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iOS 15 + WebGL 2 issue

Discussion in 'Web' started by LW2021, Sep 29, 2021.

Page 3 of 4

michael443959

Joined:

Aug 3, 2014

Posts:

1
Maybe possible include this fix into Unity and add some flag to enable it? Our environment depend on Unity Cloud Build and we can't use this fix.

brendanduncan_u3d said: ↑

Technically, the fix is for cpp, not c#. To add the lines, edit the file il2cpp/libil2cpp/metadata/GenericMetadata.cpp in a text editor. You can find this file in:
MacOS:
<Unity installation folder>/Unity.app/Contents/il2cpp/libil2cpp/metadata/GenericMetadata.cpp
Windows:
<Unity installation folder>/il2cpp/libil2cpp/metadata/GenericMetadata.cpp

Find the line
const Il2CppType* GenericMetadata::InflateIfNeeded
add the line #pragma clang optimize off on the line above it.
Find the end of the function and add the #pragma clang optimize on line below it.

It should look like:

Code (CSharp):

#pragma clang optimize off

const Il2CppType* GenericMetadata::InflateIfNeeded(const Il2CppType* type, const Il2CppGenericContext* context, bool inflateMethodVars)

{

switch (type->type)

{

case IL2CPP_TYPE_VAR:

return InflateGenericParameterIfNeeded(type, context->class_inst);

case IL2CPP_TYPE_MVAR:

{

if (context->method_inst)

return InflateGenericParameterIfNeeded(type, context->method_inst);

return type;

}

case IL2CPP_TYPE_ARRAY:

{

const Il2CppType* inflatedElementType = InflateIfNeeded(type->data.array->etype, context, inflateMethodVars);

if (!Il2CppTypeEqualityComparer::AreEqual(inflatedElementType, type->data.array->etype))

{

Il2CppType* inflatedType = (Il2CppType*)MetadataMalloc(sizeof(Il2CppType));

memcpy(inflatedType, type, sizeof(Il2CppType));

Il2CppArrayType* arrayType = (Il2CppArrayType*)MetadataMalloc(sizeof(Il2CppArrayType));

memcpy(arrayType, type->data.array, sizeof(Il2CppArrayType));

arrayType->etype = inflatedElementType;

inflatedType->data.array = arrayType;

++il2cpp_runtime_stats.inflated_type_count;

return inflatedType;

}

return type;

}

case IL2CPP_TYPE_PTR:

case IL2CPP_TYPE_SZARRAY:

{

const Il2CppType* inflatedElementType = InflateIfNeeded(type->data.type, context, inflateMethodVars);

if (!Il2CppTypeEqualityComparer::AreEqual(inflatedElementType, type->data.type))

{

Il2CppType* arrayType = (Il2CppType*)MetadataMalloc(sizeof(Il2CppType));

memcpy(arrayType, type, sizeof(Il2CppType));

arrayType->data.type = inflatedElementType;

++il2cpp_runtime_stats.inflated_type_count;

return arrayType;

}

return type;

}

case IL2CPP_TYPE_GENERICINST:

{

const Il2CppGenericInst* inst = type->data.generic_class->context.class_inst;

if (inst == NULL)

return NULL; // This is a generic type that was too deeply nested to generate

const Il2CppGenericInst* inflatedInst = GetInflatedGenericIntance(inst, context, inflateMethodVars);

Il2CppGenericClass* genericClass = GenericMetadata::GetGenericClass(GenericClass::GetTypeDefinition(type->data.generic_class), inflatedInst);

if (genericClass != type->data.generic_class)

{

Il2CppType* genericType = (Il2CppType*)MetadataMalloc(sizeof(Il2CppType));

memcpy(genericType, type, sizeof(Il2CppType));

genericType->data.generic_class = genericClass;

++il2cpp_runtime_stats.inflated_type_count;

return genericType;

}

return type;

}

default:

return type;

}

}

#pragma clang optimize on

Click to expand...
michael443959, Apr 28, 2022

#101

Thaina likes this.
rmgomez

Joined:

Oct 2, 2014

Posts:

18

brendanduncan_u3d said: ↑

@rmgomez If you're seeing a wasm error that isn't resolved by the temp fix, if you have a minimal repo example, then I can investigate it.
Click to expand...

Somebody here opened a bug report. It's the exact same issue.
https://forum.unity.com/threads/web...-when-playing-simple-particle-system.1225920/

rmgomez, Apr 28, 2022

#102
ravi56

Joined:

Sep 15, 2021

Posts:

7

hello i'm also facing issue in WebGl in ios ,sprties are flickring . i've try all above method but it didn't work .can some one guide me for this?

ravi56, May 2, 2022

#103

bahriztr3432 likes this.
chilledbits

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Jan 4, 2018

Posts:

17

ravi56 said: ↑

hello i'm also facing issue in WebGl in ios ,sprties are flickring . i've try all above method but it didn't work .can some one guide me for this?
Click to expand...

As far as I know there is still no fix or workaround for the flickering issue!

chilledbits, May 2, 2022

#104
Thaina

Joined:

Jul 13, 2012

Posts:

1,164

ravi56 said: ↑

hello i'm also facing issue in WebGl in ios ,sprties are flickring . i've try all above method but it didn't work .can some one guide me for this?
Click to expand...

If I understand correctly. It was purely apple fault that make this ios update contain a bug in safari memory system and that cause unity to break and they can't fix it from unity side. They need to wait for apple to fix their bug and don't know are there any progress yet

Thaina, May 2, 2022

#105
tlonuma

Joined:

Feb 5, 2022

Posts:

1

Hi, I also had the same issue. I followed @brendanduncan_u3d's workaround. It fixed the error message, but then I had the flickering issue.

I realized that most problems were coming because of the .wasm build. Then I created a .asm build (with an older Unity version, 2020, I deleted again the il2cpp cache directory to reverse any changes made to the .cpp file), and it fixed both the error message and the flickering issue.

Overall, it seems that the .asm build is much more stable (even though it may not be the current best practice).

I think I'll continue working with .asm until there is a fix coming for the next iOS.

tlonuma, May 2, 2022

#106
AnthonyKozak

Joined:

Feb 4, 2019

Posts:

6
I applied the fix, removed the Library/Bee folder, restarted unity and compiled a new build. I still get the same errors so far:

Code (CSharp):

...

LOGNot implemented: Class::FromIl2CppType

LOGNot implemented: Class::FromIl2CppType

LOGNot implemented: Class::FromIl2CppType

ERRORexception thrown: RuntimeError: Out of bounds memory access (evaluating 'Module["asm"]["_main"].apply(null,arguments)'),<?>.wasm-function[479]@[wasm code]

<?>.wasm-function[18229]@[wasm code]

<?>.wasm-function[18226]@[wasm code]

<?>.wasm-function[18223]@[wasm code]
AnthonyKozak, May 3, 2022

#107

barraxworld likes this.
chilledbits

Joined:

Jan 4, 2018

Posts:

17

iOS 15.5 beta 4 fixed the Flickering issue for us!

Last edited: May 4, 2022

chilledbits, May 4, 2022

#108

Thaina and unityruba like this.
ravi56

Joined:

Sep 15, 2021

Posts:

7

i have IOS 15.4.1 ,but stil have Flickering issue .

ravi56, May 4, 2022

#109

barraxworld likes this.
AnthonyKozak

Joined:

Feb 4, 2019

Posts:

6

iOS 15.5 beta 4 fixed the game loading, but not the flickering apparently

AnthonyKozak, May 5, 2022

#110

maximiliananzinger likes this.
barraxworld

Joined:

Nov 22, 2015

Posts:

5

M-SugayaTakuma said: ↑

@brendanduncan_u3d I am using WebGL2.
In my project, when the RenderMode of the Canvas is Screen Space - Camera, the image flashes.
This does not happen when Screen Space - Overlay is selected.
I am not sure if this is a problem specific to my project or not.
Click to expand...

I used the fix provided earlier to get the game to run and then setting my UI / Canvas to screen space overlay stopped all the flickering for me. Thanks.

barraxworld, May 5, 2022

#111
TyrantNomad

Joined:

Jul 4, 2013

Posts:

6

barraxworld said: ↑

I used the fix provided earlier to get the game to run and then setting my UI / Canvas to screen space overlay stopped all the flickering for me. Thanks.
Click to expand...

Same - the initial workaround ensures that the game at least runs, and the Overlay canvas change ensures that it does not flicker.

Even if/when the fix is deployed, I'd recommend both workarounds to be applied to your projects until adoption rate of system versions with the fixes is almost guaranteed.

Also, if anyone else was using particle systems combined with Screen Space - Camera, this will help your transition to Screen Space - Overlay:
https://github.com/mob-sakai/ParticleEffectForUGUI#installation

Personally, I had to add an additional script to make the screen-scaling work properly again - the default seemed borked - if you're using physics in your particles, additional adjustments might be required as well.

This is what is currently applied to our particle systems and seems to work nicely:
baseFactor - UIParticle Scale: 100
ScreenScaleFactor: (float)referenceWidth / (float)Screen.width
Dynamic Scale: baseFactor * ScreenScaleFactor
GravityMultiplier: startingValue * (1f / ScreenScaleFactor)

TyrantNomad, May 12, 2022

#112
vcappa

Joined:

Apr 26, 2017

Posts:

2

brendanduncan_u3d said: ↑

Since it can't get any worse than it already is:

In your Unity installation (on MacOS, in Unity.app/Contents), edit:
il2cpp/libil2cpp/metadata/GenericMetadata.cpp

Find the line:
const Il2CppType* GenericMetadata::InflateIfNeeded

Add:
#pragma clang optimize off
to the line before that function to turn off compiler optimizations for the function, and add
#pragma clang optimize on
after the end of that function to turn compiler optimizations back on again. This will disable compiler optimizations for that one function. In my tests, this has been enough to stop the crash.

In your Unity project, delete the directory Library/Bee/artifacts/WebGL/il2cpp to be sure it picks up the changes to that file. Also make sure your iOS Safari isn't trying to load a cached version by going to Settings / Safari and selecting Clear History and Website Data. I've spent plenty of time chasing ghosts by not clearing a cache.

Memory errors are notoriously hard to track down, especially when only one platform, and one version of that platform, has the memory corruption, and that platform is iOS.
Click to expand...

I can't believe it worked! Thank you so much!

vcappa, May 12, 2022

#113
canCaglarCmos

Joined:

May 6, 2022

Posts:

3
brendanduncan_u3d said: ↑

Technically, the fix is for cpp, not c#. To add the lines, edit the file il2cpp/libil2cpp/metadata/GenericMetadata.cpp in a text editor. You can find this file in:
MacOS:
<Unity installation folder>/Unity.app/Contents/il2cpp/libil2cpp/metadata/GenericMetadata.cpp
Windows:
<Unity installation folder>/il2cpp/libil2cpp/metadata/GenericMetadata.cpp

Find the line
const Il2CppType* GenericMetadata::InflateIfNeeded
add the line #pragma clang optimize off on the line above it.
Find the end of the function and add the #pragma clang optimize on line below it.

It should look like:

Code (CSharp):

#pragma clang optimize off

const Il2CppType* GenericMetadata::InflateIfNeeded(const Il2CppType* type, const Il2CppGenericContext* context, bool inflateMethodVars)

{

switch (type->type)

{

case IL2CPP_TYPE_VAR:

return InflateGenericParameterIfNeeded(type, context->class_inst);

case IL2CPP_TYPE_MVAR:

{

if (context->method_inst)

return InflateGenericParameterIfNeeded(type, context->method_inst);

return type;

}

case IL2CPP_TYPE_ARRAY:

{

const Il2CppType* inflatedElementType = InflateIfNeeded(type->data.array->etype, context, inflateMethodVars);

if (!Il2CppTypeEqualityComparer::AreEqual(inflatedElementType, type->data.array->etype))

{

Il2CppType* inflatedType = (Il2CppType*)MetadataMalloc(sizeof(Il2CppType));

memcpy(inflatedType, type, sizeof(Il2CppType));

Il2CppArrayType* arrayType = (Il2CppArrayType*)MetadataMalloc(sizeof(Il2CppArrayType));

memcpy(arrayType, type->data.array, sizeof(Il2CppArrayType));

arrayType->etype = inflatedElementType;

inflatedType->data.array = arrayType;

++il2cpp_runtime_stats.inflated_type_count;

return inflatedType;

}

return type;

}

case IL2CPP_TYPE_PTR:

case IL2CPP_TYPE_SZARRAY:

{

const Il2CppType* inflatedElementType = InflateIfNeeded(type->data.type, context, inflateMethodVars);

if (!Il2CppTypeEqualityComparer::AreEqual(inflatedElementType, type->data.type))

{

Il2CppType* arrayType = (Il2CppType*)MetadataMalloc(sizeof(Il2CppType));

memcpy(arrayType, type, sizeof(Il2CppType));

arrayType->data.type = inflatedElementType;

++il2cpp_runtime_stats.inflated_type_count;

return arrayType;

}

return type;

}

case IL2CPP_TYPE_GENERICINST:

{

const Il2CppGenericInst* inst = type->data.generic_class->context.class_inst;

if (inst == NULL)

return NULL; // This is a generic type that was too deeply nested to generate

const Il2CppGenericInst* inflatedInst = GetInflatedGenericIntance(inst, context, inflateMethodVars);

Il2CppGenericClass* genericClass = GenericMetadata::GetGenericClass(GenericClass::GetTypeDefinition(type->data.generic_class), inflatedInst);

if (genericClass != type->data.generic_class)

{

Il2CppType* genericType = (Il2CppType*)MetadataMalloc(sizeof(Il2CppType));

memcpy(genericType, type, sizeof(Il2CppType));

genericType->data.generic_class = genericClass;

++il2cpp_runtime_stats.inflated_type_count;

return genericType;

}

return type;

}

default:

return type;

}

}

#pragma clang optimize on

Click to expand...

this is solving the problem but flickering issue is still available when using screen space camera and I need to use screen space camera.
canCaglarCmos, May 13, 2022

#114
bahriztr3432

Joined:

Jan 30, 2020

Posts:

1

canCaglarCmos said: ↑

this is solving the problem but flickering issue is still available when using screen space camera and I need to use screen space camera.
Click to expand...

Same! Please need help!

bahriztr3432, May 13, 2022

#115
Benjiz

Joined:

Sep 29, 2016

Posts:

5

Webgl on safari ios/mac still slow & flickering with 1sc black screen or noise

EDIT :
That was before I deleted webglcache in project folder

Last edited: May 14, 2022

Benjiz, May 14, 2022

#116

canCaglarCmos likes this.
youxigame

Joined:

Mar 8, 2022

Posts:

1

brendanduncan_u3d said: ↑

Since it can't get any worse than it already is:

In your Unity installation (on MacOS, in Unity.app/Contents), edit:
il2cpp/libil2cpp/metadata/GenericMetadata.cpp

Find the line:
const Il2CppType* GenericMetadata::InflateIfNeeded

Add:
#pragma clang optimize off
to the line before that function to turn off compiler optimizations for the function, and add
#pragma clang optimize on
after the end of that function to turn compiler optimizations back on again. This will disable compiler optimizations for that one function. In my tests, this has been enough to stop the crash.

In your Unity project, delete the directory Library/Bee/artifacts/WebGL/il2cpp to be sure it picks up the changes to that file. Also make sure your iOS Safari isn't trying to load a cached version by going to Settings / Safari and selecting Clear History and Website Data. I've spent plenty of time chasing ghosts by not clearing a cache.

Memory errors are notoriously hard to track down, especially when only one platform, and one version of that platform, has the memory corruption, and that platform is iOS.
Click to expand...

I followed this solution, but a new error was thrown about shader.

youxigame, May 16, 2022

#117

canCaglarCmos likes this.
peclml14

Joined:

May 17, 2022

Posts:

1

Guys I ended up here for the ScreenSpace - Camera *UI Flickering* issue. I noticed the canvas scale was almos zero 0.01, when Screen Space Overlay it was positive.

So I changed the orthographic camera size from 5 to 2.000. For the scaling to be positive number, it became 7 dot something.

Still testing, but I wonder if this scaling when rounded to zero at 0.01 would cause these ui flickering isues.

-- EDIT

No success, it stopped working well on other devices at first attempt

-- EDIT

TOTAL SUCCESS, it didn't work in the first attempt because i was changing z position for negative numbers before this attempt of scale stuff. Changing back to default ZERO z axis for UI it worked. I think the issue was really the almost zero Z scale for canvas.

-- EDIT

iOS 15.4 the flickering still appears after some time.

Last edited: May 20, 2022

peclml14, May 17, 2022

#118

M_R_Antonio and Thaina like this.
DavidLeertasteW

Joined:

Dec 17, 2017

Posts:

5

rmgomez, we had the same issue. Brendan's fix sadly only fixes the default pipeline builds, not the URP or SRP. However, the 15.5 iOS update which was released a couple of days ago finally is able to open URP Web GL apps. Not everything works perfectly yet, but after days agonizing over even getting the page to load, this is a massive win!

Edit: We are still also using Brendan's fix. I am not sure if it would work without it.

Edit 2: If you run into immense performance problems with URP on Web GL, we found GPU instancing of materials to be the problem on iOS 15.5. once you turn that off on your materials, it works like a charm.

Last edited: May 22, 2022

DavidLeertasteW, May 21, 2022

#119

rmgomez, sub-zero5 and Thaina like this.
Phobetor

Joined:

Jan 12, 2017

Posts:

3

Hi @brendanduncan_u3d! Can I ask you if your workaround can affect negatively some Android Devices, and in which way? Because I found this problem on some Android Devices, such as Samsung Galaxy S9:

"getSupportedProfiles is not a function" (the error includes something about wasm functions)
https://answers.unity.com/questions/1903611/typeerror-getsupportedprofiles-is-not-a-function-a.html

Phobetor, May 23, 2022

#120
brendanduncan_u3d

Unity Technologies

Joined:

Jul 30, 2019

Posts:

437

@Phobetor The work-around would have no noticeable impact, and would have nothing to do with getSupportedProfiles.

@DavidLeertasteW 15.5 should not require the work-around anymore. For GPU instancing being slow, I found the Metal shader compiler is *very* slow for GPU instances, when Angle translates large uniform arrays from GLSL to Metal. I got a fix into the latest Unity (not sure if it's released), and I'll get it backported. The fix limits the batch size for GPU instances on MacOS, avoiding the slow compiler issue.

brendanduncan_u3d, May 24, 2022

#121

Lars-Steenhoff, DavidLeertasteW and adamgolden like this.
Phobetor

Joined:

Jan 12, 2017

Posts:

3

Ok @brendanduncan_u3d, thanks for your reply!

Anyway I made some tests:
1) It seems that with some Android versions (like v4.4 for example) it throws the error "getSupportedProfiles is not a function"
2) I made builds both with and without the engine workaround, and I think that there is the problem, because without the engine workaround the Android versions work well (while iOS 15.4 not), and viceversa...
3) I also tried to install latest Unity 2021 version, same thing, except for the fact that on Android it throws another error (see image below about Android v4.4):

Phobetor, May 24, 2022

#122
brendanduncan_u3d

Unity Technologies

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Jul 30, 2019

Posts:

437

@Phobetor Please file a bug if you think there is a problem, if you haven't already. It's too hard to keep track of all the problems if they aren't logged. I did a grep to see if we're calling getSupportedProfiles and didn't immediately see it used. Unless it's some other "getSupportedProfiles" function, the typical place that would be called is to query whether the ASTC texture compression WebGL extension supports LDR or HDR profiles. I don't know if that's the one you're hitting, and it's certainly not clear how that has anything to do with disabling the optimization of an unrelated function. But stranger things have happened.

Now that 15.5 has been released, the work-around should be less necessary. I hope we can all move on to 15.5 and try and forget 15.4 ever happened.

brendanduncan_u3d, May 24, 2022

#123

De-Panther likes this.
mmdjn

Joined:

Aug 26, 2020

Posts:

1
Hi,

@peclml14
For the flickering issue I used "ScreenSpace - Overlay" with this config in "WebGLTemplates" and the flickering issue on GameObjects and UI has been solved

Code (JavaScript):

config["webglContextAttributes"] = { "preserveDrawingBuffer": true };

But now i'm facing @Phobetor issue "ext.getSupportedProfiles is not a function at _JS_SystemInfo.HasAstcHdr .."
mmdjn, May 29, 2022

#124
canCaglarCmos

Joined:

May 6, 2022

Posts:

3
mmdjn said: ↑

Hi,

@peclml14
For the flickering issue I used "ScreenSpace - Overlay" with this config in "WebGLTemplates" and the flickering issue on GameObjects and UI has been solved

Code (JavaScript):

config["webglContextAttributes"] = { "preserveDrawingBuffer": true };

But now i'm facing @Phobetor issue "ext.getSupportedProfiles is not a function at _JS_SystemInfo.HasAstcHdr .."
Click to expand...

I think not using Screen Space - Overlay is not a solution in my opinion. In some cases, it may be necessary to use ScreenSpace - Camera in games.
canCaglarCmos, May 30, 2022

#125
brendanduncan_u3d

Unity Technologies

Joined:

Jul 30, 2019

Posts:

437
@mmdjn What version of Unity are you using? In the versions I checked that have
JS_SystemInfo_HasAstcHdr (2021.3+), they all have:

Code (CSharp):

if (ext && ext.getSupportedProfiles) {

return ext.getSupportedProfiles().includes("hdr");

}

which should check to see if getSupprotedProfiles is available. If you do a development build, and look in the built framework.js for JS_SystemInfo_HasAstcHdr, does your version have this check?
brendanduncan_u3d, May 30, 2022

#126
elmax

Joined:

Oct 6, 2013

Posts:

19

I get very low FPS on iOS using 15.5 . Progress ist that it is actually working, but still not useable...

elmax, Jun 1, 2022

#127

sub-zero5 likes this.
brendanduncan_u3d

Unity Technologies

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Jul 30, 2019

Posts:

437

@elmax Can you file a bug for the slow performance?

brendanduncan_u3d, Jun 1, 2022

#128
sub-zero5

Joined:

Apr 7, 2022

Posts:

2

Hi all

2 weeks ago after the release of ios 15.5 i was able to open my build on iphone but the performance was really bad although it was running smoothly on Android phones and windows 10
My build is using the standard rendering pipeline

Recently for the past week it is no longer running on iphone and giving me that error
"A problem repeatedly occurred"

Any idea how i can fix this

sub-zero5, Jun 2, 2022

#129
brendanduncan_u3d

Unity Technologies

Joined:

Jul 30, 2019

Posts:

437

@sub-zero5 You can try deleting your Safari cache (Settings / Safari / Clear History and Website Data). Otherwise, without a bug report with a repo, there's not much to go on.

I know Google is still fixing some shader compiler issues with WebGL Metal (which is used on iOS). We should really identify these performance issues, especially if they occur on MacOS Safari, because MacOS Chrome will be switching to the WebGL Metal implementation soon.

brendanduncan_u3d, Jun 2, 2022

#130
sub-zero5

Joined:

Apr 7, 2022

Posts:

2

brendanduncan_u3d said: ↑

@sub-zero5 You can try deleting your Safari cache (Settings / Safari / Clear History and Website Data). Otherwise, without a bug report with a repo, there's not much to go on.

I know Google is still fixing some shader compiler issues with WebGL Metal (which is used on iOS). We should really identify these performance issues, especially if they occur on MacOS Safari, because MacOS Chrome will be switching to the WebGL Metal implementation soon.
Click to expand...

I tried to run it on 3 different iphones tried chrome all giving me the same error

Any hint on how to do a bug report?

sub-zero5, Jun 2, 2022

#131
brendanduncan_u3d

Unity Technologies

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Jul 30, 2019

Posts:

437

@sub-zero5 If you can make a minimally reproducible example, file a Unity bug with the repo example, and that will be good. Without a minimal repo example, I would have to guess any problem I'm seeing is the one you're seeing, and that rarely works out.

brendanduncan_u3d, Jun 2, 2022

#132

sub-zero5 likes this.
canCaglarCmos

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May 6, 2022

Posts:

3

Is there any news about the flickering issue?

canCaglarCmos, Jul 6, 2022

#133
M-SugayaTakuma

Joined:

Apr 9, 2020

Posts:

12

Although not an iOS15 topic, this problem seems to have recurred in iOS16.
When tested on the beta version of iOS16, the WebGL game crashed while launching in Safari. It occurred even in almost simple configurations.
Unlike the iOS 15.4 issue, no error message is displayed.
It is possible that this will be fixed before the official release of iOS16, but it is also possible that it will be released without being resolved like the previous issue.
I would like to propose this issue here, should we do a separate topic or Issue? Thanks.

M-SugayaTakuma, Jul 8, 2022

#134

xaldin-76, chilledbits, H2V and 1 other person like this.
BlackDragon94

Joined:

Apr 5, 2022

Posts:

3

@brendanduncan_u3d
I hope you help me.
I also get an error "an error occurred running the Unity content on this page. See your browser javascript console for more info".
I built the WebGL game with Unity 2021.3.4f1 and tested it on the Chrome browser.

this is an error of my project tested in React.

BlackDragon94, Jul 22, 2022

#135
brendanduncan_u3d

Unity Technologies

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Jul 30, 2019

Posts:

437

@DarlingSSHan This looks like a different issue than the iOS 15.4 issue in this thread. It would be good to make a new forum thread for it. I don't know what this wasm:// URL is, or who's creating that URL, that looks really strange. I don't know much about React, maybe it's doing something weird.

brendanduncan_u3d, Jul 22, 2022

#136
chilledbits

Joined:

Jan 4, 2018

Posts:

17

M-SugayaTakuma said: ↑

Although not an iOS15 topic, this problem seems to have recurred in iOS16.
When tested on the beta version of iOS16, the WebGL game crashed while launching in Safari. It occurred even in almost simple configurations.
Unlike the iOS 15.4 issue, no error message is displayed.
It is possible that this will be fixed before the official release of iOS16, but it is also possible that it will be released without being resolved like the previous issue.
I would like to propose this issue here, should we do a separate topic or Issue? Thanks.
Click to expand...

We experience the same again with iOS 16

chilledbits, Aug 22, 2022

#137
brendanduncan_u3d

Unity Technologies

Joined:

Jul 30, 2019

Posts:

437

@chilledbits Thanks. What are you testing that is failing, and what version of iOS 16?

Last edited: Aug 22, 2022

brendanduncan_u3d, Aug 22, 2022

#138

chilledbits likes this.
chilledbits

Joined:

Jan 4, 2018

Posts:

17

brendanduncan_u3d said: ↑

@chilledbits Thanks. What are you testing that is failing, and what version of iOS 16?
Click to expand...

So actually I have to correct myself: Our Webgl build is working again on iOS16 Beta-6
Fingers crossed that it remains like that until the official release.

chilledbits, Aug 23, 2022

#139

brendanduncan_u3d likes this.
Marek_Bakalarczuk

Joined:

Dec 28, 2012

Posts:

114

Is it possible, that this error is again in iOS 16? I build on Windows, and nothing I do, I get call_indirent on null table

Marek_Bakalarczuk, Jan 21, 2023

#140
mengqiwei

Joined:

Mar 15, 2022

Posts:

7

Hello！brendanduncan_u3d，
The Unity version used is 2020.3.35F1

On any phone running Android, you can open it, but on an iphone, the link won't open. Most of the time, it flashes and then reloads, i'll put in a video, and you can see https://youtube.com/shorts/pUxma0yBJ_c?feature=share

Looking forward to your reply, thank you

mengqiwei, Jan 29, 2023

#141

Thaina likes this.
leenaviradiya1

Joined:

May 7, 2019

Posts:

2

hey @brendanduncan_u3d Any Updates regarding the Image flicker issue?, and also can someone please provide best practices for webgl Builds and settings

leenaviradiya1, Feb 14, 2023

#142
Thaina

Joined:

Jul 13, 2012

Posts:

1,164

As of ios 16 this issue that the webgl will refresh itself after loading scene, sometimes eventually after loading second scene, still persist and only get worse

Thaina, Apr 7, 2023

#143

cmortizm likes this.
arjuniscool0204

Joined:

May 16, 2017

Posts:

14

brendanduncan_u3d said: ↑

Since it can't get any worse than it already is:

In your Unity installation (on MacOS, in Unity.app/Contents), edit:
il2cpp/libil2cpp/metadata/GenericMetadata.cpp

Find the line:
const Il2CppType* GenericMetadata::InflateIfNeeded

Add:
#pragma clang optimize off
to the line before that function to turn off compiler optimizations for the function, and add
#pragma clang optimize on
after the end of that function to turn compiler optimizations back on again. This will disable compiler optimizations for that one function. In my tests, this has been enough to stop the crash.

In your Unity project, delete the directory Library/Bee/artifacts/WebGL/il2cpp to be sure it picks up the changes to that file. Also make sure your iOS Safari isn't trying to load a cached version by going to Settings / Safari and selecting Clear History and Website Data. I've spent plenty of time chasing ghosts by not clearing a cache.

Memory errors are notoriously hard to track down, especially when only one platform, and one version of that platform, has the memory corruption, and that platform is iOS.
Click to expand...

Hey brendan, after applying this fix for iOS 15 I get a new error. The game runs normally after closing the error. Looks like something audio related but not sure what it is.

An error occurred running the Unity content on this page. See your browser JavaScript console for more info. The error was:
NotSupportedError: The operation is not supported.
play@[native code]
@https://dcklsnvoejo0x.cloudfront.net/25EZa/Build/Mobile.framework.js:3:57721
jsAudioPlayPendingBlockedAudio@https://dcklsnvoejo0x.cloudfront.net/25EZa/Build/Mobile.framework.js:3:53525
@https://dcklsnvoejo0x.cloudfront.net/25EZa/Build/Mobile.framework.js:3:53726
forEach@[native code]
jsAudioPlayBlockedAudios@https://dcklsnvoejo0x.cloudfront.net/25EZa/Build/Mobile.framework.js:3:53677
_userEventCallback@https://dcklsnvoejo0x.cloudfront.net/25EZa/Build/Mobile.framework.js:3:54263

arjuniscool0204, Apr 8, 2023

#144
cmortizm

Joined:

Jan 10, 2021

Posts:

3

Thaina said: ↑

As of ios 16 this issue that the webgl will refresh itself after loading scene, sometimes eventually after loading second scene, still persist and only get worse
Click to expand...

I was experimenting the same issue and after implementing the workarround from @brendanduncan_u3d I still had to brake my game scene into smaller scenes to have it not load all at once. Here are my player settings, hopefully this is useful to you and anybody else.

cmortizm, May 12, 2023

#145

Thaina likes this.
Ricardo_Rodrigues

Joined:

Apr 4, 2022

Posts:

1

O problema continua no webGL para IOS. Esse problema de WASM precisa ser solucionado pela Unity. Alguem conseguiu resolver isso?

Ricardo_Rodrigues, Jun 2, 2023

#146
fxlange

Joined:

Dec 20, 2016

Posts:

45

Our application is silently crashing or restarting on ios safari (16.5). Unity 2022.2.12 and 2022.3.
I haven't found a way to get any information about the crash/restart.

It is always happening, sometimes almost immediately, sometimes after a few secs even without any interaction. No scene switches involved.

Anyone experiencing the same or any tips how to track the issue down?

fxlange, Jul 4, 2023

#147
fxlange

Joined:

Dec 20, 2016

Posts:

45

fxlange said: ↑

Our application is silently crashing or restarting on ios safari (16.5). Unity 2022.2.12 and 2022.3.
I haven't found a way to get any information about the crash/restart.

It is always happening, sometimes almost immediately, sometimes after a few secs even without any interaction. No scene switches involved.

Anyone experiencing the same or any tips how to track the issue down?
Click to expand...

It seems to be caused by the new default setting "webgl via metal" under safari -> advanced -> experimental settings. I turned it off and now app runs smooth. Unfortuntelay this is good to know but is not a scaleable solution :/

fxlange, Jul 4, 2023

#148
gosoon

Joined:

Jun 9, 2023

Posts:

17

brendanduncan_u3d said: ↑

The Library directory should be generated after you do a build. I meant if you edit the GenericMetadata.cpp file, and if you already have a build for your project, you should delete that Library directory to make sure the next build gets the change to GenericMetadata.cpp. You wouldn't need to delete it if you hadn't built the project yet, or if you had already deleted it after making the change.
Click to expand...

I deleted my il2cpp file and rebuilt, but the folder is not newly created. What should I check?

gosoon, Aug 24, 2023

#149
unityruba

Unity Technologies

Joined:

Nov 6, 2020

Posts:

273

fxlange said: ↑

Our application is silently crashing or restarting on ios safari (16.5). Unity 2022.2.12 and 2022.3.
I haven't found a way to get any information about the crash/restart.

It is always happening, sometimes almost immediately, sometimes after a few secs even without any interaction. No scene switches involved.

Anyone experiencing the same or any tips how to track the issue down?
Click to expand...

Can you attach a build zip file here for me to take a quick look? It can give me an indication whether or not we need a full-fledged bug report for it.
Also, did this just start occurring with iOS 16.5? was it not crashing in previous iOS versions?

unityruba, Aug 24, 2023

#150

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