1 //===-- HostInfoWindows.cpp -------------------------------------*- C++ -*-===//
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 "lldb/Host/windows/windows.h"
10 
11 #include <objbase.h>
12 
13 #include <mutex>
14 
15 #include "lldb/Host/windows/HostInfoWindows.h"
16 #include "lldb/Host/windows/PosixApi.h"
17 #include "lldb/Utility/UserIDResolver.h"
18 #include "llvm/ADT/SmallString.h"
19 #include "llvm/Support/ConvertUTF.h"
20 #include "llvm/Support/FileSystem.h"
21 #include "llvm/Support/ManagedStatic.h"
22 #include "llvm/Support/Path.h"
23 #include "llvm/Support/Threading.h"
24 #include "llvm/Support/raw_ostream.h"
25 
26 using namespace lldb_private;
27 
28 namespace {
29 class WindowsUserIDResolver : public UserIDResolver {
30 protected:
31   llvm::Optional<std::string> DoGetUserName(id_t uid) override {
32     return llvm::None;
33   }
34   llvm::Optional<std::string> DoGetGroupName(id_t gid) override {
35     return llvm::None;
36   }
37 };
38 } // namespace
39 
40 FileSpec HostInfoWindows::m_program_filespec;
41 
42 void HostInfoWindows::Initialize() {
43   ::CoInitializeEx(nullptr, COINIT_MULTITHREADED);
44   HostInfoBase::Initialize();
45 }
46 
47 void HostInfoWindows::Terminate() {
48   HostInfoBase::Terminate();
49   ::CoUninitialize();
50 }
51 
52 size_t HostInfoWindows::GetPageSize() {
53   SYSTEM_INFO systemInfo;
54   GetNativeSystemInfo(&systemInfo);
55   return systemInfo.dwPageSize;
56 }
57 
58 llvm::VersionTuple HostInfoWindows::GetOSVersion() {
59   OSVERSIONINFOEX info;
60 
61   ZeroMemory(&info, sizeof(OSVERSIONINFOEX));
62   info.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
63 #pragma warning(push)
64 #pragma warning(disable : 4996)
65   // Starting with Microsoft SDK for Windows 8.1, this function is deprecated
66   // in favor of the new Windows Version Helper APIs.  Since we don't specify a
67   // minimum SDK version, it's easier to simply disable the warning rather than
68   // try to support both APIs.
69   if (GetVersionEx((LPOSVERSIONINFO)&info) == 0)
70     return llvm::VersionTuple();
71 #pragma warning(pop)
72 
73   return llvm::VersionTuple(info.dwMajorVersion, info.dwMinorVersion,
74                             info.wServicePackMajor);
75 }
76 
77 bool HostInfoWindows::GetOSBuildString(std::string &s) {
78   s.clear();
79   llvm::VersionTuple version = GetOSVersion();
80   if (version.empty())
81     return false;
82 
83   llvm::raw_string_ostream stream(s);
84   stream << "Windows NT " << version.getAsString();
85   return true;
86 }
87 
88 bool HostInfoWindows::GetOSKernelDescription(std::string &s) {
89   return GetOSBuildString(s);
90 }
91 
92 bool HostInfoWindows::GetHostname(std::string &s) {
93   wchar_t buffer[MAX_COMPUTERNAME_LENGTH + 1];
94   DWORD dwSize = MAX_COMPUTERNAME_LENGTH + 1;
95   if (!::GetComputerNameW(buffer, &dwSize))
96     return false;
97 
98   return llvm::convertWideToUTF8(buffer, s);
99 }
100 
101 FileSpec HostInfoWindows::GetProgramFileSpec() {
102   static llvm::once_flag g_once_flag;
103   llvm::call_once(g_once_flag, []() {
104     std::vector<wchar_t> buffer(PATH_MAX);
105     ::GetModuleFileNameW(NULL, buffer.data(), buffer.size());
106     std::string path;
107     llvm::convertWideToUTF8(buffer.data(), path);
108     m_program_filespec.SetFile(path, FileSpec::Style::native);
109   });
110   return m_program_filespec;
111 }
112 
113 FileSpec HostInfoWindows::GetDefaultShell() {
114   // Try to retrieve ComSpec from the environment. On the rare occasion
115   // that it fails, try a well-known path for ComSpec instead.
116 
117   std::string shell;
118   if (GetEnvironmentVar("ComSpec", shell))
119     return FileSpec(shell);
120 
121   return FileSpec("C:\\Windows\\system32\\cmd.exe");
122 }
123 
124 bool HostInfoWindows::GetEnvironmentVar(const std::string &var_name,
125                                         std::string &var) {
126   std::wstring wvar_name;
127   if (!llvm::ConvertUTF8toWide(var_name, wvar_name))
128     return false;
129 
130   if (const wchar_t *wvar = _wgetenv(wvar_name.c_str()))
131     return llvm::convertWideToUTF8(wvar, var);
132   return false;
133 }
134 
135 static llvm::ManagedStatic<WindowsUserIDResolver> g_user_id_resolver;
136 
137 UserIDResolver &HostInfoWindows::GetUserIDResolver() {
138   return *g_user_id_resolver;
139 }
140