[Lldb-commits] [lldb] [lldb] Add VirtualDataExtractor for virtual address translation (PR #168802)

[David Spickett via lldb-commits]

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+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLDB_UTILITY_VIRTUALDATAEXTRACTOR_H
+#define LLDB_UTILITY_VIRTUALDATAEXTRACTOR_H
+
+#include "lldb/Utility/DataExtractor.h"
+#include "lldb/Utility/RangeMap.h"
+#include "lldb/lldb-types.h"
+
+namespace lldb_private {
+
+/// A DataExtractor subclass that allows reading data at virtual addresses
+/// using a lookup table that maps virtual address ranges to physical offsets.
+///
+/// This class maintains a lookup table where each entry contains:
+/// - base: starting virtual address for this entry
+/// - size: size of this entry in bytes
+/// - data: physical offset in the underlying data buffer
+///
+/// Reads are translated from virtual addresses to physical offsets using
+/// this lookup table. Reads cannot cross entry boundaries and this is
+/// enforced with assertions.
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DavidSpickett wrote:

I presume you would do partial reads of some form but neither DataExtractor or the users of this class would be setup to handle that.

https://github.com/llvm/llvm-project/pull/168802