Yonghong Song 8482941f09 bpf: Add bpf_send_signal_thread() helper ... Commit 8b401f9ed2 ("bpf: implement bpf_send_signal() helper") added helper bpf_send_signal() which permits bpf program to send a signal to the current process. The signal may be delivered to any threads in the process. We found a use case where sending the signal to the current thread is more preferable. - A bpf program will collect the stack trace and then send signal to the user application. - The user application will add some thread specific information to the just collected stack trace for later analysis. If bpf_send_signal() is used, user application will need to check whether the thread receiving the signal matches the thread collecting the stack by checking thread id. If not, it will need to send signal to another thread through pthread_kill(). This patch proposed a new helper bpf_send_signal_thread(), which sends the signal to the thread corresponding to the current kernel task. This way, user space is guaranteed that bpf_program execution context and user space signal handling context are the same thread. Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200115035002.602336-1-yhs@fb.com		2020-01-15 11:44:51 -08:00
..
blktrace.c	cgroup: use cgrp->kn->id as the cgroup ID	2019-11-12 08:18:04 -08:00
bpf_trace.c	bpf: Add bpf_send_signal_thread() helper	2020-01-15 11:44:51 -08:00
fgraph.c	ftrace: Fix function_graph tracer interaction with BPF trampoline	2019-12-10 13:53:59 -05:00
ftrace_internal.h	treewide: Rename rcu_dereference_raw_notrace() to _check()	2019-08-01 14:16:21 -07:00
ftrace.c	This contains 3 changes:	2019-12-11 12:22:38 -08:00
Kconfig	Two fixes and one patch that was missed:	2019-12-04 19:13:52 -08:00
Makefile	tracing: Introduce trace event injection	2019-12-02 11:07:00 -05:00
power-traces.c
preemptirq_delay_test.c	preemptirq_delay_test: Add the burst feature and a sysfs trigger	2019-11-13 09:37:28 -05:00
ring_buffer_benchmark.c	ring-buffer: Fix typos in function ring_buffer_producer	2019-11-22 19:41:08 -05:00
ring_buffer.c	Fix up for "printk: Drop pr_warning definition"	2019-12-06 10:02:35 +01:00
rpm-traces.c
trace_benchmark.c	trace: Use pr_warn instead of pr_warning	2019-10-18 15:01:57 +02:00
trace_benchmark.h	tracing: Fix SPDX format headers to use C++ style comments	2018-08-16 19:08:06 -04:00
trace_branch.c	tracing: Use generic type for comparator function	2019-11-14 13:15:11 -05:00
trace_clock.c	tracing: Add SPDX License format tags to tracing files	2018-08-16 19:08:06 -04:00
trace_dynevent.c	tracing: Add tracing_check_open_get_tr()	2019-10-12 20:44:07 -04:00
trace_dynevent.h	tracing/dynevent: Pass extra arguments to match operation	2019-08-31 12:19:38 -04:00
trace_entries.h	tracing: Change the function format to display function names by perf	2019-02-11 14:53:43 -05:00
trace_event_perf.c	Merge branch 'perf/urgent' into perf/core, to pick up fixes	2019-10-28 12:38:26 +01:00
trace_events_filter_test.h	tracing: Fix SPDX format headers to use C++ style comments	2018-08-16 19:08:06 -04:00
trace_events_filter.c	tracing: Avoid memory leak in process_system_preds()	2019-12-19 18:24:17 -05:00
trace_events_hist.c	tracing: Fix endianness bug in histogram trigger	2019-12-21 16:08:59 -05:00
trace_events_inject.c	tracing: remove set but not used variable 'buffer'	2019-12-10 13:53:51 -05:00
trace_events_trigger.c	tracing: Add locked_down checks to the open calls of files created for tracefs	2019-10-12 20:48:06 -04:00
trace_events.c	tracing: Fix lock inversion in trace_event_enable_tgid_record()	2019-12-21 16:05:13 -05:00
trace_export.c	tracing: Make internal ftrace events static	2019-11-13 09:37:29 -05:00
trace_functions_graph.c	fgraph: Remove redundant ftrace_graph_notrace_addr() test	2019-07-30 21:50:03 -04:00
trace_functions.c	tracing: Update stack trace skipping for ORC unwinder	2018-01-23 15:57:00 -05:00
trace_hwlat.c	tracing/hwlat: Fix a few trivial nits	2019-11-14 13:15:11 -05:00
trace_irqsoff.c	The biggest change for this release is in the histogram code.	2019-03-11 17:01:32 -07:00
trace_kdb.c	tracing: Silence GCC 9 array bounds warning	2019-05-25 23:04:30 -04:00
trace_kprobe_selftest.c	selftest/ftrace: Move kprobe selftest function to separate compile unit	2018-07-30 18:41:04 -04:00
trace_kprobe_selftest.h	tracing: Fix SPDX format headers to use C++ style comments	2018-08-16 19:08:06 -04:00
trace_kprobe.c	tracing/kprobe: Check whether the non-suffixed symbol is notrace	2019-11-14 13:15:12 -05:00
trace_mmiotrace.c
trace_nop.c
trace_output.c	tracing: Use seq_buf_hex_dump() to dump buffers	2019-11-14 13:15:12 -05:00
trace_output.h	tracing: Fix SPDX format headers to use C++ style comments	2018-08-16 19:08:06 -04:00
trace_preemptirq.c	kprobes: Prohibit probing on hardirq tracers	2019-02-13 08:16:40 +01:00
trace_printk.c	tracing: Add locked_down checks to the open calls of files created for tracefs	2019-10-12 20:48:06 -04:00
trace_probe_tmpl.h	tracing/probe: Support user-space dereference	2019-05-25 23:04:42 -04:00
trace_probe.c	tracing/probe: Fix to check the difference of nr_args before adding probe	2019-09-28 17:07:53 -04:00
trace_probe.h	tracing/probe: Reject exactly same probe event	2019-09-19 11:09:16 -04:00
trace_sched_switch.c
trace_sched_wakeup.c	sched/core: Convert get_task_struct() to return the task	2019-07-25 15:51:54 +02:00
trace_selftest_dynamic.c	ftrace: Mark function tracer test functions noinline/noclone	2018-01-23 15:57:29 -05:00
trace_selftest.c	function_graph: Have selftest also emulate tr->reset() as it did with tr->init()	2019-04-21 19:46:56 -04:00
trace_seq.c	tracing: Use seq_buf_hex_dump() to dump buffers	2019-11-14 13:15:12 -05:00
trace_stack.c	tracing: Add locked_down checks to the open calls of files created for tracefs	2019-10-12 20:48:06 -04:00
trace_stat.c	tracing: Use generic type for comparator function	2019-11-14 13:15:11 -05:00
trace_stat.h	tracing: Use generic type for comparator function	2019-11-14 13:15:11 -05:00
trace_syscalls.c	tracing: Use xarray for syscall trace events	2019-11-22 19:47:41 -05:00
trace_uprobe.c	tracing: Add locked_down checks to the open calls of files created for tracefs	2019-10-12 20:48:06 -04:00
trace.c	tracing: Fix lock inversion in trace_event_enable_tgid_record()	2019-12-21 16:05:13 -05:00
trace.h	tracing: Introduce trace event injection	2019-12-02 11:07:00 -05:00
tracing_map.c	tracing: Have the histogram compare functions convert to u64 first	2019-12-19 18:26:00 -05:00
tracing_map.h	tracing: Fix SPDX format headers to use C++ style comments	2018-08-16 19:08:06 -04:00