compiler-rt/test/msan/Linux/sunrpc_bytes.cpp

   1 // REQUIRES: sunrpc
   2
   3 // RUN: %clangxx_msan -g -O0 %s -o %t && \
   4 // RUN:     %run %t 2>&1
   5 // RUN: %clangxx_msan -g -O0 -DUNINIT=1 %s -o %t && \
   6 // RUN:     not %run %t 2>&1 | FileCheck %s
   7
   8 #include <assert.h>
   9 #include <string.h>
  10 #include <rpc/xdr.h>
  11
  12 #include <sanitizer/msan_interface.h>
  13
  14 int main(int argc, char *argv[]) {
  15   XDR xdrs;
  16   char buf[100];
  17   xdrmem_create(&xdrs, buf, sizeof(buf), XDR_ENCODE);
  18   char s[20];
  19 #ifndef UNINIT
  20   strcpy(s, "hello");
  21 #endif
  22   char *sp = s;
  23   unsigned sz = 6;
  24   bool_t res = xdr_bytes(&xdrs, &sp, &sz, sizeof(s));
  25   // CHECK: MemorySanitizer: use-of-uninitialized-value
  26   // CHECK: {{in main.*sunrpc_bytes.cpp:}}[[@LINE-2]]
  27   assert(res == TRUE);
  28   xdr_destroy(&xdrs);
  29
  30   xdrmem_create(&xdrs, buf, sizeof(buf), XDR_DECODE);
  31   char s2[20];
  32   char *sp2 = s2;
  33   unsigned sz2;
  34   res = xdr_bytes(&xdrs, &sp2, &sz2, sizeof(s2));
  35   assert(res == TRUE);
  36   assert(sz == sz2);
  37   assert(strcmp(s, s2) == 0);
  38   xdr_destroy(&xdrs);
  39   return 0;
  40 }