File: signal-handler-minimal.c

package info (click to toggle)
llvm-toolchain-19 1%3A19.1.7-3
  • links: PTS, VCS
  • area: main
  • in suites: 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 (34 lines) | stat: -rw-r--r-- 972 bytes parent folder | download | duplicates (17) 
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
 
// RUN: %check_clang_tidy %s bugprone-signal-handler %t \
// RUN: -config='{CheckOptions: \
// RUN:  {bugprone-signal-handler.AsyncSafeFunctionSet: "minimal"}}' \
// RUN: -- -isystem %clang_tidy_headers

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

void handler_bad1(int) {
  _exit(0);
  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: standard function '_exit' may not be asynchronous-safe; calling it from a signal handler may be dangerous [bugprone-signal-handler]
}

void handler_bad2(int) {
  void *dst;
  const void *src;
  memcpy(dst, src, 10);
  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: standard function 'memcpy' may not be asynchronous-safe; calling it from a signal handler may be dangerous [bugprone-signal-handler]
}

void handler_good(int) {
  abort();
  _Exit(0);
  quick_exit(0);
  signal(0, SIG_DFL);
}

void test(void) {
  signal(SIGINT, handler_bad1);
  signal(SIGINT, handler_bad2);
  signal(SIGINT, handler_good);
}