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
|
// RUN: %clang_cc1 -std=c++20 -Wunsafe-buffer-usage \
// RUN: -fsafe-buffer-usage-suggestions \
// RUN: -Wno-unused-value -verify %s
void basic(int * x) { // expected-warning{{'x' is an unsafe pointer used for buffer access}}
int *p1 = new int[10]; // not to warn
int *p2 = new int[10]; // expected-warning{{'p2' is an unsafe pointer used for buffer access}}
#pragma clang unsafe_buffer_usage begin
p1[5]; // not to warn
#define _INCLUDE_NO_WARN
#include "warn-unsafe-buffer-usage-pragma.h" // increment p1 in header
int *p3 = new int[10]; // expected-warning{{'p3' is an unsafe pointer used for buffer access}}
#pragma clang unsafe_buffer_usage end
p2[5]; //expected-note{{used in buffer access here}}
p3[5]; //expected-note{{used in buffer access here}}
x++; //expected-note{{used in pointer arithmetic here}}
#define _INCLUDE_WARN
#include "warn-unsafe-buffer-usage-pragma.h" // increment p2 in header
}
void withDiagnosticWarning() {
int *p1 = new int[10]; // not to warn
int *p2 = new int[10]; // expected-warning{{'p2' is an unsafe pointer used for buffer access}}
// diagnostics in opt-out region
#pragma clang unsafe_buffer_usage begin
p1[5]; // not to warn
p2[5]; // not to warn
#pragma clang diagnostic push
#pragma clang diagnostic warning "-Wunsafe-buffer-usage"
p1[5]; // not to warn
p2[5]; // not to warn
#pragma clang diagnostic warning "-Weverything"
p1[5]; // not to warn expected-warning{{expression result unused}}
p2[5]; // not to warn expected-warning{{expression result unused}}
#pragma clang diagnostic pop
#pragma clang unsafe_buffer_usage end
// opt-out region under diagnostic warning
#pragma clang diagnostic push
#pragma clang diagnostic warning "-Wunsafe-buffer-usage"
#pragma clang unsafe_buffer_usage begin
p1[5]; // not to warn
p2[5]; // not to warn
#pragma clang unsafe_buffer_usage end
#pragma clang diagnostic pop
p2[5]; // expected-note{{used in buffer access here}}
}
void withDiagnosticIgnore() {
int *p1 = new int[10]; // not to warn
int *p2 = new int[10]; // expected-warning{{'p2' is an unsafe pointer used for buffer access}}
int *p3 = new int[10]; // expected-warning{{'p3' is an unsafe pointer used for buffer access}}
#pragma clang unsafe_buffer_usage begin
p1[5]; // not to warn
p2[5]; // not to warn
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunsafe-buffer-usage"
p1[5]; // not to warn
p2[5]; // not to warn
#pragma clang diagnostic ignored "-Weverything"
p1[5]; // not to warn
p2[5]; // not to warn
#pragma clang diagnostic pop
#pragma clang unsafe_buffer_usage end
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunsafe-buffer-usage"
#pragma clang unsafe_buffer_usage begin
p1[5]; // not to warn
p2[5]; // not to warn
#pragma clang unsafe_buffer_usage end
#pragma clang diagnostic pop
p2[5]; // expected-note{{used in buffer access here}}
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunsafe-buffer-usage"
#pragma clang unsafe_buffer_usage begin
p1[5]; // not to warn
p2[5]; // not to warn
#pragma clang unsafe_buffer_usage end
p3[5]; // expected-note{{used in buffer access here}}
#pragma clang diagnostic pop
}
void noteGoesWithVarDeclWarning() {
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunsafe-buffer-usage"
int *p = new int[10]; // not to warn
#pragma clang diagnostic pop
p[5]; // not to note since the associated warning is suppressed
}
|
