#
304188 |
|
15-Aug-2016 |
jhb |
MFC 302900,302902,302921,303461,304009: Add a mask of optional ptrace() events.
302900: Add a test for user signal delivery.
This test verifies we get the correct ptrace event details when a signal is posted to a traced process from userland.
302902: Add a mask of optional ptrace() events.
ptrace() now stores a mask of optional events in p_ptevents. Currently this mask is a single integer, but it can be expanded into an array of integers in the future.
Two new ptrace requests can be used to manipulate the event mask: PT_GET_EVENT_MASK fetches the current event mask and PT_SET_EVENT_MASK sets the current event mask.
The current set of events include: - PTRACE_EXEC: trace calls to execve(). - PTRACE_SCE: trace system call entries. - PTRACE_SCX: trace syscam call exits. - PTRACE_FORK: trace forks and auto-attach to new child processes. - PTRACE_LWP: trace LWP events.
The S_PT_SCX and S_PT_SCE events in the procfs p_stops flags have been replaced by PTRACE_SCE and PTRACE_SCX. PTRACE_FORK replaces P_FOLLOW_FORK and PTRACE_LWP replaces P2_LWP_EVENTS.
The PT_FOLLOW_FORK and PT_LWP_EVENTS ptrace requests remain for compatibility but now simply toggle corresponding flags in the event mask.
While here, document that PT_SYSCALL, PT_TO_SCE, and PT_TO_SCX both modify the event mask and continue the traced process.
302921: Rename PTRACE_SYSCALL to LINUX_PTRACE_SYSCALL.
303461: Note that not all optional ptrace events use SIGTRAP.
New child processes attached due to PTRACE_FORK use SIGSTOP instead of SIGTRAP. All other ptrace events use SIGTRAP.
304009: Remove description of P_FOLLOWFORK as this flag was removed.
|
#
293575 |
|
09-Jan-2016 |
dchagin |
MFC r283474:
Rework signal code to allow using it by other modules, like linprocfs:
1. Linux sigset always 64 bit on all platforms. In order to move Linux sigset code to the linux_common module define it as 64 bit int. Move Linux sigset manipulation routines to the MI path.
2. Move Linux signal number definitions to the MI path. In general, they are the same on all platforms except for a few signals.
3. Map Linux RT signals to the FreeBSD RT signals and hide signal conversion tables to avoid conversion errors.
4. Emulate Linux SIGPWR signal via FreeBSD SIGRTMIN signal which is outside of allowed on Linux signal numbers.
PR: 197216
|