lib/DebugInfo/GSYM/Range.cpp

   1 //===- Range.cpp ------------------------------------------------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "llvm/DebugInfo/GSYM/Range.h"
  11 #include "llvm/DebugInfo/GSYM/FileWriter.h"
  12 #include "llvm/Support/DataExtractor.h"
  13 #include <algorithm>
  14 #include <inttypes.h>
  15
  16 using namespace llvm;
  17 using namespace gsym;
  18
  19
  20 void AddressRanges::insert(AddressRange Range) {
  21   if (Range.size() == 0)
  22     return;
  23
  24   auto It = llvm::upper_bound(Ranges, Range);
  25   auto It2 = It;
  26   while (It2 != Ranges.end() && It2->Start < Range.End)
  27     ++It2;
  28   if (It != It2) {
  29     Range.End = std::max(Range.End, It2[-1].End);
  30     It = Ranges.erase(It, It2);
  31   }
  32   if (It != Ranges.begin() && Range.Start < It[-1].End)
  33     It[-1].End = std::max(It[-1].End, Range.End);
  34   else
  35     Ranges.insert(It, Range);
  36 }
  37
  38 bool AddressRanges::contains(uint64_t Addr) const {
  39   auto It = std::partition_point(
  40       Ranges.begin(), Ranges.end(),
  41       [=](const AddressRange &R) { return R.Start <= Addr; });
  42   return It != Ranges.begin() && Addr < It[-1].End;
  43 }
  44
  45 bool AddressRanges::contains(AddressRange Range) const {
  46   if (Range.size() == 0)
  47     return false;
  48   auto It = std::partition_point(
  49       Ranges.begin(), Ranges.end(),
  50       [=](const AddressRange &R) { return R.Start <= Range.Start; });
  51   if (It == Ranges.begin())
  52     return false;
  53   return Range.End <= It[-1].End;
  54 }
  55
  56 raw_ostream &llvm::gsym::operator<<(raw_ostream &OS, const AddressRange &R) {
  57   return OS << '[' << HEX64(R.Start) << " - " << HEX64(R.End) << ")";
  58 }
  59
  60 raw_ostream &llvm::gsym::operator<<(raw_ostream &OS, const AddressRanges &AR) {
  61   size_t Size = AR.size();
  62   for (size_t I = 0; I < Size; ++I) {
  63     if (I)
  64       OS << ' ';
  65     OS << AR[I];
  66   }
  67   return OS;
  68 }
  69
  70 void AddressRange::encode(FileWriter &O, uint64_t BaseAddr) const {
  71   assert(Start >= BaseAddr);
  72   O.writeULEB(Start - BaseAddr);
  73   O.writeULEB(size());
  74 }
  75
  76 void AddressRange::decode(DataExtractor &Data, uint64_t BaseAddr,
  77                           uint64_t &Offset) {
  78   const uint64_t AddrOffset = Data.getULEB128(&Offset);
  79   const uint64_t Size = Data.getULEB128(&Offset);
  80   const uint64_t StartAddr = BaseAddr + AddrOffset;
  81   Start = StartAddr;
  82   End = StartAddr + Size;
  83 }
  84
  85 void AddressRanges::encode(FileWriter &O, uint64_t BaseAddr) const {
  86   O.writeULEB(Ranges.size());
  87   if (Ranges.empty())
  88     return;
  89   for (auto Range : Ranges)
  90     Range.encode(O, BaseAddr);
  91 }
  92
  93 void AddressRanges::decode(DataExtractor &Data, uint64_t BaseAddr,
  94                            uint64_t &Offset) {
  95   clear();
  96   uint64_t NumRanges = Data.getULEB128(&Offset);
  97   if (NumRanges == 0)
  98     return;
  99   Ranges.resize(NumRanges);
 100   for (auto &Range : Ranges)
 101     Range.decode(Data, BaseAddr, Offset);
 102 }