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feat: more improvements to panic handling

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Follow on panics no longer confuse the panic output and the just in
time debugger now works properly on the local tty.
This commit is contained in:
CJ van den Berg 2025-07-03 16:23:29 +02:00
parent 14dce0a10b
commit e9735d9425
Signed by: neurocyte
GPG key ID: 8EB1E1BB660E3FB9
5 changed files with 42 additions and 12 deletions
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33
src/renderer/vaxis/renderer.zig
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@ -135,15 +135,46 @@ pub fn install_crash_handler() void {
std.posix.sigaction(std.posix.SIG.ILL, &act, null);
}
pub var jit_debugger_enabled: bool = false;
fn handle_crash(sig: i32, info: *const std.posix.siginfo_t, ctx_ptr: ?*anyopaque) callconv(.c) noreturn {
const debug = @import("std/debug.zig");
debug.lockStdErr();
if (panic_in_progress())
std.posix.abort();
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);
if (jit_debugger_enabled) {
handleSegfaultPosixNoAbort(sig, info, ctx_ptr);
@import("thespian").sighdl_debugger(sig, @ptrCast(@constCast(info)), ctx_ptr);
std.posix.abort();
} else {
debug.handleSegfaultPosix(sig, info, ctx_ptr);
}
unreachable;
}
fn handleSegfaultPosixNoAbort(sig: i32, info: *const std.posix.siginfo_t, ctx_ptr: ?*anyopaque) void {
const debug = @import("std/debug.zig");
debug.resetSegfaultHandler();
const addr = switch (builtin.os.tag) {
.linux => @intFromPtr(info.fields.sigfault.addr),
.freebsd, .macos => @intFromPtr(info.addr),
.netbsd => @intFromPtr(info.info.reason.fault.addr),
.openbsd => @intFromPtr(info.data.fault.addr),
.solaris, .illumos => @intFromPtr(info.reason.fault.addr),
else => unreachable,
};
const code = if (builtin.os.tag == .netbsd) info.info.code else info.code;
debug.dumpSegfaultInfoPosix(sig, code, addr, ctx_ptr);
}
pub fn run(self: *Self) Error!void {