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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
Download Patch File Download Diff File Expand all files Collapse all files

18
tools/llvm-symbolizer/LLVMSymbolize.cpp
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@@ -300,12 +300,12 @@ LLVMSymbolizer::getOrCreateBinary(const std::string &Path) {
return I->second;
Binary *Bin = nullptr;
Binary *DbgBin = nullptr;
ErrorOr<std::unique_ptr<Binary>> BinaryOrErr = createBinary(Path);
ErrorOr<OwningBinary<Binary>> BinaryOrErr = createBinary(Path);
if (!error(BinaryOrErr.getError())) {
std::unique_ptr<Binary> &ParsedBinary = BinaryOrErr.get();
OwningBinary<Binary> &ParsedBinary = BinaryOrErr.get();
// Check if it's a universal binary.
Bin = ParsedBinary.get();
ParsedBinariesAndObjects.push_back(std::move(ParsedBinary));
Bin = ParsedBinary.getBinary().get();
addOwningBinary(std::move(ParsedBinary));
if (Bin->isMachO() || Bin->isMachOUniversalBinary()) {
// On Darwin we may find DWARF in separate object file in
// resource directory.
@@ -314,8 +314,9 @@ LLVMSymbolizer::getOrCreateBinary(const std::string &Path) {
BinaryOrErr = createBinary(ResourcePath);
std::error_code EC = BinaryOrErr.getError();
if (EC != errc::no_such_file_or_directory && !error(EC)) {
DbgBin = BinaryOrErr.get().get();
ParsedBinariesAndObjects.push_back(std::move(BinaryOrErr.get()));
OwningBinary<Binary> B = std::move(BinaryOrErr.get());
DbgBin = B.getBinary().get();
addOwningBinary(std::move(B));
}
}
// Try to locate the debug binary using .gnu_debuglink section.
@@ -327,8 +328,9 @@ LLVMSymbolizer::getOrCreateBinary(const std::string &Path) {
findDebugBinary(Path, DebuglinkName, CRCHash, DebugBinaryPath)) {
BinaryOrErr = createBinary(DebugBinaryPath);
if (!error(BinaryOrErr.getError())) {
DbgBin = BinaryOrErr.get().get();
ParsedBinariesAndObjects.push_back(std::move(BinaryOrErr.get()));
OwningBinary<Binary> B = std::move(BinaryOrErr.get());
DbgBin = B.getBinary().get();
addOwningBinary(std::move(B));
}
}
}