vasilito
cb424d7448
verify-patch-sanity.py validates every active recipe .patch has internally- consistent hunk line counts — catching the 'malformed patch at line N' failure at commit/CI/preflight time instead of hours into a cook. This cycle hit that class three times (qtwaylandscanner, sddm, xwayland), each only discovered when cookbook tried to apply the patch. Running it across the repo found 29 latent malformed patches (validated against GNU patch: e.g. relibc/P3-sysv-ipc reproduces 'malformed patch at line 22'). They were harmless only because they sit in vendored recipes (baked, not re- applied) — but would fail on any version-bump re-derivation. --fix recounts the hunk headers (body untouched) and repaired all 29. Wired into build-preflight.sh (Phase 1.0D) and redbear-ci.yml, with a unit test (test-patch-sanity.sh). Skips archived/legacy trees and unvalidatable formats (empty placeholders, bare-@@ git hunks).
76 lines
2.5 KiB
C++
76 lines
2.5 KiB
C++
//===- CFGReachabilityAnalysis.cpp - Basic reachability analysis ----------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines a flow-sensitive, (mostly) path-insensitive reachability
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// analysis based on Clang's CFGs. Clients can query if a given basic block
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// is reachable within the CFG.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Analysis/Analyses/CFGReachabilityAnalysis.h"
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#include "clang/Analysis/CFG.h"
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#include "llvm/ADT/BitVector.h"
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using namespace clang;
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CFGReverseBlockReachabilityAnalysis::CFGReverseBlockReachabilityAnalysis(
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const CFG &cfg)
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: analyzed(cfg.getNumBlockIDs(), false) {}
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bool CFGReverseBlockReachabilityAnalysis::isReachable(const CFGBlock *Src,
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const CFGBlock *Dst) {
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const unsigned DstBlockID = Dst->getBlockID();
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// If we haven't analyzed the destination node, run the analysis now
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if (!analyzed[DstBlockID]) {
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mapReachability(Dst);
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analyzed[DstBlockID] = true;
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}
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// Return the cached result
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return reachable[DstBlockID][Src->getBlockID()];
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}
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// Maps reachability to a common node by walking the predecessors of the
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// destination node.
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void CFGReverseBlockReachabilityAnalysis::mapReachability(const CFGBlock *Dst) {
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SmallVector<const CFGBlock *, 11> worklist;
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llvm::BitVector visited(analyzed.size());
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ReachableSet &DstReachability = reachable[Dst->getBlockID()];
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DstReachability.resize(analyzed.size(), false);
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// Start searching from the destination node, since we commonly will perform
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// multiple queries relating to a destination node.
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worklist.push_back(Dst);
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bool firstRun = true;
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while (!worklist.empty()) {
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const CFGBlock *block = worklist.pop_back_val();
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if (visited[block->getBlockID()])
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continue;
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visited[block->getBlockID()] = true;
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// Update reachability information for this node -> Dst
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if (!firstRun) {
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// Don't insert Dst -> Dst unless it was a predecessor of itself
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DstReachability[block->getBlockID()] = true;
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}
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else
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firstRun = false;
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// Add the predecessors to the worklist.
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for (CFGBlock::const_pred_iterator i = block->pred_begin(),
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e = block->pred_end(); i != e; ++i) {
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if (*i)
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worklist.push_back(*i);
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}
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}
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}
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