diff --git a/Zend/zend_gdb.c b/Zend/zend_gdb.c
index 0fff7420486ff..727a2bec227a8 100644
--- a/Zend/zend_gdb.c
+++ b/Zend/zend_gdb.c
@@ -22,6 +22,11 @@
 
 #include <sys/types.h>
 #include <sys/stat.h>
+#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__)
+#include <sys/sysctl.h>
+#include <sys/user.h>
+#include <sys/proc.h>
+#endif
 #include <fcntl.h>
 #include <unistd.h>
 
@@ -105,6 +110,7 @@ ZEND_API void zend_gdb_unregister_all(void)
 ZEND_API int zend_gdb_present(void)
 {
 	int ret = 0;
+#if defined(__linux__)
 	int fd = open("/proc/self/status", O_RDONLY);
 
 	if (fd > 0) {
@@ -136,6 +142,54 @@ ZEND_API int zend_gdb_present(void)
 
 		close(fd);
 	}
+#elif defined(__APPLE__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__)
+#if defined(__APPLE__)
+#define KINFO_MIB int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_PID, getpid()};
+#define KINFO_PROC_FLAG (cproc->kp_proc.p_flag)
+#define KINFO_PROC_PPID (cproc->kp_proc.p_oppid)
+#define KINFO_PROC_COMM (pcproc->kp_proc.p_comm)
+#elif defined(__FreeBSD__)
+#define KINFO_MIB int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_PID, getpid()};
+#define KINFO_PROC_FLAG (cproc->ki_flag)
+#define KINFO_PROC_PPID (cproc->ki_ppid)
+#define KINFO_PROC_COMM (pcproc->ki_comm)
+#elif defined(__OpenBSD__)
+#define P_TRACED PS_TRACED
+#define KINFO_MIB int mib[6] = {CTL_KERN, KERN_PROC, KERN_PROC_PID, getpid(), sizeof(struct kinfo_proc), 1};
+#define KINFO_PROC_FLAG (cproc->p_psflags)
+#define KINFO_PROC_PPID (cproc->p_ppid)
+#define KINFO_PROC_COMM (pcproc->p_comm)
+#elif defined(__NetBSD__)
+#define kinfo_proc kinfo_proc2
+#define KINFO_MIB int mib[6] = {CTL_KERN, KERN_PROC2, KERN_PROC_PID, getpid(), sizeof(struct kinfo_proc2), 1};
+#define KINFO_PROC_FLAG (cproc->p_flag)
+#define KINFO_PROC_PPID (cproc->p_ppid)
+#define KINFO_PROC_COMM (pcproc->p_comm)
+#endif
+	struct kinfo_proc *cproc;
+	size_t cproclen = 0;
+	KINFO_MIB
+	const size_t miblen = sizeof(mib)/sizeof(mib[0]);
+	if (sysctl(mib, miblen, NULL, &cproclen, NULL, 0) != 0) {
+		return 0;
+	}
+	cproc = (struct kinfo_proc *)malloc(cproclen);
+	if (sysctl(mib, 4, cproc, &cproclen, NULL, 0) == 0) {
+		if ((KINFO_PROC_FLAG & P_TRACED) != 0) {
+			pid_t ppid = KINFO_PROC_PPID;
+			mib[3] = ppid;
+			struct kinfo_proc *pcproc = (struct kinfo_proc *)malloc(cproclen);
+			if (sysctl(mib, miblen, pcproc, &cproclen, NULL, 0) == 0) {
+				// Could be prefixed with package systems e.g. egdb
+				if (strstr(KINFO_PROC_COMM, "gdb")) {
+					ret = 1;
+				}
+			}
+			free(pcproc);
+		}
+	}
+	free(cproc);
+#endif
 
 	return ret;
 }