82 lines
3.1 KiB
C
82 lines
3.1 KiB
C
/*
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* Copyright (C) 2019 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#pragma once
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#include <sys/cdefs.h>
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#include <stdbool.h>
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#include <stdint.h>
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__BEGIN_DECLS
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// Types of an android_fdtrack_event.
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enum android_fdtrack_event_type {
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// File descriptor creation: create is the active member of android_fdtrack_event::data.
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ANDROID_FDTRACK_EVENT_TYPE_CREATE,
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// File descriptor closed.
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ANDROID_FDTRACK_EVENT_TYPE_CLOSE,
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};
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wnullability-completeness"
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struct android_fdtrack_event {
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// File descriptor for which this event occurred.
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int fd;
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// Type of event: this is one of the enumerators of android_fdtrack_event_type.
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uint8_t type;
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// Data for the event.
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union {
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struct {
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const char* function_name;
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} create;
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} data;
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};
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#pragma clang diagnostic pop
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// Callback invoked upon file descriptor creation/closure.
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typedef void (*_Nullable android_fdtrack_hook_t)(struct android_fdtrack_event* _Nullable);
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// Register a hook which is called to track fd lifecycle events.
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// Set value to null to disable tracking.
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bool android_fdtrack_compare_exchange_hook(android_fdtrack_hook_t* _Nonnull expected,
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android_fdtrack_hook_t value) __INTRODUCED_IN(30);
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// Enable/disable fdtrack *on the current thread*.
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// This is primarily useful when performing operations which you don't want to track
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// (e.g. when emitting already-recorded information).
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bool android_fdtrack_get_enabled() __INTRODUCED_IN(30);
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bool android_fdtrack_set_enabled(bool new_value) __INTRODUCED_IN(30);
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// Globally enable/disable fdtrack.
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// This is primaryily useful to reenable fdtrack after it's been automatically disabled post-fork.
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void android_fdtrack_set_globally_enabled(bool new_value) __INTRODUCED_IN(31);
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__END_DECLS
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