This commit replaces most panics in interp/frame.go and interp/scan.go
with real error messages. The remaining ones are panics that should not
happen when working with valid IR.
This kind of code might be generated by the switch implementation of
func values. The func value is represented as a ptrtoint, and before
calling it, it is compared against 0.
This commit improves error reporting in several ways:
* Location information is read from the intruction that causes the
error, as far as that's available.
* The package that is being interpreted is included in the error
message. This may be the most useful part of the improvements.
* The hashmap update intrinsics now doesn't panic, instead it logs a
clear error (with location information, as in the above two bullet
points).
This is possible thanks to improvements in LLVM 9. This means that after
this change, TinyGo will depend on LLVM 9.
The default Go version is 1.12. Because Go 1.13 introduced language
changes (improved numeric constants), TinyGo compiled with Go 1.12
cannot handle Go 1.13 code such as the Go 1.13 standard library.
Use Go 1.13 to build TinyGo on Azure Pipelines to fix this.
This implementation is still very limited but provides a base to build
upon. Limitations:
* CGO_CFLAGS etc is not taken into account.
* These CFLAGS are not used in C files compiled with the package.
* Other flags (CPPFLAGS, LDFAGS, ...) are not yet implemented.
This commit adds tests for CGo preprocessing. There are various errors
that can be reported while preprocessing, and they should integrate well
with the compiler (including accurate source location tracking).
Also allow CGo preprocessing to continue after Clang encountered an
error, for a better view of what happened.
The Cortex-M architecture contains two stack pointers, designed to be
used by RTOSes: MSP and PSP (where MSP is the default at reset). In
fact, the ARM documentation recommends using the PSP for tasks in a
RTOS.
This commit switches to using the PSP for goroutine stacks. Aside from
being the recommended operation, this has the big advantage that the
NVIC automatically switches to the MSP when handling interrupts. This
avoids having to make every goroutine stack big enough that interrupts
can be handled on it.
Additionally, I've optimized the assembly code to save/restore registers
(made possible by this change). For Cortex-M3 and up, saving all
registers is just a single push instruction and restoring+branching is a
single pop instruction. For Cortex-M0 it's a bit more work because the
push/pop instructions there don't support most high registers.
Sidenote: the fact that you can pop a number of registers and branch at
the same time makes ARM not exactly a true RISC system. However, it's
very useful in this case.
In my excitement to get the SoftDevice PR ready, I made two mistakes.
They're fixed in this commit.
* Add the `s132v6` build tag.
* Remove the (old) `ldscript` property.
This fixes the following issue:
https://github.com/aykevl/go-bluetooth/issues/1
This code is required by transformation passes which are being moved
into a separate package, but is too complicated to simply copy.
Therefore, I decided to move them into a new package.
We don't need the separate submodule: compiler-rt is already included in
the llvm-project repository.
This should hopefully make CI slightly faster too.
The header detection code failed way too easily, bailing out when there
was more than one Clang version directory.
This fixes the following problem in LLVM 9 on Debian:
testdata/cgo/main.h:1:10: fatal: 'stdbool.h' file not found
testdata/cgo/main.go:5:10: note: in file included from testdata/cgo/main.go!cgo.c:3:
This flag is overloaded. It can be used in two ways:
* Choosing the flash method to use (openocd, msd, command).
* Choosing the OpenOCD programmer name.
For example, you can use one of these to use OpenOCD instead of the
mass-storage device programmer:
tinygo flash -target=microbit -programmer=openocd
tinygo flash -target=microbit -programmer=cmsis-dap
This prevents it from being of type PROGBITS in lld 9, it should always
be NOBITS. It should fix the following error in lld 9:
ROM segments are non-contiguous
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.
This function adjusts the time returned by time.Now() and similar
functions. This is necessary on bare metal systems, where there would
not be a way to adjust the time otherwise.
When this flag is set, the testdata/*.out.go files will be updated when
they have changed. This is very convenient for updating these files
after the expected output changes.
Of course, the updated output must still be checked for validity.
Instead of putting the magic in the AST, generate regular accessor
methods. This avoids a number of special cases in the compiler, and
avoids missing any of them.
The resulting union accesses are somewhat clunkier to use, but the
compiler implementation has far less coupling between the CGo
implementation and the IR generator.
Not all enums may be used as a type anywhere, which was previously the
only way to include an enum in the AST. This commit makes sure all enums
are included.
This commit renames reserved field names like `type` to `_type`, and in
turn renames those fields as well (recursively). This avoids name
clashes when a C struct contains a field named `type`, which is a
reserved keyword in Go.
For some details, see:
https://golang.org/cmd/cgo/#hdr-Go_references_to_C
Previously it was just a combination of heuristics to try to fit a
constant in an *ast.BasicLit. For more complex expressions, this is not
enough.
This change also introduces proper syntax error with locations, if
parsing a constant failed. For example, this will print a real error
message with source location:
#define FOO 5)
