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Pure Elixir implementation that decodes .wasm binaries into structured
data — types, imports, exports, function bodies with decoded opcodes,
memories, tables, globals, data segments, and custom sections.
Opcodes use the same {offset, name, ...operands} tuple format as
QuickBEAM.Bytecode.
- QuickBEAM.WASM.disasm/1 — full module disassembly
- QuickBEAM.WASM.validate/1 — structural validation
- QuickBEAM.WASM.exports/1 — list module exports
- QuickBEAM.WASM.imports/1 — list module imports
- QuickBEAM.WASM.Module — decoded module struct
- QuickBEAM.WASM.Function — decoded function struct
- QuickBEAM.WASM.Parser — LEB128, sections, all MVP opcodes
Vendor WAMR (WebAssembly Micro Runtime) in interpreter mode and expose compile/start/call/stop/memory APIs as NIFs. - Vendor WAMR core: interpreter, common runtime, platform layer, memory allocator, utils (~57KB code footprint) - C bridge (wamr_bridge.c) wraps WAMR embedding API - Zig NIF layer (wasm_nif.zig) with WasmModule/WasmInstance resources - Elixir API: QuickBEAM.WASM.compile/1, start/2, call/3, stop/1, memory_size/1, memory_grow/2, read_memory/3, write_memory/3 All 27 WASM tests pass (19 parser + 8 runtime).
Implements the standard WebAssembly JS API as a TypeScript polyfill
backed by WAMR through Beam.callSync handlers.
Supported:
- WebAssembly.compile(bytes) → Promise<Module>
- WebAssembly.instantiate(bytes|module, imports?) → Promise<{module, instance}>
- WebAssembly.validate(bytes) → boolean
- new WebAssembly.Module(bytes)
- new WebAssembly.Instance(module)
- WebAssembly.Module.exports(mod)
- instance.exports.funcName(...args)
- WebAssembly.Memory, Table, Global constructors
- CompileError, LinkError, RuntimeError error types
7 new JS API tests (34 total).
- QuickBEAM.WASM.start/1 returns a pid (like QuickBEAM.start/1) - QuickBEAM.WASM.call/3 goes through GenServer (like QuickBEAM.call/3) - QuickBEAM.WASM.stop/1 stops the GenServer - child_spec/1 and start_link/1 for supervision trees - Named instances: start(module: bytes, name: :my_wasm) - Raw NIF compile/start are internal (@doc false) 36 tests (19 parser + 7 runtime + 7 JS API + 3 supervision).
drain_jobs() silently swallowed exceptions thrown during JS_ExecutePendingJob (ret < 0 treated as ret == 0). Add drain_jobs_or_set_error() that detects negative return values and extracts the exception from the correct JSContext. Replace drain_jobs() in do_eval, do_call, do_load_bytecode, and do_load_module. Also factor set_error_term into set_error_term_from_ctx to handle exceptions from a different context than self.ctx.
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Pure Elixir WASM parser + WAMR-backed runtime + browser-style
WebAssemblyAPI inside QuickBEAM runtimes and contexts.WebAssemblynamespace withModule,Instance,Memory,Global, streaming APIs, and custom sectionsi32,i64,f32, andf64wamr_bridge.creduced to WAMR ABI glueVerified:
QUICKBEAM_BUILD=1 mix compileMIX_ENV=test QUICKBEAM_BUILD=1 mix compileQUICKBEAM_BUILD=1 mix test test/wasm_test.exsQUICKBEAM_BUILD=1 mix test --no-start --exclude napi_addon --exclude napi_sqlite test/wasm_test.exsQUICKBEAM_BUILD=1 mix test test/wasm_test.exs test/quickbeam_test.exsbun run lint