1 //===- DebugLocStream.cpp - DWARF debug_loc stream --------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "DebugLocStream.h" 10 #include "DwarfDebug.h" 11 #include "llvm/CodeGen/AsmPrinter.h" 12 13 using namespace llvm; 14 15 bool DebugLocStream::finalizeList(AsmPrinter &Asm) { 16 if (Lists.back().EntryOffset == Entries.size()) { 17 // Empty list. Delete it. 18 Lists.pop_back(); 19 return false; 20 } 21 22 // Real list. Generate a label for it. 23 Lists.back().Label = Asm.createTempSymbol("debug_loc"); 24 return true; 25 } 26 27 void DebugLocStream::finalizeEntry() { 28 if (Entries.back().ByteOffset != DWARFBytes.size()) 29 return; 30 31 // The last entry was empty. Delete it. 32 Comments.erase(Comments.begin() + Entries.back().CommentOffset, 33 Comments.end()); 34 Entries.pop_back(); 35 36 assert(Lists.back().EntryOffset <= Entries.size() && 37 "Popped off more entries than are in the list"); 38 } 39 40 DebugLocStream::ListBuilder::~ListBuilder() { 41 if (!Locs.finalizeList(Asm)) 42 return; 43 V.initializeDbgValue(&MI); 44 V.setDebugLocListIndex(ListIndex); 45 if (TagOffset) 46 V.setDebugLocListTagOffset(*TagOffset); 47 } 48