From 96e0cfa721925550b1cc39cdfd6084a878e6ffe2 Mon Sep 17 00:00:00 2001
From: Dmitriy Ivanov <dimitry@google.com>
Date: Tue, 7 Oct 2014 13:34:42 -0700
Subject: Link sigchain to main executable

 Also export necessary symbols to preempt calls from
 libart.so

Bug: 15345057
Bug: 15426766
Change-Id: If0b7f59a59824e30aa0c33dad76c7a44932180de
---
 cmds/app_process/Android.mk         | 17 +++++++++++++++--
 cmds/app_process/sigchain_proxy.cpp | 17 +++++++++++++++++
 2 files changed, 32 insertions(+), 2 deletions(-)
 create mode 100644 cmds/app_process/sigchain_proxy.cpp

diff --git a/cmds/app_process/Android.mk b/cmds/app_process/Android.mk
index 74a2f7b..1ca14a6 100644
--- a/cmds/app_process/Android.mk
+++ b/cmds/app_process/Android.mk
@@ -2,10 +2,18 @@ LOCAL_PATH:= $(call my-dir)
 
 include $(CLEAR_VARS)
 
+# TODO: Trying to link libsigchain as a static library prevents
+# static linker from exporting necessary symbols. So as a workaround
+# we use sigchain.o
 LOCAL_SRC_FILES:= \
-	app_main.cpp
+	app_main.cpp \
+	sigchain_proxy.cpp
+
+LOCAL_LDFLAGS := -Wl,--version-script,art/sigchainlib/version-script.txt -Wl,--export-dynamic
+LOCAL_CPPFLAGS := -std=c++11 -Iart
 
 LOCAL_SHARED_LIBRARIES := \
+	libdl \
 	libcutils \
 	libutils \
 	liblog \
@@ -28,8 +36,10 @@ ifeq ($(TARGET_ARCH),arm)
 
 include $(CLEAR_VARS)
 
+# see comment above (~l5)
 LOCAL_SRC_FILES:= \
-	app_main.cpp
+	app_main.cpp \
+	sigchain_proxy.cpp
 
 LOCAL_SHARED_LIBRARIES := \
 	libcutils \
@@ -38,6 +48,9 @@ LOCAL_SHARED_LIBRARIES := \
 	libbinder \
 	libandroid_runtime
 
+LOCAL_LDFLAGS := -ldl -Wl,--version-script,art/sigchainlib/version-script.txt -Wl,--export-dynamic
+LOCAL_CPPFLAGS := -std=c++11 -Iart
+
 LOCAL_MODULE := app_process__asan
 LOCAL_MODULE_TAGS := eng
 LOCAL_MODULE_PATH := $(TARGET_OUT_EXECUTABLES)/asan
diff --git a/cmds/app_process/sigchain_proxy.cpp b/cmds/app_process/sigchain_proxy.cpp
new file mode 100644
index 0000000..bb7a678
--- /dev/null
+++ b/cmds/app_process/sigchain_proxy.cpp
@@ -0,0 +1,17 @@
+/*
+ * 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 "sigchainlib/sigchain.cc"
-- 
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