From cbb70ce070d220642b038ea101d9c0f9fbf860d6 Mon Sep 17 00:00:00 2001
From: dim <dim@FreeBSD.org>
Date: Sun, 20 Feb 2011 12:57:14 +0000
Subject: Vendor import of llvm trunk r126079:
 http://llvm.org/svn/llvm-project/llvm/trunk@126079

---
 lib/Support/Valgrind.cpp | 54 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 lib/Support/Valgrind.cpp

(limited to 'lib/Support/Valgrind.cpp')

diff --git a/lib/Support/Valgrind.cpp b/lib/Support/Valgrind.cpp
new file mode 100644
index 0000000..7034485
--- /dev/null
+++ b/lib/Support/Valgrind.cpp
@@ -0,0 +1,54 @@
+//===-- Valgrind.cpp - Implement Valgrind communication ---------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//  Defines Valgrind communication methods, if HAVE_VALGRIND_VALGRIND_H is
+//  defined.  If we have valgrind.h but valgrind isn't running, its macros are
+//  no-ops.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Support/Valgrind.h"
+#include "llvm/Config/config.h"
+
+#if HAVE_VALGRIND_VALGRIND_H
+#include <valgrind/valgrind.h>
+
+static bool InitNotUnderValgrind() {
+  return !RUNNING_ON_VALGRIND;
+}
+
+// This bool is negated from what we'd expect because code may run before it
+// gets initialized.  If that happens, it will appear to be 0 (false), and we
+// want that to cause the rest of the code in this file to run the
+// Valgrind-provided macros.
+static const bool NotUnderValgrind = InitNotUnderValgrind();
+
+bool llvm::sys::RunningOnValgrind() {
+  if (NotUnderValgrind)
+    return false;
+  return RUNNING_ON_VALGRIND;
+}
+
+void llvm::sys::ValgrindDiscardTranslations(const void *Addr, size_t Len) {
+  if (NotUnderValgrind)
+    return;
+
+  VALGRIND_DISCARD_TRANSLATIONS(Addr, Len);
+}
+
+#else  // !HAVE_VALGRIND_VALGRIND_H
+
+bool llvm::sys::RunningOnValgrind() {
+  return false;
+}
+
+void llvm::sys::ValgrindDiscardTranslations(const void *Addr, size_t Len) {
+}
+
+#endif  // !HAVE_VALGRIND_VALGRIND_H
-- 
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