diff options
Diffstat (limited to 'lldb/source/Utility/DataBufferLLVM.cpp')
-rw-r--r-- | lldb/source/Utility/DataBufferLLVM.cpp | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/lldb/source/Utility/DataBufferLLVM.cpp b/lldb/source/Utility/DataBufferLLVM.cpp new file mode 100644 index 00000000000..2f6654d4c9a --- /dev/null +++ b/lldb/source/Utility/DataBufferLLVM.cpp @@ -0,0 +1,52 @@ +//===--- 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" + +using namespace lldb_private; + +DataBufferLLVM::DataBufferLLVM(std::unique_ptr<llvm::MemoryBuffer> MemBuffer) + : Buffer(std::move(MemBuffer)) { + assert(Buffer != nullptr && + "Cannot construct a DataBufferLLVM with a null buffer"); +} + +DataBufferLLVM::~DataBufferLLVM() {} + +std::shared_ptr<DataBufferLLVM> +DataBufferLLVM::CreateFromPath(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 Volatile = !llvm::sys::fs::is_local(Path); + + auto Buffer = llvm::MemoryBuffer::getFileSlice(Path, Size, Offset, Volatile); + if (!Buffer) + return nullptr; + return std::shared_ptr<DataBufferLLVM>( + new DataBufferLLVM(std::move(*Buffer))); +} + +uint8_t *DataBufferLLVM::GetBytes() { + return const_cast<uint8_t *>(GetBuffer()); +} + +const uint8_t *DataBufferLLVM::GetBytes() const { return GetBuffer(); } + +lldb::offset_t DataBufferLLVM::GetByteSize() const { + return Buffer->getBufferSize(); +} + +const uint8_t *DataBufferLLVM::GetBuffer() const { + return reinterpret_cast<const uint8_t *>(Buffer->getBufferStart()); +} |