1 //===-- COFFDirectiveParser.cpp - JITLink coff directive parser --*- C++ -*===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // MSVC COFF directive parser 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "COFFDirectiveParser.h" 14 15 #include <array> 16 17 using namespace llvm; 18 using namespace jitlink; 19 20 #define DEBUG_TYPE "jitlink" 21 22 // Create prefix string literals used in Options.td 23 #define PREFIX(NAME, VALUE) \ 24 static constexpr StringLiteral NAME##_init[] = VALUE; \ 25 static constexpr ArrayRef<StringLiteral> NAME(NAME##_init, \ 26 std::size(NAME##_init) - 1); 27 #include "COFFOptions.inc" 28 #undef PREFIX 29 30 // Create table mapping all options defined in COFFOptions.td 31 static constexpr opt::OptTable::Info infoTable[] = { 32 #define OPTION(X1, X2, ID, KIND, GROUP, ALIAS, X7, X8, X9, X10, X11, X12) \ 33 {X1, \ 34 X2, \ 35 X10, \ 36 X11, \ 37 COFF_OPT_##ID, \ 38 opt::Option::KIND##Class, \ 39 X9, \ 40 X8, \ 41 COFF_OPT_##GROUP, \ 42 COFF_OPT_##ALIAS, \ 43 X7, \ 44 X12}, 45 #include "COFFOptions.inc" 46 #undef OPTION 47 }; 48 49 class COFFOptTable : public opt::OptTable { 50 public: 51 COFFOptTable() : OptTable(infoTable, true) {} 52 }; 53 54 static COFFOptTable optTable; 55 56 Expected<opt::InputArgList> COFFDirectiveParser::parse(StringRef Str) { 57 SmallVector<StringRef, 16> Tokens; 58 SmallVector<const char *, 16> Buffer; 59 cl::TokenizeWindowsCommandLineNoCopy(Str, saver, Tokens); 60 for (StringRef Tok : Tokens) { 61 bool HasNul = Tok.end() != Str.end() && Tok.data()[Tok.size()] == '\0'; 62 Buffer.push_back(HasNul ? Tok.data() : saver.save(Tok).data()); 63 } 64 65 unsigned missingIndex; 66 unsigned missingCount; 67 68 auto Result = optTable.ParseArgs(Buffer, missingIndex, missingCount); 69 70 if (missingCount) 71 return make_error<JITLinkError>(Twine("COFF directive parsing failed: ") + 72 Result.getArgString(missingIndex) + 73 " missing argument"); 74 LLVM_DEBUG({ 75 for (auto *arg : Result.filtered(COFF_OPT_UNKNOWN)) 76 dbgs() << "Unknown coff option argument: " << arg->getAsString(Result) 77 << "\n"; 78 }); 79 return std::move(Result); 80 } 81