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llvm-capstone/lldb/source/Target/ProcessLaunchInfo.cpp
Pavel Labath 1d5855b107 Replace getcwd with the llvm equivalent 
Summary:
getcwd() is not available (well.. um.. deprecated?) on windows, and the way
PosixApi.h is providing it causes strange compile errors when it's included in
the wrong order. The best way to avoid that is to just not use chdir.

This replaces all uses of getcwd in generic code. There are still a couple of
more uses, but these are in platform-specific code.

chdir() is causing a similar problem, but for that there is no llvm equivalent
for that (yet).

Reviewers: zturner

Subscribers: lldb-commits

Differential Revision: https://reviews.llvm.org/D28858

llvm-svn: 292795
2017-01-23 15:56:45 +00:00

446 lines
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//===-- ProcessLaunchInfo.cpp -----------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// C Includes
// C++ Includes
#include <climits>
// Other libraries and framework includes
// Project includes
#include "lldb/Core/Debugger.h"
#include "lldb/Core/Log.h"
#include "lldb/Host/Config.h"
#include "lldb/Host/FileSystem.h"
#include "lldb/Host/HostInfo.h"
#include "lldb/Target/FileAction.h"
#include "lldb/Target/ProcessLaunchInfo.h"
#include "lldb/Target/Target.h"
#include "llvm/Support/ConvertUTF.h"
#include "llvm/Support/FileSystem.h"
#if !defined(_WIN32)
#include <limits.h>
#endif
using namespace lldb;
using namespace lldb_private;
//----------------------------------------------------------------------------
// ProcessLaunchInfo member functions
//----------------------------------------------------------------------------
ProcessLaunchInfo::ProcessLaunchInfo()
: ProcessInfo(), m_working_dir(), m_plugin_name(), m_flags(0),
m_file_actions(), m_pty(new lldb_utility::PseudoTerminal),
m_resume_count(0), m_monitor_callback(nullptr),
m_monitor_callback_baton(nullptr), m_monitor_signals(false),
m_listener_sp(), m_hijack_listener_sp() {}
ProcessLaunchInfo::ProcessLaunchInfo(const FileSpec &stdin_file_spec,
const FileSpec &stdout_file_spec,
const FileSpec &stderr_file_spec,
const FileSpec &working_directory,
uint32_t launch_flags)
: ProcessInfo(), m_working_dir(), m_plugin_name(), m_flags(launch_flags),
m_file_actions(), m_pty(new lldb_utility::PseudoTerminal),
m_resume_count(0), m_monitor_callback(nullptr),
m_monitor_callback_baton(nullptr), m_monitor_signals(false),
m_listener_sp(), m_hijack_listener_sp() {
if (stdin_file_spec) {
FileAction file_action;
const bool read = true;
const bool write = false;
if (file_action.Open(STDIN_FILENO, stdin_file_spec, read, write))
AppendFileAction(file_action);
}
if (stdout_file_spec) {
FileAction file_action;
const bool read = false;
const bool write = true;
if (file_action.Open(STDOUT_FILENO, stdout_file_spec, read, write))
AppendFileAction(file_action);
}
if (stderr_file_spec) {
FileAction file_action;
const bool read = false;
const bool write = true;
if (file_action.Open(STDERR_FILENO, stderr_file_spec, read, write))
AppendFileAction(file_action);
}
if (working_directory)
SetWorkingDirectory(working_directory);
}
bool ProcessLaunchInfo::AppendCloseFileAction(int fd) {
FileAction file_action;
if (file_action.Close(fd)) {
AppendFileAction(file_action);
return true;
}
return false;
}
bool ProcessLaunchInfo::AppendDuplicateFileAction(int fd, int dup_fd) {
FileAction file_action;
if (file_action.Duplicate(fd, dup_fd)) {
AppendFileAction(file_action);
return true;
}
return false;
}
bool ProcessLaunchInfo::AppendOpenFileAction(int fd, const FileSpec &file_spec,
bool read, bool write) {
FileAction file_action;
if (file_action.Open(fd, file_spec, read, write)) {
AppendFileAction(file_action);
return true;
}
return false;
}
bool ProcessLaunchInfo::AppendSuppressFileAction(int fd, bool read,
bool write) {
FileAction file_action;
if (file_action.Open(fd, FileSpec{FileSystem::DEV_NULL, false}, read,
write)) {
AppendFileAction(file_action);
return true;
}
return false;
}
const FileAction *ProcessLaunchInfo::GetFileActionAtIndex(size_t idx) const {
if (idx < m_file_actions.size())
return &m_file_actions[idx];
return nullptr;
}
const FileAction *ProcessLaunchInfo::GetFileActionForFD(int fd) const {
for (size_t idx = 0, count = m_file_actions.size(); idx < count; ++idx) {
if (m_file_actions[idx].GetFD() == fd)
return &m_file_actions[idx];
}
return nullptr;
}
const FileSpec &ProcessLaunchInfo::GetWorkingDirectory() const {
return m_working_dir;
}
void ProcessLaunchInfo::SetWorkingDirectory(const FileSpec &working_dir) {
m_working_dir = working_dir;
}
const char *ProcessLaunchInfo::GetProcessPluginName() const {
return (m_plugin_name.empty() ? nullptr : m_plugin_name.c_str());
}
void ProcessLaunchInfo::SetProcessPluginName(llvm::StringRef plugin) {
m_plugin_name = plugin;
}
const FileSpec &ProcessLaunchInfo::GetShell() const { return m_shell; }
void ProcessLaunchInfo::SetShell(const FileSpec &shell) {
m_shell = shell;
if (m_shell) {
m_shell.ResolveExecutableLocation();
m_flags.Set(lldb::eLaunchFlagLaunchInShell);
} else
m_flags.Clear(lldb::eLaunchFlagLaunchInShell);
}
void ProcessLaunchInfo::SetLaunchInSeparateProcessGroup(bool separate) {
if (separate)
m_flags.Set(lldb::eLaunchFlagLaunchInSeparateProcessGroup);
else
m_flags.Clear(lldb::eLaunchFlagLaunchInSeparateProcessGroup);
}
void ProcessLaunchInfo::SetShellExpandArguments(bool expand) {
if (expand)
m_flags.Set(lldb::eLaunchFlagShellExpandArguments);
else
m_flags.Clear(lldb::eLaunchFlagShellExpandArguments);
}
void ProcessLaunchInfo::Clear() {
ProcessInfo::Clear();
m_working_dir.Clear();
m_plugin_name.clear();
m_shell.Clear();
m_flags.Clear();
m_file_actions.clear();
m_resume_count = 0;
m_listener_sp.reset();
m_hijack_listener_sp.reset();
}
void ProcessLaunchInfo::SetMonitorProcessCallback(
const Host::MonitorChildProcessCallback &callback, bool monitor_signals) {
m_monitor_callback = callback;
m_monitor_signals = monitor_signals;
}
bool ProcessLaunchInfo::MonitorProcess() const {
if (m_monitor_callback && ProcessIDIsValid()) {
Host::StartMonitoringChildProcess(m_monitor_callback, GetProcessID(),
m_monitor_signals);
return true;
}
return false;
}
void ProcessLaunchInfo::SetDetachOnError(bool enable) {
if (enable)
m_flags.Set(lldb::eLaunchFlagDetachOnError);
else
m_flags.Clear(lldb::eLaunchFlagDetachOnError);
}
void ProcessLaunchInfo::FinalizeFileActions(Target *target,
bool default_to_use_pty) {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS));
// If nothing for stdin or stdout or stderr was specified, then check the
// process for any default
// settings that were set with "settings set"
if (GetFileActionForFD(STDIN_FILENO) == nullptr ||
GetFileActionForFD(STDOUT_FILENO) == nullptr ||
GetFileActionForFD(STDERR_FILENO) == nullptr) {
if (log)
log->Printf("ProcessLaunchInfo::%s at least one of stdin/stdout/stderr "
"was not set, evaluating default handling",
__FUNCTION__);
if (m_flags.Test(eLaunchFlagLaunchInTTY)) {
// Do nothing, if we are launching in a remote terminal
// no file actions should be done at all.
return;
}
if (m_flags.Test(eLaunchFlagDisableSTDIO)) {
if (log)
log->Printf("ProcessLaunchInfo::%s eLaunchFlagDisableSTDIO set, adding "
"suppression action for stdin, stdout and stderr",
__FUNCTION__);
AppendSuppressFileAction(STDIN_FILENO, true, false);
AppendSuppressFileAction(STDOUT_FILENO, false, true);
AppendSuppressFileAction(STDERR_FILENO, false, true);
} else {
// Check for any values that might have gotten set with any of:
// (lldb) settings set target.input-path
// (lldb) settings set target.output-path
// (lldb) settings set target.error-path
FileSpec in_file_spec;
FileSpec out_file_spec;
FileSpec err_file_spec;
if (target) {
// Only override with the target settings if we don't already have
// an action for in, out or error
if (GetFileActionForFD(STDIN_FILENO) == nullptr)
in_file_spec = target->GetStandardInputPath();
if (GetFileActionForFD(STDOUT_FILENO) == nullptr)
out_file_spec = target->GetStandardOutputPath();
if (GetFileActionForFD(STDERR_FILENO) == nullptr)
err_file_spec = target->GetStandardErrorPath();
}
if (log)
log->Printf("ProcessLaunchInfo::%s target stdin='%s', target "
"stdout='%s', stderr='%s'",
__FUNCTION__,
in_file_spec ? in_file_spec.GetCString() : "<null>",
out_file_spec ? out_file_spec.GetCString() : "<null>",
err_file_spec ? err_file_spec.GetCString() : "<null>");
if (in_file_spec) {
AppendOpenFileAction(STDIN_FILENO, in_file_spec, true, false);
if (log)
log->Printf(
"ProcessLaunchInfo::%s appended stdin open file action for %s",
__FUNCTION__, in_file_spec.GetCString());
}
if (out_file_spec) {
AppendOpenFileAction(STDOUT_FILENO, out_file_spec, false, true);
if (log)
log->Printf(
"ProcessLaunchInfo::%s appended stdout open file action for %s",
__FUNCTION__, out_file_spec.GetCString());
}
if (err_file_spec) {
AppendOpenFileAction(STDERR_FILENO, err_file_spec, false, true);
if (log)
log->Printf(
"ProcessLaunchInfo::%s appended stderr open file action for %s",
__FUNCTION__, err_file_spec.GetCString());
}
if (default_to_use_pty &&
(!in_file_spec || !out_file_spec || !err_file_spec)) {
if (log)
log->Printf("ProcessLaunchInfo::%s default_to_use_pty is set, and at "
"least one stdin/stderr/stdout is unset, so generating a "
"pty to use for it",
__FUNCTION__);
int open_flags = O_RDWR | O_NOCTTY;
#if !defined(_WIN32)
// We really shouldn't be specifying platform specific flags
// that are intended for a system call in generic code. But
// this will have to do for now.
open_flags |= O_CLOEXEC;
#endif
if (m_pty->OpenFirstAvailableMaster(open_flags, nullptr, 0)) {
const FileSpec slave_file_spec{m_pty->GetSlaveName(nullptr, 0),
false};
// Only use the slave tty if we don't have anything specified for
// input and don't have an action for stdin
if (!in_file_spec && GetFileActionForFD(STDIN_FILENO) == nullptr) {
AppendOpenFileAction(STDIN_FILENO, slave_file_spec, true, false);
}
// Only use the slave tty if we don't have anything specified for
// output and don't have an action for stdout
if (!out_file_spec && GetFileActionForFD(STDOUT_FILENO) == nullptr) {
AppendOpenFileAction(STDOUT_FILENO, slave_file_spec, false, true);
}
// Only use the slave tty if we don't have anything specified for
// error and don't have an action for stderr
if (!err_file_spec && GetFileActionForFD(STDERR_FILENO) == nullptr) {
AppendOpenFileAction(STDERR_FILENO, slave_file_spec, false, true);
}
}
}
}
}
}
bool ProcessLaunchInfo::ConvertArgumentsForLaunchingInShell(
Error &error, bool localhost, bool will_debug,
bool first_arg_is_full_shell_command, int32_t num_resumes) {
error.Clear();
if (GetFlags().Test(eLaunchFlagLaunchInShell)) {
if (m_shell) {
std::string shell_executable = m_shell.GetPath();
const char **argv = GetArguments().GetConstArgumentVector();
if (argv == nullptr || argv[0] == nullptr)
return false;
Args shell_arguments;
std::string safe_arg;
shell_arguments.AppendArgument(shell_executable);
const llvm::Triple &triple = GetArchitecture().GetTriple();
if (triple.getOS() == llvm::Triple::Win32 &&
!triple.isWindowsCygwinEnvironment())
shell_arguments.AppendArgument(llvm::StringRef("/C"));
else
shell_arguments.AppendArgument(llvm::StringRef("-c"));
StreamString shell_command;
if (will_debug) {
// Add a modified PATH environment variable in case argv[0]
// is a relative path.
const char *argv0 = argv[0];
FileSpec arg_spec(argv0, false);
if (arg_spec.IsRelative()) {
// We have a relative path to our executable which may not work if
// we just try to run "a.out" (without it being converted to
// "./a.out")
FileSpec working_dir = GetWorkingDirectory();
// Be sure to put quotes around PATH's value in case any paths have
// spaces...
std::string new_path("PATH=\"");
const size_t empty_path_len = new_path.size();
if (working_dir) {
new_path += working_dir.GetPath();
} else {
llvm::SmallString<64> cwd;
if (! llvm::sys::fs::current_path(cwd))
new_path += cwd;
}
std::string curr_path;
if (HostInfo::GetEnvironmentVar("PATH", curr_path)) {
if (new_path.size() > empty_path_len)
new_path += ':';
new_path += curr_path;
}
new_path += "\" ";
shell_command.PutCString(new_path);
}
if (triple.getOS() != llvm::Triple::Win32 ||
triple.isWindowsCygwinEnvironment())
shell_command.PutCString("exec");
// Only Apple supports /usr/bin/arch being able to specify the
// architecture
if (GetArchitecture().IsValid() && // Valid architecture
GetArchitecture().GetTriple().getVendor() ==
llvm::Triple::Apple && // Apple only
GetArchitecture().GetCore() !=
ArchSpec::eCore_x86_64_x86_64h) // Don't do this for x86_64h
{
shell_command.Printf(" /usr/bin/arch -arch %s",
GetArchitecture().GetArchitectureName());
// Set the resume count to 2:
// 1 - stop in shell
// 2 - stop in /usr/bin/arch
// 3 - then we will stop in our program
SetResumeCount(num_resumes + 1);
} else {
// Set the resume count to 1:
// 1 - stop in shell
// 2 - then we will stop in our program
SetResumeCount(num_resumes);
}
}
if (first_arg_is_full_shell_command) {
// There should only be one argument that is the shell command itself to
// be used as is
if (argv[0] && !argv[1])
shell_command.Printf("%s", argv[0]);
else
return false;
} else {
for (size_t i = 0; argv[i] != nullptr; ++i) {
const char *arg =
Args::GetShellSafeArgument(m_shell, argv[i], safe_arg);
shell_command.Printf(" %s", arg);
}
}
shell_arguments.AppendArgument(shell_command.GetString());
m_executable = m_shell;
m_arguments = shell_arguments;
return true;
} else {
error.SetErrorString("invalid shell path");
}
} else {
error.SetErrorString("not launching in shell");
}
return false;
}
ListenerSP ProcessLaunchInfo::GetListenerForProcess(Debugger &debugger) {
if (m_listener_sp)
return m_listener_sp;
else
return debugger.GetListener();
}
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