LibNativeBridge: Add early init & env setup

Add a method to set up /proc/cpuinfo with enough privileges. Set
up the environment for an app in InitializeNativeBridge().

Turn on -Wall for libnativebridge.

(cherry picked from commit 962eb40abb68eb60077da158755b6a09c306aa41)
(cherry picked from commit ab0da5a9a6860046619629b8e6b83692d35dff86)
(cherry picked from commit 2f71cb24fa16c0388591918f1354d1f8608cc6e5)
(cherry picked from commit 04054e28e24866d76034236843490829b80df40c)
(cherry picked from commit 4390a632366ecf89af5f6c0fed39baf9aab2d0f1)

Bug: 17671501
Change-Id: Id4f4127d82737b5e56a77175e1068ff5cea60f9d

1 files changed, 48 insertions, 0 deletions

diff --git a/libnativebridge/tests/NeedsNativeBridge_test.cpp b/libnativebridge/tests/NeedsNativeBridge_test.cpp
new file mode 100644
index 0000000..e1c0876
--- /dev/null
+++ b/libnativebridge/tests/NeedsNativeBridge_test.cpp
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "NativeBridgeTest.h"
+
+namespace android {
+
+static const char* kISAs[] = { "arm", "arm64", "mips", "x86", "x86_64", "random", "64arm", "64_x86",
+                               "64_x86_64", "", "reallylongstringabcd", nullptr };
+
+#if defined(__arm__)
+static const char* kRuntimeISA = "arm";
+#elif defined(__aarch64__)
+static const char* kRuntimeISA = "arm64";
+#elif defined(__mips__)
+static const char* kRuntimeISA = "mips";
+#elif defined(__i386__)
+static const char* kRuntimeISA = "x86";
+#elif defined(__x86_64__)
+static const char* kRuntimeISA = "x86_64";
+#else
+static const char* kRuntimeISA = "unknown";
+#endif
+
+TEST_F(NativeBridgeTest, NeedsNativeBridge) {
+    EXPECT_EQ(false, NeedsNativeBridge(kRuntimeISA));
+
+    const size_t kISACount = sizeof(kISAs)/sizeof(kISAs[0]);
+    for (size_t i = 0; i < kISACount; i++) {
+        EXPECT_EQ(kISAs[i] == nullptr ? false : strcmp(kISAs[i], kRuntimeISA) != 0,
+                  NeedsNativeBridge(kISAs[i]));
+    }
+}
+
+}  // namespace android