mirror of
https://github.com/ziglang/zig.git
synced 2026-01-28 18:25:26 +00:00
07a71fc322
* instead of emitting a breakpoint for a debug safety crash,
zig calls a panic function which prints an error message
and a stack trace and then calls abort.
* on freestanding OS, this panic function has a default
implementation of a simple infinite loop.
* users can override the panic implementation by providing
`pub fn panic(message: []const u8) -> unreachable { }`
* workaround for LLVM segfaulting when you try to use cold
calling convention on ARM.
closes #245
34 lines
1.1 KiB
Zig
34 lines
1.1 KiB
Zig
// This file is included if and only if the user's main source file does not
|
|
// include a public panic function.
|
|
// If this file wants to import other files *by name*, support for that would
|
|
// have to be added in the compiler.
|
|
|
|
var panicking = false;
|
|
pub coldcc fn panic(message: []const u8) -> unreachable {
|
|
if (@compileVar("os") == Os.freestanding) {
|
|
while (true) {}
|
|
} else {
|
|
const std = @import("std");
|
|
const io = std.io;
|
|
const debug = std.debug;
|
|
const os = std.os;
|
|
|
|
// TODO
|
|
// if (@atomicRmw(AtomicOp.XChg, &panicking, true, AtomicOrder.SeqCst)) {
|
|
if (panicking) {
|
|
// Panicked during a panic.
|
|
// TODO detect if a different thread caused the panic, because in that case
|
|
// we would want to return here instead of calling abort, so that the thread
|
|
// which first called panic can finish printing a stack trace.
|
|
os.abort();
|
|
} else {
|
|
panicking = true;
|
|
}
|
|
|
|
%%io.stderr.printf("{}\n", message);
|
|
%%debug.printStackTrace();
|
|
|
|
os.abort();
|
|
}
|
|
}
|