1 //===-- sanitizer_vector_test.cc ------------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file is a part of *Sanitizer runtime.
12 //===----------------------------------------------------------------------===//
13 #include "sanitizer_common/sanitizer_ring_buffer.h"
14 #include "gtest/gtest.h"
16 namespace __sanitizer {
22 explicit LargeStruct(int64_t v) : v(v) {}
23 operator int64_t() { return v; }
26 struct Struct10Bytes {
30 TEST(RingBuffer, Construct) {
31 RingBuffer<int64_t> *RBlong = RingBuffer<int64_t>::New(20);
32 EXPECT_EQ(RBlong->size(), 20U);
36 template <class T> void TestRB() {
38 const size_t Sizes[] = {1, 2, 3, 5, 8, 16, 20, 40, 10000};
39 for (size_t Size : Sizes) {
40 RB = RingBuffer<T>::New(Size);
41 EXPECT_EQ(RB->size(), Size);
45 RB = RingBuffer<T>::New(4);
46 EXPECT_EQ(RB->size(), 4U);
47 #define EXPECT_RING_BUFFER(a0, a1, a2, a3) \
48 EXPECT_EQ((int64_t)(*RB)[0], (int64_t)a0); \
49 EXPECT_EQ((int64_t)(*RB)[1], (int64_t)a1); \
50 EXPECT_EQ((int64_t)(*RB)[2], (int64_t)a2); \
51 EXPECT_EQ((int64_t)(*RB)[3], (int64_t)a3);
53 RB->push(T(1)); EXPECT_RING_BUFFER(1, 0, 0, 0);
54 RB->push(T(2)); EXPECT_RING_BUFFER(2, 1, 0, 0);
55 RB->push(T(3)); EXPECT_RING_BUFFER(3, 2, 1, 0);
56 RB->push(T(4)); EXPECT_RING_BUFFER(4, 3, 2, 1);
57 RB->push(T(5)); EXPECT_RING_BUFFER(5, 4, 3, 2);
58 RB->push(T(6)); EXPECT_RING_BUFFER(6, 5, 4, 3);
59 RB->push(T(7)); EXPECT_RING_BUFFER(7, 6, 5, 4);
60 RB->push(T(8)); EXPECT_RING_BUFFER(8, 7, 6, 5);
61 RB->push(T(9)); EXPECT_RING_BUFFER(9, 8, 7, 6);
62 RB->push(T(10)); EXPECT_RING_BUFFER(10, 9, 8, 7);
63 RB->push(T(11)); EXPECT_RING_BUFFER(11, 10, 9, 8);
64 RB->push(T(12)); EXPECT_RING_BUFFER(12, 11, 10, 9);
66 #undef EXPECT_RING_BUFFER
69 #if SANITIZER_WORDSIZE == 64
70 TEST(RingBuffer, int64) {
74 TEST(RingBuffer, LargeStruct) {
75 TestRB<LargeStruct>();
79 CompactRingBuffer<T> *AllocCompactRingBuffer(size_t count) {
80 size_t sz = sizeof(T) * count;
81 EXPECT_EQ(0ULL, sz % 4096);
82 void *p = MmapAlignedOrDieOnFatalError(sz, sz * 2, "CompactRingBuffer");
83 return new CompactRingBuffer<T>(p, sz);
86 TEST(CompactRingBuffer, int64) {
87 const size_t page_sizes[] = {1, 2, 4, 128};
89 for (size_t pages : page_sizes) {
90 size_t count = 4096 * pages / sizeof(int64_t);
91 auto R = AllocCompactRingBuffer<int64_t>(count);
92 int64_t top = count * 3 + 13;
93 for (int64_t i = 0; i < top; ++i) R->push(i);
94 for (int64_t i = 0; i < (int64_t)count; ++i)
95 EXPECT_EQ(top - i - 1, (*R)[i]);
99 } // namespace __sanitizer