mirror of
https://github.com/LadybirdBrowser/ladybird
synced 2026-04-26 01:35:08 +02:00
6cdfbd01a6
Implement a complete Rust reimplementation of the LibJS frontend: lexer, parser, AST, scope collector, and bytecode code generator. The Rust pipeline is built via Corrosion (CMake-Cargo bridge) and linked into LibJS as a static library. It is gated behind a build flag (ENABLE_RUST, on by default except on Windows) and two runtime environment variables: - LIBJS_CPP: Use the C++ pipeline instead of Rust - LIBJS_COMPARE_PIPELINES=1: Run both pipelines in lockstep, aborting on any difference in AST or bytecode generated. The C++ side communicates with Rust through a C FFI layer (RustIntegration.cpp/h) that passes source text to Rust and receives a populated Executable back via a BytecodeFactory interface.
30 lines
1.4 KiB
Plaintext
30 lines
1.4 KiB
Plaintext
JS bytecode executable ""
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[ 0] 0: GetLexicalEnvironment dst:reg4
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[ 8] GetGlobal dst:reg6, identifier:f
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[ 18] Call dst:reg5, callee:reg6, this_value:Undefined, f, arguments:[Int32(1), Int32(2), Int32(3)]
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[ 48] End value:reg5
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JS bytecode executable "f"
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[ 0] 0: GetLexicalEnvironment dst:reg4
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[ 8] CreateVariable identifier:a, is_immutable:false, is_global:false, is_strict:false
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[ 18] CreateVariable identifier:b, is_immutable:false, is_global:false, is_strict:false
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[ 28] CreateVariable identifier:c, is_immutable:false, is_global:false, is_strict:false
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[ 38] InitializeLexicalBinding identifier:a, src:arg0
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[ 50] InitializeLexicalBinding identifier:b, src:arg1
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[ 68] InitializeLexicalBinding identifier:c, src:arg2
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[ 80] Mov dst:inner~0, src:Undefined
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[ 90] NewFunction dst:reg5, shared_function_data_index:0, lhs_name:inner
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[ a8] Mov dst:inner~0, src:reg5
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[ b8] Mov dst:reg6, src:inner~0
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[ c8] Call dst:reg5, callee:reg6, this_value:Undefined, inner
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[ e8] Return value:reg5
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JS bytecode executable "inner"
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[ 0] 0: GetLexicalEnvironment dst:reg4
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[ 8] GetBinding dst:reg5, identifier:a
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[ 20] GetBinding dst:reg6, identifier:b
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[ 38] Add dst:reg7, lhs:reg5, rhs:reg6
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[ 48] GetBinding dst:reg5, identifier:c
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[ 60] Add dst:reg6, lhs:reg7, rhs:reg5
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[ 70] Return value:reg6
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