Mercurial > hg > CbC > CbC_llvm

annotate lib/CodeGen/AsmPrinter/AddressPool.cpp @ 147:c2174574ed3a

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
LLVM 10
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Wed, 14 Aug 2019 16:55:33 +0900
parents 3a76565eade5
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
121
803732b1fca8 LLVM 5.0
kono
parents: 120
diff changeset
1 //===- llvm/CodeGen/AddressPool.cpp - Dwarf Debug Framework ---------------===//
77
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
2 //
147
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
4 // See https://llvm.org/LICENSE.txt for license information.
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
77
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
6 //
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
7 //===----------------------------------------------------------------------===//
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
8
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
9 #include "AddressPool.h"
121
803732b1fca8 LLVM 5.0
kono
parents: 120
diff changeset
10 #include "llvm/ADT/SmallVector.h"
77
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
11 #include "llvm/CodeGen/AsmPrinter.h"
121
803732b1fca8 LLVM 5.0
kono
parents: 120
diff changeset
12 #include "llvm/IR/DataLayout.h"
77
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
13 #include "llvm/MC/MCStreamer.h"
147
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
14 #include "llvm/Target/TargetLoweringObjectFile.h"
121
803732b1fca8 LLVM 5.0
kono
parents: 120
diff changeset
15 #include <utility>
77
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
16
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
17 using namespace llvm;
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
18
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
19 unsigned AddressPool::getIndex(const MCSymbol *Sym, bool TLS) {
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
20 HasBeenUsed = true;
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
21 auto IterBool =
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
22 Pool.insert(std::make_pair(Sym, AddressPoolEntry(Pool.size(), TLS)));
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
23 return IterBool.first->second.Number;
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
24 }
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
25
147
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
26 MCSymbol *AddressPool::emitHeader(AsmPrinter &Asm, MCSection *Section) {
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
27 static const uint8_t AddrSize = Asm.getDataLayout().getPointerSize();
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
28 StringRef Prefix = "debug_addr_";
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
29 MCSymbol *BeginLabel = Asm.createTempSymbol(Prefix + "start");
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
30 MCSymbol *EndLabel = Asm.createTempSymbol(Prefix + "end");
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
31
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
32 Asm.OutStreamer->AddComment("Length of contribution");
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
33 Asm.EmitLabelDifference(EndLabel, BeginLabel,
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
34 4); // TODO: Support DWARF64 format.
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
35 Asm.OutStreamer->EmitLabel(BeginLabel);
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
36 Asm.OutStreamer->AddComment("DWARF version number");
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
37 Asm.emitInt16(Asm.getDwarfVersion());
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
38 Asm.OutStreamer->AddComment("Address size");
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
39 Asm.emitInt8(AddrSize);
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
40 Asm.OutStreamer->AddComment("Segment selector size");
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
41 Asm.emitInt8(0); // TODO: Support non-zero segment_selector_size.
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
42
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
43 return EndLabel;
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
44 }
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
45
77
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
46 // Emit addresses into the section given.
95
afa8332a0e37 LLVM 3.8
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 77
diff changeset
47 void AddressPool::emit(AsmPrinter &Asm, MCSection *AddrSection) {
147
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
48 if (isEmpty())
77
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
49 return;
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
50
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
51 // Start the dwarf addr section.
95
afa8332a0e37 LLVM 3.8
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 77
diff changeset
52 Asm.OutStreamer->SwitchSection(AddrSection);
77
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
53
147
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
54 MCSymbol *EndLabel = nullptr;
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
55
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
56 if (Asm.getDwarfVersion() >= 5)
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
57 EndLabel = emitHeader(Asm, AddrSection);
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
58
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
59 // Define the symbol that marks the start of the contribution.
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
60 // It is referenced via DW_AT_addr_base.
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
61 Asm.OutStreamer->EmitLabel(AddressTableBaseSym);
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
62
77
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
63 // Order the address pool entries by ID
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
64 SmallVector<const MCExpr *, 64> Entries(Pool.size());
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
65
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
66 for (const auto &I : Pool)
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
67 Entries[I.second.Number] =
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
68 I.second.TLS
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
69 ? Asm.getObjFileLowering().getDebugThreadLocalSymbol(I.first)
95
afa8332a0e37 LLVM 3.8
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 77
diff changeset
70 : MCSymbolRefExpr::create(I.first, Asm.OutContext);
77
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
71
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
72 for (const MCExpr *Entry : Entries)
95
afa8332a0e37 LLVM 3.8
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 77
diff changeset
73 Asm.OutStreamer->EmitValue(Entry, Asm.getDataLayout().getPointerSize());
147
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
74
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
75 if (EndLabel)
c2174574ed3a LLVM 10
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents: 134
diff changeset
76 Asm.OutStreamer->EmitLabel(EndLabel);
77
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
77 }