Open in read/write mode, creating the file if it doesn't exist.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157501 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/runtime/libprofile/GCDAProfiling.c b/runtime/libprofile/GCDAProfiling.c
index 2c37348..32d19ad 100644
--- a/runtime/libprofile/GCDAProfiling.c
+++ b/runtime/libprofile/GCDAProfiling.c
@@ -110,14 +110,14 @@
char *filename;
filename = mangle_filename(orig_filename);
recursive_mkdir(filename);
- output_file = fopen(filename, "wb");
+ output_file = fopen(filename, "w+b");
if (!output_file) {
const char *cptr = strrchr(orig_filename, '/');
- output_file = fopen(cptr ? cptr + 1 : orig_filename, "wb");
+ output_file = fopen(cptr ? cptr + 1 : orig_filename, "w+b");
if (!output_file) {
- fprintf(stderr, "LLVM profiling runtime: while opening '%s': ",
+ fprintf(stderr, "LLVM profiling runtime: cannot open '%s': ",
cptr ? cptr + 1 : orig_filename);
perror("");
return;