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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-02-23 13:03:08 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-02-23 13:03:08 -0800 |
| commit | 2b79eb73e2c4b362a2a261b7b2f718385fb478e4 (patch) | |
| tree | 0cdfe6e0a9e363a1d69f7633b950332cca2ec9c9 /Documentation/trace | |
| parent | 0df82189bc42037678fa590a77ed0116f428c90d (diff) | |
| parent | c96abaec78f34366b3ddf1c6be52ca5c1241e15b (diff) | |
| download | linux-2b79eb73e2c4b362a2a261b7b2f718385fb478e4.tar.gz | |
Merge tag 'probes-v6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull kprobes updates from Masami Hiramatsu:
- Skip negative return code check for snprintf in eprobe
- Add recursive call test cases for kprobe unit test
- Add 'char' type to probe events to show it as the character instead
of value
- Update kselftest kprobe-event testcase to ignore '__pfx_' symbols
- Fix kselftest to check filter on eprobe event correctly
- Add filter on eprobe to the README file in tracefs
- Fix optprobes to check whether there is 'under unoptimizing' optprobe
when optimizing another kprobe correctly
- Fix optprobe to check whether there is 'under unoptimizing' optprobe
when fetching the original instruction correctly
- Fix optprobe to free 'forcibly unoptimized' optprobe correctly
* tag 'probes-v6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
tracing/eprobe: no need to check for negative ret value for snprintf
test_kprobes: Add recursed kprobe test case
tracing/probe: add a char type to show the character value of traced arguments
selftests/ftrace: Fix probepoint testcase to ignore __pfx_* symbols
selftests/ftrace: Fix eprobe syntax test case to check filter support
tracing/eprobe: Fix to add filter on eprobe description in README file
x86/kprobes: Fix arch_check_optimized_kprobe check within optimized_kprobe range
x86/kprobes: Fix __recover_optprobed_insn check optimizing logic
kprobes: Fix to handle forcibly unoptimized kprobes on freeing_list
Diffstat (limited to 'Documentation/trace')
| -rw-r--r-- | Documentation/trace/kprobetrace.rst | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/Documentation/trace/kprobetrace.rst b/Documentation/trace/kprobetrace.rst index 0d103074d3d2fa..651f9ab53f3ee9 100644 --- a/Documentation/trace/kprobetrace.rst +++ b/Documentation/trace/kprobetrace.rst @@ -58,7 +58,7 @@ Synopsis of kprobe_events NAME=FETCHARG : Set NAME as the argument name of FETCHARG. FETCHARG:TYPE : Set TYPE as the type of FETCHARG. Currently, basic types (u8/u16/u32/u64/s8/s16/s32/s64), hexadecimal types - (x8/x16/x32/x64), "string", "ustring", "symbol", "symstr" + (x8/x16/x32/x64), "char", "string", "ustring", "symbol", "symstr" and bitfield are supported. (\*1) only for the probe on function entry (offs == 0). @@ -82,6 +82,8 @@ Note that the array can be applied to memory type fetchargs, you can not apply it to registers/stack-entries etc. (for example, '$stack1:x8[8]' is wrong, but '+8($stack):x8[8]' is OK.) +Char type can be used to show the character value of traced arguments. + String type is a special type, which fetches a "null-terminated" string from kernel space. This means it will fail and store NULL if the string container has been paged out. "ustring" type is an alternative of string for user-space. |