lkml.org 
[lkml]   [2017]   [Nov]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 2/6] perf: copy new perf_event.h to tools/include/uapi
Date
perf_event.h is updated in previous patch, this patch applies same
changes to the tools/ version. This is part is put in a separate
patch in case the two files are back ported separately.

Signed-off-by: Song Liu <songliubraving@fb.com>
Reviewed-by: Yonghong Song <yhs@fb.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
---
tools/include/uapi/linux/perf_event.h | 35 +++++++++++++++++++++++++++++++++--
1 file changed, 33 insertions(+), 2 deletions(-)

diff --git a/tools/include/uapi/linux/perf_event.h b/tools/include/uapi/linux/perf_event.h
index 362493a..cc42d59 100644
--- a/tools/include/uapi/linux/perf_event.h
+++ b/tools/include/uapi/linux/perf_event.h
@@ -33,6 +33,7 @@ enum perf_type_id {
PERF_TYPE_HW_CACHE = 3,
PERF_TYPE_RAW = 4,
PERF_TYPE_BREAKPOINT = 5,
+ PERF_TYPE_PROBE = 6,

PERF_TYPE_MAX, /* non-ABI */
};
@@ -299,6 +300,29 @@ 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
+/*
+ * Describe a kprobe or uprobe for PERF_TYPE_PROBE.
+ * perf_event_attr.probe_desc will point to this structure. is_uprobe
+ * and is_return are used to differentiate different types of probe
+ * (k/u, probe/retprobe).
+ *
+ * The two unions should be used as follows:
+ * For uprobe: use path and offset;
+ * For kprobe: if func is empty, use addr
+ * if func is not emtpy, use func and offset
+ */
+struct probe_desc {
+ union {
+ __aligned_u64 func;
+ __aligned_u64 path;
+ };
+ union {
+ __aligned_u64 addr;
+ __u64 offset;
+ };
+};
+
/*
* Hardware event_id to monitor via a performance monitoring event:
*
@@ -320,7 +344,10 @@ struct perf_event_attr {
/*
* Type specific configuration information.
*/
- __u64 config;
+ union {
+ __u64 config;
+ __u64 probe_desc; /* ptr to struct probe_desc */
+ };

union {
__u64 sample_period;
@@ -370,7 +397,11 @@ struct perf_event_attr {
context_switch : 1, /* context switch data */
write_backward : 1, /* Write ring buffer from end to beginning */
namespaces : 1, /* include namespaces data */
- __reserved_1 : 35;
+
+ /* For PERF_TYPE_PROBE */
+ is_uprobe : 1, /* 0: kprobe, 1: uprobe */
+ is_return : 1, /* 0: probe, 1: retprobe */
+ __reserved_1 : 33;

union {
__u32 wakeup_events; /* wakeup every n events */
--
2.9.5
\
 
 \ /
  Last update: 2017-11-15 18:26    [W:0.174 / U:0.336 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site