2021-11-16 20:31:42 +03:00
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[has_globals]
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2020-12-15 10:41:02 +03:00
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module builtin
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2020-12-18 20:31:00 +03:00
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type FnExitCb = fn ()
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2020-12-15 10:41:02 +03:00
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fn C.atexit(f FnExitCb) int
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2021-07-25 01:13:34 +03:00
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fn C.strerror(int) &char
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2020-12-15 10:41:02 +03:00
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2021-07-04 20:24:19 +03:00
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[noreturn]
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fn vhalt() {
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for {}
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}
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2020-12-18 20:31:00 +03:00
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// exit terminates execution immediately and returns exit `code` to the shell.
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2021-07-04 20:24:19 +03:00
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[noreturn]
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2020-12-15 10:41:02 +03:00
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pub fn exit(code int) {
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C.exit(code)
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}
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2021-04-15 11:43:38 +03:00
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fn vcommithash() string {
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return unsafe { tos5(&char(C.V_CURRENT_COMMIT_HASH)) }
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}
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2020-12-18 20:31:00 +03:00
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// panic_debug private function that V uses for panics, -cg/-g is passed
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2020-12-15 10:41:02 +03:00
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// recent versions of tcc print nicer backtraces automatically
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2022-03-06 20:01:22 +03:00
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// Note: the duplication here is because tcc_backtrace should be called directly
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2020-12-15 10:41:02 +03:00
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// inside the panic functions.
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2021-07-04 20:24:19 +03:00
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[noreturn]
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2020-12-15 10:41:02 +03:00
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fn panic_debug(line_no int, file string, mod string, fn_name string, s string) {
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2022-03-06 20:01:22 +03:00
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// Note: the order here is important for a stabler test output
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2020-12-15 10:41:02 +03:00
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// module is less likely to change than function, etc...
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// During edits, the line number will change most frequently,
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// so it is last
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2021-04-17 02:38:41 +03:00
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$if freestanding {
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bare_panic(s)
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} $else {
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2021-04-14 08:50:50 +03:00
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eprintln('================ V panic ================')
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eprintln(' module: $mod')
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eprintln(' function: ${fn_name}()')
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eprintln(' message: $s')
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eprintln(' file: $file:$line_no')
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2021-04-15 11:43:38 +03:00
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eprintln(' v hash: $vcommithash()')
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2021-04-14 08:50:50 +03:00
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eprintln('=========================================')
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2021-04-17 02:38:41 +03:00
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$if exit_after_panic_message ? {
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2020-12-15 10:41:02 +03:00
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C.exit(1)
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2021-05-23 12:37:23 +03:00
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} $else $if no_backtrace ? {
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C.exit(1)
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2020-12-15 10:41:02 +03:00
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} $else {
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2021-05-23 12:37:23 +03:00
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$if tinyc {
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2020-12-15 10:41:02 +03:00
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$if panics_break_into_debugger ? {
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break_if_debugger_attached()
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2021-05-23 12:37:23 +03:00
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} $else {
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C.tcc_backtrace(c'Backtrace')
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2020-12-15 10:41:02 +03:00
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}
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C.exit(1)
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}
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2021-05-23 12:37:23 +03:00
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print_backtrace_skipping_top_frames(1)
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$if panics_break_into_debugger ? {
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break_if_debugger_attached()
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}
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C.exit(1)
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2020-12-15 10:41:02 +03:00
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}
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}
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2021-07-04 20:24:19 +03:00
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vhalt()
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2020-12-15 10:41:02 +03:00
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}
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2021-07-04 20:24:19 +03:00
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[noreturn]
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2021-03-24 14:16:36 +03:00
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pub fn panic_optional_not_set(s string) {
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panic('optional not set ($s)')
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}
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2020-12-15 10:41:02 +03:00
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// panic prints a nice error message, then exits the process with exit code of 1.
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// It also shows a backtrace on most platforms.
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2021-07-04 20:24:19 +03:00
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[noreturn]
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2020-12-15 10:41:02 +03:00
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pub fn panic(s string) {
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2021-04-17 02:38:41 +03:00
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$if freestanding {
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bare_panic(s)
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2020-12-15 10:41:02 +03:00
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} $else {
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2021-04-17 02:38:41 +03:00
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eprint('V panic: ')
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eprintln(s)
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eprintln('v hash: $vcommithash()')
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$if exit_after_panic_message ? {
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2020-12-15 10:41:02 +03:00
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C.exit(1)
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2021-05-23 12:37:23 +03:00
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} $else $if no_backtrace ? {
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C.exit(1)
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2020-12-15 10:41:02 +03:00
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} $else {
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2021-05-23 12:37:23 +03:00
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$if tinyc {
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2020-12-15 10:41:02 +03:00
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$if panics_break_into_debugger ? {
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break_if_debugger_attached()
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2021-05-23 12:37:23 +03:00
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} $else {
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C.tcc_backtrace(c'Backtrace')
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2020-12-15 10:41:02 +03:00
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}
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C.exit(1)
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}
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2021-05-23 12:37:23 +03:00
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print_backtrace_skipping_top_frames(1)
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$if panics_break_into_debugger ? {
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break_if_debugger_attached()
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}
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C.exit(1)
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2020-12-15 10:41:02 +03:00
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}
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}
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2021-07-04 20:24:19 +03:00
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vhalt()
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2020-12-15 10:41:02 +03:00
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}
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2021-07-25 01:13:34 +03:00
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// return a C-API error message matching to `errnum`
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pub fn c_error_number_str(errnum int) string {
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mut err_msg := ''
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$if freestanding {
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err_msg = 'error $errnum'
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} $else {
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2021-07-25 22:16:11 +03:00
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$if !vinix {
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c_msg := C.strerror(errnum)
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err_msg = string{
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str: &byte(c_msg)
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len: unsafe { C.strlen(c_msg) }
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is_lit: 1
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}
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2021-07-25 01:13:34 +03:00
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}
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}
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return err_msg
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}
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// panic with a C-API error message matching `errnum`
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[noreturn]
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pub fn panic_error_number(basestr string, errnum int) {
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panic(basestr + c_error_number_str(errnum))
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}
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2020-12-15 10:41:02 +03:00
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// eprintln prints a message with a line end, to stderr. Both stderr and stdout are flushed.
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pub fn eprintln(s string) {
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2021-06-23 09:37:00 +03:00
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if s.str == 0 {
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eprintln('eprintln(NIL)')
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return
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}
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2021-04-14 08:50:50 +03:00
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$if freestanding {
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// flushing is only a thing with C.FILE from stdio.h, not on the syscall level
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2021-06-23 09:37:00 +03:00
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bare_eprint(s.str, u64(s.len))
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bare_eprint(c'\n', 1)
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2021-04-10 17:40:43 +03:00
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} $else $if ios {
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2021-06-23 09:37:00 +03:00
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C.WrappedNSLog(s.str)
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2021-03-05 20:12:42 +03:00
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} $else {
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2021-04-14 08:50:50 +03:00
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C.fflush(C.stdout)
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C.fflush(C.stderr)
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// eprintln is used in panics, so it should not fail at all
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$if android {
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2021-06-23 09:37:00 +03:00
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C.fprintf(C.stderr, c'%.*s\n', s.len, s.str)
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2021-03-05 20:12:42 +03:00
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}
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2021-06-23 09:37:00 +03:00
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_writeln_to_fd(2, s)
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2021-04-14 08:50:50 +03:00
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C.fflush(C.stderr)
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2020-12-15 10:41:02 +03:00
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}
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}
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// eprint prints a message to stderr. Both stderr and stdout are flushed.
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pub fn eprint(s string) {
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2021-06-23 09:37:00 +03:00
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if s.str == 0 {
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eprint('eprint(NIL)')
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return
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}
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2021-04-14 08:50:50 +03:00
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$if freestanding {
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// flushing is only a thing with C.FILE from stdio.h, not on the syscall level
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2021-06-23 09:37:00 +03:00
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bare_eprint(s.str, u64(s.len))
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2021-04-10 17:40:43 +03:00
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} $else $if ios {
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// TODO: Implement a buffer as NSLog doesn't have a "print"
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2021-06-23 09:37:00 +03:00
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C.WrappedNSLog(s.str)
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2021-03-05 20:12:42 +03:00
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} $else {
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2021-04-14 08:50:50 +03:00
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C.fflush(C.stdout)
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C.fflush(C.stderr)
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$if android {
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2021-06-23 09:37:00 +03:00
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C.fprintf(C.stderr, c'%.*s', s.len, s.str)
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2021-03-05 20:12:42 +03:00
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}
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2021-06-23 09:37:00 +03:00
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_write_buf_to_fd(2, s.str, s.len)
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2021-04-14 08:50:50 +03:00
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C.fflush(C.stderr)
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2021-01-14 12:41:52 +03:00
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}
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2020-12-15 10:41:02 +03:00
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}
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2021-12-16 16:59:46 +03:00
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pub fn flush_stdout() {
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$if freestanding {
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not_implemented := 'flush_stdout is not implemented\n'
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bare_eprint(not_implemented.str, u64(not_implemented.len))
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} $else {
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C.fflush(C.stdout)
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}
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}
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pub fn flush_stderr() {
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$if freestanding {
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not_implemented := 'flush_stderr is not implemented\n'
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bare_eprint(not_implemented.str, u64(not_implemented.len))
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} $else {
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C.fflush(C.stderr)
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}
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}
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2020-12-18 20:31:00 +03:00
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// print prints a message to stdout. Unlike `println` stdout is not automatically flushed.
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2021-06-23 09:37:00 +03:00
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[manualfree]
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2020-12-15 10:41:02 +03:00
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pub fn print(s string) {
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2021-06-23 09:37:00 +03:00
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$if android {
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2021-06-28 08:27:12 +03:00
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C.fprintf(C.stdout, c'%.*s', s.len, s.str) // logcat
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}
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// no else if for android termux support
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$if ios {
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2021-04-10 17:40:43 +03:00
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// TODO: Implement a buffer as NSLog doesn't have a "print"
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C.WrappedNSLog(s.str)
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2021-04-14 08:50:50 +03:00
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} $else $if freestanding {
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bare_print(s.str, u64(s.len))
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2021-03-05 20:12:42 +03:00
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} $else {
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2021-06-23 09:37:00 +03:00
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_write_buf_to_fd(1, s.str, s.len)
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2021-03-05 20:12:42 +03:00
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}
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2020-12-15 10:41:02 +03:00
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}
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2020-12-18 20:31:00 +03:00
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// println prints a message with a line end, to stdout. stdout is flushed.
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2021-06-23 09:37:00 +03:00
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[manualfree]
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2020-12-15 10:41:02 +03:00
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pub fn println(s string) {
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2021-04-04 18:13:25 +03:00
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if s.str == 0 {
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2021-06-23 09:37:00 +03:00
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println('println(NIL)')
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2021-04-04 18:13:25 +03:00
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return
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}
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2021-06-28 08:27:12 +03:00
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$if android {
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C.fprintf(C.stdout, c'%.*s\n', s.len, s.str) // logcat
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return
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}
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// no else if for android termux support
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2021-06-23 09:37:00 +03:00
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$if ios {
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2021-04-10 17:40:43 +03:00
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C.WrappedNSLog(s.str)
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2021-06-23 09:37:00 +03:00
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return
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2021-04-14 08:50:50 +03:00
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} $else $if freestanding {
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bare_print(s.str, u64(s.len))
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bare_print(c'\n', 1)
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2021-06-23 09:37:00 +03:00
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return
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2021-04-04 18:13:25 +03:00
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} $else {
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2021-06-23 09:37:00 +03:00
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_writeln_to_fd(1, s)
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}
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}
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[manualfree]
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fn _writeln_to_fd(fd int, s string) {
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unsafe {
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buf_len := s.len + 1 // space for \n
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mut buf := malloc(buf_len)
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defer {
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free(buf)
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}
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C.memcpy(buf, s.str, s.len)
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buf[s.len] = `\n`
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_write_buf_to_fd(fd, buf, buf_len)
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}
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}
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[manualfree]
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fn _write_buf_to_fd(fd int, buf &byte, buf_len int) {
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if buf_len <= 0 {
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return
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}
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unsafe {
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mut ptr := buf
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mut remaining_bytes := buf_len
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for remaining_bytes > 0 {
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x := C.write(fd, ptr, remaining_bytes)
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ptr += x
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remaining_bytes -= x
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}
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2020-12-15 10:41:02 +03:00
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}
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}
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2021-05-19 10:35:56 +03:00
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__global total_m = i64(0)
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2020-12-18 20:31:00 +03:00
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// malloc dynamically allocates a `n` bytes block of memory on the heap.
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// malloc returns a `byteptr` pointing to the memory address of the allocated space.
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// unlike the `calloc` family of functions - malloc will not zero the memory block.
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2020-12-15 10:41:02 +03:00
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[unsafe]
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2021-04-04 17:43:32 +03:00
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pub fn malloc(n int) &byte {
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2020-12-15 10:41:02 +03:00
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if n <= 0 {
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2021-10-03 20:27:46 +03:00
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panic('malloc($n <= 0)')
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2021-01-14 12:41:52 +03:00
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}
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$if vplayground ? {
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if n > 10000 {
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2021-06-08 16:51:32 +03:00
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panic('allocating more than 10 KB at once is not allowed in the V playground')
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}
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if total_m > 50 * 1024 * 1024 {
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panic('allocating more than 50 MB is not allowed in the V playground')
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2021-01-14 12:41:52 +03:00
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}
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}
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$if trace_malloc ? {
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total_m += n
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2021-07-21 11:46:04 +03:00
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C.fprintf(C.stderr, c'_v_malloc %6d total %10d\n', n, total_m)
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2021-01-14 12:41:52 +03:00
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// print_backtrace()
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2020-12-15 10:41:02 +03:00
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|
}
|
2021-04-04 17:43:32 +03:00
|
|
|
mut res := &byte(0)
|
2020-12-15 10:41:02 +03:00
|
|
|
$if prealloc {
|
2021-05-23 12:37:23 +03:00
|
|
|
return unsafe { prealloc_malloc(n) }
|
2021-05-19 10:35:56 +03:00
|
|
|
} $else $if gcboehm ? {
|
2020-12-15 10:41:02 +03:00
|
|
|
unsafe {
|
2021-05-19 10:35:56 +03:00
|
|
|
res = C.GC_MALLOC(n)
|
2020-12-15 10:41:02 +03:00
|
|
|
}
|
2021-05-19 10:35:56 +03:00
|
|
|
} $else $if freestanding {
|
2022-01-06 15:10:37 +03:00
|
|
|
// todo: is this safe to call malloc there? We export __malloc as malloc and it uses dlmalloc behind the scenes
|
|
|
|
// so theoretically it is safe
|
|
|
|
res = unsafe { __malloc(usize(n)) }
|
2021-05-19 10:35:56 +03:00
|
|
|
} $else {
|
|
|
|
res = unsafe { C.malloc(n) }
|
|
|
|
}
|
|
|
|
if res == 0 {
|
|
|
|
panic('malloc($n) failed')
|
2020-12-15 10:41:02 +03:00
|
|
|
}
|
2021-03-14 19:29:00 +03:00
|
|
|
$if debug_malloc ? {
|
2021-11-28 20:23:11 +03:00
|
|
|
// Fill in the memory with something != 0 i.e. `M`, so it is easier to spot
|
2021-03-14 19:29:00 +03:00
|
|
|
// when the calling code wrongly relies on it being zeroed.
|
2021-11-28 20:23:11 +03:00
|
|
|
unsafe { C.memset(res, 0x4D, n) }
|
2021-03-14 19:29:00 +03:00
|
|
|
}
|
2021-01-14 12:41:52 +03:00
|
|
|
return res
|
2020-12-15 10:41:02 +03:00
|
|
|
}
|
|
|
|
|
2021-06-12 11:27:08 +03:00
|
|
|
[unsafe]
|
|
|
|
pub fn malloc_noscan(n int) &byte {
|
|
|
|
if n <= 0 {
|
2021-10-03 20:27:46 +03:00
|
|
|
panic('malloc_noscan($n <= 0)')
|
2021-06-12 11:27:08 +03:00
|
|
|
}
|
|
|
|
$if vplayground ? {
|
|
|
|
if n > 10000 {
|
|
|
|
panic('allocating more than 10 KB at once is not allowed in the V playground')
|
|
|
|
}
|
|
|
|
if total_m > 50 * 1024 * 1024 {
|
|
|
|
panic('allocating more than 50 MB is not allowed in the V playground')
|
|
|
|
}
|
|
|
|
}
|
|
|
|
$if trace_malloc ? {
|
|
|
|
total_m += n
|
2021-07-21 11:46:04 +03:00
|
|
|
C.fprintf(C.stderr, c'_v_malloc %6d total %10d\n', n, total_m)
|
2021-06-12 11:27:08 +03:00
|
|
|
// print_backtrace()
|
|
|
|
}
|
|
|
|
mut res := &byte(0)
|
|
|
|
$if prealloc {
|
|
|
|
return unsafe { prealloc_malloc(n) }
|
|
|
|
} $else $if gcboehm ? {
|
|
|
|
$if gcboehm_opt ? {
|
|
|
|
unsafe {
|
|
|
|
res = C.GC_MALLOC_ATOMIC(n)
|
|
|
|
}
|
|
|
|
} $else {
|
|
|
|
unsafe {
|
|
|
|
res = C.GC_MALLOC(n)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
} $else $if freestanding {
|
2022-01-06 15:10:37 +03:00
|
|
|
res = unsafe { __malloc(usize(n)) }
|
2021-06-12 11:27:08 +03:00
|
|
|
} $else {
|
|
|
|
res = unsafe { C.malloc(n) }
|
|
|
|
}
|
|
|
|
if res == 0 {
|
2021-10-03 20:27:46 +03:00
|
|
|
panic('malloc_noscan($n) failed')
|
2021-06-12 11:27:08 +03:00
|
|
|
}
|
|
|
|
$if debug_malloc ? {
|
2021-11-28 20:23:11 +03:00
|
|
|
// Fill in the memory with something != 0 i.e. `M`, so it is easier to spot
|
2021-06-12 11:27:08 +03:00
|
|
|
// when the calling code wrongly relies on it being zeroed.
|
2021-11-28 20:23:11 +03:00
|
|
|
unsafe { C.memset(res, 0x4D, n) }
|
2021-06-12 11:27:08 +03:00
|
|
|
}
|
|
|
|
return res
|
|
|
|
}
|
|
|
|
|
2020-12-18 20:31:00 +03:00
|
|
|
// v_realloc resizes the memory block `b` with `n` bytes.
|
2021-01-14 12:41:52 +03:00
|
|
|
// The `b byteptr` must be a pointer to an existing memory block
|
|
|
|
// previously allocated with `malloc`, `v_calloc` or `vcalloc`.
|
2021-03-14 19:29:00 +03:00
|
|
|
// Please, see also realloc_data, and use it instead if possible.
|
2020-12-15 10:41:02 +03:00
|
|
|
[unsafe]
|
2021-04-04 17:43:32 +03:00
|
|
|
pub fn v_realloc(b &byte, n int) &byte {
|
2021-06-08 16:51:32 +03:00
|
|
|
$if trace_realloc ? {
|
2021-06-08 18:34:15 +03:00
|
|
|
C.fprintf(C.stderr, c'v_realloc %6d\n', n)
|
2021-06-08 16:51:32 +03:00
|
|
|
}
|
2021-04-04 17:43:32 +03:00
|
|
|
mut new_ptr := &byte(0)
|
2020-12-15 10:41:02 +03:00
|
|
|
$if prealloc {
|
|
|
|
unsafe {
|
2021-01-14 12:41:52 +03:00
|
|
|
new_ptr = malloc(n)
|
|
|
|
C.memcpy(new_ptr, b, n)
|
2020-12-15 10:41:02 +03:00
|
|
|
}
|
2021-05-23 12:37:23 +03:00
|
|
|
return new_ptr
|
|
|
|
} $else $if gcboehm ? {
|
|
|
|
new_ptr = unsafe { C.GC_REALLOC(b, n) }
|
2020-12-15 10:41:02 +03:00
|
|
|
} $else {
|
2021-05-23 12:37:23 +03:00
|
|
|
new_ptr = unsafe { C.realloc(b, n) }
|
|
|
|
}
|
|
|
|
if new_ptr == 0 {
|
|
|
|
panic('realloc($n) failed')
|
2020-12-15 10:41:02 +03:00
|
|
|
}
|
2021-01-14 12:41:52 +03:00
|
|
|
return new_ptr
|
2020-12-15 10:41:02 +03:00
|
|
|
}
|
|
|
|
|
2021-03-14 15:54:35 +03:00
|
|
|
// realloc_data resizes the memory block pointed by `old_data` to `new_size`
|
|
|
|
// bytes. `old_data` must be a pointer to an existing memory block, previously
|
|
|
|
// allocated with `malloc`, `v_calloc` or `vcalloc`, of size `old_data`.
|
|
|
|
// realloc_data returns a pointer to the new location of the block.
|
2022-03-06 20:01:22 +03:00
|
|
|
// Note: if you know the old data size, it is preferable to call `realloc_data`,
|
2021-03-14 15:54:35 +03:00
|
|
|
// instead of `v_realloc`, at least during development, because `realloc_data`
|
|
|
|
// can make debugging easier, when you compile your program with
|
|
|
|
// `-d debug_realloc`.
|
|
|
|
[unsafe]
|
2021-04-04 17:43:32 +03:00
|
|
|
pub fn realloc_data(old_data &byte, old_size int, new_size int) &byte {
|
2021-06-08 16:51:32 +03:00
|
|
|
$if trace_realloc ? {
|
|
|
|
C.fprintf(C.stderr, c'realloc_data old_size: %6d new_size: %6d\n', old_size, new_size)
|
|
|
|
}
|
2021-03-14 15:54:35 +03:00
|
|
|
$if prealloc {
|
2021-05-19 10:35:56 +03:00
|
|
|
return unsafe { prealloc_realloc(old_data, old_size, new_size) }
|
2021-03-14 15:54:35 +03:00
|
|
|
}
|
|
|
|
$if debug_realloc ? {
|
2022-03-06 20:01:22 +03:00
|
|
|
// Note: this is slower, but helps debugging memory problems.
|
2021-03-14 15:54:35 +03:00
|
|
|
// The main idea is to always force reallocating:
|
|
|
|
// 1) allocate a new memory block
|
|
|
|
// 2) copy the old to the new
|
|
|
|
// 3) fill the old with 0x57 (`W`)
|
|
|
|
// 4) free the old block
|
|
|
|
// => if there is still a pointer to the old block somewhere
|
|
|
|
// it will point to memory that is now filled with 0x57.
|
|
|
|
unsafe {
|
|
|
|
new_ptr := malloc(new_size)
|
2021-03-14 17:12:18 +03:00
|
|
|
min_size := if old_size < new_size { old_size } else { new_size }
|
|
|
|
C.memcpy(new_ptr, old_data, min_size)
|
2021-03-14 15:54:35 +03:00
|
|
|
C.memset(old_data, 0x57, old_size)
|
2021-03-20 16:16:36 +03:00
|
|
|
free(old_data)
|
2021-03-14 15:54:35 +03:00
|
|
|
return new_ptr
|
|
|
|
}
|
|
|
|
}
|
2021-04-04 17:43:32 +03:00
|
|
|
mut nptr := &byte(0)
|
2021-03-20 16:16:36 +03:00
|
|
|
$if gcboehm ? {
|
|
|
|
nptr = unsafe { C.GC_REALLOC(old_data, new_size) }
|
|
|
|
} $else {
|
|
|
|
nptr = unsafe { C.realloc(old_data, new_size) }
|
|
|
|
}
|
2021-03-14 15:54:35 +03:00
|
|
|
if nptr == 0 {
|
2021-03-14 17:12:18 +03:00
|
|
|
panic('realloc_data($old_data, $old_size, $new_size) failed')
|
2021-03-14 15:54:35 +03:00
|
|
|
}
|
|
|
|
return nptr
|
|
|
|
}
|
|
|
|
|
2020-12-18 20:31:00 +03:00
|
|
|
// vcalloc dynamically allocates a zeroed `n` bytes block of memory on the heap.
|
|
|
|
// vcalloc returns a `byteptr` pointing to the memory address of the allocated space.
|
|
|
|
// Unlike `v_calloc` vcalloc checks for negative values given in `n`.
|
2021-04-04 17:43:32 +03:00
|
|
|
pub fn vcalloc(n int) &byte {
|
2020-12-15 10:41:02 +03:00
|
|
|
if n < 0 {
|
2021-10-03 20:27:46 +03:00
|
|
|
panic('calloc($n < 0)')
|
2020-12-15 10:41:02 +03:00
|
|
|
} else if n == 0 {
|
2021-04-04 17:43:32 +03:00
|
|
|
return &byte(0)
|
2020-12-15 10:41:02 +03:00
|
|
|
}
|
2021-06-08 16:51:32 +03:00
|
|
|
$if trace_vcalloc ? {
|
|
|
|
total_m += n
|
|
|
|
C.fprintf(C.stderr, c'vcalloc %6d total %10d\n', n, total_m)
|
|
|
|
}
|
2021-05-19 10:35:56 +03:00
|
|
|
$if prealloc {
|
|
|
|
return unsafe { prealloc_calloc(n) }
|
2021-05-23 12:37:23 +03:00
|
|
|
} $else $if gcboehm ? {
|
2021-05-19 10:35:56 +03:00
|
|
|
return unsafe { &byte(C.GC_MALLOC(n)) }
|
2021-03-20 16:16:36 +03:00
|
|
|
} $else {
|
2021-05-19 10:35:56 +03:00
|
|
|
return unsafe { C.calloc(1, n) }
|
2021-03-20 16:16:36 +03:00
|
|
|
}
|
2020-12-15 10:41:02 +03:00
|
|
|
}
|
|
|
|
|
2021-04-14 01:40:26 +03:00
|
|
|
// special versions of the above that allocate memory which is not scanned
|
|
|
|
// for pointers (but is collected) when the Boehm garbage collection is used
|
|
|
|
pub fn vcalloc_noscan(n int) &byte {
|
2021-06-08 16:51:32 +03:00
|
|
|
$if trace_vcalloc ? {
|
|
|
|
total_m += n
|
|
|
|
C.fprintf(C.stderr, c'vcalloc_noscan %6d total %10d\n', n, total_m)
|
|
|
|
}
|
2021-05-19 10:35:56 +03:00
|
|
|
$if prealloc {
|
|
|
|
return unsafe { prealloc_calloc(n) }
|
2021-05-23 12:37:23 +03:00
|
|
|
} $else $if gcboehm ? {
|
2021-04-14 01:40:26 +03:00
|
|
|
$if vplayground ? {
|
|
|
|
if n > 10000 {
|
|
|
|
panic('allocating more than 10 KB is not allowed in the playground')
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if n < 0 {
|
2021-10-03 20:27:46 +03:00
|
|
|
panic('calloc_noscan($n < 0)')
|
2021-04-14 01:40:26 +03:00
|
|
|
}
|
2021-06-12 11:27:08 +03:00
|
|
|
return $if gcboehm_opt ? {
|
|
|
|
unsafe { &byte(C.memset(C.GC_MALLOC_ATOMIC(n), 0, n)) }
|
|
|
|
} $else {
|
|
|
|
unsafe { &byte(C.GC_MALLOC(n)) }
|
|
|
|
}
|
2021-04-14 01:40:26 +03:00
|
|
|
} $else {
|
|
|
|
return unsafe { vcalloc(n) }
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2020-12-18 20:31:00 +03:00
|
|
|
// free allows for manually freeing memory allocated at the address `ptr`.
|
2020-12-15 10:41:02 +03:00
|
|
|
[unsafe]
|
|
|
|
pub fn free(ptr voidptr) {
|
|
|
|
$if prealloc {
|
|
|
|
return
|
2021-05-23 12:37:23 +03:00
|
|
|
} $else $if gcboehm ? {
|
2021-03-25 18:52:33 +03:00
|
|
|
// It is generally better to leave it to Boehm's gc to free things.
|
2021-03-25 10:15:01 +03:00
|
|
|
// Calling C.GC_FREE(ptr) was tried initially, but does not work
|
|
|
|
// well with programs that do manual management themselves.
|
2021-03-25 18:52:33 +03:00
|
|
|
//
|
|
|
|
// The exception is doing leak detection for manual memory management:
|
|
|
|
$if gcboehm_leak ? {
|
2021-05-19 10:35:56 +03:00
|
|
|
unsafe { C.GC_FREE(ptr) }
|
2021-03-25 18:52:33 +03:00
|
|
|
}
|
2021-05-23 12:37:23 +03:00
|
|
|
} $else {
|
|
|
|
C.free(ptr)
|
2021-03-20 16:16:36 +03:00
|
|
|
}
|
2020-12-15 10:41:02 +03:00
|
|
|
}
|
|
|
|
|
2020-12-18 20:31:00 +03:00
|
|
|
// memdup dynamically allocates a `sz` bytes block of memory on the heap
|
|
|
|
// memdup then copies the contents of `src` into the allocated space and
|
|
|
|
// returns a pointer to the newly allocated space.
|
2021-02-14 21:31:42 +03:00
|
|
|
[unsafe]
|
2020-12-15 10:41:02 +03:00
|
|
|
pub fn memdup(src voidptr, sz int) voidptr {
|
|
|
|
if sz == 0 {
|
|
|
|
return vcalloc(1)
|
|
|
|
}
|
|
|
|
unsafe {
|
|
|
|
mem := malloc(sz)
|
|
|
|
return C.memcpy(mem, src, sz)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2021-06-10 21:26:17 +03:00
|
|
|
[unsafe]
|
|
|
|
pub fn memdup_noscan(src voidptr, sz int) voidptr {
|
|
|
|
if sz == 0 {
|
|
|
|
return vcalloc_noscan(1)
|
|
|
|
}
|
|
|
|
unsafe {
|
2021-10-30 13:30:14 +03:00
|
|
|
mem := malloc_noscan(sz)
|
2021-06-10 21:26:17 +03:00
|
|
|
return C.memcpy(mem, src, sz)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2021-02-22 15:54:24 +03:00
|
|
|
[inline]
|
|
|
|
fn v_fixed_index(i int, len int) int {
|
|
|
|
$if !no_bounds_checking ? {
|
|
|
|
if i < 0 || i >= len {
|
|
|
|
s := 'fixed array index out of range (index: $i, len: $len)'
|
|
|
|
panic(s)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return i
|
|
|
|
}
|
2021-08-12 21:46:38 +03:00
|
|
|
|
|
|
|
// print_backtrace shows a backtrace of the current call stack on stdout
|
|
|
|
pub fn print_backtrace() {
|
|
|
|
// At the time of backtrace_symbols_fd call, the C stack would look something like this:
|
|
|
|
// * print_backtrace_skipping_top_frames
|
|
|
|
// * print_backtrace itself
|
|
|
|
// * the rest of the backtrace frames
|
|
|
|
// => top 2 frames should be skipped, since they will not be informative to the developer
|
|
|
|
$if !no_backtrace ? {
|
|
|
|
$if freestanding {
|
|
|
|
println(bare_backtrace())
|
|
|
|
} $else {
|
|
|
|
$if tinyc {
|
|
|
|
C.tcc_backtrace(c'Backtrace')
|
|
|
|
} $else {
|
|
|
|
print_backtrace_skipping_top_frames(2)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|