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libc/execinfo: add dump_stack support

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Signed-off-by: chao.an <anchao@xiaomi.com>
This commit is contained in:
chao.an 2021-03-31 11:28:07 +08:00 committed by David Sidrane
parent 27dd771336
commit 137eb594cb
3 changed files with 76 additions and 2 deletions
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6
include/execinfo.h
View file

@ -25,10 +25,16 @@
* Public Function Prototypes
****************************************************************************/
#if defined(CONFIG_EABI_UNWINDER)
/* Store up to SIZE return address of the current program state in
* ARRAY and return the exact number of values stored.
*/
extern int backtrace(FAR void **buffer, int size);
extern void dump_stack(void);
#else
# define dump_stack()
#endif
#endif /* __INCLUDE_EXECINFO_H */

2
libs/libc/debug/Make.defs
View file

@ -20,7 +20,7 @@
ifeq ($(CONFIG_EABI_UNWINDER),y)
CSRCS += lib_backtrace.c
CSRCS += lib_backtrace.c lib_dumpstack.c
endif

68
libs/libc/debug/lib_dumpstack.c Normal file
View file

@ -0,0 +1,68 @@
/****************************************************************************
* libs/libc/debug/lib_dumpstack.c
*
* 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdio.h>
#include <syslog.h>
#include <execinfo.h>
#define DUMP_FORMAT "%*p"
#define DUMP_WIDTH (int)(2 * sizeof(FAR void *) + 3)
#define DUMP_DEPTH 16
#define DUMP_NITEM 8
#define DUMP_LINESIZE (DUMP_NITEM * DUMP_WIDTH)
/****************************************************************************
* Public Functions
****************************************************************************/
void dump_stack(void)
{
FAR void *address[DUMP_DEPTH];
char line[DUMP_LINESIZE];
int ret = 0;
int size;
int i;
size = backtrace(address, DUMP_DEPTH);
if (size <= 0)
{
return;
}
for (i = 0; i < size; i++)
{
ret += snprintf(line + ret, sizeof(line) - ret,
DUMP_FORMAT, DUMP_WIDTH, address[i]);
if (i == size - 1 || ret % DUMP_LINESIZE == 0)
{
syslog(LOG_INFO, "[BackTrace]: %s\n", line);
ret = 0;
}
}
}