1 /*
2  * Copyright (C) 2015 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef SIMPLE_PERF_EVENT_H_
18 #define SIMPLE_PERF_EVENT_H_
19 
20 #include <stdint.h>
21 #include <memory>
22 #include <string>
23 #include <vector>
24 
25 // A uint32_t value far from 0 is picked, so it is unlikely to conflict with further
26 // PERF_TYPE_* events.
27 static constexpr uint32_t SIMPLEPERF_TYPE_USER_SPACE_SAMPLERS = 32768;
28 
29 enum {
30   SIMPLEPERF_CONFIG_INPLACE_SAMPLER,
31 };
32 
33 // EventType represents one type of event, like cpu_cycle_event, cache_misses_event.
34 // The user knows one event type by its name, and the kernel knows one event type by its
35 // (type, config) pair. EventType connects the two representations, and tells the user if
36 // the event type is supported by the kernel.
37 
38 struct EventType {
EventTypeEventType39   EventType(const std::string& name, uint32_t type, uint64_t config)
40       : name(name), type(type), config(config) {
41   }
42 
EventTypeEventType43   EventType() : type(0), config(0) {
44   }
45 
46   std::string name;
47   uint32_t type;
48   uint64_t config;
49 };
50 
51 const std::vector<EventType>& GetAllEventTypes();
52 const EventType* FindEventTypeByName(const std::string& name);
53 
54 struct EventTypeAndModifier {
55   std::string name;
56   EventType event_type;
57   std::string modifier;
58   bool exclude_user;
59   bool exclude_kernel;
60   bool exclude_hv;
61   bool exclude_host;
62   bool exclude_guest;
63   int precise_ip : 2;
64 
EventTypeAndModifierEventTypeAndModifier65   EventTypeAndModifier()
66       : exclude_user(false),
67         exclude_kernel(false),
68         exclude_hv(false),
69         exclude_host(false),
70         exclude_guest(false),
71         precise_ip(0) {
72   }
73 };
74 
75 std::unique_ptr<EventTypeAndModifier> ParseEventType(const std::string& event_type_str);
76 
77 #endif  // SIMPLE_PERF_EVENT_H_
78