Commit 67491a4222f2dacf047989329d4c16a5a2f163d5 | zig

author	Andrew Kelley <andrew@ziglang.org> 2019-09-11 15:01:21-04:00
committer	Andrew Kelley <andrew@ziglang.org> 2019-09-11 15:01:54-04:00
log	67491a4222f2dacf047989329d4c16a5a2f163d5
tree	0001a1a62f9d8b2550c78ced8275478e043c87f4
parent	c9b2210fcf58d9e99851ad2a6a1219c997cf0d82
signature	Commit is signed but in an unrecognized format.

disable runtime safety in std.io.InStream

Let's not be writing 0xaa in safe modes for upwards of 4 MiB for every
stream read. This is equivalent to the fact that we don't memset the
entire call stack to 0xaa for every function call.

1 files changed, 3 insertions(+), 3 deletions(-)

std
- io
  - in_stream.zig

std/io/in_stream.zig+3-3

...	...	@@ -32,10 +32,10 @@ pub fn InStream(comptime ReadError: type) type {
32	32	/// End of stream is not an error condition.
33	33	pub fn read(self: *Self, buffer: []u8) Error!usize {
34	34	if (std.io.is_async) {
	35	// Let's not be writing 0xaa in safe modes for upwards of 4 MiB for every stream read.
	36	@setRuntimeSafety(false);
35	37	var stack_frame: [stack_size]u8 align(stack_align) = undefined;
36		// TODO https://github.com/ziglang/zig/issues/3068
37		var result: Error!usize = undefined;
38		return await @asyncCall(&stack_frame, &result, self.readFn, self, buffer);
	38	return await @asyncCall(&stack_frame, {}, self.readFn, self, buffer);
39	39	} else {
40	40	return self.readFn(self, buffer);
41	41	}