perf record tips — authorized sampling literacy

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For legal, authorized and educational use only. Only analyze software you own or have written permission to examine.
Quick answer

perf record helps authorized labs capture short sampling windows on hosts they own. Pair with strace-syscalls-tips, ltrace-libcalls-tips, and bpftrace-tips.

On this page

Snapshot

FieldValue
Surfaceperf record tip checklist
JobAuthorized CPU-sampling literacy
Syscall peerstrace-syscalls-tips
Libcall peerltrace-libcalls-tips
bpftrace peerbpftrace-tips

Tip checklist (authorized only)

  1. Confirm you may sample the host/process (lab VM / your build / courseware).
  2. Record binary path, event list (-e), duration, and perf version in Evidence.
  3. Capture only a short window — prefer time-boxed -a / -p runs over day-long dumps.
  4. Quote a few representative perf report lines; redact symbols that leak secrets.
  5. Note kernel / CPU / privilege level so Evidence stays reproducible.
  6. Optional: when attach-style traces help more, use strace-syscalls-tips.
  7. Optional: when one-liners on probes fit the syllabus, use bpftrace-tips.
  8. Redact secrets, cookies, tokens, and home-directory paths before sharing.

Allowed framing

  • Classroom sampling of student-written helpers you control.
  • Binding hashed binary + short sample excerpt + event note.
  • Documenting "permission denied / missing symbols" as valid lab outcomes.
  • Comparing perf samples ↔ strace/ltrace under one binder.

Scope we will not cover

  • No crack/pirate/keygen of commercial apps via sampling.
  • No exploit / side-channel / ASLR-bypass PoCs mined from perf.
  • No credential-theft from sample stacks or maps.
  • No unauthorized sampling of third-party production hosts.

Beginner path (authorized only)

  1. Build one syllabus-approved helper you control.
  2. Run a short perf record window and inspect with perf report.
  3. Hash binary + note tool/kernel versions; bind Evidence.
  4. Optional: capture a matching strace or bpftrace window for a second Evidence lane.
  5. Stop at literacy — no exploit cookbooks.
Which to pick
  • Prefer authorized, time-boxed, redacted Evidence.
  • Use strace / bpftrace peers when the syllabus asks.
  • No exploit, crack, or credential-theft framing.

For legal, authorized and educational use only.

FAQ

What is a "perf record tip" page in BinBench framing?

A checklist for sampling authorized processes/hosts you own (lab VMs, your builds, courseware) — not a cookbook for attacking third-party hosts.

How does this relate to strace-syscalls-tips / ltrace-libcalls-tips?

Those pages cover attach-style traces. This page zooms on sampling Evidence habits with perf record — it does not overwrite those pages.

Can I sample software I do not own to crack or bypass it?

No. Authorization first. BinBench will not publish crack/bypass recipes.

Does this teach exploit / side-channel / bypass PoCs via perf?

No. Mentions of exploit/bypass appear only as refusals. Authorized sampling literacy only.

Does this teach credential theft from sample data?

No. Redact secrets, tokens, and PII in Evidence before sharing.

Sources