Add unit test suites (#3490)

tests/unit/memory64/wasm-apps/8GB_memory.wat

@@ -0,0 +1,53 @@
+(module
+  ;; Memory definition: 4 GB = 65536
+  ;;                    8 GB = 131072
+  ;;                    16 GB = 262144
+  ;;                    20 GB = 327680
+  ;;                    32 GB = 524288
+  (memory (;0;) i64 131072 131072)
+
+  ;; if touch too many pages more than physical memory can provide, 
+  ;; the signal will kill the process
+  (func (export "touch_every_page") (result i64 i64 i32 i32)
+    (local $i i64)
+    i64.const 0x0000000000000ff8
+    local.set $i 
+    loop $loop
+      ;; a[i] = i
+      local.get $i
+      local.get $i
+      i64.store
+      local.get $i 
+      i64.const 4096
+      i64.add 
+      local.set $i 
+      local.get $i
+      ;; max boundary(exclusive) 8GB - 8 = 0x0000000200000000 - 8
+      i64.const 0x0000000200000000 
+      i64.const 8
+      i64.sub
+      i64.lt_u 
+      br_if $loop
+    end
+    i64.const 0x000000000000fff8
+    i64.load
+    i64.const 0x000000010000fff8
+    i64.load
+    ;; lower 8 bytes of 0x000000010001fff8 -> 0x0001fff8
+    i64.const 0x000000010001fff8
+    i32.load
+    ;; higher 8 bytes of 0x000000010001fff8 -> 0x1
+    i64.const 0x000000010001fffc
+    i32.load
+    return 
+  )
+
+  ;; Function to test i64.atomic.store with i64 address
+  (func (export "i64_store_offset_4GB") (param $addr i64) (param $value i64)
+    (i64.store offset=0x100000000 (local.get $addr) (local.get $value))
+  )
+
+  (func (export "i64_load_offset_4GB") (param $addr i64) (result i64)
+    (i64.load offset=0x100000000 (local.get $addr))
+  )
+)