This reverts commit 06310e3d4e, reapplying
commit a430630002.
I deeply apologize to @moosichu and those affected by this bug. The
original fix was actually fine. When I reverted it, I misremembered
how the Cache API works. I thought the fix was going to introduce
nondeterminism into the hash, but I forgot that the order of files in
the manifest doesn't actually matter when checking for a cache hit.
Actually, it does matter a little bit. This fix has a subtle downside
which is that it does introduce the possibility of false negatives when
checking for cache hits of 2+ iterations ago. For example, if the code
goes from "foo", to "bar", and then back to "foo", it may look like a
cache miss when it should have been a hit because 2 iterations ago the
code was the same. However, this is an uncommon use case, and all it
does is cause a bit of wasted time and disk space. That said, my
suggestion from earlier still applies and would be a nice follow-up
enhancement to this fix:
The proper solution to this is to, in whole cache mode, append the hash
inputs to some data structure, and then after the compilation is
complete, do some kind of sorting on the hash inputs so that they will
be the same order every time, then apply them in sequence. No lock on
the Cache object is needed for this scheme.
closes#11063
Instead of making the memory alignment functions more complicated, I
added more API documentation for their existing semantics.
closes#12118closes#12135
Previously, if you used `zig test -ofmt=c -target foobar` then Zig would
try to compile the generated C code with the native target instead of
"foobar".
With this change, `--test-cmd` with e.g. QEMU still won't work, but at
least the binary will get compiled for the correct target.
We need to be careful to respect side-effects/branching in these
cases, but otherwise this behaves very similarly to multiplication.
`lhs and rhs == false` if either lhs or rhs is comptime-known `false`,
just like `lhs * rhs == 0` if either lhs or rhs is comptime-known to
be zero.
Similar reasoning applies to `lhs or rhs`.
* std.os.uefi: integer backed structs, add tests to catch regressions
device_path_protocol now uses extern structs with align(1) fields because
the transition to integer backed packed struct broke alignment
added comptime asserts that device_path_protocol structs do not violate
alignment and size specifications
this is a hack meant to restore functionality for the upcoming release,
a proper analysis of the new zir structure is required to make a robust
change.
Make the test use the minimum length and set MAX_NAME_BYTES to the maximum so that:
- the test will work on any host platform
- *and* the MAX_NAME_BYTES will be able to hold the max file name component on any host platform
Each u16 within a file name component can be encoded as up to 3 UTF-8 bytes, so we need to use MAX_NAME_BYTES to account for all possible UTF-8 encoded names.
Fixes#8268
Before, the code for building glibc stubs used a special case of the
Cache API that did not add any file inputs, and did not use
writeManifest(). This is not really how the Cache API is designed to
work and it shows because there was a race condition.
This commit adds as an input file the abilists file that comes with
Zig's installation, which has the added benefit of making glibc stub
caching properly detect cache invalidation when the user decides to
overwrite their abilists file. This harmonizes with the rest of how Zig
works, which intentionally allows you to hack the installation files and
have it behave properly with the cache system.
Finally, because of having any file inputs, the normal API flow of the
Cache system can be used, eliminating the one place that used the Cache
API in a special way. In other words, it uses writeManifest() now and
properly obeys the cache hit/miss semantics.
closes#13160
