C++ (Cpp) __builtin_snprintf示例

示例#1

文件： taint-generic.c 项目： jvesely/clang

void testTaintSystemCall3() {
  char buffern2[156];
  int numt;
  char addr[128];
  scanf("%s %d", addr, &numt);
  __builtin_snprintf(buffern2, numt, "/bin/mail %s < /tmp/email", "abcd");
  system(buffern2); // expected-warning {{Untrusted data is passed to a system call}}
}

示例#2

文件： taint-generic.c 项目： jvesely/clang

void testTaintSystemCall2() {
  // Test that snpintf transfers taint.
  char buffern[156];
  char addr[128];
  scanf("%s", addr);
  __builtin_snprintf(buffern, 10, "/bin/mail %s < /tmp/email", addr);
  system(buffern); // expected-warning {{Untrusted data is passed to a system call}}
}

示例#3

文件： builtin-sprintf-4.c 项目： krichter722/gcc

int f1 (const char *s)
{
  int n = __builtin_snprintf (buf, 64, "%.*s%08x", 1, s, 1);

  ASSERT (7 < n && n < 10);

  ASSERT_MAYBE (8 == n);
  ASSERT_MAYBE (9 == n);

  return n;
}

示例#4

文件： builtin-sprintf-4.c 项目： krichter722/gcc

int f2 (const char *s)
{
  int n = __builtin_snprintf (0, 0, "%.*s", 2, s);

  ASSERT (0 <= n && n <= 2);

  ASSERT_MAYBE (0 == n);
  ASSERT_MAYBE (1 == n);
  ASSERT_MAYBE (2 == n);

  return n;
}