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Copy pathlibjvm_loader.cpp
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110 lines (92 loc) · 3.48 KB
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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
#include "util/libjvm_loader.h"
#include <dlfcn.h>
#include <cstdlib>
#include <filesystem>
#include <mutex>
#include "common/status.h"
#include "jni.h"
#include "jni_md.h"
_JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM** vm_buf, jsize bufLen,
jsize* numVMs) {
return doris::LibJVMLoader::JNI_GetCreatedJavaVMs(vm_buf, bufLen, numVMs);
}
_JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM** pvm, void** penv, void* args) {
return doris::LibJVMLoader::JNI_CreateJavaVM(pvm, penv, args);
}
namespace {
#ifndef __APPLE__
#define LIBJVM_SO "libjvm.so"
#else
#define LIBJVM_SO "libjvm.dylib"
#endif
template <typename T>
doris::Status resolve_symbol(T& pointer, void* handle, const char* symbol) {
pointer = reinterpret_cast<T>(dlsym(handle, symbol));
return (pointer != nullptr)
? doris::Status::OK()
: doris::Status::RuntimeError("Failed to resolve the symbol {}", symbol);
}
} // namespace
namespace doris {
LibJVMLoader::JNI_GetCreatedJavaVMsPointer LibJVMLoader::JNI_GetCreatedJavaVMs = nullptr;
LibJVMLoader::JNI_CreateJavaVMPointer LibJVMLoader::JNI_CreateJavaVM = nullptr;
LibJVMLoader& LibJVMLoader::instance() {
static std::once_flag find_library;
static std::string library;
std::call_once(find_library, []() {
const auto* java_home = getenv("JAVA_HOME");
if (!java_home) {
return;
}
std::string path(java_home);
for (const auto& entry : std::filesystem::recursive_directory_iterator(path)) {
if (entry.path().filename() == LIBJVM_SO) {
library = entry.path().string();
break;
}
}
});
static LibJVMLoader loader(library);
return loader;
}
Status LibJVMLoader::load() {
if (_library.empty()) {
return Status::RuntimeError("Failed to find the library {}.", LIBJVM_SO);
}
static std::once_flag resolve_symbols;
static Status status;
std::call_once(resolve_symbols, [this]() {
_handle = std::unique_ptr<void, void (*)(void*)>(dlopen(_library.c_str(), RTLD_LAZY),
[](void* handle) { dlclose(handle); });
if (!_handle) {
status = Status::RuntimeError(dlerror());
return;
}
if (status = resolve_symbol(JNI_GetCreatedJavaVMs, _handle.get(), "JNI_GetCreatedJavaVMs");
!status.ok()) {
return;
}
if (status = resolve_symbol(JNI_CreateJavaVM, _handle.get(), "JNI_CreateJavaVM");
!status.ok()) {
return;
}
});
return status;
}
} // namespace doris