authorgravatar for david@vortan.devDavid Rubin <david@vortan.dev> 2025-11-06 17:44:28-08:00
committergravatar for david@vortan.devDavid Rubin <david@vortan.dev> 2025-11-06 17:44:28-08:00
log71988d6719db20e1be24586bab201af72b021b3c
treeede810338f48667d515f6bcf96714461265c87e1
parent654a5b20d7a8eb2d4267b859aff615e4806733c2
signaturelock-open Commit is signed but in an unrecognized format.

Io.net: set `receive{,Timeout}` message to `init`

If we use `undefined`, then `netReceive` can `@intCast` the control slice len to msghdr controllen, which is sometimes `u32`, even on 64-bit platforms. `init` just avoids this entirely by setting `control` to an empty slice rather than undefined.

1 files changed, 2 insertions(+), 2 deletions(-)

lib/std/Io/net.zig+2-2
......@@ -1118,7 +1118,7 @@ pub const Socket = struct {
11181118 /// See also:
11191119 /// * `receiveTimeout`
11201120 pub fn receive(s: *const Socket, io: Io, buffer: []u8) ReceiveError!IncomingMessage {
1121 var message: IncomingMessage = undefined;
1121 var message: IncomingMessage = .init;
11221122 const maybe_err, const count = io.vtable.netReceive(io.userdata, s.handle, (&message)[0..1], buffer, .{}, .none);
11231123 if (maybe_err) |err| switch (err) {
11241124 // No timeout is passed to `netReceieve`, so it must not return timeout related errors.
......@@ -1144,7 +1144,7 @@ pub const Socket = struct {
11441144 buffer: []u8,
11451145 timeout: Io.Timeout,
11461146 ) ReceiveTimeoutError!IncomingMessage {
1147 var message: IncomingMessage = undefined;
1147 var message: IncomingMessage = .init;
11481148 const maybe_err, const count = io.vtable.netReceive(io.userdata, s.handle, (&message)[0..1], buffer, .{}, timeout);
11491149 if (maybe_err) |err| return err;
11501150 assert(1 == count);