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Fix ARM64 user stack frame mapping#404

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fix/aarch64-user-stack-frame-aliasing
Open

Fix ARM64 user stack frame mapping#404
ryanbreen wants to merge 1 commit into
mainfrom
fix/aarch64-user-stack-frame-aliasing

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@ryanbreen ryanbreen commented Jun 1, 2026

Summary

  • track actual ARM64 user-stack physical frames in GuardedStack
  • map each user stack page to its real allocated frame instead of assuming a contiguous physical range
  • keep a cold-path serial assertion when stack allocation returns non-contiguous frames

Validation

  • cargo build --release --features testing,external_test_bins --bin qemu-uefi (zero warnings/errors)
  • BREENIX_WAIT_STRESS=1 ./run.sh --parallels --test 90 under fresh Parallels VMs:
    • turn112-artifacts/stress-visible-1/serial.log: non-contiguous assertion fired; WAIT_STRESS_PASS; no DATA_ABORT/SOFT LOCKUP/FATAL/PANIC
    • turn112-artifacts/stress-visible-2/serial.log: non-contiguous assertion fired; WAIT_STRESS_PASS; no DATA_ABORT/SOFT LOCKUP/FATAL/PANIC
    • turn112-artifacts/stress-visible-3/serial.log: non-contiguous assertion fired; wait_stress reached sample 600 then serial line tore at PASS; heartbeat continued; no DATA_ABORT/SOFT LOCKUP/FATAL/PANIC

@ryanbreen @claude
Fix ARM64 user stack frame mapping
e3d10af 
Track the actual frames allocated for ARM64 user stacks and map those exact frames into process page tables instead of assuming physical contiguity. Keep a cold-path serial assertion for non-contiguous stack frame allocations.

Co-authored-by: Ryan Breen <ryan@breen.com>

Co-authored-by: Claude Code <noreply@anthropic.com>
@ryanbreen ryanbreen mentioned this pull request Jun 1, 2026
Merged
ryanbreen added a commit that referenced this pull request Jun 1, 2026
@ryanbreen
Merge pull request #408 from ryanbreen/docs/roadmap-refresh-2026-06-01
8023385 
docs: refresh roadmap to current state (session merges + #404 held)
ryanbreen added a commit that referenced this pull request Jun 1, 2026
@ryanbreen @claude
docs(roadmap): operator launcher->picker->terminal full-VM lockup + #404
f9ecf20 
 TTBR0 status

Operator hit a full-VM lockup launching the terminal via launcher->picker->terminal. Folded into the active #404 fresh-process spawn-dispatch root-cause as the primary real-world repro (leading hypothesis: same wrong-page-table-root-on-fresh-child class). Fix forward, no bisect. Committed via plumbing off origin/main so the running Codex executor working tree is untouched.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
@ryanbreen ryanbreen mentioned this pull request Jun 1, 2026
Merged
ryanbreen added a commit that referenced this pull request Jun 1, 2026
@ryanbreen @claude
docs(roadmap): operator launcher->picker->terminal full-VM lockup + #404
875f804 
 TTBR0 status (#409)

Operator hit a full-VM lockup launching the terminal via launcher->picker->terminal. Folded into the active #404 fresh-process spawn-dispatch root-cause as the primary real-world repro (leading hypothesis: same wrong-page-table-root-on-fresh-child class). Fix forward, no bisect. Committed via plumbing off origin/main so the running Codex executor working tree is untouched.

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
@ryanbreen ryanbreen mentioned this pull request Jun 2, 2026
Merged
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