[jit] Emit a null check for stelem instructions. (dotnet#46817)

Part of the fix for dotnet#46766.
EgorBo · Jan 20, 2021 · c4421ac · c4421ac
1 parent 6fe3b9a
commit c4421ac
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/src/mono/mono/mini/memory-access.c b/src/mono/mono/mini/memory-access.c
@@ -502,6 +502,8 @@ mini_emit_memory_store (MonoCompile *cfg, MonoType *type, MonoInst *dest, MonoIn
 	} else if (!mini_debug_options.weak_memory_model && mini_type_is_reference (type) && cfg->method->wrapper_type != MONO_WRAPPER_WRITE_BARRIER)
 		mini_emit_memory_barrier (cfg, MONO_MEMORY_BARRIER_REL);
 
+	MONO_EMIT_NULL_CHECK (cfg, dest->dreg, FALSE);
+
 	if ((ins_flag & MONO_INST_UNALIGNED) && !COMPILE_LLVM (cfg)) {
 		MonoInst *addr, *mov, *tmp_var;