92 lines
2.8 KiB
C
92 lines
2.8 KiB
C
/****************************************************************************
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* libs/libc/sched/sched_dumpstack.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 <nuttx/config.h>
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#include <nuttx/allsyms.h>
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#include <sys/types.h>
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#include <stdio.h>
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#include <syslog.h>
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#include <execinfo.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define DUMP_DEPTH 16
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#define DUMP_NITEM 8
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#define DUMP_WIDTH (int)(2 * sizeof(FAR void *) + 2)
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#define DUMP_LINESZ (DUMP_NITEM * (DUMP_WIDTH + 1))
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: sched_dumpstack
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*
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* Description:
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* Dump thread backtrace from specified tid.
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*
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****************************************************************************/
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void sched_dumpstack(pid_t tid)
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{
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FAR void *address[DUMP_DEPTH];
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#ifndef CONFIG_ALLSYMS
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const char *format = " %0*p";
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char line[DUMP_LINESZ + 1];
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int ret = 0;
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#endif
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int size;
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int i;
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size = sched_backtrace(tid, address, DUMP_DEPTH);
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if (size <= 0)
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{
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return;
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}
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#ifndef CONFIG_ALLSYMS
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for (i = 0; i < size; i++)
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{
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ret += snprintf(line + ret, sizeof(line) - ret,
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format, DUMP_WIDTH, address[i]);
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if (i == size - 1 || ret % DUMP_LINESZ == 0)
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{
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syslog(LOG_EMERG, "backtrace|%2d:%s\n", tid, line);
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ret = 0;
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}
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}
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#else
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syslog(LOG_EMERG, "backtrace:\n");
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for (i = 0; i < size; i++)
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{
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syslog(LOG_EMERG, "[%2d] [<%p>] %pS\n",
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tid, address[i], address[i]);
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}
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#endif
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}
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