This is a big change that will determine the stack size for many
goroutines automatically. Functions that aren't recursive and don't call
function pointers can in many cases have an automatically determined
worst case stack size. This is useful, as the stack size is usually much
lower than the previous hardcoded default of 1024 bytes: somewhere
around 200-500 bytes is common.
A side effect of this change is that the default stack sizes (including
the stack size for other architectures such as AVR) can now be changed
in the config JSON file, making it tunable per application.
This makes it easy to test one particular architecture, for example:
go test -v -target=hifive1-qemu
This speeds up testing and allows testing targets that are not included
in the test by default (such as RISC-V tests on Linux).
This is necessary to avoid a circular dependency in the loader (which
soon will need to read the Go version) and because it seems like a
better place anyway.
See commit:
54e6ba6724
Warning: this will drop support for Go 1.13 for WebAssembly targets!
I have modified the integration tests to specifically blacklist Go 1.13
instead of whitelisting any other version, to avoid accidentally not
testing WebAssembly.
This is necessary because LLVM defines many options in global variables
that are modified when invoking Clang. In particular, LLVM 10 seems to
have a bug in which it always sets the -pgo-warn-misexpect flag. Setting
it multiple times (over various cc1 invocations) results in an error:
clang (LLVM option parsing): for the --pgo-warn-misexpect option: may only occur zero or one times!
This is fixed by running the Clang invocation in a new `tinygo`
invocation.
Because we've had issues with lld in the past, also run lld in a
separate process so similar issues won't happen with lld in the future.
This should avoid the rather frequent "test ran too long,
terminating..." error message that often occurs in CI and when running
`go test` manually. Apparently I was too optimistic: some tests take
longer than 1 second to run.
This commit switches integration tests to use the same error reporting
mechanism as the tinygo compiler normally uses. It replaces errors like
this:
main_test.go:139: failed to build: interp: branch on a non-constant
With this:
main.go:693: # math/rand
main.go:695: interp: branch on a non-constant
In this particular case the error isn't much better (it gives the
relevant package, though) but other errors should also include the
source location where they happen.
Use the cross compiling toolchains for compiling/linking. This fixes CGo
support, and therefore allows CGo to be used when cross compiling to
Linux on a different architecture.
This commit also removes some redundant testing code.
This caused most tests to run the zeroalloc.go test instead of what they
should have been tested, and in turn explains most of the performance
gains of parallel testing.
This commit fixes it by avoiding race conditions. Luckily, no tests
started failing since then due to this.
Sometimes, tests suddenly hang somewhere (in particular in emulators
where crashes often lead to hangs). Setting a limit has two advantages:
1. Quickly killing test processes that are frozen (as opposed to
waiting for the default 10min go test timeout).
2. The output becomes visible, hopefully giving a clue what went
wrong.
Eventually, open files should be closed when the GC runs and the
finalizer is called. However we shouldn't rely on that.
Using `ioutil.ReadFile` as it's a simpler pattern anyway.
This is a large commit that moves all code directly related to
compiling/linking into a new builder package. This has a number of
advantages:
* It cleanly separates the API between the command line and the full
compilation (with a very small API surface).
* When the compiler finally compiles one package at a time (instead of
everything at once as it does now), something will have to invoke it
once per package. This builder package will be the natural place to
do that, and also be the place where the whole process can be
parallelized.
* It allows the TinyGo compiler to be used as a package. A client can
simply import the builder package and compile code using it.
As part of this refactor, the following additional things changed:
* Exported symbols have been made unexported when they weren't needed.
* The compilation target has been moved into the compileopts.Options
struct. This is done because the target really is just another
compiler option, and the API is simplified by moving it in there.
* The moveFile function has been duplicated. It does not really belong
in the builder API but is used both by the builder and the command
line. Moving it into a separate package didn't seem useful either
for what is essentially an utility function.
* Some doc strings have been improved.
Some future changes/refactors I'd like to make after this commit:
* Clean up the API between the builder and the compiler package.
* Perhaps move the test files (in testdata/) into the builder package.
* Perhaps move the loader package into the builder package.
The WebAssembly target is not yet considered stable in LLVM 7, but has
been enabled in the Debian builds so tests can run on Debian. However,
the Homebrew builds don't have it enabled which results in test
failures.
Temporarily run WebAssembly tests only on Linux to fix this. This can be
reverted after a switch to LLVM 8, which has WebAssembly enabled by
default.
The interp package does a much better job at interpretation, and is
implemented as a pass on the IR which makes it much easier to compose.
Also, the implementation works much better as it is based on LLVM IR
instead of Go SSA.
This interpreter currently complements the Go SSA level interpreter. It
may stay complementary or may be the only interpreter in the future.
This interpreter is experimental and not yet finished (there are known
bugs!) so it is disabled by default. It can be enabled by passing the
-initinterp flag.
The goal is to be able to run all initializations at compile time except
for the ones having side effects. This mostly works except perhaps for a
few edge cases.
In the future, this interpeter may be used to actually run regular Go
code, perhaps in a shell.
The list of options passed to build/run/gdb/etc commands was getting
unwieldly and hard to add extra options to. Put all common build options
in a single build config struct so that these options are more
centralized.
Ayke van Laethem
Jaden Weiss
Jaden Weiss