x86_64: Align uint64_t/int64_t structure member to 8 bytes

To make sure the stature which pass between 32/64bit process have
same memory layout for 32/64bit.

Signed-off-by: Fengwei Yin <fengwei.yin@intel.com>
Co-Authored-by: Narayan Kamath <narayan@google.com> (Unit test only.)
Change-Id: I1bc2d12cce41ec0bc484adcaf968f274bec75c12

2 files changed, 78 insertions, 0 deletions

diff --git a/libs/input/tests/Android.mk b/libs/input/tests/Android.mk
index c62dff1..9612a65 100644
--- a/libs/input/tests/Android.mk
+++ b/libs/input/tests/Android.mk
@@ -29,5 +29,16 @@ $(foreach file,$(test_src_files), \
     $(eval include $(BUILD_NATIVE_TEST)) \
 )
 
+# NOTE: This is a compile time test, and does not need to be
+# run. All assertions are static_asserts and will fail during
+# buildtime if something's wrong.
+include $(CLEAR_VARS)
+LOCAL_SRC_FILES := StructLayout_test.cpp
+LOCAL_MODULE := StructLayout_test
+LOCAL_CFLAGS := -std=c++11 -O0
+LOCAL_MULTILIB := both
+include $(BUILD_STATIC_LIBRARY)
+
+
 # Build the manual test programs.
 include $(call all-makefiles-under, $(LOCAL_PATH))
diff --git a/libs/input/tests/StructLayout_test.cpp b/libs/input/tests/StructLayout_test.cpp
new file mode 100644
index 0000000..83bc6ae
--- /dev/null
+++ b/libs/input/tests/StructLayout_test.cpp
@@ -0,0 +1,67 @@
+/*
+ * 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 <input/InputTransport.h>
+#include <input/Input.h>
+
+namespace android {
+
+#define CHECK_OFFSET(type, member, expected_offset) \
+  static_assert((offsetof(type, member) == expected_offset), "")
+
+struct Foo {
+  uint32_t dummy;
+  PointerCoords coords;
+};
+
+void TestPointerCoordsAlignment() {
+  CHECK_OFFSET(Foo, coords, 8);
+}
+
+void TestInputMessageAlignment() {
+  CHECK_OFFSET(InputMessage, body, 8);
+
+  CHECK_OFFSET(InputMessage::Body::Key, seq, 0);
+  CHECK_OFFSET(InputMessage::Body::Key, eventTime, 8);
+  CHECK_OFFSET(InputMessage::Body::Key, deviceId, 16);
+  CHECK_OFFSET(InputMessage::Body::Key, source, 20);
+  CHECK_OFFSET(InputMessage::Body::Key, action, 24);
+  CHECK_OFFSET(InputMessage::Body::Key, flags, 28);
+  CHECK_OFFSET(InputMessage::Body::Key, keyCode, 32);
+  CHECK_OFFSET(InputMessage::Body::Key, scanCode, 36);
+  CHECK_OFFSET(InputMessage::Body::Key, metaState, 40);
+  CHECK_OFFSET(InputMessage::Body::Key, repeatCount, 44);
+  CHECK_OFFSET(InputMessage::Body::Key, downTime, 48);
+
+  CHECK_OFFSET(InputMessage::Body::Motion, seq, 0);
+  CHECK_OFFSET(InputMessage::Body::Motion, eventTime, 8);
+  CHECK_OFFSET(InputMessage::Body::Motion, deviceId, 16);
+  CHECK_OFFSET(InputMessage::Body::Motion, source, 20);
+  CHECK_OFFSET(InputMessage::Body::Motion, action, 24);
+  CHECK_OFFSET(InputMessage::Body::Motion, flags, 28);
+  CHECK_OFFSET(InputMessage::Body::Motion, metaState, 32);
+  CHECK_OFFSET(InputMessage::Body::Motion, buttonState, 36);
+  CHECK_OFFSET(InputMessage::Body::Motion, edgeFlags, 40);
+  CHECK_OFFSET(InputMessage::Body::Motion, downTime, 48);
+  CHECK_OFFSET(InputMessage::Body::Motion, xOffset, 56);
+  CHECK_OFFSET(InputMessage::Body::Motion, yOffset, 60);
+  CHECK_OFFSET(InputMessage::Body::Motion, xPrecision, 64);
+  CHECK_OFFSET(InputMessage::Body::Motion, yPrecision, 68);
+  CHECK_OFFSET(InputMessage::Body::Motion, pointerCount, 72);
+  CHECK_OFFSET(InputMessage::Body::Motion, pointers, 80);
+}
+
+} // namespace android