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Don't own the buffer in object::Binary.

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Owning the buffer is somewhat inflexible. Some Binaries have sub Binaries
(like Archive) and we had to create dummy buffers just to handle that. It is
also a bad fit for IRObjectFile where the Module wants to own the buffer too.

Keeping this ownership would make supporting IR inside native objects
particularly painful.

This patch focuses in lib/Object. If something elsewhere used to own an Binary,
now it also owns a MemoryBuffer.

This patch introduces a few new types.

* MemoryBufferRef. This is just a pair of StringRefs for the data and name.
  This is to MemoryBuffer as StringRef is to std::string.
* OwningBinary. A combination of Binary and a MemoryBuffer. This is needed
  for convenience functions that take a filename and return both the
  buffer and the Binary using that buffer.

The C api now uses OwningBinary to avoid any change in semantics. I will start
a new thread to see if we want to change it and how.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216002 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2014-08-19 18:44:46 +00:00
parent 2ac376ba34
commit 548f2b6e8f
48 changed files with 375 additions and 314 deletions
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7
include/llvm/Object/IRObjectFile.h
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@ -28,7 +28,7 @@ class IRObjectFile : public SymbolicFile {
std::vector<std::pair<std::string, uint32_t>> AsmSymbols;
public:
IRObjectFile(std::unique_ptr<MemoryBuffer> Object, std::unique_ptr<Module> M);
IRObjectFile(MemoryBufferRef Object, std::unique_ptr<Module> M);
~IRObjectFile();
void moveSymbolNext(DataRefImpl &Symb) const override;
std::error_code printSymbolName(raw_ostream &OS,
@ -49,9 +49,8 @@ public:
return v->isIR();
}
static ErrorOr<IRObjectFile *>
createIRObjectFile(std::unique_ptr<MemoryBuffer> Object,
LLVMContext &Context);
static ErrorOr<IRObjectFile *> createIRObjectFile(MemoryBufferRef Object,
LLVMContext &Context);
};
}
}