compiler-rt/test/hwasan/TestCases/malloc-align.c

   1 // Test malloc alignment.
   2 // RUN: %clang_hwasan -mllvm -hwasan-globals=0 %s -o %t
   3 // RUN: %run %t
   4
   5 #include <assert.h>
   6 #include <sanitizer/allocator_interface.h>
   7 #include <sanitizer/hwasan_interface.h>
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10
  11 static const size_t sizes[] = {
  12     1, 3, 7, 8, 9, 16, 17, 31, 32, 33,
  13     63, 64, 65, 127, 128, 129, 511, 512, 513, 2047,
  14     2048, 2049, 65535, 65536, 65537, 1048575, 1048576, 1048577};
  15 static const size_t alignments[] = {8, 16, 64, 256, 1024, 4096, 65536, 131072};
  16
  17 __attribute__((no_sanitize("hwaddress"))) int main() {
  18   for (unsigned i = 0; i < sizeof(sizes) / sizeof(*sizes); ++i) {
  19     for (unsigned j = 0; j < sizeof(alignments) / sizeof(*alignments); ++j) {
  20       size_t size = sizes[i];
  21       size_t alignment = alignments[j];
  22       fprintf(stderr, "size %zu, alignment %zu (0x%zx)\n", size, alignment,
  23               alignment);
  24       const int cnt = 10;
  25       void *ptrs[cnt];
  26       for (int k = 0; k < cnt; ++k) {
  27         int res = posix_memalign(&ptrs[k], alignment, size);
  28         assert(res == 0);
  29         fprintf(stderr, "... addr 0x%zx\n", (size_t)ptrs[k]);
  30         assert(((size_t)ptrs[k] & (alignment - 1)) == 0);
  31       }
  32       for (int k = 0; k < cnt; ++k)
  33         free(ptrs[k]);
  34     }
  35   }
  36   return 0;
  37 }