fix: 修复samgr_lite栈溢出的问题

共享task的内存默认为0x800，当任务函数调用层次较为复杂的时候，就会出现栈溢出的
问题，增加栈大小可配置参数，根据不同的情况进行栈大小调节

Signed-off-by: SimonLi <likailong@huawei.com>

config.gni

@@ -0,0 +1,18 @@
+# Copyright (c) 2020 Huawei Device Co., Ltd.
+# 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.
+
+declare_args() {
+  # configuration for samgr_lite created shared task's stack size.
+  # 0 means using system default thread stack size, other positive values will be accepted.
+  config_ohos_distributedschedule_samgr_lite_shared_task_size = 2048
+}

samgr/BUILD.gn

@@ -10,8 +10,18 @@
 # 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.
+
+import("../config.gni")
+
+defines = []
+
+if (defined(config_ohos_distributedschedule_samgr_lite_shared_task_size) &&
+    config_ohos_distributedschedule_samgr_lite_shared_task_size > 0) {
+  defines += [ "SHARED_TASK_STACK_SIZE=$config_ohos_distributedschedule_samgr_lite_shared_task_size" ]
+}
+
 config("external_settings_shared") {
-  defines = [ "LAYER_INIT_SHARED_LIB" ]
+  defines += [ "LAYER_INIT_SHARED_LIB" ]
 }
 
 config("samgr_public") {

samgr/source/samgr_lite.c

@@ -441,7 +441,8 @@ static void AddTaskPool(ServiceImpl *service, TaskConfig *cfg, const char *name)
             int pos = (int)cfg->priority / PROPERTY_STEP;
             SamgrLiteImpl *samgr = GetImplement();
             if (samgr->sharedPool[pos] == NULL) {
-                TaskConfig shareCfg = DEFAULT_TASK_CFG(pos);
+                TaskConfig shareCfg = {LEVEL_HIGH, (int16) ((pos) * PROPERTY_STEP + 1),
+                                       SHARED_TASK_STACK_SIZE, 25, SHARED_TASK};
                 samgr->sharedPool[pos] = SAMGR_CreateFixedTaskPool(&shareCfg, name, DEFAULT_SIZE);
             }
             service->taskPool = samgr->sharedPool[pos];

samgr/source/samgr_lite_inner.h

@@ -31,7 +31,6 @@ extern "C" {
 #define SINGLE_SIZE 1
 #define MAX_POOL_NUM 8
 #define PROPERTY_STEP 8
-#define DEFAULT_TASK_CFG(pos) {LEVEL_HIGH,  (int16) ((pos) * PROPERTY_STEP + 1), 0x800, 25, SHARED_TASK}
 #define WDG_SAMGR_INIT_TIME 1000
 #define WDG_SVC_REG_TIME 5000
 #define WDG_SVC_BOOT_TIME 5000