150 lines
3.8 KiB
C
150 lines
3.8 KiB
C
/****************************************************************************
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* apps/system/trace/trace_dump.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/note/noteram_driver.h>
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#include <fcntl.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/ioctl.h>
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#include <unistd.h>
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#include "trace.h"
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/****************************************************************************
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* Name: note_ioctl
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****************************************************************************/
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static void note_ioctl(int cmd, unsigned long arg)
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{
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int notefd;
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notefd = open("/dev/note/ram", O_RDONLY);
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if (notefd < 0)
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{
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fprintf(stderr, "trace: cannot open /dev/note/ram\n");
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return;
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}
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ioctl(notefd, cmd, arg);
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close(notefd);
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: trace_dump
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*
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* Description:
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* Read notes and dump trace results.
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*
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****************************************************************************/
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int trace_dump(FAR FILE *out)
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{
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uint8_t tracedata[UCHAR_MAX];
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int ret;
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int fd;
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/* Open note for read */
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fd = open("/dev/note/ram", O_RDONLY);
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if (fd < 0)
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{
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fprintf(stderr, "trace: cannot open /dev/note/ram\n");
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return ERROR;
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}
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/* Read and output all notes */
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while (1)
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{
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ret = read(fd, tracedata, sizeof tracedata);
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if (ret <= 0)
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{
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break;
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}
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fwrite(tracedata, 1, ret, out);
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}
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/* Close note */
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close(fd);
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return ret;
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}
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/****************************************************************************
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* Name: trace_dump_clear
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*
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* Description:
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* Clear all contents of the buffer
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*
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****************************************************************************/
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void trace_dump_clear(void)
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{
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note_ioctl(NOTERAM_CLEAR, 0);
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}
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/****************************************************************************
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* Name: trace_dump_get_overwrite
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*
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* Description:
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* Get overwrite mode
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*
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****************************************************************************/
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bool trace_dump_get_overwrite(void)
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{
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unsigned int mode = 0;
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note_ioctl(NOTERAM_GETMODE, (unsigned long)&mode);
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return mode == NOTERAM_MODE_OVERWRITE_ENABLE;
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}
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/****************************************************************************
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* Name: trace_dump_set_overwrite
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*
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* Description:
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* Set overwrite mode
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*
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****************************************************************************/
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void trace_dump_set_overwrite(bool enable)
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{
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unsigned int mode;
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mode = enable ? NOTERAM_MODE_OVERWRITE_ENABLE :
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NOTERAM_MODE_OVERWRITE_DISABLE;
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note_ioctl(NOTERAM_SETMODE, (unsigned long)&mode);
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}
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