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[browser] introduce JSProxyContext #95959

Merged
merged 26 commits into from
Dec 20, 2023
Merged

[browser] introduce JSProxyContext #95959

merged 26 commits into from
Dec 20, 2023

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pavelsavara
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@pavelsavara pavelsavara commented Dec 13, 2023 •
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  • introduce JSProxyContext which collects all proxies and handles relevant to particular WebWorker/UI thread
  • introduce thread local JSProxyContext.OperationStack to know the context of the current operation.
    • most of the time, this matches the current thread
    • sometimes, we pass JSObject instance to JSImport. Such instance already has thread affinity
    • we will use JSProxyContext.CaptureContextFromParameter to capture the target thread to call into.
    • The dispatch to it is next PR.
  • move all handle related code into JSProxyContext
  • use target JSProxyContext instance as a lock around operations with handles.
  • introduced JSObject.ProxyContext also for non-MT build. It simplifies the #if FEATURE_WASM_THREADS hell.
  • make CancelablePromise more async
  • drop IsThreadCaptured it was bit misleading
  • new mono_wasm_invoke_method_raw which doesn't require existing JSProxyContext, for early calls.
  • new push_operation, pop_operation to be called before JSExport calls
  • renamed install_synchronization_context -> install_main_synchronization_context

@pavelsavara pavelsavara added arch-wasm WebAssembly architecture area-System.Runtime.InteropServices.JavaScript os-browser Browser variant of arch-wasm labels Dec 13, 2023
@pavelsavara pavelsavara added this to the 9.0.0 milestone Dec 13, 2023
@pavelsavara pavelsavara self-assigned this Dec 13, 2023
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ghost commented Dec 13, 2023

Tagging subscribers to 'arch-wasm': @lewing
See info in area-owners.md if you want to be subscribed.

Issue Details
  • introduce JSProxyContext which collects all proxies and handles relevant to particular WebWorker/UI thread
  • introduce thread local JSProxyContext.CapturedInstance to know the context of the current operation.
    • most of the time, this matches the current thread
    • sometimes, we pass JSObject instance to JSImport. Such instance already has thread affinity and we will use it to capture the target thread to call into.
  • move all handle related code into JSProxyContext
  • use target JSProxyContext instance as a lock around operations with handles.
  • introduced JSObject.ProxyContext also for non-MT build. It simplifies the #if FEATURE_WASM_THREADS hell.
  • make CancelablePromise more async
  • drop IsThreadCaptured it was bit misleading
  • new mono_wasm_invoke_method_raw which doesn't require existing JSProxyContext, for early calls.
  • new capture_proxy_context to be called before JSExport call
  • renamed install_synchronization_context -> install_main_synchronization_context
Author: pavelsavara
Assignees: pavelsavara
Labels:

arch-wasm, area-System.Runtime.InteropServices.JavaScript, os-browser
Milestone: 9.0.0

@pavelsavara pavelsavara mentioned this pull request Dec 13, 2023
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/azp run runtime-wasm

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@pavelsavara pavelsavara marked this pull request as ready for review December 13, 2023 16:43
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/azp run runtime-wasm

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@pavelsavara
remove complexity of PendingOperation maintanance
f56baa1 
 - new JSMarshalerArgumentImpl.ContextHandle field
 - all calls from JS side will set JSMarshalerArgumentImpl.ContextHandle with current thread context
     - via set_arg_proxy_context
 - all calls to JS where runtime calls stackalloc JSMarshalerArgument will set JSMarshalerArgumentImpl.ContextHandle with Context of promise or function affinity
    - it will use InitializeWithContext, JSImportNoCapture
    - these are Task and Function callbacks to JS
 - JSMarshalerArgument.ToManaged always uses new JSMarshalerArgument.ToManagedContext
 - JSMarshalerArgument.ToManagedContext always uses JSMarshalerArgumentImpl.ContextHandle, no magic
 - JSMarshalerArgument.ToJS always uses new JSMarshalerArgument.ToJSContext
 - JSMarshalerArgument.ToJSContext during JSImport uses JSProxyContext.CurrentOperationContext otherwise JSMarshalerArgumentImpl.ContextHandle
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/azp run runtime-wasm

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/azp run runtime-wasm

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feedback
9b8e3ad 
cancellation thread safe
Active issue dotnet#96173
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/azp run runtime-wasm

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pavelsavara commented Dec 19, 2023 •
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Filed new issues
#96173
#96190
#96191

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/azp run runtime-wasm

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@pavelsavara pavelsavara merged commit 8bd23f0 into dotnet:main Dec 20, 2023
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@pavelsavara pavelsavara deleted the browser_proxy_context branch December 20, 2023 07:57
This was referenced Jan 3, 2024
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Reviewers

@kg kg kg approved these changes

@maraf maraf maraf approved these changes

@lambdageek lambdageek Awaiting requested review from lambdageek

@lewing lewing Awaiting requested review from lewing lewing is a code owner

@marek-safar marek-safar Awaiting requested review from marek-safar

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@pavelsavara pavelsavara

Labels
arch-wasm WebAssembly architecture area-System.Runtime.InteropServices.JavaScript os-browser Browser variant of arch-wasm
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