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‎CoreCLRHost.cpp‎

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/*
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* Copyright (c) Hubert Jarosz. All rights reserved.
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* Licensed under the MIT license. See LICENSE file in the project root for full license information.
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*/
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#include <iostream>
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#include <string.h>
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#include "CoreCLRHost.hpp"
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#include "utils.hpp"
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#include "Sample1.h"
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int runFromEntryPoint(
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std::string currentExeAbsolutePath,
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std::string clrFilesAbsolutePath,
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std::string managedAssemblyAbsoluteDir,
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std::string assemblyName,
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std::string entryPointType,
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std::string entryPointName)
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{
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std::cout<<"currentExeAbsolutePath="<<currentExeAbsolutePath<<std::endl<<"clrFilesAbsolutePath="<<clrFilesAbsolutePath<<std::endl<<"managedAssemblyAbsoluteDir="<<managedAssemblyAbsoluteDir<<std::endl<<"assemblyName="<<assemblyName<<std::endl;
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std::cout<<"entryPointType="<<entryPointType<<std::endl<<"entryPointName="<<entryPointName<<std::endl;
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std::string coreClrDllPath = clrFilesAbsolutePath + "/" + coreClrDll;
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if ( coreClrDllPath.size() >= PATH_MAX ) {
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std::cerr << "Path to libcoreclr.so too long!" << std::endl;
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return -1;
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}
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std::string nativeDllSearchDirs = managedAssemblyAbsoluteDir + ":" + clrFilesAbsolutePath;
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std::string tpaList;
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AddFilesFromDirectoryToTpaList( clrFilesAbsolutePath, tpaList );
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std::cout<<"line 32"<<std::endl;
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auto dl = dynamicLinker::dynamicLinker::make_new( coreClrDllPath );
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auto coreclr_initialize = dl->getFunction<coreclrInitializeFunction>("coreclr_initialize");
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auto coreclr_shutdown = dl->getFunction<coreclrShutdownFunction>("coreclr_shutdown");
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auto coreclr_create_delegate = dl->getFunction<coreclrCreateDelegateFunction>("coreclr_create_delegate");
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std::cout<<"line 37"<<std::endl;
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try {
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dl->open();
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coreclr_initialize.init();
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coreclr_shutdown.init();
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coreclr_create_delegate.init();
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} catch ( dynamicLinker::openException e ) {
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std::cerr << "Cannot find " << coreClrDll << "Path that was searched: "
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<< coreClrDllPath << std::endl;
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std::cerr << e.what() << std::endl;
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return -1;
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} catch ( dynamicLinker::symbolException e ) {
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std::cerr << "Probably your libcoreclr is broken or too old." << std::endl;
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std::cerr << e.what() << std::endl;
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return -1;
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} catch ( dynamicLinker::dynamicLinkerException e ) {
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std::cerr << e.what() << std::endl;
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return -1;
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}
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const char *propertyKeys[] = {
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"TRUSTED_PLATFORM_ASSEMBLIES",
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"APP_PATHS",
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"APP_NI_PATHS",
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"NATIVE_DLL_SEARCH_DIRECTORIES",
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"AppDomainCompatSwitch"
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};
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const char *propertyValues[] = {
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tpaList.c_str(),
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managedAssemblyAbsoluteDir.c_str(),
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managedAssemblyAbsoluteDir.c_str(),
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nativeDllSearchDirs.c_str(),
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"UseLatestBehaviorWhenTFMNotSpecified"
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};
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void* hostHandle = NULL;
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unsigned int domainId = 0;
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int status = -1;
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// initialize coreclr
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try {
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status = coreclr_initialize (
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currentExeAbsolutePath.c_str(),
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"simpleCoreCLRHost",
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sizeof(propertyKeys) / sizeof(propertyKeys[0]),
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propertyKeys,
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propertyValues,
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&hostHandle,
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&domainId
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);
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} catch ( dynamicLinker::dynamicLinkerException e ) {
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std::cerr << e.what() << std::endl;
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return -1;
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}
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if ( status < 0 ) {
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std::cerr << "ERROR! coreclr_initialize status: 0x" << std::hex << status << std::endl;
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return -1;
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}
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// Fancy modern C++ code. You can also just use void *.
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auto no_del = []( auto x ) { (void)(x); };
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auto csharp_runIt = std::unique_ptr<csharp_runIt_t, decltype(no_del)>(nullptr, no_del);
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try {
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// create delegate to our entry point
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status = coreclr_create_delegate (
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hostHandle,
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domainId,
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assemblyName.c_str(),
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entryPointType.c_str(),
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entryPointName.c_str(),
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reinterpret_cast<void**>(&csharp_runIt)
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);
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} catch ( dynamicLinker::dynamicLinkerException e ) {
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std::cerr << e.what() << std::endl;
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return -1;
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}
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if ( status < 0 ) {
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std::cerr << "ERROR! coreclr_create_delegate status: 0x" << std::hex << status << std::endl;
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return -1;
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}
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myClass tmp = myClass();
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tmp.question();
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/*
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* If arguments are in in different order then second arg is 0 in C#.
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* probably something with padding/offset/ptr byte size
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*/
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(*csharp_runIt)( tmp, std::mem_fun_ref(&myClass::print) );
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try {
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status = coreclr_shutdown ( hostHandle, domainId );
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} catch ( dynamicLinker::dynamicLinkerException e ) {
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std::cerr << e.what() << std::endl;
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return -1;
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}
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if ( status < 0 ) {
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std::cerr << "ERROR! coreclr_shutdown status: 0x" << std::hex << status << std::endl;
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return -1;
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}
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return 0;
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}
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JNIEXPORT jint JNICALL Java_Sample1_intMethod
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(JNIEnv *env, jobject obj, jint num){
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return num * num;
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}
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JNIEXPORT jboolean JNICALL Java_Sample1_booleanMethod
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(JNIEnv *env, jobject obj, jboolean boolean){
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return !boolean;
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}
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JNIEXPORT jstring JNICALL Java_Sample1_stringMethod
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(JNIEnv *env, jobject obj, jstring string){
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const char *str = env->GetStringUTFChars(string,0);
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char cap[128];
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strcpy(cap,str);
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env->ReleaseStringUTFChars(string , str);
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return env->NewStringUTF(cap);
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}
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JNIEXPORT jint JNICALL Java_Sample1_intArrayMethod
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(JNIEnv *env, jobject obj, jintArray array){
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int i, sum=0;
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jsize len = env->GetArrayLength(array);
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jint *body = env ->GetIntArrayElements(array,0);
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for (i=0;i<len;i++)
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{
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sum+=body[i];
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}
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env->ReleaseIntArrayElements(array, body,0);
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return sum;
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}
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JNIEXPORT jint JNICALL Java_Sample1_coreClrHost(JNIEnv *env, jobject obj, jstring string)
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{
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std::cout<<"haha"<<std::endl;
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const char *str = env->GetStringUTFChars(string,0);
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char cap[128];
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strcpy(cap,str);
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std::string dllpath(cap); //"./Managed.dll";
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env->ReleaseStringUTFChars(string , str);
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// std::string dllpath = env->NewStringUTF(cap);
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std::string cwd = SCCH_fs::current_path();
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cwd += "/";
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std::cout<<"dll path :"<<dllpath<<std::endl;
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std::string assemblyName(dllpath);
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std::string assemblyDir(assemblyName);
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if( !assemblyName.size() ) {
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std::cerr << "ERROR: Bad ASSEMBLY_PATH !" << std::endl;
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return 0;
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}
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size_t find = assemblyName.rfind('/');
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if( find == std::string::npos )
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find = 0;
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assemblyName = assemblyName.substr( find+1, assemblyName.size() );
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if( assemblyName.size() < 5 ||
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assemblyName.substr( assemblyName.size()-4,
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assemblyName.size()) != ".dll" ) {
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std::cerr << "ERROR: Assembly is not .dll !" << std::endl;
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return 0;
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}
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assemblyName = assemblyName.substr( 0, assemblyName.size()-4 );
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assemblyDir.erase(find); // get dir of assembly
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assemblyDir = cwd + assemblyDir;
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int exitCode = runFromEntryPoint(
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cwd+std::string("./tar.so"), // absolute path to this exe
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std::string("/usr/share/dotnet/shared/Microsoft.NETCore.App/2.0.0-preview1-002111-00/"), // absolute path to coreCLR DLLs
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assemblyDir, // absolute path to DLL to run
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assemblyName,
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std::string("Managed"),
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std::string("runIt"));
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if ( exitCode < 0 )
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std::cout << "Exit Code: " << exitCode << std::endl;
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return 1;
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}
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int main( int argc, char* argv[] ) { return 0;}

‎CoreCLRHost.hpp‎

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/*
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* Copyright (c) Hubert Jarosz. All rights reserved.
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* Licensed under the MIT license. See LICENSE file in the project root for full license information.
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*/
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//#pragma once
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//#if not defined (__unix__) && not defined(__unix) && not defined (unix) && ( (not defined (__APPLE__) || not defined (__MACH__)) )
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// #error THIS SOFTWARE IS ONLY FOR UNIX-LIKE SYSTEMS!
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//#endif
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#include <functional>
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#include <iostream>
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#include "dynamicLinker/dynamicLinker.hpp"
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// getcwd on Linux
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#include <unistd.h>
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// PATH_MAX on Linux
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#include <limits.h>
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#if not defined PATH_MAX
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#warning Is this GNU/Hurd? Then this code could occupy a lot of memory.
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#include <stdio.h>
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#define PATH_MAX FILENAME_MAX
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#endif
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//#if defined(__APPLE__)
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// std::string coreClrDll = "libcoreclr.dylib";
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//#else
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std::string coreClrDll = "libcoreclr.so";
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//#endif
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class myClass {
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private:
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int value;
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public:
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void question() { value = 42; }
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void print() { std::cout << "Value: " << value << std::endl; }
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};
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typedef void (csharp_runIt_t)( myClass&, std::mem_fun_ref_t<void, myClass> );

‎Makefile‎

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OS_NAME = $(shell uname -s)
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ifeq ($(OS_NAME), Darwin)
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CXX = g++-6
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ifeq (, $(shell which $(CPP)))
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$(error "$(CPP) not found! You need to install gcc 6 to build this!")
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endif
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else
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CXX = g++
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endif
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CXXFLAGS = -Wall -std=c++14 -m64 -fPIC
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LDLIBS = -ldl -lstdc++fs
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JAVALIB= -I/usr/lib/jvm/java-9-openjdk-amd64/include -I/usr/lib/jvm/java-9-openjdk-amd64/include/linux/
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.PHONY: all clean
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all: tar.so Makefile
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tar.so: CoreCLRHost.cpp CoreCLRHost.hpp utils.hpp Sample1.h Makefile
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git -C dynamicLinker pull || git clone https://github.com/Marqin/dynamicLinker
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make -C dynamicLinker CXX=$(CXX)
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$(CXX) $(JAVALIB) $(CXXFLAGS) CoreCLRHost.cpp -shared -o tar.so -LdynamicLinker/ -ldynamicLinker $(LDLIBS)
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clean:
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rm -rf tar.so
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sh -c "stat dynamicLinker/ &> /dev/null && make -C dynamicLinker clean" || true
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distclean: clean
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rm -rf dynamicLinker/

‎Managed.cs‎

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/*
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* Copyright (c) Hubert Jarosz. All rights reserved.
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* Licensed under the MIT license. See LICENSE file in the project root for full license information.
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*/
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using System;
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using System.Runtime.InteropServices;
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public class Managed {
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[UnmanagedFunctionPointer(CallingConvention.ThisCall)]
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unsafe delegate void myDelegate( IntPtr thisptr );
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public static unsafe void runIt( IntPtr thisptr, IntPtr mem_fun ) {
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Console.WriteLine("Here's C# code:");
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myDelegate fun = (myDelegate) Marshal.GetDelegateForFunctionPointer( mem_fun, typeof(myDelegate) );
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fun(thisptr); // first argument of member functions in C++ is "this", but it's hidden from us :-)
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}
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}

‎Sample1.cpp‎

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#include "Sample1.h"
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#include <string.h>
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#include <iostream>
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JNIEXPORT jint JNICALL Java_Sample1_intMethod
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(JNIEnv *env, jobject obj, jint num){
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return num * num;
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}
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JNIEXPORT jboolean JNICALL Java_Sample1_booleanMethod
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(JNIEnv *env, jobject obj, jboolean boolean){
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return !boolean;
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}
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JNIEXPORT jstring JNICALL Java_Sample1_stringMethod
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(JNIEnv *env, jobject obj, jstring string){
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const char *str = env->GetStringUTFChars(string,0);
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char cap[128];
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strcpy(cap,str);
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env->ReleaseStringUTFChars(string , str);
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return env->NewStringUTF(cap);
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}
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JNIEXPORT jint JNICALL Java_Sample1_intArrayMethod
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(JNIEnv *env, jobject obj, jintArray array){
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int i, sum=0;
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jsize len = env->GetArrayLength(array);
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jint *body = env ->GetIntArrayElements(array,0);
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for (i=0;i<len;i++)
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{
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sum+=body[i];
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}
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env->ReleaseIntArrayElements(array, body,0);
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return sum;
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}

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