os/kernel/crashlog_writer: Add crash log flash save

lib/libc/stdio/lib_lowoutstream.c

@@ -65,6 +65,9 @@
 
 #include "lib_internal.h"
 
+#ifdef CONFIG_CRASH_LOG_SAVE
+#include <tinyara/crashlog_writer/crashlog_writer.h>>
+#endif
 /****************************************************************************
  * Private Functions
  ****************************************************************************/
@@ -76,6 +79,11 @@
 static void lowoutstream_putc(FAR struct lib_outstream_s *this, int ch)
 {
 	DEBUGASSERT(this);
+#ifdef __KERNEL__
+#ifdef CONFIG_CRASH_LOG_SAVE
+	crash_log_to_buffer(ch);
+#endif
+#endif
 #if defined(CONFIG_BUILD_FLAT) || (defined(CONFIG_BUILD_PROTECTED) && defined(__KERNEL__))
 	if (up_putc(ch) != EOF) {
 		this->nput++;

os/Kconfig

@@ -625,6 +625,10 @@ menu "Binary manager"
 source kernel/binary_manager/Kconfig
 endmenu
 
+menu "Crash log saving"
+source kernel/crashlog_writer/Kconfig
+endmenu
+
 menu "Task Monitor"
 source kernel/task_monitor/Kconfig
 endmenu

os/arch/arm/src/armv7-a/arm_assert.c

@@ -105,6 +105,9 @@
 #include "irq/irq.h"
 #include "task/task.h"
 #include "up_internal.h"
+#ifdef CONFIG_CRASH_LOG_SAVE
+#include <tinyara/crashlog_writer/crashlog_writer.h>>
+#endif
 
 bool abort_mode = false;
 
@@ -580,6 +583,7 @@ static inline void print_assert_detail(const uint8_t *filename, int lineno, stru
 
 void up_assert(const uint8_t *filename, int lineno)
 {
+
 	/* ARCH_GET_RET_ADDRESS should always be
 	 * called at the start of the function */
 
@@ -610,7 +614,14 @@ void up_assert(const uint8_t *filename, int lineno)
 	} else {
 		asserted_location = kernel_assert_location;
 	}
-
+#ifdef CONFIG_CRASH_LOG_SAVE
+#ifdef CONFIG_BINMGR_RECOVERY
+	if (IS_FAULT_IN_USER_SPACE(asserted_location)) {
+		/* start assert log saving */
+		set_store_to_buffer_flag(1);
+	}
+#endif
+#endif
 #ifdef CONFIG_SMP
 	/* Pause all other CPUs to avoid mix up of logs while printing assert logs */
 	up_cpu_pause_all();
@@ -654,6 +665,7 @@ void up_assert(const uint8_t *filename, int lineno)
 	if (IS_FAULT_IN_USER_SPACE(asserted_location)) {
 		/* Recover user fault through binary manager */
 		binary_manager_recover_userfault();
+		state = NORMAL_STATE; 
 	} else
 #endif
 	{

os/include/tinyara/crashlog_writer/crashlog_writer.h

@@ -0,0 +1,57 @@
+/****************************************************************************
+ *
+ * Copyright 2022 Samsung Electronics All Rights Reserved.
+ *
+ * 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.
+ *
+ ****************************************************************************/
+
+#ifndef __CRASH_LOG_H
+#define __CRASH_LOG_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+/****************************************************************************
+ * Description:
+ *   This is used to store logs that are output via lldbg() during a user crash situation into a buffer.
+ *
+ ****************************************************************************/
+void crash_log_to_buffer(char ch);
+
+/****************************************************************************
+ * Description:
+ *   If the flag is set to 1, crash logs start being stored in the buffer; if
+ * it is set to 0, the storage stops.
+ *
+ ****************************************************************************/
+void set_store_to_buffer_flag(int flag); 
+
+/****************************************************************************
+ * Description: 
+ *   Saves the crash log to a file. 
+ *   If the flag is 1, the log is saved in compressed form; if it is 0, it is saved uncompressed.
+ *
+ ****************************************************************************/
+char* save_crash_log(int flag);
+
+/*************************************************************************************
+* Name: read_crash_log
+*
+* Description: 
+* 	Reads a log from a file and stores it in a buffer. If the log is compresed, it is
+*	decompressed before being stored.
+*************************************************************************************/
+int read_crash_log(char *filename, char *buf, int buf_size);
+
+#endif

os/kernel/Makefile

@@ -79,6 +79,7 @@ include debug/Make.defs
 include preference/Make.defs
 include task_monitor/Make.defs
 include log_dump/Make.defs
+include crashlog_writer/Make.defs
 include silent_reboot/Make.defs
 
 AOBJS = $(ASRCS:.S=$(OBJEXT))

os/kernel/binary_manager/binary_manager_recovery.c

@@ -42,6 +42,10 @@
 #include "semaphore/semaphore.h"
 #include "binary_manager_internal.h"
 
+#ifdef CONFIG_CRASH_LOG_SAVE
+#include <tinyara/crashlog_writer/crashlog_writer.h>
+#endif
+
 /****************************************************************************
  * Pre-processor Definitions
  ****************************************************************************/
@@ -345,6 +349,17 @@ void binary_manager_recovery(int bin_idx)
 		bmlldbg("Failed to deactivate binary, bin idx %d\n", bin_idx);
 		goto reboot_board;
 	}
+#endif
+#ifdef CONFIG_CRASH_LOG_SAVE
+	set_store_to_buffer_flag(0); //stop saving log to buf
+#ifdef CONFIG_COMPRESSION_FLAG
+	save_crash_log(1);
+#else
+	save_crash_log(0);
+#endif
+#ifdef CONFIG_REBOOT_AFTER_LOG_SAVE
+	binary_manager_reset_board(REBOOT_SYSTEM_BINARY_RECOVERYFAIL);
+#endif
 #endif
 	/* Create loader to reload binary */
 	ret = binary_manager_execute_loader(LOADCMD_RELOAD, bin_idx);

os/kernel/crashlog_writer/Kconfig

@@ -0,0 +1,64 @@
+#
+# For a description of the syntax of this configuration file,
+# see kconfig-language at https://www.kernel.org/doc/Documentation/kbuild/kconfig-language.txt
+#
+
+
+config CRASH_LOG_SAVE
+	bool "enable crash log saving"
+	default n
+    depends on BINMGR_RECOVERY
+	---help---
+        This saves the crash log.
+
+if CRASH_LOG_SAVE
+
+config COMPRESSION_FLAG
+    bool "COMPRESSION_FLAG"
+    default y
+    ---help---
+        Controls whether compression is applied.
+        if the value is 0 compression is not performed.
+
+
+config CRASH_LOG_BUF_SIZE
+    int "CRASH_LOG_BUF_SIZE"
+    default 8192
+    ---help---
+        Determines the size of the buffer where crash logs will be stored.
+        The crash log is stored in the data section.
+
+config REBOOT_AFTER_LOG_SAVE
+    bool "REBOOT_AFTER_SAVING_LOG"
+    default n
+    ---help---
+        Determines whether to reboot after saving the crash log.
+
+config MAX_DIGITS
+    int "MAX_DIGITS"
+    default 5
+    range 1 8
+    ---help---
+        Specify the number of digits to use in the file name suffix.
+
+config MAX_FILES
+    int "MAX_FILES"
+    default 5
+    ---help---
+        Determine the maximum number of crash log files to be stored.
+
+config CRASH_LOG_SAVE_RETRY_COUNT
+    int "CRASH_LOG_SAVE_RETRY_COUNT"
+    default 5
+    depends on !REBOOT_AFTER_LOG_SAVE
+    ---help---
+        Limit the number of crash log saves in user mode during consecutive crashes to preserve flash memory lifespan.
+
+config CRASH_LOG_TIME_TEST
+    bool "CRASH_LOG_TIME_TEST"
+    default n
+    ---help---
+        Measure and record the time it takes to save the crash log to a file.
+
+endif # CRASH_LOG_SAVE
+

os/kernel/crashlog_writer/Make.defs

@@ -0,0 +1,26 @@
+###########################################################################
+#
+# Copyright 2022 Samsung Electronics All Rights Reserved.
+#
+# 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.
+#
+###########################################################################
+
+ifeq ($(CONFIG_CRASH_LOG_SAVE),y)
+
+CSRCS += crashlog_writer.c
+
+DEPPATH += --dep-path crashlog_writer
+VPATH += :crashlog_writer
+
+endif