1//===-- vector_test.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 "tests/scudo_unit_test.h"
10
11#include "vector.h"
12
13TEST(ScudoVectorTest, Basic) {
14 scudo::Vector<int, 64U> V;
15 EXPECT_EQ(V.size(), 0U);
16 V.push_back(Element: 42);
17 EXPECT_EQ(V.size(), 1U);
18 EXPECT_EQ(V[0], 42);
19 V.push_back(Element: 43);
20 EXPECT_EQ(V.size(), 2U);
21 EXPECT_EQ(V[0], 42);
22 EXPECT_EQ(V[1], 43);
23}
24
25TEST(ScudoVectorTest, Stride) {
26 scudo::Vector<scudo::uptr, 32U> V;
27 for (scudo::uptr I = 0; I < 1000; I++) {
28 V.push_back(Element: I);
29 EXPECT_EQ(V.size(), I + 1U);
30 EXPECT_EQ(V[I], I);
31 }
32 for (scudo::uptr I = 0; I < 1000; I++)
33 EXPECT_EQ(V[I], I);
34}
35
36TEST(ScudoVectorTest, ResizeReduction) {
37 scudo::Vector<int, 64U> V;
38 V.push_back(Element: 0);
39 V.push_back(Element: 0);
40 EXPECT_EQ(V.size(), 2U);
41 V.resize(NewSize: 1);
42 EXPECT_EQ(V.size(), 1U);
43}
44
45#if defined(__linux__)
46
47#include <sys/resource.h>
48
49// Verify that if the reallocate fails, nothing new is added.
50TEST(ScudoVectorTest, ReallocateFails) {
51 scudo::Vector<char, 256U> V;
52 scudo::uptr capacity = V.capacity();
53
54 // Get the current address space size.
55 rlimit Limit = {};
56 EXPECT_EQ(0, getrlimit(RLIMIT_AS, rlimits: &Limit));
57
58 rlimit EmptyLimit = {.rlim_cur = 0, .rlim_max = Limit.rlim_max};
59 EXPECT_EQ(0, setrlimit(RLIMIT_AS, rlimits: &EmptyLimit));
60
61 // qemu does not honor the setrlimit, so verify before proceeding.
62 scudo::MemMapT MemMap;
63 if (MemMap.map(/*Addr=*/0U, Size: scudo::getPageSizeCached(), Name: "scudo:test",
64 MAP_ALLOWNOMEM)) {
65 MemMap.unmap();
66 setrlimit(RLIMIT_AS, rlimits: &Limit);
67 TEST_SKIP("Limiting address space does not prevent mmap.");
68 }
69
70 V.resize(NewSize: capacity);
71 // Set the last element so we can check it later.
72 V.back() = '\0';
73
74 // The reallocate should fail, so the capacity should not change.
75 V.reserve(NewSize: capacity + 1000);
76 EXPECT_EQ(capacity, V.capacity());
77
78 // Now try to do a push back and verify that the size does not change.
79 scudo::uptr Size = V.size();
80 V.push_back(Element: '2');
81 EXPECT_EQ(Size, V.size());
82 // Verify that the last element in the vector did not change.
83 EXPECT_EQ('\0', V.back());
84
85 EXPECT_EQ(0, setrlimit(RLIMIT_AS, rlimits: &Limit));
86}
87#endif
88

source code of compiler-rt/lib/scudo/standalone/tests/vector_test.cpp