compiler-rt/lib/gwp_asan/tests/basic.cpp

   1 //===-- basic.cpp -----------------------------------------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "gwp_asan/tests/harness.h"
  10
  11 TEST_F(CustomGuardedPoolAllocator, BasicAllocation) {
  12   InitNumSlots(1);
  13   void *Ptr = GPA.allocate(1);
  14   EXPECT_NE(nullptr, Ptr);
  15   EXPECT_TRUE(GPA.pointerIsMine(Ptr));
  16   EXPECT_EQ(1u, GPA.getSize(Ptr));
  17   GPA.deallocate(Ptr);
  18 }
  19
  20 TEST_F(DefaultGuardedPoolAllocator, NullptrIsNotMine) {
  21   EXPECT_FALSE(GPA.pointerIsMine(nullptr));
  22 }
  23
  24 TEST_F(CustomGuardedPoolAllocator, SizedAllocations) {
  25   InitNumSlots(1);
  26
  27   std::size_t MaxAllocSize = GPA.getAllocatorState()->maximumAllocationSize();
  28   EXPECT_TRUE(MaxAllocSize > 0);
  29
  30   for (unsigned AllocSize = 1; AllocSize <= MaxAllocSize; AllocSize <<= 1) {
  31     void *Ptr = GPA.allocate(AllocSize);
  32     EXPECT_NE(nullptr, Ptr);
  33     EXPECT_TRUE(GPA.pointerIsMine(Ptr));
  34     EXPECT_EQ(AllocSize, GPA.getSize(Ptr));
  35     GPA.deallocate(Ptr);
  36   }
  37 }
  38
  39 TEST_F(DefaultGuardedPoolAllocator, TooLargeAllocation) {
  40   EXPECT_EQ(nullptr,
  41             GPA.allocate(GPA.getAllocatorState()->maximumAllocationSize() + 1));
  42   EXPECT_EQ(nullptr, GPA.allocate(SIZE_MAX, 0));
  43   EXPECT_EQ(nullptr, GPA.allocate(SIZE_MAX, 1));
  44   EXPECT_EQ(nullptr, GPA.allocate(0, SIZE_MAX / 2));
  45   EXPECT_EQ(nullptr, GPA.allocate(1, SIZE_MAX / 2));
  46   EXPECT_EQ(nullptr, GPA.allocate(SIZE_MAX, SIZE_MAX / 2));
  47 }
  48
  49 TEST_F(DefaultGuardedPoolAllocator, ZeroSizeAndAlignmentAllocations) {
  50   void *P;
  51   EXPECT_NE(nullptr, (P = GPA.allocate(0, 0)));
  52   GPA.deallocate(P);
  53   EXPECT_NE(nullptr, (P = GPA.allocate(1, 0)));
  54   GPA.deallocate(P);
  55   EXPECT_NE(nullptr, (P = GPA.allocate(0, 1)));
  56   GPA.deallocate(P);
  57 }
  58
  59 TEST_F(DefaultGuardedPoolAllocator, NonPowerOfTwoAlignment) {
  60   EXPECT_EQ(nullptr, GPA.allocate(0, 3));
  61   EXPECT_EQ(nullptr, GPA.allocate(1, 3));
  62   EXPECT_EQ(nullptr, GPA.allocate(0, SIZE_MAX));
  63   EXPECT_EQ(nullptr, GPA.allocate(1, SIZE_MAX));
  64 }
  65
  66 // Added multi-page slots? You'll need to expand this test.
  67 TEST_F(DefaultGuardedPoolAllocator, TooBigForSinglePageSlots) {
  68   EXPECT_EQ(nullptr, GPA.allocate(0x1001, 0));
  69   EXPECT_EQ(nullptr, GPA.allocate(0x1001, 1));
  70   EXPECT_EQ(nullptr, GPA.allocate(0x1001, 0x1000));
  71   EXPECT_EQ(nullptr, GPA.allocate(1, 0x2000));
  72   EXPECT_EQ(nullptr, GPA.allocate(0, 0x2000));
  73 }
  74
  75 TEST_F(CustomGuardedPoolAllocator, AllocAllSlots) {
  76   constexpr unsigned kNumSlots = 128;
  77   InitNumSlots(kNumSlots);
  78   void *Ptrs[kNumSlots];
  79   for (unsigned i = 0; i < kNumSlots; ++i) {
  80     Ptrs[i] = GPA.allocate(1);
  81     EXPECT_NE(nullptr, Ptrs[i]);
  82     EXPECT_TRUE(GPA.pointerIsMine(Ptrs[i]));
  83   }
  84
  85   // This allocation should fail as all the slots are used.
  86   void *Ptr = GPA.allocate(1);
  87   EXPECT_EQ(nullptr, Ptr);
  88   EXPECT_FALSE(GPA.pointerIsMine(nullptr));
  89
  90   for (unsigned i = 0; i < kNumSlots; ++i)
  91     GPA.deallocate(Ptrs[i]);
  92 }