/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef SIMPLE_PERF_EVENT_H_
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#define SIMPLE_PERF_EVENT_H_
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#include <stdint.h>
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#include <strings.h>
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#include <memory>
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#include <set>
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#include <string>
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#include <vector>
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// A uint32_t value far from 0 is picked, so it is unlikely to conflict with further
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// PERF_TYPE_* events.
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static constexpr uint32_t SIMPLEPERF_TYPE_USER_SPACE_SAMPLERS = 32768;
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enum {
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SIMPLEPERF_CONFIG_INPLACE_SAMPLER,
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};
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// EventType represents one type of event, like cpu_cycle_event, cache_misses_event.
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// The user knows one event type by its name, and the kernel knows one event type by its
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// (type, config) pair. EventType connects the two representations, and tells the user if
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// the event type is supported by the kernel.
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struct EventType {
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EventType(const std::string& name, uint32_t type, uint64_t config,
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const std::string& description, const std::string& limited_arch)
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: name(name), type(type), config(config), description(description),
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limited_arch(limited_arch) {
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}
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EventType() : type(0), config(0) {
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}
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bool operator<(const EventType& other) const {
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return strcasecmp(name.c_str(), other.name.c_str()) < 0;
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}
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std::string name;
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uint32_t type;
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uint64_t config;
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std::string description;
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std::string limited_arch;
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};
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bool SetTracepointEventsFilePath(const std::string& filepath);
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std::string GetTracepointEvents();
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// Used to temporarily change event types returned by GetAllEventTypes().
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class ScopedEventTypes {
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public:
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static std::string BuildString(const std::vector<const EventType*>& event_types);
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ScopedEventTypes(const std::string& event_type_str);
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~ScopedEventTypes();
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private:
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std::set<EventType> saved_event_types_;
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};
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const std::set<EventType>& GetAllEventTypes();
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const EventType* FindEventTypeByName(const std::string& name, bool report_error = true);
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struct EventTypeAndModifier {
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std::string name;
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EventType event_type;
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std::string modifier;
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bool exclude_user;
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bool exclude_kernel;
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bool exclude_hv;
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bool exclude_host;
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bool exclude_guest;
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int precise_ip : 2;
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EventTypeAndModifier()
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: exclude_user(false),
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exclude_kernel(false),
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exclude_hv(false),
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exclude_host(false),
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exclude_guest(false),
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precise_ip(0) {
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}
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};
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std::unique_ptr<EventTypeAndModifier> ParseEventType(const std::string& event_type_str);
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#endif // SIMPLE_PERF_EVENT_H_
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