[Impeller] Segfault in Vulkan back end when running framework tests #144116
Description
flutter_tester is segfaulting or failing assertions at various points within vk::Framebuffer::executeLoadOp/vk::Image.
This can be reliably reproduced when running the test/widgets/shadow_test.dart framework test with --enable-impeller.
The exact place of the failure is inconsistent across runs. An example stack trace:
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x000055fc6db6eb79 in vk::Image::rowPitchBytes (this=0x55fc6faffe98, aspect=VK_IMAGE_ASPECT_COLOR_BIT,
mipLevel=0) at ../../flutter/third_party/swiftshader/src/Vulkan/VkImage.cpp:833
#1 0x000055fc6e1ac8c9 in sw::Blitter::fastClear (this=<optimized out>,
clearValue=clearValue@entry=0x7fc996ffc440, clearFormat=clearFormat@entry=...,
dest=dest@entry=0x55fc6faffe98, viewFormat=..., subresourceRange=..., renderArea=0x55fc6faed3b8)
at ../../flutter/third_party/swiftshader/src/Device/Blitter.cpp:263
#2 0x000055fc6e1ac021 in sw::Blitter::clear (this=0x55fc6f42edb0, pixel=0x7fc996ffc440, format=...,
dest=0x55fc6faffe98, viewFormat=..., subresourceRange=..., renderArea=0x55fc6faed3b8)
at ../../flutter/third_party/swiftshader/src/Device/Blitter.cpp:88
#3 0x000055fc6db71751 in vk::Image::clear (this=<optimized out>, pixelData=<optimized out>,
pixelFormat=<optimized out>, viewFormat=..., subresourceRange=..., renderArea=<optimized out>)
at ../../flutter/third_party/swiftshader/src/Vulkan/VkImage.cpp:1068
#4 0x000055fc6db71751 in vk::Image::clear (this=0x55fc6faffe98, clearValue=..., viewFormat=...,
renderArea=..., subresourceRange=...)
#5 0x000055fc6db6bd56 in vk::ImageView::clear (this=0x55fc6fafffe8, clearValue=..., aspectMask=1,
renderArea=...) at ../../flutter/third_party/swiftshader/src/Vulkan/VkImageView.cpp:192
#6 0x000055fc6db72b81 in vk::Framebuffer::executeLoadOp (this=0x55fc6fafd928, renderPass=0x55fc6fafd878,
clearValueCount=<optimized out>, pClearValues=<optimized out>, renderArea=...)
at ../../flutter/third_party/swiftshader/src/Vulkan/VkFramebuffer.cpp:126
#7 0x000055fc6db65a7b in vk::CommandBuffer::submit (this=0x55fc6faed178, executionState=...)
at ../../flutter/third_party/swiftshader/src/Vulkan/VkCommandBuffer.cpp:2330
#8 0x000055fc6db53a2b in vk::Queue::submitQueue (this=this@entry=0x55fc6f42e8e0, task=...)
at ../../flutter/third_party/swiftshader/src/Vulkan/VkQueue.cpp:104
#9 0x000055fc6db532cb in vk::Queue::taskLoop (this=0x55fc6f42e8e0, scheduler=<optimized out>)
at ../../flutter/third_party/swiftshader/src/Vulkan/VkQueue.cpp:156
#10 0x000055fc6db5461b in std::_fl::__invoke[abi:v15000]<void (vk::Queue::*)(marl::Scheduler*), vk::Queue*, ma--Type <RET> for more, q to quit, c to continue without paging--c
rl::Scheduler*, void>(void (vk::Queue::*&&)(marl::Scheduler*), vk::Queue*&&, marl::Scheduler*&&) (
__f=@0x55fc6f427058: (void (vk::Queue::*)(vk::Queue * const, marl::Scheduler *)) 0x55fc6db53230 <vk::Queue::taskLoop(marl::Scheduler*)>, __a0=@0x55fc6f427068: 0x55fc6f42e8e0, __args=@0x55fc6f427070: 0x55fc6f4270e0)
at ../../third_party/libcxx/include/__functional/invoke.h:368
#11 std::_fl::__thread_execute[abi:v15000]<std::_fl::unique_ptr<std::_fl::__thread_struct, std::_fl::default_delete<std::_fl::__thread_struct> >, void (vk::Queue::*)(marl::Scheduler*), vk::Queue*, marl::Scheduler*, 2ul, 3ul>(std::_fl::tuple<std::_fl::unique_ptr<std::_fl::__thread_struct, std::_fl::default_delete<std::_fl::__thread_struct> >, void (vk::Queue::*)(marl::Scheduler*), vk::Queue*, marl::Scheduler*>&, std::_fl::__tuple_indices<2ul, 3ul>) (__t=...) at ../../third_party/libcxx/include/thread:284
#12 std::_fl::__thread_proxy[abi:v15000]<std::_fl::tuple<std::_fl::unique_ptr<std::_fl::__thread_struct, std::_fl::default_delete<std::_fl::__thread_struct> >, void (vk::Queue::*)(marl::Scheduler*), vk::Queue*, marl::Scheduler*> >(void*) (__vp=0x55fc6f427050) at ../../third_party/libcxx/include/thread:295
#13 0x00007fc9e60c93ec in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:444
#14 0x00007fc9e6149a4c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81
This seems to have started happening after flutter/engine@81035b7 landed (which is not directly related to Impeller).