contract3 with heap

samples/contract3.rs

@@ -0,0 +1,16 @@
+#![feature(link_args)]
+#![feature(drop_types_in_const)]
+#![no_main]
+
+use std::slice;
+
+#[link_args = "-s WASM=1 -s NO_EXIT_RUNTIME=1 -s NO_FILESYSTEM=1"]
+extern {}
+
+#[no_mangle]
+pub fn call(input: *mut u8) {
+    let mut slice = unsafe { slice::from_raw_parts_mut(input, 8192) }; // 8kb input data
+    for i in 0..slice.len() {
+        slice[i] = slice[i] + 2;
+    } 
+}