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//===--- DataBufferLLVM.cpp -------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lldb/Utility/DataBufferLLVM.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/MemoryBuffer.h"
#include <assert.h> // for assert
#include <type_traits> // for move
using namespace lldb_private;
DataBufferLLVM::DataBufferLLVM(
std::unique_ptr<llvm::WritableMemoryBuffer> MemBuffer)
: Buffer(std::move(MemBuffer)) {
assert(Buffer != nullptr &&
"Cannot construct a DataBufferLLVM with a null buffer");
}
DataBufferLLVM::~DataBufferLLVM() {}
std::shared_ptr<DataBufferLLVM>
DataBufferLLVM::CreateSliceFromPath(const llvm::Twine &Path, uint64_t Size,
uint64_t Offset) {
// If the file resides non-locally, pass the volatile flag so that we don't
// mmap it.
bool IsVolatile = !llvm::sys::fs::is_local(Path);
auto Buffer =
llvm::WritableMemoryBuffer::getFileSlice(Path, Size, Offset, IsVolatile);
if (!Buffer)
return nullptr;
return std::shared_ptr<DataBufferLLVM>(
new DataBufferLLVM(std::move(*Buffer)));
}
std::shared_ptr<DataBufferLLVM>
DataBufferLLVM::CreateFromPath(const llvm::Twine &Path) {
// If the file resides non-locally, pass the volatile flag so that we don't
// mmap it.
bool IsVolatile = !llvm::sys::fs::is_local(Path);
auto Buffer = llvm::WritableMemoryBuffer::getFile(Path, -1, IsVolatile);
if (!Buffer)
return nullptr;
return std::shared_ptr<DataBufferLLVM>(
new DataBufferLLVM(std::move(*Buffer)));
}
uint8_t *DataBufferLLVM::GetBytes() {
return reinterpret_cast<uint8_t *>(Buffer->getBufferStart());
}
const uint8_t *DataBufferLLVM::GetBytes() const {
return reinterpret_cast<const uint8_t *>(Buffer->getBufferStart());
}
lldb::offset_t DataBufferLLVM::GetByteSize() const {
return Buffer->getBufferSize();
}
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