From a963bc490d689cdd2e46d0c347f8e0927b502fdd Mon Sep 17 00:00:00 2001
From: Vincent Lee <leevince@fb.com>
Date: Wed, 5 Jan 2022 15:05:09 -0800
Subject: [PATCH] [lld-macho] Increase slops to prevent thunk out of range

One of our internal arm64 apps hit a thunk out of range error when building
with LLD. Per the comment, I'm arbitrarily increasing slop size to 256.

Reviewed By: #lld-macho, thakis

Differential Revision: https://reviews.llvm.org/D116705
---
 lld/MachO/ConcatOutputSection.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lld/MachO/ConcatOutputSection.cpp b/lld/MachO/ConcatOutputSection.cpp
index 9f71e81b073a8..f63c2e6eb321c 100644
--- a/lld/MachO/ConcatOutputSection.cpp
+++ b/lld/MachO/ConcatOutputSection.cpp
@@ -244,7 +244,7 @@ void ConcatOutputSection::finalize() {
     // 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 = 100 * thunkSize;
+    unsigned slop = 256 * thunkSize;
     while (finalIdx < endIdx && isecAddr + inputs[finalIdx]->getSize() <
                                     isecVA + forwardBranchRange - slop)
       finalizeOne(inputs[finalIdx++]);