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openbsd: adding EPERM for msync() against hitting a immutable region page (#18701)

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bilaliscarioth 2024-08-23 16:28:00 +02:00 committed by GitHub
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commit df6907f601
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lib/std/posix.zig
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@ -4746,11 +4746,13 @@ pub fn munmap(memory: []align(mem.page_size) const u8) void {
pub const MSyncError = error{
UnmappedMemory,
PermissionDenied,
} || UnexpectedError;
pub fn msync(memory: []align(mem.page_size) u8, flags: i32) MSyncError!void {
switch (errno(system.msync(memory.ptr, memory.len, flags))) {
.SUCCESS => return,
.PERM => return error.PermissionDenied,
.NOMEM => return error.UnmappedMemory, // Unsuccessful, provided pointer does not point mapped memory
.INVAL => unreachable, // Invalid parameters.
else => unreachable,
@ -7106,6 +7108,7 @@ pub const MadviseError = error{
pub fn madvise(ptr: [*]align(mem.page_size) u8, length: usize, advice: u32) MadviseError!void {
switch (errno(system.madvise(ptr, length, advice))) {
.SUCCESS => return,
.PERM => return error.PermissionDenied,
.ACCES => return error.AccessDenied,
.AGAIN => return error.SystemResources,
.BADF => unreachable, // The map exists, but the area maps something that isn't a file.