Author: Timm Baeder Date: 2025-04-27T20:02:58+02:00 New Revision: e045d55dd51bfa6ee4ef29d518393cb57b4dc0c4
URL: https://github.com/llvm/llvm-project/commit/e045d55dd51bfa6ee4ef29d518393cb57b4dc0c4 DIFF: https://github.com/llvm/llvm-project/commit/e045d55dd51bfa6ee4ef29d518393cb57b4dc0c4.diff LOG: [clang][bytecode] Check for global decls in destructors (#137525) Destructors can't be called on global variables. Added: Modified: clang/lib/AST/ByteCode/Interp.cpp clang/lib/AST/ByteCode/Interp.h clang/test/AST/ByteCode/records.cpp Removed: ################################################################################ diff --git a/clang/lib/AST/ByteCode/Interp.cpp b/clang/lib/AST/ByteCode/Interp.cpp index 37111343178dd..080f694e27da2 100644 --- a/clang/lib/AST/ByteCode/Interp.cpp +++ b/clang/lib/AST/ByteCode/Interp.cpp @@ -1387,9 +1387,14 @@ static bool checkConstructor(InterpState &S, CodePtr OpPC, const Function *Func, return false; } -static bool checkDestructor(InterpState &S, CodePtr OpPC, const Function *Func, - const Pointer &ThisPtr) { - return CheckActive(S, OpPC, ThisPtr, AK_Destroy); +bool CheckDestructor(InterpState &S, CodePtr OpPC, const Pointer &Ptr) { + // Can't call a dtor on a global variable. + if (Ptr.block()->isStatic()) { + const SourceInfo &E = S.Current->getSource(OpPC); + S.FFDiag(E, diag::note_constexpr_modify_global); + return false; + } + return CheckActive(S, OpPC, Ptr, AK_Destroy); } static void compileFunction(InterpState &S, const Function *Func) { @@ -1486,7 +1491,7 @@ bool Call(InterpState &S, CodePtr OpPC, const Function *Func, if (Func->isConstructor() && !checkConstructor(S, OpPC, Func, ThisPtr)) return false; - if (Func->isDestructor() && !checkDestructor(S, OpPC, Func, ThisPtr)) + if (Func->isDestructor() && !CheckDestructor(S, OpPC, ThisPtr)) return false; } diff --git a/clang/lib/AST/ByteCode/Interp.h b/clang/lib/AST/ByteCode/Interp.h index 63a1f3e8033b7..27e73bb72fecb 100644 --- a/clang/lib/AST/ByteCode/Interp.h +++ b/clang/lib/AST/ByteCode/Interp.h @@ -162,6 +162,7 @@ bool InvalidShuffleVectorIndex(InterpState &S, CodePtr OpPC, uint32_t Index); bool CheckBitCast(InterpState &S, CodePtr OpPC, bool HasIndeterminateBits, bool TargetIsUCharOrByte); bool CheckBCPResult(InterpState &S, const Pointer &Ptr); +bool CheckDestructor(InterpState &S, CodePtr OpPC, const Pointer &Ptr); template <typename T> static bool handleOverflow(InterpState &S, CodePtr OpPC, const T &SrcValue) { @@ -3242,7 +3243,7 @@ bool DiagTypeid(InterpState &S, CodePtr OpPC); inline bool CheckDestruction(InterpState &S, CodePtr OpPC) { const auto &Ptr = S.Stk.peek<Pointer>(); - return CheckActive(S, OpPC, Ptr, AK_Destroy); + return CheckDestructor(S, OpPC, Ptr); } //===----------------------------------------------------------------------===// diff --git a/clang/test/AST/ByteCode/records.cpp b/clang/test/AST/ByteCode/records.cpp index b4059f009b887..9abfe6b8a15e7 100644 --- a/clang/test/AST/ByteCode/records.cpp +++ b/clang/test/AST/ByteCode/records.cpp @@ -1810,3 +1810,12 @@ namespace AccessMismatch { static_assert(B().cmp(), ""); // both-error {{constant expression}} \ // both-note {{in call}} } + +namespace GlobalDtor { + struct A { + }; + constexpr A a = {}; + constexpr void destroy1() { // both-error {{constexpr}} + a.~A(); // both-note {{cannot modify an object that is visible outside}} + } +} _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
