gcc/libgo
Ian Lance Taylor 313890530c runtime: eliminate scase.kind field
This is the gofrontend version of https://golang.org/cl/245125.

Original CL description:

    Currently, we include a "kind" field on scase to distinguish the three
    kinds of cases in a select statement: sends, receives, and defaults.

    This commit removes by kind field by instead arranging for the
    compiler to always place sends before receives, and to provide their
    counts separately. It also passes an explicit "block bool" parameter
    to avoid needing to include a default case in the array.

    It's safe to shuffle cases like this because the runtime will
    randomize the order they're polled in anyway.

    For golang/go#40410.

This is being brought over to gofrontend as a step toward upgrading to
Go1.16beta1.

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/279735
2020-12-22 14:42:22 -08:00
..
config re PR bootstrap/82856 (--enable-maintainter-mode broken by incompatiblity of gcc's required automake and modern Perl) 2018-10-31 20:46:17 +00:00
go runtime: eliminate scase.kind field 2020-12-22 14:42:22 -08:00
misc/cgo libgo: update to Go 1.15.5 release 2020-11-20 17:09:30 -08:00
runtime libgo: update to 1.15.6 release 2020-12-08 14:01:04 -08:00
testsuite compiler, libgo: change mangling scheme 2020-11-20 12:44:35 -08:00
aclocal.m4 libgo: handle --with-toolexeclibdir=. 2020-01-24 06:33:46 -08:00
check-packages.txt cmd/go, cmd/cgo: update gofrontend mangling checks 2020-11-17 18:32:07 -08:00
config.h.in libgo: handle linking to NetBSD's versioned symbols 2020-10-28 18:20:50 -07:00
configure compiler, libgo: change mangling scheme 2020-11-20 12:44:35 -08:00
configure.ac compiler, libgo: change mangling scheme 2020-11-20 12:44:35 -08:00
goarch.sh libgo: update to Go 1.13beta1 release 2019-09-06 18:12:46 +00:00
godeps.sh libgo: update to Go1.10beta1 2018-01-09 01:23:08 +00:00
gotool-packages.txt cmd/go, cmd/cgo: update gofrontend mangling checks 2020-11-17 18:32:07 -08:00
libgo-packages.txt libgo: update to go1.15rc1 2020-08-01 11:21:40 -07:00
libgo.imp Big merge of changes to gofrontend repo that were postponed due to the 2017-05-10 17:26:09 +00:00
LICENSE
Makefile.am compiler: defer to middle-end for complex division 2020-12-03 08:21:02 -08:00
Makefile.in compiler: defer to middle-end for complex division 2020-12-03 08:21:02 -08:00
match.sh libgo: handle go1.10+ correctly in match.sh 2020-10-07 12:25:37 -07:00
MERGE libgo: update to 1.15.6 release 2020-12-08 14:01:04 -08:00
merge.sh libgo: update to Go1.15.2 release 2020-09-23 17:32:49 -07:00
mklinknames.awk libgo: handle linking to NetBSD's versioned symbols 2020-10-28 18:20:50 -07:00
mkrsysinfo.sh libgo: adjust sysinfo scripts for changed -fdump-go-spec 2020-12-20 20:16:50 -08:00
mkruntimeinc.sh compile, runtime: permit anonymous and empty fields in C header 2019-08-30 21:49:49 +00:00
mksigtab.sh libgo: add configury and sysinfo support for hurd 2019-02-01 22:46:39 +00:00
mksysinfo.sh libgo: adjust sysinfo scripts for changed -fdump-go-spec 2020-12-20 20:16:50 -08:00
mvifdiff.sh
PATENTS
README libgo: add Debugging section to README 2019-05-08 22:07:40 +00:00
README.gcc
sysinfo.c libgo: adjust sysinfo scripts for changed -fdump-go-spec 2020-12-20 20:16:50 -08:00
VERSION libgo: update to 1.15.6 release 2020-12-08 14:01:04 -08:00

See ../README.

This is the runtime support library for the Go programming language.
This library is intended for use with the Go frontend.

This library should not be stripped when it is installed.  Go code
relies on being able to look up file/line information, which comes
from the debugging info using the libbacktrace library.

The library has only been tested on GNU/Linux using glibc, and on
Solaris.  It should not be difficult to port to other operating
systems.

Directories:

go
  A copy of the Go library from http://golang.org/, with several
  changes for gccgo.

runtime
  Runtime functions, written in C, which are called directly by the
  compiler or by the library.

Contributing
============

To contribute patches to the files in this directory, please see
http://golang.org/doc/gccgo_contribute.html .

The master copy of these files is hosted at
http://code.google.com/p/gofrontend .  Changes to these files require
signing a Google contributor license agreement.  If you are the
copyright holder, you will need to agree to the individual contributor
license agreement at
http://code.google.com/legal/individual-cla-v1.0.html.  This agreement
can be completed online.

If your organization is the copyright holder, the organization will
need to agree to the corporate contributor license agreement at
http://code.google.com/legal/corporate-cla-v1.0.html.

If the copyright holder for your code has already completed the
agreement in connection with another Google open source project, it
does not need to be completed again.

Debugging
=========

This describes how to test libgo when built as part of gccgo.

To test a specific package, cd to the libgo build directory
(TARGET/libgo) and run `make PKG/check`.  For example, `make
bytes/check`.

To see the exact commands that it runs, including how the compiler is
invoked, run `make GOTESTFLAGS=--trace bytes/check`.  This will
display the commands if the test fails.  If the test passes, the
commands and other output will be visible in a file named
check-testlog in a subdirectory with the name of the package being
checked.  In the case of bytes/check, this will create
bytes/check-testlog.

To leave the test program behind, run `make GOTESTFLAGS=--keep
bytes/check`.  That will leave a gotestNNNN/test directory in the
libgo build directory.  In that directory you can run
`LD_LIBRARY_PATH=../../.libs ./a.out -test.short` to run the tests.
You can run specific failing tests using a -test.run option.  You can
see the tests being run with the -test.v option.  You can run the
program under a debugger such as gdb.