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Add missing clobbers to context switching

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This only shows in release mode, the compiler tries to preserve some
value in rdi, but that gets replaced inside the fiber. This would not
happen in the C calling convention, but in these normal Zig functions,
it can happen.
This commit is contained in:
Lukas Lalinsky 2025-10-09 08:52:52 +02:00 committed by Andrew Kelley
parent 88693a56fc
commit 2b5306a94b
1 changed files with 2 additions and 0 deletions
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lib/std/Io/EventLoop.zig
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@ -644,6 +644,7 @@ inline fn contextSwitch(message: *const SwitchMessage) *const SwitchMessage {
: [received_message] "={x1}" (-> *const @FieldType(SwitchMessage, "contexts")), : [received_message] "={x1}" (-> *const @FieldType(SwitchMessage, "contexts")),
: [message_to_send] "{x1}" (&message.contexts), : [message_to_send] "{x1}" (&message.contexts),
: .{ : .{
.x0 = true,
.x1 = true, .x1 = true,
.x2 = true, .x2 = true,
.x3 = true, .x3 = true,
@ -745,6 +746,7 @@ inline fn contextSwitch(message: *const SwitchMessage) *const SwitchMessage {
.rdx = true, .rdx = true,
.rbx = true, .rbx = true,
.rsi = true, .rsi = true,
.rdi = true,
.r8 = true, .r8 = true,
.r9 = true, .r9 = true,
.r10 = true, .r10 = true,