Revert "Extract construction of DataBufferLLVM into FileSystem"

It broke the lldb sanitizer bots.

llvm-svn: 346694

1 files changed, 28 insertions, 0 deletions

diff --git a/lldb/source/Utility/DataBufferLLVM.cpp b/lldb/source/Utility/DataBufferLLVM.cpp
index 0ab3fe5afd4..84870129094 100644
--- a/lldb/source/Utility/DataBufferLLVM.cpp
+++ b/lldb/source/Utility/DataBufferLLVM.cpp
@@ -27,6 +27,34 @@ DataBufferLLVM::DataBufferLLVM(
 
 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());
 }