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examples/sotest: Add a test for shared libraries.
This commit is contained in:
Gregory Nutt
247
examples/sotest/sotest_main.c
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247
examples/sotest/sotest_main.c
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/****************************************************************************
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* examples/sotest/sotest_main.c
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*
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* Copyright (C) 2015, 2017 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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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 NuttX 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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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/mount.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <syslog.h>
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#include <dllfcn.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/drivers/ramdisk.h>
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#include <nuttx/binfmt/symtab.h>
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#include "lib/romfs.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Check configuration. This is not all of the configuration settings that
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* are required -- only the more obvious.
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*/
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#ifndef CONFIG_LIBC_DLLFCN
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# error "You must select CONFIG_LIBC_DLLFCN in your configuration file"
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#endif
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#ifndef CONFIG_FS_ROMFS
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# error "You must select CONFIG_FS_ROMFS in your configuration file"
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#endif
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#ifdef CONFIG_DISABLE_MOUNTPOINT
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# error "You must not disable mountpoints via CONFIG_DISABLE_MOUNTPOINT in your configuration file"
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#endif
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/* Describe the ROMFS file system */
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#define SECTORSIZE 64
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#define NSECTORS(b) (((b)+SECTORSIZE-1)/SECTORSIZE)
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#define MOUNTPT "/mnt/romfs"
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#ifndef CONFIG_EXAMPLES_SOTEST_DEVMINOR
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# define CONFIG_EXAMPLES_SOTEST_DEVMINOR 0
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#endif
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#ifndef CONFIG_EXAMPLES_SOTEST_DEVPATH
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# define CONFIG_EXAMPLES_SOTEST_DEVPATH "/dev/ram0"
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#endif
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/****************************************************************************
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* Private data
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****************************************************************************/
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/****************************************************************************
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* Symbols from Auto-Generated Code
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****************************************************************************/
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extern const struct symtab_s exports[];
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extern const int nexports;
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: sotest_main
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****************************************************************************/
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#ifdef CONFIG_BUILD_KERNEL
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int main(int argc, FAR char *argv[])
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#else
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int sotest_main(int argc, char *argv[])
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#endif
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{
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FAR void *handle;
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CODE void (*testfunc)(FAR const char *msg);
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FAR const char *msg;
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int ret;
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/* Set the shared library symbol table */
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ret = dlsymtab((FAR struct symtab_s *)exports, nexports);
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if (ret < 0)
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{
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fprintf(stderr, "ERROR: dlsymtab failed: %d\n", ret);
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exit(EXIT_FAILURE);
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}
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/* Create a ROM disk for the ROMFS filesystem */
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printf("main: Registering romdisk at /dev/ram%d\n",
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CONFIG_EXAMPLES_SOTEST_DEVMINOR);
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ret = romdisk_register(CONFIG_EXAMPLES_SOTEST_DEVMINOR,
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(FAR uint8_t *)romfs_img,
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NSECTORS(romfs_img_len), SECTORSIZE);
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if (ret < 0)
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{
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/* This will happen naturally if we registered the ROM disk previously. */
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if (ret != -EEXIST)
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{
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fprintf(stderr, "ERROR: romdisk_register failed: %d\n", ret);
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exit(EXIT_FAILURE);
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}
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printf("main: ROM disk already registered\n");
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}
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/* Mount the file system */
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printf("main: Mounting ROMFS filesystem at target=%s with source=%s\n",
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MOUNTPT, CONFIG_EXAMPLES_SOTEST_DEVPATH);
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ret = mount(CONFIG_EXAMPLES_SOTEST_DEVPATH, MOUNTPT, "romfs", MS_RDONLY, NULL);
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if (ret < 0)
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{
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fprintf(stderr, "ERROR: mount(%s,%s,romfs) failed: %s\n",
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CONFIG_EXAMPLES_SOTEST_DEVPATH, MOUNTPT, errno);
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exit(EXIT_FAILURE);
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}
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/* Install the test shared library */
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handle = dlopen(MOUNTPT "/sotest", RTLD_NOW | RTLD_LOCAL);
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if (handle == NULL)
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{
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fprintf(stderr, "ERROR: dlopen failed\n");
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exit(EXIT_FAILURE);
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}
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/* Get symbols testfunc1 and msg1 */
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testfunc = (CODE void (*)(FAR const char *))dlsym(handle, "testfunc1");
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if (testfunc == NULL)
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{
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fprintf(stderr, "ERROR: Failed to get symbol \"testfunc1\"\n");
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exit(EXIT_FAILURE);
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}
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msg = (FAR const char *)dlsym(handle, "g_msg1");
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if (msg == NULL)
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{
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fprintf(stderr, "ERROR: Failed to get symbol \"g_msg1\"\n");
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exit(EXIT_FAILURE);
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}
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/* Execute testfunc1 */
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testfunc(msg);
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/* Get symbols testfunc2 and msg2 */
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testfunc = (CODE void (*)(FAR const char *))dlsym(handle, "testfunc2");
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if (testfunc == NULL)
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{
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fprintf(stderr, "ERROR: Failed to get symbol \"testfunc2\"\n");
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exit(EXIT_FAILURE);
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}
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msg = (FAR const char *)dlsym(handle, "g_msg2");
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if (msg == NULL)
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{
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fprintf(stderr, "ERROR: Failed to get symbol \"g_msg2\"\n");
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exit(EXIT_FAILURE);
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}
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/* Execute testfunc2 */
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testfunc(msg);
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/* Get symbols testfunc3 and msg3 */
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testfunc = (CODE void (*)(FAR const char *))dlsym(handle, "testfunc3");
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if (testfunc == NULL)
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{
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fprintf(stderr, "ERROR: Failed to get symbol \"testfunc3\"\n");
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exit(EXIT_FAILURE);
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}
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msg = (FAR const char *)dlsym(handle, "g_msg3");
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if (msg == NULL)
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{
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fprintf(stderr, "ERROR: Failed to get symbol \"g_msg3\"\n");
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exit(EXIT_FAILURE);
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}
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/* Execute testfunc3 */
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testfunc(msg);
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ret = dlclose(handle);
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if (ret < 0)
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{
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fprintf(stderr, "ERROR: rmmod failed: %d\n", ret);
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exit(EXIT_FAILURE);
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}
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ret = umount(MOUNTPT);
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if (ret < 0)
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{
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fprintf(stderr, "ERROR: umount(%s) failed: %d\n",
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MOUNTPT, errno);
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exit(EXIT_FAILURE);
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}
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return EXIT_SUCCESS;
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}
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