[RuntimeDyld] Skip relocations for external symbols with 64-bit address ~0ULL.

Requested by Eugene Rozenfeld of the LLILC team, this feature allows JIT
clients to skip relocations for selected external symbols by returning ~0ULL
from their symbol resolver. If this value is returned for a given symbol,
RuntimeDyld will skip all relocations for that symbol. The client will be
responsible for applying the skipped relocations manually before the code
is executed.

llvm-svn: 241383

1 files changed, 3 insertions, 1 deletions

diff --git a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldChecker.cpp b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldChecker.cpp
index 957571b092d..ae199b72022 100644
--- a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldChecker.cpp
+++ b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldChecker.cpp
@@ -727,7 +727,9 @@ bool RuntimeDyldCheckerImpl::checkAllRulesInBuffer(StringRef RulePrefix,
 }
 
 bool RuntimeDyldCheckerImpl::isSymbolValid(StringRef Symbol) const {
-  return getRTDyld().getSymbolLocalAddress(Symbol) != nullptr;
+  if (getRTDyld().getSymbolLocalAddress(Symbol))
+    return true;
+  return !!getRTDyld().Resolver.findSymbol(Symbol);
 }
 
 uint64_t RuntimeDyldCheckerImpl::getSymbolLocalAddr(StringRef Symbol) const {