| 71 | } |
| 72 | |
| 73 | auto TaskManager::CheckPendingSignals() -> int { |
| 74 | auto* current = GetCurrentTask(); |
| 75 | if (!current || !current->aux) { |
| 76 | return 0; |
| 77 | } |
| 78 | |
| 79 | auto& signals = current->aux->signals; |
| 80 | if (!signals.HasDeliverableSignal()) { |
| 81 | return 0; |
| 82 | } |
| 83 | |
| 84 | int signum = signals.GetNextDeliverableSignal(); |
| 85 | if (signum == signal_number::kSigNone) { |
| 86 | return 0; |
| 87 | } |
| 88 | |
| 89 | signals.ClearPending(signum); |
| 90 | |
| 91 | klog::Debug("CheckPendingSignals: pid={} delivering signal {} ({})", |
| 92 | current->pid, signum, SignalState::GetSignalName(signum)); |
| 93 | |
| 94 | auto& action = signals.actions[signum]; |
| 95 | |
| 96 | // SIGKILL: 强制终止，无法捕获 |
| 97 | if (signum == signal_number::kSigKill) { |
| 98 | klog::Info("CheckPendingSignals: pid={} killed by SIGKILL", current->pid); |
| 99 | Exit(128 + signum); |
| 100 | __builtin_unreachable(); |
| 101 | } |
| 102 | |
| 103 | // SIGSTOP: 强制停止，无法捕获 |
| 104 | /// @todo 实现进程停止状态 (需要新的 FSM 状态 kStopped) |
| 105 | if (signum == signal_number::kSigStop || signum == signal_number::kSigTstp) { |
| 106 | klog::Info( |
| 107 | "CheckPendingSignals: pid={} received stop signal {} (not implemented)", |
| 108 | current->pid, SignalState::GetSignalName(signum)); |
| 109 | return signum; |
| 110 | } |
| 111 | |
| 112 | // SIGCONT: 继续（如果已停止） |
| 113 | if (signum == signal_number::kSigCont) { |
| 114 | klog::Debug("CheckPendingSignals: pid={} received SIGCONT", current->pid); |
| 115 | return signum; |
| 116 | } |
| 117 | |
| 118 | if (action.handler == kSigIgn) { |
| 119 | klog::Debug("CheckPendingSignals: pid={} ignored signal {}", current->pid, |
| 120 | SignalState::GetSignalName(signum)); |
| 121 | return signum; |
| 122 | } |
| 123 | |
| 124 | if (action.handler == kSigDfl) { |
| 125 | char default_action = GetDefaultSignalAction(signum); |
| 126 | switch (default_action) { |
| 127 | case 'T': |
| 128 | case 'C': |
| 129 | klog::Info( |
| 130 | "CheckPendingSignals: pid={} terminated by signal {} (default)", |
no test coverage detected