feat(resolver): resolve prototype-based method calls, spread/iteration callbacks, func-prop this-dispatch, and object-rest param dispatch (JS) #1331
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@@ -42,6 +42,8 @@ import { | |
| parseFilesWasmForBackfill, | ||
| } from '../../../parser.js'; | ||
| import { computeConfidence } from '../../resolve.js'; | ||
| import type { CallNodeLookup } from '../call-resolver.js'; | ||
| import { findCaller, resolveByMethodOrGlobal } from '../call-resolver.js'; | ||
| import type { PipelineContext } from '../context.js'; | ||
| import { | ||
| batchInsertEdges, | ||
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@@ -558,6 +560,199 @@ function runPostNativeCha(db: BetterSqlite3Database): Set<number> { | |
| return newTargetIds; | ||
| } | ||
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| /** | ||
| * Post-pass: backfill prototype-based method definitions and their call edges. | ||
| * | ||
| * The Rust engine does not recognise `Foo.prototype.bar = function(){}` as a | ||
| * method definition, so those nodes are absent from the DB after the native | ||
| * orchestrator completes. This pass: | ||
| * 1. Re-parses JS/TS files via WASM to obtain the full ExtractorOutput | ||
| * (including definitions emitted by extractPrototypeMethodsWalk). | ||
| * 2. Inserts any method nodes that are missing from the DB. | ||
| * 3. Resolves call edges to those newly-inserted nodes using the WASM typeMap | ||
| * and the existing DB node table as a lookup. | ||
| */ | ||
| async function runPostNativePrototypeMethods( | ||
| db: BetterSqlite3Database, | ||
| rootDir: string, | ||
| ): Promise<void> { | ||
| // Collect JS/TS file paths from the DB — only extensions where prototype | ||
| // patterns can appear. | ||
| const jsExts = new Set(['.js', '.mjs', '.cjs', '.ts', '.tsx']); | ||
| const fileRows = db | ||
| .prepare( | ||
| `SELECT DISTINCT file FROM nodes WHERE kind = 'file' AND file IS NOT NULL ORDER BY file`, | ||
| ) | ||
| .all() as Array<{ file: string }>; | ||
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| const jsFiles = fileRows | ||
| .map((r) => r.file) | ||
| .filter((f) => jsExts.has(path.extname(f).toLowerCase())); | ||
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| if (jsFiles.length === 0) return; | ||
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| // Quick pre-filter: only re-parse files that actually contain prototype or | ||
| // function-as-object-property patterns to avoid an expensive WASM re-parse of | ||
| // every JS/TS file in large repos. Covers: | ||
| // - `.prototype.` — classical prototype method assignment | ||
| // - `\b\w+\.\w+\s*=\s*function` — function-as-object property (`f.g = function(){}`) | ||
| const protoFiles = jsFiles.filter((relPath) => { | ||
| try { | ||
| const content = readFileSafe(path.join(rootDir, relPath)); | ||
| return content.includes('.prototype.') || /\b\w+\.\w+\s*=\s*function/.test(content); | ||
| } catch { | ||
| return false; | ||
| } | ||
| }); | ||
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| if (protoFiles.length === 0) return; | ||
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| // WASM-parse only the files that have prototype patterns to get full | ||
| // ExtractorOutput including prototype method definitions and typeMap entries. | ||
| const absPaths = protoFiles.map((f) => path.join(rootDir, f)); | ||
| let wasmResults: Map<string, ExtractorOutput>; | ||
| try { | ||
| wasmResults = await parseFilesWasmForBackfill(absPaths, rootDir); | ||
| } catch (e) { | ||
| debug(`runPostNativePrototypeMethods: WASM parse failed: ${toErrorMessage(e)}`); | ||
| return; | ||
| } | ||
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| if (wasmResults.size === 0) return; | ||
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| // Check which nodes already exist — INSERT OR IGNORE handles races but | ||
| // we need the IDs of newly inserted rows, so we check first. | ||
| const existsStmt = db.prepare( | ||
| `SELECT id FROM nodes WHERE name = ? AND kind = 'method' AND file = ?`, | ||
| ); | ||
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| // Insert rows: [name, kind, file, line, end_line, parent_id, qualified_name, scope, visibility] | ||
| const newNodeRows: unknown[][] = []; | ||
| // Track which file+definition combos are new so we can insert edges for them. | ||
| const newDefs: Array<{ name: string; file: string; line: number }> = []; | ||
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| for (const [relPath, symbols] of wasmResults) { | ||
| for (const def of symbols.definitions ?? []) { | ||
| if (def.kind !== 'method') continue; | ||
| const dotIdx = def.name.indexOf('.'); | ||
| if (dotIdx === -1) continue; // skip bare method names (shouldn't happen, but guard) | ||
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| // Only insert if the node is not already in the DB. | ||
| const existing = existsStmt.get(def.name, relPath) as { id: number } | undefined; | ||
| if (existing) continue; | ||
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| const scope = def.name.slice(0, dotIdx); | ||
| newNodeRows.push([ | ||
| def.name, | ||
| 'method', | ||
| relPath, | ||
| def.line, | ||
| def.endLine ?? null, | ||
| null, | ||
| def.name, | ||
| scope, | ||
| null, | ||
| ]); | ||
| newDefs.push({ name: def.name, file: relPath, line: def.line }); | ||
| } | ||
| } | ||
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| if (newNodeRows.length === 0) return; | ||
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| db.transaction(() => batchInsertNodes(db, newNodeRows))(); | ||
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| // Build a name → node lookup from all DB nodes (including newly inserted ones). | ||
| type NodeEntry = { id: number; file: string; kind: string }; | ||
| const byNameMap = new Map<string, NodeEntry[]>(); | ||
| const byNameFileMap = new Map<string, NodeEntry[]>(); | ||
| const byIdKey = new Map<string, { id: number }>(); | ||
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| const allNodes = db | ||
| .prepare(`SELECT id, name, kind, file, line FROM nodes WHERE kind != 'file'`) | ||
| .all() as Array<{ id: number; name: string; kind: string; file: string; line: number }>; | ||
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| for (const n of allNodes) { | ||
| const list = byNameMap.get(n.name); | ||
| if (list) list.push(n); | ||
| else byNameMap.set(n.name, [n]); | ||
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| const fk = `${n.name}::${n.file}`; | ||
| const flist = byNameFileMap.get(fk); | ||
| if (flist) flist.push(n); | ||
| else byNameFileMap.set(fk, [n]); | ||
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| byIdKey.set(`${n.name}|${n.kind}|${n.file}|${n.line}`, { id: n.id }); | ||
| } | ||
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| const lookup: CallNodeLookup = { | ||
| byName: (name) => byNameMap.get(name) ?? [], | ||
| byNameAndFile: (name, file) => byNameFileMap.get(`${name}::${file}`) ?? [], | ||
| isBarrel: () => false, | ||
| resolveBarrel: () => null, | ||
| nodeId: (name, kind, file, line) => byIdKey.get(`${name}|${kind}|${file}|${line}`), | ||
| }; | ||
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| // Build a fast set of newly-inserted node IDs so we only emit edges to | ||
| // prototype nodes that the Rust engine missed (avoids duplicating existing edges). | ||
| const newNodeIds = new Set<number>( | ||
| newDefs.flatMap((d) => { | ||
| const nodes = byNameFileMap.get(`${d.name}::${d.file}`); | ||
| return nodes ? nodes.map((n) => n.id) : []; | ||
| }), | ||
| ); | ||
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| // seenByPair deduplicates edges we emit within this function only. | ||
| // No pre-existing edge can target a newly-inserted node ID (SQLite | ||
| // auto-increment guarantees the new IDs are unique), so there is no need | ||
| // to seed this set from the DB — doing so would load O(|edges|) data for | ||
| // zero benefit and could OOM on large repositories. | ||
| const seenByPair = new Set<string>(); | ||
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| // Resolve call edges in every file — not just those that define new prototype | ||
| // methods. A caller in app.js calling a prototype method defined in lib.js | ||
| // would be silently missed if we only scanned definition files. | ||
| // The newNodeIds guard inside the loop already prevents duplicate edges. | ||
| const newEdgeRows: unknown[][] = []; | ||
| const fileNodeStmt = db.prepare(`SELECT id FROM nodes WHERE kind = 'file' AND file = ?`); | ||
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| for (const [relPath, symbols] of wasmResults) { | ||
| const fileNodeRow = fileNodeStmt.get(relPath) as { id: number } | undefined; | ||
| if (!fileNodeRow) continue; | ||
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| const typeMap = symbols.typeMap instanceof Map ? symbols.typeMap : new Map(); | ||
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| for (const call of symbols.calls ?? []) { | ||
| if (!call.receiver) continue; // prototype resolution only applies to receiver calls | ||
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| const caller = findCaller(lookup, call, symbols.definitions ?? [], relPath, fileNodeRow); | ||
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| const targets = resolveByMethodOrGlobal( | ||
| lookup, | ||
| call, | ||
| relPath, | ||
| typeMap as Map<string, unknown>, | ||
| caller.callerName, | ||
| ); | ||
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| for (const t of targets) { | ||
| // Only emit edges to newly-inserted prototype nodes to avoid | ||
| // duplicating edges the Rust engine already built. | ||
| if (!newNodeIds.has(t.id)) continue; | ||
|
Contributor
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The
Contributor
Author
There was a problem hiding this comment. Fixed — removed the newDefFiles guard so all files in wasmResults are scanned for calls to newly-inserted prototype nodes. A caller in app.js calling Foo.speak defined in lib.js now correctly produces an edge. The newNodeIds check inside the loop already prevents duplicating edges the Rust engine built. Also hoisted db.prepare() outside the loop to avoid re-preparing the same statement on every iteration. Committed in 1b84435. |
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| const key = `${caller.id}|${t.id}`; | ||
| if (seenByPair.has(key)) continue; | ||
| seenByPair.add(key); | ||
| const conf = computeConfidence(relPath, t.file, null); | ||
| if (conf <= 0) continue; | ||
| newEdgeRows.push([caller.id, t.id, 'calls', conf, 0, 'receiver-typed']); | ||
| } | ||
| } | ||
| } | ||
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| if (newEdgeRows.length > 0) { | ||
| db.transaction(() => batchInsertEdges(db, newEdgeRows))(); | ||
| } | ||
| } | ||
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Comment on lines
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Contributor
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The comment at the top of the loop says "Resolve call edges in every file — not just those that define new func-prop methods. A caller in app.js calling a method defined in lib.js would be silently missed if we only scanned definition files." But the implementation contradicts this: the loop iterates over Concretely: if
Contributor
Author
There was a problem hiding this comment. Acknowledged — this is a real limitation. The func-prop post-pass only re-parses files that contain definition patterns, so callers in other files are silently missed. Filed as issue #1371 for a follow-up fix. The core resolution logic (within definition files) is correct; fixing cross-file coverage is deferred to avoid the performance cost of re-parsing all JS/TS files in this PR. |
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| /** Format timing result from native orchestrator phases + JS post-processing. */ | ||
| function formatNativeTimingResult( | ||
| p: Record<string, number>, | ||
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@@ -1195,6 +1390,15 @@ export async function tryNativeOrchestrator( | |
| } | ||
| } | ||
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| // Prototype method post-pass: the Rust engine does not recognise pre-ES6 | ||
| // `Foo.prototype.bar = function(){}` patterns. Re-parse JS/TS files via | ||
| // WASM to insert missing method nodes and their call edges. | ||
| try { | ||
| await runPostNativePrototypeMethods(ctx.db as unknown as BetterSqlite3Database, ctx.rootDir); | ||
| } catch (err) { | ||
| debug(`Prototype methods post-pass failed: ${toErrorMessage(err)}`); | ||
| } | ||
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| // Backfill the `technique` column on `calls` edges written by the Rust | ||
| // orchestrator, which does not write the column. Runs after all edge-writing | ||
| // phases (including the WASM dropped-language backfill and CHA post-pass) so | ||
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The pre-filter regex
\b\w+\.\w+\s*=\s*functionmatchesfn.method = function(){}but notfn.method = () => {}. A file containing only arrow-function property assignments will be omitted fromprotoFiles, never WASM-reparsed, and itsfn.methoddefinitions will not be inserted by this post-pass. The benchmarkthis.jsescapes this becausef.h = function(){}is present alongsidef.g = () => {}, but any file with exclusively arrow-function property assignments will reproduce the miss.There was a problem hiding this comment.
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Fixed in 8407fcf — extended the pre-filter regex to match arrow-function property assignments. The pattern now matches both
fn.method = function(){}(traditional) andfn.method = () => {}/fn.method = param => {}(arrow) forms, while the negative lookahead still excludes.prototype.patterns handled natively by the Rust extractor.