1 files changed, 144 insertions, 0 deletions
diff --git a/v_windows/v/vlib/builtin/builtin_nix.c.v b/v_windows/v/vlib/builtin/builtin_nix.c.v
new file mode 100644
index 0000000..0d79af4
--- /dev/null
+++ b/v_windows/v/vlib/builtin/builtin_nix.c.v
@@ -0,0 +1,144 @@
+// Copyright (c) 2019-2021 Alexander Medvednikov. All rights reserved.
+// Use of this source code is governed by an MIT license
+// that can be found in the LICENSE file.
+module builtin
+
+// pub fn vsyscall(id int
+//
+
+/*
+pub const (
+	sys_write = 1
+	sys_mkdir = 83
+)
+const (
+	stdin_value = 0
+	stdout_value = 1
+	stderr_value  = 2
+)
+*/
+
+fn builtin_init() {
+	// Do nothing
+}
+
+fn print_backtrace_skipping_top_frames(xskipframes int) bool {
+	$if no_backtrace ? {
+		return false
+	} $else {
+		skipframes := xskipframes + 2
+		$if macos || freebsd || openbsd || netbsd {
+			return print_backtrace_skipping_top_frames_bsd(skipframes)
+		} $else $if linux {
+			return print_backtrace_skipping_top_frames_linux(skipframes)
+		} $else {
+			println('print_backtrace_skipping_top_frames is not implemented. skipframes: $skipframes')
+		}
+	}
+	return false
+}
+
+// the functions below are not called outside this file,
+// so there is no need to have their twins in builtin_windows.v
+fn print_backtrace_skipping_top_frames_bsd(skipframes int) bool {
+	$if no_backtrace ? {
+		return false
+	} $else {
+		$if macos || freebsd || openbsd || netbsd {
+			buffer := [100]voidptr{}
+			nr_ptrs := C.backtrace(&buffer[0], 100)
+			if nr_ptrs < 2 {
+				eprintln('C.backtrace returned less than 2 frames')
+				return false
+			}
+			C.backtrace_symbols_fd(&buffer[skipframes], nr_ptrs - skipframes, 2)
+		}
+		return true
+	}
+}
+
+fn C.tcc_backtrace(fmt &char) int
+fn print_backtrace_skipping_top_frames_linux(skipframes int) bool {
+	$if android {
+		eprintln('On Android no backtrace is available.')
+		return false
+	}
+	$if !glibc {
+		eprintln('backtrace_symbols is missing => printing backtraces is not available.')
+		eprintln('Some libc implementations like musl simply do not provide it.')
+		return false
+	}
+	$if no_backtrace ? {
+		return false
+	} $else {
+		$if linux && !freestanding {
+			$if tinyc {
+				C.tcc_backtrace(c'Backtrace')
+				return false
+			}
+			buffer := [100]voidptr{}
+			nr_ptrs := C.backtrace(&buffer[0], 100)
+			if nr_ptrs < 2 {
+				eprintln('C.backtrace returned less than 2 frames')
+				return false
+			}
+			nr_actual_frames := nr_ptrs - skipframes
+			mut sframes := []string{}
+			//////csymbols := backtrace_symbols(*voidptr(&buffer[skipframes]), nr_actual_frames)
+			csymbols := C.backtrace_symbols(voidptr(&buffer[skipframes]), nr_actual_frames)
+			for i in 0 .. nr_actual_frames {
+				sframes << unsafe { tos2(&byte(csymbols[i])) }
+			}
+			for sframe in sframes {
+				executable := sframe.all_before('(')
+				addr := sframe.all_after('[').all_before(']')
+				beforeaddr := sframe.all_before('[')
+				cmd := 'addr2line -e $executable $addr'
+				// taken from os, to avoid depending on the os module inside builtin.v
+				f := C.popen(&char(cmd.str), c'r')
+				if isnil(f) {
+					eprintln(sframe)
+					continue
+				}
+				buf := [1000]byte{}
+				mut output := ''
+				unsafe {
+					bp := &buf[0]
+					for C.fgets(&char(bp), 1000, f) != 0 {
+						output += tos(bp, vstrlen(bp))
+					}
+				}
+				output = output.trim_space() + ':'
+				if C.pclose(f) != 0 {
+					eprintln(sframe)
+					continue
+				}
+				if output in ['??:0:', '??:?:'] {
+					output = ''
+				}
+				// See http://wiki.dwarfstd.org/index.php?title=Path_Discriminators
+				// NB: it is shortened here to just d. , just so that it fits, and so
+				// that the common error file:lineno: line format is enforced.
+				output = output.replace(' (discriminator', ': (d.')
+				eprintln('${output:-55s} | ${addr:14s} | $beforeaddr')
+			}
+		}
+	}
+	return true
+}
+
+fn break_if_debugger_attached() {
+	unsafe {
+		mut ptr := &voidptr(0)
+		*ptr = voidptr(0)
+		_ = ptr
+	}
+}
+
+// These functions are Windows specific - provide dummys for *nix
+pub fn winapi_lasterr_str() string {
+	return ''
+}
+
+[noreturn]
+pub fn panic_lasterr() {}