From: Bill Wendling <isanbard@gmail.com>
Date: Fri, 25 May 2012 21:55:06 +0000 (+0000)
Subject: Open in read/write mode, creating the file if it doesn't exist.
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=e00c8fdcc150516ea55304000f28d468c75334aa;p=oota-llvm.git

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 2c373484bb3..32d19ad7742 100644
--- a/runtime/libprofile/GCDAProfiling.c
+++ b/runtime/libprofile/GCDAProfiling.c
@@ -110,14 +110,14 @@ void llvm_gcda_start_file(const char *orig_filename) {
   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;