Handle suppression files ending in CRLF (\r\n)

The gnuwin32 version of 'echo' appears to produce such files, causing a
test failure that only reproduced with gnuwin32.

llvm-svn: 246096

compiler-rt/lib/sanitizer_common/sanitizer_suppressions.cc

@@ -112,7 +112,8 @@ void SuppressionContext::Parse(const char *str) {
       end = line + internal_strlen(line);
     if (line != end && line[0] != '#') {
       const char *end2 = end;
-      while (line != end2 && (end2[-1] == ' ' || end2[-1] == '\t'))
+      while (line != end2 &&
+             (end2[-1] == ' ' || end2[-1] == '\t' || end2[-1] == '\r'))
         end2--;
       int type;
       for (type = 0; type < suppression_types_num_; type++) {

compiler-rt/test/asan/TestCases/Windows/suppressions-crlf.cc

@@ -0,0 +1,19 @@
+// Try a strlen suppression, but force the input file to be DOS format (CRLF).
+// RUN: %clangxx_asan -O0 %s -o %t
+// RUN: echo "interceptor_name:strlen" > %t.supp
+// RUN: unix2dos %t.supp
+// RUN: %env_asan_opts=suppressions='"%t.supp"' %run %t 2>&1 | FileCheck %s
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int main() {
+  char *a = (char *)malloc(6);
+  free(a);
+  size_t len = strlen(a); // BOOM
+  fprintf(stderr, "strlen ignored, len = %zu\n", len);
+}
+
+// CHECK-NOT: AddressSanitizer: heap-use-after-free
+// CHECK: strlen ignored