ext/pcntl: adding SIGTRAP handling for freebsd.

if a restricted file descriptor based syscall by the system had been attempted,
a SIGTRAP is raised with the syscall id.

close GH-14266

Author: devnexen

NEWS

@@ -146,6 +146,7 @@ PHP                                                                        NEWS
   . Added pcntl_getcpu for Linux/FreeBSD/Solaris/Illumos. (David Carlier)
   . Added pcntl_getqos_class/pcntl_setqos_class for macOs. (David Carlier)
   . Added SIGCKPT/SIGCKPTEXIT constants for DragonFlyBSD. (David Carlier)
+  . Added FreeBSD's SIGTRAP handling to pcntl_siginfo_to_zval. (David Carlier)
 
 - PCRE:
   . Upgrade bundled pcre2lib to version 10.43. (nielsdos)

ext/pcntl/pcntl.c

@@ -1067,6 +1067,20 @@ static void pcntl_siginfo_to_zval(int signo, siginfo_t *siginfo, zval *user_sigi
 				add_assoc_long_ex(user_siginfo, "fd",   sizeof("fd")-1,   siginfo->si_fd);
 # endif
 				break;
+#endif
+
+#ifdef SIGTRAP
+			case SIGTRAP:
+# if defined(si_syscall) && defined(__FreeBSD__)
+				if (siginfo->si_code == TRAP_CAP) {
+					add_assoc_long_ex(user_siginfo, "syscall", sizeof("syscall")-1, (zend_long)siginfo->si_syscall);
+				} else {
+					add_assoc_long_ex(user_siginfo, "trapno", sizeof("trapno")-1, (zend_long)siginfo->si_trapno);
+				}
+
+# endif
+				break;
+
 #endif
 		}
 #if defined(SIGRTMIN) && defined(SIGRTMAX)