Function test_memset

test/test_memset_alignment.c:15–52

#define GUARDSIZE 32
void test_memset(int copySize, int offset) {
  char *content = ptr + GUARDSIZE + offset;

  char *guardBefore = content - GUARDSIZE;
  char *guardAfter  = content + copySize;

  char guard = (char)rand();

  for (int i = 0; i < GUARDSIZE; ++i) {
    // Generate a guardband area around memory that should not change.
    guardBefore[i] = (char)(guard ^ i);
    guardAfter[i] = (char)(guard ^ i);
  }

  // Generate fill source data
  char s = (char)(rand() ^ 0xF0);

  memset(content, s, copySize);
  for (int i = 0; i < copySize; ++i) {
    if (content[i] != s) {
      printf("test_memset(copySize=%d, offset=%d failed!\n", copySize, offset);
      exit(1);
    }
  }

  // Verify guardband area
  for (int i = 0; i < GUARDSIZE; ++i) {
    // Generate a guardband area around memory that should not change.
    if (guardBefore[i] != (char)(guard ^ i)) {
      printf("test_memset(copySize=%d, offset=%d failed! Pre-guardband area at i=%d overwritten!\n", copySize, offset, i);
      exit(1);
    }
    if (guardAfter[i] != (char)(guard ^ i)) {
      printf("test_memset(copySize=%d, offset=%d failed! Post-guardband area at i=%d overwritten!\n", copySize, offset, i);
      exit(1);
    }
  }
}

void test_copysize(int copySize) {
  for (int offset = 0; offset < 31; ++offset) {