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DWARFDebugAranges.cpp
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1//===-- DWARFDebugAranges.cpp ---------------------------------------------===//
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 "DWARFDebugAranges.h"
10#include "DWARFDebugArangeSet.h"
11#include "DWARFUnit.h"
12#include "LogChannelDWARF.h"
13#include "lldb/Utility/Log.h"
14#include "lldb/Utility/Timer.h"
15
16using namespace lldb;
17using namespace lldb_private;
18using namespace lldb_private::plugin::dwarf;
19
20// Constructor
22
23// CountArangeDescriptors
25public:
26 CountArangeDescriptors(uint32_t &count_ref) : count(count_ref) {
27 // printf("constructor CountArangeDescriptors()\n");
28 }
30 count += set.NumDescriptors();
31 }
32 uint32_t &count;
33};
34
35// Extract
36void DWARFDebugAranges::extract(const DWARFDataExtractor &debug_aranges_data) {
37 lldb::offset_t offset = 0;
38
40 Range range;
41 while (debug_aranges_data.ValidOffset(offset)) {
42 const lldb::offset_t set_offset = offset;
43 if (llvm::Error error = set.extract(debug_aranges_data, &offset)) {
45 LLDB_LOG_ERROR(log, std::move(error),
46 "DWARFDebugAranges::extract failed to extract "
47 ".debug_aranges set at offset {1:x}: {0}",
48 set_offset);
49 } else {
50 const uint32_t num_descriptors = set.NumDescriptors();
51 if (num_descriptors > 0) {
52 const dw_offset_t cu_offset = set.GetHeader().cu_offset;
53
54 for (uint32_t i = 0; i < num_descriptors; ++i) {
55 const DWARFDebugArangeSet::Descriptor &descriptor =
56 set.GetDescriptorRef(i);
58 descriptor.length, cu_offset));
59 }
60 }
61 }
62 // Always use the previous DWARFDebugArangeSet's information to calculate
63 // the offset of the next DWARFDebugArangeSet in case we entouncter an
64 // error in the current DWARFDebugArangeSet and our offset position is
65 // still in the middle of the data. If we do this, we can parse all valid
66 // DWARFDebugArangeSet objects without returning invalid errors.
67 offset = set.GetNextOffset();
68 set.Clear();
69 }
70}
71
72void DWARFDebugAranges::Dump(Log *log) const {
73 if (log == nullptr)
74 return;
75
76 const size_t num_entries = m_aranges.GetSize();
77 for (size_t i = 0; i < num_entries; ++i) {
79 if (entry)
80 LLDB_LOG(log, "{0:x8}: [{1:x16} - {2:x16})", entry->data,
81 entry->GetRangeBase(), entry->GetRangeEnd());
82 }
83}
84
86 dw_addr_t high_pc) {
87 if (high_pc > low_pc)
88 m_aranges.Append(RangeToDIE::Entry(low_pc, high_pc - low_pc, offset));
89}
90
91void DWARFDebugAranges::Sort(bool minimize) {
92 LLDB_SCOPED_TIMERF("%s this = %p", LLVM_PRETTY_FUNCTION,
93 static_cast<void *>(this));
94
97}
98
99// FindAddress
101 const RangeToDIE::Entry *entry = m_aranges.FindEntryThatContains(address);
102 if (entry)
103 return entry->data;
104 return DW_INVALID_OFFSET;
105}
static llvm::raw_ostream & error(Stream &strm)
#define LLDB_LOG(log,...)
The LLDB_LOG* macros defined below are the way to emit log messages.
Definition: Log.h:359
#define LLDB_LOG_ERROR(log, error,...)
Definition: Log.h:382
#define LLDB_SCOPED_TIMERF(...)
Definition: Timer.h:86
CountArangeDescriptors(uint32_t &count_ref)
void operator()(const DWARFDebugArangeSet &set)
bool ValidOffset(lldb::offset_t offset) const
Test the validity of offset.
void CombineConsecutiveEntriesWithEqualData()
Definition: RangeMap.h:486
const Entry * GetEntryAtIndex(size_t i) const
Definition: RangeMap.h:528
void Append(const Entry &entry)
Definition: RangeMap.h:451
Entry * FindEntryThatContains(B addr)
Definition: RangeMap.h:563
const Descriptor & GetDescriptorRef(uint32_t i) const
llvm::Error extract(const DWARFDataExtractor &data, lldb::offset_t *offset_ptr)
void extract(const DWARFDataExtractor &debug_aranges_data)
dw_offset_t FindAddress(dw_addr_t address) const
void AppendRange(dw_offset_t cu_offset, dw_addr_t low_pc, dw_addr_t high_pc)
uint64_t dw_offset_t
Definition: dwarf.h:31
#define DW_INVALID_OFFSET
Definition: dwarf.h:36
uint64_t dw_addr_t
Definition: dwarf.h:27
A class that represents a running process on the host machine.
Log * GetLog(Cat mask)
Retrieve the Log object for the channel associated with the given log enum.
Definition: Log.h:331
Definition: SBAddress.h:15
uint64_t offset_t
Definition: lldb-types.h:85
BaseType GetRangeBase() const
Definition: RangeMap.h:45
BaseType GetRangeEnd() const
Definition: RangeMap.h:78
uint32_t cu_offset
The offset from the beginning of the .debug_info section of the compilation unit entry referenced by ...