004a264f8c
Our code for locating the shared library directory works via dladdr (or the windows equivalent) to locate the path of an address known to reside in liblldb. This works great for C++ programs, but there's a catch. When (lib)lldb is used from python (like in our test suite), this dladdr call will return a path to the _lldb.so (or such) file in the python directory. To compensate for this, we have code which attempts to resolve this symlink, to ensure we get the canonical location. However, here's the second catch. On windows, this file is not a symlink (but a copy), so this logic fails. Since most of our other paths are derived from the liblldb location, all of these paths will be wrong, when running the test suite. One effect of this was the failure to find lldb-server in D96202. To fix this issue, I add some windows-specific code to locate the liblldb directory. Since it cannot rely on symlinks, it works by manually walking the directory tree -- essentially doing the opposite of what we do when computing the python directory. To avoid python leaking back into the host code, I implement this with the help of a callback which can be passed to HostInfo::Initialize in order to assist with the directory location. The callback lives inside the python plugin. I also strenghten the existing path test to ensure the returned path is the right one. Differential Revision: https://reviews.llvm.org/D96779
142 lines
4.1 KiB
C++
142 lines
4.1 KiB
C++
//===-- HostInfoWindows.cpp -----------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Host/windows/windows.h"
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#include <objbase.h>
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#include <mutex>
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#include "lldb/Host/windows/HostInfoWindows.h"
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#include "lldb/Host/windows/PosixApi.h"
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#include "lldb/Utility/UserIDResolver.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/Support/ConvertUTF.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/Path.h"
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#include "llvm/Support/Threading.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace lldb_private;
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namespace {
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class WindowsUserIDResolver : public UserIDResolver {
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protected:
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llvm::Optional<std::string> DoGetUserName(id_t uid) override {
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return llvm::None;
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}
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llvm::Optional<std::string> DoGetGroupName(id_t gid) override {
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return llvm::None;
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}
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};
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} // namespace
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FileSpec HostInfoWindows::m_program_filespec;
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void HostInfoWindows::Initialize(SharedLibraryDirectoryHelper *helper) {
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::CoInitializeEx(nullptr, COINIT_MULTITHREADED);
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HostInfoBase::Initialize(helper);
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}
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void HostInfoWindows::Terminate() {
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HostInfoBase::Terminate();
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::CoUninitialize();
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}
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size_t HostInfoWindows::GetPageSize() {
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SYSTEM_INFO systemInfo;
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GetNativeSystemInfo(&systemInfo);
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return systemInfo.dwPageSize;
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}
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llvm::VersionTuple HostInfoWindows::GetOSVersion() {
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OSVERSIONINFOEX info;
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ZeroMemory(&info, sizeof(OSVERSIONINFOEX));
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info.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
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#pragma warning(push)
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#pragma warning(disable : 4996)
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// Starting with Microsoft SDK for Windows 8.1, this function is deprecated
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// in favor of the new Windows Version Helper APIs. Since we don't specify a
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// minimum SDK version, it's easier to simply disable the warning rather than
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// try to support both APIs.
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if (GetVersionEx((LPOSVERSIONINFO)&info) == 0)
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return llvm::VersionTuple();
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#pragma warning(pop)
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return llvm::VersionTuple(info.dwMajorVersion, info.dwMinorVersion,
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info.wServicePackMajor);
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}
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bool HostInfoWindows::GetOSBuildString(std::string &s) {
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s.clear();
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llvm::VersionTuple version = GetOSVersion();
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if (version.empty())
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return false;
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llvm::raw_string_ostream stream(s);
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stream << "Windows NT " << version.getAsString();
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return true;
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}
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bool HostInfoWindows::GetOSKernelDescription(std::string &s) {
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return GetOSBuildString(s);
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}
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bool HostInfoWindows::GetHostname(std::string &s) {
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wchar_t buffer[MAX_COMPUTERNAME_LENGTH + 1];
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DWORD dwSize = MAX_COMPUTERNAME_LENGTH + 1;
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if (!::GetComputerNameW(buffer, &dwSize))
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return false;
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// The conversion requires an empty string.
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s.clear();
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return llvm::convertWideToUTF8(buffer, s);
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}
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FileSpec HostInfoWindows::GetProgramFileSpec() {
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static llvm::once_flag g_once_flag;
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llvm::call_once(g_once_flag, []() {
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std::vector<wchar_t> buffer(PATH_MAX);
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::GetModuleFileNameW(NULL, buffer.data(), buffer.size());
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std::string path;
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llvm::convertWideToUTF8(buffer.data(), path);
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m_program_filespec.SetFile(path, FileSpec::Style::native);
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});
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return m_program_filespec;
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}
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FileSpec HostInfoWindows::GetDefaultShell() {
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// Try to retrieve ComSpec from the environment. On the rare occasion
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// that it fails, try a well-known path for ComSpec instead.
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std::string shell;
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if (GetEnvironmentVar("ComSpec", shell))
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return FileSpec(shell);
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return FileSpec("C:\\Windows\\system32\\cmd.exe");
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}
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bool HostInfoWindows::GetEnvironmentVar(const std::string &var_name,
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std::string &var) {
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std::wstring wvar_name;
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if (!llvm::ConvertUTF8toWide(var_name, wvar_name))
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return false;
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if (const wchar_t *wvar = _wgetenv(wvar_name.c_str()))
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return llvm::convertWideToUTF8(wvar, var);
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return false;
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}
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static llvm::ManagedStatic<WindowsUserIDResolver> g_user_id_resolver;
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UserIDResolver &HostInfoWindows::GetUserIDResolver() {
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return *g_user_id_resolver;
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}
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