1//===-- MinidumpTypes.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 "MinidumpTypes.h"
10#include <optional>
11
12// C includes
13// C++ includes
14
15using namespace lldb_private;
16using namespace minidump;
17
18// MinidumpMiscInfo
19const MinidumpMiscInfo *MinidumpMiscInfo::Parse(llvm::ArrayRef<uint8_t> &data) {
20  const MinidumpMiscInfo *misc_info;
21  Status error = consumeObject(data, misc_info);
22  if (error.Fail())
23    return nullptr;
24
25  return misc_info;
26}
27
28std::optional<lldb::pid_t> MinidumpMiscInfo::GetPid() const {
29  uint32_t pid_flag = static_cast<uint32_t>(MinidumpMiscInfoFlags::ProcessID);
30  if (flags1 & pid_flag)
31    return std::optional<lldb::pid_t>(process_id);
32
33  return std::nullopt;
34}
35
36// Linux Proc Status
37// it's stored as an ascii string in the file
38std::optional<LinuxProcStatus>
39LinuxProcStatus::Parse(llvm::ArrayRef<uint8_t> &data) {
40  LinuxProcStatus result;
41  result.proc_status =
42      llvm::StringRef(reinterpret_cast<const char *>(data.data()), data.size());
43  data = data.drop_front(data.size());
44
45  llvm::SmallVector<llvm::StringRef, 0> lines;
46  result.proc_status.split(lines, '\n', 42);
47  // /proc/$pid/status has 41 lines, but why not use 42?
48  for (auto line : lines) {
49    if (line.consume_front("Pid:")) {
50      line = line.trim();
51      if (!line.getAsInteger(10, result.pid))
52        return result;
53    }
54  }
55
56  return std::nullopt;
57}
58
59lldb::pid_t LinuxProcStatus::GetPid() const { return pid; }
60
61std::pair<llvm::ArrayRef<MinidumpMemoryDescriptor64>, uint64_t>
62MinidumpMemoryDescriptor64::ParseMemory64List(llvm::ArrayRef<uint8_t> &data) {
63  const llvm::support::ulittle64_t *mem_ranges_count;
64  Status error = consumeObject(data, mem_ranges_count);
65  if (error.Fail() ||
66      *mem_ranges_count * sizeof(MinidumpMemoryDescriptor64) > data.size())
67    return {};
68
69  const llvm::support::ulittle64_t *base_rva;
70  error = consumeObject(data, base_rva);
71  if (error.Fail())
72    return {};
73
74  return std::make_pair(
75      llvm::ArrayRef(
76          reinterpret_cast<const MinidumpMemoryDescriptor64 *>(data.data()),
77          *mem_ranges_count),
78      *base_rva);
79}
80