CNA-BUG-209: Inspector ServerHello.graphicsRenderer reports the compile-time default renderer, not the one GraphicsRendererSelection actually created

CNA snapshot 009d40f5  ·  Known Issues › Current bugs  ·  source links pinned to 009d40f5

The Inspector session names the build's default renderer identity, so in a multi-renderer build where a preference, the environment variable or a fallback selects another renderer, the Session view shows the wrong one.

Identifier

CNA-BUG-209

Category

Bug

Subsystem

Diagnostics & Inspector

Status

Open

Verified against

CNA 009d40f5 (009d40f5dd085c4e674d3479675fac84b12b3e0a)

Severity

Low (a triage suggestion, not a project priority)

Evidence basis

Source-verified: read at TARGET, not executed

Tests touching this area

Yes: see Current tests

Affected contract

CNA::Inspector::HelloResponse::graphicsRenderer (the Session view's renderer) versus CNA::GraphicsRendererSelection::GetActive()

Expected behaviour

The Session view's renderer is the one the application runs on: GraphicsRendererSelection::GetActive() once a device exists (GetSelected() before, since GetActive() throws until the selection is latched).

Actual behaviour at TARGET

Agent::Impl::HandleClient sets hello.graphicsRenderer = CNA::getCurrentGraphicsRendererName(), a compile-time constant derived from the CNA_RENDERER_* macro that cmake/RendererSelection.cmake defines project-wide for the default identity only. In a multi-renderer build (CNA_MULTI_RENDERER), GraphicsRendererSelection::SetPreferred, the CNA_GRAPHICS_RENDERER environment variable or an enabled fallback chain can make the created renderer differ, and the Session view still shows the default. Single-renderer builds report correctly.

Source locations

• modules/inspector/src/Agent.cpp — Agent::Impl::HandleClient fills graphicsRenderer
• modules/core/include/CNA/GraphicsRendererType.hpp — getCurrentGraphicsRendererName is compile-time
• modules/core/include/CNA/GraphicsRendererSelection.hpp — GetSelected, GetActive
• cmake/RendererSelection.cmake — default identity macro project-wide; CNA_MULTI_RENDERER
• docs/inspector.md — UI views: Session shows the renderer

Evidence

Checked by reading Agent.cpp, GraphicsRendererType.hpp, GraphicsRendererSelection.hpp and RendererSelection.cmake at 009d40f5. Not executed.

Focused reproduction

No focused reproduction is known. Nothing has been invented here; the evidence above is what exists.

Current tests

NegotiatesProviderVersionAndCapabilities checks the provider version and capabilities, not graphicsRenderer; no Inspector test runs in a multi-renderer configuration.

Regression test

In a multi-renderer build: prefer a non-default identity, create a device, start the agent, connect, and expect the session renderer to equal GraphicsRendererSelection::GetActive().

Blast radius

Multi-renderer builds that use the Inspector, where the Session view misstates the renderer (for example after a fallback); metrics, events and resources are unaffected.

Workaround

Start the agent after the device exists and add the name of GraphicsRendererSelection::GetActive() to AgentConfiguration::metadata.