[Asan][Msan] Unit tests Disable some tests for FreeBSD

test/asan/TestCases/Posix/asan-sigbus.cpp

 // Check handle_bus flag
 // Defaults to true
 // RUN: %clangxx_asan -std=c++11 %s -o %t
 // RUN: not %run %t 2>&1 | FileCheck %s -check-prefix=CHECK-BUS
 // RUN: %env_asan_opts=handle_sigbus=0 not --crash %run %t 2>&1 | FileCheck %s
 
 // UNSUPPORTED: ios
+// Instead of getting a SIGBUS error, we get a SIGSEGV
+// XFAIL: freebsd
 
 #include <assert.h>
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/mman.h>
 #include <unistd.h>
 #include <string>

test/asan/TestCases/Posix/fread_fwrite.cc

 // RUN: %clangxx_asan -g %s -o %t
 // RUN: not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-FWRITE
 // RUN: not %run %t 1 2>&1 | FileCheck %s --check-prefix=CHECK-FREAD
+//
+// On FreeBSD stack overflow error instead
+// XFAIL: freebsd
 
 #include <stdio.h>
 #include <stdlib.h>
 
 int test_fread() {
   FILE *f = fopen("/dev/zero", "r");
   char buf[2];
   fread(buf, sizeof(buf), 2, f); // BOOM

test/asan/TestCases/Posix/stack-use-after-return.cc

 //
 // Test the max_uar_stack_size_log/min_uar_stack_size_log flag.
 //
 // RUN: %env_asan_opts=detect_stack_use_after_return=1:max_uar_stack_size_log=20:verbosity=1 not %run %t 2>&1 | FileCheck --check-prefix=CHECK-20 %s
 // RUN: %env_asan_opts=detect_stack_use_after_return=1:min_uar_stack_size_log=24:max_uar_stack_size_log=24:verbosity=1 not %run %t 2>&1 | FileCheck --check-prefix=CHECK-24 %s
 
 // This test runs out of stack on AArch64.
 // UNSUPPORTED: aarch64
+// stack size log lower than expected
+// XFAIL: freebsd
 
 // FIXME: Fix this test for dynamic runtime on arm linux.
 // UNSUPPORTED: (arm-linux || armhf-linux) && asan-dynamic-runtime
 
 #include <limits.h>
 #include <pthread.h>
 #include <stdio.h>
 #include <stdlib.h>
if (kStackSize > 0) {
     ret = pthread_attr_getstacksize(&attr, &stacksize_check);
     if (ret != 0) {
       fprintf(stderr, "pthread_attr_getstacksize returned %d\n", ret);
       abort();
     }
 
     if (stacksize_check != desired_stack_size) {
       fprintf(stderr, "Unable to set stack size to %d, the stack size is %d.\n",
-              desired_stack_size, stacksize_check);
+              (int)desired_stack_size, (int)stacksize_check);
       abort(); 
     }
   }
   pthread_t t;
   pthread_create(&t, &attr, Thread, 0);
   pthread_attr_destroy(&attr);
   pthread_join(t, 0);
 #else
   Func2(Func1());
 #endif
   return 0;
 }

test/msan/dtls_test.c

 /* RUN: %clang_msan -g %s -o %t
    RUN: %clang_msan -g %s -DBUILD_SO -fPIC -o %t-so.so -shared
    RUN: %run %t 2>&1
 
    Regression test for a bug in msan/glibc integration,
    see https://sourceware.org/bugzilla/show_bug.cgi?id=16291
    and https://github.com/google/sanitizers/issues/547
 
-   XFAIL: freebsd
+   XFAIL: FreeBSD
    UNSUPPORTED: powerpc
 */
 
 #ifndef BUILD_SO
 #include <assert.h>
 #include <dlfcn.h>
 #include <stdio.h>
 #include <stdlib.h>