mirror of
https://github.com/hanzoai/wasm2go.git
synced 2026-10-30 15:06:48 +00:00
bd85549918
* wasm2go: a WebAssembly-to-Go ahead-of-time transpiler wasm2go translates a WebAssembly binary into standalone Go source. The generated package runs the module natively — no interpreter and no embedded wasm runtime — so it builds and links like ordinary Go code. This makes it practical to ship a wasm-compiled library (for example a large C/C++ codebase built with the WASI SDK) inside a Go program without the startup and memory cost of a wasm engine. Components: - internal/wasm — the WebAssembly binary parser. - internal/codegen — translates a parsed module into Go source through the SSA lowering + optimization + emission pipeline. - internal/ssa — a lightweight SSA IR plus optimization passes (const-propagation, DCE, CSE, branch folding, memory promotion). - transpile — the public library API: Parse, Translate, and the Transpile one-shot convenience wrapper. - cmd/wasm2go — the command-line interface. - internal/testfixture — shared helper that compiles testdata/*.wat to wasm on demand via wat2wasm. Library API (Options): - Required: Package, OutputImportPath. - Optional: BulkExportPrefix (per-export Inv_<svc>_<mt> dispatch for modules with uniformly-named exports), EntryExports (narrow DCE root set), KeepDeadFuncs (disable DCE for diff/debug), PromotionReportPath (write SSA memory-promotion JSON). Everything else is auto-derived from the input: the SSA pipeline runs unconditionally; data segments emit as //go:embed sidecars; wasi imports translate to Go-native syscalls; modules whose total function-body bytes exceed an internal threshold are emitted as a chain of //go:linkname-split sub-packages so the Go compiler stays inside a bounded per-package memory budget. WASI runtime: full wasi_snapshot_preview1 coverage. Args/environ, clocks, fd_*, path_* (open/create_directory/unlink_file/ remove_directory/rename/filestat_get/filestat_set_times/link/ symlink/readlink), readdir, pread/pwrite, sync/datasync, poll_oneoff (clock + fd-event branches), sched_yield, random_get, proc_exit, proc_raise, sock_accept/recv/send/shutdown — every call routes to the Go stdlib or golang.org/x/sys/unix equivalent. Per-platform companion files (unix/linux/darwin/windows) carry the bits that differ across OSes; the translated module is a normal Go program with the host's ordinary filesystem and network reach. Release engineering for the public repository: - GitHub Actions CI: build, vet, race-enabled tests behind an 85% coverage gate, golangci-lint — all driven through make targets. - Release workflow runs GoReleaser on version tags, including deb/rpm/apk packages, with build-provenance attestations recorded for every release asset. - A release-test workflow runs `make release/check` (GoReleaser config validation + a publish-free dry-run build) on every PR and main push so a broken release is caught before tag time. - golangci-lint and goreleaser are pinned in tools/go.mod and run via `go tool`, so local and CI invocations use the same versions. - `make install/wat2wasm` provisions the wat2wasm CLI the test suite needs, dispatching to the host's package manager (Homebrew on macOS, apt/dnf/pacman/apk on Linux). - Makefile targets for local development. Test coverage is 85.2% of statements overall. * README: document the WASI runtime, performance, and library entry points - Add a "WASI support" subsection explaining the single-file, stdlib-only `wasi_snapshot_preview1` implementation and the resulting cross-platform reach. - Add a "Performance" section with the wazero-vs-wasm2go corpus numbers (cold start 8.4×, short queries up to 81×, TPC-H scans within ±10%). Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]> * ci: align release-test with release.yml — use stable Go The release-test workflow exercises the same `make release/check` dry-run that the publish job runs at tag time, so it should pull the same toolchain. Switch it from `go-version-file: tools/go.mod` to `go-version: stable` to match release.yml. Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]> --------- Co-authored-by: Claude Opus 4.7 (1M context) <[email protected]>
69 lines
1.9 KiB
Go
69 lines
1.9 KiB
Go
package codegen
|
|
|
|
import (
|
|
"bytes"
|
|
"testing"
|
|
|
|
"github.com/goccy/wasm2go/internal/testfixture"
|
|
"github.com/goccy/wasm2go/internal/wasm"
|
|
)
|
|
|
|
// TestComputeReachableFuncs checks whole-function reachability on the
|
|
// deadfunc.wasm fixture:
|
|
//
|
|
// used — exported → reachable (root)
|
|
// helper — called by `used` → reachable (transitive)
|
|
// tabled — only in the table → reachable (call_indirect root)
|
|
// dead — none of the above → NOT reachable, droppable
|
|
func TestComputeReachableFuncs(t *testing.T) {
|
|
bin := testfixture.Wasm(t, "deadfunc")
|
|
mod, err := wasm.Parse(bytes.NewReader(bin))
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
reachable, err := computeReachableFuncs(mod, nil, nil)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
// Resolve each name to its local (defined) index via the exports +
|
|
// the known module layout. deadfunc.wat defines functions in
|
|
// source order: used=0, helper=1, tabled=2, dead=3 (no imports).
|
|
if mod.NumImportedFuncs != 0 {
|
|
t.Fatalf("fixture expected 0 imported funcs, got %d", mod.NumImportedFuncs)
|
|
}
|
|
const (
|
|
used = 0
|
|
helper = 1
|
|
tabled = 2
|
|
dead = 3
|
|
)
|
|
for _, tc := range []struct {
|
|
name string
|
|
local uint32
|
|
want bool
|
|
}{
|
|
{"used", used, true},
|
|
{"helper", helper, true},
|
|
{"tabled", tabled, true},
|
|
{"dead", dead, false},
|
|
} {
|
|
if got := reachable[tc.local]; got != tc.want {
|
|
t.Errorf("%s (local %d): reachable=%v, want %v", tc.name, tc.local, got, tc.want)
|
|
}
|
|
}
|
|
if len(reachable) != 3 {
|
|
t.Errorf("expected 3 reachable functions, got %d", len(reachable))
|
|
}
|
|
|
|
// With `used` named as the sole entry export, the result is the
|
|
// same here (tabled stays live via the table, helper via the call).
|
|
narrowed, err := computeReachableFuncs(mod, map[string]bool{"used": true}, nil)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if narrowed[dead] {
|
|
t.Errorf("dead function reachable under narrowed entry set")
|
|
}
|
|
}
|