Replace linked list walk with memset.
This reduces CPU time taken by 'go install -a std' by ~10%.
Before:
real user sys
0m23.561s 0m16.625s 0m5.848s
0m23.766s 0m16.624s 0m5.846s
0m23.742s 0m16.621s 0m5.868s
after:
0m22.714s 0m14.858s 0m6.138s
0m22.644s 0m14.875s 0m6.120s
0m22.604s 0m14.854s 0m6.081s
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/13084043
pointer. An example that triggers the bad behavior on a 64bit
machine http://play.golang.org/p/GrNFakAYLN
rv1 := reflect.ValueOf(complex128(0))
rt := rv1.Type()
rv2 := rv1.Convert(rt)
rv3 := reflect.New(rt).Elem()
rv3.Set(rv2)
Running the code fails with the following:
panic: reflect: internal error: storeIword of 16-byte value
I've tested on a 64bit machine and verified this fixes the panic. I
haven't tested on a 32bit machine so I haven't verified the other
cases, but they follow logically.
R=golang-dev, r, iant
CC=golang-dev
https://golang.org/cl/12805045
Update #5000
Should reduce the flakiness a little. Malloc counting is important
to general testing but not to the build dashboard, which uses -short.
R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/12866047
Add eq, lt, etc. to allow one to do simple comparisons.
It's basic types only (booleans, integers, unsigned integers,
floats, complex, string) because that's easy, easy to define,
and covers the great majority of useful cases, while leaving
open the possibility of a more sweeping definition later.
{{if eq .X .Y}}X and Y are equal{{else}}X and Y are unequal{{end}}
R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/13091045
This is potentially an API-breaking change, but it is an important bug fix.
The CL https://golang.org/cl/7305072/ added stuff to make
the tar file look more like a file system internally, including providing an
implementation of os.FileInfo for the file headers within the archive.
But the code is incorrect because FileInfo.Name is supposed to return
the base name only; this implementation returns the full path. A round
trip test added in the same shows this in action, as the slashes are
preserved as we create a header using the local implementation of
FileInfo.
The CL here changes the behavior of the tar (and zip) FileInfo to honor
the Go spec for that interface. It also clarifies that the FileInfoHeader
function, which takes a FileInfo as an argument, will therefore create
a header with only the base name of the file recorded, and that
subsequent adjustment may be necessary.
There may be code out there that depends on the broken behavior.
We can call out the risk in the release notes.
Fixes#6180.
R=golang-dev, dsymonds, adg, bradfitz
CC=golang-dev
https://golang.org/cl/13118043
Some crashed, some didn't. Make a nil receiver always
return ErrInvalid rather than crash.
Fixes#5824.
The program in the bug listing is silent now, at least on my Mac.
R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/13108044
This has broken the 32-bit builds.
««« original CL description
cmd/gc, runtime: use type information to scan interface values
R=golang-dev, rsc, dvyukov
CC=golang-dev
https://golang.org/cl/12785045
»»»
R=khr, golang-dev, khr
CC=golang-dev
https://golang.org/cl/13010045
In the crash stack trace race cgocall() calls endcgo(),
this means that m->racecall is wrong.
Indeed this can happen is a goroutine is rescheduled to another M
during race call.
Disable preemption for race calls.
Fixes#6155.
R=golang-dev, rsc, cshapiro
CC=golang-dev
https://golang.org/cl/12866045
Before this CL, the import stack was a) not printed and b) overwritten later
in the build, destroying the information about the cycle. This CL fixes both.
I made time depend on os (os already depends on time) and with this CL the error is:
/Users/r/go/src/pkg/fmt/print.go:10:2: import cycle not allowed
package code.google.com/p/XXX/YYY:
imports fmt
imports os
imports time
imports os
Doesn't give line numbers for the actual imports, as requested in the bug, but
I don't believe that's important.
Fixes#4292.
R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/13100043
Given
if (i == 0)
x++
The old message was
x.go:6: syntax error: unexpected semicolon or newline before {
Now we see
x.go:6: syntax error: missing { after if clause
Fixes#5687
R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/12822045
Update #5305.
This handles the case where the nil pointers are inside a slice.
A top-level nil pointer is harder, maybe fundamentally broken by gob's model.
Thinking required.
However, a slice is the important case since people don't expect to be sending
top-level nils much, but they can arise easily in slices.
R=golang-dev, josharian, adg
CC=golang-dev
https://golang.org/cl/13042044
The shell's -e doesn't work across "eval"; need to error-check by hand.
The recent spate of Darwin build failures pointed out that if the first
run of cmd/dist fails, we keep going. We shouldn't.
R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/13098043
This might fix the mkdtemp problem on the darwin builders if they
have TMPDIR set to a path ending in a slash; at worse this will
result in cleaner path names.
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/13097043
The tar/archive code from golang has a problem with linknames with length >
100. A pax header is added but the original header still written with a too
long field length.
As it is clear that pax support is incomplete I have added missing
implementation parts.
This commit contains code from the golang project in the folder tar/archiv.
The following pax header records are now automatically written:
- gname)
- linkpath
- path
- uname
The following fields can be written with PAX, but the default is to use the
star binary extension.
- gid (value > 2097151)
- size (value > 8589934591)
- uid (value > 2097151)
The string fields are written when the value is longer as the field or if the
string contains a char that is not encodable as 7-bit ASCII value.
The change was tested against a current ubuntu-cloud image tarball comparing
the compressed result.
+ added some automated tests for the new functionality.
Fixes#6056.
R=dsymonds
CC=golang-dev
https://golang.org/cl/12561043
The Darwin builders are all failing here but strerror doesn't provide context.
R=golang-dev, bradfitz, adg
CC=golang-dev
https://golang.org/cl/13095043
The limit is 500. There is no way to change it.
This primarily affects name resolution.
If a million goroutines try to resolve DNS names,
only 500 will get to execute cgo calls at a time.
But in return the operating system will not crash.
Fixes#5625.
R=golang-dev, dan.kortschak, r, dvyukov
CC=bradfitz, golang-dev
https://golang.org/cl/13038043
Actually working to stay within the limit could cause subtle deadlocks.
Crashing avoids the subtlety.
Fixes#4056.
R=golang-dev, r, dvyukov
CC=golang-dev
https://golang.org/cl/13037043
When the new call site-specific frame bitmaps are available,
we can cut the zeroing to just those values that need it due
to scope escaping.
R=cshapiro, cshapiro
CC=golang-dev
https://golang.org/cl/13045043
Fixes#6107.
race: output goroutine 1 as main goroutine
Fixes#6130.
race: option to abort program on first detected error
R=golang-dev, mikioh.mikioh
CC=golang-dev
https://golang.org/cl/12968044
When the packages the tested package depends on don't build,
we weren't getting out early. Added a simple check for a successful
build to an existing early out.
There may be other ways that double compilation arises, but
this fixes the one listed in the issue.
Fixes#5679
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/13036043
The goal is to stop only those programs that would keep
going and run the machine out of memory, but before they do that.
1 GB on 64-bit, 250 MB on 32-bit.
That seems implausibly large, and it can be adjusted.
Fixes#2556.
Fixes#4494.
Fixes#5173.
R=khr, r, dvyukov
CC=golang-dev
https://golang.org/cl/12541052
Rows.Close.
Previously, callers that followed the example code (but not call
rows.Close after "for rows.Next() { ... }") could leak statements if
the driver returned an error other than io.EOF.
R=bradfitz, alex.brainman
CC=golang-dev, rsc
https://golang.org/cl/12677050
