tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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memory_copy.js (1080B)

      1 // A simple test case for memory.copy between different memories.
      2 // See bug 1861267.
      3 
      4 let i = wasmEvalText(
      5 `(module
      6  (memory $$mem0 (data "staubfaenger"))
      7  (memory $$mem1 (data "\\ee\\22\\55\\ff"))
      8  (memory $$mem2 (data "\\dd\\33\\66\\00"))
      9  (memory $$mem3 (data "schnickschnack"))
     10 
     11  (func (export "copy0to3") (param i32 i32 i32)
     12    (memory.copy $$mem3 $$mem0
     13      (local.get 0)
     14      (local.get 1)
     15      (local.get 2))
     16  )
     17  (func (export "copy3to0") (param i32 i32 i32)
     18    (memory.copy $$mem0 $$mem3
     19      (local.get 0)
     20      (local.get 1)
     21      (local.get 2))
     22  )
     23 
     24  (func (export "read0") (param i32) (result i32)
     25    (i32.load8_u $$mem0 (local.get 0))
     26  )
     27  (func (export "read3") (param i32) (result i32)
     28    (i32.load8_u $$mem3 (local.get 0))
     29  )
     30 )`);
     31 
     32 i.exports.copy0to3(4, 5, 6);
     33 let s = "";
     34 for (let ix = 0; ix < 14; ix++) {
     35    s = s + String.fromCharCode(i.exports.read3(ix));
     36 }
     37 
     38 i.exports.copy3to0(8, 2, 7);
     39 s = s + "_";
     40 for (let ix = 0; ix < 12; ix++) {
     41    s = s + String.fromCharCode(i.exports.read0(ix));
     42 }
     43 
     44 assertEq(s, "schnfaengenack_staubfaehnfa");