lib/msan/lit_tests/iconv.cc

   1 // RUN: %clangxx_msan -m64 -O0 -g %s -o %t && %t
   2 // RUN: %clangxx_msan -m64 -O0 -g -DPOSITIVE %s -o %t && not %t |& 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 int main(void) {
  12   iconv_t cd = iconv_open("ASCII", "ASCII");
  13   assert(cd != (iconv_t)-1);
  14
  15   char inbuf_[100];
  16   strcpy(inbuf_, "sample text");
  17   char outbuf_[100];
  18   char *inbuf = inbuf_;
  19   char *outbuf = outbuf_;
  20   size_t inbytesleft = strlen(inbuf_);
  21   size_t outbytesleft = sizeof(outbuf_);
  22
  23 #ifdef POSITIVE
  24   {
  25     char u;
  26     char *volatile p = &u;
  27     inbuf_[5] = *p;
  28   }
  29 #endif
  30
  31   size_t res;
  32   res = iconv(cd, 0, 0, 0, 0);
  33   assert(res != (size_t)-1);
  34
  35   res = iconv(cd, 0, 0, &outbuf, &outbytesleft);
  36   assert(res != (size_t)-1);
  37
  38   res = iconv(cd, &inbuf, &inbytesleft, &outbuf, &outbytesleft);
  39   // CHECK: MemorySanitizer: use-of-uninitialized-value
  40   // CHECK: #0 {{.*}} in main {{.*}}iconv.cc:[[@LINE-2]]
  41   assert(res != (size_t)-1);
  42   assert(inbytesleft == 0);
  43
  44   assert(memcmp(inbuf_, outbuf_, strlen(inbuf_)) == 0);
  45
  46   iconv_close(cd);
  47   return 0;
  48 }