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Diffstat (limited to 'lib/DebugInfo/DWARFDebugArangeSet.cpp')
-rw-r--r-- | lib/DebugInfo/DWARFDebugArangeSet.cpp | 104 |
1 files changed, 0 insertions, 104 deletions
diff --git a/lib/DebugInfo/DWARFDebugArangeSet.cpp b/lib/DebugInfo/DWARFDebugArangeSet.cpp deleted file mode 100644 index d4bff90f656d7..0000000000000 --- a/lib/DebugInfo/DWARFDebugArangeSet.cpp +++ /dev/null @@ -1,104 +0,0 @@ -//===-- DWARFDebugArangeSet.cpp -------------------------------------------===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// - -#include "llvm/DebugInfo/DWARFDebugArangeSet.h" -#include "llvm/Support/Format.h" -#include "llvm/Support/raw_ostream.h" -#include <algorithm> -#include <cassert> -using namespace llvm; - -void DWARFDebugArangeSet::clear() { - Offset = -1U; - std::memset(&HeaderData, 0, sizeof(Header)); - ArangeDescriptors.clear(); -} - -bool -DWARFDebugArangeSet::extract(DataExtractor data, uint32_t *offset_ptr) { - if (data.isValidOffset(*offset_ptr)) { - ArangeDescriptors.clear(); - Offset = *offset_ptr; - - // 7.20 Address Range Table - // - // Each set of entries in the table of address ranges contained in - // the .debug_aranges section begins with a header consisting of: a - // 4-byte length containing the length of the set of entries for this - // compilation unit, not including the length field itself; a 2-byte - // version identifier containing the value 2 for DWARF Version 2; a - // 4-byte offset into the.debug_infosection; a 1-byte unsigned integer - // containing the size in bytes of an address (or the offset portion of - // an address for segmented addressing) on the target system; and a - // 1-byte unsigned integer containing the size in bytes of a segment - // descriptor on the target system. This header is followed by a series - // of tuples. Each tuple consists of an address and a length, each in - // the size appropriate for an address on the target architecture. - HeaderData.Length = data.getU32(offset_ptr); - HeaderData.Version = data.getU16(offset_ptr); - HeaderData.CuOffset = data.getU32(offset_ptr); - HeaderData.AddrSize = data.getU8(offset_ptr); - HeaderData.SegSize = data.getU8(offset_ptr); - - // Perform basic validation of the header fields. - if (!data.isValidOffsetForDataOfSize(Offset, HeaderData.Length) || - (HeaderData.AddrSize != 4 && HeaderData.AddrSize != 8)) { - clear(); - return false; - } - - // The first tuple following the header in each set begins at an offset - // that is a multiple of the size of a single tuple (that is, twice the - // size of an address). The header is padded, if necessary, to the - // appropriate boundary. - const uint32_t header_size = *offset_ptr - Offset; - const uint32_t tuple_size = HeaderData.AddrSize * 2; - uint32_t first_tuple_offset = 0; - while (first_tuple_offset < header_size) - first_tuple_offset += tuple_size; - - *offset_ptr = Offset + first_tuple_offset; - - Descriptor arangeDescriptor; - - static_assert(sizeof(arangeDescriptor.Address) == - sizeof(arangeDescriptor.Length), - "Different datatypes for addresses and sizes!"); - assert(sizeof(arangeDescriptor.Address) >= HeaderData.AddrSize); - - while (data.isValidOffset(*offset_ptr)) { - arangeDescriptor.Address = data.getUnsigned(offset_ptr, HeaderData.AddrSize); - arangeDescriptor.Length = data.getUnsigned(offset_ptr, HeaderData.AddrSize); - - // Each set of tuples is terminated by a 0 for the address and 0 - // for the length. - if (arangeDescriptor.Address || arangeDescriptor.Length) - ArangeDescriptors.push_back(arangeDescriptor); - else - break; // We are done if we get a zero address and length - } - - return !ArangeDescriptors.empty(); - } - return false; -} - -void DWARFDebugArangeSet::dump(raw_ostream &OS) const { - OS << format("Address Range Header: length = 0x%8.8x, version = 0x%4.4x, ", - HeaderData.Length, HeaderData.Version) - << format("cu_offset = 0x%8.8x, addr_size = 0x%2.2x, seg_size = 0x%2.2x\n", - HeaderData.CuOffset, HeaderData.AddrSize, HeaderData.SegSize); - - const uint32_t hex_width = HeaderData.AddrSize * 2; - for (const auto &Desc : ArangeDescriptors) { - OS << format("[0x%*.*" PRIx64 " -", hex_width, hex_width, Desc.Address) - << format(" 0x%*.*" PRIx64 ")\n", - hex_width, hex_width, Desc.getEndAddress()); - } -} |