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 
15 using namespace lldb_private;
16 using namespace minidump;
17 
18 // MinidumpMiscInfo
19 const 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 
28 std::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
38 std::optional<LinuxProcStatus>
39 LinuxProcStatus::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 
59 lldb::pid_t LinuxProcStatus::GetPid() const { return pid; }
60 
61 std::pair<llvm::ArrayRef<MinidumpMemoryDescriptor64>, uint64_t>
62 MinidumpMemoryDescriptor64::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