compiler-rt/test/msan/iconv.cpp

   1 // RUN: %clangxx_msan -O0 -g %s -o %t && %run %t
   2 // RUN: %clangxx_msan -O0 -g -DPOSITIVE %s -o %t && not %run %t 2>&1 | FileCheck %s
   3
   4 #include <assert.h>
   5 #include <iconv.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include <stdio.h>
   9 #include <errno.h>
  10
  11 #if defined(__NetBSD__)
  12 #include <sys/param.h>
  13 #if __NetBSD_Prereq__(9,99,17)
  14 #define NETBSD_POSIX_ICONV 1
  15 #else
  16 #define NETBSD_POSIX_ICONV 0
  17 #endif
  18 #endif
  19
  20 int main(void) {
  21   iconv_t cd = iconv_open("ASCII", "ASCII");
  22   assert(cd != (iconv_t)-1);
  23
  24   char inbuf_[100];
  25   strcpy(inbuf_, "sample text");
  26   char outbuf_[100];
  27 #if defined(__NetBSD__) && !NETBSD_POSIX_ICONV
  28   // Some OSes expect the 2nd argument of iconv(3) to be of type const char **
  29   const char *inbuf = inbuf_;
  30 #else
  31   char *inbuf = inbuf_;
  32 #endif
  33   char *outbuf = outbuf_;
  34   size_t inbytesleft = strlen(inbuf_);
  35   size_t outbytesleft = sizeof(outbuf_);
  36
  37 #ifdef POSITIVE
  38   {
  39     char u;
  40     char *volatile p = &u;
  41     inbuf_[5] = *p;
  42   }
  43 #endif
  44
  45   size_t res;
  46   res = iconv(cd, 0, 0, 0, 0);
  47   assert(res != (size_t)-1);
  48
  49   res = iconv(cd, 0, 0, &outbuf, &outbytesleft);
  50   assert(res != (size_t)-1);
  51
  52   res = iconv(cd, &inbuf, &inbytesleft, &outbuf, &outbytesleft);
  53   // CHECK: MemorySanitizer: use-of-uninitialized-value
  54   // CHECK: #0 {{.*}} in main {{.*}}iconv.cpp:[[@LINE-2]]
  55   assert(res != (size_t)-1);
  56   assert(inbytesleft == 0);
  57
  58   assert(memcmp(inbuf_, outbuf_, strlen(inbuf_)) == 0);
  59
  60   iconv_close(cd);
  61   return 0;
  62 }