(Thanks to ken and rsc for pointing this out)
rsc:
ken pointed out that there's a race in the new
one-lock-per-channel code. the issue is that
if one goroutine has gone to sleep doing
select {
case <-c1:
case <-c2:
}
and then two more goroutines try to send
on c1 and c2 simultaneously, the way that
the code makes sure only one wins is the
selgen field manipulation in dequeue:
// if sgp is stale, ignore it
if(sgp->selgen != sgp->g->selgen) {
//prints("INVALID PSEUDOG POINTER\n");
freesg(c, sgp);
goto loop;
}
// invalidate any others
sgp->g->selgen++;
but because the global lock is gone both
goroutines will be fiddling with sgp->g->selgen
at the same time.
This results in a 7% slowdown in the single threaded case for a
ping-pong microbenchmark.
Since the cas predominantly succeeds, adding a simple check first
didn't make any difference.
R=rsc
CC=golang-dev
https://golang.org/cl/180068
* better error for lookup of unexported field
* do not assign "ideal string" type to typed string literal
* do not confuse methods and fields during interface check
Fixes#410.
Fixes#411.
Fixes#426.
R=ken2
https://golang.org/cl/179069
parsing and printing to new syntax.
Use -oldparser to parse the old syntax,
use -oldprinter to print the old syntax.
2) Change default gofmt formatting settings
to use tabs for indentation only and to use
spaces for alignment. This will make the code
alignment insensitive to an editor's tabwidth.
Use -spaces=false to use tabs for alignment.
3) Manually changed src/exp/parser/parser_test.go
so that it doesn't try to parse the parser's
source files using the old syntax (they have
new syntax now).
4) gofmt -w src misc test/bench
5th and last set of files.
R=rsc
CC=golang-dev
https://golang.org/cl/180050
Pull the struct into a single line, since 6g reports the error
on the last line of the struct definition and gccgo reports it
on the first line.
6g:
bug215.go:12: invalid recursive type A
gccgo:
bug215.go:12:6: error: invalid recursive type ‘A’
R=rsc
https://golang.org/cl/180044
This change removes the necessity to have GOBIN in $PATH,
and also doesn't assume that the build is being run from
$GOROOT/src. This is a minimal set of necessary changes
to get Go to build happily from the FreeBSD ports
collection.
R=rsc
CC=golang-dev
https://golang.org/cl/171044
- remove use of implicit string concatenation
- these appear to be the only files correctly compiling under test
that used implicit string concatenation
R=rsc
https://golang.org/cl/172043
the bash scripts and makefiles for building go didn't take into account
the fact $GOROOT / $GOBIN could both be directories containing whitespaces,
and was not possible to build it in such a situation.
this commit adjusts the various makefiles/scripts to make it aware of that
possibility, and now it builds successfully when using a path with whitespaces
as well.
Fixes#115.
R=rsc, dsymonds1
https://golang.org/cl/157067
* add runtime sliceslice1 for x[lo:]
* remove runtime arraytoslice, rewriting &arr into arr[0:len(arr)].
* port cgen_inline into 8g, 5g.
* use native memmove in maps
R=ken2
https://golang.org/cl/157106
* reverse-complement: port C algorithm to Go
saves 30% on my MacBook Pro and makes it a fairer comparison.
* test reverse-complement with and without GC (another 15%)
* revise timing.sh to work on more systems
* avoid two glibcisms in fasta.c
R=r
https://golang.org/cl/156110
