Alexey Samsonov | bb1071c | 2012-11-06 15:09:03 +0000 | [diff] [blame^] | 1 | //===--- SanitizerArgs.h - Arguments for sanitizer tools -------*- C++ -*-===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | #ifndef CLANG_LIB_DRIVER_SANITIZERARGS_H_ |
| 10 | #define CLANG_LIB_DRIVER_SANITIZERARGS_H_ |
| 11 | |
| 12 | #include "clang/Driver/ArgList.h" |
| 13 | |
| 14 | namespace clang { |
| 15 | namespace driver { |
| 16 | |
| 17 | class SanitizerArgs { |
| 18 | /// Assign ordinals to sanitizer flags. We'll use the ordinal values as |
| 19 | /// bit positions within \c Kind. |
| 20 | enum SanitizeOrdinal { |
| 21 | #define SANITIZER(NAME, ID) SO_##ID, |
| 22 | #include "clang/Basic/Sanitizers.def" |
| 23 | SO_Count |
| 24 | }; |
| 25 | |
| 26 | /// Bugs to catch at runtime. |
| 27 | enum SanitizeKind { |
| 28 | #define SANITIZER(NAME, ID) ID = 1 << SO_##ID, |
| 29 | #define SANITIZER_GROUP(NAME, ID, ALIAS) ID = ALIAS, |
| 30 | #include "clang/Basic/Sanitizers.def" |
| 31 | NeedsAsanRt = Address, |
| 32 | NeedsTsanRt = Thread, |
| 33 | NeedsUbsanRt = Undefined |
| 34 | }; |
| 35 | unsigned Kind; |
| 36 | |
| 37 | public: |
| 38 | SanitizerArgs() : Kind(0) {} |
| 39 | /// Parses the sanitizer arguments from an argument list. |
| 40 | SanitizerArgs(const Driver &D, const ArgList &Args); |
| 41 | |
| 42 | bool needsAsanRt() const { return Kind & NeedsAsanRt; } |
| 43 | bool needsTsanRt() const { return Kind & NeedsTsanRt; } |
| 44 | bool needsUbsanRt() const { return Kind & NeedsUbsanRt; } |
| 45 | |
| 46 | bool sanitizesVptr() const { return Kind & Vptr; } |
| 47 | |
| 48 | void addArgs(const ArgList &Args, ArgStringList &CmdArgs) const { |
| 49 | if (!Kind) |
| 50 | return; |
| 51 | llvm::SmallString<256> SanitizeOpt("-fsanitize="); |
| 52 | #define SANITIZER(NAME, ID) \ |
| 53 | if (Kind & ID) \ |
| 54 | SanitizeOpt += NAME ","; |
| 55 | #include "clang/Basic/Sanitizers.def" |
| 56 | SanitizeOpt.pop_back(); |
| 57 | CmdArgs.push_back(Args.MakeArgString(SanitizeOpt)); |
| 58 | } |
| 59 | |
| 60 | private: |
| 61 | /// Parse a single value from a -fsanitize= or -fno-sanitize= value list. |
| 62 | /// Returns a member of the \c SanitizeKind enumeration, or \c 0 if \p Value |
| 63 | /// is not known. |
| 64 | static unsigned parse(const char *Value) { |
| 65 | return llvm::StringSwitch<SanitizeKind>(Value) |
| 66 | #define SANITIZER(NAME, ID) .Case(NAME, ID) |
| 67 | #define SANITIZER_GROUP(NAME, ID, ALIAS) .Case(NAME, ID) |
| 68 | #include "clang/Basic/Sanitizers.def" |
| 69 | .Default(SanitizeKind()); |
| 70 | } |
| 71 | |
| 72 | /// Parse a -fsanitize= or -fno-sanitize= argument's values, diagnosing any |
| 73 | /// invalid components. |
| 74 | static unsigned parse(const Driver &D, const Arg *A) { |
| 75 | unsigned Kind = 0; |
| 76 | for (unsigned I = 0, N = A->getNumValues(); I != N; ++I) { |
| 77 | if (unsigned K = parse(A->getValue(I))) |
| 78 | Kind |= K; |
| 79 | else |
| 80 | D.Diag(diag::err_drv_unsupported_option_argument) |
| 81 | << A->getOption().getName() << A->getValue(I); |
| 82 | } |
| 83 | return Kind; |
| 84 | } |
| 85 | |
| 86 | /// Produce an argument string from argument \p A, which shows how it provides |
| 87 | /// a value in \p Mask. For instance, the argument |
| 88 | /// "-fsanitize=address,alignment" with mask \c NeedsUbsanRt would produce |
| 89 | /// "-fsanitize=alignment". |
| 90 | static std::string describeSanitizeArg(const ArgList &Args, const Arg *A, |
| 91 | unsigned Mask) { |
| 92 | if (!A->getOption().matches(options::OPT_fsanitize_EQ)) |
| 93 | return A->getAsString(Args); |
| 94 | |
| 95 | for (unsigned I = 0, N = A->getNumValues(); I != N; ++I) |
| 96 | if (parse(A->getValue(I)) & Mask) |
| 97 | return std::string("-fsanitize=") + A->getValue(I); |
| 98 | |
| 99 | llvm_unreachable("arg didn't provide expected value"); |
| 100 | } |
| 101 | }; |
| 102 | |
| 103 | } // namespace driver |
| 104 | } // namespace clang |
| 105 | |
| 106 | #endif // CLANG_LIB_DRIVER_SANITIZERARGS_H_ |