File: debug-exprinspection-istainted.c

package info (click to toggle)
llvm-toolchain-19 1%3A19.1.7-3
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,998,520 kB
  • sloc: cpp: 6,951,680; ansic: 1,486,157; asm: 913,598; python: 232,024; f90: 80,126; objc: 75,281; lisp: 37,276; pascal: 16,990; sh: 10,009; ml: 5,058; perl: 4,724; awk: 3,523; makefile: 3,167; javascript: 2,504; xml: 892; fortran: 664; cs: 573
file content (27 lines) | stat: -rw-r--r-- 1,004 bytes parent folder | download | duplicates (9) 
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: %clang_analyze_cc1 -verify %s \
// RUN:   -analyzer-checker=core \
// RUN:   -analyzer-checker=debug.ExprInspection \
// RUN:   -analyzer-checker=alpha.security.taint

int scanf(const char *restrict format, ...);
void clang_analyzer_isTainted(char);
void clang_analyzer_isTainted_any_suffix(char);
void clang_analyzer_isTainted_many_arguments(char, int, int);

void foo(void) {
  char buf[32] = "";
  clang_analyzer_isTainted(buf[0]);            // expected-warning {{NO}}
  clang_analyzer_isTainted_any_suffix(buf[0]); // expected-warning {{NO}}
  scanf("%s", buf);
  clang_analyzer_isTainted(buf[0]);            // expected-warning {{YES}}
  clang_analyzer_isTainted_any_suffix(buf[0]); // expected-warning {{YES}}

  int tainted_value = buf[0]; // no-warning
}

void exactly_one_argument_required(void) {
  char buf[32] = "";
  scanf("%s", buf);
  clang_analyzer_isTainted_many_arguments(buf[0], 42, 42);
  // expected-warning@-1 {{clang_analyzer_isTainted() requires exactly one argument}}
}