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139 lines
3.5 KiB
C
139 lines
3.5 KiB
C
/****************************************************************************
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*
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* Copyright (c) 2014, 2021 Andrew Tridgell. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name PX4 nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/**
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* @file reflect.c
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*
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* simple data reflector for load testing terminals (especially USB)
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*
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* @author Andrew Tridgell
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*/
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#include <px4_platform_common/px4_config.h>
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#include <inttypes.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <assert.h>
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#include <systemlib/err.h>
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__EXPORT int reflect_main(int argc, char *argv[]);
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// memory corruption checking
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#define MAX_BLOCKS 1000
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struct block {
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uint32_t v[256];
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};
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#define VALUE(i) ((i*7) ^ 0xDEADBEEF)
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static uint32_t allocate_blocks(struct block **blocks)
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{
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uint32_t nblocks = 0;
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while (nblocks < MAX_BLOCKS) {
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blocks[nblocks] = calloc(1, sizeof(struct block));
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if (blocks[nblocks] == NULL) {
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break;
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}
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for (uint32_t i = 0; i < sizeof(blocks[nblocks]->v) / sizeof(uint32_t); i++) {
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blocks[nblocks]->v[i] = VALUE(i);
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}
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nblocks++;
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}
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printf("Allocated %" PRIu32 " blocks\n", nblocks);
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return nblocks;
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}
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static void check_blocks(struct block **blocks, uint32_t nblocks)
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{
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for (uint32_t n = 0; n < nblocks; n++) {
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for (uint32_t i = 0; i < sizeof(blocks[nblocks]->v) / sizeof(uint32_t); i++) {
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assert(blocks[n]->v[i] == VALUE(i));
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}
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}
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}
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int
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reflect_main(int argc, char *argv[])
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{
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uint32_t total = 0;
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uint32_t nblocks = 0;
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printf("Starting reflector\n");
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struct block **blocks = NULL;
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blocks = malloc(sizeof(struct block *) * MAX_BLOCKS);
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if (blocks == NULL) {
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return -1;
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}
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while (nblocks < MAX_BLOCKS) {
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blocks[nblocks] = NULL;
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nblocks++;
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}
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nblocks = allocate_blocks(blocks);
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while (true) {
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char buf[128];
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ssize_t n = read(0, buf, sizeof(buf));
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if (n < 0) {
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break;
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}
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if (n > 0) {
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if (write(1, buf, n) < 0) {
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return -1;
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}
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}
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total += n;
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if (total > 1024000) {
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check_blocks(blocks, nblocks);
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total = 0;
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}
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}
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return OK;
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}
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