1 //===-- HostInfoWindows.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 "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:
DoGetUserName(id_t uid)31 llvm::Optional<std::string> DoGetUserName(id_t uid) override {
32 return llvm::None;
33 }
DoGetGroupName(id_t gid)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
Initialize(SharedLibraryDirectoryHelper * helper)42 void HostInfoWindows::Initialize(SharedLibraryDirectoryHelper *helper) {
43 ::CoInitializeEx(nullptr, COINIT_MULTITHREADED);
44 HostInfoBase::Initialize(helper);
45 }
46
Terminate()47 void HostInfoWindows::Terminate() {
48 HostInfoBase::Terminate();
49 ::CoUninitialize();
50 }
51
GetPageSize()52 size_t HostInfoWindows::GetPageSize() {
53 SYSTEM_INFO systemInfo;
54 GetNativeSystemInfo(&systemInfo);
55 return systemInfo.dwPageSize;
56 }
57
GetOSVersion()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
GetOSBuildString()77 llvm::Optional<std::string> HostInfoWindows::GetOSBuildString() {
78 llvm::VersionTuple version = GetOSVersion();
79 if (version.empty())
80 return llvm::None;
81
82 return "Windows NT " + version.getAsString();
83 }
84
GetOSKernelDescription()85 llvm::Optional<std::string> HostInfoWindows::GetOSKernelDescription() {
86 return GetOSBuildString();
87 }
88
GetHostname(std::string & s)89 bool HostInfoWindows::GetHostname(std::string &s) {
90 wchar_t buffer[MAX_COMPUTERNAME_LENGTH + 1];
91 DWORD dwSize = MAX_COMPUTERNAME_LENGTH + 1;
92 if (!::GetComputerNameW(buffer, &dwSize))
93 return false;
94
95 // The conversion requires an empty string.
96 s.clear();
97 return llvm::convertWideToUTF8(buffer, s);
98 }
99
GetProgramFileSpec()100 FileSpec HostInfoWindows::GetProgramFileSpec() {
101 static llvm::once_flag g_once_flag;
102 llvm::call_once(g_once_flag, []() {
103 std::vector<wchar_t> buffer(PATH_MAX);
104 ::GetModuleFileNameW(NULL, buffer.data(), buffer.size());
105 std::string path;
106 llvm::convertWideToUTF8(buffer.data(), path);
107 m_program_filespec.SetFile(path, FileSpec::Style::native);
108 });
109 return m_program_filespec;
110 }
111
GetDefaultShell()112 FileSpec HostInfoWindows::GetDefaultShell() {
113 // Try to retrieve ComSpec from the environment. On the rare occasion
114 // that it fails, try a well-known path for ComSpec instead.
115
116 std::string shell;
117 if (GetEnvironmentVar("ComSpec", shell))
118 return FileSpec(shell);
119
120 return FileSpec("C:\\Windows\\system32\\cmd.exe");
121 }
122
GetEnvironmentVar(const std::string & var_name,std::string & var)123 bool HostInfoWindows::GetEnvironmentVar(const std::string &var_name,
124 std::string &var) {
125 std::wstring wvar_name;
126 if (!llvm::ConvertUTF8toWide(var_name, wvar_name))
127 return false;
128
129 if (const wchar_t *wvar = _wgetenv(wvar_name.c_str()))
130 return llvm::convertWideToUTF8(wvar, var);
131 return false;
132 }
133
134 static llvm::ManagedStatic<WindowsUserIDResolver> g_user_id_resolver;
135
GetUserIDResolver()136 UserIDResolver &HostInfoWindows::GetUserIDResolver() {
137 return *g_user_id_resolver;
138 }
139