Added irt extension support for supplying the nacl_irt_memory interface.

tests/irt_ext/mem_calls.h

+/*
+ * Copyright (c) 2014 The Native Client Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/*
+ * This module is intended to keep track of memory calls that have been hooked
+ * into a standard library. Because the IRT has a full implementation of
+ * all the memory related calls (mmap, munmap, mprotect...etc.) this module
+ * simply passes the actual functionality to the IRT.
+ */
+
+#ifndef NATIVE_CLIENT_TESTS_IRT_EXT_MEM_CALLS_H
+#define NATIVE_CLIENT_TESTS_IRT_EXT_MEM_CALLS_H
+
+struct mem_calls_environment {
+  int num_mmap_calls;
+  int num_munmap_calls;
+  int num_mprotect_calls;
+};
+
+void init_mem_calls_module(void);
+
+void init_mem_calls_environment(struct mem_calls_environment *env);
+
+void activate_mem_calls_env(struct mem_calls_environment *env);
+void deactivate_mem_calls_env(void);
+
+#endif /* NATIVE_CLIENT_TESTS_IRT_EXT_MEM_CALLS_H */