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feat: install signal crash handler to reset terminal before dumping stack traces

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This currently requires cloning std.debug to grant access to the standard trace
dump handler. Hopefully in future this could be made public in the standard
library.
This commit is contained in:
CJ van den Berg 2025-07-01 17:34:41 +02:00
parent f9189722c2
commit 21551795ad
Signed by: neurocyte
GPG key ID: 8EB1E1BB660E3FB9
3 changed files with 1764 additions and 2 deletions
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28
src/renderer/vaxis/renderer.zig
View file

@ -118,6 +118,34 @@ pub fn panic_in_progress() bool {
return in_panic.load(.acquire);
}
pub fn install_crash_handler() void {
if (!std.debug.have_segfault_handling_support) {
@compileError("segfault handler not supported for this target");
}
const act = std.posix.Sigaction{
.handler = .{ .sigaction = handle_crash },
.mask = std.posix.empty_sigset,
.flags = (std.posix.SA.SIGINFO | std.posix.SA.RESTART),
};
std.posix.sigaction(std.posix.SIG.BUS, &act, null);
std.posix.sigaction(std.posix.SIG.SEGV, &act, null);
std.posix.sigaction(std.posix.SIG.ABRT, &act, null);
std.posix.sigaction(std.posix.SIG.FPE, &act, null);
std.posix.sigaction(std.posix.SIG.ILL, &act, null);
}
fn handle_crash(sig: i32, info: *const std.posix.siginfo_t, ctx_ptr: ?*anyopaque) callconv(.c) noreturn {
in_panic.store(true, .release);
const cleanup = panic_cleanup;
panic_cleanup = null;
if (cleanup) |self| {
self.vx.deinit(self.allocator, self.tty.anyWriter());
self.tty.deinit();
}
@import("std/debug.zig").handleSegfaultPosix(sig, info, ctx_ptr);
}
pub fn run(self: *Self) Error!void {
self.vx.sgr = .legacy;
self.vx.conpty_hacks = true;