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[js] Simplify tracing of arguments in MarkThisAndArguments.

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Moonchild 2024-04-17 21:25:30 +02:00 • committed by roytam1
commit dc52303799
1 changed files with 13 additions and 13 deletions
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28
js/src/jit/JitFrames.cpp
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@ -1049,31 +1049,31 @@ MarkThisAndArguments(JSTracer* trc, const JitFrameIterator& frame)
if (!CalleeTokenIsFunction(layout->calleeToken())) if (!CalleeTokenIsFunction(layout->calleeToken()))
return; return;
size_t nargs = layout->numActualArgs();
size_t nformals = 0;
JSFunction* fun = CalleeTokenToFunction(layout->calleeToken()); JSFunction* fun = CalleeTokenToFunction(layout->calleeToken());
if (!frame.isExitFrameLayout<LazyLinkExitFrameLayout>() && size_t numFormals = fun->nargs();
!fun->nonLazyScript()->mayReadFrameArgsDirectly()) size_t numArgs = Max(layout->numActualArgs(), numFormals);
{ size_t firstArg = 0;
nformals = fun->nargs();
}
size_t newTargetOffset = Max(nargs, fun->nargs()); if (!frame.isExitFrameLayout<LazyLinkExitFrameLayout>() &&
!fun->nonLazyScript()->mayReadFrameArgsDirectly()) {
firstArg = numFormals;
}
Value* argv = layout->argv(); Value* argv = layout->argv();
// Trace |this|. // Trace |this|.
TraceRoot(trc, argv, "ion-thisv"); TraceRoot(trc, argv, "ion-thisv");
// Trace actual arguments beyond the formals. Note + 1 for thisv. // Trace arguments. Note + 1 for thisv.
for (size_t i = nformals + 1; i < nargs + 1; i++) for (size_t i = firstArg; i < numArgs; i++) {
TraceRoot(trc, &argv[i], "ion-argv"); TraceRoot(trc, &argv[i + 1], "ion-argv");
}
// Always mark the new.target from the frame. It's not in the snapshots. // Always mark the new.target from the frame. It's not in the snapshots.
// +1 to pass |this| // +1 to pass |this|
if (CalleeTokenIsConstructing(layout->calleeToken())) if (CalleeTokenIsConstructing(layout->calleeToken())) {
TraceRoot(trc, &argv[1 + newTargetOffset], "ion-newTarget"); TraceRoot(trc, &argv[1 + numArgs], "ion-newTarget");
}
} }
#ifdef JS_NUNBOX32 #ifdef JS_NUNBOX32