From bdfdbfbbac4a0f47d8b789167697d6dd70a39720 Mon Sep 17 00:00:00 2001
From: Alon Zakai <azakai@google.com>
Date: Fri, 10 May 2019 09:08:28 -0700
Subject: Emit process ID in the filenames of byn* tempfiles (#1916)

Helps to avoid trampling each other when binaryen is called multiple times from emcc, for example.
---
 src/passes/pass.cpp | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

(limited to 'src/passes/pass.cpp')

diff --git a/src/passes/pass.cpp b/src/passes/pass.cpp
index eb49072ba..287dd1cf9 100644
--- a/src/passes/pass.cpp
+++ b/src/passes/pass.cpp
@@ -17,6 +17,10 @@
 #include <chrono>
 #include <sstream>
 
+#ifdef __linux__
+#include <unistd.h>
+#endif
+
 #include "ir/hashed.h"
 #include "ir/module-utils.h"
 #include "pass.h"
@@ -415,7 +419,12 @@ static void dumpWast(Name name, Module* wasm) {
   while (numstr.size() < 3) {
     numstr = '0' + numstr;
   }
-  auto fullName = std::string("byn-") + numstr + "-" + name.str + ".wasm";
+  auto fullName = std::string("byn-");
+#ifdef __linux__
+  // TODO: use _getpid() on windows, elsewhere?
+  fullName += std::to_string(getpid()) + '-';
+#endif
+  fullName += numstr + "-" + name.str + ".wasm";
   Colors::disable();
   ModuleWriter writer;
   writer.setBinary(false); // TODO: add an option for binary
-- 
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