rt-thread.git/components/lwp/lwp_pid.c, branch copilot/bug-security-related-issue

lwp: fix pid leak on exec failure before task startup

2026-05-26T08:56:36Z

When msh tries to execute a non-ELF path, lwp_execve() may allocate a PID before lwp_load() fails. The old error path only dropped the LWP reference, leaving the PID tree entry pointing to a freed LWP. In an init-less boot flow, this can poison pid 1 after a failed command from msh. A later LWP launch may then treat the stale pid 1 entry as a valid parent LWP, resulting in invalid pgrp/session state and a job-control assertion during process exit. Add lwp_pid_rollback() for exec/spawn failures before the process becomes runnable. Unlike lwp_pid_put(), it always releases the PID lock and does not enter the "no more pid allocation" state when the PID tree becomes empty. Use the rollback helper in lwp_execve() failure paths after PID allocation. Signed-off-by: zhangyang

[components/lwp]add doxygen comment for lwp_pid. #10702

2025-09-19T10:18:26Z

[lwp]修正无法通过文件名查找pid的问题 (#9935)

2025-01-21T05:01:58Z

feat: add system reboot and process teardown support

2025-01-06T11:34:16Z

The patch introduces support for system reboot functionality and process teardown, allowing for a clean shutdown and unmounting of the root filesystem. This is necessary for ensuring a proper system shutdown process, especially when dealing with resource cleanup and ensuring that all processes have exited before system shutdown. Changes: - Added `lwp_teardown()` function to handle process cleanup and system teardown. - Introduced `lwp_pid_wait_for_empty()` to wait for process ID table emptiness before proceeding with shutdown. - Updated `dfs_mnt_unref()` to trigger callbacks when unmounting a filesystem. - Added new reboot types (`RB_AUTOBOOT`, `RB_POWER_OFF`) and implemented their corresponding actions, including cleanup of processes and unmounting root filesystem. - Extended `sys_reboot()` to handle reboot and power off types with appropriate callbacks for process and filesystem teardown. - Introduced callback mechanism for root filesystem unmount notifications. Signed-off-by: Shell

feat: support PID iteration

2025-01-06T11:34:16Z

This change introduces the `lwp_pid_for_each` function, which provides a convenient and thread-safe method for iterating over PIDs with a user- defined callback. This addition is necessary to support cases where operations must be performed on each PID in the balanced tree, enhancing flexibility and modularity for PID management. Changes: - Added `lwp_pid_for_each` function in `lwp_pid.c` to allow iteration over PIDs using a callback function and optional data parameter. - Defined a new internal `pid_foreach_param` structure to encapsulate the callback and data for the iteration. - Added `_before_cb` helper function for executing the callback on each PID node during AVL traversal. - Ensured thread safety by acquiring and releasing the PID lock around the AVL traversal within `lwp_pid_for_each`. - Updated `lwp_pid.h` with the `lwp_pid_for_each` function prototype and included `rtthread.h` for necessary types. Signed-off-by: Shell

[lwp]list_process can print tid (#8991)

2024-05-31T09:30:46Z

* list_process can print tid * fix-ci * update list_process * Update lwp_pid.c

[smart] update sched_setaffinity() to use thread(task) ID (#9004)

2024-05-28T22:53:22Z

Correct `sched_setaffinity()` to use the thread IDs (TIDs) instead of process IDs (PIDs). The previous implementation used PIDs, which caused issues since affinity settings need to be applied at the thread level. As the manual documented, the signature is: > int sched_setaffinity(pid_t pid, size_t cpusetsize, > const cpu_set_t *mask); Yes, it's tricky, the identification passing in is called **'PID'**. But when we talk about 'pid' from GNU libc, it's the **'task-id'**, aka, `thread->tid` known in kernel. Changes were made by updating the function signatures and logic in `lwp.h`, `lwp_pid.c`, and `lwp_syscall.c` to accept TIDs. Specifically, the `lwp_setaffinity` function and related internal functions now operate using thread IDs and adjust thread affinity settings accordingly Signed-off-by: Shell

[quality] fixup compiler warning (#8961)

2024-05-21T11:47:42Z

Signed-off-by: Shell

sync smart & dfs (#8672)

2024-03-28T15:42:56Z

Signed-off-by: xqyjlj Signed-off-by: Shell Co-authored-by: xqyjlj

🎯 Sync smart & scheduler codes (#8537)

2024-02-23T09:49:15Z

Signed-off-by: Shell Co-authored-by: xqyjlj