Fix race condition with -use-separate-modules due to type determination

1 files changed, 6 insertions, 0 deletions

diff --git a/src/llvm_backend_general.cpp b/src/llvm_backend_general.cpp
index aa887418f..7d2f574fe 100644
--- a/src/llvm_backend_general.cpp
+++ b/src/llvm_backend_general.cpp
@@ -1498,6 +1498,9 @@ gb_internal LLVMTypeRef lb_type_internal_for_procedures_raw(lbModule *m, Type *t
 	type = base_type(original_type);
 	GB_ASSERT(type->kind == Type_Proc);
 
+	mutex_lock(&m->func_raw_types_mutex);
+	defer (mutex_unlock(&m->func_raw_types_mutex));
+
 	LLVMTypeRef *found = map_get(&m->func_raw_types, type);
 	if (found) {
 		return *found;
@@ -2157,6 +2160,9 @@ gb_internal LLVMTypeRef lb_type_internal(lbModule *m, Type *type) {
 gb_internal LLVMTypeRef lb_type(lbModule *m, Type *type) {
 	type = default_type(type);
 
+	mutex_lock(&m->types_mutex);
+	defer (mutex_unlock(&m->types_mutex));
+
 	LLVMTypeRef *found = map_get(&m->types, type);
 	if (found) {
 		return *found;