[wasm][coreclr] callhelpers generator, pinvoke part

[radekdoulik]

Generate src/coreclr/vm/wasm/callhelpers-pinvoke.cpp and use it instead of hardcoded native libs entrypoints.c

[Copilot]

Pull request overview

This PR implements code generation for WASM/CoreCLR PInvoke tables instead of using hardcoded native library entrypoints. The generator scans managed assemblies and creates C++ files that map library names to their native function entry points.

Changes:

• Modified the PInvoke table generator to split generation into separate files for PInvoke and reverse PInvoke (callbacks)
• Added callhelpers-pinvoke.cpp generation that provides callhelpers_pinvoke_override function for resolving native library imports
• Updated build system to conditionally compile the generated PInvoke table when GEN_PINVOKE=1
• Removed libz module dependency (now covered by System.IO.Compression.Native) and added System.Native.Browser module
• Modified native library build to use empty.c stub when generator is enabled

Reviewed changes

Copilot reviewed 12 out of 13 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/tasks/WasmAppBuilder/coreclr/PInvokeTableGenerator.cs	Refactored Generate method to create separate PInvoke and reverse PInvoke files; updated C++ output format to use minipal entrypoints; added QCall filtering
src/tasks/WasmAppBuilder/coreclr/ManagedToNativeGenerator.cs	Added ReversePInvokeOutputPath parameter to support separate reverse PInvoke generation
src/tasks/WasmAppBuilder/WasmAppBuilder.csproj	Updated module list (added System.Native.Browser, removed libz) and configured output paths for generated files
src/native/libs/System.Native.Browser/CMakeLists.txt	Added empty.c as source when GEN_PINVOKE is enabled to provide stub implementation
src/native/libs/CMakeLists.txt	Removed CORERUN_LIBS_ONLY condition for System.IO.Compression.Native to ensure it's always built
src/coreclr/vm/wasm/callhelpers-reverse.cpp	Regenerated with updated hash values for reverse thunk entries
src/coreclr/vm/wasm/callhelpers-pinvoke.cpp	New generated file containing PInvoke tables and callhelpers_pinvoke_override implementation
src/coreclr/vm/pinvokeoverride.cpp	Excluded GlobalizationResolveDllImport for WASM targets (now handled by generated code)
src/coreclr/vm/CMakeLists.txt	Conditionally includes callhelpers-pinvoke.cpp when GEN_PINVOKE is set
src/coreclr/hosts/corerun/wasm/pinvoke_override.cpp	Simplified to declare and use callhelpers_pinvoke_override from generated code
src/coreclr/hosts/corerun/CMakeLists.txt	Added System.IO.Compression.Native-Static and System.Native.Browser-Static dependencies
src/coreclr/CMakeLists.txt	Enabled GEN_PINVOKE flag for Browser/WASM builds

Comments suppressed due to low confidence (1)

src/coreclr/hosts/corerun/CMakeLists.txt:67

• System.Native.Browser-Static is already linked at line 57. This duplicate link specification is redundant and should be removed to avoid unnecessary repetition.

            target_link_libraries(corerun PRIVATE
                System.Native.Browser-Static)

[pavelsavara]

Log

[17:00:06] info: [FAIL] System.Runtime.InteropServices.JavaScript.Tests.JSExportTest.JsExportNullableInt32(value: null)
[17:00:06] info: System.DllNotFoundException : Unable to load shared library 'libSystem.Runtime.InteropServices.JavaScript.Native' or one of its dependencies. In order to help diagnose loading problems, consider using a tool like strace. If you're using glibc, consider setting the LD_DEBUG environment variable:
[17:00:06] info: dynamic linking not enabled
[17:00:06] info: 
[17:00:06] info:    at System.Runtime.InteropServices.JavaScript.JSFunctionBinding.BindJSImportImpl(String functionName, String moduleName, ReadOnlySpan`1 signatures)
[17:00:06] info:    at System.Runtime.InteropServices.JavaScript.JSFunctionBinding.BindJSFunction(String functionName, String moduleName, ReadOnlySpan`1 signatures)
[17:00:06] info:    at System.Runtime.InteropServices.JavaScript.JavaScriptImports.DynamicImport(String moduleName, String moduleUrl)
[17:00:06] info:    at System.Runtime.InteropServices.JavaScript.JSHostImplementation.ImportAsync(String moduleName, String moduleUrl, CancellationToken cancellationToken)
[17:00:06] info:    at System.Runtime.InteropServices.JavaScript.Tests.JavaScriptTestHelper.InitializeAsync()
[17:00:06] info:    at System.Runtime.InteropServices.JavaScript.Tests.JSInteropTestBase.InitializeAsync()

I suspect this PR broke the build
#123421

[radekdoulik]

Yes indeed, build analysis resolved it as known issue #111449