src/test/test_ptr_slow.c

   1 /* Copyright (c) 2001-2004, Roger Dingledine.
   2  * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
   3  * Copyright (c) 2007-2020, The Tor Project, Inc. */
   4 /* See LICENSE for licensing information */
   5
   6 #include "orconfig.h"
   7 #include "core/or/or.h"
   8 #include "test/test.h"
   9 #include "test/ptr_helpers.h"
  10
  11 #include <stdint.h>
  12 #include <limits.h>
  13
  14 /** Assert that <b>a</b> can be cast to void * and back. */
  15 static void
  16 assert_int_voidptr_roundtrip(int a)
  17 {
  18   intptr_t ap = (intptr_t)a;
  19   void *b = cast_intptr_to_voidstar(ap);
  20   intptr_t c = cast_voidstar_to_intptr(b);
  21   void *d = cast_intptr_to_voidstar(c);
  22
  23   tt_assert(ap == c);
  24   tt_assert(b == d);
  25
  26  done:
  27   return;
  28 }
  29
  30 /** Test for possibility of casting `int` to `void *` and back. */
  31 static void
  32 test_int_voidstar_interop(void *arg)
  33 {
  34   int a;
  35   (void)arg;
  36
  37   for (a = -1024; a <= 1024; a++) {
  38     assert_int_voidptr_roundtrip(a);
  39   }
  40
  41   for (a = INT_MIN; a <= INT_MIN+1024; a++) {
  42     assert_int_voidptr_roundtrip(a);
  43   }
  44
  45   for (a = INT_MAX-1024; a < INT_MAX; a++) {
  46     assert_int_voidptr_roundtrip(a);
  47   }
  48
  49   a = 1;
  50   for (unsigned long i = 0; i < sizeof(int) * 8; i++) {
  51     assert_int_voidptr_roundtrip(a);
  52     a = (a << 1);
  53   }
  54 }
  55
  56 /** Assert that <b>a</b> can be cast to void * and back. */
  57 static void
  58 assert_uint_voidptr_roundtrip(unsigned int a)
  59 {
  60  uintptr_t ap = (uintptr_t)a;
  61  void *b = cast_uintptr_to_voidstar(ap);
  62  uintptr_t c = cast_voidstar_to_uintptr(b);
  63  void *d = cast_uintptr_to_voidstar(c);
  64
  65  tt_assert(ap == c);
  66  tt_assert(b == d);
  67
  68  done:
  69   return;
  70 }
  71
  72 /** Test for possibility of casting `int` to `void *` and back. */
  73 static void
  74 test_uint_voidstar_interop(void *arg)
  75 {
  76   unsigned int a;
  77   (void)arg;
  78
  79   for (a = 0; a <= 1024; a++) {
  80     assert_uint_voidptr_roundtrip(a);
  81   }
  82
  83   for (a = UINT_MAX-1024; a < UINT_MAX; a++) {
  84     assert_uint_voidptr_roundtrip(a);
  85   }
  86
  87   a = 1;
  88   for (unsigned long i = 0; i < sizeof(int) * 8; i++) {
  89     assert_uint_voidptr_roundtrip(a);
  90     a = (a << 1);
  91   }
  92 }
  93
  94 struct testcase_t slow_ptr_tests[] = {
  95   { .name = "int_voidstar_interop",
  96     .fn = test_int_voidstar_interop,
  97     .flags = 0,
  98     .setup = NULL,
  99     .setup_data = NULL },
 100   { .name = "uint_voidstar_interop",
 101     .fn = test_uint_voidstar_interop,
 102     .flags = 0,
 103     .setup = NULL,
 104     .setup_data = NULL },
 105   END_OF_TESTCASES
 106 };