mirror of
https://github.com/abhigyanpatwari/GitNexus.git
synced 2026-10-11 03:38:07 +00:00
bbee2da92e
Unconditional goto-cycles (C/C++/C#/Go) wire a backward seq edge with no
structural exit-escape edge, so EXIT becomes non-reverse-reachable and
emitFileCdg silently skipped ALL control-dependence for the function.
New cfg/synthetic-escape.ts: a pure deterministic SCC routine (iterative
Tarjan, sorted adjacency) + augmentForPostDom(cfg). No-op when EXIT is
already reverse-reachable (terminating fns + visitor-escaped loops are
byte-identical — returns the same object). Otherwise it batch-bridges
every exit-less SCC by adding an ANALYSIS-ONLY escape edge from the SCC's
controlling block (highest out-degree branch; lowest-index tie-break) to
EXIT, on a shallow-cloned FunctionCfg — never mutating persisted
cfg.edges. emitFileCdg threads that augmented view through BOTH
isExitReachableFromAllBlocks AND computeControlDependence (the Ferrante
walk re-reads cfg.edges, so a tree-only augmentation would be wrong).
Precision (anti-masking): only a trapped region containing a control
point (>=2-successor block) is bridged — a branch-less trapped region
carries no recoverable control-dependence and is indistinguishable from a
genuine construction anomaly, so it stays on the skip path (the existing
disconnected-block skip test still skips, skippedUnsoundFunctions===1). A
residual non-cycle dangling block is never bridged.
repro `void handler(int a){ start: if(a>0){work();} goto start; }`:
before exitReachable=false/CDG=0 → after one synthetic 2->1 edge,
exitReachable=true, exact CDG = {2->2:T,2->2:F,2->3:T,2->4:T,2->4:F}
(pinned exactly, not CDG>0 — catches a wrong representative). AC2 property
test extended to the augmented graph; per-language goto-cycle regressions
(C/C++/C#/Go). 199 cfg tests green; bench --check fingerprints unchanged
(analysis-only, zero persisted drift).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
|
||
|---|---|---|
| .. | ||
| c-cpp-visitor.test.ts | ||
| cfg-builder.test.ts | ||
| control-dependence.test.ts | ||
| csharp-visitor.test.ts | ||
| dart-visitor.test.ts | ||
| emit-guard.test.ts | ||
| go-visitor.test.ts | ||
| harness.test.ts | ||
| harvest.test.ts | ||
| java-visitor.test.ts | ||
| kotlin-visitor.test.ts | ||
| opt-in.test.ts | ||
| php-visitor.test.ts | ||
| post-dominators.test.ts | ||
| python-visitor.test.ts | ||
| reaching-defs.test.ts | ||
| ruby-visitor.test.ts | ||
| rust-visitor.test.ts | ||
| swift-visitor.test.ts | ||
| synthetic-escape.test.ts | ||
| typescript-visitor.test.ts | ||
| vue-visitor.test.ts | ||