1
0
mirror of https://github.com/golang/go synced 2024-11-27 00:41:31 -07:00
Commit Graph

23272 Commits

Author SHA1 Message Date
Ian Lance Taylor
e2b6cebcd6 misc/cgo/test/issue9400: fix to build with gccgo
This doesn't test much with gccgo, but at least it builds now, and the
test does, unsurprisingly, pass.  A proper test would require adding
assembly files in GCC syntax for all platforms that gccgo supports,
which would be infeasible.

Also added copyright headers to the asm files.

Change-Id: Icea5af29d7d521a0681506ddb617a79705b76d33
Reviewed-on: https://go-review.googlesource.com/9417
Reviewed-by: Minux Ma <minux@golang.org>
2015-04-29 16:57:13 +00:00
Joel Sing
282db6273e cmd/objdump: disable external linking test on openbsd/arm
Disable disassembly with external linking test on openbsd/arm, since this
platform does not currently support cgo/external linking.

Change-Id: I6eab6fcaac21407ce05075a4a1407fbfe0e6142b
Reviewed-on: https://go-review.googlesource.com/9481
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2015-04-29 15:47:51 +00:00
Shenghou Ma
73e791a38a cmd/internal/obj: do not generate data for $f32. and $f64. symbols at assemble time
When reading the object files for linking, liblink takes care of
generate the data for them.

This is a port of https://golang.org/cl/3101 to Go.

Change-Id: Ie3e2d6515bd7d253a8c1e25c70ef8fed064436d8
Signed-off-by: Shenghou Ma <minux@golang.org>
Reviewed-on: https://go-review.googlesource.com/8383
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-29 04:48:55 +00:00
Keith Randall
c526f3ac10 runtime: tail call into memeq/cmp body implementations
There's no need to call/ret to the body implementation.
It can write the result to the right place.  Just jump to
it and have it return to our caller.

Old:
  call body implementation
  compute result
  put result in a register
  return
  write register to result location
  return

New:
  load address of result location into a register
  jump to body implementation
  compute result
  write result to passed-in address
  return

It's a bit tricky on 386 because there is no free register
with which to pass the result location.  Free up a register
by keeping around blen-alen instead of both alen and blen.

Change-Id: If2cf0682a5bf1cc592bdda7c126ed4eee8944fba
Reviewed-on: https://go-review.googlesource.com/9202
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
2015-04-29 04:46:25 +00:00
Shenghou Ma
7e49c8193c runtime: skip gdb goroutine backtrace test on non-x86
Gdb is not able to backtrace our non-standard stack frames on RISC
architectures without frame pointer.

Change-Id: Id62a566ce2d743602ded2da22ff77b9ae34bc5ae
Signed-off-by: Shenghou Ma <minux@golang.org>
Reviewed-on: https://go-review.googlesource.com/9456
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2015-04-29 04:44:38 +00:00
Nigel Tao
6abfdc3fdd image/gif: check that individual frame's bounds are within the overall
GIF's bounds.

Also change the implicit Config Width and Height to be the
Rectangle.Max, not the Dx and Dy, of the first frame's bounds. For the
case where the first frame's bounds is something like (5,5)-(8,8), the
overall width should be 8, not 3.

Change-Id: I3affc484f5e32941a36f15517a92ca8d189d9c22
Reviewed-on: https://go-review.googlesource.com/9465
Reviewed-by: Rob Pike <r@golang.org>
2015-04-29 04:42:01 +00:00
Mikio Hara
a0cff2989a net: remove dead code in Write
Also, please be informed that the Write method on both connected and
unconnected-mode sockets may return a positive number of bytes written
with timeout or use of closed network connection error.

Change-Id: I2e2e6192e29cef4e9389eb0422c605c6d12e6a3c
Reviewed-on: https://go-review.googlesource.com/9466
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2015-04-29 04:40:59 +00:00
Michael Hudson-Doyle
4b23b50fb4 cmd/internal/obj: Delete Link.Symmorestack
This started out as trying to remove Bool2int calls, which it does a bit, but
mostly it ended up being removing the Link.Symmorestack array which seemed a
pointless bit of caching.

Change-Id: I91a51eb08cb4b08f3f9f093b575306499267b67a
Reviewed-on: https://go-review.googlesource.com/9239
Reviewed-by: Minux Ma <minux@golang.org>
Run-TryBot: Minux Ma <minux@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2015-04-29 03:32:28 +00:00
Shenghou Ma
da11a9dda3 cmd/internal/ld, runtime: unify stack reservation in PE header and runtime
With 128KB stack reservation, on 32-bit Windows, the maximum number
threads is ~9000.

The original 65535-byte stack commit is causing problem on Windows
XP where it makes the stack reservation to be 1MB despite the fact
that the runtime specified 128KB.

While we're at here, also fix the extra spacings in the unable to
create more OS thread error message: println will insert a space
between each argument.

See #9457 for more information.

Change-Id: I3a82f7d9717d3d55211b6eb1c34b00b0eaad83ed
Reviewed-on: https://go-review.googlesource.com/2237
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
Run-TryBot: Minux Ma <minux@golang.org>
2015-04-29 03:27:10 +00:00
Mikio Hara
edac5d9144 net: rename dialgoogle_test.go to external_test.go
In the followup changes, tests that require external facilities such as
DNS servers and RRs will move into external_test.go.

Change-Id: Ib460b0c51961159830357652dbf5430e1ba01514
Reviewed-on: https://go-review.googlesource.com/9461
Reviewed-by: Dave Cheney <dave@cheney.net>
2015-04-29 02:24:27 +00:00
Shenghou Ma
2b7505e28a cmd/internal/gc: fix write barrier fast path on RISC architectures
They have to read the boolean into a register first and then do
the comparison.

Fixes #10598.

Change-Id: I2b808837a8c6393e1e0778296b6592aaab2b04bf
Signed-off-by: Shenghou Ma <minux@golang.org>
Reviewed-on: https://go-review.googlesource.com/9453
Reviewed-by: Dave Cheney <dave@cheney.net>
2015-04-29 00:29:44 +00:00
Shenghou Ma
e7dd28891e cmd/internal/gc, cmd/[56789]g: rename stackcopy to blockcopy
To avoid confusion with the runtime concept of copying stack.

Change-Id: I33442377b71012c2482c2d0ddd561492c71e70d0
Reviewed-on: https://go-review.googlesource.com/8639
Reviewed-by: Dave Cheney <dave@cheney.net>
Reviewed-by: Russ Cox <rsc@golang.org>
2015-04-29 00:28:01 +00:00
Nigel Tao
baf3814b29 image/gif: encode disposal, bg index and Config.
The previous CL implemented decoding, but not encoding.

Also return the global color map (if present) for DecodeConfig.

Change-Id: I3b99c93720246010c9fe0924dc40a67875dfc852
Reviewed-on: https://go-review.googlesource.com/9389
Reviewed-by: Rob Pike <r@golang.org>
2015-04-28 23:01:37 +00:00
Ian Lance Taylor
0c62c93a09 runtime/cgo: use PTHREAD_{MUTEX,COND}_INITIALIZER
Technically you must initialize static pthread_mutex_t and
pthread_cond_t variables with the appropriate INITIALIZER macro.  In
practice the default initializers are zero anyhow, but it's still good
code hygiene.

Change-Id: I517304b16c2c7943b3880855c1b47a9a506b4bdf
Reviewed-on: https://go-review.googlesource.com/9433
Reviewed-by: David Crawshaw <crawshaw@golang.org>
2015-04-28 22:27:26 +00:00
Brad Fitzpatrick
339cf9807d net/http: documentation updates
Fixes #10366 (how to set custom headers)
Fixes #9836 (PATCH in PostForm)
Fixes #9276 (generating a server-side Request for testing)
Update #8991 (clarify Response.Write for now; export ReverseProxy's copy later?)

Change-Id: I95a11bf3bb3eeeeb72775b6ebfbc761641addc35
Reviewed-on: https://go-review.googlesource.com/9410
Reviewed-by: David Crawshaw <crawshaw@golang.org>
2015-04-28 21:58:58 +00:00
Rob Pike
ac354ba725 doc/go1.5.txt: snow leopard not maintained
Change-Id: If50fd2dd4005d0ce39081c6b8302707403c139f9
Reviewed-on: https://go-review.googlesource.com/9432
Reviewed-by: Rob Pike <r@golang.org>
2015-04-28 20:57:27 +00:00
Brad Fitzpatrick
5ed44e9d4d net/http: test and document suppressing implicit Content-Type response header
No code changes.

Fixes #8992

Change-Id: I10c8340a4f8e3e7add9b3ac5aa0a1e8d8aa49f40
Reviewed-on: https://go-review.googlesource.com/9412
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
2015-04-28 20:49:08 +00:00
Rob Pike
d3bd6b6ae7 cmd/doc: print documentation for all matches in a package, not just the first
Change-Id: Id0d4ac7169f741dfeec7b1e67bdc21e49ae37b9e
Reviewed-on: https://go-review.googlesource.com/9430
Reviewed-by: Russ Cox <rsc@golang.org>
2015-04-28 19:42:57 +00:00
Rob Pike
a88994c137 cmd/asm: add comments back for aliases on jumps for x86
These were lost in the transition from 8a/6a to asm.
Also, in the process, discover more aliases. I'm betting the missing
ones were a casualty of the recent merge of 386 and amd64.

Update #10385.

Change-Id: I1681034b25af3ffc103f75e5fc57baca5feb3fcd
Reviewed-on: https://go-review.googlesource.com/9431
Reviewed-by: Russ Cox <rsc@golang.org>
2015-04-28 19:41:19 +00:00
Adam Langley
d2d840aae6 doc: mention several recent crypto changes in go1.5.txt
Change-Id: Icf212fc7ea108ff22bb7fa9da137410d729d2569
Reviewed-on: https://go-review.googlesource.com/9413
Reviewed-by: Adam Langley <agl@golang.org>
2015-04-28 18:45:24 +00:00
Richard Barnes
0bb96beace encoding/asn1: Improved control of flags and times
This change corrects the serialization of asn1.Flag values, so that
when set, they serialize to an empty value, and when unset, they are
omitted. It also adds a format parameter that allows calling code
to control whether time.Time values are serialized as UTCTime or
GeneralizedTime.

Change-Id: I6d97abf009ea317338dab30c80f35a2de7e07104
Reviewed-on: https://go-review.googlesource.com/5970
Reviewed-by: Adam Langley <agl@golang.org>
Run-TryBot: Adam Langley <agl@golang.org>
2015-04-28 16:35:13 +00:00
Adam Langley
d942737f8a crypto/x509: allow parsing of certificates with unknown critical extensions.
Previously, unknown critical extensions were a parse error. However, for
some cases one wishes to parse and use a certificate that may contain
these extensions. For example, when using a certificate in a TLS server:
it's the client's concern whether it understands the critical extensions
but the server still wishes to parse SNI values out of the certificate
etc.

This change moves the rejection of unknown critical extensions from
ParseCertificate to Certificate.Verify. The former will now record the
OIDs of unknown critical extensions in the Certificate and the latter
will fail to verify certificates with them. If a user of this package
wishes to handle any unknown critical extensions themselves, they can
extract the extensions from Certificate.Extensions, process them and
remove known OIDs from Certificate.UnknownCriticalExtensions.

See discussion at
https://groups.google.com/forum/#!msg/golang-nuts/IrzoZlwalTQ/qdK1k-ogeHIJ
and in the linked bug.

Fixes #10459

Change-Id: I762521a44c01160fa0901f990ba2f5d4977d7977
Reviewed-on: https://go-review.googlesource.com/9390
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2015-04-28 16:32:09 +00:00
Austin Clements
63caec5dee runtime: eliminate one heapBitsForObject from scanobject
scanobject with ptrmask!=nil is only ever called with the base
pointer of a heap object. Currently, scanobject calls
heapBitsForObject, which goes to a great deal of trouble to check
that the pointer points into the heap and to find the base of the
object it points to, both of which are completely unnecessary in
this case.

Replace this call to heapBitsForObject with much simpler logic to
fetch the span and compute the heap bits.

Benchmark results with five runs:

name                                    old mean                new mean        delta
BenchmarkBinaryTree17              9.21s × (0.95,1.02)     8.55s × (0.91,1.03)  -7.16% (p=0.022)
BenchmarkFannkuch11                2.65s × (1.00,1.00)     2.62s × (1.00,1.00)  -1.10% (p=0.000)
BenchmarkFmtFprintfEmpty          73.2ns × (0.99,1.01)    71.7ns × (1.00,1.01)  -1.99% (p=0.004)
BenchmarkFmtFprintfString          302ns × (0.99,1.00)     292ns × (0.98,1.02)  -3.31% (p=0.020)
BenchmarkFmtFprintfInt             281ns × (0.98,1.01)     279ns × (0.96,1.02)  ~ (p=0.596)
BenchmarkFmtFprintfIntInt          482ns × (0.98,1.01)     488ns × (0.95,1.02)  ~ (p=0.419)
BenchmarkFmtFprintfPrefixedInt     382ns × (0.99,1.01)     365ns × (0.96,1.02)  -4.35% (p=0.015)
BenchmarkFmtFprintfFloat           475ns × (0.99,1.01)     472ns × (1.00,1.00)  ~ (p=0.108)
BenchmarkFmtManyArgs              1.89µs × (1.00,1.01)    1.90µs × (0.94,1.02)  ~ (p=0.883)
BenchmarkGobDecode                22.4ms × (0.99,1.01)    21.9ms × (0.92,1.04)  ~ (p=0.332)
BenchmarkGobEncode                24.7ms × (0.98,1.02)    23.9ms × (0.87,1.07)  ~ (p=0.407)
BenchmarkGzip                      397ms × (0.99,1.01)     398ms × (0.99,1.01)  ~ (p=0.718)
BenchmarkGunzip                   96.7ms × (1.00,1.00)    96.9ms × (1.00,1.00)  ~ (p=0.230)
BenchmarkHTTPClientServer         71.5µs × (0.98,1.01)    68.5µs × (0.92,1.06)  ~ (p=0.243)
BenchmarkJSONEncode               46.1ms × (0.98,1.01)    44.9ms × (0.98,1.03)  -2.51% (p=0.040)
BenchmarkJSONDecode               86.1ms × (0.99,1.01)    86.5ms × (0.99,1.01)  ~ (p=0.343)
BenchmarkMandelbrot200            4.12ms × (1.00,1.00)    4.13ms × (1.00,1.00)  +0.23% (p=0.000)
BenchmarkGoParse                  5.89ms × (0.96,1.03)    5.82ms × (0.96,1.04)  ~ (p=0.522)
BenchmarkRegexpMatchEasy0_32       141ns × (0.99,1.01)     142ns × (1.00,1.00)  ~ (p=0.178)
BenchmarkRegexpMatchEasy0_1K       408ns × (1.00,1.00)     392ns × (0.99,1.00)  -3.83% (p=0.000)
BenchmarkRegexpMatchEasy1_32       122ns × (1.00,1.00)     122ns × (1.00,1.00)  ~ (p=0.178)
BenchmarkRegexpMatchEasy1_1K       626ns × (1.00,1.01)     624ns × (0.99,1.00)  ~ (p=0.122)
BenchmarkRegexpMatchMedium_32      202ns × (0.99,1.00)     205ns × (0.99,1.01)  +1.58% (p=0.001)
BenchmarkRegexpMatchMedium_1K     54.4µs × (1.00,1.00)    55.5µs × (1.00,1.00)  +1.86% (p=0.000)
BenchmarkRegexpMatchHard_32       2.68µs × (1.00,1.00)    2.71µs × (1.00,1.00)  +0.97% (p=0.002)
BenchmarkRegexpMatchHard_1K       79.8µs × (1.00,1.01)    80.5µs × (1.00,1.01)  +0.94% (p=0.003)
BenchmarkRevcomp                   590ms × (0.99,1.01)     585ms × (1.00,1.00)  ~ (p=0.066)
BenchmarkTemplate                  111ms × (0.97,1.02)     112ms × (0.99,1.01)  ~ (p=0.201)
BenchmarkTimeParse                 392ns × (1.00,1.00)     385ns × (1.00,1.00)  -1.69% (p=0.000)
BenchmarkTimeFormat                449ns × (0.98,1.01)     448ns × (0.99,1.01)  ~ (p=0.550)

Change-Id: Ie7c3830c481d96c9043e7bf26853c6c1d05dc9f4
Reviewed-on: https://go-review.googlesource.com/9364
Reviewed-by: Rick Hudson <rlh@golang.org>
2015-04-28 15:22:20 +00:00
David Crawshaw
05d53165ce cmd/internal/ld: remove Biobuf unget
The underlying *bufio.Reader does everything that's needed here.

Change-Id: If0712a5b4d3142ae4bceaa2efe287eaf2b91e54e
Reviewed-on: https://go-review.googlesource.com/9365
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-28 11:01:42 +00:00
Russ Cox
cbbe9f63dc doc/go1.5.txt: mention goroutine scheduling change
Change-Id: I43a40f0c10472b3126c06b0d4268b32b54665f12
Reviewed-on: https://go-review.googlesource.com/9349
Reviewed-by: Rob Pike <r@golang.org>
2015-04-28 04:37:17 +00:00
Josh Bleecher Snyder
45ccea71a1 Revert "Revert "cmd/dist: consolidate runtime CPU tests""
This reverts commit 81c2233b4a.

Change-Id: Ie7024f04dba6352ae79ba68d4da5c0c25844cd8c
Reviewed-on: https://go-review.googlesource.com/9397
Reviewed-by: Dave Cheney <dave@cheney.net>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2015-04-28 02:44:27 +00:00
Russ Cox
2a73559023 cmd/internal/gc: emit typedmemmove write barrier from sgen
Emitting it here instead of rewriting the tree earlier sets us up
to generate an inline check, like we do for single pointers.
But even without the inline check, generating at this level lets
us generate significantly more efficient code, probably due to
having fewer temporaries and less complex high-level code
for the compiler to churn through.

Revcomp is worse, almost certainly due to register pressure.

name                                       old                     new          delta
BenchmarkBinaryTree17              18.0s × (0.99,1.01)     18.0s × (0.99,1.01)  ~
BenchmarkFannkuch11                4.43s × (1.00,1.00)     4.36s × (1.00,1.00)  -1.44%
BenchmarkFmtFprintfEmpty           114ns × (0.95,1.05)      86ns × (0.97,1.06)  -24.12%
BenchmarkFmtFprintfString          468ns × (0.99,1.01)     420ns × (0.99,1.02)  -10.16%
BenchmarkFmtFprintfInt             433ns × (1.00,1.01)     386ns × (0.99,1.02)  -10.74%
BenchmarkFmtFprintfIntInt          748ns × (0.99,1.01)     647ns × (0.99,1.01)  -13.56%
BenchmarkFmtFprintfPrefixedInt     547ns × (0.99,1.01)     499ns × (0.99,1.02)  -8.78%
BenchmarkFmtFprintfFloat           756ns × (1.00,1.01)     689ns × (1.00,1.00)  -8.86%
BenchmarkFmtManyArgs              2.79µs × (1.00,1.01)    2.53µs × (1.00,1.00)  -9.30%
BenchmarkGobDecode                39.6ms × (0.99,1.00)    39.2ms × (0.98,1.01)  -1.07%
BenchmarkGobEncode                37.6ms × (1.00,1.01)    37.5ms × (0.99,1.01)  ~
BenchmarkGzip                      663ms × (0.99,1.02)     660ms × (0.98,1.01)  ~
BenchmarkGunzip                    142ms × (1.00,1.00)     143ms × (1.00,1.00)  ~
BenchmarkHTTPClientServer          132µs × (0.99,1.01)     133µs × (0.99,1.02)  ~
BenchmarkJSONEncode               56.2ms × (0.99,1.01)    54.0ms × (0.98,1.01)  -3.97%
BenchmarkJSONDecode                138ms × (1.00,1.00)     134ms × (0.99,1.02)  -2.70%
BenchmarkMandelbrot200            6.03ms × (1.00,1.01)    6.00ms × (1.00,1.01)  ~
BenchmarkGoParse                  9.82ms × (0.93,1.10)   10.35ms × (0.88,1.11)  ~
BenchmarkRegexpMatchEasy0_32       207ns × (1.00,1.00)     163ns × (0.99,1.01)  -21.26%
BenchmarkRegexpMatchEasy0_1K       581ns × (1.00,1.01)     566ns × (0.99,1.00)  -2.50%
BenchmarkRegexpMatchEasy1_32       185ns × (0.99,1.01)     138ns × (1.00,1.01)  -25.41%
BenchmarkRegexpMatchEasy1_1K       975ns × (1.00,1.01)     892ns × (1.00,1.00)  -8.51%
BenchmarkRegexpMatchMedium_32      328ns × (0.99,1.00)     252ns × (1.00,1.00)  -23.17%
BenchmarkRegexpMatchMedium_1K     88.6µs × (1.00,1.01)    73.0µs × (1.00,1.01)  -17.66%
BenchmarkRegexpMatchHard_32       4.69µs × (0.95,1.03)    3.85µs × (1.00,1.01)  -17.91%
BenchmarkRegexpMatchHard_1K        133µs × (1.00,1.01)     117µs × (1.00,1.00)  -12.34%
BenchmarkRevcomp                   902ms × (0.99,1.05)    1001ms × (0.94,1.01)  +11.04%
BenchmarkTemplate                  174ms × (0.99,1.01)     160ms × (0.99,1.01)  -7.70%
BenchmarkTimeParse                 639ns × (1.00,1.00)     622ns × (1.00,1.00)  -2.66%
BenchmarkTimeFormat                736ns × (1.00,1.01)     736ns × (1.00,1.02)  ~

Change-Id: Ib3bbeb379f5f4819e6f5dcf69bc88a2b7ed41460
Reviewed-on: https://go-review.googlesource.com/9225
Reviewed-by: Austin Clements <austin@google.com>
Run-TryBot: Russ Cox <rsc@golang.org>
2015-04-28 01:38:18 +00:00
Russ Cox
653d56075d cmd/internal/gc: inline writeBarrierEnabled check before calling writebarrierptr
I believe the benchmarks that get slower are under register pressure,
and not making the call unconditionally makes the pressure worse,
and the register allocator doesn't do a great job. But part of the point
of this sequence is to get the write barriers out of the way so I can work
on the register allocator, so that's okay.

name                                       old                     new          delta
BenchmarkBinaryTree17              17.9s × (1.00,1.01)     18.0s × (0.99,1.01)  ~
BenchmarkFannkuch11                4.43s × (1.00,1.00)     4.43s × (1.00,1.00)  ~
BenchmarkFmtFprintfEmpty           110ns × (1.00,1.06)     114ns × (0.95,1.05)  ~
BenchmarkFmtFprintfString          487ns × (0.99,1.00)     468ns × (0.99,1.01)  -4.00%
BenchmarkFmtFprintfInt             450ns × (0.99,1.00)     433ns × (1.00,1.01)  -3.88%
BenchmarkFmtFprintfIntInt          762ns × (1.00,1.00)     748ns × (0.99,1.01)  -1.84%
BenchmarkFmtFprintfPrefixedInt     584ns × (0.99,1.01)     547ns × (0.99,1.01)  -6.26%
BenchmarkFmtFprintfFloat           738ns × (1.00,1.00)     756ns × (1.00,1.01)  +2.37%
BenchmarkFmtManyArgs              2.80µs × (1.00,1.01)    2.79µs × (1.00,1.01)  ~
BenchmarkGobDecode                39.0ms × (0.99,1.00)    39.6ms × (0.99,1.00)  +1.54%
BenchmarkGobEncode                37.8ms × (0.98,1.01)    37.6ms × (1.00,1.01)  ~
BenchmarkGzip                      661ms × (0.99,1.01)     663ms × (0.99,1.02)  ~
BenchmarkGunzip                    142ms × (1.00,1.00)     142ms × (1.00,1.00)  ~
BenchmarkHTTPClientServer          132µs × (0.99,1.01)     132µs × (0.99,1.01)  ~
BenchmarkJSONEncode               56.3ms × (0.99,1.01)    56.2ms × (0.99,1.01)  ~
BenchmarkJSONDecode                138ms × (0.99,1.01)     138ms × (1.00,1.00)  ~
BenchmarkMandelbrot200            6.01ms × (1.00,1.00)    6.03ms × (1.00,1.01)  +0.23%
BenchmarkGoParse                  10.2ms × (0.87,1.05)     9.8ms × (0.93,1.10)  ~
BenchmarkRegexpMatchEasy0_32       208ns × (1.00,1.00)     207ns × (1.00,1.00)  ~
BenchmarkRegexpMatchEasy0_1K       588ns × (1.00,1.00)     581ns × (1.00,1.01)  -1.27%
BenchmarkRegexpMatchEasy1_32       182ns × (0.99,1.01)     185ns × (0.99,1.01)  +1.65%
BenchmarkRegexpMatchEasy1_1K       986ns × (1.00,1.01)     975ns × (1.00,1.01)  -1.17%
BenchmarkRegexpMatchMedium_32      323ns × (1.00,1.01)     328ns × (0.99,1.00)  +1.55%
BenchmarkRegexpMatchMedium_1K     89.9µs × (1.00,1.00)    88.6µs × (1.00,1.01)  -1.38%
BenchmarkRegexpMatchHard_32       4.72µs × (0.95,1.01)    4.69µs × (0.95,1.03)  ~
BenchmarkRegexpMatchHard_1K        133µs × (1.00,1.01)     133µs × (1.00,1.01)  ~
BenchmarkRevcomp                   900ms × (1.00,1.05)     902ms × (0.99,1.05)  ~
BenchmarkTemplate                  168ms × (0.99,1.01)     174ms × (0.99,1.01)  +3.30%
BenchmarkTimeParse                 637ns × (1.00,1.00)     639ns × (1.00,1.00)  +0.31%
BenchmarkTimeFormat                738ns × (1.00,1.00)     736ns × (1.00,1.01)  ~

Change-Id: I03ce152852edec404538f6c20eb650fac82e2aa2
Reviewed-on: https://go-review.googlesource.com/9224
Reviewed-by: Austin Clements <austin@google.com>
2015-04-28 01:38:06 +00:00
Russ Cox
32d6fbcb4f runtime: replace needwb() with writeBarrierEnabled
Reduce the write barrier check to a single load and compare
so that it can be inlined into write barrier use sites.
Makes the standard write barrier a little faster too.

name                                       old                     new          delta
BenchmarkBinaryTree17              17.9s × (0.99,1.01)     17.9s × (1.00,1.01)  ~
BenchmarkFannkuch11                4.35s × (1.00,1.00)     4.43s × (1.00,1.00)  +1.81%
BenchmarkFmtFprintfEmpty           120ns × (0.93,1.06)     110ns × (1.00,1.06)  -7.92%
BenchmarkFmtFprintfString          479ns × (0.99,1.00)     487ns × (0.99,1.00)  +1.67%
BenchmarkFmtFprintfInt             452ns × (0.99,1.02)     450ns × (0.99,1.00)  ~
BenchmarkFmtFprintfIntInt          766ns × (0.99,1.01)     762ns × (1.00,1.00)  ~
BenchmarkFmtFprintfPrefixedInt     576ns × (0.98,1.01)     584ns × (0.99,1.01)  ~
BenchmarkFmtFprintfFloat           730ns × (1.00,1.01)     738ns × (1.00,1.00)  +1.16%
BenchmarkFmtManyArgs              2.84µs × (0.99,1.00)    2.80µs × (1.00,1.01)  -1.22%
BenchmarkGobDecode                39.3ms × (0.98,1.01)    39.0ms × (0.99,1.00)  ~
BenchmarkGobEncode                39.5ms × (0.99,1.01)    37.8ms × (0.98,1.01)  -4.33%
BenchmarkGzip                      663ms × (1.00,1.01)     661ms × (0.99,1.01)  ~
BenchmarkGunzip                    143ms × (1.00,1.00)     142ms × (1.00,1.00)  ~
BenchmarkHTTPClientServer          132µs × (0.99,1.01)     132µs × (0.99,1.01)  ~
BenchmarkJSONEncode               57.4ms × (0.99,1.01)    56.3ms × (0.99,1.01)  -1.96%
BenchmarkJSONDecode                139ms × (0.99,1.00)     138ms × (0.99,1.01)  ~
BenchmarkMandelbrot200            6.03ms × (1.00,1.00)    6.01ms × (1.00,1.00)  ~
BenchmarkGoParse                  10.3ms × (0.89,1.14)    10.2ms × (0.87,1.05)  ~
BenchmarkRegexpMatchEasy0_32       209ns × (1.00,1.00)     208ns × (1.00,1.00)  ~
BenchmarkRegexpMatchEasy0_1K       591ns × (0.99,1.00)     588ns × (1.00,1.00)  ~
BenchmarkRegexpMatchEasy1_32       184ns × (0.99,1.02)     182ns × (0.99,1.01)  ~
BenchmarkRegexpMatchEasy1_1K      1.01µs × (1.00,1.00)    0.99µs × (1.00,1.01)  -2.33%
BenchmarkRegexpMatchMedium_32      330ns × (1.00,1.00)     323ns × (1.00,1.01)  -2.12%
BenchmarkRegexpMatchMedium_1K     92.6µs × (1.00,1.00)    89.9µs × (1.00,1.00)  -2.92%
BenchmarkRegexpMatchHard_32       4.80µs × (0.95,1.00)    4.72µs × (0.95,1.01)  ~
BenchmarkRegexpMatchHard_1K        136µs × (1.00,1.00)     133µs × (1.00,1.01)  -1.86%
BenchmarkRevcomp                   900ms × (0.99,1.04)     900ms × (1.00,1.05)  ~
BenchmarkTemplate                  172ms × (1.00,1.00)     168ms × (0.99,1.01)  -2.07%
BenchmarkTimeParse                 637ns × (1.00,1.00)     637ns × (1.00,1.00)  ~
BenchmarkTimeFormat                744ns × (1.00,1.01)     738ns × (1.00,1.00)  -0.67%

Change-Id: I4ecc925805da1f5ee264377f1f7574f54ee575e7
Reviewed-on: https://go-review.googlesource.com/9321
Reviewed-by: Austin Clements <austin@google.com>
2015-04-28 01:37:53 +00:00
Russ Cox
2050f57141 runtime: change unused argument in fat write barriers from pointer to scalar
The argument is unused, only present for alignment of the
following argument. The compiler today always passes a zero
but I'd rather not write anything there during the call sequence,
so mark it as a scalar so the garbage collector won't look at it.

As expected, no significant performance change.

name                                       old                     new          delta
BenchmarkBinaryTree17              17.9s × (0.99,1.00)     17.9s × (0.99,1.01)  ~
BenchmarkFannkuch11                4.35s × (1.00,1.00)     4.35s × (1.00,1.00)  ~
BenchmarkFmtFprintfEmpty           120ns × (0.94,1.05)     120ns × (0.93,1.06)  ~
BenchmarkFmtFprintfString          477ns × (1.00,1.00)     479ns × (0.99,1.00)  ~
BenchmarkFmtFprintfInt             450ns × (0.99,1.01)     452ns × (0.99,1.02)  ~
BenchmarkFmtFprintfIntInt          765ns × (0.99,1.01)     766ns × (0.99,1.01)  ~
BenchmarkFmtFprintfPrefixedInt     569ns × (0.99,1.01)     576ns × (0.98,1.01)  ~
BenchmarkFmtFprintfFloat           728ns × (1.00,1.00)     730ns × (1.00,1.01)  ~
BenchmarkFmtManyArgs              2.82µs × (0.99,1.01)    2.84µs × (0.99,1.00)  ~
BenchmarkGobDecode                39.1ms × (0.99,1.01)    39.3ms × (0.98,1.01)  ~
BenchmarkGobEncode                39.4ms × (0.99,1.01)    39.5ms × (0.99,1.01)  ~
BenchmarkGzip                      661ms × (0.99,1.01)     663ms × (1.00,1.01)  ~
BenchmarkGunzip                    143ms × (1.00,1.00)     143ms × (1.00,1.00)  ~
BenchmarkHTTPClientServer          133µs × (0.99,1.01)     132µs × (0.99,1.01)  ~
BenchmarkJSONEncode               57.3ms × (0.99,1.04)    57.4ms × (0.99,1.01)  ~
BenchmarkJSONDecode                139ms × (0.99,1.00)     139ms × (0.99,1.00)  ~
BenchmarkMandelbrot200            6.02ms × (1.00,1.00)    6.03ms × (1.00,1.00)  ~
BenchmarkGoParse                  9.72ms × (0.92,1.11)   10.31ms × (0.89,1.14)  ~
BenchmarkRegexpMatchEasy0_32       209ns × (1.00,1.01)     209ns × (1.00,1.00)  ~
BenchmarkRegexpMatchEasy0_1K       592ns × (0.99,1.00)     591ns × (0.99,1.00)  ~
BenchmarkRegexpMatchEasy1_32       183ns × (0.98,1.01)     184ns × (0.99,1.02)  ~
BenchmarkRegexpMatchEasy1_1K      1.01µs × (1.00,1.01)    1.01µs × (1.00,1.00)  ~
BenchmarkRegexpMatchMedium_32      330ns × (1.00,1.00)     330ns × (1.00,1.00)  ~
BenchmarkRegexpMatchMedium_1K     92.4µs × (1.00,1.00)    92.6µs × (1.00,1.00)  ~
BenchmarkRegexpMatchHard_32       4.77µs × (0.95,1.01)    4.80µs × (0.95,1.00)  ~
BenchmarkRegexpMatchHard_1K        136µs × (1.00,1.00)     136µs × (1.00,1.00)  ~
BenchmarkRevcomp                   906ms × (0.99,1.05)     900ms × (0.99,1.04)  ~
BenchmarkTemplate                  171ms × (0.99,1.01)     172ms × (1.00,1.00)  ~
BenchmarkTimeParse                 638ns × (1.00,1.00)     637ns × (1.00,1.00)  ~
BenchmarkTimeFormat                745ns × (0.99,1.02)     744ns × (1.00,1.01)  ~

Change-Id: I0aeac5dc7adfd75e2223e3aabfedc7818d339f9b
Reviewed-on: https://go-review.googlesource.com/9320
Reviewed-by: Austin Clements <austin@google.com>
2015-04-28 01:37:45 +00:00
Russ Cox
6c328efc4c cmd/internal/gc: accept comma-separated list of name=value for -d
This should obviously have no performance impact.
Listing numbers just as a sanity check for the benchmark
comparison program: it should (and does) find nothing
to report.

name                                       old                     new          delta
BenchmarkBinaryTree17              18.0s × (0.99,1.01)     17.9s × (0.99,1.00)  ~
BenchmarkFannkuch11                4.36s × (1.00,1.00)     4.35s × (1.00,1.00)  ~
BenchmarkFmtFprintfEmpty           120ns × (0.99,1.06)     120ns × (0.94,1.05)  ~
BenchmarkFmtFprintfString          480ns × (0.99,1.01)     477ns × (1.00,1.00)  ~
BenchmarkFmtFprintfInt             451ns × (0.99,1.01)     450ns × (0.99,1.01)  ~
BenchmarkFmtFprintfIntInt          766ns × (0.99,1.01)     765ns × (0.99,1.01)  ~
BenchmarkFmtFprintfPrefixedInt     569ns × (0.99,1.01)     569ns × (0.99,1.01)  ~
BenchmarkFmtFprintfFloat           728ns × (1.00,1.01)     728ns × (1.00,1.00)  ~
BenchmarkFmtManyArgs              2.81µs × (1.00,1.01)    2.82µs × (0.99,1.01)  ~
BenchmarkGobDecode                39.4ms × (0.99,1.01)    39.1ms × (0.99,1.01)  ~
BenchmarkGobEncode                39.4ms × (0.99,1.00)    39.4ms × (0.99,1.01)  ~
BenchmarkGzip                      660ms × (1.00,1.01)     661ms × (0.99,1.01)  ~
BenchmarkGunzip                    143ms × (1.00,1.00)     143ms × (1.00,1.00)  ~
BenchmarkHTTPClientServer          132µs × (0.99,1.01)     133µs × (0.99,1.01)  ~
BenchmarkJSONEncode               57.1ms × (0.99,1.01)    57.3ms × (0.99,1.04)  ~
BenchmarkJSONDecode                138ms × (1.00,1.01)     139ms × (0.99,1.00)  ~
BenchmarkMandelbrot200            6.02ms × (1.00,1.00)    6.02ms × (1.00,1.00)  ~
BenchmarkGoParse                  9.79ms × (0.92,1.07)    9.72ms × (0.92,1.11)  ~
BenchmarkRegexpMatchEasy0_32       210ns × (1.00,1.01)     209ns × (1.00,1.01)  ~
BenchmarkRegexpMatchEasy0_1K       593ns × (0.99,1.01)     592ns × (0.99,1.00)  ~
BenchmarkRegexpMatchEasy1_32       182ns × (0.99,1.01)     183ns × (0.98,1.01)  ~
BenchmarkRegexpMatchEasy1_1K      1.01µs × (1.00,1.01)    1.01µs × (1.00,1.01)  ~
BenchmarkRegexpMatchMedium_32      331ns × (1.00,1.00)     330ns × (1.00,1.00)  ~
BenchmarkRegexpMatchMedium_1K     92.6µs × (1.00,1.01)    92.4µs × (1.00,1.00)  ~
BenchmarkRegexpMatchHard_32       4.58µs × (0.99,1.05)    4.77µs × (0.95,1.01)  ~
BenchmarkRegexpMatchHard_1K        136µs × (1.00,1.01)     136µs × (1.00,1.00)  ~
BenchmarkRevcomp                   900ms × (0.99,1.06)     906ms × (0.99,1.05)  ~
BenchmarkTemplate                  171ms × (1.00,1.01)     171ms × (0.99,1.01)  ~
BenchmarkTimeParse                 637ns × (1.00,1.00)     638ns × (1.00,1.00)  ~
BenchmarkTimeFormat                742ns × (1.00,1.00)     745ns × (0.99,1.02)  ~

Change-Id: I59ec875715cb176bbffa709546370a6a7fc5a75d
Reviewed-on: https://go-review.googlesource.com/9309
Reviewed-by: Austin Clements <austin@google.com>
2015-04-28 01:37:34 +00:00
Russ Cox
0f0bc0f016 cmd/internal/gc: use MOV R0, R1 instead of LEA 0(R0), R1 in Agen
Minor code generation optimization I've been meaning to do
for a while and noticed while working on the emitted write
barrier code. Using MOV lets the compiler and maybe the
processor do copy propagation.

name                                       old                     new          delta
BenchmarkBinaryTree17              17.9s × (0.99,1.01)     18.0s × (0.99,1.01)  ~
BenchmarkFannkuch11                4.42s × (1.00,1.00)     4.36s × (1.00,1.00)  -1.39%
BenchmarkFmtFprintfEmpty           118ns × (0.96,1.02)     120ns × (0.99,1.06)  ~
BenchmarkFmtFprintfString          486ns × (0.99,1.01)     480ns × (0.99,1.01)  -1.34%
BenchmarkFmtFprintfInt             457ns × (0.99,1.01)     451ns × (0.99,1.01)  -1.31%
BenchmarkFmtFprintfIntInt          768ns × (1.00,1.01)     766ns × (0.99,1.01)  ~
BenchmarkFmtFprintfPrefixedInt     584ns × (0.99,1.03)     569ns × (0.99,1.01)  -2.57%
BenchmarkFmtFprintfFloat           739ns × (0.99,1.00)     728ns × (1.00,1.01)  -1.49%
BenchmarkFmtManyArgs              2.77µs × (1.00,1.00)    2.81µs × (1.00,1.01)  +1.53%
BenchmarkGobDecode                39.3ms × (0.99,1.01)    39.4ms × (0.99,1.01)  ~
BenchmarkGobEncode                39.4ms × (0.99,1.00)    39.4ms × (0.99,1.00)  ~
BenchmarkGzip                      661ms × (0.99,1.01)     660ms × (1.00,1.01)  ~
BenchmarkGunzip                    142ms × (1.00,1.00)     143ms × (1.00,1.00)  +0.20%
BenchmarkHTTPClientServer          133µs × (0.98,1.01)     132µs × (0.99,1.01)  ~
BenchmarkJSONEncode               56.5ms × (0.99,1.01)    57.1ms × (0.99,1.01)  +0.94%
BenchmarkJSONDecode                143ms × (1.00,1.00)     138ms × (1.00,1.01)  -3.22%
BenchmarkMandelbrot200            6.01ms × (1.00,1.00)    6.02ms × (1.00,1.00)  ~
BenchmarkGoParse                  9.63ms × (0.94,1.07)    9.79ms × (0.92,1.07)  ~
BenchmarkRegexpMatchEasy0_32       210ns × (1.00,1.00)     210ns × (1.00,1.01)  ~
BenchmarkRegexpMatchEasy0_1K       596ns × (0.99,1.01)     593ns × (0.99,1.01)  ~
BenchmarkRegexpMatchEasy1_32       184ns × (0.99,1.01)     182ns × (0.99,1.01)  ~
BenchmarkRegexpMatchEasy1_1K      1.01µs × (0.99,1.01)    1.01µs × (1.00,1.01)  ~
BenchmarkRegexpMatchMedium_32      327ns × (1.00,1.01)     331ns × (1.00,1.00)  +1.22%
BenchmarkRegexpMatchMedium_1K     93.0µs × (1.00,1.02)    92.6µs × (1.00,1.01)  ~
BenchmarkRegexpMatchHard_32       4.76µs × (0.95,1.01)    4.58µs × (0.99,1.05)  ~
BenchmarkRegexpMatchHard_1K        136µs × (1.00,1.01)     136µs × (1.00,1.01)  ~
BenchmarkRevcomp                   892ms × (1.00,1.01)     900ms × (0.99,1.06)  ~
BenchmarkTemplate                  175ms × (0.99,1.00)     171ms × (1.00,1.01)  -2.36%
BenchmarkTimeParse                 638ns × (1.00,1.00)     637ns × (1.00,1.00)  ~
BenchmarkTimeFormat                772ns × (1.00,1.00)     742ns × (1.00,1.00)  -3.95%

Change-Id: I6504e310cb9cf48a73d539c478b4dbcacde208b2
Reviewed-on: https://go-review.googlesource.com/9308
Reviewed-by: Austin Clements <austin@google.com>
2015-04-28 01:37:33 +00:00
Russ Cox
0ad4f8b1f7 cmd/internal/gc: emit write barriers at lower level
This is primarily preparation for inlining, not an optimization by itself,
but it still helps some.

name                                       old                     new          delta
BenchmarkBinaryTree17              18.2s × (0.99,1.01)     17.9s × (0.99,1.01)  -1.57%
BenchmarkFannkuch11                4.44s × (1.00,1.00)     4.42s × (1.00,1.00)  -0.40%
BenchmarkFmtFprintfEmpty           119ns × (0.95,1.02)     118ns × (0.96,1.02)  ~
BenchmarkFmtFprintfString          501ns × (0.99,1.02)     486ns × (0.99,1.01)  -2.89%
BenchmarkFmtFprintfInt             474ns × (0.99,1.00)     457ns × (0.99,1.01)  -3.59%
BenchmarkFmtFprintfIntInt          792ns × (1.00,1.00)     768ns × (1.00,1.01)  -3.03%
BenchmarkFmtFprintfPrefixedInt     574ns × (1.00,1.01)     584ns × (0.99,1.03)  +1.83%
BenchmarkFmtFprintfFloat           749ns × (1.00,1.00)     739ns × (0.99,1.00)  -1.34%
BenchmarkFmtManyArgs              2.94µs × (1.00,1.01)    2.77µs × (1.00,1.00)  -5.76%
BenchmarkGobDecode                39.5ms × (0.99,1.01)    39.3ms × (0.99,1.01)  ~
BenchmarkGobEncode                39.4ms × (1.00,1.01)    39.4ms × (0.99,1.00)  ~
BenchmarkGzip                      658ms × (1.00,1.01)     661ms × (0.99,1.01)  ~
BenchmarkGunzip                    142ms × (1.00,1.00)     142ms × (1.00,1.00)  +0.22%
BenchmarkHTTPClientServer          134µs × (0.99,1.01)     133µs × (0.98,1.01)  ~
BenchmarkJSONEncode               57.1ms × (0.99,1.01)    56.5ms × (0.99,1.01)  ~
BenchmarkJSONDecode                141ms × (1.00,1.00)     143ms × (1.00,1.00)  +1.09%
BenchmarkMandelbrot200            6.01ms × (1.00,1.00)    6.01ms × (1.00,1.00)  ~
BenchmarkGoParse                  10.1ms × (0.91,1.09)     9.6ms × (0.94,1.07)  ~
BenchmarkRegexpMatchEasy0_32       207ns × (1.00,1.01)     210ns × (1.00,1.00)  +1.45%
BenchmarkRegexpMatchEasy0_1K       592ns × (0.99,1.00)     596ns × (0.99,1.01)  +0.68%
BenchmarkRegexpMatchEasy1_32       184ns × (0.99,1.01)     184ns × (0.99,1.01)  ~
BenchmarkRegexpMatchEasy1_1K      1.01µs × (1.00,1.00)    1.01µs × (0.99,1.01)  ~
BenchmarkRegexpMatchMedium_32      327ns × (0.99,1.00)     327ns × (1.00,1.01)  ~
BenchmarkRegexpMatchMedium_1K     92.5µs × (1.00,1.00)    93.0µs × (1.00,1.02)  +0.48%
BenchmarkRegexpMatchHard_32       4.79µs × (0.95,1.00)    4.76µs × (0.95,1.01)  ~
BenchmarkRegexpMatchHard_1K        136µs × (1.00,1.00)     136µs × (1.00,1.01)  ~
BenchmarkRevcomp                   900ms × (0.99,1.01)     892ms × (1.00,1.01)  ~
BenchmarkTemplate                  170ms × (0.99,1.01)     175ms × (0.99,1.00)  +2.95%
BenchmarkTimeParse                 645ns × (1.00,1.00)     638ns × (1.00,1.00)  -1.16%
BenchmarkTimeFormat                740ns × (1.00,1.00)     772ns × (1.00,1.00)  +4.39%

Change-Id: I0be905e32791e0cb70ff01f169c4b309a971d981
Reviewed-on: https://go-review.googlesource.com/9159
Reviewed-by: Rick Hudson <rlh@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2015-04-28 01:37:05 +00:00
Josh Bleecher Snyder
673bd18805 test: gofmt run.go
Clean up after CL 5310.

Change-Id: Ib870e7b9d26eb118eefdaa3e76dcec4a4d459584
Reviewed-on: https://go-review.googlesource.com/9398
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-28 00:08:50 +00:00
Josh Bleecher Snyder
1fb948a029 test: set GOMAXPROCS=1 in fixedbugs/issue9110
With this fix,

GOMAXPROCS=8 ./all.bash

passes, at least on my machine.

Fixes #10216.

Change-Id: Ib5991950892a1399ec81aced0a52b435e6f83fdf
Reviewed-on: https://go-review.googlesource.com/9392
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2015-04-28 00:06:13 +00:00
Mikio Hara
9bef5cfb9b net: don't miss testing server teardowns when test fails early
Change-Id: I9fa678e43b4ae3970323cac474b5f86d4d933997
Reviewed-on: https://go-review.googlesource.com/9382
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-28 00:01:33 +00:00
Matthew Dempsky
8a413752fb test: reenable syntax tests
These were fixed a little while ago, but overlooked when reenabling
disabled tests.

Update #9968.

Change-Id: I301ef587e580c517a170ad08ff897118b58cedec
Reviewed-on: https://go-review.googlesource.com/9347
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
2015-04-27 23:48:00 +00:00
Rob Pike
181e81cfe4 doc/go1.5.txt: go doc
Change-Id: I883017b67e8fa76b6f123e8f9bcec3d6f820bbb3
Reviewed-on: https://go-review.googlesource.com/9348
Reviewed-by: Rob Pike <r@golang.org>
2015-04-27 23:24:27 +00:00
Rob Pike
a5de54a870 cmd/go,cmd/doc: add "go doc"
Add the new go doc command to the go command, installed in
the tool directory.

(Still to do: tests)

Fix cmd/dist to remove old "package documentation" code that was
stopping it from including cmd/go/doc.go in the build.

Implement the doc command. Here is the help info from "go help doc":

===
usage: go doc [-u] [package|[package.]symbol[.method]]

Doc accepts at most one argument, indicating either a package, a symbol within a
package, or a method of a symbol.

	go doc
	go doc <pkg>
	go doc <sym>[.<method>]
	go doc [<pkg>].<sym>[.<method>]

Doc interprets the argument to see what it represents, determined by its syntax
and which packages and symbols are present in the source directories of GOROOT and
GOPATH.

The first item in this list that succeeds is the one whose documentation is printed.
For packages, the order of scanning is determined by the file system, however the
GOROOT tree is always scanned before GOPATH.

If there is no package specified or matched, the package in the current directory
is selected, so "go doc" shows the documentation for the current package and
"go doc Foo" shows the documentation for symbol Foo in the current package.

Doc prints the documentation comments associated with the top-level item the
argument identifies (package, type, method) followed by a one-line summary of each
of the first-level items "under" that item (package-level declarations for a
package, methods for a type, etc.)

The package paths must be either a qualified path or a proper suffix of a path
(see examples below). The go tool's usual package mechanism does not apply: package
path elements like . and ...  are not implemented by go doc.

When matching symbols, lower-case letters match either case but upper-case letters
match exactly.

Examples:
	go doc
		Show documentation for current package.
	go doc Foo
		Show documentation for Foo in the current package.
		(Foo starts with a capital letter so it cannot match a package path.)
	go doc json
		Show documentation for the encoding/json package.
	go doc json
		Shorthand for encoding/json assuming only one json package
		is present in the tree.
	go doc json.Number (or go doc json.number)
		Show documentation and method summary for json.Number.
	go doc json.Number.Int64 (or go doc json.number.int64)
		Show documentation for the Int64 method of json.Number.

Flags:
	-u
		Show documentation for unexported as well as exported
		symbols and methods.

===

Still to do:

Tests.
Disambiguation when there is both foo and Foo.
Flag for case-sensitive matching.

Change-Id: I83d409a68688a5445f54297a7e7c745f749b9e66
Reviewed-on: https://go-review.googlesource.com/9227
Reviewed-by: Russ Cox <rsc@golang.org>
2015-04-27 23:22:26 +00:00
Austin Clements
02ba71e547 runtime/race: fix failing tests
Some race tests were sensitive to the goroutine scheduling order.
When this changed in commit e870f06, these tests started to fail.

Fix TestRaceHeapParam by ensuring that the racing goroutine has
run before the test exits. Fix TestRaceRWMutexMultipleReaders by
adding a third reader to ensure that two readers wind up on the
same side of the writer (and race with each other) regardless of
the schedule. Fix TestRaceRange by ensuring that the racing
goroutine runs before the main goroutine exits the loop it races
with.

Change-Id: Iaf002f8730ea42227feaf2f3c51b9a1e57ccffdd
Reviewed-on: https://go-review.googlesource.com/9402
Reviewed-by: Russ Cox <rsc@golang.org>
2015-04-27 23:12:00 +00:00
Russ Cox
f774e6a1f8 runtime/race: stop listening to external network addresses
This makes the OS X firewall box pop up.
Not run during all.bash so hasn't been noticed before.

Change-Id: I78feb4fd3e1d3c983ae3419085048831c04de3da
Reviewed-on: https://go-review.googlesource.com/9401
Reviewed-by: Austin Clements <austin@google.com>
2015-04-27 23:11:45 +00:00
Austin Clements
7c7cd69591 runtime: fix stack use accounting
ReadMemStats accounts for stacks slightly differently than the runtime
does internally. Internally, only stacks allocated by newosproc0 are
accounted in memstats.stacks_sys and other stacks are accounted in
heap_sys. readmemstats_m shuffles the statistics so all stacks are
accounted in StackSys rather than HeapSys.

However, currently, readmemstats_m assumes StackSys will be zero when
it does this shuffle. This was true until commit 6ad33be. If it isn't
(e.g., if something called newosproc0), StackSys+HeapSys will be
different before and after this shuffle, and the Sys sum that was
computed earlier will no longer agree with the sum of its components.

Fix this by making the shuffle in readmemstats_m not assume that
StackSys is zero.

Fixes #10585.

Change-Id: If13991c8de68bd7b85e1b613d3f12b4fd6fd5813
Reviewed-on: https://go-review.googlesource.com/9366
Reviewed-by: Russ Cox <rsc@golang.org>
2015-04-27 23:09:39 +00:00
David Crawshaw
d707a6e0e2 runtime: remove unnecessary noescape to fix netbsd
I introduced this build failure in golang.org/cl/9302 but failed to
notice due to the other failures on the dashboard.

Change-Id: I84bf00f664ba572c1ca722e0136d8a2cf21613ca
Reviewed-on: https://go-review.googlesource.com/9363
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Minux Ma <minux@golang.org>
2015-04-27 23:04:38 +00:00
Josh Bleecher Snyder
00d4a6b35d cmd/internal/gc, cmd/internal/ld: add memprofilerate flag
Also call runtime.GC before exit to ensure
that the profiler picks up all allocations.

Fixes #10537.

Change-Id: Ibfbfc88652ac0ce30a6d1ae392f919df6c1e8126
Reviewed-on: https://go-review.googlesource.com/9261
Reviewed-by: Dave Cheney <dave@cheney.net>
Reviewed-by: Minux Ma <minux@golang.org>
Run-TryBot: Minux Ma <minux@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
2015-04-27 22:21:40 +00:00
Austin Clements
23ce80efeb runtime/race: fix benchmark deadlock
Currently TestRaceCrawl fails to wg.Done for every wg.Adds if the
depth ever reaches 0. This causes the test to deadlock. Under the race
detector, this deadlock is not detected, so the test eventually times
out.

This only recently became a problem. Prior to commit e870f06 the depth
would never reach 0 because the strict round-robin goroutine schedule
ensured that all of the URLs were already "seen" by depth 2. Now that
the runtime prefers scheduling the most recently started goroutine,
the test is able to reach depth 0 and trigger this deadlock.

Change-Id: I5176302a89614a344c84d587073b364833af6590
Reviewed-on: https://go-review.googlesource.com/9344
Run-TryBot: Austin Clements <austin@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>
2015-04-27 20:54:34 +00:00
Dmitry Savintsev
8cb9c21cce regexp: trivial change in comments to update code.google.com link
Replaced code.google.com/p/re2/ with github.com/google/re2/ and
updated the file names (re2-exhaustive.txt.bz2 not re2.txt.gz)
as well as the re2 make command (make log).

Change-Id: I15937b0b8a898d78d45366857ed86421c8d69960
Reviewed-on: https://go-review.googlesource.com/9372
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2015-04-27 20:18:25 +00:00
Russ Cox
42da270024 runtime: fix race in BenchmarkPingPongHog
The master goroutine was returning before
the child goroutine had done its final i < b.N
(the one that fails and causes it to exit the loop)
and then the benchmark harness was updating
b.N, causing a read+write race on b.N.

Change-Id: I2504270a0de30544736f6c32161337a25b505c3e
Reviewed-on: https://go-review.googlesource.com/9368
Reviewed-by: Austin Clements <austin@google.com>
2015-04-27 20:10:11 +00:00
Austin Clements
33e0f3d853 runtime: fix some out of date comments and typos
Change-Id: I061057414c722c5a0f03c709528afc8554114db6
Reviewed-on: https://go-review.googlesource.com/9367
Reviewed-by: Rick Hudson <rlh@golang.org>
2015-04-27 20:08:38 +00:00
Josh Bleecher Snyder
9a0fd97ff3 runtime: remove a modulus calculation from pollorder
This is a follow-up to CL 9269, as suggested
by dvyukov.

There is probably even more that can be done
to speed up this shuffle. It will matter more
once CL 7570 (fine-grained locking in select)
is in and can be revisited then, with benchmarks.

Change-Id: Ic13a27d11cedd1e1f007951214b3bb56b1644f02
Reviewed-on: https://go-review.googlesource.com/9393
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
2015-04-27 19:36:37 +00:00
Austin Clements
1b01910c06 runtime: rename gcController.findRunnable to findRunnableGCWorker
This avoids confusion with the main findrunnable in the scheduler.

Change-Id: I8cf40657557a8610a2fe5a2f74598518256ca7f0
Reviewed-on: https://go-review.googlesource.com/9305
Reviewed-by: Rick Hudson <rlh@golang.org>
2015-04-27 19:26:42 +00:00