lld/wasm/Config.h

   1 //===- Config.h -------------------------------------------------*- 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 #ifndef LLD_WASM_CONFIG_H
  10 #define LLD_WASM_CONFIG_H
  11
  12 #include "llvm/ADT/StringRef.h"
  13 #include "llvm/ADT/StringSet.h"
  14 #include "llvm/BinaryFormat/Wasm.h"
  15 #include "llvm/Support/CachePruning.h"
  16
  17 namespace lld {
  18 namespace wasm {
  19
  20 // This struct contains the global configuration for the linker.
  21 // Most fields are direct mapping from the command line options
  22 // and such fields have the same name as the corresponding options.
  23 // Most fields are initialized by the driver.
  24 struct Configuration {
  25   bool allowUndefined;
  26   bool checkFeatures;
  27   bool compressRelocations;
  28   bool demangle;
  29   bool disableVerify;
  30   bool emitRelocs;
  31   bool exportAll;
  32   bool exportDynamic;
  33   bool exportTable;
  34   bool growableTable;
  35   bool gcSections;
  36   bool importMemory;
  37   bool sharedMemory;
  38   bool importTable;
  39   bool mergeDataSegments;
  40   bool pie;
  41   bool printGcSections;
  42   bool relocatable;
  43   bool saveTemps;
  44   bool shared;
  45   bool stripAll;
  46   bool stripDebug;
  47   bool stackFirst;
  48   bool trace;
  49   uint64_t globalBase;
  50   uint64_t initialMemory;
  51   uint64_t maxMemory;
  52   uint64_t zStackSize;
  53   unsigned ltoPartitions;
  54   unsigned ltoo;
  55   unsigned optimize;
  56   llvm::StringRef thinLTOJobs;
  57
  58   llvm::StringRef entry;
  59   llvm::StringRef outputFile;
  60   llvm::StringRef thinLTOCacheDir;
  61
  62   llvm::StringSet<> allowUndefinedSymbols;
  63   llvm::StringSet<> exportedSymbols;
  64   std::vector<llvm::StringRef> searchPaths;
  65   llvm::CachePruningPolicy thinLTOCachePolicy;
  66   llvm::Optional<std::vector<std::string>> features;
  67
  68   // The following config options do not directly correspond to any
  69   // particualr command line options.
  70
  71   // True if we are creating position-independent code.
  72   bool isPic;
  73
  74   // The table offset at which to place function addresses.  We reserve zero
  75   // for the null function pointer.  This gets set to 1 for executables and 0
  76   // for shared libraries (since they always added to a dynamic offset at
  77   // runtime).
  78   uint32_t tableBase = 0;
  79 };
  80
  81 // The only instance of Configuration struct.
  82 extern Configuration *config;
  83
  84 } // namespace wasm
  85 } // namespace lld
  86
  87 #endif