`std.builtin.StackTrace` gains a `format` function.
GeneralPurposeAllocator uses `std.log.err` instead of directly printing
to stderr. Some errors are recoverable.
The test runner is modified to fail the test run if any log messages of
"err" or worse severity are encountered.
self-hosted is modified to always print log messages of "err" severity
or worse even if they have not been explicitly enabled.
This makes GeneralPurposeAllocator available on the freestanding target.
* std.Mutex API is improved to not have init() deinit(). This API is
designed to support static initialization and does not require any
resource cleanup. This also happens to work around some kind of
stage1 behavior that wasn't letting the new allocator mutex code
get compiled.
* the general purpose allocator now returns a bool from deinit()
which tells if there were any leaks. This value is used by the test
runner to fail the tests if there are any.
* self-hosted compiler is updated to use the general purpose allocator
when not linking against libc.
I made two mistakes in the previous commit; it was not actually using
the argv that we built, and also the qemu logic was unconditionally
skipping the test.
Now I have verified that when mangling the RISC-V "hello world" test and
then using -Denable-qemu, we get a test failure.
SrcFn represents the function in the linked output file, if the
`Decl` is a function. This is stored here and not in `Fn` because `Decl`
survives across updates but `Fn` does not.
TODO Look into making `Fn` a longer lived structure and moving this field there
to save on memory usage.
Empirically, debug info consumers do not respect this field, or otherwise
consider it to be an error when it does not point exactly to the end of the header.
Therefore we rely on the NOP jump at the beginning of the Line Number Program for
padding rather than this field.
llvm-dwarfdump says the line number data is fine; gdb and
binutils-readelf crap out.
