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Mihawk
e98cca409c
../PS5_Proton found that a title can have Sony's service start a fresh
executable as a child of its application (sceSystemServiceAddLocalProcess
with the libc-only preload mask, a socket at the child's descriptor 3,
sceSystemServiceKillLocalProcess). This probe asks what that is worth
here.
- frontends/child-probe: a frontend program (SDL2, PS5_OpenGL) that the
title hands over to with LoadExec, as it does ES-DE. It holds the
display while running a headless child, keeps a child alive across
its own LoadExec, then releases the display and starts a graphics
child. "nogpu" mode starts one without ever opening the display.
- frontends/child-probe-helper: the headless child, freestanding C with
only libkernel, reporting its PID and the memory it sees.
- tooling/native: --preload-prx-flags writes the preload mask into the
process parameters (0x50), as PS5_Proton's patch to the same tool
does. Without it the output is unchanged.
Result on the base PS5 (13.40): a headless child starts in 0.12 s and
closes cleanly (kill 0, gone from the list). It reads the same flexible
memory figure as the parent (one budget), and it does not survive the
parent's LoadExec. A graphics child fails before its code runs
(gbase_gvmsw_open 6978, PRX_PROCESS_STARTUP_FAILURE), whether or not
the parent ever opened the display, and Sony then kills the whole
application.
Evidence: evidence/child-processes/ (capture.json, expectation.json,
probe-run-1.jsonl, probe-run-2-nogpu.jsonl). Command:
PS5_FRONTENDS='es-de picker child-probe' tools/build-title.sh
tools/run-title.sh --no-build --relaunch-test=1 \
--relaunch-image=es-de/child-probe.bin --watch 120
Gates: tools/verify.sh PASS (format unit build integration evidence).
14 lines
729 B
JSON
14 lines
729 B
JSON
{
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"step": "child-processes",
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"note": "Sony's local processes (sceSystemServiceAddLocalProcess, ../PS5_Proton's route) on the base PS5 13.40: a headless child starts from a LoadExec'd frontend in 0.12 s and closes cleanly, but shares the application's memory budget, dies with the parent's LoadExec, and cannot have the GPU: a graphics child fails at startup (gbase_gvmsw_open 6978) and Sony then kills the whole application.",
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"must_contain": [
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"headless child closed: kill status 0, present after 0",
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"(one budget)",
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"listed after 0",
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"gbase_gvmsw_open 6978 error; exception 0xa0020104",
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"graphics child from a parent that never opened the display"
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],
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"must_not_contain": [],
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"human_check": ""
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}
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