Previously, the compiler would default to hardfloat. This is not
supported by some MIPS CPUs.
This took me much longer than it should have because of a quirk in the
LLVM Mips backend: if the target-features string is not set (like during
LTO), the Mips backend picks the first function in the module and uses
that. Unfortunately, in the case of TinyGo this first function is
`llvm.dbg.value`, which is an LLVM intrinsic and doesn't have the
target-features string. I fixed it by adding a `-mllvm -mattr=` flag to
the linker.
This shows nicely formatted error messages for missing symbol names and
for out-of-flash, out-of-RAM conditions (on microcontrollers with
limited flash/RAM).
Unfortunately the missing symbol name errors aren't available on Windows
and WebAssembly because the linker doesn't report source locations yet.
This is something that I could perhaps improve in LLD.
This adds linux/mipsle (little endian Mips) support to TinyGo.
It also adds experimental linux/mips (big-endian) support. It doesn't
quite work yet, some parts of the standard library (like the reflect
package) currently seem to assume a little-endian system.
This is a refactor, which should (in theory) not change the behavior of
the compiler. But since this is a pretty large change, there is a chance
there will be some regressions. For that reason, the previous commits
added a bunch of tests to make sure most error messages will not be
changed due to this refactor.
This is needed for some improvements I'm going to make next.
This commit also refactors error handling slightly to make it more
easily testable, this should hopefully not result in any actual changes
in behavior.
Uses a vendored "internal/diff" from Big Go to show the differences
between the expected and actual outputs when tests fail.
Signed-off-by: L. Pereira <l.pereira@fastly.com>
This means it's possible to test just a particular OS/arch with a
command like this:
go test -run=Build -target=linux/arm
I found it useful while working on MIPS support.
Support for `-panic=trap` was previously a pass in the optimization
pipeline. This change moves it to the compiler and runtime, which in my
opinion is a much better place.
As a side effect, it also fixes
https://github.com/tinygo-org/tinygo/issues/4161 by trapping inside
runtime.runtimePanicAt and not just runtime.runtimePanic.
This change also adds a test for the list of imported functions. This is
a more generic test where it's easy to add more tests for WebAssembly
file properties, such as exported functions.
This fixes the new loop variable behavior in Go 1.22.
Specifically:
* The compiler (actually, the x/tools/go/ssa package) now correctly
picks up the Go version.
* If a module doesn't specify the Go version, the current Go version
(from the `go` tool and standard library) is used. This fixes
`go run`.
* The tests in testdata/ that use a separate directory are now
actually run in that directory. This makes it possible to use a
go.mod file there.
* There is a test to make sure old Go modules still work with the old
Go behavior, even on a newer Go version.
This adds true GOOS=wasip1 support in addition to our existing
-target=wasi support. The old support for WASI isn't removed, but should
be treated as deprecated and will likely be removed eventually to reduce
the test burden.
Add the timers test because they now work correctly on AVR, probably as
a result of the reflect refactor: https://github.com/tinygo-org/tinygo/pull/2640
I've also updated a few of the other tests to indicate the new status
and why they don't work. It's no longer because of compiler errors, but
because of linker or runtime errors (which is at least some progress).
For example, I found that testdata/reflect.go works if you disable
`testAppendSlice` and increase the stack size.
Before this patch, a compile error would prevent the 'ok' or 'FAIL' line
to be printed. That's unexpected. This patch changes the code in such a
way that it's obvious a test result line is printed in all cases.
To be able to also print the package name, I had to make sure the build
result is passed through everywhere even on all the failure paths. This
results in a bit of churn, but it's all relatively straightforward.
Found while working on Go 1.20.
This commit adds support for time.NewTimer and time.NewTicker. It also
adds support for the Stop() method on time.Timer, but doesn't (yet) add
support for the Reset() method.
The implementation has been carefully written so that programs that
don't use these timers will normally not see an increase in RAM or
binary size. None of the examples in the drivers repo change as a result
of this commit. This comes at the cost of slightly more complex code and
possibly slower execution of the timers when they are used.
You can see that it works with the following command:
tinygo run -target=simavr ./testdata/recover.go
This also gets the following tests to pass again:
go test -run=Build -target=simavr -v
Adding support for AVR was a bit more compliated because it's also
necessary to save and restore the Y register.
This change adds support for compiler-rt, which supports float64 (unlike
libgcc for AVR). This gets a number of tests to pass that require
float64 support.
We're still using libgcc with this change, but libgcc will probably be
removed eventually once AVR support in compiler-rt is a bit more mature.
I've also pushed a fix for a small regression in our
xtensa_release_14.0.0-patched LLVM branch that has also been merged
upstream. Without it, a floating point comparison against zero always
returns true which is certainly a bug. It is necessary to correctly
print floating point values.
This patch changes two things:
1. It changes the default stack size. Without this change, the
goroutine.go test doesn't pass (apparently there's some memory
corruption).
2. It moves the excluded tests so that they are skipped with a regular
`-target=simavr`, not just when running all tests (without
`-target`).
This matches the flash-command and is generally a bit easier to work
with.
This commit also prepares for allowing multiple formats to be used in
the emulator command, which is necessary for the esp32.
This means that we don't need duplicate code to pass parameters to
wasmtime and that the following actually produces verbose output (it
didn't before this commit):
tinygo test -v -target=cortex-m-qemu math
Refactor the code that runs a binary. With this change, the slightly
duplicated code between `tinygo run` and `TestBuild` is merged into one.
Apart from deduplication (which doesn't even gain much in terms of lines
removed), it makes it much easier to maintain this code. In particular,
passing command line arguments to programs to run now becomes trivial.
A future change might also merge `buildAndRun` and `runPackageTest`,
which currently have some overlap. In particular, flags like `-test.v`
don't need to be special-cased for wasmtime.
This change updates the test runner to use exec.CommandContext for timeout handling.
The timeout has been raised to 1 minute to handle slow machines and (hopefully) Windows.
The test run also now acquires the semaphore to reserve CPU time for the test and (hopefully?????) reduce the number of timeouts in Windows CI.
The AVR backend has several critical atomics bugs.
This change invokes libcalls for all atomic operations on AVR.
Now `testdata/atomic.go` compiles and runs correctly.
Ayke van Laethem
L. Pereira
Damian Gryski
Randy Reddig
Kenneth Bell
Elliott Sales de Andrade
José Carlos Chávez
Dan Kegel
Ron Evans
Nia Waldvogel