This has two benefits:
1. It attributes these bytes to the internal/task package (in
-size=full), instead of (unknown).
2. It makes it possible to print the stack sizes variable in GDB.
This is what it might look like in GDB:
(gdb) p 'internal/task.stackSizes'
$13 = {344, 120, 80, 2048, 360, 112, 80, 120, 2048, 2048}
Previously we were using a really weird calculation to determine the
alignment in bits - written by me (no idea what I was thinking at the
time, it's obviously incorrect). Just replace it with the much more
obviously correct multiplication by 8 to get bits from bytes.
Found while working on properly dealing with alignment in `-size=full`.
The compiler now uses DW_OP_plus_uconst in the address attribute of
DWARF variables. To be able to understand these addresses, we need to be
able to parse this opcode.
This commit should also improve the reliability of address parsing a
bit.
Previously the code size of the compiler-rt library might be displayed
like this:
```
1050 0 0 0 | 1050 0 | /home/ayke/src/tinygo/tinygo/llvm-project/compiler-rt/lib/builtins
146 0 0 0 | 146 0 | /home/ayke/src/tinygo/tinygo/llvm-project/compiler-rt/lib/builtins/arm
```
With this change, it is displayed nicely like this:
```
1196 0 0 0 | 1196 0 | C compiler-rt
```
This should fix a number of concurrency/threading issues.
I had to force-disable concurrency in the linker using a hack. I'm not
entirely sure what the cause is, possibly the MinGW version (version 12
appears to work for me, while version 11 as used on the GitHub runner
image seems to be broken).
There are a few ways to fix this in a better way:
* Fix the underlying cause (possibly by upgrading to MinGW-w64 12).
* Add the `--threads` flag to the LLD MinGW linker, so we can use a
regular parameter instead of this hack.
This is an attempt to figure out why the Windows CI keeps crashing. It
should be removed before the next release, by which point we should know
whether this has helped or not.
There was a mostly benign race condition in the compiler. The issue was
that there is a check for type aliases (which can alias types in another
function), but this check was _after_ accessing a property of the
function that might not have been completed.
I don't think this can have any serious effects, as the function is
skipped anyway, but such bugs should certainly be fixed.
If there is no source location, at least use the file (but not line) for
debug information.
This attributes almost 1kB of string data for ./testdata/stdlib.go when
compiling for WASI.
This is helpful for WebAssembly: it makes it possible to attribute many
more data to locations in the source code, which makes `-size=full` more
useful.
Removes usage of AsmFull which required an optimization pass to remove the map parameter passed into it. This caused issues when compiling with -opt=0 where memory for the map was being allocated as an unintended side-effect of using AsmFull with no optimizations enabled.
I have checked this conversion is not needed anymore after the previous
commit, by running various smoke tests of which none triggered this
optimization. The only case where the optimization would have kicked in
is in syscall/syscall_windows.go:76 of the Go standard library.
Therefore, I prefer to remove it to reduce code complexity.
We have an optimization for this specific pattern, but it's really just
a hack. With the addition of unsafe.Add in Go 1.17 we can directly
specify the intent instead and eventually remove this special case.
The code is also easier to read.
