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-rw-r--r--lld/lib/ReaderWriter/MachO/MachOLinkingContext.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/lld/lib/ReaderWriter/MachO/MachOLinkingContext.cpp b/lld/lib/ReaderWriter/MachO/MachOLinkingContext.cpp
index 114a1b8153a..ee85f5c3331 100644
--- a/lld/lib/ReaderWriter/MachO/MachOLinkingContext.cpp
+++ b/lld/lib/ReaderWriter/MachO/MachOLinkingContext.cpp
@@ -705,6 +705,7 @@ void MachOLinkingContext::createImplicitFiles(
void MachOLinkingContext::registerDylib(MachODylibFile *dylib,
bool upward) const {
+ std::lock_guard<std::mutex> lock(_dylibsMutex);
_allDylibs.insert(dylib);
_pathToDylibMap[dylib->installName()] = dylib;
// If path is different than install name, register path too.
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