mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-10-26 10:57:38 +08:00
Linus Torvalds
3f942403bb
Pull probes updates from Masami Hiramatsu:
"Asynchronous optprobe optimizer and cleanups:
- Make optprobe optimizer multi-generational and asynchronous
Rework the optimizer as a state machine to avoid calling
time-consuming synchronize_rcu_tasks() while holding kprobe_mutex,
text_mutex, and cpus_read_lock(). Uses call_rcu_tasks() and a fixed
ring of generation slots instead, so locks are only held during the
brief instruction- patching window
- Use DEFINE_DEBUGFS_ATTRIBUTE for the kprobes enabled knob
Replace a hand-rolled debugfs read/write pair (dating from 2007)
with the proper DEFINE_DEBUGFS_ATTRIBUTE macro, removing dead code
and the stale XXX comment
Code quality and documentation cleanups:
- Add const qualifier to new_argv allocation type in trace_probe.c,
preparing for the type-aware kmalloc_obj allocator conversion
- Clarify btf_find_struct_member() container parameter
Rename the misleading @member_type parameter to @container_type and
add proper kernel-doc documentation for all parameters and return
values
Boot tracing test framework and testcases:
- Add a generic boot tracing test framework under
tools/testing/selftests/ftrace/boottime/
The test runner builds a minimal initramfs with busybox, boots
QEMU, and runs tracefs checker scripts, supporting bootconfig,
kernel command-line options, and multi-boot crash/reboot scenarios
- Add boot-time tracing testcases
Verify dynamic kprobe, synthetic events, eprobe, fprobe, tprobe,
and trace instance creation via bootconfig
- Add kernel cmdline tracing testcases
Verify ftrace, trace_event, trace_buf_size, trace_options,
trace_clock, and trace_instance kernel parameters
- Add persistent ring buffer testcases:
Verify memory reservation via reserve_mem= and trace data retention
across guest crash/reboot, as well as backup instance creation and
boot log preservation
- Change non-unique test symbol from name_show to init_once in
kprobe_non_uniq_symbol.tc for more reliable cross-architecture
testing"
* tag 'probes-v7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
ftrace/selftests: Change non-unique test symbol to init_once
tracing/probes: Clarify btf_find_struct_member() container parameter and add kernel-doc
kprobes: Make optprobe optimizer multi-generational and asynchronous
tracing/probes: Add const to new_argv allocation type
kprobes: use DEFINE_DEBUGFS_ATTRIBUTE for the enabled knob
selftests/ftrace: Add persistent ring buffer testcases
selftests/ftrace: Add kernel cmdline tracing testcases
selftests/ftrace: Add boot-time tracing testcases
selftests/ftrace: Add generic boot tracing test framework
32 lines
922 B
C
32 lines
922 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#include <linux/btf.h>
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enum {
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RETVAL_FMT_HEX = BIT(0),
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RETVAL_FMT_DEC = BIT(1),
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RETVAL_FMT_BOOL = BIT(2),
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RETVAL_FMT_TRUNC = BIT(3),
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RETVAL_FMT_BTF = BIT(4),
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RETVAL_FMT_UNSIGNED = BIT(5),
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};
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const struct btf_type *btf_find_func_proto(const char *func_name,
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struct btf **btf_p);
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const struct btf_param *btf_get_func_param(const struct btf_type *func_proto,
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s32 *nr);
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const struct btf_member *btf_find_struct_member(struct btf *btf,
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const struct btf_type *type,
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const char *member_name,
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u32 *anon_offset,
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const struct btf_type **container_type);
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#ifdef CONFIG_DEBUG_INFO_BTF
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void btf_trim_retval(unsigned long func, unsigned long *retval, bool *print_retval,
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int *fmt, bool hex);
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#else
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static inline void btf_trim_retval(unsigned long func, unsigned long *retval,
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bool *print_retval, int *fmt, bool hex)
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{
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}
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#endif
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