metal : create autorelease pool during library build (#4970)

* metal : create autorelease pool during library build

ggml-ci

* test : simplify

ggml-ci

2 files changed, 29 insertions, 0 deletions

diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 7c932240..d7aaab84 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -49,6 +49,7 @@ llama_build_and_test_executable(test-llama-grammar.cpp)
 llama_build_and_test_executable(test-grad0.cpp)
 # llama_build_and_test_executable(test-opt.cpp) # SLOW
 llama_build_and_test_executable(test-backend-ops.cpp)
+llama_build_and_test_executable(test-autorelease.cpp)
 
 llama_build_and_test_executable(test-rope.cpp)
 
diff --git a/tests/test-autorelease.cpp b/tests/test-autorelease.cpp
new file mode 100644
index 00000000..289c6ba6
--- /dev/null
+++ b/tests/test-autorelease.cpp
@@ -0,0 +1,28 @@
+// ref: https://github.com/ggerganov/llama.cpp/issues/4952#issuecomment-1892864763
+
+#include <cstdio>
+#include <string>
+#include <thread>
+
+#include "llama.h"
+
+// This creates a new context inside a pthread and then tries to exit cleanly.
+int main(int argc, char ** argv) {
+    if (argc < 2) {
+        printf("Usage: %s model.gguf\n", argv[0]);
+        return 0; // intentionally return success
+    }
+
+    const std::string fname = argv[1];
+
+    std::thread([&fname]() {
+        llama_backend_init(false);
+        auto * model = llama_load_model_from_file(fname.c_str(), llama_model_default_params());
+        auto * ctx = llama_new_context_with_model(model, llama_context_default_params());
+        llama_free(ctx);
+        llama_free_model(model);
+        llama_backend_free();
+    }).join();
+
+    return 0;
+}