/*
* Copyright ( C ) 2024 The Android Open Source Project
* All rights reserved .
*
* Redistribution and use in source and binary forms , with or without
* modification , are permitted provided that the following conditions
* are met :
* * Redistributions of source code must retain the above copyright
* notice , this list of conditions and the following disclaimer .
* * Redistributions in binary form must reproduce the above copyright
* notice , this list of conditions and the following disclaimer in
* the documentation and / or other materials provided with the
* distribution .
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* " AS IS " AND ANY EXPRESS OR IMPLIED WARRANTIES , INCLUDING , BUT NOT
* LIMITED TO , THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED . IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT , INDIRECT ,
* INCIDENTAL , SPECIAL , EXEMPLARY , OR CONSEQUENTIAL DAMAGES ( INCLUDING ,
* BUT NOT LIMITED TO , PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES ; LOSS
* OF USE , DATA , OR PROFITS ; OR BUSINESS INTERRUPTION ) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY , WHETHER IN CONTRACT , STRICT LIABILITY ,
* OR TORT ( INCLUDING NEGLIGENCE OR OTHERWISE ) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE , EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE .
*/
#pragma once
/**
* @ file android / crash_detail . h
* @ brief Attach extra information to android crashes .
*/
#include <sys/cdefs.h>
#include <stddef.h>
__BEGIN_DECLS
typedef struct crash_detail_t crash_detail_t;
#if __BIONIC_AVAILABILITY_GUARD(35 )
/**
* Register a new buffer to get logged into tombstones for crashes .
*
* It will be added to both the tombstone proto in the crash_detail field , and
* in the tombstone text format .
*
* Tombstone proto definition :
* https : //cs.android.com/android/platform/superproject/main/+/main:system/core/debuggerd/proto/tombstone.proto
*
* An app can get hold of these for any ` REASON_CRASH_NATIVE ` instance of
* ` android . app . ApplicationExitInfo ` .
*
* https : //developer.android.com/reference/android/app/ApplicationExitInfo#getTraceInputStream()
*
* The lifetime of name and data has to be valid until the program crashes , or until
* android_crash_detail_unregister is called .
*
* Example usage :
* const char * stageName = " garbage_collection " ;
* crash_detail_t * cd = android_crash_detail_register ( " stage " , stageName , strlen ( stageName ) ) ;
* do_garbage_collection ( ) ;
* android_crash_detail_unregister ( cd ) ;
*
* If this example crashes in do_garbage_collection , a line will show up in the textual representation of the tombstone :
* Extra crash detail : stage : ' garbage_collection '
*
* Introduced in API 35 .
*
* \ param name identifying name for this extra data .
* this should generally be a human - readable UTF - 8 string , but we are treating
* it as arbitrary bytes because it could be corrupted by the crash .
* \ param name_size number of bytes of the buffer pointed to by name
* \ param data a buffer containing the extra detail bytes , if null the crash detail
* is disabled until android_crash_detail_replace_data replaces it with
* a non - null pointer .
* \ param data_size number of bytes of the buffer pointed to by data
*
* \ return a handle to the extra crash detail .
*/
crash_detail_t* _Nullable android_crash_detail_register(
const void * _Nonnull name, size_t name_size, const void * _Nullable data, size_t data_size) __INTRODUCED_IN(35 );
#endif
#if __BIONIC_AVAILABILITY_GUARD(35 )
/**
* Unregister crash detail from being logged into tombstones .
*
* After this function returns , the lifetime of the objects crash_detail was
* constructed from no longer needs to be valid .
*
* Introduced in API 35 .
*
* \ param crash_detail the crash_detail that should be removed .
*/
void android_crash_detail_unregister(crash_detail_t* _Nonnull crash_detail) __INTRODUCED_IN(35 );
#endif
#if __BIONIC_AVAILABILITY_GUARD(35 )
/**
* Replace data of crash detail .
*
* This is more efficient than using android_crash_detail_unregister followed by
* android_crash_detail_register . If you very frequently need to swap out the data ,
* you can hold onto the crash_detail .
*
* Introduced in API 35 .
*
* \ param data the new buffer containing the extra detail bytes , or null to disable until
* android_crash_detail_replace_data is called again with non - null data .
* \ param data_size the number of bytes of the buffer pointed to by data .
*/
void android_crash_detail_replace_data(crash_detail_t* _Nonnull crash_detail, const void * _Nullable data, size_t data_size) __INTRODUCED_IN(35 );
#endif
#if __BIONIC_AVAILABILITY_GUARD(35 )
/**
* Replace name of crash detail .
*
* This is more efficient than using android_crash_detail_unregister followed by
* android_crash_detail_register . If you very frequently need to swap out the name ,
* you can hold onto the crash_detail .
*
* Introduced in API 35 .
*
* \ param name identifying name for this extra data .
* \ param name_size number of bytes of the buffer pointed to by name
*/
void android_crash_detail_replace_name(crash_detail_t* _Nonnull crash_detail, const void * _Nonnull name, size_t name_size) __INTRODUCED_IN(35 );
#endif
__END_DECLS
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