1 // Copyright (c) 2007, Google Inc. 2 // All rights reserved. 3 // 4 // Redistribution and use in source and binary forms, with or without 5 // modification, are permitted provided that the following conditions are 6 // met: 7 // 8 // * Redistributions of source code must retain the above copyright 9 // notice, this list of conditions and the following disclaimer. 10 // * Redistributions in binary form must reproduce the above 11 // copyright notice, this list of conditions and the following disclaimer 12 // in the documentation and/or other materials provided with the 13 // distribution. 14 // * Neither the name of Google Inc. nor the names of its 15 // contributors may be used to endorse or promote products derived from 16 // this software without specific prior written permission. 17 // 18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 30 // --- 31 // Author: Arun Sharma 32 33 #include "config_for_unittests.h" 34 #include "system-alloc.h" 35 #include <stdio.h> 36 #if defined HAVE_STDINT_H 37 #include <stdint.h> // to get uintptr_t 38 #elif defined HAVE_INTTYPES_H 39 #include <inttypes.h> // another place uintptr_t might be defined 40 #endif 41 #include <sys/types.h> 42 #include <algorithm> 43 #include <limits> 44 #include "base/logging.h" // for Check_GEImpl, Check_LTImpl, etc 45 #include <gperftools/malloc_extension.h> // for MallocExtension::instance 46 #include "common.h" // for kAddressBits 47 48 class ArraySysAllocator : public SysAllocator { 49 public: 50 // Was this allocator invoked at least once? 51 bool invoked_; 52 53 ArraySysAllocator() : SysAllocator() { 54 ptr_ = 0; 55 invoked_ = false; 56 } 57 58 void* Alloc(size_t size, size_t *actual_size, size_t alignment) { 59 invoked_ = true; 60 61 if (size > kArraySize) { 62 return NULL; 63 } 64 65 void *result = &array_[ptr_]; 66 uintptr_t ptr = reinterpret_cast<uintptr_t>(result); 67 68 if (actual_size) { 69 *actual_size = size; 70 } 71 72 // Try to get more memory for alignment 73 size_t extra = alignment - (ptr & (alignment-1)); 74 size += extra; 75 CHECK_LT(ptr_ + size, kArraySize); 76 77 if ((ptr & (alignment-1)) != 0) { 78 ptr += alignment - (ptr & (alignment-1)); 79 } 80 81 ptr_ += size; 82 return reinterpret_cast<void *>(ptr); 83 } 84 85 void DumpStats() { 86 } 87 88 private: 89 static const int kArraySize = 8 * 1024 * 1024; 90 char array_[kArraySize]; 91 // We allocate the next chunk from here 92 int ptr_; 93 94 }; 95 const int ArraySysAllocator::kArraySize; 96 ArraySysAllocator a; 97 98 static void TestBasicInvoked() { 99 MallocExtension::instance()->SetSystemAllocator(&a); 100 101 // An allocation size that is likely to trigger the system allocator. 102 // XXX: this is implementation specific. 103 char *p = new char[1024 * 1024]; 104 delete [] p; 105 106 // Make sure that our allocator was invoked. 107 CHECK(a.invoked_); 108 } 109 110 #if 0 // could port this to various OSs, but won't bother for now 111 TEST(AddressBits, CpuVirtualBits) { 112 // Check that kAddressBits is as least as large as either the number of bits 113 // in a pointer or as the number of virtual bits handled by the processor. 114 // To be effective this test must be run on each processor model. 115 const int kPointerBits = 8 * sizeof(void*); 116 const int kImplementedVirtualBits = NumImplementedVirtualBits(); 117 118 CHECK_GE(kAddressBits, std::min(kImplementedVirtualBits, kPointerBits)); 119 } 120 #endif 121 122 static void TestBasicRetryFailTest() { 123 // Check with the allocator still works after a failed allocation. 124 // 125 // There is no way to call malloc and guarantee it will fail. malloc takes a 126 // size_t parameter and the C++ standard does not constrain the size of 127 // size_t. For example, consider an implementation where size_t is 32 bits 128 // and pointers are 64 bits. 129 // 130 // It is likely, though, that sizeof(size_t) == sizeof(void*). In that case, 131 // the first allocation here might succeed but the second allocation must 132 // fail. 133 // 134 // If the second allocation succeeds, you will have to rewrite or 135 // disable this test. 136 // The weird parens are to avoid macro-expansion of 'max' on windows. 137 const size_t kHugeSize = (std::numeric_limits<size_t>::max)() / 2; 138 void* p1 = malloc(kHugeSize); 139 void* p2 = malloc(kHugeSize); 140 CHECK(p2 == NULL); 141 if (p1 != NULL) free(p1); 142 143 char* q = new char[1024]; 144 CHECK(q != NULL); 145 delete [] q; 146 } 147 148 int main(int argc, char** argv) { 149 TestBasicInvoked(); 150 TestBasicRetryFailTest(); 151 152 printf("PASS\n"); 153 return 0; 154 } 155
