libs/libc: move the backtrace implement to sched

1. move the backtrace implement to sched
2. rename CONFIG_UNWINDER to CONFIG_SCHED_BACKTRACE

Signed-off-by: chao.an <anchao@xiaomi.com>

include/execinfo.h

@@ -34,7 +34,7 @@ extern "C"
 #define EXTERN extern
 #endif
 
-#if defined(CONFIG_UNWINDER)
+#if defined(CONFIG_SCHED_BACKTRACE)
 
 /* Store up to SIZE return address of the current program state in
  * ARRAY and return the exact number of values stored.

libs/libc/Kconfig

@@ -29,4 +29,3 @@ source "libs/libc/wqueue/Kconfig"
 source "libs/libc/hex2bin/Kconfig"
 source "libs/libc/userfs/Kconfig"
 source "libs/libc/builtin/Kconfig"
-source "libs/libc/debug/Kconfig"

libs/libc/Makefile

@@ -25,7 +25,6 @@ include assert/Make.defs
 include audio/Make.defs
 include builtin/Make.defs
 include ctype/Make.defs
-include debug/Make.defs
 include dirent/Make.defs
 include dlfcn/Make.defs
 include endian/Make.defs

libs/libc/debug/Kconfig

@@ -1,22 +0,0 @@
-#
-# For a description of the syntax of this configuration file,
-# see the file kconfig-language.txt in the NuttX tools repository.
-#
-
-# These are library functions that may be overridden by architecture-
-# specific implementations.  Not all architectures support implementations
-# for every library function.
-
-menu "Library Debugging"
-
-config UNWINDER
-	bool "Stack Unwinder"
-	default "n"
-	---help---
-		This option enables stack unwinding support in NuttX
-		using the information automatically generated by the
-		compiler. The resulting image is slightly bigger but
-		the performance is not affected. Currently, this feature
-		only works with EABI compilers.
-
-endmenu # Library Debugging Support

libs/libc/debug/Make.defs

@@ -1,30 +0,0 @@
-############################################################################
-# libs/libc/debug/Make.defs
-#
-# Licensed to the Apache Software Foundation (ASF) under one or more
-# contributor license agreements.  See the NOTICE file distributed with
-# this work for additional information regarding copyright ownership.  The
-# ASF licenses this file to you 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.
-#
-############################################################################
-
-ifeq ($(CONFIG_UNWINDER),y)
-
-CSRCS += lib_backtrace.c lib_dumpstack.c
-
-endif
-
-# Include debug build support
-
-DEPPATH += --dep-path debug
-VPATH += :debug

libs/libc/sched/Make.defs

@@ -34,6 +34,10 @@ ifneq ($(CONFIG_BUILD_KERNEL),y)
 CSRCS += task_startup.c
 endif
 
+ifeq ($(CONFIG_SCHED_BACKTRACE),y)
+CSRCS += lib_dumpstack.c lib_backtrace.c
+endif
+
 # Add the sched directory to the build
 
 DEPPATH += --dep-path sched

libs/libc/sched/sched_backtrace.c

@@ -1,5 +1,5 @@
 /****************************************************************************
- * libs/libc/debug/lib_backtrace.c
+ * libs/libc/sched/sched_backtrace.c
  *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with

libs/libc/sched/sched_dumpstack.c

@@ -1,5 +1,5 @@
 /****************************************************************************
- * libs/libc/debug/lib_dumpstack.c
+ * libs/libc/sched/sched_dumpstack.c
  *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with

sched/Kconfig

@@ -1822,3 +1822,12 @@ config PTHREAD_STACK_DEFAULT
 		Default pthread stack size
 
 endmenu # Stack and heap information
+
+config SCHED_BACKTRACE
+	bool "Stack BackTrace"
+	default "n"
+	---help---
+		This option enables stack backtrace support in the NuttX
+		using the information automatically generated by the
+		compiler or architecture specific approach when ARCH_HAVE_BACKTRACE
+		is selected