File: bugprone-signal-handler-posix.c

package info (click to toggle)
llvm-toolchain-14 1%3A14.0.6-16
  • links: PTS, VCS
  • area: main
  • in suites: sid
  • size: 1,496,368 kB
  • sloc: cpp: 5,593,980; ansic: 986,873; asm: 585,869; python: 184,223; objc: 72,530; lisp: 31,119; f90: 27,793; javascript: 9,780; pascal: 9,762; sh: 9,482; perl: 7,468; ml: 5,432; awk: 3,523; makefile: 2,547; xml: 953; cs: 573; fortran: 567
file content (29 lines) | stat: -rw-r--r-- 742 bytes parent folder | download | duplicates (6) 
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
 
// RUN: %check_clang_tidy %s bugprone-signal-handler %t \
// RUN: -config='{CheckOptions: \
// RUN:  [{key: bugprone-signal-handler.AsyncSafeFunctionSet, value: "POSIX"}]}' \
// RUN: -- -isystem %S/Inputs/Headers

#include "signal.h"
#include "stdlib.h"
#include "stdio.h"
#include "string.h"
#include "unistd.h"

void handler_bad(int) {
  printf("1234");
  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: 'printf' may not be asynchronous-safe; calling it from a signal handler may be dangerous [bugprone-signal-handler]
}

void handler_good(int) {
  abort();
  _Exit(0);
  _exit(0);
  quick_exit(0);
  signal(0, SIG_DFL);
  memcpy((void*)10, (const void*)20, 1);
}

void test() {
  signal(SIGINT, handler_good);
  signal(SIGINT, handler_bad);
}