[llvm] [C-API] LLVMOrcCreateObjectLinkingLayerWithInProcessMemoryManager (PR #169862)

[Thomas Munro via llvm-commits]

https://github.com/macdice updated https://github.com/llvm/llvm-project/pull/169862

>From ab1a9b50978971d8284c7ba4d88f955d2ce4c90d Mon Sep 17 00:00:00 2001
From: Thomas Munro <thomas.munro at gmail.com>
Date: Thu, 27 Nov 2025 23:40:58 +1300
Subject: [PATCH 1/2] [C-API]
 LLVMOrcCreateObjectLinkingLayerWithInProcessMemoryManager

Allow C programs to use JITLink instead of RuntimeDyld.  Modeled on
LLVMOrcCreateRTDyldObjectLinkingLayerWithSectionMemoryManager except
that it has to deal with failure to create InProcessMemoryManager.  In
that case it returns nullptr.
---
 llvm/include/llvm-c/OrcEE.h                     |  9 +++++++++
 llvm/lib/ExecutionEngine/Orc/OrcV2CBindings.cpp | 14 ++++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/llvm/include/llvm-c/OrcEE.h b/llvm/include/llvm-c/OrcEE.h
index fcec3a47186ac..0e79f23de3ff3 100644
--- a/llvm/include/llvm-c/OrcEE.h
+++ b/llvm/include/llvm-c/OrcEE.h
@@ -43,6 +43,15 @@ typedef void (*LLVMMemoryManagerNotifyTerminatingCallback)(void *CtxCtx);
  * @{
  */
 
+/**
+ * Create a ObjectLinkingLayer instance using the standard JITLink
+ * InProcessMemoryManager for memory management.  Result is NULL on failure to
+ * determine system page size.
+ */
+LLVMOrcObjectLayerRef
+LLVMOrcCreateObjectLinkingLayerWithInProcessMemoryManager(
+    LLVMOrcExecutionSessionRef ES);
+
 /**
  * Create a RTDyldObjectLinkingLayer instance using the standard
  * SectionMemoryManager for memory management.
diff --git a/llvm/lib/ExecutionEngine/Orc/OrcV2CBindings.cpp b/llvm/lib/ExecutionEngine/Orc/OrcV2CBindings.cpp
index cdde733b3a817..ee676a2197d43 100644
--- a/llvm/lib/ExecutionEngine/Orc/OrcV2CBindings.cpp
+++ b/llvm/lib/ExecutionEngine/Orc/OrcV2CBindings.cpp
@@ -11,9 +11,11 @@
 #include "llvm-c/OrcEE.h"
 #include "llvm-c/TargetMachine.h"
 
+#include "llvm/ExecutionEngine/JITLink/JITLinkMemoryManager.h"
 #include "llvm/ExecutionEngine/Orc/AbsoluteSymbols.h"
 #include "llvm/ExecutionEngine/Orc/JITTargetMachineBuilder.h"
 #include "llvm/ExecutionEngine/Orc/LLJIT.h"
+#include "llvm/ExecutionEngine/Orc/ObjectLinkingLayer.h"
 #include "llvm/ExecutionEngine/Orc/ObjectTransformLayer.h"
 #include "llvm/ExecutionEngine/Orc/RTDyldObjectLinkingLayer.h"
 #include "llvm/ExecutionEngine/SectionMemoryManager.h"
@@ -1017,6 +1019,18 @@ LLVMOrcLLJITGetObjTransformLayer(LLVMOrcLLJITRef J) {
   return wrap(&unwrap(J)->getObjTransformLayer());
 }
 
+LLVMOrcObjectLayerRef
+LLVMOrcCreateObjectLinkingLayerWithInProcessMemoryManager(
+    LLVMOrcExecutionSessionRef ES) {
+  assert(ES && "ES must not be null");
+  auto mm = jitlink::InProcessMemoryManager::Create();
+  if (!mm) {
+    unwrap(ES)->reportError(mm.takeError());
+    return nullptr;
+  }
+  return wrap(new ObjectLinkingLayer(*unwrap(ES), std::move(*mm)));
+}
+
 LLVMOrcObjectLayerRef
 LLVMOrcCreateRTDyldObjectLinkingLayerWithSectionMemoryManager(
     LLVMOrcExecutionSessionRef ES) {

>From 8d6a1539c4b5647052e4dba24370978e106012e8 Mon Sep 17 00:00:00 2001
From: Thomas Munro <thomas.munro at gmail.com>
Date: Mon, 1 Dec 2025 21:38:06 +1300
Subject: [PATCH 2/2] amend! [C-API]
 LLVMOrcCreateObjectLinkingLayerWithInProcessMemoryManager

[C-API] LLVMOrcCreateObjectLinkingLayerWithInProcessMemoryManager (#169862)

Allow C programs to use JITLink instead of RuntimeDyld.  Modeled on
LLVMOrcCreateRTDyldObjectLinkingLayerWithSectionMemoryManager except
that it has to deal with failure to create InProcessMemoryManager.
---
 llvm/include/llvm-c/OrcEE.h                     |  7 +++----
 llvm/lib/ExecutionEngine/Orc/OrcV2CBindings.cpp | 16 ++++++++--------
 2 files changed, 11 insertions(+), 12 deletions(-)

diff --git a/llvm/include/llvm-c/OrcEE.h b/llvm/include/llvm-c/OrcEE.h
index 0e79f23de3ff3..fd044ea659456 100644
--- a/llvm/include/llvm-c/OrcEE.h
+++ b/llvm/include/llvm-c/OrcEE.h
@@ -45,12 +45,11 @@ typedef void (*LLVMMemoryManagerNotifyTerminatingCallback)(void *CtxCtx);
 
 /**
  * Create a ObjectLinkingLayer instance using the standard JITLink
- * InProcessMemoryManager for memory management.  Result is NULL on failure to
- * determine system page size.
+ * InProcessMemoryManager for memory management.
  */
-LLVMOrcObjectLayerRef
+LLVM_C_ABI LLVMErrorRef
 LLVMOrcCreateObjectLinkingLayerWithInProcessMemoryManager(
-    LLVMOrcExecutionSessionRef ES);
+    LLVMOrcObjectLayerRef *Result, LLVMOrcExecutionSessionRef ES);
 
 /**
  * Create a RTDyldObjectLinkingLayer instance using the standard
diff --git a/llvm/lib/ExecutionEngine/Orc/OrcV2CBindings.cpp b/llvm/lib/ExecutionEngine/Orc/OrcV2CBindings.cpp
index ee676a2197d43..cfd062068a7d6 100644
--- a/llvm/lib/ExecutionEngine/Orc/OrcV2CBindings.cpp
+++ b/llvm/lib/ExecutionEngine/Orc/OrcV2CBindings.cpp
@@ -1019,16 +1019,16 @@ LLVMOrcLLJITGetObjTransformLayer(LLVMOrcLLJITRef J) {
   return wrap(&unwrap(J)->getObjTransformLayer());
 }
 
-LLVMOrcObjectLayerRef
-LLVMOrcCreateObjectLinkingLayerWithInProcessMemoryManager(
-    LLVMOrcExecutionSessionRef ES) {
+LLVMErrorRef LLVMOrcCreateObjectLinkingLayerWithInProcessMemoryManager(
+    LLVMOrcObjectLayerRef *Result, LLVMOrcExecutionSessionRef ES) {
+  assert(Result && "Result must not be null");
   assert(ES && "ES must not be null");
-  auto mm = jitlink::InProcessMemoryManager::Create();
-  if (!mm) {
-    unwrap(ES)->reportError(mm.takeError());
-    return nullptr;
+  auto MM = jitlink::InProcessMemoryManager::Create();
+  if (!MM) {
+    return wrap(MM.takeError());
   }
-  return wrap(new ObjectLinkingLayer(*unwrap(ES), std::move(*mm)));
+  *Result = wrap(new ObjectLinkingLayer(*unwrap(ES), std::move(*MM)));
+  return LLVMErrorSuccess;
 }
 
 LLVMOrcObjectLayerRef