Exporting jl_gc_disable_counter

Author: udesou

src/gc.h

@@ -83,7 +83,7 @@ extern const size_t max_collect_interval;
 extern size_t last_long_collect_interval;
 extern size_t total_mem;
 extern memsize_t max_total_memory;
-extern _Atomic(uint32_t) jl_gc_disable_counter;
+extern JL_DLLEXPORT _Atomic(uint32_t) jl_gc_disable_counter;
 extern jl_mutex_t heapsnapshot_lock;
 extern uint64_t finalizer_rngState[];
 extern int gc_n_threads;

src/julia_internal.h

@@ -936,7 +936,7 @@ STATIC_INLINE int jl_addr_is_safepoint(uintptr_t addr)
     return addr >= safepoint_addr && addr < safepoint_addr + jl_page_size * 3;
 }
 extern _Atomic(uint32_t) jl_gc_running;
-extern _Atomic(uint32_t) jl_gc_disable_counter;
+extern JL_DLLEXPORT _Atomic(uint32_t) jl_gc_disable_counter;
 // All the functions are safe to be called from within a signal handler
 // provided that the thread will not be interrupted by another asynchronous
 // signal.

src/mmtk-gc.c

@@ -219,7 +219,7 @@ JL_DLLEXPORT void jl_gc_collect(jl_gc_collection_t collection)
 {
     jl_task_t *ct = jl_current_task;
     jl_ptls_t ptls = ct->ptls;
-    if (jl_atomic_load_relaxed(&jl_gc_disable_counter)) {
+    if (jl_atomic_load_acquire(&jl_gc_disable_counter)) {
         size_t localbytes = jl_atomic_load_relaxed(&ptls->gc_num.allocd) + gc_num.interval;
         jl_atomic_store_relaxed(&ptls->gc_num.allocd, -(int64_t)gc_num.interval);
         static_assert(sizeof(_Atomic(uint64_t)) == sizeof(gc_num.deferred_alloc), "");