[ORC] Add ExecutionSession convenience methods to access bootstrap values.

The getBootstrapMap, getBootstrapMapValue, getBootstrapSymbolsMap, and
getBootstrapSymbols methods forward to their respective counterparts in
ExecutorProcessControl, similar to the callWrapper functions.

These methods will be used to simplify an upcoming patch that accesses
the bootstrap values.

(cherry picked from commit 63bb4ba)

Author: lhames

llvm/include/llvm/ExecutionEngine/Orc/Core.h

@@ -1556,6 +1556,30 @@ class ExecutionSession {
     EPC->getDispatcher().dispatch(std::move(T));
   }
 
+  /// Returns the bootstrap map.
+  const StringMap<std::vector<char>> &getBootstrapMap() const {
+    return EPC->getBootstrapMap();
+  }
+
+  /// Look up and SPS-deserialize a bootstrap map value.
+  template <typename T, typename SPSTagT>
+  Error getBootstrapMapValue(StringRef Key, std::optional<T> &Val) const {
+    return EPC->getBootstrapMapValue<T, SPSTagT>(Key, Val);
+  }
+
+  /// Returns the bootstrap symbol map.
+  const StringMap<ExecutorAddr> &getBootstrapSymbolsMap() const {
+    return EPC->getBootstrapSymbolsMap();
+  }
+
+  /// For each (ExecutorAddr&, StringRef) pair, looks up the string in the
+  /// bootstrap symbols map and writes its address to the ExecutorAddr if
+  /// found. If any symbol is not found then the function returns an error.
+  Error getBootstrapSymbols(
+      ArrayRef<std::pair<ExecutorAddr &, StringRef>> Pairs) const {
+    return EPC->getBootstrapSymbols(Pairs);
+  }
+
   /// Run a wrapper function in the executor.
   ///
   /// The wrapper function should be callable as: