blob: 5f0ff0240da61ab6be1339af972899f2c5aef748 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
//===-- DWARFDebugLoc.cpp -------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "DWARFDebugLoc.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
void DWARFDebugLoc::dump(raw_ostream &OS) const {
for (const LocationList &L : Locations) {
OS << format("0x%8.8x: ", L.Offset);
const unsigned Indent = 12;
for (const Entry &E : L.Entries) {
if (&E != L.Entries.begin())
OS.indent(Indent);
OS << "Beginning address offset: " << format("0x%016" PRIx64, E.Begin)
<< '\n';
OS.indent(Indent) << " Ending address offset: "
<< format("0x%016" PRIx64, E.End) << '\n';
OS.indent(Indent) << " Location description: ";
for (unsigned char Loc : E.Loc) {
OS << format("%2.2x ", Loc);
}
OS << "\n\n";
}
}
}
void DWARFDebugLoc::parse(DataExtractor data, unsigned AddressSize) {
uint32_t Offset = 0;
while (data.isValidOffset(Offset+AddressSize-1)) {
Locations.resize(Locations.size() + 1);
LocationList &Loc = Locations.back();
Loc.Offset = Offset;
// 2.6.2 Location Lists
// A location list entry consists of:
while (true) {
Entry E;
RelocAddrMap::const_iterator AI = RelocMap.find(Offset);
// 1. A beginning address offset. ...
E.Begin = data.getUnsigned(&Offset, AddressSize);
if (AI != RelocMap.end())
E.Begin += AI->second.second;
AI = RelocMap.find(Offset);
// 2. An ending address offset. ...
E.End = data.getUnsigned(&Offset, AddressSize);
if (AI != RelocMap.end())
E.End += AI->second.second;
// The end of any given location list is marked by an end of list entry,
// which consists of a 0 for the beginning address offset and a 0 for the
// ending address offset.
if (E.Begin == 0 && E.End == 0)
break;
unsigned Bytes = data.getU16(&Offset);
// A single location description describing the location of the object...
StringRef str = data.getData().substr(Offset, Bytes);
Offset += Bytes;
E.Loc.reserve(str.size());
std::copy(str.begin(), str.end(), std::back_inserter(E.Loc));
Loc.Entries.push_back(std::move(E));
}
}
if (data.isValidOffset(Offset))
llvm::errs() << "error: failed to consume entire .debug_loc section\n";
}
|
