Florent Revest 7b15523a98 bpf: Add a bpf_snprintf helper ... The implementation takes inspiration from the existing bpf_trace_printk helper but there are a few differences: To allow for a large number of format-specifiers, parameters are provided in an array, like in bpf_seq_printf. Because the output string takes two arguments and the array of parameters also takes two arguments, the format string needs to fit in one argument. Thankfully, ARG_PTR_TO_CONST_STR is guaranteed to point to a zero-terminated read-only map so we don't need a format string length arg. Because the format-string is known at verification time, we also do a first pass of format string validation in the verifier logic. This makes debugging easier. Signed-off-by: Florent Revest <revest@chromium.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210419155243.1632274-4-revest@chromium.org		2021-04-19 15:27:36 -07:00
..
blktrace.c	block-5.12-2021-02-27	2021-02-28 11:23:38 -08:00
bpf_trace.c	bpf: Add a bpf_snprintf helper	2021-04-19 15:27:36 -07:00
bpf_trace.h	bpf: Use dedicated bpf_trace_printk event instead of trace_printk()	2020-07-13 16:55:49 -07:00
error_report-traces.c	tracing: add error_report_end trace point	2021-02-26 09:41:02 -08:00
fgraph.c	fgraph: Initialize tracing_graph_pause at task creation	2021-01-29 15:07:32 -05:00
ftrace_internal.h	x86/ftrace: Have ftrace trampolines turn read-only at the end of system boot up	2020-05-12 18:24:34 -04:00
ftrace.c	ftrace: Fix modify_ftrace_direct.	2021-03-17 00:43:12 +01:00
Kconfig	tracing: Fix help text of TRACEPOINT_BENCHMARK in Kconfig	2021-03-04 09:45:17 -05:00
kprobe_event_gen_test.c	tracing: Add kprobe event command generation test module	2020-01-30 09:46:28 -05:00
Makefile	tracing: add error_report_end trace point	2021-02-26 09:41:02 -08:00
power-traces.c
preemptirq_delay_test.c	kernel: trace: preemptirq_delay_test: add cpu affinity	2021-02-02 17:02:07 -05:00
ring_buffer_benchmark.c	sched,tracing: Convert to sched_set_fifo()	2020-07-29 11:43:53 +02:00
ring_buffer.c	ring-buffer: Add a little more information and a WARN when time stamp going backwards is detected	2021-03-04 09:45:17 -05:00
rpm-traces.c
synth_event_gen_test.c	tracing: Remove the useless value assignment in test_create_synth_event()	2020-11-13 12:19:52 -05:00
trace_benchmark.c	tracing: Fix some typos in comments	2020-11-10 20:39:40 -05:00
trace_benchmark.h
trace_boot.c	tracing: Disable ftrace selftests when any tracer is running	2020-12-14 12:05:03 -05:00
trace_branch.c	tracing: Merge irqflags + preempt counter.	2021-02-02 17:02:06 -05:00
trace_clock.c
trace_dynevent.c	tracing/dynevent: Delegate parsing to create function	2021-02-09 12:52:15 -05:00
trace_dynevent.h	tracing/dynevent: Delegate parsing to create function	2021-02-09 12:52:15 -05:00
trace_entries.h	tracing: Fix some typos in comments	2020-11-10 20:39:40 -05:00
trace_event_perf.c	tracing: Merge irqflags + preempt counter.	2021-02-02 17:02:06 -05:00
trace_events_filter_test.h
trace_events_filter.c	tracing: Clean up after filter logic rewriting	2020-11-16 12:32:34 -05:00
trace_events_hist.c	tracing: Fix some typos in comments	2020-11-10 20:39:40 -05:00
trace_events_inject.c	tracing: Merge irqflags + preempt counter.	2021-02-02 17:02:06 -05:00
trace_events_synth.c	tracing: Fix memory leak in __create_synth_event()	2021-03-04 09:45:57 -05:00
trace_events_trigger.c	tracing: Fix event trigger to accept redundant spaces	2020-06-23 21:51:40 -04:00
trace_events.c	Tracing updates for 5.12	2021-02-22 14:07:15 -08:00
trace_export.c	tracing: Fix some typos in comments	2020-11-10 20:39:40 -05:00
trace_functions_graph.c	tracing: Merge irqflags + preempt counter.	2021-02-02 17:02:06 -05:00
trace_functions.c	tracing: Merge irqflags + preempt counter.	2021-02-02 17:02:06 -05:00
trace_hwlat.c	tracing: Merge irqflags + preempt counter.	2021-02-02 17:02:06 -05:00
trace_irqsoff.c	tracing: Merge irqflags + preempt counter.	2021-02-02 17:02:06 -05:00
trace_kdb.c	tracing: Rename trace_buffer to array_buffer	2020-01-13 13:19:38 -05:00
trace_kprobe_selftest.c
trace_kprobe_selftest.h
trace_kprobe.c	Modules updates for v5.12	2021-02-23 10:15:33 -08:00
trace_mmiotrace.c	tracing: Remove definition of DEBUG in trace_mmiotrace.c	2021-02-02 17:02:07 -05:00
trace_nop.c
trace_output.c	tracing: Show real address for trace event arguments	2021-02-11 16:31:57 -05:00
trace_output.h	ftrace: Add recording of functions that caused recursion	2020-11-06 08:42:26 -05:00
trace_preemptirq.c	lockdep: fix order in trace_hardirqs_off_caller()	2020-09-14 10:08:07 +02:00
trace_printk.c	Updates for tracing and bootconfig:	2020-10-15 15:51:28 -07:00
trace_probe_tmpl.h	tracing/probe: Support user-space dereference	2019-05-25 23:04:42 -04:00
trace_probe.c	tracing/dynevent: Delegate parsing to create function	2021-02-09 12:52:15 -05:00
trace_probe.h	tracing/dynevent: Delegate parsing to create function	2021-02-09 12:52:15 -05:00
trace_recursion_record.c	ftrace: Add recording of functions that caused recursion	2020-11-06 08:42:26 -05:00
trace_sched_switch.c	tracing: Fix sched switch start/stop refcount racy updates	2020-01-30 09:46:10 -05:00
trace_sched_wakeup.c	tracing: Merge irqflags + preempt counter.	2021-02-02 17:02:06 -05:00
trace_selftest_dynamic.c
trace_selftest.c	tracing: Disable ftrace selftests when any tracer is running	2020-12-14 12:05:03 -05:00
trace_seq.c	tracing: Remove unused TRACE_SEQ_BUF_USED	2020-01-21 18:39:54 -05:00
trace_stack.c	ftrace: Have the callbacks receive a struct ftrace_regs instead of pt_regs	2020-11-13 12:14:55 -05:00
trace_stat.c	tracing: make tracing_init_dentry() returns an integer instead of a d_entry pointer	2020-09-18 22:17:14 -04:00
trace_stat.h	tracing: Use generic type for comparator function	2019-11-14 13:15:11 -05:00
trace_synth.h	tracing: Add support for dynamic strings to synthetic events	2020-10-05 19:32:18 -04:00
trace_syscalls.c	tracing: Merge irqflags + preempt counter.	2021-02-02 17:02:06 -05:00
trace_uprobe.c	tracing/dynevent: Delegate parsing to create function	2021-02-09 12:52:15 -05:00
trace.c	tracing: Skip selftests if tracing is disabled	2021-03-04 09:51:25 -05:00
trace.h	tracing: Remove duplicate declaration from trace.h	2021-03-04 09:44:47 -05:00
tracing_map.c	tracing: Fix some typos in comments	2020-11-10 20:39:40 -05:00
tracing_map.h	tracing: Fix some typos in comments	2020-11-10 20:39:40 -05:00