1//===- ASanStackFrameLayoutTest.cpp - Tests for ComputeASanStackFrameLayout===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9#include "llvm/Transforms/Utils/ASanStackFrameLayout.h"
10#include "llvm/ADT/ArrayRef.h"
11#include "gtest/gtest.h"
12#include <sstream>
13
14using namespace llvm;
15
16static std::string
17ShadowBytesToString(ArrayRef<uint8_t> ShadowBytes) {
18  std::ostringstream os;
19  for (size_t i = 0, n = ShadowBytes.size(); i < n; i++) {
20    switch (ShadowBytes[i]) {
21      case kAsanStackLeftRedzoneMagic:    os << "L"; break;
22      case kAsanStackRightRedzoneMagic:   os << "R"; break;
23      case kAsanStackMidRedzoneMagic:     os << "M"; break;
24      default:                            os << (unsigned)ShadowBytes[i];
25    }
26  }
27  return os.str();
28}
29
30static void TestLayout(SmallVector<ASanStackVariableDescription, 10> Vars,
31                       size_t Granularity, size_t MinHeaderSize,
32                       const std::string &ExpectedDescr,
33                       const std::string &ExpectedShadow) {
34  ASanStackFrameLayout L;
35  ComputeASanStackFrameLayout(Vars, Granularity, MinHeaderSize, &L);
36  EXPECT_EQ(ExpectedDescr, L.DescriptionString);
37  EXPECT_EQ(ExpectedShadow, ShadowBytesToString(L.ShadowBytes));
38}
39
40TEST(ASanStackFrameLayout, Test) {
41#define VEC1(a) SmallVector<ASanStackVariableDescription, 10>(1, a)
42#define VEC(a)                                                                 \
43  SmallVector<ASanStackVariableDescription, 10>(a, a + sizeof(a) / sizeof(a[0]))
44
45#define VAR(name, size, alignment)                                             \
46  ASanStackVariableDescription name##size##_##alignment = {                    \
47    #name #size "_" #alignment,                                                \
48    size,                                                                      \
49    alignment,                                                                 \
50    0,                                                                         \
51    0                                                                          \
52  }
53
54  VAR(a, 1, 1);
55  VAR(p, 1, 32);
56  VAR(p, 1, 256);
57  VAR(a, 2, 1);
58  VAR(a, 3, 1);
59  VAR(a, 4, 1);
60  VAR(a, 7, 1);
61  VAR(a, 8, 1);
62  VAR(a, 9, 1);
63  VAR(a, 16, 1);
64  VAR(a, 41, 1);
65  VAR(a, 105, 1);
66
67  TestLayout(VEC1(a1_1), 8, 16, "1 16 1 4 a1_1", "LL1R");
68  TestLayout(VEC1(a1_1), 64, 64, "1 64 1 4 a1_1", "L1");
69  TestLayout(VEC1(p1_32), 8, 32, "1 32 1 5 p1_32", "LLLL1RRR");
70  TestLayout(VEC1(p1_32), 8, 64, "1 64 1 5 p1_32", "LLLLLLLL1RRRRRRR");
71
72  TestLayout(VEC1(a1_1), 8, 32, "1 32 1 4 a1_1", "LLLL1RRR");
73  TestLayout(VEC1(a2_1), 8, 32, "1 32 2 4 a2_1", "LLLL2RRR");
74  TestLayout(VEC1(a3_1), 8, 32, "1 32 3 4 a3_1", "LLLL3RRR");
75  TestLayout(VEC1(a4_1), 8, 32, "1 32 4 4 a4_1", "LLLL4RRR");
76  TestLayout(VEC1(a7_1), 8, 32, "1 32 7 4 a7_1", "LLLL7RRR");
77  TestLayout(VEC1(a8_1), 8, 32, "1 32 8 4 a8_1", "LLLL0RRR");
78  TestLayout(VEC1(a9_1), 8, 32, "1 32 9 4 a9_1", "LLLL01RR");
79  TestLayout(VEC1(a16_1), 8, 32, "1 32 16 5 a16_1", "LLLL00RR");
80  TestLayout(VEC1(p1_256), 8, 32, "1 256 1 6 p1_256",
81             "LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL1RRR");
82  TestLayout(VEC1(a41_1), 8, 32, "1 32 41 5 a41_1", "LLLL000001RRRRRR");
83  TestLayout(VEC1(a105_1), 8, 32, "1 32 105 6 a105_1",
84             "LLLL00000000000001RRRRRR");
85
86  {
87    ASanStackVariableDescription t[] = {a1_1, p1_256};
88    TestLayout(VEC(t), 8, 32,
89               "2 256 1 6 p1_256 272 1 4 a1_1",
90               "LLLLLLLL" "LLLLLLLL" "LLLLLLLL" "LLLLLLLL" "1M1R");
91  }
92
93  {
94    ASanStackVariableDescription t[] = {a1_1, a16_1, a41_1};
95    TestLayout(VEC(t), 8, 32,
96               "3 32 1 4 a1_1 48 16 5 a16_1 80 41 5 a41_1",
97               "LLLL" "1M00" "MM00" "0001" "RRRR");
98  }
99#undef VEC1
100#undef VEC
101#undef VAR
102}
103