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ALSA snd_pcm_hw_params_any 从启动脚本自动运行时崩溃

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ALSA snd_pcm_hw_params_any 从启动脚本自动运行时崩溃

我下载了 ALSA 示例源代码（https://gist.github.com/ghedo/963382) 并在 putty 窗口下测试运行，它可以工作。但是，当放入启动脚本（例如 rc.local）时，无论是否带有“sudo”，它都会崩溃。

注意：应用程序仅在开机自动运行后崩溃；如果在 putty（命令行）中运行脚本，则没有问题。

在每个 snd_xxx 函数调用前添加日志记录后，发现应用程序在调用 snd_pcm_hw_params_any 后停止，这意味着它在 snd_pcm_open 和 snd_pcm_hw_params_alloca 之后崩溃。以下是代码：

    g_pLog->LogInfo(LOG_SYS, "[audio]snd_pcm_open"); /////logged 
    if ((pcm = snd_pcm_open(&pcm_handle, acDev, /////PCM_DEVICE, acDev="default:0"
                    SND_PCM_STREAM_PLAYBACK, 0)) < 0)
    {
        sprintf(acLog, "[audio]Can't open \"%s\" PCM device. %s\n", acDev, snd_strerror(pcm));
        g_pLog->LogInfo(LOG_SYS, acLog);
        return -1;
    }


    g_pLog->LogInfo(LOG_SYS, "[audio]snd_pcm_hw_params_alloca");  /////logged
    /* Allocate parameters object and fill it with default values*/
    snd_pcm_hw_params_alloca(&params);

    g_pLog->LogInfo(LOG_SYS, "[audio]snd_pcm_hw_params_any");  /////logged and is the last line
    snd_pcm_hw_params_any(pcm_handle, params);

    g_pLog->LogInfo(LOG_SYS, "[audio]snd_pcm_hw_params_set_access");
    /* Set parameters */
    if (pcm = snd_pcm_hw_params_set_access(pcm_handle, params,
                    SND_PCM_ACCESS_RW_INTERLEAVED) < 0)
...

收集完core dump文件后用gdb "bt full"检查，结果是：

root@linaro-ubuntu-desktop:/test# gdb ./AudioPlayer /opt/core.AudioPlayer.6277.1604311455.6
GNU gdb (Ubuntu/Linaro 7.3-0ubuntu2) 7.3-2011.08
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "arm-linux-gnueabi".
For bug reporting instructions, please see:
<http://bugs.launchpad.net/gdb-linaro/>...
Reading symbols from /test/AudioPlayer...(no debugging symbols found)...done.
[New LWP 6277]
[Thread debugging using libthread_db enabled]
Core was generated by `/test/AudioPlayer'.
Program terminated with signal 6, Aborted.
#0  0x2ad8bed6 in ?? () from /lib/arm-linux-gnueabi/libc.so.6
(gdb) bt full
#0  0x2ad8bed6 in ?? () from /lib/arm-linux-gnueabi/libc.so.6
No symbol table info available.
#1  0x2ad9a0da in raise () from /lib/arm-linux-gnueabi/libc.so.6
No symbol table info available.
#2  0x2ad9c506 in abort () from /lib/arm-linux-gnueabi/libc.so.6
No symbol table info available.
#3  0x2ad951ec in __assert_fail () from /lib/arm-linux-gnueabi/libc.so.6
No symbol table info available.
#4  0x2ac6cb72 in snd_pcm_hw_refine () from /usr/lib/arm-linux-gnueabi/libasound.so.2
No symbol table info available.
#5  0x0000aca8 in main ()
No symbol table info available.

注意“snd_pcm_hw_refine”不是直接从应用程序调用的。

我想知道在 Putty 中运行和从开机启动脚本运行之间有什么区别，以及如何解决此故障。如果您能提供建议，我将不胜感激...

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