ptrToInt causes compiler segfault with microzig #15712
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bug
Observed behavior contradicts documented or intended behavior
contributor friendly
This issue is limited in scope and/or knowledge of Zig internals.
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The file |
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I trimmed the file. |
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I happen to have a debug build, so if it'd help: |
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I was able to reproduce a segfault without microzig, I am not sure if this is the same bug, I added |
I think this one triggers #15513 |
pub fn main() !void {
var int_values: [5]u32 = .{0} ** 5;
var rx: [21]u8 = .{0} ** 21;
@memcpy(@ptrCast([*]u8, &int_values), rx[1..]);
}might be fixed with #15704. |
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Yes this seems different, good call. |
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Running the repo now produces: The simplified example runs fine. |
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Suggestion to close and, if needed, clarify with a new issue for feature detection. |
If you execute the command manually in a shell, you need to quote the file name as there is a space in it.
Yes, this was issue #15704 and is fixed.
The original issue stands, I sidetracked with the second example, but it had nothing to do with the original issue. I will try to bundle everything in a single file. |
const std = @import("std");
const assert = std.debug.assert;
pub fn Mmio(comptime PackedT: type) type {
const size = @bitSizeOf(PackedT);
const IntT = std.meta.Int(.unsigned, size);
return extern struct {
const Self = @This();
raw: IntT,
pub const underlying_type = PackedT;
};
}
pub const devices = struct {
pub const AES = @intToPtr(*volatile types.AES, 0x40026000);
};
pub const types = struct {
/// Advanced encryption standard hardware accelerator
pub const AES = extern struct {
/// control register
CR: Mmio(packed struct(u32) {
EN: u1,
padding: u31,
}),
};
};
pub fn main() !void {
var addr = @ptrToInt(&devices.AES.CR.raw);
_ = addr;
}
Triggers the bug (repo updated too). |
andrewrk
added
the
bug
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Thanks for the reduction. No longer reproduces with |
andrewrk
added
the
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When compiling the following repo with zig version
0.11.0-dev.3138+87de8212adI get a compiler segfault.I was not able to isolate the issue to a simple example so I made a repo.
Repo: https://github.com/kuon/zig-bug-2
Error below.
I got a coredump, but my zig is not built in debug mode so it doesn't help much. If you cannot reproduce with my repo above, I'll rebuild in debug.
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