[browser] event pipe - JavaScript part

[pavelsavara]

usage

    <WasmPerfTracing>true</WasmPerfTracing>
    <WasmPerfInstrumentation>N:Sample</WasmPerfInstrumentation>
    <MetricsSupport>true</MetricsSupport>
    <EventSourceSupport>true</EventSourceSupport>

browser dev tools console usage

globalThis.getDotnetRuntime(0).collectGcDump()
globalThis.getDotnetRuntime(0).collectPerfCounters({durationSeconds: 60})
globalThis.getDotnetRuntime(0).collectCpuSamples({durationSeconds: 60})

host machine usage

dotnet.withEnvironmentVariable("DOTNET_DiagnosticPorts", "ws://127.0.0.1:8088/diagnostics")

dotnet-dsrouter server-websocket -ws http://127.0.0.1:8088/diagnostics
dotnet-gcdump collect -v -p 29364
dotnet-trace collect -p 29364
dotnet-counters collect -p 29364

Implementation

• client side JS implementation of dotnet-gcdump, dotnet-trace, dotnet-counters, this is about formating binary messages that DS/EP could understand.
• WebSocket connectivity to ds-rounter
• in-tree sample browser-eventpipe
• mono_wasm_process_current_pid

Contributes to #76316

[ghost]

Note regarding the new-api-needs-documentation label:

This serves as a reminder for when your PR is modifying a ref *.cs file and adding/modifying public APIs, please make sure the API implementation in the src *.cs file is documented with triple slash comments, so the PR reviewers can sign off that change.

[ghost]

Note regarding the new-api-needs-documentation label:

This serves as a reminder for when your PR is modifying a ref *.cs file and adding/modifying public APIs, please make sure the API implementation in the src *.cs file is documented with triple slash comments, so the PR reviewers can sign off that change.

[dotnet-policy-service]

Tagging subscribers to 'arch-wasm': @lewing
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[Copilot]

Copilot reviewed 16 out of 19 changed files in this pull request and generated 1 comment.

Files not reviewed (3)

• src/mono/sample/wasm/browser-advanced/Wasm.Advanced.Sample.csproj: Language not supported
• src/mono/sample/wasm/browser-eventpipe/Wasm.Browser.EventPipe.Sample.csproj: Language not supported
• src/mono/sample/wasm/browser-eventpipe/index.html: Language not supported

[javiercn]

-p 29364

This is the PID of the dsrouter, isn't it?

[maraf]

Just naming nits

[javiercn]

Looks good to my limited understanding of this area.

[maraf]

Looks good to me 👍

[pavelsavara]

/ba-g CI timeouts