Crash from android debug mode

[tiantianaixuexi]

Hi, I'm using the latest gltfRuntime version to load the skeletal mesh. It runs very well under Windows, but in Android debugging mode, it will crash directly at breakpoints, and it does not crash in Android development mode. Can you help me check it out?

Engine Version : 5.1.1

1
pc 000000000e1ceef4 /data/app/~~4Aj1_iIcxFJncNziIeJ2Sg==/cn.bxtech.app-d5UyL4hjvK3HOSXl9DwT5g==/lib/arm64/libUnreal.so (FName FNameHelper::MakeDetectNumber(FWideStringViewWithWidth, EFindName)+300) [arm64-v8a::e9aee9afd592dde951f59fad9f25537e]

2
#1 pc 000000000e1cedb4 /data/app/~~4Aj1_iIcxFJncNziIeJ2Sg==/cn.bxtech.app-d5UyL4hjvK3HOSXl9DwT5g==/lib/arm64/libUnreal.so (FName::FName(char16_t const*, EFindName)+104) [arm64-v8a::e9aee9afd592dde951f59fad9f25537e]

3
pc 000000000b070868 /data/app/~~4Aj1_iIcxFJncNziIeJ2Sg==/cn.bxtech.app-d5UyL4hjvK3HOSXl9DwT5g==/lib/arm64/libUnreal.so (FglTFRuntimeParser::TraverseJoints(FReferenceSkeletonModifier&, int, int, FglTFRuntimeNode&, TArray<int, TSizedDefaultAllocator<32> > const&, TMap<int, FName, FDefaultSetAllocator, TDefaultMapHashableKeyFuncs<int, FName, false> >&, TMap<int, UE::Math::TMatrix, FDefaultSetAllocator, TDefaultMapHashableKeyFuncs<int, UE::Math::TMatrix, false> > const&, FglTFRuntimeSkeletonConfig const&)+736) [arm64-v8a::e9aee9afd592dde951f59fad9f25537e]

4
pc 000000000b090568 /data/app/~~4Aj1_iIcxFJncNziIeJ2Sg==/cn.bxtech.app-d5UyL4hjvK3HOSXl9DwT5g==/lib/arm64/libUnreal.so (FglTFRuntimeParser::TraverseJoints(FReferenceSkeletonModifier&, int, int, FglTFRuntimeNode&, TArray<int, TSizedDefaultAllocator<32> > const&, TMap<int, FName, FDefaultSetAllocator, TDefaultMapHashableKeyFuncs<int, FName, false> >&, TMap<int, UE::Math::TMatrix, FDefaultSetAllocator, TDefaultMapHashableKeyFuncs<int, UE::Math::TMatrix, false> > const&, FglTFRuntimeSkeletonConfig const&)+131040) [arm64-v8a::e9aee9afd592dde951f59fad9f25537e]

5
pc 000000000b090568 /data/app/~~4Aj1_iIcxFJncNziIeJ2Sg==/cn.bxtech.app-d5UyL4hjvK3HOSXl9DwT5g==/lib/arm64/libUnreal.so (FglTFRuntimeParser::TraverseJoints(FReferenceSkeletonModifier&, int, int, FglTFRuntimeNode&, TArray<int, TSizedDefaultAllocator<32> > const&, TMap<int, FName, FDefaultSetAllocator, TDefaultMapHashableKeyFuncs<int, FName, false> >&, TMap<int, UE::Math::TMatrix, FDefaultSetAllocator, TDefaultMapHashableKeyFuncs<int, UE::Math::TMatrix, false> > const&, FglTFRuntimeSkeletonConfig const&)+131040) [arm64-v8a::e9aee9afd592dde951f59fad9f25537e]

6
pc 000000000b090568 /data/app/~~4Aj1_iIcxFJncNziIeJ2Sg==/cn.bxtech.app-d5UyL4hjvK3HOSXl9DwT5g==/lib/arm64/libUnreal.so (FglTFRuntimeParser::TraverseJoints(FReferenceSkeletonModifier&, int, int, FglTFRuntimeNode&, TArray<int, TSizedDefaultAllocator<32> > const&, TMap<int, FName, FDefaultSetAllocator, TDefaultMapHashableKeyFuncs<int, FName, false> >&, TMap<int, UE::Math::TMatrix, FDefaultSetAllocator, TDefaultMapHashableKeyFuncs<int, UE::Math::TMatrix, false> > const&, FglTFRuntimeSkeletonConfig const&)+131040) [arm64-v8a::e9aee9afd592dde951f59fad9f25537e]

7
pc 000000000b090568 /data/app/~~4Aj1_iIcxFJncNziIeJ2Sg==/cn.bxtech.app-d5UyL4hjvK3HOSXl9DwT5g==/lib/arm64/libUnreal.so (FglTFRuntimeParser::TraverseJoints(FReferenceSkeletonModifier&, int, int, FglTFRuntimeNode&, TArray<int, TSizedDefaultAllocator<32> > const&, TMap<int, FName, FDefaultSetAllocator, TDefaultMapHashableKeyFuncs<int, FName, false> >&, TMap<int, UE::Math::TMatrix, FDefaultSetAllocator, TDefaultMapHashableKeyFuncs<int, UE::Math::TMatrix, false> > const&, FglTFRuntimeSkeletonConfig const&)+131040) [arm64-v8a::e9aee9afd592dde951f59fad9f25537e]

8
pc 000000000b06c91c /data/app/~~4Aj1_iIcxFJncNziIeJ2Sg==/cn.bxtech.app-d5UyL4hjvK3HOSXl9DwT5g==/lib/arm64/libUnreal.so (FglTFRuntimeParser::FillReferenceSkeleton(TSharedRef<FJsonObject, (ESPMode)1>, FReferenceSkeleton&, TMap<int, FName, FDefaultSetAllocator, TDefaultMapHashableKeyFuncs<int, FName, false> >&, FglTFRuntimeSkeletonConfig const&)+1340) [arm64-v8a::e9aee9afd592dde951f59fad9f25537e]

9
pc 000000000b11aad4 /data/app/~~4Aj1_iIcxFJncNziIeJ2Sg==/cn.bxtech.app-d5UyL4hjvK3HOSXl9DwT5g==/lib/arm64/libUnreal.so (FglTFRuntimeParser::LoadSkinnedMeshRecursiveAsRuntimeLOD(FString const&, int&, TArray<FString, TSizedDefaultAllocator<32> > const&, FglTFRuntimeMeshLOD&, FglTFRuntimeMaterialsConfig const&, FglTFRuntimeSkeletonConfig const&)+3040) [arm64-v8a::e9aee9afd592dde951f59fad9f25537e]

10
pc 000000000b119a44 /data/app/~~4Aj1_iIcxFJncNziIeJ2Sg==/cn.bxtech.app-d5UyL4hjvK3HOSXl9DwT5g==/lib/arm64/libUnreal.so (FglTFRuntimeParser::LoadSkeletalMeshRecursive(FString const&, int, TArray<FString, TSizedDefaultAllocator<32> > const&, FglTFRuntimeSkeletalMeshConfig const&)+120) [arm64-v8a::e9aee9afd592dde951f59fad9f25537e]

11
pc 000000000b00e370 /data/app/~~4Aj1_iIcxFJncNziIeJ2Sg==/cn.bxtech.app-d5UyL4hjvK3HOSXl9DwT5g==/lib/arm64/libUnreal.so (UglTFRuntimeAsset::LoadSkeletalMeshRecursive(FString const&, TArray<FString, TSizedDefaultAllocator<32> > const&, FglTFRuntimeSkeletalMeshConfig const&)+308) [arm64-v8a::e9aee9afd592dde951f59fad9f25537e]

12
pc 000000000afcdb50 /data/app/~~4Aj1_iIcxFJncNziIeJ2Sg==/cn.bxtech.app-d5UyL4hjvK3HOSXl9DwT5g==/lib/arm64/libUnreal.so (UglTFRuntimeAsset::execLoadSkeletalMeshRecursive(UObject*, FFrame&, void*)+636) [arm64-v8a::e9aee9afd592dde951f59fad9f25537e]

20231123095640450.zip

[rdeioris]

Hi, sorry for the late, Can you try with latest master branch ?

Thanks

[seanwavexr]

I believe I'm seeing something related to what tiantianaixuexi saw at the top.

In the 20240430 release, I'm experiencing some very weird crash behavior when spawning a skeletal mesh on Android (Quest 3), inside of FglTFRuntimeParser::TraverseJoints(). It would crash at a varying level of recursion into that method, right at the point where it's constructing the TArray<FString> AppendBones. I tried everything I could to find the issue through normal means, ensuring that it wasn't somehow blowing the stack or writing over random bytes.

The only way I could make it go away was to break up the method into three, where lines 2748-2779 were placed in a separate function, as were lines 2801-2832 (line numbers based on current HEAD). My theory is that there's a compiler bug in how this function is being compiled at its current size, maybe related to it being too large, or that the recursion is breaking an optimization. Frankly, my fix feels too magical, and there's a good chance it's just hiding something else that's going on, but I want to bring it up here in case you know more about this issue.

Log snippet:
01-07 11:36:19.219 7214 7434 F libc : Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x6ef5205910 in tid 7434 (GameThread), pid 7214 (aurus.local.alt) 01-07 11:36:20.125 7875 7875 F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** 01-07 11:36:20.125 7875 7875 F DEBUG : Build fingerprint: 'oculus/eureka/eureka:12/SQ3A.220605.009.A1/50473320127600510:user/release-keys' 01-07 11:36:20.125 7875 7875 F DEBUG : Revision: '0' 01-07 11:36:20.125 7875 7875 F DEBUG : ABI: 'arm64' 01-07 11:36:20.125 7875 7875 F DEBUG : Timestamp: 2025-01-07 11:36:19.339683051-0600 01-07 11:36:20.125 7875 7875 F DEBUG : Process uptime: 32s 01-07 11:36:20.125 7875 7875 F DEBUG : Diagnostic-Collection-Type: Tombstone Proto 01-07 11:36:20.125 7875 7875 F DEBUG : Has-Diagnostic-Summary: Yes 01-07 11:36:20.125 7875 7875 F DEBUG : APK-Location: /data/app/~~i2suqNruK90uMWrSLKS4Dw==/com.wavexr.waveplatform.taurus.local.alt-0_QUAwWld6EkIgTSYwcdqg==/base.apk 01-07 11:36:20.125 7875 7875 F DEBUG : Debugging: No 01-07 11:36:20.125 7875 7875 F DEBUG : Has-Waited-For-Debugger: No 01-07 11:36:20.125 7875 7875 F DEBUG : Last-Activity-Time: 1619500550 01-07 11:36:20.125 7875 7875 F DEBUG : Process-Runtime: 35858 01-07 11:36:20.125 7875 7875 F DEBUG : Waiting-To-Kill: 01-07 11:36:20.125 7875 7875 F DEBUG : Killed-By-AM: No 01-07 11:36:20.125 7875 7875 F DEBUG : Removed: No 01-07 11:36:20.125 7875 7875 F DEBUG : Wanted-ANR-Ui: No 01-07 11:36:20.125 7875 7875 F DEBUG : Killed: No 01-07 11:36:20.125 7875 7875 F DEBUG : OOM-Score-Adj: 0 01-07 11:36:20.125 7875 7875 F DEBUG : Wanted-Error-Ui: No 01-07 11:36:20.125 7875 7875 F DEBUG : Kill-Time: 0 01-07 11:36:20.125 7875 7875 F DEBUG : State: TOP 01-07 11:36:20.125 7875 7875 F DEBUG : Foreground: Yes 01-07 11:36:20.125 7875 7875 F DEBUG : Executable: /system/bin/app_process64 01-07 11:36:20.125 7875 7875 F DEBUG : Cmdline: com.wavexr.waveplatform.taurus.local.alt 01-07 11:36:20.125 7875 7875 F DEBUG : pid: 7214, tid: 7434, name: GameThread >>> com.wavexr.waveplatform.taurus.local.alt <<< 01-07 11:36:20.125 7875 7875 F DEBUG : uid: 10294 01-07 11:36:20.125 7875 7875 F DEBUG : tagged_addr_ctrl: 0000000000000001 01-07 11:36:20.125 7875 7875 F DEBUG : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x6ef5205910 01-07 11:36:20.125 7875 7875 F DEBUG : x0 0000006ef5205910 x1 0000006ef52ef938 x2 0000000000000002 x3 0000006ef525ef30 01-07 11:36:20.125 7875 7875 F DEBUG : x4 0000006ee3922eac x5 0000006ef5887100 x6 000000000020003a x7 00790061006c0070 01-07 11:36:20.125 7875 7875 F DEBUG : x8 0000006ef5205910 x9 0000006ef5205910 x10 0000006ee5dff0ac x11 0000000000001d0a 01-07 11:36:20.125 7875 7875 F DEBUG : x12 0000006e136b0c60 x13 0000000000000020 x14 0000000000000000 x15 0000000000000000 01-07 11:36:20.125 7875 7875 F DEBUG : x16 0000000000000001 x17 0000006ff73a4330 x18 000000000000001c x19 0000006e1488e8c0 01-07 11:36:20.125 7875 7875 F DEBUG : x20 0000000000000000 x21 0000006e13095bc0 x22 0000006ee5eed880 x23 0000006ee60d8cd0 01-07 11:36:20.125 7875 7875 F DEBUG : x24 0000000000000000 x25 0000000000000000 x26 000000000018b64d x27 0000006ef52fdc40 01-07 11:36:20.125 7875 7875 F DEBUG : x28 000000000487ee8b x29 0000006ef51d7a10 01-07 11:36:20.125 7875 7875 F DEBUG : lr 0000006ed603da3c sp 0000006ef51d79f0 pc 0000006ed6021438 pst 0000000060001000 01-07 11:36:20.125 7875 7875 F DEBUG : backtrace: 01-07 11:36:20.125 7875 7875 F DEBUG : #00 pc 00000000103f1438 /data/app/~~i2suqNruK90uMWrSLKS4Dw==/com.wavexr.waveplatform.taurus.local.alt-0_QUAwWld6EkIgTSYwcdqg==/lib/arm64/libUnreal.so (TSizedHeapAllocator<32, FMemory>::ForAnyElementType::ForAnyElementType()+12) (BuildId: b6a78c66f55807ab0fde340fe5822151d66d8d98) 01-07 11:36:20.125 7875 7875 F DEBUG : #01 pc 000000001040da38 /data/app/~~i2suqNruK90uMWrSLKS4Dw==/com.wavexr.waveplatform.taurus.local.alt-0_QUAwWld6EkIgTSYwcdqg==/lib/arm64/libUnreal.so (TSizedHeapAllocator<32, FMemory>::ForElementType<FString>::ForElementType()+20) (BuildId: b6a78c66f55807ab0fde340fe5822151d66d8d98) 01-07 11:36:20.125 7875 7875 F DEBUG : #02 pc 0000000011f7213c /data/app/~~i2suqNruK90uMWrSLKS4Dw==/com.wavexr.waveplatform.taurus.local.alt-0_QUAwWld6EkIgTSYwcdqg==/lib/arm64/libUnreal.so (FglTFRuntimeParser::TraverseJoints(FTraversalData&, int, FglTFRuntimeNode const&)+272) (BuildId: b6a78c66f55807ab0fde340fe5822151d66d8d98) 01-07 11:36:20.125 7875 7875 F DEBUG : #03 pc 0000000011fa0fdc /data/app/~~i2suqNruK90uMWrSLKS4Dw==/com.wavexr.waveplatform.taurus.local.alt-0_QUAwWld6EkIgTSYwcdqg==/lib/arm64/libUnreal.so (FglTFRuntimeParser::TraverseJoints(FTraversalData&, int, FglTFRuntimeNode const&)+192432) (BuildId: b6a78c66f55807ab0fde340fe5822151d66d8d98) 01-07 11:36:20.125 7875 7875 F DEBUG : #04 pc 0000000011fa0fdc /data/app/~~i2suqNruK90uMWrSLKS4Dw==/com.wavexr.waveplatform.taurus.local.alt-0_QUAwWld6EkIgTSYwcdqg==/lib/arm64/libUnreal.so (FglTFRuntimeParser::TraverseJoints(FTraversalData&, int, FglTFRuntimeNode const&)+192432) (BuildId: b6a78c66f55807ab0fde340fe5822151d66d8d98) 01-07 11:36:20.125 7875 7875 F DEBUG : #05 pc 0000000011fa0fdc /data/app/~~i2suqNruK90uMWrSLKS4Dw==/com.wavexr.waveplatform.taurus.local.alt-0_QUAwWld6EkIgTSYwcdqg==/lib/arm64/libUnreal.so (FglTFRuntimeParser::TraverseJoints(FTraversalData&, int, FglTFRuntimeNode const&)+192432) (BuildId: b6a78c66f55807ab0fde340fe5822151d66d8d98) 01-07 11:36:20.125 7875 7875 F DEBUG : #06 pc 0000000011f6ce74 /data/app/~~i2suqNruK90uMWrSLKS4Dw==/com.wavexr.waveplatform.taurus.local.alt-0_QUAwWld6EkIgTSYwcdqg==/lib/arm64/libUnreal.so (FglTFRuntimeParser::FillReferenceSkeleton(TSharedRef<FJsonObject, (ESPMode)1>, FReferenceSkeleton&, TMap<int, FName, FDefaultSetAllocator, TDefaultMapHashableKeyFuncs<int, FName, false> >&, FglTFRuntimeSkeletonConfig const&)+1772) (BuildId: b6a78c66f55807ab0fde340fe5822151d66d8d98) 01-07 11:36:20.125 7875 7875 F DEBUG : #07 pc 000000001205cacc /data/app/~~i2suqNruK90uMWrSLKS4Dw==/com.wavexr.waveplatform.taurus.local.alt-0_QUAwWld6EkIgTSYwcdqg==/lib/arm64/libUnreal.so (FglTFRuntimeParser::CreateSkeletalMeshFromLODs(TSharedRef<FglTFRuntimeSkeletalMeshContext, (ESPMode)1>)+1424) (BuildId: b6a78c66f55807ab0fde340fe5822151d66d8d98) 01-07 11:36:20.125 7875 7875 F DEBUG : #08 pc 000000001209bcb8 /data/app/~~i2suqNruK90uMWrSLKS4Dw==/com.wavexr.waveplatform.taurus.local.alt-0_QUAwWld6EkIgTSYwcdqg==/lib/arm64/libUnreal.so (FglTFRuntimeParser::LoadSkeletalMesh(int, int, FglTFRuntimeSkeletalMeshConfig const&)+2280) (BuildId: b6a78c66f55807ab0fde340fe5822151d66d8d98) 01-07 11:36:20.125 7875 7875 F DEBUG : #09 pc 0000000011ed4eb4 /data/app/~~i2suqNruK90uMWrSLKS4Dw==/com.wavexr.waveplatform.taurus.local.alt-0_QUAwWld6EkIgTSYwcdqg==/lib/arm64/libUnreal.so (UglTFRuntimeAsset::LoadSkeletalMesh(int, int, FglTFRuntimeSkeletalMeshConfig const&)+240) (BuildId: b6a78c66f55807ab0fde340fe5822151d66d8d98) 01-07 11:36:20.125 7875 7875 F DEBUG : #10 pc 0000000011f198d8 /data/app/~~i2suqNruK90uMWrSLKS4Dw==/com.wavexr.waveplatform.taurus.local.alt-0_QUAwWld6EkIgTSYwcdqg==/lib/arm64/libUnreal.so (AglTFRuntimeAssetActor::ProcessNode(USceneComponent*, FName, FglTFRuntimeNode&)+8724) (BuildId: b6a78c66f55807ab0fde340fe5822151d66d8d98) 01-07 11:36:20.125 7875 7875 F DEBUG : #11 pc 0000000011f1b790 /data/app/~~i2suqNruK90uMWrSLKS4Dw==/com.wavexr.waveplatform.taurus.local.alt-0_QUAwWld6EkIgTSYwcdqg==/lib/arm64/libUnreal.so (AglTFRuntimeAssetActor::ProcessNode(USceneComponent*, FName, FglTFRuntimeNode&)+16588) (BuildId: b6a78c66f55807ab0fde340fe5822151d66d8d98) 01-07 11:36:20.125 7875 7875 F DEBUG : #12 pc 0000000011f16b2c /data/app/~~i2suqNruK90uMWrSLKS4Dw==/com.wavexr.waveplatform.taurus.local.alt-0_QUAwWld6EkIgTSYwcdqg==/lib/arm64/libUnreal.so (AglTFRuntimeAssetActor::ProcessAsset()+1896) (BuildId: b6a78c66f55807ab0fde340fe5822151d66d8d98) 01-07 11:36:20.125 7875 7875 F DEBUG : #13 pc 0000000011f163b4 /data/app/~~i2suqNruK90uMWrSLKS4Dw==/com.wavexr.waveplatform.taurus.local.alt-0_QUAwWld6EkIgTSYwcdqg==/lib/arm64/libUnreal.so (AglTFRuntimeAssetActor::BeginPlay()+32) (BuildId: b6a78c66f55807ab0fde340fe5822151d66d8d98) 01-07 11:36:20.125 7875 7875 F DEBUG : #14 pc 000000001bddbcf0 /data/app/~~i2suqNruK90uMWrSLKS4Dw==/com.wavexr.waveplatform.taurus.local.alt-0_QUAwWld6EkIgTSYwcdqg==/lib/arm64/libUnreal.so (AActor::DispatchBeginPlay(bool)+292) (BuildId: b6a78c66f55807ab0fde340fe5822151d66d8d98) 01-07 11:36:20.125 7875 7875 F DEBUG : #15 pc 000000001bddb21c /data/app/~~i2suqNruK90uMWrSLKS4Dw==/com.wavexr.waveplatform.taurus.local.alt-0_QUAwWld6EkIgTSYwcdqg==/lib/arm64/libUnreal.so (AActor::PostActorConstruction()+4392) (BuildId: b6a78c66f55807ab0fde340fe5822151d66d8d98) 01-07 11:36:20.125 7875 7875 F DEBUG : #16 pc 000000001bdcaf24 /data/app/~~i2suqNruK90uMWrSLKS4Dw==/com.wavexr.waveplatform.taurus.local.alt-0_QUAwWld6EkIgTSYwcdqg==/lib/arm64/libUnreal.so (AActor::FinishSpawning(UE::Math::TTransform<double> const&, bool, FComponentInstanceDataCache const*, ESpawnActorScaleMethod)+4684) (BuildId: b6a78c66f55807ab0fde340fe5822151d66d8d98) 01-07 11:36:20.125 7875 7875 F DEBUG : #17 pc 00000000106d24b4 /data/app/~~i2suqNruK90uMWrSLKS4Dw==/com.wavexr.waveplatform.taurus.local.alt-0_QUAwWld6EkIgTSYwcdqg==/lib/arm64/libUnreal.so (BuildId: