chore: import upstream snapshot with attribution

libnd4j/include/execution/cpu/LaunchContext.cpp

@@ -0,0 +1,119 @@
+/* ******************************************************************************
+ *
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Apache License, Version 2.0 which is available at
+ * https://www.apache.org/licenses/LICENSE-2.0.
+ *
+ *  See the NOTICE file distributed with this work for additional
+ *  information regarding copyright ownership.
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ ******************************************************************************/
+
+//
+// Created by raver119 on 30.11.17.
+//
+#include <exceptions/cuda_exception.h>
+#include <execution/AffinityManager.h>
+#include <execution/LaunchContext.h>
+#include <helpers/logger.h>
+#include <thread>
+
+// NOTE: Removed thread_local to fix "cannot allocate memory in static TLS block" error
+// when JavaCPP loads library via dlopen(). This error occurs because:
+// 1. dlopen() loads the library at runtime (not at program startup)
+// 2. thread_local variables require space in the static TLS block
+// 3. The static TLS block has limited size and cannot be extended after program start
+// 4. When loaded via dlopen(), the library's TLS requirements must fit in remaining space
+// 5. If sanitizers or lifecycle tracking are enabled, TLS space may already be exhausted
+//
+// iOS/Apple/Android builds already avoid thread_local for similar reasons.
+// For CPU builds, making this a non-thread-local global is acceptable because:
+// - Each LaunchContext instance maintains its own thread-safe state
+// - The global contextBuffers is used as a default/fallback buffer pool
+// - Proper synchronization is handled at the LaunchContext level
+sd::ContextBuffers contextBuffers = sd::ContextBuffers();
+
+#if HAVE_ONEDNN
+#include <dnnl.hpp>
+#endif
+
+namespace sd {
+
+LaunchContext::~LaunchContext() {
+#if HAVE_ONEDNN
+  // Intentionally NOT deleting _engine to avoid use-after-free during shutdown
+  // The LaunchContext objects are kept alive in a function-local static vector (contexts())
+  // to survive JVM shutdown. Deleting _engine here causes crashes because
+  // OneDNN's static cleanup may have already run, making the engine invalid.
+  // This is safe because LaunchContext instances are never destroyed during
+  // normal operation - only during process exit when memory cleanup doesn't matter.
+  // delete reinterpret_cast<dnnl::engine*>(_engine);
+#endif
+}
+
+// Use pointer to prevent static destructor from running.
+// The vector is intentionally leaked to avoid crashes during shutdown when:
+// 1. An exception is thrown that references LaunchContext
+// 2. JVM shuts down and runs static destructors
+// 3. The vector's destructor tries to destroy stored contexts while they're still in use
+// This is safe because LaunchContexts are only created during initialization and
+// process exit cleans up all memory anyway.
+std::vector<LaunchContext*>& LaunchContext::contexts() {
+  static std::vector<LaunchContext*>* _contexts = new std::vector<LaunchContext*>();
+  return *_contexts;
+}
+
+SD_MAP_IMPL<int, std::mutex*> LaunchContext::_deviceMutexes;
+std::mutex LaunchContext::_mutex;
+
+////////////////////////////////////////////////////////////////////////
+LaunchContext::LaunchContext() {
+  // default constructor, just to make clang/ranlib happy
+  _workspace = nullptr;
+  _deviceID = 0;
+#if HAVE_ONEDNN
+  _engine = new dnnl::engine(dnnl::engine::kind::cpu, 0);
+#endif
+}
+
+LaunchContext::LaunchContext(sd::Pointer cudaStream, sd::Pointer reductionPointer, sd::Pointer scalarPointer,
+                             sd::Pointer allocationPointer) {}
+
+static std::mutex _lock;
+
+LaunchContext* LaunchContext::defaultContext() {
+  {
+    // synchronous block goes here
+    std::lock_guard<std::mutex> lock(_lock);
+    // TODO: we need it to be device-aware, but only once we add NUMA support for cpu
+    if (LaunchContext::contexts().empty())
+      LaunchContext::contexts().emplace_back(new LaunchContext());
+  }
+
+  // return context for current device
+  return LaunchContext::contexts().at(0);
+}
+
+std::mutex* LaunchContext::deviceMutex() { return &_mutex; }
+
+void LaunchContext::swapContextBuffers(ContextBuffers& buffers) {
+  //
+}
+
+bool LaunchContext::isInitialized() { return true; }
+
+void LaunchContext::releaseBuffers() {
+  //
+}
+
+sd::ErrorReference* LaunchContext::errorReference() { return contextBuffers.errorReference(); }
+
+void* LaunchContext::engine() { return _engine; }
+}  // namespace sd