stack_trace...tsk_reliable(9)

💅 stack_trace_save_tsk_reliable(9) — a Kernel API Manual moment

okay so bestie, welcome to the Kernel API Manual, section 9, and today's main character is stack_trace_save_tsk_reliable — the stack tracer that checks its own vibe before it commits. no cap. ✨

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🌸 NAME 🌸

stack_trace_save_tsk_reliable — save a task's stack, but like… with verification 🕵️‍♀️

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🎀 SYNOPSIS 🎀

int stack_trace_save_tsk_reliable (struct task_struct *tsk , unsigned
long *store , unsigned int size );

literally the whole signature, character for character, i don't make the rules 💅

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🦋 ARGUMENTS 🦋

• tsk — pointer to the task you wanna examine 👀 like, the task in question.
• store — pointer to your storage array 🎀 that's where the goods go.
• size — the size of the storage array 📏 know your limits, queen.

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⭐ RETURN ⭐

so here's the tea: if it detects any unreliable features of the stack, you get an error. that's it, that's the deal 💀

otherwise? it guarantees the stack trace is reliable and returns the number of entries stored. slay. 👑

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💖 DESCRIPTION 💖

okay this is the important part, do not skip, i'm serious 🙈

if the task is not 'current', the caller must ensure the task is inactive.

like… must must. bold italic must. it's giving non-negotiable. 🔥

bestie i'm begging you, handle the 'current' check before you go poking at some other task's stack, ok? 🫶

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🌈 SEE ALSO 🌈

the whole friend group, in the kernel file ./kernel/stacktrace.c:

• stack_trace_print(9)
• stack_trace_snprint(9)
• stack_trace_save(9)
• stack_trace_save_tsk(9)
• stack_trace_save_regs(9)
• stack_trace_save_user(9)
• stack_trace_save(9)
• stack_trace_save_tsk(9)
• stack_trace_save_regs(9)
• stack_trace_save_user(9)
• filter_irq_stacks(9)

(yes, some of them are listed twice — i'm not editing the group chat, i'm just reading it out loud 💀)

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🧚 sign-off 🧚

this lil gem lives in ./kernel, dated October 2026, and it's filed under stack_trace...tsk_reliable(9). go forth and trace responsibly, icon 💜✨