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 // For --unresolved-symbols.
  21 enum class UnresolvedPolicy { ReportError, Warn, Ignore };
  22
  23 // This struct contains the global configuration for the linker.
  24 // Most fields are direct mapping from the command line options
  25 // and such fields have the same name as the corresponding options.
  26 // Most fields are initialized by the driver.
  27 struct Configuration {
  28   bool bsymbolic;
  29   bool checkFeatures;
  30   bool compressRelocations;
  31   bool demangle;
  32   bool disableVerify;
  33   bool experimentalPic;
  34   bool emitRelocs;
  35   bool exportAll;
  36   bool exportDynamic;
  37   bool exportTable;
  38   bool growableTable;
  39   bool gcSections;
  40   bool importMemory;
  41   bool sharedMemory;
  42   bool importTable;
  43   bool importUndefined;
  44   llvm::Optional<bool> is64;
  45   bool mergeDataSegments;
  46   bool pie;
  47   bool printGcSections;
  48   bool relocatable;
  49   bool saveTemps;
  50   bool shared;
  51   bool stripAll;
  52   bool stripDebug;
  53   bool stackFirst;
  54   bool trace;
  55   uint64_t globalBase;
  56   uint64_t initialMemory;
  57   uint64_t maxMemory;
  58   uint64_t zStackSize;
  59   unsigned ltoPartitions;
  60   unsigned ltoo;
  61   unsigned optimize;
  62   llvm::StringRef thinLTOJobs;
  63   bool ltoNewPassManager;
  64   bool ltoDebugPassManager;
  65   UnresolvedPolicy unresolvedSymbols;
  66
  67   llvm::StringRef entry;
  68   llvm::StringRef mapFile;
  69   llvm::StringRef outputFile;
  70   llvm::StringRef thinLTOCacheDir;
  71
  72   llvm::StringSet<> allowUndefinedSymbols;
  73   llvm::StringSet<> exportedSymbols;
  74   std::vector<llvm::StringRef> requiredExports;
  75   std::vector<llvm::StringRef> searchPaths;
  76   llvm::CachePruningPolicy thinLTOCachePolicy;
  77   llvm::Optional<std::vector<std::string>> features;
  78
  79   // The following config options do not directly correspond to any
  80   // particualr command line options.
  81
  82   // True if we are creating position-independent code.
  83   bool isPic;
  84
  85   // True if we have an MVP input that uses __indirect_function_table and which
  86   // requires it to be allocated to table number 0.
  87   bool legacyFunctionTable = false;
  88
  89   // The table offset at which to place function addresses.  We reserve zero
  90   // for the null function pointer.  This gets set to 1 for executables and 0
  91   // for shared libraries (since they always added to a dynamic offset at
  92   // runtime).
  93   uint32_t tableBase = 0;
  94 };
  95
  96 // The only instance of Configuration struct.
  97 extern Configuration *config;
  98
  99 } // namespace wasm
 100 } // namespace lld
 101
 102 #endif