[llvm-branch-commits] [llvm] [BOLT] Gadget scanner: detect signing oracles (PR #134146)

[Kristof Beyls via llvm-branch-commits]

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@@ -462,7 +563,22 @@ class DataflowSrcSafetyAnalysis
     return DFParent::getStateBefore(Inst);
   }
 
-  void run() override { DFParent::run(); }
+  void run() override {
+    for (BinaryBasicBlock &BB : Func) {
+      if (auto CheckerInfo = BC.MIB->getAuthCheckedReg(BB)) {
+        MCInst *LastInstOfChecker = BB.getLastNonPseudoInstr();
+        LLVM_DEBUG({
+          dbgs() << "Found pointer checking sequence in " << BB.getName()
+                 << ":\n";
+          traceReg(BC, "Checked register", CheckerInfo->first);
+          traceInst(BC, "First instruction", *CheckerInfo->second);
+          traceInst(BC, "Last instruction", *LastInstOfChecker);
+        });
+        CheckerSequenceInfo[LastInstOfChecker] = *CheckerInfo;
+      }
+    }
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kbeyls wrote:

Fair enough, let's leave it as it is.

https://github.com/llvm/llvm-project/pull/134146