With the new buildmodes c-archive and c-shared, it is possible for a
cgo call to come in early in the lifecycle of a Go program. Calls
before the runtime has been initialized are caught by
_cgo_wait_runtime_init_done. However a call can come in after the
runtime has initialized, but before the program's package init
functions have finished running.
To avoid this cgocallback checks m.ncgo to see if we are on a thread
running Go. If not, we may be a foreign thread and it blocks until
main_init is complete.
Change-Id: I7a9f137fa2a40c322a0b93764261f9aa17fcf5b8
Reviewed-on: https://go-review.googlesource.com/8897
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: David Crawshaw <crawshaw@golang.org>
Avoids shadowing the builtin channel close function.
Change-Id: I7a729b0937c8248fe27222be61318a88db995eee
Reviewed-on: https://go-review.googlesource.com/8898
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: David Crawshaw <crawshaw@golang.org>
call unreadByteStuffedByte.
If ensureNBits was due to an io.EOF that was translated to
jpeg.errShortHuffmanData, then we may have read no bytes, so there is no
byte-stuffed-byte to unread.
Fixes#10387
Change-Id: I39a3842590c6cef2aa48943288d52f603338b44d
Reviewed-on: https://go-review.googlesource.com/8841
Reviewed-by: Rob Pike <r@golang.org>
The memory model has been clarified since. This is legal and doesn't
need justification.
Change-Id: I60f9938503f86f52bb568ca1a99ac721ee72cee5
Reviewed-on: https://go-review.googlesource.com/8913
Reviewed-by: Mikio Hara <mikioh.mikioh@gmail.com>
Already supported platforms are linux/amd64 and android/arm.
Running -buildmode=c-shared on linux/arm is equivalent to:
-ldflags "-shared" -asmflags "-shared"
Change-Id: Ifdb267f1d6508157f236be912fa369440172d161
Reviewed-on: https://go-review.googlesource.com/8895
Reviewed-by: David Crawshaw <crawshaw@golang.org>
On darwin, /tmp and /var directories are usually linked to /private.
% cd $TMPDIR; pwd -L
/var/.../T
% pwd -P
/private/var/.../T
Change-Id: I277ff2d096344d9a80e6004a83e9fc3e1716348c
Reviewed-on: https://go-review.googlesource.com/8842
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Follows http://golang.org/cl/8454, a similar CL for arm architectures.
This CL involves android-specific changes, namely, synthesizing
argv/auxv, as android doesn't provide those to the init functions.
This code is based on crawshaw@ android code in golang.org/x/mobile.
Change-Id: I32364efbb2662e80270a99bd7dfb1d0421b5417d
Reviewed-on: https://go-review.googlesource.com/8457
Reviewed-by: David Crawshaw <crawshaw@golang.org>
The documentation is clear that formats like %02x applied to a
byte slice are per-element, so the result should be nothing if the
slice is empty. It's not, because the top-level padding routine is called.
It shouldn't be: the loop does the padding for us.
Fixes#10430.
Change-Id: I04ea0e804c0f2e70fff3701e5bf22acc90e890da
Reviewed-on: https://go-review.googlesource.com/8864
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Fixes#10092
This change makes it possible to use gccgo 5 as the GOROOT_BOOTSTRAP
compiler.
Change-Id: Ie3a312781ac1a09ea77f95b5a78c9488d437e0aa
Reviewed-on: https://go-review.googlesource.com/8809
Run-TryBot: Dave Cheney <dave@cheney.net>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
The -lldb flag makes it easy to use go run and end up in a debugging
session on darwin/arm.
Change-Id: I556f93e950086a7dff4839f301b9c55f7579f87b
Reviewed-on: https://go-review.googlesource.com/8024
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
Adds the runtime initialization flow for arm akin to amd64.
In particular,we use the library initialization entry point to:
- create a new OS thread and run the "regular" runtime init stack on
that thread
- return immediately from the main (i.e., loader) thread
- at the first CGO invocation, we wait for the runtime initialization
to complete.
Verified to work on a Raspberry Pi and an Android phone.
Change-Id: I32f39228ae30a03ce9569287f234b305790fecf6
Reviewed-on: https://go-review.googlesource.com/8455
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Run-TryBot: Srdjan Petrovic <spetrovic@google.com>
Related to issue #10410
For some reason, any non-trivial code in _cgo_wait_runtime_init_done
(even fprintf()) will crash that call.
If anybody has any guess why this is happening, please let me know!
For now, I'm clearing the functions for ppc64, as it's currently not used.
Change-Id: I1b11383aaf4f9f9a16f1fd6606842cfeedc9f0b3
Reviewed-on: https://go-review.googlesource.com/8766
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Run-TryBot: Srdjan Petrovic <spetrovic@google.com>
This is friendlier for manual runs and personal devices.
Builders will pass -restart.
Fixes#10333.
Change-Id: Ia64c8f1660e275b5a1543d7f81f5f5efb623182f
Reviewed-on: https://go-review.googlesource.com/8870
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Just like darwin/arm.
Change-Id: Ibaba67980db6e05aa71568199b2dac2fcaa86fd6
Reviewed-on: https://go-review.googlesource.com/8824
Reviewed-by: Minux Ma <minux@golang.org>
Just like darwin/arm.
Change-Id: I5ed26975670d4189a46b585a56c66c199905d168
Reviewed-on: https://go-review.googlesource.com/8823
Reviewed-by: Minux Ma <minux@golang.org>
Just like darwin/arm.
Change-Id: Ic75927bd6457d37cda7dd8279fd9b4cd52edc1d1
Reviewed-on: https://go-review.googlesource.com/8813
Reviewed-by: Minux Ma <minux@golang.org>
Just like darwin/arm, the test devices can only install and execute
a single app at a time.
Change-Id: I74e6130ef83537c465b4585a366d02953fd907bf
Reviewed-on: https://go-review.googlesource.com/8827
Reviewed-by: Minux Ma <minux@golang.org>
Like other arm64 platforms, darwin/arm64 has a different physical
page size to logical page size so it is running into issue 9993. I
hope it can be fixed for Go 1.5, but for now it is demonstrating the
same bug as the other skipped os+arch combinations.
Change-Id: Iedaf9afe56d6954bb4391b6e843d81742a75a00c
Reviewed-on: https://go-review.googlesource.com/8814
Reviewed-by: Minux Ma <minux@golang.org>
Just like darwin/arm.
Change-Id: Ib0438021bfe9eb105222b93e5bb375c282cc7b8c
Reviewed-on: https://go-review.googlesource.com/8822
Reviewed-by: Minux Ma <minux@golang.org>
Just like darwin/arm.
Change-Id: Ic5c6c0b2fdbb89f4579677e120a8f2dbf300e5b9
Reviewed-on: https://go-review.googlesource.com/8820
Reviewed-by: Minux Ma <minux@golang.org>
Just like darwin/arm.
Change-Id: I1a9f51c572c14b78d35ea62f52927f2bdc46e4c0
Reviewed-on: https://go-review.googlesource.com/8821
Reviewed-by: Minux Ma <minux@golang.org>
Just like darwin/arm.
Change-Id: Ia8c912e91259a5073aa3ab2b6509a18aa9a1fce7
Reviewed-on: https://go-review.googlesource.com/8818
Reviewed-by: Minux Ma <minux@golang.org>
Just like darwin/arm.
Change-Id: I4b0ab4a104f2c8a821ca8b5fa8d266e51883709f
Reviewed-on: https://go-review.googlesource.com/8816
Reviewed-by: Minux Ma <minux@golang.org>
Just like darwin/arm.
Change-Id: Ie4998d24b2d891a9f6c8047ec40cd3fdf80622cd
Reviewed-on: https://go-review.googlesource.com/8812
Reviewed-by: Minux Ma <minux@golang.org>
Just like darwin/arm.
Change-Id: Ib9a32bb0aed5f08b27de11a93aaf273cacdf5779
Reviewed-on: https://go-review.googlesource.com/8819
Reviewed-by: Minux Ma <minux@golang.org>
Previously, running
$ go get -u -v golang.org/x/tools/cmd/godoc
would results in dozens of HTTP requests for
https://golang.org/x/tools?go-get=1
once per package under x/tools.
Now it caches the results. We still end up doing one HTTP request for
all the packages under x/tools, but this reduces the total number of
HTTP requests in ~half.
This also moves the singleflight package back into an internal
package. singleflight was originally elsewhere as a package, then got
copied into "net" (without its tests). But now that we have internal,
put it in its own package, and restore its test.
Fixes#9249
Change-Id: Ieb5cf04fc4d0a0c188cb957efdc7ea3068c34e3f
Reviewed-on: https://go-review.googlesource.com/8727
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
The background index in the global palette (located in the image.Config)
is necessary for interpreting GIF frames properly
Frame disposal information is necessary for interpreting GIF frames in
the context of a sequence (or animation)
Removes decoder.flags as it can be a local variable
Change-Id: I6790a7febf6ba0859175c834c807bc6413e6b194
Reviewed-on: https://go-review.googlesource.com/4620
Reviewed-by: Nigel Tao <nigeltao@golang.org>
Float type from a mutex to atomic bit array in a manner akin to
Google Guava's AtomicDouble[0], including adding a benchmark for the
type (benchcmp included below) along with some expvar_test.go cruft
being fixed.
benchmark old ns/op new ns/op delta
BenchmarkFloatSet 115 9.37 -91.85%
BenchmarkFloatAdd 114 17.1 -85.00%
benchmark old allocs new allocs delta
BenchmarkFloatSet 0 0 +0.00%
BenchmarkFloatAdd 0 0 +0.00%
benchmark old bytes new bytes delta
BenchmarkFloatSet 0 0 +0.00%
BenchmarkFloatAdd 0 0 +0.00%
[0] - http://goo.gl/m4dtlI
Change-Id: I4ce6a913734ec692e3ed243f6e6f7c11da4c6036
Reviewed-on: https://go-review.googlesource.com/3687
Reviewed-by: Rob Pike <r@golang.org>
This test checks the working directory is
always consistent after Chdir in a Go program.
Fixes#10035.
Change-Id: I6abf0e4fcd40680ee572c6b40fc52ab17ef38d54
Reviewed-on: https://go-review.googlesource.com/6382
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: David du Colombier <0intro@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
In Plan 9, goroutines can run in different processes,
which don't share their working directory. However,
Go expects the working directory to be program-wide.
We use a Fixwd function to fix the working directory
before calling system calls which depend on the
working directory.
In fixwdLocked, the working directory is not fixed
when getwd returns an error. However, an error can
happen is some cases, notably when the directory
has been previously removed in another process.
Fixes#10422.
Change-Id: Ie0c36f97c4b5ebe27ff0ead360987c5b35f825e4
Reviewed-on: https://go-review.googlesource.com/8800
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Currently, Entry has a Val method that looks up an attribute and
returns its value. Now that Field has more fields than the attribute
and its value, it's useful to return the whole Field and let the
caller retrieve the parts it needs.
This change adds an AttrField method to Entry that does the same
lookup at Val, but returns the whole *Field rather than just the
value.
Change-Id: Ic629744c14c0e09d7528fa1026b0e1857789948c
Reviewed-on: https://go-review.googlesource.com/8503
Reviewed-by: Ian Lance Taylor <iant@golang.org>
To return DWARF attribute values, debug/dwarf maps the DWARF attribute
value classes to Go types. Unfortunately, this mapping is ambiguous in
a way that makes it impossible to correctly interpret some DWARF
attributes as of DWARF 4. For example, AttrStartScope can be either a
constant or a rangelistptr. The attribute is interpreted differently
depending on its class, but debug/dwarf maps both classes to int64, so
the caller can't distinguish them from the Go type.
AttrDataMemberLocation is similar.
To address this, this change adds a field to type Field that indicates
the exact DWARF attribute value class of that field's value. This
makes it possible to distinguish value classes that can't be
distinguished by their Go type alone.
The root of this type ambiguity was DWARF itself. For example, DWARF 2
made no distinction between constants that were just constants and
constants that were section offsets because no attribute could have
both meanings. Hence, the single int64 type was sufficient. To avoid
introducing just another layer of ambiguity, this change takes pains
to canonicalize ambiguous classes in DWARF 2 and 3 files into the
unambiguous classes of DWARF 4.
Of course, there's no guarantee that future DWARF versions won't do
the same thing again and further subdivide the DWARF 4 classes. This
change gets ahead of this somewhat by distinguishing the various *ptr
classes even though the encoding does not. If there's some other form
of split, we can handle this in a backwards-compatible way by
introducing, for example, a Class5 field and type.
Change-Id: I4ef96d1223b0fd7f96ecf44fcc0e704a36af02b4
Reviewed-on: https://go-review.googlesource.com/8502
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Uses ar to create an archive when -buildmode=c-archive.
A small example (that I hope to turn into a test in a later CL):
goarchive.go:
package main
import "fmt"
import "C"
func init() {
fmt.Println("ran go init")
}
//export FuncInGo
func FuncInGo() {
fmt.Println("called a go function")
}
func main() {
fmt.Println("in main")
}
This can be compiled with:
go build -ldflags=-buildmode=c-archive -o=libgo.a goarchive.go
main.c:
#include <stdio.h>
extern void FuncInGo();
int main(void) {
printf("c hello\n");
FuncInGo();
printf("c goodbye\n");
return 0;
}
Can be compiled with:
cc main.c libgo.a
Apple provide a warning about the lack of PIE, but still produce a
binary which runs and outputs (on darwin/amd64):
c hello
ran go init
called a go function
c goodbye
Change-Id: I7611925f210a83afa6bd1e66a5601dd636a428c8
Reviewed-on: https://go-review.googlesource.com/8711
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Tested by using -buildmode=c-archive to generate an archive, add it
to an Xcode project and calling a Go function from an iOS app. (I'm
still investigating proper buildmode tests for all.bash.)
Change-Id: I7890df15246df8e90ad27837b8d64ba2cde409fe
Reviewed-on: https://go-review.googlesource.com/8719
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Just like darwin/arm.
Change-Id: Ia84662f58f6b1bb168cce8a9837945b1cbd175e1
Reviewed-on: https://go-review.googlesource.com/8828
Reviewed-by: Minux Ma <minux@golang.org>
Just like darwin/arm, cannot fork..
Change-Id: If565afbceb79013b9e3103e1e28d93691e9fc0a5
Reviewed-on: https://go-review.googlesource.com/8826
Reviewed-by: Minux Ma <minux@golang.org>
Just like darwin/arm.
Change-Id: Iadc30b7307ae56fd4f8a681d49672bed7ca6966f
Reviewed-on: https://go-review.googlesource.com/8810
Reviewed-by: Minux Ma <minux@golang.org>
Just like darwin/arm.
Change-Id: Iabb6282f18548da43117ee60f7ad6e272502f09d
Reviewed-on: https://go-review.googlesource.com/8825
Reviewed-by: Minux Ma <minux@golang.org>
Just like darwin/arm.
Change-Id: Ib64a3e8ff11249a20b0208bd3b900db318c682b7
Reviewed-on: https://go-review.googlesource.com/8817
Reviewed-by: Minux Ma <minux@golang.org>
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
