Mark Johnston 4f1b715c84 Fix a tracepoint lookup race in fasttrap_pid_probe(). ... fasttrap hooks the userspace breakpoint handler; the hook looks up the breakpoint address in a hash table of tracepoints. It is possible for the tracepoint to be removed by a different thread in between the breakpoint trap and the hash table lookup, in which case SIGTRAP gets delivered to the target process. Fix the problem by adding a per-process generation counter that gets incremented when a tracepoint belonging to that process is removed. Then, when a lookup fails, the trapping instruction is restarted if the thread's counter doesn't match that of the process. Reviewed by: cem MFC after: 2 weeks Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D19273		2019-02-21 22:54:17 +00:00
..
aarch64	DTrace aarch64: Avoid calling unwind_frame() in the probe context.	2018-05-12 15:35:26 +00:00
amd64	dtrace: fix userspace access on boxes with SMAP	2018-12-13 20:09:38 +00:00
arm	Rename assym.s to assym.inc	2018-03-20 17:58:51 +00:00
i386	Remove very old and unused signal information codes.	2018-03-27 20:57:51 +00:00
mips	Enable dtrace support for mips64 and the ERL kernel config	2017-09-06 03:19:52 +00:00
powerpc	powerpc/dtrace: Use explicit bit numbers to mask out PSL_EE	2018-10-21 02:08:57 +00:00
riscv	Add support for 'C'-compressed ISA extension to DTrace FBT provider.	2018-09-03 14:34:09 +00:00
x86	Sync the x86 dis_tables.c with upstream.	2017-02-03 03:22:47 +00:00
dtrace_anon.c
dtrace_cddl.h	Fix a tracepoint lookup race in fasttrap_pid_probe().	2019-02-21 22:54:17 +00:00
dtrace_debug.c	Fix a backwards comparison in the code to dump a DTrace debug buffer.	2017-03-13 18:43:00 +00:00
dtrace_hacks.c
dtrace_ioctl.c	Don't use pcpu_find() to determine if a CPU ID is valid.	2017-11-27 18:42:23 +00:00
dtrace_load.c	Fix a harmless LOR in dtrace_load().	2017-05-01 17:01:00 +00:00
dtrace_modevent.c
dtrace_sysctl.c	Add tunable to disable destructive dtrace	2016-11-23 22:50:20 +00:00
dtrace_test.c
dtrace_unload.c
dtrace_vtime.c