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Bug 887921 - Don't toggle GC write barriers in parallel execution. (r=sstangl)

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This commit is contained in:
Shu-yu Guo 2013-07-03 09:47:28 -07:00
parent 66ee89e766
commit fcd8c3ba4b
1 changed files with 15 additions and 5 deletions
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20
js/src/ion/CodeGenerator.cpp
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@ -5476,11 +5476,21 @@ CodeGenerator::link()
if (callTargets.length() > 0)
ionScript->copyCallTargetEntries(callTargets.begin());
// The correct state for prebarriers is unknown until the end of compilation,
// since a GC can occur during code generation. All barriers are emitted
// off-by-default, and are toggled on here if necessary.
if (cx->zone()->needsBarrier())
ionScript->toggleBarriers(true);
switch (executionMode) {
case SequentialExecution:
// The correct state for prebarriers is unknown until the end of compilation,
// since a GC can occur during code generation. All barriers are emitted
// off-by-default, and are toggled on here if necessary.
if (cx->zone()->needsBarrier())
ionScript->toggleBarriers(true);
break;
case ParallelExecution:
// We don't run incremental GC during parallel execution; no need to
// turn on barriers.
break;
default:
MOZ_ASSUME_UNREACHABLE("No such execution mode");
}
return true;
}