File: signal_trap_handler.cpp

package info (click to toggle)
llvm-toolchain-16 1%3A16.0.6-15~deb12u1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,634,792 kB
  • sloc: cpp: 6,179,261; ansic: 1,216,205; asm: 741,319; python: 196,614; objc: 75,325; f90: 49,640; lisp: 32,396; pascal: 12,286; sh: 9,394; perl: 7,442; ml: 5,494; awk: 3,523; makefile: 2,723; javascript: 1,206; xml: 886; fortran: 581; cs: 573
file content (39 lines) | stat: -rw-r--r-- 953 bytes parent folder | download | duplicates (15) 
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
 
// RUN: %clangxx -O1 %s -o %t && %env_tool_opts=handle_sigtrap=1 %run %t 2>&1 | FileCheck %s

// __builtin_debugtrap() does not raise SIGTRAP on these platforms.
// UNSUPPORTED: target=s390{{.*}}

#include <assert.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>

int in_handler;

void handler(int signo, siginfo_t *info, void *uctx) {
  fprintf(stderr, "in_handler: %d\n", in_handler);
  fflush(stderr);
  // CHECK: in_handler: 1
  _Exit(0);
}

int main() {
  struct sigaction a = {}, old = {};
  a.sa_sigaction = handler;
  a.sa_flags = SA_SIGINFO;
  sigaction(SIGTRAP, &a, &old);

  a = {};
  sigaction(SIGTRAP, 0, &a);
  assert(a.sa_sigaction == handler);
  assert(a.sa_flags & SA_SIGINFO);

  in_handler = 1;
  // Check that signal handler is not postponed by sanitizer.
  // Don't use raise here as it calls any signal handler immediately.
  __builtin_debugtrap();
  in_handler = 0;

  fprintf(stderr, "UNREACHABLE\n");
  return 1;
}