[PATCH v3 1/6] perf: prepare perf_event.h for new types perf_kprobe and perf_uprobe
From: Song Liu <hidden>
Date: 2017-11-30 23:53:30
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 | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h
index 362493a..247c6cb 100644
--- a/include/uapi/linux/perf_event.h
+++ b/include/uapi/linux/perf_event.h@@ -299,6 +299,8 @@ enum perf_event_read_format { #define PERF_ATTR_SIZE_VER4 104 /* add: sample_regs_intr */ #define PERF_ATTR_SIZE_VER5 112 /* add: aux_watermark */ +#define MAX_PROBE_FUNC_NAME_LEN 64 + /* * Hardware event_id to monitor via a performance monitoring event: *
@@ -380,10 +382,14 @@ 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