From 97b83a49864fb80604979ae9160e758bbce21dea Mon Sep 17 00:00:00 2001
From: Bastian Buck <59334447+bstnbuck@users.noreply.github.com>
Date: Tue, 29 Jun 2021 14:00:48 +0200
Subject: [PATCH] os: add debugger_present() for linux (#10257)

---
 vlib/os/os_nix.c.v | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/vlib/os/os_nix.c.v b/vlib/os/os_nix.c.v
index f70cf623c8..07762358bb 100644
--- a/vlib/os/os_nix.c.v
+++ b/vlib/os/os_nix.c.v
@@ -6,6 +6,8 @@ import strings
 #include <unistd.h>
 #include <fcntl.h>
 #include <sys/utsname.h>
+#include <sys/types.h>
+#include <sys/ptrace.h>
 
 pub const (
 	path_separator = '/'
@@ -64,6 +66,8 @@ fn C.getgid() int
 
 fn C.getegid() int
 
+fn C.ptrace(u32, u32, voidptr, int) u64
+
 pub fn uname() Uname {
 	mut u := Uname{}
 	utsize := sizeof(C.utsname)
@@ -317,7 +321,15 @@ pub fn (mut f File) close() {
 	C.fclose(f.cfile)
 }
 
+[inline]
 pub fn debugger_present() bool {
+	// check if the parent could trace its process,
+	// if not a debugger must be present
+	$if linux {
+		return C.ptrace(C.PTRACE_TRACEME, 0, 1, 0) == -1
+	} $else $if macos {
+		return C.ptrace(C.PT_TRACE_ME, 0, voidptr(1), 0) == -1
+	}
 	return false
 }