[Openmp-commits] [PATCH] D48282: [OMPT] Use alloca() to force availability of frame pointer

Simon Convent via Phabricator via Openmp-commits openmp-commits at lists.llvm.org
Mon Jun 25 02:06:27 PDT 2018

sconvent updated this revision to Diff 152640.
sconvent added a comment.

Add comment explaining the use of alloca()



Index: runtime/test/ompt/misc/interoperability.cpp
--- runtime/test/ompt/misc/interoperability.cpp
+++ runtime/test/ompt/misc/interoperability.cpp
@@ -3,6 +3,7 @@
 #include <iostream>
 #include <thread>
+#include <alloca.h>
 #include "callback.h"
 #include "omp.h"
@@ -15,6 +16,9 @@
   // runtime isn't initialized yet...)
+  // Call alloca() to force availability of frame pointer
+  void *p = alloca(0);
   // Wait for both initial threads to arrive that will eventually become the
   // master threads in the following parallel region.

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