llvm-6502/lib/DebugInfo/DWARFDebugRangeList.h
Benjamin Kramer 00e08fcaa0 Canonicalize header guards into a common format.
Add header guards to files that were missing guards. Remove #endif comments
as they don't seem common in LLVM (we can easily add them back if we decide
they're useful)

Changes made by clang-tidy with minor tweaks.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215558 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-13 16:26:38 +00:00

78 lines
2.8 KiB
C++

//===-- DWARFDebugRangeList.h -----------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_DEBUGINFO_DWARFDEBUGRANGELIST_H
#define LLVM_LIB_DEBUGINFO_DWARFDEBUGRANGELIST_H
#include "llvm/Support/DataExtractor.h"
#include <vector>
namespace llvm {
class raw_ostream;
/// DWARFAddressRangesVector - represents a set of absolute address ranges.
typedef std::vector<std::pair<uint64_t, uint64_t>> DWARFAddressRangesVector;
class DWARFDebugRangeList {
public:
struct RangeListEntry {
// A beginning address offset. This address offset has the size of an
// address and is relative to the applicable base address of the
// compilation unit referencing this range list. It marks the beginning
// of an address range.
uint64_t StartAddress;
// An ending address offset. This address offset again has the size of
// an address and is relative to the applicable base address of the
// compilation unit referencing this range list. It marks the first
// address past the end of the address range. The ending address must
// be greater than or equal to the beginning address.
uint64_t EndAddress;
// The end of any given range list is marked by an end of list entry,
// which consists of a 0 for the beginning address offset
// and a 0 for the ending address offset.
bool isEndOfListEntry() const {
return (StartAddress == 0) && (EndAddress == 0);
}
// A base address selection entry consists of:
// 1. The value of the largest representable address offset
// (for example, 0xffffffff when the size of an address is 32 bits).
// 2. An address, which defines the appropriate base address for
// use in interpreting the beginning and ending address offsets of
// subsequent entries of the location list.
bool isBaseAddressSelectionEntry(uint8_t AddressSize) const {
assert(AddressSize == 4 || AddressSize == 8);
if (AddressSize == 4)
return StartAddress == -1U;
else
return StartAddress == -1ULL;
}
};
private:
// Offset in .debug_ranges section.
uint32_t Offset;
uint8_t AddressSize;
std::vector<RangeListEntry> Entries;
public:
DWARFDebugRangeList() { clear(); }
void clear();
void dump(raw_ostream &OS) const;
bool extract(DataExtractor data, uint32_t *offset_ptr);
/// getAbsoluteRanges - Returns absolute address ranges defined by this range
/// list. Has to be passed base address of the compile unit referencing this
/// range list.
DWARFAddressRangesVector getAbsoluteRanges(uint64_t BaseAddress) const;
};
} // namespace llvm
#endif // LLVM_DEBUGINFO_DWARFDEBUGRANGELIST_H