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[Fix] (MGPipe): make the applier's own verb-boundary clear mandatory rather than inherited from the client's fill, and name the argument in an argument-narrowed abort so the two halves of the pixel store do not print the same line

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swung0x48
2026-09-11 14:53:39 -04:00
parent c16411aa33
commit 3cb2c4aa9a
2 changed files with 69 additions and 15 deletions
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MobileGL/MG_Backend/MGPipe/PipeInputs.cpp
+19 -6
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@@ -152,16 +152,29 @@ namespace MobileGL::MG_Pipe {
CountBarrierPull(field, verb);
}
void MGPipeInputArgumentRead(MGPipeInputField field, Uint32 arg0, MGPipeVerb verb, Bool serverStamped) {
if (!serverStamped) return;
Bool MGPipeInputArgumentRead(MGPipeInputField field, Uint32 arg0, MGPipeVerb verb, Bool serverStamped) {
if (!serverStamped) return false;
const MGPipeFieldOwnership narrowed = MGPipeFieldOwnershipOf(field, arg0);
if (narrowed == MGPipeFieldOwnershipOf(field)) return; // the argument narrows nothing
if (narrowed == MGPipeFieldOwnershipOf(field)) return false; // the argument narrows nothing
if (narrowed == MGPipeFieldOwnership::kFatal) {
// The field's own stamp says fresh - the applier really did write the half that has
// a carrier - so only the argument can say that THIS read is unserved.
MGPipeInputPoisonFatalForVerb(field, verb);
// a carrier - so only the argument can say that THIS read is unserved. THE MESSAGE
// NAMES THE ARGUMENT, because without it this line is byte-identical to what a
// genuinely stale read of the OTHER half would print, and the whole case for
// narrowing by argument rather than by a second field id is that the reader is told
// which half they asked for.
MGLOG_F("MGPipe: Fatal{UnmigratedPipeInput, \"%s@%s\"} [argument 0 = %u is %s while the "
"field is %s]",
kMGPipeInputFieldNames[static_cast<SizeT>(field)], MGPipeVerbName(verb), arg0,
MGPipeFieldOwnershipName(narrowed),
MGPipeFieldOwnershipName(MGPipeFieldOwnershipOf(field)));
std::abort();
}
if (narrowed == MGPipeFieldOwnership::kBarrierPulled) CountBarrierPull(field, verb);
if (narrowed == MGPipeFieldOwnership::kBarrierPulled) {
CountBarrierPull(field, verb);
return true; // decided here; the field-level check must not count it again
}
return true;
}
void MGPipeStickyForwardPull(MGPipeInputField field) {