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lib/compiler/build_runner: only build Fuzz on 64-bit platforms #23018

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Feb 27, 2025
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lib/compiler/build_runner: only build Fuzz on 64-bit platforms #23018

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7 changes: 7 additions & 0 deletions lib/compiler/build_runner.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -431,6 +431,13 @@ pub fn main() !void {
.windows => fatal("--fuzz not yet implemented for {s}", .{@tagName(builtin.os.tag)}),
else => {},
}
if (@bitSizeOf(usize) != 64) {
// Current implementation depends on posix.mmap()'s second parameter, `length: usize`,
// being compatible with `std.fs.getEndPos() u64`'s return value. This is not the case
// on 32-bit platforms.
// Affects or affected by issues #5185, #22523, and #22464.
fatal("--fuzz not yet implemented on {d}-bit platforms", .{@bitSizeOf(usize)});
}
const listen_address = std.net.Address.parseIp("127.0.0.1", listen_port) catch unreachable;
try Fuzz.start(
gpa,
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