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[Fix, Test] (MG_Backend/DirectVulkan): never bind or cache a null pipeline, and name the modules a failed vkCreateGraphicsPipelines rejected

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swung0x48
2026-08-11 02:33:32 -04:00
parent ed29e63543
commit 7c5fc03b26
7 changed files with 270 additions and 2 deletions
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MobileGL/MG_Backend/DirectVulkan/Renderer/PipelineFactory.cpp
+38
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@@ -252,6 +252,19 @@ namespace MobileGL::MG_Backend::DirectVulkan {
}
VkPipeline pipeline = CreatePipeline(payload);
// A failed creation must never be memoized. Caching VK_NULL_HANDLE served the null back for
// the rest of the process, so one transient driver rejection turned every later draw with
// the same state into a vkCmdBindPipeline(VK_NULL_HANDLE) - the SIGSEGV behind 9 of the 15
// CTS process deaths. Retrying costs one failed vkCreateGraphicsPipelines per draw, which
// is the correct price for a broken pipeline and is bounded by the draw itself being
// skipped.
if (pipeline == VK_NULL_HANDLE) {
MGLOG_I("PipelineFactory::GetOrCreatePipeline: creation failed for hash=0x%llx "
"programHash=0x%llx; not caching the failure",
static_cast<unsigned long long>(hash),
static_cast<unsigned long long>(payload.programHash));
return VK_NULL_HANDLE;
}
m_cache.emplace(hash, PipelineCacheEntry{pipeline, payload.programHash, payload.renderPass,
m_frameCounter});
return pipeline;
@@ -507,6 +520,31 @@ namespace MobileGL::MG_Backend::DirectVulkan {
MGLOG_F("PipelineFactory::CreatePipeline vertex input: bindingCount=%u attributeCount=%u",
payload.vertexInputState->vertexBindingDescriptionCount,
payload.vertexInputState->vertexAttributeDescriptionCount);
// The driver's own answer is VK_ERROR_UNKNOWN, i.e. no information at all, so the only
// way to work out WHICH shader it choked on (the open sampler-array-in-struct
// investigation) is to name the modules. MGLOG_I, not _D/_E: this must survive in the
// INFO-level builds that CTS actually runs against.
if (payload.stageSpirvDigests) {
for (SizeT i = 0; i < payload.stageSpirvDigests->size(); ++i) {
const auto& digest = (*payload.stageSpirvDigests)[i];
MGLOG_I("PipelineFactory::CreatePipeline spirv[%zu]: stage=0x%x words=%u bytes=%zu "
"hash=0x%llx",
i, digest.stage, digest.wordCount,
static_cast<SizeT>(digest.wordCount) * sizeof(Uint32),
static_cast<unsigned long long>(digest.hash));
}
} else {
MGLOG_I("PipelineFactory::CreatePipeline: no SPIR-V digests attached to the payload");
}
if (payload.stages) {
for (SizeT i = 0; i < payload.stages->size(); ++i) {
const auto& stage = (*payload.stages)[i];
MGLOG_I("PipelineFactory::CreatePipeline stage[%zu]: stage=0x%x module=%p entry=%s "
"specialization=%d",
i, static_cast<Uint32>(stage.stage), static_cast<const void*>(stage.module),
stage.pName ? stage.pName : "(null)", stage.pSpecializationInfo ? 1 : 0);
}
}
for (Uint32 i = 0; i < payload.colorAttachmentCount; ++i) {
const auto& attachment = payload.colorBlendAttachments[i];
MGLOG_F("PipelineFactory::CreatePipeline colorAttachment[%u]: blend=%d colorWriteMask=0x%x srcColor=%d dstColor=%d colorOp=%d srcAlpha=%d dstAlpha=%d alphaOp=%d",