[ORC][ORC-RT] Reapply "Introduce ELF/*nix Platform and runtime..." with fixes.

This reapplies e256445bfff, which was reverted in 45ac5f54418 due to bot errors
(e.g. https://lab.llvm.org/buildbot/#/builders/112/builds/8599). The issue that
caused the bot failure was fixed in 2e6a4fce356.

1 files changed, 9 insertions, 0 deletions

diff --git a/llvm/tools/llvm-jitlink/llvm-jitlink.cpp b/llvm/tools/llvm-jitlink/llvm-jitlink.cpp
index ac2f378..dd97baf 100644
--- a/llvm/tools/llvm-jitlink/llvm-jitlink.cpp
+++ b/llvm/tools/llvm-jitlink/llvm-jitlink.cpp
@@ -16,6 +16,7 @@
 
 #include "llvm/BinaryFormat/Magic.h"
 #include "llvm/ExecutionEngine/Orc/DebugObjectManagerPlugin.h"
+#include "llvm/ExecutionEngine/Orc/ELFNixPlatform.h"
 #include "llvm/ExecutionEngine/Orc/EPCDebugObjectRegistrar.h"
 #include "llvm/ExecutionEngine/Orc/EPCDynamicLibrarySearchGenerator.h"
 #include "llvm/ExecutionEngine/Orc/EPCEHFrameRegistrar.h"
@@ -927,6 +928,14 @@ Session::Session(std::unique_ptr<ExecutorProcessControl> EPC, Error &Err)
       Err = P.takeError();
       return;
     }
+  } else if (TT.isOSBinFormatELF() && !OrcRuntime.empty()) {
+    if (auto P =
+            ELFNixPlatform::Create(ES, ObjLayer, *MainJD, OrcRuntime.c_str()))
+      ES.setPlatform(std::move(*P));
+    else {
+      Err = P.takeError();
+      return;
+    }
   } else if (!NoExec && !TT.isOSWindows() && !TT.isOSBinFormatMachO()) {
     ObjLayer.addPlugin(std::make_unique<EHFrameRegistrationPlugin>(
         ES, ExitOnErr(EPCEHFrameRegistrar::Create(this->ES))));