[wasm64] Fix glSharedSource in >4gb mode and enable test under wasm64 (#21184)

Author: sbc100

.circleci/config.yml

@@ -816,6 +816,7 @@ jobs:
             browser64_4gb.test_async_*
             browser64_4gb.test_audio_worklet*
             browser64_4gb.test_emscripten_log
+            browser64_4gb.test_clientside_vertex_arrays_es3
             "
   test-browser-firefox:
     executor: bionic

src/library_webgl.js

@@ -425,8 +425,8 @@ for (/**@suppress{duplicate}*/var i = 0; i < {{{ GL_POOL_TEMP_BUFFERS_SIZE }}};
     getSource: (shader, count, string, length) => {
       var source = '';
       for (var i = 0; i < count; ++i) {
-        var len = length ? {{{ makeGetValue('length', 'i*4', 'i32') }}} : -1;
-        source += UTF8ToString({{{ makeGetValue('string', 'i*4', 'i32') }}}, len < 0 ? undefined : len);
+        var len = length ? {{{ makeGetValue('length', 'i*' * POINTER_SIZE, '*') }}} : undefined;
+        source += UTF8ToString({{{ makeGetValue('string', 'i*' + POINTER_SIZE, '*') }}}, len);
       }
 #if LEGACY_GL_EMULATION
       // Let's see if we need to enable the standard derivatives extension

test/code_size/hello_webgl2_wasm.json

@@ -1,10 +1,10 @@
 {
   "a.html": 569,
   "a.html.gz": 379,
-  "a.js": 4697,
-  "a.js.gz": 2419,
+  "a.js": 4681,
+  "a.js.gz": 2412,
   "a.wasm": 10388,
   "a.wasm.gz": 6692,
-  "total": 15654,
-  "total_gz": 9490
+  "total": 15638,
+  "total_gz": 9483
 }

test/code_size/hello_webgl2_wasm2js.json

@@ -1,10 +1,10 @@
 {
   "a.html": 567,
   "a.html.gz": 379,
-  "a.js": 17931,
-  "a.js.gz": 8098,
+  "a.js": 17917,
+  "a.js.gz": 8089,
   "a.mem": 3123,
   "a.mem.gz": 2693,
-  "total": 21621,
-  "total_gz": 11170
+  "total": 21607,
+  "total_gz": 11161
 }

test/code_size/hello_webgl_wasm.json

@@ -1,10 +1,10 @@
 {
   "a.html": 569,
   "a.html.gz": 379,
-  "a.js": 4183,
-  "a.js.gz": 2241,
+  "a.js": 4167,
+  "a.js.gz": 2236,
   "a.wasm": 10388,
   "a.wasm.gz": 6692,
-  "total": 15140,
-  "total_gz": 9312
+  "total": 15124,
+  "total_gz": 9307
 }

test/code_size/hello_webgl_wasm2js.json

@@ -1,10 +1,10 @@
 {
   "a.html": 567,
   "a.html.gz": 379,
-  "a.js": 17409,
-  "a.js.gz": 7912,
+  "a.js": 17395,
+  "a.js.gz": 7900,
   "a.mem": 3123,
   "a.mem.gz": 2693,
-  "total": 21099,
-  "total_gz": 10984
+  "total": 21085,
+  "total_gz": 10972
 }