[ORC] Thread Error/Expected through the RPC library.

This replaces use of std::error_code and ErrorOr in the ORC RPC support library
with Error and Expected. This required updating the OrcRemoteTarget API, Client,
and server code, as well as updating the Orc C API.

This patch also fixes several instances where Errors were dropped.

llvm-svn: 267457

1 files changed, 19 insertions, 7 deletions

diff --git a/llvm/include/llvm-c/OrcBindings.h b/llvm/include/llvm-c/OrcBindings.h
index 92e6ca310b1..4a2fa26abd4 100644
--- a/llvm/include/llvm-c/OrcBindings.h
+++ b/llvm/include/llvm-c/OrcBindings.h
@@ -37,6 +37,11 @@ typedef uint64_t (*LLVMOrcSymbolResolverFn)(const char *Name,
 typedef uint64_t (*LLVMOrcLazyCompileCallbackFn)(LLVMOrcJITStackRef JITStack,
                                                  void *CallbackCtx);
 
+typedef enum {
+  LLVMOrcErrSuccess = 0,
+  LLVMOrcErrGeneric
+} LLVMOrcErrorCode;
+
 /**
  * Create an ORC JIT stack.
  *
@@ -49,6 +54,14 @@ typedef uint64_t (*LLVMOrcLazyCompileCallbackFn)(LLVMOrcJITStackRef JITStack,
 LLVMOrcJITStackRef LLVMOrcCreateInstance(LLVMTargetMachineRef TM);
 
 /**
+ * Get the error message for the most recent error (if any).
+ *
+ * This message is owned by the ORC JIT Stack and will be freed when the stack
+ * is disposed of by LLVMOrcDisposeInstance.
+ */
+const char *LLVMOrcGetErrorMsg(LLVMOrcJITStackRef JITStack);
+
+/**
  * Mangle the given symbol.
  * Memory will be allocated for MangledSymbol to hold the result. The client
  */
@@ -58,7 +71,6 @@ void LLVMOrcGetMangledSymbol(LLVMOrcJITStackRef JITStack, char **MangledSymbol,
 /**
  * Dispose of a mangled symbol.
  */
-
 void LLVMOrcDisposeMangledSymbol(char *MangledSymbol);
 
 /**
@@ -72,16 +84,16 @@ LLVMOrcCreateLazyCompileCallback(LLVMOrcJITStackRef JITStack,
 /**
  * Create a named indirect call stub.
  */
-void LLVMOrcCreateIndirectStub(LLVMOrcJITStackRef JITStack,
-                               const char *StubName,
-                               LLVMOrcTargetAddress InitAddr);
+LLVMOrcErrorCode LLVMOrcCreateIndirectStub(LLVMOrcJITStackRef JITStack,
+                                           const char *StubName,
+                                           LLVMOrcTargetAddress InitAddr);
 
 /**
  * Set the pointer for the given indirect stub.
  */
-void LLVMOrcSetIndirectStubPointer(LLVMOrcJITStackRef JITStack,
-                                   const char *StubName,
-                                   LLVMOrcTargetAddress NewAddr);
+LLVMOrcErrorCode LLVMOrcSetIndirectStubPointer(LLVMOrcJITStackRef JITStack,
+                                               const char *StubName,
+                                               LLVMOrcTargetAddress NewAddr);
 
 /**
  * Add module to be eagerly compiled.