<div dir="ltr">AsanCov emits file_name.PID so that you can run multiple processes with coverage (each spawning multiple subprocesses) and <div>they will not fight over the same file. An env. var. does not give us that. </div>
<div><br></div><div>--kcc </div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Thu, Feb 20, 2014 at 11:52 PM, Bob Wilson <span dir="ltr"><<a href="mailto:bob.wilson@apple.com" target="_blank">bob.wilson@apple.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Author: bwilson<br>
Date: Thu Feb 20 13:52:32 2014<br>
New Revision: 201808<br>
<br>
URL: <a href="http://llvm.org/viewvc/llvm-project?rev=201808&view=rev" target="_blank">http://llvm.org/viewvc/llvm-project?rev=201808&view=rev</a><br>
Log:<br>
Add an environment variable to override the default profile output file.<br>
<br>
Also rename the default output file from "pgo-data" to "default.profdata".<br>
The ".profdata" suffix is consistent with the name of the new llvm-profdata<br>
tool.<br>
<br>
Modified:<br>
    compiler-rt/trunk/lib/profile/PGOProfiling.c<br>
<br>
Modified: compiler-rt/trunk/lib/profile/PGOProfiling.c<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/profile/PGOProfiling.c?rev=201808&r1=201807&r2=201808&view=diff" target="_blank">http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/profile/PGOProfiling.c?rev=201808&r1=201807&r2=201808&view=diff</a><br>

==============================================================================<br>
--- compiler-rt/trunk/lib/profile/PGOProfiling.c (original)<br>
+++ compiler-rt/trunk/lib/profile/PGOProfiling.c Thu Feb 20 13:52:32 2014<br>
@@ -56,7 +56,10 @@ void llvm_pgo_register_writeout_function<br>
 }<br>
<br>
 void llvm_pgo_writeout_files() {<br>
-  OutputFile = fopen("pgo-data", "w");<br>
+  const char *OutputName = getenv("LLVM_PROFILE_FILE");<br>
+  if (OutputName == NULL || OutputName[0] == '\0')<br>
+    OutputName = "default.profdata";<br>
+  OutputFile = fopen(OutputName, "w");<br>
   if (!OutputFile) return;<br>
<br>
   while (writeout_fn_head) {<br>
<br>
<br>
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</blockquote></div><br></div>