[GIT PULL] tracing: Updates for 5.16
From: Steven Rostedt
Date: Mon Nov 01 2021 - 17:55:54 EST
Linus,
Note, I'm pushing this early as these are my well tested patches and
there's some dependencies in here that I believe that Heiko needs for his
s390 tree and so does Gustavo for some of his work.
I have some more changes to the osnoise and timerlat tracing that I'm still
testing, and will hopefully post those later this week. Those are not
intrusive to other parts of the kernel as they only deal with osnoise and
timerlat which most people currently have disabled in their configs.
Also, this pull request will conflict with your tree against a fix I had
for trace recursions. I did the conflict resolution and pushed it to my
ftrace/conflicts branch if you want to reference it.
Tracing updates for 5.16:
- kprobes: Restructured stack unwinder to show properly on x86 when a stack
dump happens from a kretprobe callback.
- Fix to bootconfig parsing
- Have tracefs allow owner and group permissions by default (only denying
others). There's been pressure to allow non root to tracefs in a
controlled fashion, and using groups is probably the safest.
- Bootconfig memory management updates.
- Bootconfig clean up to have the tools directory be less dependent on
changes in the kernel tree.
- Allow perf to be traced by function tracer.
- Rewrite of function graph tracer to be a callback from the function tracer
instead of having its own trampoline (this change will happen on an arch
by arch basis, and currently only x86_64 implements it).
- Allow multiple direct trampolines (bpf hooks to functions) be batched
together in one synchronization.
- Allow histogram triggers to add variables that can perform calculations
against the event's fields.
- Use the linker to determine architecture callbacks from the ftrace
trampoline to allow for proper parameter prototypes and prevent warnings
from the compiler.
- Extend histogram triggers to key off of variables.
- Have trace recursion use bit magic to determine preempt context over if
branches.
- Have trace recursion disable preemption as all use cases do anyway.
- Added testing for verification of tracing utilities.
- Various small clean ups and fixes.
Please pull the latest trace-v5.16 tree, which can be found at:
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git
trace-v5.16
Tag SHA1: 4de9e3324159cf9be30835fd948f2b2876317d8e
Head SHA1: feea69ec121f067073868cebe0cb9d003e64ad80
Arnd Bergmann (1):
tracing: use %ps format string to print symbols
Carles Pey (1):
ftrace: Add unit test for removing trace function
Changbin Du (1):
tracing: in_irq() cleanup
Daniel Bristot de Oliveira (4):
trace/osnoise: Fix an ifdef comment
tracing/doc: Fix typos on the timerlat tracer documentation
trace/osnoise: Add migrate-disabled field to the osnoise header
trace/timerlat: Add migrate-disabled field to the timerlat header
Jiri Olsa (6):
x86/ftrace: Remove extra orig rax move
tracing: Add trampoline/graph selftest
ftrace: Add ftrace_add_rec_direct function
ftrace: Add multi direct register/unregister interface
ftrace: Add multi direct modify interface
ftrace/samples: Add multi direct interface test module
Josh Poimboeuf (3):
objtool: Add frame-pointer-specific function ignore
objtool: Ignore unwind hints for ignored functions
x86/kprobes: Add UNWIND_HINT_FUNC on kretprobe_trampoline()
Kalesh Singh (9):
tracing/cfi: Fix cmp_entries_* functions signature mismatch
tracing: Add support for creating hist trigger variables from literal
tracing: Add division and multiplication support for hist triggers
tracing: Fix operator precedence for hist triggers expression
tracing/histogram: Simplify handling of .sym-offset in expressions
tracing/histogram: Covert expr to const if both operands are constants
tracing/histogram: Optimize division by a power of 2
tracing/histogram: Document expression arithmetic and constants
tracing/histogram: Fix documentation inline emphasis warning
Masami Hiramatsu (39):
kprobes: treewide: Cleanup the error messages for kprobes
kprobes: Fix coding style issues
kprobes: Use IS_ENABLED() instead of kprobes_built_in()
kprobes: Add assertions for required lock
kprobes: treewide: Use 'kprobe_opcode_t *' for the code address in get_optimized_kprobe()
kprobes: Use bool type for functions which returns boolean value
ia64: kprobes: Fix to pass correct trampoline address to the handler
kprobes: treewide: Replace arch_deref_entry_point() with dereference_symbol_descriptor()
kprobes: treewide: Remove trampoline_address from kretprobe_trampoline_handler()
kprobes: treewide: Make it harder to refer kretprobe_trampoline directly
kprobes: Add kretprobe_find_ret_addr() for searching return address
ARC: Add instruction_pointer_set() API
ia64: Add instruction_pointer_set() API
arm: kprobes: Make space for instruction pointer on stack
kprobes: Enable stacktrace from pt_regs in kretprobe handler
x86/kprobes: Push a fake return address at kretprobe_trampoline
x86/unwind: Recover kretprobe trampoline entry
tracing: Show kretprobe unknown indicator only for kretprobe_trampoline
x86/kprobes: Fixup return address in generic trampoline handler
bootconfig: Allocate xbc_data inside xbc_init()
bootconfig: Add xbc_get_info() for the node information
tools/bootconfig: Run test script when build all
bootconfig: Rename xbc_destroy_all() to xbc_exit()
bootconfig: Split parse-tree part from xbc_init
bootconfig: Remove unused debug function
tools/bootconfig: Print all error message in stderr
bootconfig: Replace u16 and u32 with uint16_t and uint32_t
bootconfig: Cleanup dummy headers in tools/bootconfig
x86/unwind: Compile kretprobe fixup code only if CONFIG_KRETPROBES=y
arm64: kprobes: Record frame pointer with kretprobe instance
arm64: kprobes: Make a frame pointer on __kretprobe_trampoline
arm64: Recover kretprobe modified return address in stacktrace
ARM: clang: Do not rely on lr register for stacktrace
ARM: kprobes: Make a frame pointer on __kretprobe_trampoline
ARM: Recover kretprobe modified return address in stacktrace
lib/bootconfig: Make xbc_alloc_mem() and xbc_free_mem() as __init function
kprobes: Add a test case for stacktrace from kretprobe handler
lib/bootconfig: Fix the xbc_get_info kerneldoc
selftests/ftrace: Stop tracing while reading the trace file by default
Mathieu Desnoyers (1):
tracing: Fix missing trace_boot_init_histograms kstrdup NULL checks
Punit Agrawal (5):
kprobes: Do not use local variable when creating debugfs file
kprobes: Use helper to parse boolean input from userspace
kprobe: Simplify prepare_kprobe() by dropping redundant version
csky: ftrace: Drop duplicate implementation of arch_check_ftrace_location()
kprobes: Make arch_check_ftrace_location static
Robin H. Johnson (2):
tracing: Show size of requested perf buffer
tracing: Increase PERF_MAX_TRACE_SIZE to handle Sentinel1 and docker together
Song Liu (1):
perf/core: allow ftrace for functions in kernel/event/core.c
Steven Rostedt (VMware) (16):
tracing: Place trace_pid_list logic into abstract functions
tracing: Create a sparse bitmask for pid filtering
tracing: Initialize upper and lower vars in pid_list_refill_irq()
tracefs: Have tracefs directories not set OTH permission bits by default
tracing: Disable "other" permission bits in the tracefs files
tracing: Use linker magic instead of recasting ftrace_ops_list_func()
tracing: Reuse logic from perf's get_recursion_context()
tracing/perf: Add interrupt_context_level() helper
x86/ftrace: Remove fault protection code in prepare_ftrace_return
ftrace/x86_64: Have function graph tracer depend on DYNAMIC_FTRACE
x86/ftrace: Make function graph use ftrace directly
tracing: Fix selftest config check for function graph start up test
ftrace/direct: Do not disable when switching direct callers
tracing: Explain the trace recursion transition bit better
ftrace/sh: Add arch_ftrace_ops_list_func stub to have compressed image still link
bootconfig: Initialize ret in xbc_parse_tree()
Sven Schnelle (1):
kprobes: convert tests to kunit
Tiezhu Yang (4):
samples/kretprobes: Fix return value if register_kretprobe() failed
docs, kprobes: Remove invalid URL and add new reference
test_kprobes: Move it from kernel/ to lib/
MAINTAINERS: Update KPROBES and TRACING entries
Viktor Rosendahl (1):
tools/latency-collector: Use correct size when writing queue_full_warning
Wang ShaoBo (1):
tracing/hwlat: Make some internal symbols static
Weizhao Ouyang (1):
ftrace: Cleanup ftrace_dyn_arch_init()
chongjiapeng (1):
ftrace: Make ftrace_profile_pages_init static
kernel test robot (1):
tracing/histogram: Fix semicolon.cocci warnings
王贇 (2):
ftrace: disable preemption when recursion locked
ftrace: do CPU checking after preemption disabled
----
Documentation/trace/histogram.rst | 14 +
Documentation/trace/kprobes.rst | 2 +-
Documentation/trace/timerlat-tracer.rst | 24 +-
MAINTAINERS | 5 +-
arch/Kconfig | 8 +
arch/arc/include/asm/kprobes.h | 2 +-
arch/arc/include/asm/ptrace.h | 5 +
arch/arc/kernel/kprobes.c | 13 +-
arch/arm/Kconfig | 1 +
arch/arm/include/asm/stacktrace.h | 9 +
arch/arm/kernel/ftrace.c | 5 -
arch/arm/kernel/return_address.c | 4 +
arch/arm/kernel/stacktrace.c | 17 +-
arch/arm/probes/kprobes/core.c | 43 +-
arch/arm/probes/kprobes/opt-arm.c | 7 +-
arch/arm64/Kconfig | 1 +
arch/arm64/include/asm/kprobes.h | 2 +-
arch/arm64/include/asm/stacktrace.h | 4 +
arch/arm64/kernel/ftrace.c | 5 -
arch/arm64/kernel/probes/kprobes.c | 12 +-
arch/arm64/kernel/probes/kprobes_trampoline.S | 8 +-
arch/arm64/kernel/stacktrace.c | 7 +
arch/csky/include/asm/kprobes.h | 2 +-
arch/csky/kernel/ftrace.c | 5 -
arch/csky/kernel/probes/ftrace.c | 9 -
arch/csky/kernel/probes/kprobes.c | 14 +-
arch/csky/kernel/probes/kprobes_trampoline.S | 4 +-
arch/ia64/include/asm/ptrace.h | 5 +
arch/ia64/kernel/ftrace.c | 6 -
arch/ia64/kernel/kprobes.c | 15 +-
arch/microblaze/kernel/ftrace.c | 5 -
arch/mips/kernel/kprobes.c | 26 +-
arch/nds32/kernel/ftrace.c | 5 -
arch/parisc/kernel/ftrace.c | 7 -
arch/parisc/kernel/kprobes.c | 6 +-
arch/powerpc/include/asm/kprobes.h | 2 +-
arch/powerpc/kernel/kprobes-ftrace.c | 2 -
arch/powerpc/kernel/kprobes.c | 29 +-
arch/powerpc/kernel/optprobes.c | 8 +-
arch/powerpc/kernel/stacktrace.c | 2 +-
arch/riscv/include/asm/kprobes.h | 2 +-
arch/riscv/kernel/ftrace.c | 5 -
arch/riscv/kernel/probes/ftrace.c | 2 -
arch/riscv/kernel/probes/kprobes.c | 15 +-
arch/riscv/kernel/probes/kprobes_trampoline.S | 4 +-
arch/s390/include/asm/kprobes.h | 2 +-
arch/s390/kernel/ftrace.c | 5 -
arch/s390/kernel/kprobes.c | 16 +-
arch/s390/kernel/stacktrace.c | 2 +-
arch/sh/boot/compressed/misc.c | 3 +
arch/sh/include/asm/kprobes.h | 2 +-
arch/sh/kernel/ftrace.c | 5 -
arch/sh/kernel/kprobes.c | 12 +-
arch/sparc/include/asm/kprobes.h | 2 +-
arch/sparc/kernel/ftrace.c | 5 -
arch/sparc/kernel/kprobes.c | 12 +-
arch/x86/Kconfig | 3 +-
arch/x86/include/asm/ftrace.h | 9 +-
arch/x86/include/asm/kprobes.h | 1 -
arch/x86/include/asm/unwind.h | 29 ++
arch/x86/include/asm/unwind_hints.h | 5 +
arch/x86/kernel/ftrace.c | 76 ++--
arch/x86/kernel/ftrace_64.S | 30 +-
arch/x86/kernel/kprobes/core.c | 71 +++-
arch/x86/kernel/kprobes/ftrace.c | 2 -
arch/x86/kernel/kprobes/opt.c | 6 +-
arch/x86/kernel/trace.c | 2 +-
arch/x86/kernel/unwind_frame.c | 3 +-
arch/x86/kernel/unwind_guess.c | 3 +-
arch/x86/kernel/unwind_orc.c | 21 +-
fs/tracefs/inode.c | 3 +-
include/asm-generic/vmlinux.lds.h | 10 +-
include/linux/bootconfig.h | 31 +-
include/linux/ftrace.h | 38 +-
include/linux/kprobes.h | 113 ++++--
include/linux/objtool.h | 12 +
include/linux/preempt.h | 21 +
include/linux/trace_events.h | 2 +-
include/linux/trace_recursion.h | 27 +-
init/main.c | 16 +-
kernel/Makefile | 1 -
kernel/events/Makefile | 5 -
kernel/events/internal.h | 7 +-
kernel/kprobes.c | 505 +++++++++++++-----------
kernel/livepatch/patch.c | 12 +-
kernel/test_kprobes.c | 313 ---------------
kernel/trace/Makefile | 1 +
kernel/trace/fgraph.c | 6 +-
kernel/trace/ftrace.c | 348 +++++++++++++---
kernel/trace/pid_list.c | 495 +++++++++++++++++++++++
kernel/trace/pid_list.h | 88 +++++
kernel/trace/ring_buffer.c | 9 +-
kernel/trace/trace.c | 151 +++----
kernel/trace/trace.h | 19 +-
kernel/trace/trace_boot.c | 4 +
kernel/trace/trace_dynevent.c | 2 +-
kernel/trace/trace_event_perf.c | 9 +-
kernel/trace/trace_events.c | 48 +--
kernel/trace/trace_events_hist.c | 415 +++++++++++++++----
kernel/trace/trace_events_synth.c | 4 +-
kernel/trace/trace_functions.c | 5 -
kernel/trace/trace_functions_graph.c | 4 +-
kernel/trace/trace_hwlat.c | 10 +-
kernel/trace/trace_kprobe.c | 10 +-
kernel/trace/trace_osnoise.c | 39 +-
kernel/trace/trace_output.c | 17 +-
kernel/trace/trace_printk.c | 2 +-
kernel/trace/trace_recursion_record.c | 4 +-
kernel/trace/trace_selftest.c | 92 ++++-
kernel/trace/trace_stack.c | 6 +-
kernel/trace/trace_stat.c | 6 +-
kernel/trace/trace_uprobe.c | 4 +-
kernel/trace/tracing_map.c | 40 +-
lib/Kconfig.debug | 3 +-
lib/Makefile | 1 +
lib/bootconfig.c | 231 ++++++-----
lib/error-inject.c | 3 +-
lib/test_kprobes.c | 371 +++++++++++++++++
samples/ftrace/Makefile | 1 +
samples/ftrace/ftrace-direct-multi.c | 52 +++
samples/kprobes/kretprobe_example.c | 2 +-
tools/bootconfig/Makefile | 4 +-
tools/bootconfig/include/linux/bootconfig.h | 45 ++-
tools/bootconfig/include/linux/bug.h | 12 -
tools/bootconfig/include/linux/ctype.h | 7 -
tools/bootconfig/include/linux/errno.h | 7 -
tools/bootconfig/include/linux/kernel.h | 18 -
tools/bootconfig/include/linux/memblock.h | 11 -
tools/bootconfig/include/linux/printk.h | 14 -
tools/bootconfig/include/linux/string.h | 32 --
tools/bootconfig/main.c | 32 +-
tools/include/linux/objtool.h | 12 +
tools/objtool/check.c | 2 +-
tools/testing/selftests/ftrace/ftracetest | 2 +-
tools/testing/selftests/ftrace/test.d/functions | 12 +
tools/tracing/latency/latency-collector.c | 2 +-
136 files changed, 3007 insertions(+), 1528 deletions(-)
delete mode 100644 kernel/test_kprobes.c
create mode 100644 kernel/trace/pid_list.c
create mode 100644 kernel/trace/pid_list.h
create mode 100644 lib/test_kprobes.c
create mode 100644 samples/ftrace/ftrace-direct-multi.c
delete mode 100644 tools/bootconfig/include/linux/bug.h
delete mode 100644 tools/bootconfig/include/linux/ctype.h
delete mode 100644 tools/bootconfig/include/linux/errno.h
delete mode 100644 tools/bootconfig/include/linux/kernel.h
delete mode 100644 tools/bootconfig/include/linux/memblock.h
delete mode 100644 tools/bootconfig/include/linux/printk.h
delete mode 100644 tools/bootconfig/include/linux/string.h
---------------------------