Recently I had an issue reported on an app of mine, SimpleMarkdown, where the app would crash when tapping on a menu item from the navigation drawer. I unfortunately wasn't able to reproduce the issue on my personal device, a Pixel 7 at the time of writing, but I got a couple of other reports on the same issue and via the reviews on the Play Store1. I also wasn't seeing the crash in any of my automated tests that run on Firebase Test Lab for each pull request. One user affected by the crash asked if I was able to reproduce the issue in an emulator, so I figured I'd give it a shot2, and sure enough, the app crashed. Much to my dismay, the error message was entirely unhelpful though:
Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x28 in tid 12327 (RenderThread), pid 12254 (lemarkdown.free)
Cmdline: com.wbrawner.simplemarkdown.free
pid: 12254, tid: 12327, name: RenderThread >>> com.wbrawner.simplemarkdown.free <<<
Some kind of native crash (yay) and not a whole lot to work with. I was tempted
to just throw my hands up and say "maybe a future release of Android/Jetpack
Compose will solve this", but I didn't know how many users would be affected by
this and given that it was following a pretty major release, I figured I should
at least investigate a little. I needed some more information though, so I tried
removing the package:mine filter from logcat in Android Studio, and there I
did in fact get some more information, though still not quite actionable:
The full native backtrace
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
Build fingerprint: 'google/sdk_gphone64_x86_64/emu64xa:15/AP31.240617.003/12088229:user/release-keys'
Revision: '0'
ABI: 'x86_64'
Timestamp: 2024-08-28 21:29:05.474897959-0600
Process uptime: 222s
Cmdline: com.wbrawner.simplemarkdown.free
pid: 12254, tid: 12327, name: RenderThread >>> com.wbrawner.simplemarkdown.free <<<
uid: 10251
signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x0000000000000028
Cause: null pointer dereference
rax 00007d21f6e2d4e0 rbx 0000000000000000 rcx 0000000000000000 rdx 0000000000000002
r8 0000000000000001 r9 0000000000000000 r10 0000000000000000 r11 0000000000000000
r12 00007d21f6e2d5c0 r13 0000000000000000 r14 0000000000000000 r15 00007d21f6e2d4e0
rdi 0000000000000000 rsi 00007d21f6e2d2d8
rbp 0000000000000000 rsp 00007d21f6e2d3e8 rip 00007d2514e24820
55 total frames
backtrace:
#00 pc 0000000000424820 /system/lib64/libhwui.so (SkSurface::getCanvas()+0) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#01 pc 00000000002a2a90 /system/lib64/libhwui.so (android::uirenderer::skiapipeline::GLFunctorDrawable::onDraw(SkCanvas*)+1216) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#02 pc 000000000033a429 /system/lib64/libhwui.so (SkDrawable::draw(SkCanvas*, SkMatrix const*)+105) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#03 pc 000000000055af68 /system/lib64/libhwui.so (skgpu::ganesh::Device::drawDrawable(SkCanvas*, SkDrawable*, SkMatrix const*)+392) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#04 pc 0000000000289634 /system/lib64/libhwui.so (android::uirenderer::$_37::__invoke(void const*, SkCanvas*, SkMatrix const&) (.__uniq.150848978645254602633048518174355561839)+132) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#05 pc 0000000000285b26 /system/lib64/libhwui.so (android::uirenderer::DisplayListData::draw(SkCanvas*) const+182) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#06 pc 0000000000250eec /system/lib64/libhwui.so (android::uirenderer::skiapipeline::RenderNodeDrawable::drawContent(SkCanvas*) const+1068) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#07 pc 0000000000251774 /system/lib64/libhwui.so (android::uirenderer::skiapipeline::RenderNodeDrawable::forceDraw(SkCanvas*) const+276) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#08 pc 000000000033a429 /system/lib64/libhwui.so (SkDrawable::draw(SkCanvas*, SkMatrix const*)+105) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#09 pc 0000000000285b26 /system/lib64/libhwui.so (android::uirenderer::DisplayListData::draw(SkCanvas*) const+182) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#10 pc 0000000000250eec /system/lib64/libhwui.so (android::uirenderer::skiapipeline::RenderNodeDrawable::drawContent(SkCanvas*) const+1068) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#11 pc 0000000000251774 /system/lib64/libhwui.so (android::uirenderer::skiapipeline::RenderNodeDrawable::forceDraw(SkCanvas*) const+276) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#12 pc 000000000033a429 /system/lib64/libhwui.so (SkDrawable::draw(SkCanvas*, SkMatrix const*)+105) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#13 pc 0000000000285b26 /system/lib64/libhwui.so (android::uirenderer::DisplayListData::draw(SkCanvas*) const+182) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#14 pc 0000000000250eec /system/lib64/libhwui.so (android::uirenderer::skiapipeline::RenderNodeDrawable::drawContent(SkCanvas*) const+1068) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#15 pc 0000000000251774 /system/lib64/libhwui.so (android::uirenderer::skiapipeline::RenderNodeDrawable::forceDraw(SkCanvas*) const+276) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#16 pc 000000000033a429 /system/lib64/libhwui.so (SkDrawable::draw(SkCanvas*, SkMatrix const*)+105) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#17 pc 0000000000285b26 /system/lib64/libhwui.so (android::uirenderer::DisplayListData::draw(SkCanvas*) const+182) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#18 pc 0000000000250eec /system/lib64/libhwui.so (android::uirenderer::skiapipeline::RenderNodeDrawable::drawContent(SkCanvas*) const+1068) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#19 pc 0000000000251774 /system/lib64/libhwui.so (android::uirenderer::skiapipeline::RenderNodeDrawable::forceDraw(SkCanvas*) const+276) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#20 pc 000000000033a429 /system/lib64/libhwui.so (SkDrawable::draw(SkCanvas*, SkMatrix const*)+105) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#21 pc 0000000000285b26 /system/lib64/libhwui.so (android::uirenderer::DisplayListData::draw(SkCanvas*) const+182) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#22 pc 0000000000250eec /system/lib64/libhwui.so (android::uirenderer::skiapipeline::RenderNodeDrawable::drawContent(SkCanvas*) const+1068) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#23 pc 0000000000251774 /system/lib64/libhwui.so (android::uirenderer::skiapipeline::RenderNodeDrawable::forceDraw(SkCanvas*) const+276) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#24 pc 000000000033a429 /system/lib64/libhwui.so (SkDrawable::draw(SkCanvas*, SkMatrix const*)+105) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#25 pc 0000000000285b26 /system/lib64/libhwui.so (android::uirenderer::DisplayListData::draw(SkCanvas*) const+182) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#26 pc 0000000000250eec /system/lib64/libhwui.so (android::uirenderer::skiapipeline::RenderNodeDrawable::drawContent(SkCanvas*) const+1068) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#27 pc 0000000000251774 /system/lib64/libhwui.so (android::uirenderer::skiapipeline::RenderNodeDrawable::forceDraw(SkCanvas*) const+276) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#28 pc 000000000033a429 /system/lib64/libhwui.so (SkDrawable::draw(SkCanvas*, SkMatrix const*)+105) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#29 pc 0000000000285b26 /system/lib64/libhwui.so (android::uirenderer::DisplayListData::draw(SkCanvas*) const+182) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#30 pc 0000000000250eec /system/lib64/libhwui.so (android::uirenderer::skiapipeline::RenderNodeDrawable::drawContent(SkCanvas*) const+1068) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#31 pc 0000000000251774 /system/lib64/libhwui.so (android::uirenderer::skiapipeline::RenderNodeDrawable::forceDraw(SkCanvas*) const+276) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#32 pc 000000000033a429 /system/lib64/libhwui.so (SkDrawable::draw(SkCanvas*, SkMatrix const*)+105) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#33 pc 0000000000285b26 /system/lib64/libhwui.so (android::uirenderer::DisplayListData::draw(SkCanvas*) const+182) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#34 pc 0000000000250eec /system/lib64/libhwui.so (android::uirenderer::skiapipeline::RenderNodeDrawable::drawContent(SkCanvas*) const+1068) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#35 pc 0000000000251774 /system/lib64/libhwui.so (android::uirenderer::skiapipeline::RenderNodeDrawable::forceDraw(SkCanvas*) const+276) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#36 pc 000000000033a429 /system/lib64/libhwui.so (SkDrawable::draw(SkCanvas*, SkMatrix const*)+105) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#37 pc 0000000000285b26 /system/lib64/libhwui.so (android::uirenderer::DisplayListData::draw(SkCanvas*) const+182) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#38 pc 0000000000250eec /system/lib64/libhwui.so (android::uirenderer::skiapipeline::RenderNodeDrawable::drawContent(SkCanvas*) const+1068) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#39 pc 0000000000251774 /system/lib64/libhwui.so (android::uirenderer::skiapipeline::RenderNodeDrawable::forceDraw(SkCanvas*) const+276) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#40 pc 000000000033a429 /system/lib64/libhwui.so (SkDrawable::draw(SkCanvas*, SkMatrix const*)+105) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#41 pc 0000000000285b26 /system/lib64/libhwui.so (android::uirenderer::DisplayListData::draw(SkCanvas*) const+182) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#42 pc 0000000000250eec /system/lib64/libhwui.so (android::uirenderer::skiapipeline::RenderNodeDrawable::drawContent(SkCanvas*) const+1068) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#43 pc 0000000000251774 /system/lib64/libhwui.so (android::uirenderer::skiapipeline::RenderNodeDrawable::forceDraw(SkCanvas*) const+276) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#44 pc 0000000000248e1a /system/lib64/libhwui.so (android::uirenderer::skiapipeline::SkiaPipeline::renderLayerImpl(android::uirenderer::RenderNode*, android::uirenderer::Rect const&)+442) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#45 pc 00000000002a48e3 /system/lib64/libhwui.so (android::uirenderer::skiapipeline::SkiaGpuPipeline::renderLayersImpl(android::uirenderer::LayerUpdateQueue const&, bool)+147) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#46 pc 0000000000249a69 /system/lib64/libhwui.so (android::uirenderer::skiapipeline::SkiaPipeline::renderFrame(android::uirenderer::LayerUpdateQueue const&, SkRect const&, std::__1::vector<android::sp<android::uirenderer::RenderNode>, std::__1::allocator<android::sp<android::uirenderer::RenderNode>>> const&, bool, android::uirenderer::Rect const&, sk_sp<SkSurface>, SkMatrix const&)+601) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#47 pc 00000000002a925e /system/lib64/libhwui.so (android::uirenderer::skiapipeline::SkiaOpenGLPipeline::draw(android::uirenderer::renderthread::Frame const&, SkRect const&, SkRect const&, android::uirenderer::LightGeometry const&, android::uirenderer::LayerUpdateQueue*, android::uirenderer::Rect const&, bool, android::uirenderer::LightInfo const&, std::__1::vector<android::sp<android::uirenderer::RenderNode>, std::__1::allocator<android::sp<android::uirenderer::RenderNode>>> const&, android::uirenderer::FrameInfoVisualizer*, android::uirenderer::renderthread::HardwareBufferRenderParams const&, std::__1::mutex&)+830) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#48 pc 0000000000256f03 /system/lib64/libhwui.so (android::uirenderer::renderthread::CanvasContext::draw(bool)+979) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#49 pc 000000000025a8dc /system/lib64/libhwui.so (std::__1::__function::__func<android::uirenderer::renderthread::DrawFrameTask::postAndWait()::$_0, std::__1::allocator<android::uirenderer::renderthread::DrawFrameTask::postAndWait()::$_0>, void ()>::operator()() (.__uniq.264041412789356548918088680803242235290.c303f2d2360db58ed70a2d0ac7ed911b)+1548) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#50 pc 000000000026653e /system/lib64/libhwui.so (android::uirenderer::WorkQueue::process()+686) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#51 pc 00000000002b43db /system/lib64/libhwui.so (android::uirenderer::renderthread::RenderThread::threadLoop()+475) (BuildId: 7bfb5921a7aa43da3c2e07e65703d737)
#52 pc 0000000000010562 /system/lib64/libutils.so (android::Thread::_threadLoop(void*)+178) (BuildId: 8a1cecdd149caf732e29843b6721becd)
#53 pc 000000000006d62a /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start(void*)+58) (BuildId: eb58b4d427279994f00c0e1818477e4f)
#54 pc 0000000000060348 /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+56) (BuildId: eb58b4d427279994f00c0e1818477e4f)
Luckily, this gave me enough to go searching for on the web, where I eventually
landed upon this PR for React Native that proported to fix what appeared to be
the same issue I was running into. I had nothing to lose so I figured I'd adapt
the fix to my code and sure enough, the crash went away! You can see the
git diff for my fix in the repo, but the TL;DR of it all is, if you are
experiencing crashes when trying to use a WebView in Jetpack Compose, try
wrapping your AndroidView in a FrameLayout and modifying your code
accordingly. Instead of this...
AndroidView(
factory = { context ->
WebView(context).apply {
// ...
}
},
update = { webView ->
// ...
}
)
... try this instead:
private const val WEBVIEW_TAG = "myWebViewTag"
AndroidView(
factory = { context ->
FrameLayout(context).apply {
addView(
WebView(context).apply {
tag = WEBVIEW_TAG
// ...
}
)
}
},
update = { frameLayout ->
frameLayout.findViewWithTag<WebView>(WEBVIEW_TAG).apply {
// ...
}
}
)
-
Leaving 1 or 2 star reviews for a bug/crash on a free and open source project is quite demoralizing by the way. ↩
-
I actually tend to do most of my development on physical devices since I've usually had the opposite experience, where the app seems to work just fine on an emulator but has some weird issue on a real device, or because I just want to interact with the app in the way that most users will. ↩
