Yonghong Song cf5f5cea27 bpf: add support for sys_enter_* and sys_exit_* tracepoints ... Currently, bpf programs cannot be attached to sys_enter_* and sys_exit_* style tracepoints. The iovisor/bcc issue #748 (https://github.com/iovisor/bcc/issues/748) documents this issue. For example, if you try to attach a bpf program to tracepoints syscalls/sys_enter_newfstat, you will get the following error: # ./tools/trace.py t:syscalls:sys_enter_newfstat Ioctl(PERF_EVENT_IOC_SET_BPF): Invalid argument Failed to attach BPF to tracepoint The main reason is that syscalls/sys_enter_* and syscalls/sys_exit_* tracepoints are treated differently from other tracepoints and there is no bpf hook to it. This patch adds bpf support for these syscalls tracepoints by . permitting bpf attachment in ioctl PERF_EVENT_IOC_SET_BPF . calling bpf programs in perf_syscall_enter and perf_syscall_exit The legality of bpf program ctx access is also checked. Function trace_event_get_offsets returns correct max offset for each specific syscall tracepoint, which is compared against the maximum offset access in bpf program. Signed-off-by: Yonghong Song <yhs@fb.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>		2017-08-07 14:09:48 -07:00
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blktrace.c
bpf_trace.c	bpf: extend bpf_trace_printk to support %i	2017-07-03 02:22:52 -07:00
ftrace.c	trace: fix the errors caused by incompatible type of RCU variables	2017-07-20 09:27:29 -04:00
Kconfig	tracing: Rename update the enum_map file	2017-06-13 17:13:06 -04:00
Makefile
power-traces.c
ring_buffer.c	tracing/ring_buffer: Try harder to allocate	2017-07-19 08:22:12 -04:00
ring_buffer_benchmark.c
rpm-traces.c
trace.c	tracing: Fix kmemleak in instance_rmdir	2017-07-20 09:24:25 -04:00
trace.h	trace: fix the errors caused by incompatible type of RCU variables	2017-07-20 09:27:29 -04:00
trace_benchmark.c
trace_benchmark.h
trace_branch.c
trace_clock.c
trace_entries.h
trace_event_perf.c
trace_events.c	tracing: Add support for recording tgid of tasks	2017-06-27 13:30:28 -04:00
trace_events_filter.c
trace_events_filter_test.h
trace_events_hist.c
trace_events_trigger.c
trace_export.c
trace_functions.c	ftrace: Fix regression with module command in stack_trace_filter	2017-06-29 10:05:45 -04:00
trace_functions_graph.c
trace_hwlat.c
trace_irqsoff.c
trace_kdb.c
trace_kprobe.c	A few more minor updates:	2017-07-13 13:17:19 -07:00
trace_mmiotrace.c
trace_nop.c
trace_output.c	tracing: Add support for display of tgid in trace output	2017-06-27 13:30:28 -04:00
trace_output.h
trace_printk.c
trace_probe.c
trace_probe.h
trace_sched_switch.c	tracing: Add support for recording tgid of tasks	2017-06-27 13:30:28 -04:00
trace_sched_wakeup.c
trace_selftest.c
trace_selftest_dynamic.c
trace_seq.c
trace_stack.c	tracing: Do note expose stack_trace_filter without DYNAMIC_FTRACE	2017-07-11 19:21:04 -04:00
trace_stat.c
trace_stat.h
trace_syscalls.c	bpf: add support for sys_enter_* and sys_exit_* tracepoints	2017-08-07 14:09:48 -07:00
trace_uprobe.c
tracing_map.c
tracing_map.h