File: memory-model.cpp

package info (click to toggle)
llvm-toolchain-13 1%3A13.0.1-11
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,418,840 kB
  • sloc: cpp: 5,290,826; ansic: 996,570; asm: 544,593; python: 188,212; objc: 72,027; lisp: 30,291; f90: 25,395; sh: 24,898; javascript: 9,780; pascal: 9,398; perl: 7,484; ml: 5,432; awk: 3,523; makefile: 2,913; xml: 953; cs: 573; fortran: 539
file content (157 lines) | stat: -rw-r--r-- 5,763 bytes parent folder | download | duplicates (7)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
// RUN: %clang_analyze_cc1 -std=c++20 \
// RUN:  -analyzer-checker=core,unix,cplusplus,debug.ExprInspection \
// RUN:  -triple x86_64-unknown-linux-gnu \
// RUN:  -verify %s

#include "Inputs/system-header-simulator-cxx.h"

typedef __SIZE_TYPE__ size_t;
void *malloc(size_t);
void *alloca(size_t);
void *realloc(void *ptr, size_t size);
void *calloc(size_t number, size_t size);
void free(void *);

struct S {
  int f;
};

void clang_analyzer_dump(int);
void clang_analyzer_dump(const void *);
void clang_analyzer_dumpExtent(int);
void clang_analyzer_dumpExtent(const void *);
void clang_analyzer_dumpElementCount(int);
void clang_analyzer_dumpElementCount(const void *);

int clang_analyzer_getExtent(void *);
void clang_analyzer_eval(bool);

void var_simple_ref() {
  int a = 13;
  clang_analyzer_dump(&a);             // expected-warning {{a}}
  clang_analyzer_dumpExtent(&a);       // expected-warning {{4 S64b}}
  clang_analyzer_dumpElementCount(&a); // expected-warning {{1 S64b}}
}

void var_simple_ptr(int *a) {
  clang_analyzer_dump(a);             // expected-warning {{SymRegion{reg_$0<int * a>}}}
  clang_analyzer_dumpExtent(a);       // expected-warning {{extent_$1{SymRegion{reg_$0<int * a>}}}}
  clang_analyzer_dumpElementCount(a); // expected-warning {{(extent_$1{SymRegion{reg_$0<int * a>}}) / 4}}
}

void var_array() {
  int a[] = {1, 2, 3};
  clang_analyzer_dump(a);             // expected-warning {{Element{a,0 S64b,int}}}
  clang_analyzer_dumpExtent(a);       // expected-warning {{12 S64b}}
  clang_analyzer_dumpElementCount(a); // expected-warning {{3 S64b}}
}

void string() {
  clang_analyzer_dump("foo");             // expected-warning {{Element{"foo",0 S64b,char}}}
  clang_analyzer_dumpExtent("foo");       // expected-warning {{4 S64b}}
  clang_analyzer_dumpElementCount("foo"); // expected-warning {{4 S64b}}
}

void struct_simple_ptr(S *a) {
  clang_analyzer_dump(a);             // expected-warning {{SymRegion{reg_$0<struct S * a>}}}
  clang_analyzer_dumpExtent(a);       // expected-warning {{extent_$1{SymRegion{reg_$0<struct S * a>}}}}
  clang_analyzer_dumpElementCount(a); // expected-warning {{(extent_$1{SymRegion{reg_$0<struct S * a>}}) / 4}}
}

void field_ref(S a) {
  clang_analyzer_dump(&a.f);             // expected-warning {{a.f}}
  clang_analyzer_dumpExtent(&a.f);       // expected-warning {{4 S64b}}
  clang_analyzer_dumpElementCount(&a.f); // expected-warning {{1 S64b}}
}

void field_ptr(S *a) {
  clang_analyzer_dump(&a->f);             // expected-warning {{SymRegion{reg_$0<struct S * a>}.f}}
  clang_analyzer_dumpExtent(&a->f);       // expected-warning {{4 S64b}}
  clang_analyzer_dumpElementCount(&a->f); // expected-warning {{1 S64b}}
}

void symbolic_array() {
  int *a = new int[3];
  clang_analyzer_dump(a);             // expected-warning {{Element{HeapSymRegion{conj}}
  clang_analyzer_dumpExtent(a);       // expected-warning {{12 S64b}}
  clang_analyzer_dumpElementCount(a); // expected-warning {{3 S64b}}
  delete[] a;
}

void symbolic_placement_new() {
  char *buf = new char[sizeof(int) * 3];
  int *a = new (buf) int(12);
  clang_analyzer_dump(a);             // expected-warning {{Element{HeapSymRegion{conj}}
  clang_analyzer_dumpExtent(a);       // expected-warning {{12 S64b}}
  clang_analyzer_dumpElementCount(a); // expected-warning {{3 S64b}}
  delete[] buf;
}

void symbolic_malloc() {
  int *a = (int *)malloc(12);
  clang_analyzer_dump(a);             // expected-warning {{Element{HeapSymRegion{conj}}
  clang_analyzer_dumpExtent(a);       // expected-warning {{12 U64b}}
  clang_analyzer_dumpElementCount(a); // expected-warning {{3 S64b}}
  free(a);
}

void symbolic_alloca() {
  int *a = (int *)alloca(12);
  clang_analyzer_dump(a);             // expected-warning {{Element{HeapSymRegion{conj}}
  clang_analyzer_dumpExtent(a);       // expected-warning {{12 U64b}}
  clang_analyzer_dumpElementCount(a); // expected-warning {{3 S64b}}
}

void symbolic_complex() {
  int *a = (int *)malloc(4);
  clang_analyzer_dumpExtent(a);       // expected-warning {{4 U64b}}
  clang_analyzer_dumpElementCount(a); // expected-warning {{1 S64b}}

  int *b = (int *)realloc(a, sizeof(int) * 2);
  clang_analyzer_dumpExtent(b);       // expected-warning {{8 U64b}}
  clang_analyzer_dumpElementCount(b); // expected-warning {{2 S64b}}
  free(b);

  int *c = (int *)calloc(3, 4);
  clang_analyzer_dumpExtent(c);       // expected-warning {{12 U64b}}
  clang_analyzer_dumpElementCount(c); // expected-warning {{3 S64b}}
  free(c);
}

void signedness_equality() {
  char *a = new char[sizeof(char) * 13];
  char *b = (char *)malloc(13);

  clang_analyzer_dump(clang_analyzer_getExtent(a)); // expected-warning {{13 S64b}}
  clang_analyzer_dump(clang_analyzer_getExtent(b)); // expected-warning {{13 U64b}}
  clang_analyzer_eval(clang_analyzer_getExtent(a) ==
                      clang_analyzer_getExtent(b));
  // expected-warning@-2 {{TRUE}}

  delete[] a;
  free(b);
}

void default_new_aligned() {
  struct alignas(32) S {};

  S *a = new S[10];

  clang_analyzer_dump(a);             // expected-warning {{Element{HeapSymRegion{conj}}
  clang_analyzer_dumpExtent(a);       // expected-warning {{320 S64b}}
  clang_analyzer_dumpElementCount(a); // expected-warning {{10 S64b}}

  delete[] a;
}

void *operator new[](std::size_t, std::align_val_t, bool hack) throw();

void user_defined_new() {
  int *a = new (std::align_val_t(32), true) int[10];

  clang_analyzer_dump(a);             // expected-warning {{Element{SymRegion{conj}}
  clang_analyzer_dumpExtent(a);       // expected-warning-re {{{{^extent_\$[0-9]\{SymRegion{conj}}}}
  clang_analyzer_dumpElementCount(a); // expected-warning-re {{{{^\(extent_\$[0-9]\{SymRegion{conj.*\) / 4}}}}

  operator delete[](a, std::align_val_t(32));
}