File: null-deref-path-notes.c

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 (52 lines) | stat: -rw-r--r-- 3,168 bytes parent folder | download | duplicates (8)
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
// RUN: %clang_analyze_cc1 -w -x c -analyzer-checker=core,unix -analyzer-output=text -verify %s

// Avoid the crash when finding the expression for tracking the origins
// of the null pointer for path notes.
void pr34373() {
  int *a = 0; // expected-note{{'a' initialized to a null pointer value}}
  (a + 0)[0]; // expected-warning{{Array access results in a null pointer dereference}}
              // expected-note@-1{{Array access results in a null pointer dereference}}
}

typedef __typeof(sizeof(int)) size_t;
void *memcpy(void *dest, const void *src, unsigned long count);

void f1(char *source) {
  char *destination = 0; // expected-note{{'destination' initialized to a null pointer value}}
  memcpy(destination + 0, source, 10); // expected-warning{{Null pointer passed as 1st argument to memory copy function}}
                                       // expected-note@-1{{Null pointer passed as 1st argument to memory copy function}}
}

void f2(char *source) {
  char *destination = 0; // expected-note{{'destination' initialized to a null pointer value}}
  memcpy(destination - 0, source, 10); // expected-warning{{Null pointer passed as 1st argument to memory copy function}}
                                       // expected-note@-1{{Null pointer passed as 1st argument to memory copy function}}
}

void f3(char *source) {
  char *destination = 0; // expected-note{{'destination' initialized to a null pointer value}}
  destination = destination + 0; // expected-note{{Null pointer value stored to 'destination'}}
  memcpy(destination, source, 10); // expected-warning{{Null pointer passed as 1st argument to memory copy function}}
                                   // expected-note@-1{{Null pointer passed as 1st argument to memory copy function}}
}

void f4(char *source) {
  char *destination = 0; // expected-note{{'destination' initialized to a null pointer value}}
  destination = destination - 0; // expected-note{{Null pointer value stored to 'destination'}}
  memcpy(destination, source, 10); // expected-warning{{Null pointer passed as 1st argument to memory copy function}}
                                   // expected-note@-1{{Null pointer passed as 1st argument to memory copy function}}
}

void f5(char *source) {
  char *destination1 = 0; // expected-note{{'destination1' initialized to a null pointer value}}
  char *destination2 = destination1 + 0; // expected-note{{'destination2' initialized to a null pointer value}}
  memcpy(destination2, source, 10); // expected-warning{{Null pointer passed as 1st argument to memory copy function}}
                                    // expected-note@-1{{Null pointer passed as 1st argument to memory copy function}}
}

void f6(char *source) {
  char *destination1 = 0; // expected-note{{'destination1' initialized to a null pointer value}}
  char *destination2 = destination1 - 0; // expected-note{{'destination2' initialized to a null pointer value}}
  memcpy(destination2, source, 10); // expected-warning{{Null pointer passed as 1st argument to memory copy function}}
                                    // expected-note@-1{{Null pointer passed as 1st argument to memory copy function}}
}