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A little more resizing of buffers. apps/hex.subx is now building an
identical binary.
I'm now aborting on allocation failures. That requires disabling
a couple of tests. (I'm not quite confident enough of this decision to
delete them outright.) I want to treat all segfaults as bugs, and
machine code is no place to add boilerplate checks for return values of
standard library functions.
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Bugfix fifteen -- on the C++ side.
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We can now translate layers 49-56 using the self-hosted translator
(`translate` and `ntranslate`).
As a follow-up to commit 5404, the self-hosted translator is a little
more strict than the C++ translator in 3 places:
a) All .subx files must define a data segment.
b) All .subx files must define an `Entry` label.
c) All numbers must be in *lowercase* hex.
In all cases, where programs work with the C++ translator but violate
the self-hosted translator's assumptions, we must make sure we raise
errors rather than silently emit bad code.
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Break a dependency from `print-int32` to `from-hex-char`.
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Fix CI.
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Bugfix ten: type error in `convert`. I was calling `rewind-stream` on a
`buffered-file`.
examples/ex1 is now just one nibble off the canonical.
I *have* found one missing feature in the self-hosted translator,
though: dquotes doesn't support newlines in strings, even though the C++
version does. dquotes parses them right, but the value initialized in
the data segment is wrong.
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Move test slice variables out of the data segment and close to their
usages. Makes tests a little easier to read even if we spend a few more
instructions each time.
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High time we pulled in the final changes to dquotes.
In the process we fix one recently introduced duplicate symbol.
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Kinda hacky, but might scale enough for machine code.
This was really hard to debug. Single tests passed, but when I ran all
tests I got breakage because tests long before (from the 056trace layer)
were not cleaning up properly.
My instinct was to call clear-stream on Trace-stream, which was wrong
(the trace didn't have the wrong contents, it was literally a bad
object). It was also wrong in a counter-productive way: calling
clear-stream on a real Trace stream (which is the size of a page of
memory) takes a long time in emulated mode.
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Clean up CI.
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Simplify `string-equal`.
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I think the path to readable tests for survey.subx passes through
white-box tests.
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'get-or-insert-stream' is now the more generic 'get-or-insert' that can
handle tables of any value type. But callers have to be careful to cast
values to the right type.
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Mostly for tests. For every new type we want to compare in a test, we're
now going to start using some primitive that can parse its value from string. In this manner we can get syntax for literals in machine code.
Open question: parsing aggregates of aggregates. Like an array of structs.
This is the first time we allocate from the heap in standard library tests.
So we now need to start initializing the heap in all our apps.
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hoist 'Heap' variable into the std library in anticipation of the parse-array-of-ints
primitive.
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Fix CI.
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Clean up some old TODOs related to our pre-mmap limitations.
Also caught another case of using the wrong comparison. When comparing
addresses, one must always use unsigned rather than signed jump instructions.
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Still some failing tests:
- emit-string-literal-data doesn't ignore metadata when computing the
length of literal strings
- emit-string-literal-data doesn't handle escape sequences
One issue doesn't have a failing test:
- emit-metadata doesn't handle string literals containing '/'
All these open issues involve a common design question: how to parse a
'word' that includes a string literal that may include spaces.
For everything else I know words can't contain spaces and datums can't
contain slashes. But for string literals things are tougher.
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dquotes.subx is now segfaulting after this merge. Seems to be trying to
use addresses from the old stack.
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Skimping on tests; the code changes seem pretty trivial. Will this fix
CI?!
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Pretty blunt for now; just abort the entire program on any failure to write.
I'm encountering it because I'm somehow treating a stream address as a
file descriptor. Maybe mmap is returning addresses below 0x08000000?
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Bugfix: I'd neglected to update the input stream's state when natively
writing a stream to file.
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Segfault in this branch is now fixed.
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All tests passing now. Things are very explicit; before a program can `allocate`
memory, it has to first obtain a segment from the OS using `new-segment`.
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These are variants of write-byte-buffered and print-byte-buffered respectively
that operate on in-memory `stream`s rather than `buffered-file`s.
They don't operate on files, so we'll avoid using the prefix 'write-'.
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Operations on buffered-file now always include the word 'buffered'. More
verbose, but hopefully this highlights holes in the library.
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