Gobind uses strings for passing errors across the language barrier.
However, since Gobind doesn't have a concept of a nil string, it
can't separate an empty native string from a nil string.
In turn, that means that empty errors, exceptions or NSError * with
an empty description are treated as no error. With ObjC, empty errors
are replaced with a default string to workaround the issue, while
with Java empty errors are silently ignored.
Fix this by replacing strings with actual error objects, wrapping
the Go error, Java Throwable or ObjC NSError *, and letting the
existing bind machinery take care of passing the references across.
It's a large change for a small corner case, but I believe objects
are a better fit for exception that strings. Error objects also
naturally leads to future additions, for example accessing the
exception class name or chained exception.
Change-Id: Ie03b47cafcb231ad1e12a80195693fa7459c6265
Reviewed-on: https://go-review.googlesource.com/24100
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Multiple packages are already supported, but only as if each packages
were bound in isolation. This CL lets a bound package refer to other
bound packages in its exported functions, types and fields.
In Java, the JNI class jclass and constructor jmethodID are exported
so other packages can construct proxies of other packages' interfaces.
In ObjC, the class @interface declarations are moved from the package
.m file to its .h file to allow other packages to constructs its
interface proxies.
Add a supporting test package, secondpkg, and add Java and ObjC tests
for the new cross package functionality. Also add simplepkg for
testing corner cases where the generated Go file must not include its
bound package.
While we're here, stop generating Go proxy types for struct types;
only Go interfaces can be implemented in the foreign language.
Change-Id: Icbfa739c893703867d38a9100ed0928fbd7a660d
Reviewed-on: https://go-review.googlesource.com/20575
Reviewed-by: David Crawshaw <crawshaw@golang.org>
The seq serialization machinery is a historic artifact from when Go
mobile code had to run in a separate process. Now that Go code is running
in-process, replace the explicit serialization with direct calls and pass
arguments on the stack.
The benefits are a much smaller bind runtime, much less garbage (and, in
Java, fewer objects with finalizers), less argument copying, and faster
cross-language calls.
The cost is a more complex generator, because some of the work from the
bind runtime is moved to generated code. Generated code now handles
conversion between Go and Java/ObjC types, multiple return values and memory
management of byte slice and string arguments.
To overcome the lack of calling C code between Go packages, all bound
packages now end up in the same (fake) package, "gomobile_bind", instead of
separate packages (go_<pkgname>). To avoid name clashes, the package name is
added as a prefix to generated functions and types.
Also, don't copy byte arrays passed to Go, saving call time and
allowing read([]byte)-style interfaces to foreign callers (#12113).
Finally, add support for nil interfaces and struct pointers to objc.
This is a large CL, but most of the changes stem from changing testdata.
The full benchcmp output on the CL/20095 benchmarks on my Nexus 5 is
reproduced below. Note that the savings for the JavaSlice* benchmarks are
skewed because byte slices are no longer copied before passing them to Go.
benchmark old ns/op new ns/op delta
BenchmarkJavaEmpty 26.0 19.0 -26.92%
BenchmarkJavaEmptyDirect 23.0 22.0 -4.35%
BenchmarkJavaNoargs 7685 2339 -69.56%
BenchmarkJavaNoargsDirect 17405 8041 -53.80%
BenchmarkJavaOnearg 26887 2366 -91.20%
BenchmarkJavaOneargDirect 34266 7910 -76.92%
BenchmarkJavaOneret 38325 2245 -94.14%
BenchmarkJavaOneretDirect 46265 7708 -83.34%
BenchmarkJavaManyargs 41720 2535 -93.92%
BenchmarkJavaManyargsDirect 51026 8373 -83.59%
BenchmarkJavaRefjava 38139 21260 -44.26%
BenchmarkJavaRefjavaDirect 42706 28150 -34.08%
BenchmarkJavaRefgo 34403 6843 -80.11%
BenchmarkJavaRefgoDirect 40193 16582 -58.74%
BenchmarkJavaStringShort 32366 9323 -71.20%
BenchmarkJavaStringShortDirect 41973 19118 -54.45%
BenchmarkJavaStringLong 127879 94420 -26.16%
BenchmarkJavaStringLongDirect 133776 114760 -14.21%
BenchmarkJavaStringShortUnicode 32562 9221 -71.68%
BenchmarkJavaStringShortUnicodeDirect 41464 19094 -53.95%
BenchmarkJavaStringLongUnicode 131015 89401 -31.76%
BenchmarkJavaStringLongUnicodeDirect 134130 90786 -32.31%
BenchmarkJavaSliceShort 42462 7538 -82.25%
BenchmarkJavaSliceShortDirect 52940 17017 -67.86%
BenchmarkJavaSliceLong 138391 8466 -93.88%
BenchmarkJavaSliceLongDirect 205804 15666 -92.39%
BenchmarkGoEmpty 3.00 3.00 +0.00%
BenchmarkGoEmptyDirect 3.00 3.00 +0.00%
BenchmarkGoNoarg 40342 13716 -66.00%
BenchmarkGoNoargDirect 46691 13569 -70.94%
BenchmarkGoOnearg 43529 13757 -68.40%
BenchmarkGoOneargDirect 44867 14078 -68.62%
BenchmarkGoOneret 45456 13559 -70.17%
BenchmarkGoOneretDirect 44694 13442 -69.92%
BenchmarkGoRefjava 55111 28071 -49.06%
BenchmarkGoRefjavaDirect 60883 26872 -55.86%
BenchmarkGoRefgo 57038 29223 -48.77%
BenchmarkGoRefgoDirect 56153 27812 -50.47%
BenchmarkGoManyargs 67967 17398 -74.40%
BenchmarkGoManyargsDirect 60617 16998 -71.96%
BenchmarkGoStringShort 57538 22600 -60.72%
BenchmarkGoStringShortDirect 52627 22704 -56.86%
BenchmarkGoStringLong 128485 52530 -59.12%
BenchmarkGoStringLongDirect 138377 52079 -62.36%
BenchmarkGoStringShortUnicode 57062 22994 -59.70%
BenchmarkGoStringShortUnicodeDirect 62563 22938 -63.34%
BenchmarkGoStringLongUnicode 139913 55553 -60.29%
BenchmarkGoStringLongUnicodeDirect 150863 57791 -61.69%
BenchmarkGoSliceShort 59279 20215 -65.90%
BenchmarkGoSliceShortDirect 60160 21136 -64.87%
BenchmarkGoSliceLong 411225 301870 -26.59%
BenchmarkGoSliceLongDirect 399029 298915 -25.09%
Fixesgolang/go#12619Fixesgolang/go#12113Fixesgolang/go#13033
Change-Id: I2b45e9e98a1248e3c23a5137f775f7364908bec7
Reviewed-on: https://go-review.googlesource.com/19821
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
This allows reuse of the code in custom gomobile bind tools.
Change-Id: I4e013ca871d0fa64983e7efb5e1e9dad8ac723c0
Reviewed-on: https://go-review.googlesource.com/18581
Reviewed-by: David Crawshaw <crawshaw@golang.org>
init command installs std for all the architectures supported by the
current go tool version (as listed in androidEnv).
build and bind commands pass the list of architectures to the underlying
functions. The list is currently hard-coded []string{"arm"}. In a
separate CL, the list will be populated from the -target flag value.
Still targets arm devices only.
For golang/go#10743
Change-Id: I62b5899859e76ad78a2dc55111e87aa13a68a1f9
Reviewed-on: https://go-review.googlesource.com/17749
Reviewed-by: David Crawshaw <crawshaw@golang.org>
This does not change the tool's behavior.
The global ndkConfig 'ndk' holds info on all supported architectures
with the latest Go and gomobile tools (tip), and provides Root and
Toolchain methods that returns the current NDK installation directory
and the toolchain info depending on the GOPATH and the current go
version.
The global androidEnv is a map from arch name to the env vars.
ndkccpath is replaced by ndk.Root.
For golang/go#10743
Change-Id: I70d8e7b3e9979836112eb82d50c468df4f4ab43f
Reviewed-on: https://go-review.googlesource.com/17720
Reviewed-by: David Crawshaw <crawshaw@golang.org>
As discussed in golang/go#12245
Usage: gomobile bind [options] a.b.c x.y.z
For java gobind and gomobile will generate go.c.C.java and go.z.Z.java.
If -javapkg=com.example is specified they will generate
com.example.C.java and com.example.Z.java.
Tested on Darwin.
Change-Id: Ia8e57c8fec7967131d55de71cc705d9e736ccca0
Reviewed-on: https://go-review.googlesource.com/17023
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
Replace the vendored version of x/tools/go/loader with the standard
library's go/importer package. This reads the export data from
$GOPATH/pkg/pkgname.a instead of parsing and type checking the source
code. The "go install" subcommand is invoked just prior to reading
the export data to make sure the export data is up to date.
Not yet tested on darwin, but working for android builds.
Change-Id: I24aa60aa46b843d30bc5833e3035699900bf3df4
Reviewed-on: https://go-review.googlesource.com/16913
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
New option -javapkg for -target=android, and -prefix for -target=ios.
Fixesgolang/go#9660.
Change-Id: I9143f30672672527876524b38f450629452a3161
Reviewed-on: https://go-review.googlesource.com/14023
Reviewed-by: David Crawshaw <crawshaw@golang.org>
In order to make the artifacts of go build command preserved under WORK
directory, this change modifies TMPDIR (TEMP/TMP for windows)
environment variables to point to gomobile's tmpdir if -work flag is set.
> gomobile init -work
WORK=/gopath/pkg/gomobile/work-276689736
> ls /gopath/pkg/gomobile/work-276689736
README go-build823903592 openal
android-ndk-r10e go-build858075903
go-build365743399 go-build921886344
> gomobile build -work golang.org/x/mobile/example/basic
WORK=/tmp/gomobile-work-863381843
> ls /tmp/gomobile-work-863381843
go-build102034516 libbasic.so
> gomobile bind -work github.com/hyangah/ivy
WORK=/tmp/gomobile-work-355100962
> ls /tmp/gomobile-work-355100962
android go-build284034365 javac-output
androidlib go_ivy
Change-Id: I2f467e0063bc1c8b8c636a8cd6d100e86a99a91a
Reviewed-on: https://go-review.googlesource.com/12720
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Tested:
go test golang.org/x/mobile/bind/java
gomobile bind -target={ios,android} github.com/hyangah/ivy
gobuild build -target={ios,android} golang.org/x/mobile/example/basic
(With various takes on -x and -v.)
Change-Id: I15c8f605490381feb6fefb482110f2a1c210529d
Reviewed-on: https://go-review.googlesource.com/12411
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
The goal here is to remove several inconsistencies between
-target=android and -target=ios support, along with making the flow
of the command follow the path you might expect given a certain set
of flags, and preparing for `gomobile bind` support of ios. In
particular, building non-main packages now works with both targets
and the initialization of global build state is clearer.
The reorg also is designed around an nm trick I thought of
yesterday to do better package import scanning without a slow
all-file scan. This will give better detection of x/mobile/app and
x/mobile/exp/audio/al packages. There's a TODO about it, and I'll do
it in a future CL.
Tested with:
go test golang.org/x/mobile/cmd/gomobile
gomobile init
gomobile bind golang.org/x/mobile/asset
go test golang.org/x/mobile/bind/java
gomobile build -target=ios golang.org/x/mobile/example/basic
gomobile build -target=ios golang.org/x/mobile/gl
gomobile build -target=android golang.org/x/mobile/gl
gomobile build -target=android golang.org/x/mobile/example/basic
(Along with manual testing of basic on an android device.)
That might make a pretty good _test.go.
Change-Id: I41230008c3c15db25a11c33b9eaca4abada9f411
Reviewed-on: https://go-review.googlesource.com/12051
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
