[PATCH v4 1/6] perf: prepare perf_event.h for new types perf_kprobe and perf_uprobe
From: Song Liu <hidden>
Date: 2017-12-05 01:28:54
Also in:
lkml
Subsystem:
performance events subsystem, the rest · Maintainers:
Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo, Namhyung Kim, Linus Torvalds
Two new perf types, perf_kprobe and perf_uprobe, will be added to allow creating [k,u]probe with perf_event_open. These [k,u]probe are associated with the file decriptor created by perf_event_open, thus are easy to clean when the file descriptor is destroyed. kprobe_func and uprobe_path are added to union config1 for pointers to function name for kprobe or binary path for uprobe. kprobe_addr and probe_offset are added to union config2 for kernel address (when kprobe_func is NULL), or [k,u]probe offset. Signed-off-by: Song Liu <redacted> Reviewed-by: Yonghong Song <redacted> Reviewed-by: Josef Bacik <redacted> Acked-by: Alexei Starovoitov <ast@kernel.org> --- include/uapi/linux/perf_event.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h
index 362493a..0f39b31 100644
--- a/include/uapi/linux/perf_event.h
+++ b/include/uapi/linux/perf_event.h@@ -291,6 +291,16 @@ enum perf_event_read_format { PERF_FORMAT_MAX = 1U << 4, /* non-ABI */ }; +/* + * Flags in config, used by dynamic PMU kprobe and uprobe + * + * PERF_PROBE_CONFIG_IS_RETPROBE if set, create kretprobe/uretprobe + * if not set, create kprobe/uprobe + */ +enum perf_probe_config { + PERF_PROBE_CONFIG_IS_RETPROBE = 1U << 0, /* [k,u]retprobe */ +}; + #define PERF_ATTR_SIZE_VER0 64 /* sizeof first published struct */ #define PERF_ATTR_SIZE_VER1 72 /* add: config2 */ #define PERF_ATTR_SIZE_VER2 80 /* add: branch_sample_type */
@@ -380,10 +390,14 @@ struct perf_event_attr { __u32 bp_type; union { __u64 bp_addr; + __u64 kprobe_func; /* for perf_kprobe */ + __u64 uprobe_path; /* for perf_uprobe */ __u64 config1; /* extension of config */ }; union { __u64 bp_len; + __u64 kprobe_addr; /* when kprobe_func == NULL */ + __u64 probe_offset; /* for perf_[k,u]probe */ __u64 config2; /* extension of config1 */ }; __u64 branch_sample_type; /* enum perf_branch_sample_type */
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2.9.5