src/compiler-rt/test/msan/Linux/sunrpc_bytes.cc

   1 // RUN: %clangxx_msan -g -O0 %s -o %t && \
   2 // RUN:     %run %t 2>&1
   3 // RUN: %clangxx_msan -g -O0 -DUNINIT=1 %s -o %t && \
   4 // RUN:     not %run %t 2>&1 | FileCheck %s
   5
   6 #include <assert.h>
   7 #include <string.h>
   8 #include <rpc/xdr.h>
   9
  10 #include <sanitizer/msan_interface.h>
  11
  12 int main(int argc, char *argv[]) {
  13   XDR xdrs;
  14   char buf[100];
  15   xdrmem_create(&xdrs, buf, sizeof(buf), XDR_ENCODE);
  16   char s[20];
  17 #ifndef UNINIT
  18   strcpy(s, "hello");
  19 #endif
  20   char *sp = s;
  21   unsigned sz = 6;
  22   bool_t res = xdr_bytes(&xdrs, &sp, &sz, sizeof(s));
  23   // CHECK: MemorySanitizer: use-of-uninitialized-value
  24   // CHECK: {{in main.*sunrpc_bytes.cc:}}[[@LINE-2]]
  25   assert(res == TRUE);
  26   xdr_destroy(&xdrs);
  27
  28   xdrmem_create(&xdrs, buf, sizeof(buf), XDR_DECODE);
  29   char s2[20];
  30   char *sp2 = s2;
  31   unsigned sz2;
  32   res = xdr_bytes(&xdrs, &sp2, &sz2, sizeof(s2));
  33   assert(res == TRUE);
  34   assert(sz == sz2);
  35   assert(strcmp(s, s2) == 0);
  36   xdr_destroy(&xdrs);
  37   return 0;
  38 }