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40 lines
1.2 KiB
Markdown
40 lines
1.2 KiB
Markdown
# FIQ-Debugger
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[参考文章:Linux/Android常用调试工具](http://blog.csdn.net/azloong/article/details/45768633)
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## 代码实现
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参考 kernel/drivers/staging/android/fiq_debugger/fiq_debugger.c
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## 内核配置
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CONFIG_FIQ_DEBUGGER // 使能fiq debugger
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CONFIG_FIQ_DEBUGGER_CONSOLE // fiq debugger与console可以互相切换
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CONFIG_FIQ_DEBUGGER_CONSOLE_DEFAULT_ENABLE // 启动时默认串口在console模式
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## 进入FIQ Debugger
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使用minicom进入FIQ Debug mode
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(在RK3399上按完ctrl+a+f后还要按fiq才能进入debug模式,在函数fiq_debugger_handle_uart_interrupt中设置的)
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ctrl+a+z+f 或 ctrl+a+f
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退出debug模式
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输入console
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## Process/Thread状态
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"R (running)", /* 0 */
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"S (sleeping)", /* 1 */
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"D (disk sleep)", /* 2 */
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"T (stopped)", /* 4 */
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"t (tracing stop)", /* 8 */
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"Z (zombie)", /* 16 */
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"X (dead)", /* 32 */
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"x (dead)", /* 64 */
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"K (wakekill)", /* 128 */
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"W (waking)", /* 256 */
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通常一般的Process处于的状态都是S(sleeping)，而如果一旦发现处于如D(disk sleep)、T(stopped)、Z(zombie)等就要认真审查
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