Safari iOS 14.3 fails to load wasm even with -sMIN_SAFARI_VERSION=120000 #19718
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ricardperez
changed the title
ricardperez
changed the title
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Using When I run |
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I started testing with newer emscripten versions than I did some tests, and the first version that gave me expected results is Tomorrow I will try my real project with such version and see. |
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I believe this was fixed in binaryen: WebAssembly/binaryen#5676 The original bug was #19121, and I guess this a duplicate of that one? |
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Alright, thanks @sbc100. Shall the release notes for |
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Compiling with emsdk v3.1.23 here is the resulting not working code On Safari 14.3 there's also another problem: createContext: function (canvas, webGLContextAttributes) {
if (!canvas.getContextSafariWebGL2Fixed) {
canvas.getContextSafariWebGL2Fixed = canvas.getContext;
function fixedGetContext(ver, attrs) {
var gl = canvas.getContextSafariWebGL2Fixed(ver, attrs);
// WebGLRenderingContext is not available in scope. this will throw an error
return ver == "webgl" == gl instanceof WebGLRenderingContext ? gl : null;
}
canvas.getContext = fixedGetContext;
}
var ctx = canvas.getContext("webgl", webGLContextAttributes);
if (!ctx) return 0;
var handle = GL.registerContext(ctx, webGLContextAttributes);
return handle;
},while this works correctly createContext: function (canvas, webGLContextAttributes) {
if (!canvas.getContextSafariWebGL2Fixed) {
canvas.getContextSafariWebGL2Fixed = canvas.getContext;
function fixedGetContext(ver, attrs) {
try {
var gl = canvas.getContextSafariWebGL2Fixed(ver, attrs);
// WebGLRenderingContext is not available in scope. but the error will be handled
return ver == "webgl" == gl instanceof WebGLRenderingContext ? gl : null;
} catch(e) {
return null;
}
}
canvas.getContext = fixedGetContext;
}
var ctx = canvas.getContext("webgl", webGLContextAttributes);
if (!ctx) return 0;
var handle = GL.registerContext(ctx, webGLContextAttributes);
return handle;
}, |
Please include the following in your bug report:
Version of emscripten/emsdk:
3.1.26I tested and verified that things work as expected in
3.1.25.Please include the output
emcc -vhereFailing command line in full:
N/A
Full link command and output with
-vappended:Even for runtime issues it helps a lot if you can include the full link command.
Adding
-vto the link command will show all of the sub-commands run whichcan help us diagnose your issue.
This is the output of both build and link as I do it all in a single step:
The issue
I have discovered that my application is not working on iOS 14.3 (and lower) - and it should.
This is the error I am seeing:
The issue started to happen when the emscripten toolchain was bumped from version
3.1.23to3.1.34. I have done different builds with different Emscripten versions and this only happens starting at3.1.26. Checking the release notes in the changelog I see this:This explicitly says that iOS min version was changed from
12.0.0to14.1. I am testing with iOS14.3, so in theory I should not be affected by this. But anyway I tried to link with the recommended flag-sMIN_SAFARI_VERSION=120000. It didn't help. See the next section.Reproduction sample
I managed to create a sample project to reproduce the problem.
It helped me to discover that the optimisation flags make a difference to the result. Using none or little optmisiations (
-O0&-O1) it will work fine when I also use-s MIN_SAFARI_VERSION=120000. But bigger optimisations (-O2and more) will always fail with the error no matter ifMIN_SAFARI_VERSIONwas set or not.This is the project setup I am using:
index.html
worker.js
lib.cpp
And this is the build script:
Any clue of what might be causing the problem?
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