1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
//===-- ProcessLauncherWindows.cpp ----------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "lldb/Host/windows/ProcessLauncherWindows.h"
#include "lldb/Host/HostProcess.h"
#include "lldb/Host/ProcessLaunchInfo.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/ConvertUTF.h"
#include "llvm/Support/Program.h"
#include <string>
#include <vector>
using namespace lldb;
using namespace lldb_private;
namespace {
void CreateEnvironmentBuffer(const Environment &env,
std::vector<char> &buffer) {
// The buffer is a list of null-terminated UTF-16 strings, followed by an
// extra L'\0' (two bytes of 0). An empty environment must have one
// empty string, followed by an extra L'\0'.
for (const auto &KV : env) {
std::wstring warg;
if (llvm::ConvertUTF8toWide(Environment::compose(KV), warg)) {
buffer.insert(
buffer.end(), reinterpret_cast<const char *>(warg.c_str()),
reinterpret_cast<const char *>(warg.c_str() + warg.size() + 1));
}
}
// One null wchar_t (to end the block) is two null bytes
buffer.push_back(0);
buffer.push_back(0);
// Insert extra two bytes, just in case the environment was empty.
buffer.push_back(0);
buffer.push_back(0);
}
bool GetFlattenedWindowsCommandString(Args args, std::string &command) {
if (args.empty())
return false;
std::vector<llvm::StringRef> args_ref;
for (auto &entry : args.entries())
args_ref.push_back(entry.ref());
command = llvm::sys::flattenWindowsCommandLine(args_ref);
return true;
}
} // namespace
HostProcess
ProcessLauncherWindows::LaunchProcess(const ProcessLaunchInfo &launch_info,
Status &error) {
error.Clear();
std::string executable;
std::string commandLine;
std::vector<char> environment;
STARTUPINFO startupinfo = {};
PROCESS_INFORMATION pi = {};
HANDLE stdin_handle = GetStdioHandle(launch_info, STDIN_FILENO);
HANDLE stdout_handle = GetStdioHandle(launch_info, STDOUT_FILENO);
HANDLE stderr_handle = GetStdioHandle(launch_info, STDERR_FILENO);
startupinfo.cb = sizeof(startupinfo);
startupinfo.dwFlags |= STARTF_USESTDHANDLES;
startupinfo.hStdError =
stderr_handle ? stderr_handle : ::GetStdHandle(STD_ERROR_HANDLE);
startupinfo.hStdInput =
stdin_handle ? stdin_handle : ::GetStdHandle(STD_INPUT_HANDLE);
startupinfo.hStdOutput =
stdout_handle ? stdout_handle : ::GetStdHandle(STD_OUTPUT_HANDLE);
const char *hide_console_var =
getenv("LLDB_LAUNCH_INFERIORS_WITHOUT_CONSOLE");
if (hide_console_var &&
llvm::StringRef(hide_console_var).equals_lower("true")) {
startupinfo.dwFlags |= STARTF_USESHOWWINDOW;
startupinfo.wShowWindow = SW_HIDE;
}
DWORD flags = CREATE_NEW_CONSOLE | CREATE_UNICODE_ENVIRONMENT;
if (launch_info.GetFlags().Test(eLaunchFlagDebug))
flags |= DEBUG_ONLY_THIS_PROCESS;
if (launch_info.GetFlags().Test(eLaunchFlagDisableSTDIO))
flags &= ~CREATE_NEW_CONSOLE;
LPVOID env_block = nullptr;
::CreateEnvironmentBuffer(launch_info.GetEnvironment(), environment);
env_block = environment.data();
executable = launch_info.GetExecutableFile().GetPath();
GetFlattenedWindowsCommandString(launch_info.GetArguments(), commandLine);
std::wstring wexecutable, wcommandLine, wworkingDirectory;
llvm::ConvertUTF8toWide(executable, wexecutable);
llvm::ConvertUTF8toWide(commandLine, wcommandLine);
llvm::ConvertUTF8toWide(launch_info.GetWorkingDirectory().GetCString(),
wworkingDirectory);
// If the command line is empty, it's best to pass a null pointer to tell
// CreateProcessW to use the executable name as the command line. If the
// command line is not empty, its contents may be modified by CreateProcessW.
WCHAR *pwcommandLine = wcommandLine.empty() ? nullptr : &wcommandLine[0];
BOOL result = ::CreateProcessW(
wexecutable.c_str(), pwcommandLine, NULL, NULL, TRUE, flags, env_block,
wworkingDirectory.size() == 0 ? NULL : wworkingDirectory.c_str(),
&startupinfo, &pi);
if (!result) {
// Call GetLastError before we make any other system calls.
error.SetError(::GetLastError(), eErrorTypeWin32);
// Note that error 50 ("The request is not supported") will occur if you
// try debug a 64-bit inferior from a 32-bit LLDB.
}
if (result) {
// Do not call CloseHandle on pi.hProcess, since we want to pass that back
// through the HostProcess.
::CloseHandle(pi.hThread);
}
if (stdin_handle)
::CloseHandle(stdin_handle);
if (stdout_handle)
::CloseHandle(stdout_handle);
if (stderr_handle)
::CloseHandle(stderr_handle);
if (!result)
return HostProcess();
return HostProcess(pi.hProcess);
}
HANDLE
ProcessLauncherWindows::GetStdioHandle(const ProcessLaunchInfo &launch_info,
int fd) {
const FileAction *action = launch_info.GetFileActionForFD(fd);
if (action == nullptr)
return NULL;
SECURITY_ATTRIBUTES secattr = {};
secattr.nLength = sizeof(SECURITY_ATTRIBUTES);
secattr.bInheritHandle = TRUE;
llvm::StringRef path = action->GetPath();
DWORD access = 0;
DWORD share = FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE;
DWORD create = 0;
DWORD flags = 0;
if (fd == STDIN_FILENO) {
access = GENERIC_READ;
create = OPEN_EXISTING;
flags = FILE_ATTRIBUTE_READONLY;
}
if (fd == STDOUT_FILENO || fd == STDERR_FILENO) {
access = GENERIC_WRITE;
create = CREATE_ALWAYS;
if (fd == STDERR_FILENO)
flags = FILE_FLAG_WRITE_THROUGH;
}
std::wstring wpath;
llvm::ConvertUTF8toWide(path, wpath);
HANDLE result = ::CreateFileW(wpath.c_str(), access, share, &secattr, create,
flags, NULL);
return (result == INVALID_HANDLE_VALUE) ? NULL : result;
}
|
