130 lines
3.3 KiB
C++
130 lines
3.3 KiB
C++
/*
|
|
* Copyright (C) 2013 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sys/mman.h>
|
|
|
|
#include <gtest/gtest.h>
|
|
|
|
#include "../linker_block_allocator.h"
|
|
|
|
#include <unistd.h>
|
|
|
|
namespace {
|
|
|
|
struct test_struct_nominal {
|
|
void* pointer;
|
|
ssize_t value;
|
|
};
|
|
|
|
/*
|
|
* this one has size below allocator cap which is 2*sizeof(void*)
|
|
*/
|
|
struct test_struct_small {
|
|
char dummy_str[5];
|
|
};
|
|
|
|
/*
|
|
* 1009 byte struct (1009 is prime)
|
|
*/
|
|
struct test_struct_larger {
|
|
char dummy_str[1009];
|
|
};
|
|
|
|
static size_t kPageSize = sysconf(_SC_PAGE_SIZE);
|
|
};
|
|
|
|
TEST(linker_allocator, test_nominal) {
|
|
LinkerTypeAllocator<test_struct_nominal> allocator;
|
|
|
|
test_struct_nominal* ptr1 = allocator.alloc();
|
|
ASSERT_TRUE(ptr1 != nullptr);
|
|
test_struct_nominal* ptr2 = allocator.alloc();
|
|
ASSERT_TRUE(ptr2 != nullptr);
|
|
// they should be next to each other.
|
|
ASSERT_EQ(ptr1+1, ptr2);
|
|
|
|
ptr1->value = 42;
|
|
|
|
allocator.free(ptr1);
|
|
allocator.free(ptr2);
|
|
}
|
|
|
|
TEST(linker_allocator, test_small) {
|
|
LinkerTypeAllocator<test_struct_small> allocator;
|
|
|
|
char* ptr1 = reinterpret_cast<char*>(allocator.alloc());
|
|
char* ptr2 = reinterpret_cast<char*>(allocator.alloc());
|
|
|
|
ASSERT_TRUE(ptr1 != nullptr);
|
|
ASSERT_TRUE(ptr2 != nullptr);
|
|
ASSERT_EQ(ptr1+2*sizeof(void*), ptr2);
|
|
}
|
|
|
|
TEST(linker_allocator, test_larger) {
|
|
LinkerTypeAllocator<test_struct_larger> allocator;
|
|
|
|
test_struct_larger* ptr1 = allocator.alloc();
|
|
test_struct_larger* ptr2 = allocator.alloc();
|
|
|
|
ASSERT_TRUE(ptr1 != nullptr);
|
|
ASSERT_TRUE(ptr2 != nullptr);
|
|
|
|
ASSERT_EQ(ptr1+1, ptr2);
|
|
|
|
// lets allocate until we reach next page.
|
|
size_t n = kPageSize/sizeof(test_struct_larger) + 1 - 2;
|
|
|
|
for (size_t i=0; i<n; ++i) {
|
|
ASSERT_TRUE(allocator.alloc() != nullptr);
|
|
}
|
|
|
|
test_struct_larger* ptr_to_free = allocator.alloc();
|
|
ASSERT_TRUE(ptr_to_free != nullptr);
|
|
allocator.free(ptr1);
|
|
}
|
|
|
|
static void protect_all() {
|
|
LinkerTypeAllocator<test_struct_larger> allocator;
|
|
|
|
// number of allocs to reach the end of first page
|
|
size_t n = kPageSize/sizeof(test_struct_larger) - 1;
|
|
test_struct_larger* page1_ptr = allocator.alloc();
|
|
|
|
for (size_t i=0; i<n; ++i) {
|
|
allocator.alloc();
|
|
}
|
|
|
|
test_struct_larger* page2_ptr = allocator.alloc();
|
|
allocator.protect_all(PROT_READ);
|
|
allocator.protect_all(PROT_READ | PROT_WRITE);
|
|
// check access
|
|
page2_ptr->dummy_str[23] = 27;
|
|
page1_ptr->dummy_str[13] = 11;
|
|
|
|
allocator.protect_all(PROT_READ);
|
|
fprintf(stderr, "trying to access protected page");
|
|
|
|
// this should result in segmentation fault
|
|
page1_ptr->dummy_str[11] = 7;
|
|
}
|
|
|
|
TEST(linker_allocator, test_protect) {
|
|
testing::FLAGS_gtest_death_test_style = "threadsafe";
|
|
ASSERT_EXIT(protect_all(), testing::KilledBySignal(SIGSEGV), "trying to access protected page");
|
|
}
|
|
|