/*
* Copyright ( C ) 2013 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 .
*/
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <gtest/gtest.h>
#include "private/bionic_allocator.h"
#include <unistd.h>
namespace {
/*
* this one has size below allocator cap which is 2 * sizeof ( void * )
*/
struct test_struct_small {
char str[5 ];
};
struct test_struct_large {
char str[1009 ];
};
struct test_struct_huge {
char str[73939 ];
};
struct test_struct_512 {
char str[503 ];
};
};
static size_t kPageSize = sysconf(_SC_PAGE_SIZE);
TEST(bionic_allocator, test_alloc_0) {
BionicAllocator allocator;
void * ptr = allocator.alloc(0 );
ASSERT_TRUE(ptr != nullptr);
allocator.free(ptr);
}
TEST(bionic_allocator, test_free_nullptr) {
BionicAllocator allocator;
allocator.free(nullptr);
}
TEST(bionic_allocator, test_realloc) {
BionicAllocator allocator;
uint32_t* array = reinterpret_cast <uint32_t*>(allocator.alloc(512 ));
const size_t array_size = 512 / sizeof (uint32_t);
uint32_t model[1000 ];
model[0 ] = 1 ;
model[1 ] = 1 ;
for (size_t i = 2 ; i < 1000 ; ++i) {
model[i] = model[i - 1 ] + model[i - 2 ];
}
memcpy(array, model, array_size);
uint32_t* reallocated_ptr = reinterpret_cast <uint32_t*>(allocator.realloc(array, 1024 ));
ASSERT_TRUE(reallocated_ptr != nullptr);
ASSERT_TRUE(reallocated_ptr != array);
ASSERT_TRUE(memcmp(reallocated_ptr, model, array_size) == 0 );
array = reallocated_ptr;
memcpy(array, model, 2 *array_size);
reallocated_ptr = reinterpret_cast <uint32_t*>(allocator.realloc(array, 62 ));
ASSERT_TRUE(reallocated_ptr == array);
reallocated_ptr = reinterpret_cast <uint32_t*>(allocator.realloc(array, 4000 ));
ASSERT_TRUE(reallocated_ptr != nullptr);
ASSERT_TRUE(reallocated_ptr != array);
ASSERT_EQ(0 U, reinterpret_cast <uintptr_t>(reallocated_ptr) % 16 );
ASSERT_TRUE(memcmp(reallocated_ptr, model, array_size * 2 ) == 0 );
array = reallocated_ptr;
memcpy(array, model, 4000 );
reallocated_ptr = reinterpret_cast <uint32_t*>(allocator.realloc(array, 64000 ));
ASSERT_TRUE(reallocated_ptr != nullptr);
ASSERT_TRUE(reallocated_ptr != array);
ASSERT_EQ(0 U, reinterpret_cast <uintptr_t>(reallocated_ptr) % 16 );
ASSERT_TRUE(memcmp(reallocated_ptr, model, 4000 ) == 0 );
ASSERT_EQ(nullptr, allocator.realloc(reallocated_ptr, 0 ));
}
TEST(bionic_allocator, test_small_smoke) {
BionicAllocator allocator;
uint8_t zeros[16 ];
memset(zeros, 0 , sizeof (zeros));
test_struct_small* ptr1 =
reinterpret_cast <test_struct_small*>(allocator.alloc(sizeof (test_struct_small)));
test_struct_small* ptr2 =
reinterpret_cast <test_struct_small*>(allocator.alloc(sizeof (test_struct_small)));
ASSERT_TRUE(ptr1 != nullptr);
ASSERT_EQ(0 U, reinterpret_cast <uintptr_t>(ptr1) % 16 );
ASSERT_TRUE(ptr2 != nullptr);
ASSERT_EQ(0 U, reinterpret_cast <uintptr_t>(ptr2) % 16 );
ASSERT_EQ(reinterpret_cast <uintptr_t>(ptr1)+16 , reinterpret_cast <uintptr_t>(ptr2));
ASSERT_TRUE(memcmp(ptr1, zeros, 16 ) == 0 );
allocator.free(ptr1);
allocator.free(ptr2);
}
TEST(bionic_allocator, test_huge_smoke) {
BionicAllocator allocator;
// this should trigger proxy-to-mmap
test_struct_huge* ptr1 =
reinterpret_cast <test_struct_huge*>(allocator.alloc(sizeof (test_struct_huge)));
test_struct_huge* ptr2 =
reinterpret_cast <test_struct_huge*>(allocator.alloc(sizeof (test_struct_huge)));
ASSERT_TRUE(ptr1 != nullptr);
ASSERT_EQ(0 U, reinterpret_cast <uintptr_t>(ptr1) % 16 );
ASSERT_TRUE(ptr2 != nullptr);
ASSERT_EQ(0 U, reinterpret_cast <uintptr_t>(ptr2) % 16 );
ASSERT_TRUE(
reinterpret_cast <uintptr_t>(ptr1)/kPageSize != reinterpret_cast <uintptr_t>(ptr2)/kPageSize);
allocator.free(ptr2);
allocator.free(ptr1);
}
TEST(bionic_allocator, test_large) {
BionicAllocator allocator;
test_struct_large* ptr1 =
reinterpret_cast <test_struct_large*>(allocator.alloc(sizeof (test_struct_large)));
test_struct_large* ptr2 =
reinterpret_cast <test_struct_large*>(allocator.alloc(1024 ));
ASSERT_TRUE(ptr1 != nullptr);
ASSERT_EQ(0 U, reinterpret_cast <uintptr_t>(ptr1) % 16 );
ASSERT_TRUE(ptr2 != nullptr);
ASSERT_EQ(0 U, reinterpret_cast <uintptr_t>(ptr2) % 16 );
ASSERT_EQ(reinterpret_cast <uintptr_t>(ptr1) + 1024 , reinterpret_cast <uintptr_t>(ptr2));
// let's allocate until we reach the next page.
size_t n = kPageSize / sizeof (test_struct_large) + 1 - 2 ;
test_struct_large* objects[n];
for (size_t i = 0 ; i < n; ++i) {
test_struct_large* obj_ptr =
reinterpret_cast <test_struct_large*>(allocator.alloc(sizeof (test_struct_large)));
ASSERT_TRUE(obj_ptr != nullptr);
objects[i] = obj_ptr;
}
test_struct_large* ptr_to_free =
reinterpret_cast <test_struct_large*>(allocator.alloc(sizeof (test_struct_large)));
ASSERT_TRUE(ptr_to_free != nullptr);
ASSERT_EQ(0 U, reinterpret_cast <uintptr_t>(ptr_to_free) % 16 );
allocator.free(ptr1);
for (size_t i=0 ; i<n; ++i) {
allocator.free(objects[i]);
}
allocator.free(ptr2);
allocator.free(ptr_to_free);
}
TEST(bionic_allocator, test_memalign_small) {
BionicAllocator allocator;
void * ptr;
// simple case
ptr = allocator.memalign(0 x100, 0 x100);
ASSERT_TRUE(ptr != nullptr);
ASSERT_EQ(0 U, reinterpret_cast <uintptr_t>(ptr) % 0 x100);
allocator.free(ptr);
// small objects are automatically aligned to their size.
ptr = allocator.alloc(0 x200);
ASSERT_TRUE(ptr != nullptr);
ASSERT_EQ(0 U, reinterpret_cast <uintptr_t>(ptr) % 0 x200);
allocator.free(ptr);
// the size (0x10) is bumped up to the alignment (0x100)
ptr = allocator.memalign(0 x100, 0 x10);
ASSERT_TRUE(ptr != nullptr);
ASSERT_EQ(0 U, reinterpret_cast <uintptr_t>(ptr) % 0 x100);
allocator.free(ptr);
}
TEST(bionic_allocator, test_memalign_large) {
BionicAllocator allocator;
void * ptr;
size_t alignment;
// a large object with alignment < kPageSize
alignment = kPageSize >> 1 ;
ptr = allocator.memalign(alignment, 0 x2000);
ASSERT_TRUE(ptr != nullptr);
ASSERT_EQ(0 U, reinterpret_cast <uintptr_t>(ptr) % alignment);
allocator.free(ptr);
// a large object with alignment == kPageSize
alignment = kPageSize;
ptr = allocator.memalign(alignment, 0 x2000);
ASSERT_TRUE(ptr != nullptr);
ASSERT_EQ(0 U, reinterpret_cast <uintptr_t>(ptr) % alignment);
allocator.free(ptr);
// A large object with alignment > kPageSize is only guaranteed to have page
// alignment.
alignment = kPageSize << 1 ;
ptr = allocator.memalign(alignment, 0 x4000);
ASSERT_TRUE(ptr != nullptr);
ASSERT_EQ(0 U, reinterpret_cast <uintptr_t>(ptr) % kPageSize);
allocator.free(ptr);
}
Messung V0.5 in Prozent C=98 H=96 G=96
¤ Dauer der Verarbeitung: 0.1 Sekunden
(vorverarbeitet am 2026-06-28)
¤
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