242b50f921
Add a common method to format backtrace to buffer, so it can be used by both mm, fs and other possoble modules. Signed-off-by: fangpeina <fangpeina@xiaomi.com>
127 lines
3.3 KiB
C
127 lines
3.3 KiB
C
/****************************************************************************
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* libs/libc/misc/lib_execinfo.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <execinfo.h>
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#include <stdio.h>
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#include "libc.h"
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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static FAR char **backtrace_malloc(FAR void *const *buffer, int size)
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{
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size_t length = 0;
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if (size <= 0)
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{
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return NULL;
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}
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while (size-- > 0)
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{
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int ret = snprintf(NULL, 0, "%pS", *buffer++);
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if (ret < 0)
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{
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return NULL;
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}
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length += sizeof(FAR char *) + ret + 1;
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}
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return lib_malloc(length);
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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FAR char **backtrace_symbols(FAR void *const *buffer, int size)
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{
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FAR char **syms;
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FAR char *buf;
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int i;
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syms = backtrace_malloc(buffer, size);
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if (syms != NULL)
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{
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buf = (FAR char *)&syms[size];
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for (i = 0; i < size; i++)
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{
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syms[i] = buf;
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buf += sprintf(buf, "%pS", buffer[i]);
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buf += 1;
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}
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}
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return syms;
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}
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void backtrace_symbols_fd(FAR void *const *buffer, int size, int fd)
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{
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int i;
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for (i = 0; i < size; i++)
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{
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dprintf(fd, "%pS\n", buffer[i]);
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}
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}
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/****************************************************************************
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* Name: backtrace_format
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*
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* Description:
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* Format a backtrace into a buffer for dumping.
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*
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****************************************************************************/
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int backtrace_format(FAR char *buffer, int size,
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FAR void *backtrace[], int depth)
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{
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FAR const char *format = "%0*p ";
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int len = 0;
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int i;
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if (size < 1)
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{
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return 0;
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}
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buffer[0] = '\0';
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for (i = 0; i < depth && backtrace[i]; i++)
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{
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if (i * BACKTRACE_PTR_FMT_WIDTH >= size)
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{
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break;
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}
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len += snprintf(buffer + i * BACKTRACE_PTR_FMT_WIDTH,
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size - i * BACKTRACE_PTR_FMT_WIDTH,
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format, BACKTRACE_PTR_FMT_WIDTH - 1, backtrace[i]);
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}
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return len;
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}
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