Instead of doing everything at once which is a hopelessly large task,
this introduces a piecemeal transition that can be done in small
increments at a time.
This is a minimal changeset that keeps the compiler compiling. It only
uses the InternPool for a small set of types.
Behavior tests are not passing.
Air.Inst.Ref and Zir.Inst.Ref are separated into different enums but
compile-time verified to have the same fields in the same order.
The large set of changes is mainly to deal with the fact that most Type
and Value methods now require a Module to be passed in, so that the
InternPool object can be accessed.
We need to set rbp last because the arguments are stored on the
stack. If we clobber rbp first, then we will get a segfault when
trying to access the function arguments.
I believe I had already done this with the other syscall* functions,
but not with syscall1, so this allows single argument syscalls like
close to work.
To avoid leaking slots, `fetchRemove` must increment `available` (when the "fetch" succeeds).
Without the `available += 1`, the added test `"std.hash_map repeat fetchRemove"` fails with
run test std-x86-linux-none-Debug: error: thread 432734 panic: integer overflow
.../zig/lib/std/hash_map.zig:1365:28: 0x6471d5 in getOrPutAssumeCapacityAdapted__anon_47495 (test)
self.available -= 1;
^
.../zig/lib/std/hash_map.zig:1308:62: 0x616950 in getOrPutAssumeCapacityContext (test)
const result = self.getOrPutAssumeCapacityAdapted(key, ctx);
^
Alternatively, `fetchRemove` could call `removeByIndex`, though that would entail calling `header()` twice instead of once.
Before this commit, if Walker.next errored with e.g. `error.AccessDenied` and the caller did something like `while (true) { walker.next() catch continue; }`, then the directory that errored with AccessDenied would be continually iterated in each `next` call and error every time with AccessDenied.
After this commit, the directory that errored will be popped off the stack before the error is returned, meaning that in the subsequent `next` call, it won't be retried and the Walker will continue with whatever directories remain on its stack.
For a real example, before this commit, walking `/proc/` on my system would infinitely loop due to repeated AccessDenied errors on the same directory. After this commit, I am able to walk `/proc/` on my system fully (skipping over any directories that are unable to be iterated).
Since we are opening each directory for iteration, we know that we don't need to reset the cursor's directory before iterating. Using `iterateAssumeFirstIteration` skips the cursor resetting which eliminates an `lseek` syscall for every directory opened on non-Windows platforms.
This doesn't seem to actually matter much for performance (1.01 ± 0.02 times faster when walking /home/ on my system) but avoiding unnecessary syscalls is always nice anyway.
Fixes https://github.com/ziglang/zig/issues/14465
For aarch64, LLVM was crashing because Zig commands it to generate FPU code
even when there is no FPU present. This commit implements the necessary checks
to avoid this undesired situation and aarch64 can be compiled again with
no FPU.
crypto.bcrypt: allow very large passwords to be pre-hashed
bcrypt has a slightly annoying limitation: passwords are limited
to 72 characters. In the original implementation, additional characters
are silently ignored.
When they care, applications adopt different strategies to work around
this, in incompatible ways.
Ideally, large passwords should be pre-hashed using a hash function that
hinders GPU attackers, and the hashed function should not be deterministic
in order to defeat shucking attacks.
This change improves the developer experience by adding a very explicit
`silently_truncate_password` option, that can be set to `false` in
order to do that automatically, and consistently across Zig applications.
By default, passwords are still truncated, so this is not a breaking
change.
Add some inline documentation for our beloved autodoc by the way.
Windows defines `recv` and `recvfrom` to return a value of type `int`,
rather than a pointer-sized signed integer, and so should use `c_int`
rather than `isize` for their return types.
Fixes bug causing ReleaseSmall to fail on Windows.
Due to the change in default behavior of ReleaseSmall, debug info are
stripped by default. However because `Compile.create` still defaults to
null, `producesPdbFile` will report true for
`lib/std/Build/Step/InstallArtifact.zig` causing it to fail on copying a
file that does not exist. This commit change the default of strip
depending on `optimize`.
Previously we did not write any missing padding bytes after the smallest
field (either tag or payload, depending on alignment). This resulted in
writing too few bytes and not matching the full abisize of the union.
When storing the address after calculating the element's address,
ensure it's stored in a local with the correct type. Previously it
would incorrectly use the element's type, which could be a float for
example and therefore generate invalid WebAssembly code.
This change also introduces a more robust `store` function.
When the paylaod is zero-sized we must ensure a valid pointer
is still returned for the ptr variation of the instruction. This,
because it's valid to have a pointer to a zero-sized value.
In such a case, we simply return the operand.
Andrew Kelley