Per golang-nuts question. Writing to p breaks
other writers (e.g. io.MultiWriter).
Make this explicit.
LGTM=gri, r, rsc
R=r, rsc, gri, joshlf13
CC=golang-codereviews
https://golang.org/cl/87780046
My cmd/go got in a weird state where it started invoking pack grcP.
Change pack to print a 1-line explanation of the usage problem
before the generic usage message.
LGTM=r
R=r
CC=golang-codereviews
https://golang.org/cl/87770047
Also make it clear this is not a complete description of all features.
Fixes#7790.
LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/88300044
OpenBSD is excluded from all the usual thread-local storage
code, not just emitting the tbss section in the external link .o
but emitting a PT_TLS section in an internally-linked executable.
I assume it just has no proper TLS support. Exclude it here too.
TBR=iant
CC=golang-codereviews
https://golang.org/cl/87900045
We get
/usr/lib/libc.a(stack_protector.o): In function `__stack_chk_fail_local':
stack_protector.c:(.text+0x158): multiple definition of `__stack_chk_fail_local'
/var/tmp/go-link-04838a/000001.o:/tmp/gobuilder/netbsd-386-minux-c7a9e9243878/go/src/pkg/runtime/cgo/gcc_386.S:41: first defined here
I am assuming this has never worked and possibly is not intended to work.
(Some systems are vehemently against static linking.)
TBR=iant
CC=golang-codereviews
https://golang.org/cl/88130046
When I did the original 386 ports on Linux and OS X, I chose to
define GS-relative expressions like 4(GS) as relative to the actual
thread-local storage base, which was usually GS but might not be
(it might be FS, or it might be a different constant offset from GS or FS).
The original scope was limited but since then the rewrites have
gotten out of control. Sometimes GS is rewritten, sometimes FS.
Some ports do other rewrites to enable shared libraries and
other linking. At no point in the code is it clear whether you are
looking at the real GS/FS or some synthesized thing that will be
rewritten. The code manipulating all these is duplicated in many
places.
The first step to fixing issue 7719 is to make the code intelligible
again.
This CL adds an explicit TLS pseudo-register to the 386 and amd64.
As a register, TLS refers to the thread-local storage base, and it
can only be loaded into another register:
MOVQ TLS, AX
An offset from the thread-local storage base is written off(reg)(TLS*1).
Semantically it is off(reg), but the (TLS*1) annotation marks this as
indexing from the loaded TLS base. This emits a relocation so that
if the linker needs to adjust the offset, it can. For example:
MOVQ TLS, AX
MOVQ 8(AX)(TLS*1), CX // load m into CX
On systems that support direct access to the TLS memory, this
pair of instructions can be reduced to a direct TLS memory reference:
MOVQ 8(TLS), CX // load m into CX
The 2-instruction and 1-instruction forms correspond roughly to
ELF TLS initial exec mode and ELF TLS local exec mode, respectively.
Liblink applies this rewrite on systems that support the 1-instruction form.
The decision is made using only the operating system (and probably
the -shared flag, eventually), not the link mode. If some link modes
on a particular operating system require the 2-instruction form,
then all builds for that operating system will use the 2-instruction
form, so that the link mode decision can be delayed to link time.
Obviously it is late to be making changes like this, but I despair
of correcting issue 7719 and issue 7164 without it. To make sure
I am not changing existing behavior, I built a "hello world" program
for every GOOS/GOARCH combination we have and then worked
to make sure that the rewrite generates exactly the same binaries,
byte for byte. There are a handful of TODOs in the code marking
kludges to get the byte-for-byte property, but at least now I can
explain exactly how each binary is handled.
The targets I tested this way are:
darwin-386
darwin-amd64
dragonfly-386
dragonfly-amd64
freebsd-386
freebsd-amd64
freebsd-arm
linux-386
linux-amd64
linux-arm
nacl-386
nacl-amd64p32
netbsd-386
netbsd-amd64
openbsd-386
openbsd-amd64
plan9-386
plan9-amd64
solaris-amd64
windows-386
windows-amd64
There were four exceptions to the byte-for-byte goal:
windows-386 and windows-amd64 have a time stamp
at bytes 137 and 138 of the header.
darwin-386 and plan9-386 have five or six modified
bytes in the middle of the Go symbol table, caused by
editing comments in runtime/sys_{darwin,plan9}_386.s.
Fixes#7164.
LGTM=iant
R=iant, aram, minux.ma, dave
CC=golang-codereviews
https://golang.org/cl/87920043
It was said already but apparently not enough times.
Fixes#6985.
LGTM=crawshaw
R=golang-codereviews, crawshaw
CC=golang-codereviews
https://golang.org/cl/86300043
Do not consider idle finalizer/bgsweep/timer goroutines as doing something useful.
We can't simply set isbackground for the whole lifetime of the goroutines,
because when finalizer goroutine calls user function, we do want to consider it
as doing something useful.
This is borken due to timers for quite some time.
With background sweep is become even more broken.
Fixes#7784.
LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/87960044
This breaks "go get -d repo/path/...".
««« original CL description
cmd/go: do not miss an error if import path contains "cmd/something"
Fixes#7638
LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/87300043
»»»
LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/87890043
Windows is building a chain to the AddTrust root which is different
from the native Go code and causing a build failure.
This change alters the test so that both should build to the AddTrust
root.
R=bradfitz
LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/87570044
The relocation and automatic variable types were using
arch-specific numbers. Introduce portable enumerations
instead.
To the best of my knowledge, these are the only arch-specific
bits left in the new object file format.
Remove now, before Go 1.3, because file formats are forever.
LGTM=iant
R=iant
CC=golang-codereviews
https://golang.org/cl/87670044
Comodo are now using a SHA-384 signed intermediate. The crypto/x509
package seeks to import hash functions needed for typical operation
without needing to import every hash function possible. Since a SHA-384
certificate is being used by Comodo, crypto/sha512 now appears to fall
into the scope of "typical operation".
R=bradfitz
LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/87670045
Update #7264
Races:
http://build.golang.org/log/a2e401fdcd4903a61a3375bff5da702a20ddafadhttp://build.golang.org/log/ec4c69e92076a747ac6d5df7eb7b382b31ab3d43
I think this is the first time I've actually seen a manifestation
of Issue 7264, and one that I can reproduce.
I don't know why it triggers on this test and not any others
just like it, or why I can't reproduce Issue 7264
independently, even when Dmitry gives me minimal repros.
Work around it for now with some synchronization to make the
race detector happy.
The proper fix will probably be in net/http/httptest itself, not
in all hundred some tests.
LGTM=rsc
R=rsc
CC=dvyukov, golang-codereviews
https://golang.org/cl/87640043
There are changes we know we want to make, but not before Go 1.3
Add a version number so that we can make them more easily later.
LGTM=iant
R=iant
CC=golang-codereviews
https://golang.org/cl/87670043
Currently Pool can cache up to 15 elements per P, and these elements are not accesible to other Ps.
If a Pool caches large objects, say 2MB, and GOMAXPROCS is set to a large value, say 32,
then the Pool can waste up to 960MB.
The new caching policy caches at most 1 per-P element, the rest is shared between Ps.
Get/Put performance is unchanged. Nested Get/Put performance is 57% worse.
However, overall scalability of nested Get/Put is significantly improved,
so the new policy starts winning under contention.
benchmark old ns/op new ns/op delta
BenchmarkPool 27.4 26.7 -2.55%
BenchmarkPool-4 6.63 6.59 -0.60%
BenchmarkPool-16 1.98 1.87 -5.56%
BenchmarkPool-64 1.93 1.86 -3.63%
BenchmarkPoolOverlflow 3970 6235 +57.05%
BenchmarkPoolOverlflow-4 10935 1668 -84.75%
BenchmarkPoolOverlflow-16 13419 520 -96.12%
BenchmarkPoolOverlflow-64 10295 380 -96.31%
LGTM=rsc
R=rsc
CC=golang-codereviews, khr
https://golang.org/cl/86020043
These are not ready and will not be in Go 1.3.
Fixes#6932.
LGTM=bradfitz
R=golang-codereviews, bradfitz, minux.ma
CC=golang-codereviews, iant, r
https://golang.org/cl/87630043
We have never released cmd/prof and don't plan to.
Now that nm, addr2line, and objdump have been rewritten in Go,
cmd/prof is the only thing keeping us from deleting libmach.
Delete cmd/prof, and then since nothing is using libmach, delete libmach.
13,000 lines of C deleted.
LGTM=minux.ma
R=golang-codereviews, minux.ma
CC=golang-codereviews, iant, r
https://golang.org/cl/87020044
Update cmd/dist not to build the C version.
Update cmd/go to install the Go version to the tool directory.
Update #7452
This is the basic logic needed for objdump, and it works well enough
to support the pprof list and weblist commands. A real disassembler
needs to be added in order to support the pprof disasm command
and the per-line assembly displays in weblist. That's still to come.
Probably objdump will move to go.tools when the disassembler
is added, but it can stay here for now.
LGTM=minux.ma
R=golang-codereviews, minux.ma
CC=golang-codereviews, iant, r
https://golang.org/cl/87580043
It looks like maybe on slower builders 4 seconds is not enough.
Trying to get rid of the flaky failures.
TBR=iant
CC=golang-codereviews
https://golang.org/cl/86870044
What was happening on Issue 7010 was handler intentionally took 30
milliseconds and the proxy's client timeout was 35 milliseconds. Then it
slammed the proxy with a bunch of requests.
Sometimes the server would be too slow to respond in its 5 millisecond
window and the client code would cancel the request, force-closing the
persistConn. If this came at the right time, the server's reply was
already in flight, and one of the goroutines would report:
Unsolicited response received on idle HTTP channel starting with "H"; err=<nil>
... rightfully scaring the user.
But the error was already handled and returned to the user, and this
connection knows it's been shut down. So look at the closed flag after
acquiring the same mutex guarding another field we were checking, and
don't complain if it's a known shutdown.
Also move closed down below the mutex which guards it.
Fixes#7010
LGTM=dsymonds
R=golang-codereviews, dsymonds
CC=adg, golang-codereviews, rsc
https://golang.org/cl/86740044
The test fails now with -race, so it's disabled.
The intention is that the fix for issue 7264
will also modify this test the same way and enable it.
Reporduce with 'go test -race -issue7264 -cpu=4'.
Update #7264
LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/86770043
Add test for multipart form requests with an invalid content-type to ensure
ErrNotMultipart is returned.
Change ParseMultipartForm to return ErrNotMultipart when it is returned by multipartReader.
Modify test for empty multipart request handling to use POST so that the body is checked.
Fixes#6334.
This is the first changeset working on multipart request handling. Further changesets
could add more tests and clean up the TODO.
LGTM=bradfitz
R=golang-codereviews, gobot, bradfitz, rsc
CC=golang-codereviews
https://golang.org/cl/44040043
I was implementing rules from RFC 2616. The rules are apparently useless,
ambiguous, and too strict for common software on the Internet. (e.g. curl)
Add more tests, including a test of a chunked request.
Fixes#7625
LGTM=dsymonds
R=golang-codereviews, dsymonds
CC=adg, golang-codereviews, rsc
https://golang.org/cl/84480045
Also: Simplify ReadSlice implementation and
ensure that it doesn't call fill() with a full
buffer (this caused a failure in net/textproto
TestLargeReadMIMEHeader because fill() wasn't able
to read more data).
Fixes#7745.
LGTM=bradfitz
R=r, bradfitz
CC=golang-codereviews
https://golang.org/cl/86590043
