During fault locating, the file name needs to be printed based on the dentry/file address. The offset needs to be calculated each time, which is troublesome. Similar to printk, kprobe supports printing file names for dentry/file addresses.
Diff v4 vs v3: 1. Use "argv[i][idx + 3] == 'd'" instead of "argv[i][strlen(argv[i]) - 1] == 'd'" to judge print format in PATCH[4/7]; Diff v3 vs v2: 1. Return the index of where the suffix was found in str_has_suffix(); Diff v2 vs v1: 1. Use "%pd/%pD" print format instead of "pd/pD" print format; 2. Add "%pd/%pD" in README; 3. Expand "%pd/%pD" argument before parameter parsing; 4. Add more detail information in ftrace documentation; 5. Add test cases for new print format in selftests/ftrace; Ye Bin (7): string.h: add str_has_suffix() helper for test string ends with specify string tracing/probes: add traceprobe_expand_dentry_args() helper tracing/probes: support '%pd' type for print struct dentry's name tracing/probes: support '%pD' type for print struct file's name tracing: add new type "%pd/%pD" in readme_msg[] Documentation: tracing: add new type '%pd' and '%pD' for kprobe selftests/ftrace: add test cases for VFS type "%pd" and "%pD" Documentation/trace/kprobetrace.rst | 6 +- include/linux/string.h | 28 +++++++ kernel/trace/trace.c | 2 +- kernel/trace/trace_kprobe.c | 6 ++ kernel/trace/trace_probe.c | 47 +++++++++++ kernel/trace/trace_probe.h | 3 + .../ftrace/test.d/kprobe/kprobe_args_vfs.tc | 79 +++++++++++++++++++ 7 files changed, 169 insertions(+), 2 deletions(-) create mode 100644 tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_vfs.tc -- 2.31.1