeds maximum object size 12" } */
  57 TEST (int,  1, ALLOC_MAX);             /* { dg-warning "argument 1 range \\\[13, \[0-9\]+\\\] exceeds maximum object size 12" } */
  58 TEST (int,  1, INT_MAX - 1);           /* { dg-warning "argument 1 range \\\[\[0-9\]+, \[0-9\]+\\\] exceeds maximum object size 12" } */
  59
  60 /* The following two aren't necessarily anti-ranges.  */
  61 TEST (int,  1, INT_MAX);               /* { dg-warning "argument 1 range \\\[-\[0-9\]+, 0\\\] is negative" } */
  62 TEST (int,  0, INT_MAX);               /* { dg-warning "argument 1 range \\\[-\[0-9\]+, -1\\\] is negative" } */
  63
  64 TEST (long, LONG_MIN + 2, ALLOC_MAX);  /* { dg-warning "argument 1 range \\\[13, \[0-9\]+\\\] exceeds maximum object size 12" } */
  65 TEST (ptrdiff_t, PTRDIFF_MIN + 2, ALLOC_MAX);  /* { dg-warning "argument 1 range \\\[13, \[0-9\]+\\\] exceeds maximum object size 12" } */
  66
  67 TEST (unsigned, 0, ALLOC_MAX);         /* { dg-warning "argument 1 range \\\[13, \[0-9\]+\\\] exceeds maximum object size 12" } */
  68 TEST (unsigned long, 0, ALLOC_MAX);    /* { dg-warning "argument 1 range \\\[13, \[0-9\]+\\\] exceeds maximum object size 12" } */
  69 TEST (size_t, 0, ALLOC_MAX);           /* { dg-warning "argument 1 range \\\[13, \[0-9\]+\\\] exceeds maximum object size 12" } */