File: cert-msc32-c.c

package info (click to toggle)
llvm-toolchain-7 1%3A7.0.1-8
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 733,456 kB
  • sloc: cpp: 3,776,651; ansic: 633,271; asm: 350,301; python: 142,716; objc: 107,612; sh: 22,626; lisp: 11,056; perl: 7,999; pascal: 6,742; ml: 5,537; awk: 3,536; makefile: 2,557; cs: 2,027; xml: 841; ruby: 156
file content (27 lines) | stat: -rw-r--r-- 953 bytes parent folder | download | duplicates (12)
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
// RUN: %check_clang_tidy %s cert-msc32-c %t -- -config="{CheckOptions: [{key: cert-msc32-c.DisallowedSeedTypes, value: 'some_type,time_t'}]}" -- -std=c99

void srand(int seed);
typedef int time_t;
time_t time(time_t *t);

void f() {
  srand(1);
  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: random number generator seeded with a constant value will generate a predictable sequence of values [cert-msc32-c]

  const int a = 1;
  srand(a);
  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: random number generator seeded with a constant value will generate a predictable sequence of values [cert-msc32-c]

  time_t t;
  srand(time(&t)); // Disallowed seed type
  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: random number generator seeded with a disallowed source of seed value will generate a predictable sequence of values [cert-msc32-c]
}

void g() {
  typedef int user_t;
  user_t a = 1;
  srand(a);

  int b = 1;
  srand(b); // Can not evaluate as int
}