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//===- OrcV2CBindingsDumpObjects.c - Dump JIT'd objects to disk via C API -===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// To run the demo build 'OrcV2CBindingsDumpObjects', then run the built
// program. It will execute as for OrcV2CBindingsBasicUsage, but will write
// a single JIT'd object out to the working directory.
//
// Try experimenting with the DumpDir and IdentifierOverride arguments to
// LLVMOrcCreateDumpObjects.
//
//===----------------------------------------------------------------------===//
#include "llvm-c/Core.h"
#include "llvm-c/Error.h"
#include "llvm-c/Initialization.h"
#include "llvm-c/LLJIT.h"
#include "llvm-c/Support.h"
#include "llvm-c/Target.h"
#include <stdio.h>
int handleError(LLVMErrorRef Err) {
char *ErrMsg = LLVMGetErrorMessage(Err);
fprintf(stderr, "Error: %s\n", ErrMsg);
LLVMDisposeErrorMessage(ErrMsg);
return 1;
}
LLVMOrcThreadSafeModuleRef createDemoModule() {
LLVMOrcThreadSafeContextRef TSCtx = LLVMOrcCreateNewThreadSafeContext();
LLVMContextRef Ctx = LLVMOrcThreadSafeContextGetContext(TSCtx);
LLVMModuleRef M = LLVMModuleCreateWithNameInContext("demo", Ctx);
LLVMTypeRef ParamTypes[] = {LLVMInt32Type(), LLVMInt32Type()};
LLVMTypeRef SumFunctionType =
LLVMFunctionType(LLVMInt32Type(), ParamTypes, 2, 0);
LLVMValueRef SumFunction = LLVMAddFunction(M, "sum", SumFunctionType);
LLVMBasicBlockRef EntryBB = LLVMAppendBasicBlock(SumFunction, "entry");
LLVMBuilderRef Builder = LLVMCreateBuilder();
LLVMPositionBuilderAtEnd(Builder, EntryBB);
LLVMValueRef SumArg0 = LLVMGetParam(SumFunction, 0);
LLVMValueRef SumArg1 = LLVMGetParam(SumFunction, 1);
LLVMValueRef Result = LLVMBuildAdd(Builder, SumArg0, SumArg1, "result");
LLVMBuildRet(Builder, Result);
LLVMOrcThreadSafeModuleRef TSM = LLVMOrcCreateNewThreadSafeModule(M, TSCtx);
LLVMOrcDisposeThreadSafeContext(TSCtx);
return TSM;
}
LLVMErrorRef dumpObjectsTransform(void *Ctx, LLVMMemoryBufferRef *ObjInOut) {
LLVMOrcDumpObjectsRef DumpObjects = *(LLVMOrcDumpObjectsRef *)Ctx;
return LLVMOrcDumpObjects_CallOperator(DumpObjects, ObjInOut);
}
int main(int argc, char *argv[]) {
int MainResult = 0;
LLVMParseCommandLineOptions(argc, (const char **)argv, "");
LLVMInitializeCore(LLVMGetGlobalPassRegistry());
LLVMInitializeNativeTarget();
LLVMInitializeNativeAsmPrinter();
// Create a DumpObjects instance to use when dumping objects to disk.
LLVMOrcDumpObjectsRef DumpObjects = LLVMOrcCreateDumpObjects("", "");
// Create the JIT instance.
LLVMOrcLLJITRef J;
{
LLVMErrorRef Err;
if ((Err = LLVMOrcCreateLLJIT(&J, 0))) {
MainResult = handleError(Err);
goto llvm_shutdown;
}
}
// Set an object transform to call our DumpObjects instance for every
// JIT'd object.
LLVMOrcObjectTransformLayerSetTransform(LLVMOrcLLJITGetObjTransformLayer(J),
dumpObjectsTransform, &DumpObjects);
// Create our demo module.
LLVMOrcThreadSafeModuleRef TSM = createDemoModule();
// Add our demo module to the JIT.
{
LLVMOrcJITDylibRef MainJD = LLVMOrcLLJITGetMainJITDylib(J);
LLVMErrorRef Err;
if ((Err = LLVMOrcLLJITAddLLVMIRModule(J, MainJD, TSM))) {
// If adding the ThreadSafeModule fails then we need to clean it up
// ourselves. If adding it succeeds the JIT will manage the memory.
LLVMOrcDisposeThreadSafeModule(TSM);
MainResult = handleError(Err);
goto jit_cleanup;
}
}
// Look up the address of our demo entry point.
LLVMOrcJITTargetAddress SumAddr;
{
LLVMErrorRef Err;
if ((Err = LLVMOrcLLJITLookup(J, &SumAddr, "sum"))) {
MainResult = handleError(Err);
goto jit_cleanup;
}
}
// If we made it here then everything succeeded. Execute our JIT'd code.
int32_t (*Sum)(int32_t, int32_t) = (int32_t(*)(int32_t, int32_t))SumAddr;
int32_t Result = Sum(1, 2);
// Print the result.
printf("1 + 2 = %i\n", Result);
jit_cleanup:
// Destroy our JIT instance.
{
LLVMErrorRef Err;
if ((Err = LLVMOrcDisposeLLJIT(J))) {
int NewFailureResult = handleError(Err);
if (MainResult == 0)
MainResult = NewFailureResult;
}
}
llvm_shutdown:
// Destroy our DumpObjects instance.
LLVMOrcDisposeDumpObjects(DumpObjects);
// Shut down LLVM.
LLVMShutdown();
return MainResult;
}
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