[Verse 1] When your module starts to crash and burn tonight No blue screen wisdom, just a kernel's dying light Load it up with insmod, watch the system freeze Time to hunt the phantom bugs among the trees Print-k becomes your flashlight in the code Kernel log messages light up the road [Chorus] Debug, test, and trace the flow Print-k tells you what to know Proc and sysfs, windows wide Peek inside the kernel's mind Test each path before you're done Module safety, line by line [Verse 2] Sysfs entries show the state beneath the hood Export parameters like a detective would Echo values, read the files that drivers make Watch the numbers change with every step you take Proc filesystem holds the secrets that you need Runtime status feeds your debugging greed [Chorus] Debug, test, and trace the flow Print-k tells you what to know Proc and sysfs, windows wide Peek inside the kernel's mind Test each path before you're done Module safety, line by line [Bridge] Unit testing in the kernel space requires care Mock the hardware, stub the calls that aren't there Static analysis catches what your eyes might miss Sparse and coccinelle find the code amiss Memory leaks and race conditions hide so well Only thorough testing breaks their silent spell [Verse 3] GDB with KGDB when the going gets rough Breakpoints in the kernel when printf's not enough Ftrace records function calls like breadcrumbs in the night Call graphs reveal the execution flight Error injection tests the paths nobody wants Resilient code survives what failure haunts [Outro] From development to production grade Every kernel module carefully made Debug wisdom guides you through Testing makes your code ring true
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