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[MG_Remote, MG_Impl, MG_Backend] (Disaggregated): P5c ev - SEG_EVENT is the only reverse channel

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The three reverse MGPipeCallbacks entries become the SERVER session's producer callbacks
(Reserve + fill the head + copy the payload inline + PublishEvents; the host pointer never
reaches the wire), installed at Accept and uninstalled at Close, a second installation
over a claimed entry being Fatal{RoleViolation, callback-double-install}. Producers wired:
buffer writeback (the mapped bytes are copied into the record's inline tail instead of a
raw pointer in MGPBlobRef::Offset), GPU-written (Magma's three direct MarkGpuWritten
bypasses are routed through the callback), surface-changed (the backend posts
MGPSurfaceInfo; the client consumer replays the allocate/format writes against
pDefaultFramebufferInfo on the GL thread, where R3's ownership always was), and
kEventGlError = 4 for PipeInputs::RecordError (ordering stays P9's).
PipeInputs::InvalidateCompileEnv's forward is deleted with an active transport - R-12's
caps re-publication already does its job. The consumer's monolith guard is replaced by
the three segment arms (kSegEvent resolves through the session's SegmentTable;
kMGHostSpanSegNone is monolith-only and Fatal{ProtocolCorruption} on the wire; anything
else the same), and DrainEventRing calls the client consumers BY NAME, never through the
global table. Overflow is Fatal{EventRingOverflow} - P5c's events are lossless, P9 owns
the drop policy. Monolith arms keep the pre-P5c expressions character for character.

Evidence: unit 2139/2139 (incl. the new kEventGlError round-trip), integration-split
107/107, monolith GPU subset 24/24; negative control executed - a writeback blobref
reverted to the raw-pointer shape turns DirectGLES.Split.AtomicCounterScenario.
SubDataAfterDispatchSurvivesAnImmediateReadback red with Fatal{ProtocolCorruption,
OnBufferWriteback.Seg}. CONTRACT-P5C sections 1, 4.
This commit is contained in:
swung0x48
2026-09-17 03:55:30 -04:00
parent 851bc70c1d
commit 930ad0193f
12 changed files with 646 additions and 71 deletions
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MobileGL/MG_Backend/DirectVulkan/Renderer/SwapchainObject.cpp
+43 -15
View File
@@ -11,6 +11,11 @@
#include "MG_Impl/GLImpl/Framebuffer/GL_Framebuffer.h"
#include "MG_State/GLState/TextureState/TextureObject2D.h"
#if MOBILEGL_PIPE_PUSH
// P5c ev: the surface-changed event's producer callback, installed by the server session.
#include <MG_Pipe/MGPipeCallbacks.h>
#endif
#if defined(__has_include)
#if __has_include(<vulkan/vk_enum_string_helper.h>)
#include <vulkan/vk_enum_string_helper.h>
@@ -280,11 +285,6 @@ namespace MobileGL::MG_Backend::DirectVulkan {
static_cast<SizeT>(defaultFramebufferExtent.width) *
static_cast<SizeT>(defaultFramebufferExtent.height) * 4;
auto* colorTex = static_cast<MG_State::GLState::TextureObject2D*>(defaultFBOInfo->colorAttachment.get());
colorTex->AllocateStorage(
TextureUploadTarget::Texture2D, 0, {
{extentWidth, extentHeight, 1},
defaultAttachmentByteSize}); // TODO: 4 is format size
TextureInternalFormat depthFormat = TextureInternalFormat::Depth24Stencil8;
switch (m_depthStencilFormat) {
case VK_FORMAT_D24_UNORM_S8_UINT:
@@ -300,11 +300,6 @@ namespace MobileGL::MG_Backend::DirectVulkan {
depthFormat = TextureInternalFormat::Depth24Stencil8;
break;
}
auto* depthTex = static_cast<MG_State::GLState::TextureObject2D*>(defaultFBOInfo->depthAttachment.get());
depthTex->SetInternalFormat(depthFormat);
depthTex->AllocateStorage(TextureUploadTarget::Texture2D, 0, {
{extentWidth, extentHeight, 1},
defaultAttachmentByteSize}); // TODO: 4 is format size
// The default FBO's stencil attachment must track the swapchain extent:
// FramebufferObject::CheckCompleteness requires every valid attachment
@@ -324,11 +319,44 @@ namespace MobileGL::MG_Backend::DirectVulkan {
stencilFormat = depthFormat;
break;
}
auto* stencilTex = static_cast<MG_State::GLState::TextureObject2D*>(defaultFBOInfo->stencilAttachment.get());
stencilTex->SetInternalFormat(stencilFormat);
stencilTex->AllocateStorage(TextureUploadTarget::Texture2D, 0, {
{extentWidth, extentHeight, 1},
defaultAttachmentByteSize}); // TODO: 4 is format size
#if MOBILEGL_PIPE_PUSH
if (MG_Pipe::gMGPipeCallbacks.OnSurfaceChanged != nullptr) {
// P5c ev (CONTRACT-P5C §4.2): with an active transport the default FBO's
// attachments are CLIENT memory and this thread may not write them - the backend
// fills MGPSurfaceInfo and posts, and the client's consumer replays exactly the
// allocate/format writes of the monolith arm below on the GL thread. The two
// formats are always equal by the switches above, so one InternalFormat carries
// both. The callback's presence IS the transport probe - the server session
// installs it at Accept, and under monolith nobody ever does.
MG_Pipe::MGPSurfaceInfo info{};
info.Width = defaultFramebufferExtent.width;
info.Height = defaultFramebufferExtent.height;
info.InternalFormat = static_cast<Uint32>(depthFormat);
info.Samples = 1;
info.Layers = 1;
info.IsDefault = 1;
MG_Pipe::gMGPipeCallbacks.OnSurfaceChanged(&info);
} else
#endif
{
auto* colorTex = static_cast<MG_State::GLState::TextureObject2D*>(defaultFBOInfo->colorAttachment.get());
colorTex->AllocateStorage(
TextureUploadTarget::Texture2D, 0, {
{extentWidth, extentHeight, 1},
defaultAttachmentByteSize}); // TODO: 4 is format size
auto* depthTex = static_cast<MG_State::GLState::TextureObject2D*>(defaultFBOInfo->depthAttachment.get());
depthTex->SetInternalFormat(depthFormat);
depthTex->AllocateStorage(TextureUploadTarget::Texture2D, 0, {
{extentWidth, extentHeight, 1},
defaultAttachmentByteSize}); // TODO: 4 is format size
auto* stencilTex = static_cast<MG_State::GLState::TextureObject2D*>(defaultFBOInfo->stencilAttachment.get());
stencilTex->SetInternalFormat(stencilFormat);
stencilTex->AllocateStorage(TextureUploadTarget::Texture2D, 0, {
{extentWidth, extentHeight, 1},
defaultAttachmentByteSize}); // TODO: 4 is format size
}
}