wasm2js: Mangle import names for JS (#2267)

This fixes names that would be invalid in JS, like a.b. Turns out the Go compiler emits wasm with such imports.

Also add some docs on how to use wasm2js.

Fixes #2263

1 files changed, 37 insertions, 0 deletions

diff --git a/test/wasm2js/dot_import.2asm.js b/test/wasm2js/dot_import.2asm.js
new file mode 100644
index 000000000..87b9971ea
--- /dev/null
+++ b/test/wasm2js/dot_import.2asm.js
@@ -0,0 +1,37 @@
+import { ba_se } from 'mod.ule';
+
+function asmFunc(global, env, buffer) {
+ var HEAP8 = new global.Int8Array(buffer);
+ var HEAP16 = new global.Int16Array(buffer);
+ var HEAP32 = new global.Int32Array(buffer);
+ var HEAPU8 = new global.Uint8Array(buffer);
+ var HEAPU16 = new global.Uint16Array(buffer);
+ var HEAPU32 = new global.Uint32Array(buffer);
+ var HEAPF32 = new global.Float32Array(buffer);
+ var HEAPF64 = new global.Float64Array(buffer);
+ var Math_imul = global.Math.imul;
+ var Math_fround = global.Math.fround;
+ var Math_abs = global.Math.abs;
+ var Math_clz32 = global.Math.clz32;
+ var Math_min = global.Math.min;
+ var Math_max = global.Math.max;
+ var Math_floor = global.Math.floor;
+ var Math_ceil = global.Math.ceil;
+ var Math_sqrt = global.Math.sqrt;
+ var abort = env.abort;
+ var nan = global.NaN;
+ var infinity = global.Infinity;
+ var base = env.ba_se;
+ function $0() {
+  base();
+ }
+ 
+ var FUNCTION_TABLE = [];
+ return {
+  "exported": $0
+ };
+}
+
+var memasmFunc = new ArrayBuffer(65536);
+var retasmFunc = asmFunc({Math,Int8Array,Uint8Array,Int16Array,Uint16Array,Int32Array,Uint32Array,Float32Array,Float64Array,NaN,Infinity}, {abort:function() { throw new Error('abort'); },ba_se},memasmFunc);
+export var exported = retasmFunc.exported;