调试 Yocto 构建

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调试工具

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常见 Yocto 构建失败

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层排除问题

1. 运行以下命令，并确认输出中包含该层：
   bitbake -e | grep ^BBLAYERS=
   
2. 如果找不到该层，请检查 conf/bblayers.conf 文件的内容，确保其中包含了该层。

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调试构建

kas shell meta-qcom/ci/<machine-name>.yml:meta-qcom/ci/<distro-name>.yml:meta-qcom/ci/debug.yml
bitbake qcom-multimedia-image

KBUILD_CONFIG_EXTRA:append = " ${@oe.utils.vartrue('DEBUG_BUILD', '${S}/kernel/configs/debug.config', '', d)}"

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工具与日志

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验证 QDL 和 ModemManager

1. 要验证 ModemManager 的状态，运行以下命令：
   systemctl status ModemManager
   
   ModemManager.service - Modem Manager
   Loaded: loaded (/lib/systemd/system/ModemManager.service; enabled; vendor preset: enabled)
   Active: active (running) since Tue 2023-11-28 16:28:15 IST; 3 months 4 days ago
   Main PID: 1338 (ModemManager)
   Tasks: 3 (limit: 4915)
   CGroup: /system.slice/ModemManager.service
           └─1338 /usr/sbin/ModemManager --filter-policy=strict
   
   ps aux | grep -i modemmanager
   
   root      1338  0.0  0.0 434332  9544 ?        Ssl   2023  10:39 /usr/sbin/ModemManager --filter-policy=strict
   
2. 要停止 ModemManager，运行以下命令：
   systemctl stop ModemManager
   systemctl status ModemManager
   
   ModemManager.service - Modem Manager
   Loaded: loaded (/lib/systemd/system/ModemManager.service; enabled; vendor preset: enabled)
   Active: inactive (dead) since Sun 2024-03-03 20:08:32 IST; 4s ago
   Process: 1338 ExecStart=/usr/sbin/ModemManager --filter-policy=strict (code=exited, status=0/SUCCESS)
   Main PID: 1338 (code=exited, status=0/SUCCESS)
   
3. ps aux 命令不会显示任何 /usr/sbin/ModemManager 的条目。如果你需要 ModemManager，必须在刷写完成后重新启动它，并验证它是否已启动：
   systemctl start ModemManager
   systemctl status ModemManager
   
   ModemManager.service - Modem Manager
   Loaded: loaded (/lib/systemd/system/ModemManager.service; enabled; vendor preset: enabled)
   Active: active (running) since Sun 2024-03-03 20:11:46 IST; 43s ago
   Main PID: 14785 (ModemManager)
   Tasks: 3 (limit: 4915)
   CGroup: /system.slice/ModemManager.service
           └─14785 /usr/sbin/ModemManager --filter-policy=strict
   
   ps aux | grep -i modemmanager
   
   root     14785  4.6  0.0 434332  9160 ?        Ssl  20:11   0:00 /usr/sbin/ModemManager --filter-policy=strict