[all-commits] [llvm/llvm-project] c5978f: UBSAN: emit distinctive traps

[Tim Northover via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: c5978f42ec8e9f7fa62a38510343440485752ec5
      https://github.com/llvm/llvm-project/commit/c5978f42ec8e9f7fa62a38510343440485752ec5
  Author: Tim Northover <t.p.northover at gmail.com>
  Date:   2020-12-08 (Tue, 08 Dec 2020)

  Changed paths:
    M clang/lib/CodeGen/CGClass.cpp
    M clang/lib/CodeGen/CGExpr.cpp
    M clang/lib/CodeGen/CGExprScalar.cpp
    M clang/lib/CodeGen/CodeGenFunction.h
    M clang/lib/CodeGen/ItaniumCXXABI.cpp
    M clang/test/CodeGen/bounds-checking.c
    M clang/test/CodeGen/catch-alignment-assumption-attribute-align_value-on-lvalue.cpp
    M clang/test/CodeGen/catch-alignment-assumption-attribute-align_value-on-paramvar.cpp
    M clang/test/CodeGen/catch-alignment-assumption-attribute-alloc_align-on-function-variable.cpp
    M clang/test/CodeGen/catch-alignment-assumption-attribute-alloc_align-on-function.cpp
    M clang/test/CodeGen/catch-alignment-assumption-attribute-assume_aligned-on-function-two-params.cpp
    M clang/test/CodeGen/catch-alignment-assumption-attribute-assume_aligned-on-function.cpp
    M clang/test/CodeGen/catch-alignment-assumption-builtin_assume_aligned-three-params-variable.cpp
    M clang/test/CodeGen/catch-alignment-assumption-builtin_assume_aligned-three-params.cpp
    M clang/test/CodeGen/catch-alignment-assumption-builtin_assume_aligned-two-params.cpp
    M clang/test/CodeGen/catch-alignment-assumption-openmp.cpp
    M clang/test/CodeGen/catch-implicit-integer-sign-changes-CompoundAssignOperator.c
    M clang/test/CodeGen/catch-implicit-integer-sign-changes-incdec.c
    M clang/test/CodeGen/catch-implicit-integer-sign-changes.c
    M clang/test/CodeGen/catch-implicit-integer-truncations-CompoundAssignOperator.c
    M clang/test/CodeGen/catch-implicit-integer-truncations.c
    M clang/test/CodeGen/catch-implicit-signed-integer-truncation-or-sign-change-CompoundAssignOperator.c
    M clang/test/CodeGen/catch-implicit-signed-integer-truncation-or-sign-change.c
    M clang/test/CodeGen/catch-implicit-signed-integer-truncations-incdec.c
    M clang/test/CodeGen/catch-nullptr-and-nonzero-offset-when-nullptr-is-defined.c
    M clang/test/CodeGen/catch-nullptr-and-nonzero-offset.c
    M clang/test/CodeGen/catch-pointer-overflow-volatile.c
    M clang/test/CodeGen/catch-pointer-overflow.c
    M clang/test/CodeGen/catch-undef-behavior.c
    M clang/test/CodeGen/cfi-check-fail.c
    M clang/test/CodeGen/cfi-check-fail2.c
    M clang/test/CodeGen/sanitize-trap.c
    M clang/test/CodeGen/trapv.c
    A clang/test/CodeGen/ubsan-trap-debugloc.c
    M clang/test/CodeGen/unsigned-trapv.c
    M clang/test/CodeGenCXX/cfi-cast.cpp
    M clang/test/CodeGenCXX/cfi-mfcall.cpp
    M clang/test/CodeGenCXX/trap-fnattr.cpp
    M clang/test/CodeGenCXX/type-metadata.cpp
    M llvm/docs/LangRef.rst
    M llvm/include/llvm/CodeGen/ISDOpcodes.h
    M llvm/include/llvm/IR/Intrinsics.td
    M llvm/include/llvm/Target/TargetSelectionDAG.td
    M llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAGDumper.cpp
    M llvm/lib/CodeGen/TargetLoweringBase.cpp
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/lib/Target/AArch64/AArch64InstrInfo.td
    M llvm/lib/Target/AArch64/GISel/AArch64InstructionSelector.cpp
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/lib/Target/X86/X86InstrSystem.td
    M llvm/lib/Target/X86/X86MCInstLower.cpp
    A llvm/test/CodeGen/AArch64/ubsantrap.ll
    A llvm/test/CodeGen/X86/ubsantrap.ll

  Log Message:
  -----------
  UBSAN: emit distinctive traps

Sometimes people get minimal crash reports after a UBSAN incident. This change
tags each trap with an integer representing the kind of failure encountered,
which can aid in tracking down the root cause of the problem.