compiler/utils/mips64/assembler_mips64.cc [42:66]:
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void Mips64Assembler::PatchCFI() {
  if (cfi().NumberOfDelayedAdvancePCs() == 0u) {
    return;
  }

  typedef DebugFrameOpCodeWriterForAssembler::DelayedAdvancePC DelayedAdvancePC;
  const auto data = cfi().ReleaseStreamAndPrepareForDelayedAdvancePC();
  const std::vector<uint8_t>& old_stream = data.first;
  const std::vector<DelayedAdvancePC>& advances = data.second;

  // Refill our data buffer with patched opcodes.
  cfi().ReserveCFIStream(old_stream.size() + advances.size() + 16);
  size_t stream_pos = 0;
  for (const DelayedAdvancePC& advance : advances) {
    DCHECK_GE(advance.stream_pos, stream_pos);
    // Copy old data up to the point where advance was issued.
    cfi().AppendRawData(old_stream, stream_pos, advance.stream_pos);
    stream_pos = advance.stream_pos;
    // Insert the advance command with its final offset.
    size_t final_pc = GetAdjustedPosition(advance.pc);
    cfi().AdvancePC(final_pc);
  }
  // Copy the final segment if any.
  cfi().AppendRawData(old_stream, stream_pos, old_stream.size());
}
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compiler/utils/arm/assembler_thumb2.cc [299:323]:
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void Thumb2Assembler::PatchCFI() {
  if (cfi().NumberOfDelayedAdvancePCs() == 0u) {
    return;
  }

  typedef DebugFrameOpCodeWriterForAssembler::DelayedAdvancePC DelayedAdvancePC;
  const auto data = cfi().ReleaseStreamAndPrepareForDelayedAdvancePC();
  const std::vector<uint8_t>& old_stream = data.first;
  const std::vector<DelayedAdvancePC>& advances = data.second;

  // Refill our data buffer with patched opcodes.
  cfi().ReserveCFIStream(old_stream.size() + advances.size() + 16);
  size_t stream_pos = 0;
  for (const DelayedAdvancePC& advance : advances) {
    DCHECK_GE(advance.stream_pos, stream_pos);
    // Copy old data up to the point where advance was issued.
    cfi().AppendRawData(old_stream, stream_pos, advance.stream_pos);
    stream_pos = advance.stream_pos;
    // Insert the advance command with its final offset.
    size_t final_pc = GetAdjustedPosition(advance.pc);
    cfi().AdvancePC(final_pc);
  }
  // Copy the final segment if any.
  cfi().AppendRawData(old_stream, stream_pos, old_stream.size());
}
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