[PATCH] D138174: [lld-macho] Increase slop to prevent thunk out of range again.
Mike Hommey via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Wed Nov 16 17:59:56 PST 2022
glandium created this revision.
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Building Firefox with -O0 on arm64 mac recently hit the
"FIXME: thunk range overrun" error on multiple occasions.
Doubling or tripling slop was not sufficient in some cases, so
quadruple it.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D138174
Files:
lld/MachO/ConcatOutputSection.cpp
Index: lld/MachO/ConcatOutputSection.cpp
===================================================================
--- lld/MachO/ConcatOutputSection.cpp
+++ lld/MachO/ConcatOutputSection.cpp
@@ -246,7 +246,7 @@
// contains several branch instructions in succession, then the distance
// from the current position to the position where the thunks are inserted
// grows. So leave room for a bunch of thunks.
- unsigned slop = 256 * thunkSize;
+ unsigned slop = 1024 * thunkSize;
while (finalIdx < endIdx && addr + size + inputs[finalIdx]->getSize() <
isecVA + forwardBranchRange - slop)
finalizeOne(inputs[finalIdx++]);
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