sm6250-common: init: override dalvik heap config based on total RAM

BoardConfigCommon.mk

@@ -80,6 +80,10 @@ BOARD_KERNEL_CMDLINE += video=vfb:640x400,bpp=32,memsize=3072000
 DEVICE_MANIFEST_FILE := $(COMMON_PATH)/manifest.xml
 DEVICE_MATRIX_FILE := $(COMMON_PATH)/compatibility_matrix.xml
 
+# Init
+TARGET_INIT_VENDOR_LIB := //$(COMMON_PATH):libinit_xiaomi_sm6250
+TARGET_RECOVERY_DEVICE_MODULES := libinit_xiaomi_sm6250
+
 # Partitions
 BOARD_BOOTIMAGE_PARTITION_SIZE := 134217728
 BOARD_CACHEIMAGE_PARTITION_SIZE := 402653184

init/Android.bp

+//
+// Copyright (C) 2020 The LineageOS 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.
+//
+
+cc_library_static {
+    name: "libinit_xiaomi_sm6250",
+    recovery_available: true,
+    srcs: [
+        "init.cpp"
+    ],
+    include_dirs: [
+        "system/core/base/include",
+        "system/core/init"
+    ]
+}

init/init.cpp

+/*
+ * Copyright (C) 2020 The LineageOS 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 <cstdlib>
+#include <fstream>
+#include <string.h>
+#include <sys/sysinfo.h>
+#include <unistd.h>
+
+#include <android-base/properties.h>
+#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
+#include <sys/_system_properties.h>
+
+#include "vendor_init.h"
+#include "property_service.h"
+
+using android::base::GetProperty;
+using android::init::property_set;
+
+char const *heapstartsize;
+char const *heapgrowthlimit;
+char const *heapsize;
+char const *heapminfree;
+char const *heapmaxfree;
+char const *heaptargetutilization;
+
+void check_device()
+{
+    struct sysinfo sys;
+
+    sysinfo(&sys);
+
+    if (sys.totalram >= 5ull * 1024 * 1024 * 1024) {
+        // from - phone-xhdpi-6144-dalvik-heap.mk
+        heapstartsize = "16m";
+        heapgrowthlimit = "256m";
+        heapsize = "512m";
+        heaptargetutilization = "0.5";
+        heapminfree = "8m";
+        heapmaxfree = "32m";
+    } else if (sys.totalram >= 3ull * 1024 * 1024 * 1024) {
+        // from - phone-xhdpi-4096-dalvik-heap.mk
+        heapstartsize = "8m";
+        heapgrowthlimit = "192m";
+        heapsize = "512m";
+        heaptargetutilization = "0.6";
+        heapminfree = "8m";
+        heapmaxfree = "16m";
+    }
+}
+
+void vendor_load_properties()
+{
+    check_device();
+
+    property_set("dalvik.vm.heapstartsize", heapstartsize);
+    property_set("dalvik.vm.heapgrowthlimit", heapgrowthlimit);
+    property_set("dalvik.vm.heapsize", heapsize);
+    property_set("dalvik.vm.heaptargetutilization", heaptargetutilization);
+    property_set("dalvik.vm.heapminfree", heapminfree);
+    property_set("dalvik.vm.heapmaxfree", heapmaxfree);
+}