From 9acfd167fa80e14b7beb1eb29830cb0c7d50e586 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Alex=20R=C3=B8nne=20Petersen?= Date: Sat, 10 Jan 2026 21:04:20 +0100 Subject: [PATCH] std.process: add PermissionDenied to ProtectMemoryError (for OpenBSD) See EPERM notes on https://man.openbsd.org/mprotect.2. --- lib/std/process.zig | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/lib/std/process.zig b/lib/std/process.zig index 3eaffc24fe45dc72cd8a4f6dc4dfae2934465e36..8a3d20f776a94fb104bfda6987a7a7a49f44e6ca 100644 --- a/lib/std/process.zig +++ b/lib/std/process.zig @@ -1004,6 +1004,10 @@ pub fn unlockMemoryAll() UnlockMemoryError!void { pub const ProtectMemoryError = error{ UnsupportedOperation, + /// OpenBSD will refuse to change memory protection if the specified region + /// contains any pages that have previously been marked immutable using the + /// `mimmutable` function. + PermissionDenied, /// The memory cannot be given the specified access. This can happen, for /// example, if you memory map a file to which you have read-only access, /// then use `protectMemory` to mark it writable. @@ -1052,6 +1056,7 @@ pub fn protectMemory( }; switch (posix.errno(posix.system.mprotect(memory.ptr, memory.len, flags))) { .SUCCESS => return, + .PERM => return error.PermissionDenied, .INVAL => |err| return std.Io.Threaded.errnoBug(err), .ACCES => return error.AccessDenied, .NOMEM => return error.OutOfMemory, -- 2.54.0