1 // RUN: %clang_analyze_cc1 -analyzer-checker=core,alpha.unix.Stream -analyzer-output text -verify %s
2
3 #include "Inputs/system-header-simulator.h"
4
check_note_at_correct_open()5 void check_note_at_correct_open() {
6 FILE *F1 = tmpfile(); // expected-note {{Stream opened here}}
7 if (!F1)
8 // expected-note@-1 {{'F1' is non-null}}
9 // expected-note@-2 {{Taking false branch}}
10 return;
11 FILE *F2 = tmpfile();
12 if (!F2) {
13 // expected-note@-1 {{'F2' is non-null}}
14 // expected-note@-2 {{Taking false branch}}
15 fclose(F1);
16 return;
17 }
18 rewind(F2);
19 fclose(F2);
20 rewind(F1);
21 }
22 // expected-warning@-1 {{Opened stream never closed. Potential resource leak}}
23 // expected-note@-2 {{Opened stream never closed. Potential resource leak}}
24
check_note_fopen()25 void check_note_fopen() {
26 FILE *F = fopen("file", "r"); // expected-note {{Stream opened here}}
27 if (!F)
28 // expected-note@-1 {{'F' is non-null}}
29 // expected-note@-2 {{Taking false branch}}
30 return;
31 }
32 // expected-warning@-1 {{Opened stream never closed. Potential resource leak}}
33 // expected-note@-2 {{Opened stream never closed. Potential resource leak}}
34
check_note_freopen()35 void check_note_freopen() {
36 FILE *F = fopen("file", "r"); // expected-note {{Stream opened here}}
37 if (!F)
38 // expected-note@-1 {{'F' is non-null}}
39 // expected-note@-2 {{Taking false branch}}
40 return;
41 F = freopen(0, "w", F); // expected-note {{Stream reopened here}}
42 if (!F)
43 // expected-note@-1 {{'F' is non-null}}
44 // expected-note@-2 {{Taking false branch}}
45 return;
46 }
47 // expected-warning@-1 {{Opened stream never closed. Potential resource leak}}
48 // expected-note@-2 {{Opened stream never closed. Potential resource leak}}
49
check_note_leak_2(int c)50 void check_note_leak_2(int c) {
51 FILE *F1 = fopen("foo1.c", "r"); // expected-note {{Stream opened here}}
52 if (!F1)
53 // expected-note@-1 {{'F1' is non-null}}
54 // expected-note@-2 {{Taking false branch}}
55 // expected-note@-3 {{'F1' is non-null}}
56 // expected-note@-4 {{Taking false branch}}
57 return;
58 FILE *F2 = fopen("foo2.c", "r"); // expected-note {{Stream opened here}}
59 if (!F2) {
60 // expected-note@-1 {{'F2' is non-null}}
61 // expected-note@-2 {{Taking false branch}}
62 // expected-note@-3 {{'F2' is non-null}}
63 // expected-note@-4 {{Taking false branch}}
64 fclose(F1);
65 return;
66 }
67 if (c)
68 // expected-note@-1 {{Assuming 'c' is not equal to 0}}
69 // expected-note@-2 {{Taking true branch}}
70 // expected-note@-3 {{Assuming 'c' is not equal to 0}}
71 // expected-note@-4 {{Taking true branch}}
72 return;
73 // expected-warning@-1 {{Opened stream never closed. Potential resource leak}}
74 // expected-note@-2 {{Opened stream never closed. Potential resource leak}}
75 // expected-warning@-3 {{Opened stream never closed. Potential resource leak}}
76 // expected-note@-4 {{Opened stream never closed. Potential resource leak}}
77 fclose(F1);
78 fclose(F2);
79 }
80