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
Parse(llvm::ArrayRef<uint8_t> & data)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
GetPid() const28 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>
Parse(llvm::ArrayRef<uint8_t> & data)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
GetPid() const59 lldb::pid_t LinuxProcStatus::GetPid() const { return pid; }
60
61 std::pair<llvm::ArrayRef<MinidumpMemoryDescriptor64>, uint64_t>
ParseMemory64List(llvm::ArrayRef<uint8_t> & data)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