v/vlib/builtin/builtin_nix.v

131 lines
3.4 KiB
V
Raw Normal View History

2019-11-13 09:05:06 +01:00
// Copyright (c) 2019 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
2019-12-31 08:53:53 +01:00
//pub fn vsyscall(id int
//
/*
pub const (
sys_write = 1
sys_mkdir = 83
)
const (
stdin_value = 0
stdout_value = 1
stderr_value = 2
)
fn C.puts(charptr)
*/
2020-01-05 20:13:35 +01:00
pub fn println(s string) {
2019-12-31 08:53:53 +01:00
$if linux {
2020-01-05 20:13:35 +01:00
$if !android {
snl := s + '\n'
C.syscall(/* sys_write */ 1, /* stdout_value */ 1, snl.str, s.len+1)
return
}
2019-12-31 08:53:53 +01:00
}
2020-01-05 20:13:35 +01:00
C.printf('%.*s\n', s.len, s.str)
2019-12-12 02:09:31 +01:00
}
2019-11-13 09:05:06 +01:00
fn print_backtrace_skipping_top_frames_msvc(skipframes int) bool {
println('not implemented, see builtin_windows.v')
return false
}
fn print_backtrace_skipping_top_frames_mingw(skipframes int) bool {
println('not implemented, see builtin_windows.v')
return false
}
fn print_backtrace_skipping_top_frames_nix(xskipframes int) bool {
skipframes := xskipframes + 2
2019-12-19 21:52:45 +01:00
$if macos {
return print_backtrace_skipping_top_frames_mac(skipframes)
}
$if linux {
return print_backtrace_skipping_top_frames_linux(skipframes)
}
$if freebsd {
return print_backtrace_skipping_top_frames_freebsd(skipframes)
}
2019-11-13 09:05:06 +01:00
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_mac(skipframes int) bool {
2019-12-03 14:29:24 +01:00
$if macos {
2019-12-19 21:52:45 +01:00
buffer := [100]byteptr
nr_ptrs := C.backtrace(*voidptr(buffer), 100)
C.backtrace_symbols_fd(*voidptr(&buffer[skipframes]), nr_ptrs - skipframes, 1)
2019-11-14 22:46:40 +01:00
}
2019-11-13 09:05:06 +01:00
return true
}
2019-11-25 11:54:56 +01:00
fn print_backtrace_skipping_top_frames_freebsd(skipframes int) bool {
$if freebsd {
2019-12-19 21:52:45 +01:00
buffer := [100]byteptr
nr_ptrs := C.backtrace(*voidptr(buffer), 100)
C.backtrace_symbols_fd(*voidptr(&buffer[skipframes]), nr_ptrs - skipframes, 1)
}
return true
2019-11-25 11:54:56 +01:00
}
2019-11-13 09:05:06 +01:00
fn print_backtrace_skipping_top_frames_linux(skipframes int) bool {
$if tinyc {
println('TODO: print_backtrace_skipping_top_frames_linux $skipframes with tcc fails tests with "stack smashing detected" .')
return false
}
2019-12-19 21:52:45 +01:00
$if !android {
// backtrace is not available on Android.
2019-11-13 09:05:06 +01:00
$if glibc {
buffer := [100]byteptr
nr_ptrs := C.backtrace(*voidptr(buffer), 100)
2019-12-19 21:52:45 +01:00
nr_actual_frames := nr_ptrs - skipframes
2019-11-13 09:05:06 +01:00
mut sframes := []string
2019-12-19 21:52:45 +01:00
csymbols := C.backtrace_symbols(*voidptr(&buffer[skipframes]), nr_actual_frames)
for i in 0 .. nr_actual_frames {
sframes << tos2(csymbols[i])
}
2019-11-13 09:05:06 +01:00
for sframe in sframes {
executable := sframe.all_before('(')
addr := sframe.all_after('[').all_before(']')
beforeaddr := sframe.all_before('[')
2019-11-13 09:05:06 +01:00
cmd := 'addr2line -e $executable $addr'
// taken from os, to avoid depending on the os module inside builtin.v
f := C.popen(cmd.str, 'r')
if isnil(f) {
2019-12-19 21:52:45 +01:00
println(sframe)
continue
2019-11-13 09:05:06 +01:00
}
buf := [1000]byte
mut output := ''
for C.fgets(voidptr(buf), 1000, f) != 0 {
output += tos(buf, vstrlen(buf))
}
2019-12-19 21:52:45 +01:00
output = output.trim_space() + ':'
2019-12-07 13:31:56 +01:00
if 0 != C.pclose(f) {
2019-12-19 21:52:45 +01:00
println(sframe)
continue
}
if output in ['??:0:', '??:?:'] {
output = ''
2019-11-13 09:05:06 +01:00
}
2019-12-19 21:52:45 +01:00
println('${output:-46s} | ${addr:14s} | $beforeaddr')
2019-11-13 09:05:06 +01:00
}
2019-12-19 21:52:45 +01:00
// C.backtrace_symbols_fd(*voidptr(&buffer[skipframes]), nr_actual_frames, 1)
2019-11-13 09:05:06 +01:00
return true
2019-12-19 21:52:45 +01:00
} $else {
2019-12-31 08:53:53 +01:00
println('backtrace_symbols_fd is missing, so printing backtraces is not available.\n')
println('Some libc implementations like musl simply do not provide it.')
2019-11-13 09:05:06 +01:00
}
}
return false
}
2019-12-19 21:52:45 +01:00