bool DoExecute(Args &args, CommandReturnObject &result) override {
if (args.empty()) {
result.AppendErrorWithFormat(
"%s takes a log channel and one or more log types.\n",
m_cmd_name.c_str());
return false;
}
Log::Callbacks log_callbacks;
const std::string channel = args.GetArgumentAtIndex(0);
args.Shift(); // Shift off the channel
if (Log::GetLogChannelCallbacks(ConstString(channel), log_callbacks)) {
log_callbacks.disable(args.GetConstArgumentVector(),
&result.GetErrorStream());
result.SetStatus(eReturnStatusSuccessFinishNoResult);
} else if (channel == "all") {
Log::DisableAllLogChannels(&result.GetErrorStream());
} else {
LogChannelSP log_channel_sp(LogChannel::FindPlugin(channel.data()));
if (log_channel_sp) {
log_channel_sp->Disable(args.GetConstArgumentVector(),
&result.GetErrorStream());
result.SetStatus(eReturnStatusSuccessFinishNoResult);
} else
result.AppendErrorWithFormat("Invalid log channel '%s'.\n",
channel.data());
}
return result.Succeeded();
}
virtual bool
DoExecute (Args& args,
CommandReturnObject &result)
{
if (args.GetArgumentCount() < 2)
{
result.AppendErrorWithFormat("%s takes a log channel and one or more log types.\n", m_cmd_name.c_str());
}
else
{
std::string channel(args.GetArgumentAtIndex(0));
args.Shift (); // Shift off the channel
char log_file[PATH_MAX];
if (m_options.log_file)
m_options.log_file.GetPath(log_file, sizeof(log_file));
else
log_file[0] = '\0';
bool success = m_interpreter.GetDebugger().EnableLog (channel.c_str(),
args.GetConstArgumentVector(),
log_file,
m_options.log_options,
result.GetErrorStream());
if (success)
result.SetStatus (eReturnStatusSuccessFinishNoResult);
else
result.SetStatus (eReturnStatusFailed);
}
return result.Succeeded();
}
HostProcess
ProcessLauncherAndroid::LaunchProcess(const ProcessLaunchInfo &launch_info, Error &error)
{
// TODO: Handle other launch parameters specified in launc_info
char exe_path[PATH_MAX];
launch_info.GetExecutableFile().GetPath(exe_path, sizeof(exe_path));
lldb::pid_t pid = ::fork();
if (pid == static_cast<lldb::pid_t>(-1))
{
// Fork failed
error.SetErrorStringWithFormat("Fork failed with error message: %s", strerror(errno));
return HostProcess(LLDB_INVALID_PROCESS_ID);
}
else if (pid == 0)
{
if (const lldb_private::FileAction *file_action = launch_info.GetFileActionForFD(STDIN_FILENO)) {
const char* path = file_action->GetPath();
if (path && ::strlen(path))
if (!DupDescriptor(path, STDIN_FILENO, O_RDONLY))
exit(-1);
}
if (const lldb_private::FileAction *file_action = launch_info.GetFileActionForFD(STDOUT_FILENO)) {
const char* path = file_action->GetPath();
if (path && ::strlen(path))
if (!DupDescriptor(path, STDOUT_FILENO, O_WRONLY | O_CREAT | O_TRUNC))
exit(-1);
}
if (const lldb_private::FileAction *file_action = launch_info.GetFileActionForFD(STDERR_FILENO)) {
const char* path = file_action->GetPath();
if (path && ::strlen(path))
if (!DupDescriptor(path, STDERR_FILENO, O_WRONLY | O_CREAT | O_TRUNC))
exit(-1);
}
// Child process
const char **argv = launch_info.GetArguments().GetConstArgumentVector();
Args env = launch_info.GetEnvironmentEntries();
FixupEnvironment(env);
const char **envp = env.GetConstArgumentVector();
const char *working_dir = launch_info.GetWorkingDirectory();
if (working_dir != nullptr && working_dir[0])
{
if (::chdir(working_dir) != 0)
exit(-1);
}
execve(argv[0],
const_cast<char *const *>(argv),
const_cast<char *const *>(envp));
exit(-1);
}
return HostProcess(pid);
}
// If there is no PATH variable specified inside the environment then set the path to /system/bin.
// It is required because the default path used by execve() is wrong on android.
static void
FixupEnvironment(Args& env)
{
static const char* path = "PATH=";
static const int path_len = ::strlen(path);
for (const char** args = env.GetConstArgumentVector(); *args; ++args)
if (::strncmp(path, *args, path_len) == 0)
return;
env.AppendArgument("PATH=/system/bin");
}
static void LLVM_ATTRIBUTE_NORETURN ChildFunc(int error_fd,
const ProcessLaunchInfo &info) {
// First, make sure we disable all logging. If we are logging to stdout, our
// logs can be
// mistaken for inferior output.
Log::DisableAllLogChannels(nullptr);
// Do not inherit setgid powers.
if (setgid(getgid()) != 0)
ExitWithError(error_fd, "setgid");
if (info.GetFlags().Test(eLaunchFlagLaunchInSeparateProcessGroup)) {
if (setpgid(0, 0) != 0)
ExitWithError(error_fd, "setpgid");
}
for (size_t i = 0; i < info.GetNumFileActions(); ++i) {
const FileAction &action = *info.GetFileActionAtIndex(i);
switch (action.GetAction()) {
case FileAction::eFileActionClose:
if (close(action.GetFD()) != 0)
ExitWithError(error_fd, "close");
break;
case FileAction::eFileActionDuplicate:
if (dup2(action.GetFD(), action.GetActionArgument()) == -1)
ExitWithError(error_fd, "dup2");
break;
case FileAction::eFileActionOpen:
DupDescriptor(error_fd, action.GetFileSpec(), action.GetFD(),
action.GetActionArgument());
break;
case FileAction::eFileActionNone:
break;
}
}
const char **argv = info.GetArguments().GetConstArgumentVector();
// Change working directory
if (info.GetWorkingDirectory() &&
0 != ::chdir(info.GetWorkingDirectory().GetCString()))
ExitWithError(error_fd, "chdir");
// Disable ASLR if requested.
if (info.GetFlags().Test(lldb::eLaunchFlagDisableASLR)) {
const unsigned long personality_get_current = 0xffffffff;
int value = personality(personality_get_current);
if (value == -1)
ExitWithError(error_fd, "personality get");
value = personality(ADDR_NO_RANDOMIZE | value);
if (value == -1)
ExitWithError(error_fd, "personality set");
}
Args env = info.GetEnvironmentEntries();
FixupEnvironment(env);
const char **envp = env.GetConstArgumentVector();
// Clear the signal mask to prevent the child from being affected by
// any masking done by the parent.
sigset_t set;
if (sigemptyset(&set) != 0 ||
pthread_sigmask(SIG_SETMASK, &set, nullptr) != 0)
ExitWithError(error_fd, "pthread_sigmask");
if (info.GetFlags().Test(eLaunchFlagDebug)) {
// HACK:
// Close everything besides stdin, stdout, and stderr that has no file
// action to avoid leaking. Only do this when debugging, as elsewhere we
// actually rely on
// passing open descriptors to child processes.
for (int fd = 3; fd < sysconf(_SC_OPEN_MAX); ++fd)
if (!info.GetFileActionForFD(fd) && fd != error_fd)
close(fd);
// Start tracing this child that is about to exec.
if (ptrace(PTRACE_TRACEME, 0, nullptr, nullptr) == -1)
ExitWithError(error_fd, "ptrace");
}
// Execute. We should never return...
execve(argv[0], const_cast<char *const *>(argv),
const_cast<char *const *>(envp));
if (errno == ETXTBSY) {
// On android M and earlier we can get this error because the adb deamon can
// hold a write
// handle on the executable even after it has finished uploading it. This
// state lasts
// only a short time and happens only when there are many concurrent adb
// commands being
// issued, such as when running the test suite. (The file remains open when
// someone does
// an "adb shell" command in the fork() child before it has had a chance to
// exec.) Since
// this state should clear up quickly, wait a while and then give it one
// more go.
usleep(50000);
execve(argv[0], const_cast<char *const *>(argv),
const_cast<char *const *>(envp));
}
// ...unless exec fails. In which case we definitely need to end the child
// here.
ExitWithError(error_fd, "execve");
}
