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1b96f8703a
Summary: Support alloca-referencing dbg.value in hwasan instrumentation. Update AsmPrinter to emit DW_AT_LLVM_tag_offset when location is in loclist format. Reviewers: pcc Subscribers: srhines, aprantl, hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D70753
48 lines
1.4 KiB
C++
48 lines
1.4 KiB
C++
//===- DebugLocStream.cpp - DWARF debug_loc stream --------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "DebugLocStream.h"
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#include "DwarfDebug.h"
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#include "llvm/CodeGen/AsmPrinter.h"
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using namespace llvm;
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bool DebugLocStream::finalizeList(AsmPrinter &Asm) {
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if (Lists.back().EntryOffset == Entries.size()) {
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// Empty list. Delete it.
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Lists.pop_back();
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return false;
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}
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// Real list. Generate a label for it.
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Lists.back().Label = Asm.createTempSymbol("debug_loc");
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return true;
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}
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void DebugLocStream::finalizeEntry() {
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if (Entries.back().ByteOffset != DWARFBytes.size())
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return;
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// The last entry was empty. Delete it.
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Comments.erase(Comments.begin() + Entries.back().CommentOffset,
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Comments.end());
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Entries.pop_back();
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assert(Lists.back().EntryOffset <= Entries.size() &&
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"Popped off more entries than are in the list");
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}
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DebugLocStream::ListBuilder::~ListBuilder() {
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if (!Locs.finalizeList(Asm))
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return;
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V.initializeDbgValue(&MI);
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V.setDebugLocListIndex(ListIndex);
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if (TagOffset)
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V.setDebugLocListTagOffset(*TagOffset);
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}
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