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f62b9cd890
This function sets the `_exportDynamic' ivar. When that's set, we export all symbols (e.g. we don't run the internalize pass). This is equivalent to the `--export-dynamic' linker flag in GNU land: --export-dynamic When creating a dynamically linked executable, add all symbols to the dynamic symbol table. The dynamic symbol table is the set of symbols which are visible from dynamic objects at run time. If you do not use this option, the dynamic symbol table will normally contain only those symbols which are referenced by some dynamic object mentioned in the link. If you use dlopen to load a dynamic object which needs to refer back to the symbols defined by the program, rather than some other dynamic object, then you will probably need to use this option when linking the program itself. The Darwin linker will support this via the `-export_dynamic' flag. We should modify clang to support this via the `-rdynamic' flag. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169656 91177308-0d34-0410-b5e6-96231b3b80d8
85 lines
2.7 KiB
C++
85 lines
2.7 KiB
C++
//===-LTOCodeGenerator.h - LLVM Link Time Optimizer -----------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares the LTOCodeGenerator class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LTO_CODE_GENERATOR_H
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#define LTO_CODE_GENERATOR_H
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#include "llvm-c/lto.h"
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#include "llvm/ADT/SmallPtrSet.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/Linker.h"
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#include <string>
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namespace llvm {
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class LLVMContext;
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class GlobalValue;
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class Mangler;
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class MemoryBuffer;
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class TargetMachine;
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class raw_ostream;
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}
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//===----------------------------------------------------------------------===//
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/// LTOCodeGenerator - C++ class which implements the opaque lto_code_gen_t
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/// type.
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///
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struct LTOCodeGenerator {
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static const char *getVersionString();
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LTOCodeGenerator();
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~LTOCodeGenerator();
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bool addModule(struct LTOModule*, std::string &errMsg);
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bool setDebugInfo(lto_debug_model, std::string &errMsg);
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bool setCodePICModel(lto_codegen_model, std::string &errMsg);
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void setCpu(const char* mCpu) { _mCpu = mCpu; }
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void setExportDynamic(bool V) { _exportDynamic = V; }
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void addMustPreserveSymbol(const char* sym) {
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_mustPreserveSymbols[sym] = 1;
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}
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bool writeMergedModules(const char *path, std::string &errMsg);
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bool compile_to_file(const char **name, std::string &errMsg);
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const void *compile(size_t *length, std::string &errMsg);
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void setCodeGenDebugOptions(const char *opts);
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private:
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bool generateObjectFile(llvm::raw_ostream &out, std::string &errMsg);
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void applyScopeRestrictions();
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void applyRestriction(llvm::GlobalValue &GV,
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std::vector<const char*> &mustPreserveList,
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llvm::SmallPtrSet<llvm::GlobalValue*, 8> &asmUsed,
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llvm::Mangler &mangler);
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bool determineTarget(std::string &errMsg);
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typedef llvm::StringMap<uint8_t> StringSet;
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llvm::LLVMContext& _context;
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llvm::Linker _linker;
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llvm::TargetMachine* _target;
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bool _emitDwarfDebugInfo;
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bool _scopeRestrictionsDone;
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bool _exportDynamic;
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lto_codegen_model _codeModel;
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StringSet _mustPreserveSymbols;
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StringSet _asmUndefinedRefs;
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llvm::MemoryBuffer* _nativeObjectFile;
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std::vector<char*> _codegenOptions;
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std::string _mCpu;
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std::string _nativeObjectPath;
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};
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#endif // LTO_CODE_GENERATOR_H
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