rt-thread.git/components/lwp/lwp_pid.h, 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

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

sync smart & dfs (#8672)

2024-03-28T15:42:56Z

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

[smart] fixup of lwp recycling and mm varea (#8206)

2023-11-02T12:23:11Z

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

🎈 perf: perf rt_hw_interrupt_disable/enable (#8042)

2023-10-25T12:31:25Z

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

[smart] split out part of lwp_new() to lwp_create()

2023-10-11T00:48:06Z

Prev implementation of lwp_new() including the create of lwp object and the pid allocation. But not every lwp object need a pid. So this patch split out the business of lwp_new() to improve the maintainability. Signed-off-by: Shell

[component/lwp] support more feature of signal from IEEE Std 1003.1-2017 (#7828)

2023-07-19T16:02:41Z

Signed-off-by: Shell

sync branch rt-smart. (#6641)

2022-12-03T04:07:44Z

* Synchronize the code of the rt mart branch to the master branch. * TTY device * Add lwP code from rt-smart * Add vnode in DFS, but DFS will be re-write for rt-smart * There are three libcpu for rt-smart: * arm/cortex-a, arm/aarch64 * riscv64 Co-authored-by: Rbb666 Co-authored-by: zhkag