1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <shared/dumb_allocator.h> 18 19 #include <gtest/gtest.h> 20 21 static constexpr size_t kAllocSize = 128; 22 static constexpr size_t kSlotCount = 5; 23 24 typedef nanoapp_testing::DumbAllocator<kAllocSize, kSlotCount> DA; 25 26 static void ExpectGoodAlloc(const DA &da, const void *ptr) { 27 EXPECT_NE(nullptr, ptr); 28 EXPECT_TRUE(da.contains(ptr)); 29 } 30 31 TEST(DumbAllocatorTests, SimpleAlloc) { 32 DA da; 33 void *ptr = da.alloc(kAllocSize); 34 ExpectGoodAlloc(da, ptr); 35 EXPECT_TRUE(da.free(ptr)); 36 } 37 38 TEST(DumbAllocatorTests, AllocsAfterFree) { 39 DA da; 40 void *ptrs[kSlotCount]; 41 for (size_t i = 0; i < kSlotCount; i++) { 42 ptrs[i] = da.alloc(kAllocSize); 43 ExpectGoodAlloc(da, ptrs[i]); 44 // Also confirm we're not doubly allocating the same pointer. 45 for (size_t j = 0; j < i; j++) { 46 EXPECT_NE(ptrs[j], ptrs[i]); 47 } 48 } 49 // Out of slots, allocation should fail. 50 EXPECT_EQ(nullptr, da.alloc(kAllocSize)); 51 52 constexpr size_t kFreeIndex = kSlotCount / 2; 53 EXPECT_TRUE(da.free(ptrs[kFreeIndex])); 54 ptrs[kFreeIndex] = nullptr; 55 56 // Now our allocation should succeed. 57 void *newPtr = da.alloc(kAllocSize); 58 ExpectGoodAlloc(da, newPtr); 59 for (size_t i = 0; i < kSlotCount; i++) { 60 EXPECT_NE(newPtr, ptrs[i]); 61 } 62 } 63 64 TEST(DumbAllocatorTests, ContainsIsFalseForBadPtrs) { 65 DA da; 66 uint8_t *ptr = static_cast<uint8_t*>(da.alloc(kAllocSize)); 67 ASSERT_NE(nullptr, ptr); 68 EXPECT_FALSE(da.contains(ptr - 1)); 69 EXPECT_FALSE(da.contains(ptr + 1)); 70 EXPECT_FALSE(da.contains(nullptr)); 71 } 72 73 TEST(DumbAllocatorTests, FailLargeAllocations) { 74 DA da; 75 EXPECT_EQ(nullptr, da.alloc(kAllocSize + 1)); 76 EXPECT_EQ(nullptr, da.alloc(kAllocSize * 2)); 77 } 78 79 TEST(DumbAllocatorTests, SucceedSmallAllocations) { 80 DA da; 81 ExpectGoodAlloc(da, da.alloc(kAllocSize - 1)); 82 ExpectGoodAlloc(da, da.alloc(1)); 83 ExpectGoodAlloc(da, da.alloc(0)); 84 } 85
