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Commit Graph

22688 Commits

Author SHA1 Message Date
Jacob H. Haven
88399b2e46 crypto/x509: Fix parsing bug in uncommon CSR Attributes.
A CSR containing challengePassword or unstructuredName Attributes
(included in default OpenSSL prompts) would break ASN.1 parsing.
This updates the parsing structures to allow but then ignore these
fields.

See this CFSSL issue: https://github.com/cloudflare/cfssl/issues/115

Change-Id: I26a3bf1794589d27e6e763da88ae32276f0170c7
Reviewed-on: https://go-review.googlesource.com/8160
Reviewed-by: Adam Langley <agl@golang.org>
2015-04-03 00:28:30 +00:00
Mikio Hara
3a9024b498 net: move init function into net.go
It's a single, package-wide init function specified for the net package.

Change-Id: Id5894d65e1a92297cc16803cc5e4d4eef0b4b099
Reviewed-on: https://go-review.googlesource.com/8391
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-03 00:23:23 +00:00
Austin Clements
f244a1471d runtime: add cumulative GC CPU % to gctrace line
This tracks both total CPU time used by GC and the total time
available to all Ps since the beginning of the program and uses this
to derive a cumulative CPU usage percent for the gctrace line.

Change-Id: Ica85372b8dd45f7621909b325d5ac713a9b0d015
Reviewed-on: https://go-review.googlesource.com/8350
Reviewed-by: Russ Cox <rsc@golang.org>
2015-04-02 23:37:13 +00:00
Austin Clements
24ee948269 runtime: update gctrace line for new garbage collector
GODEBUG=gctrace=1 turns on a per-GC cycle trace line. The current line
is left over from the STW garbage collector and includes a lot of
information that is no longer meaningful for the concurrent GC and
doesn't include a lot of information that is important.

Replace this line with a new line designed for the new garbage
collector.

This new line is focused more on helping the user understand the
impact of the garbage collector on their program and less on telling
us, the runtime developers, everything that's happening inside
GC. It's designed to fit in 80 columns and intentionally omit some
potentially useful things that were in the old line. We might want a
"verbose" mode that adds information for us.

We'll be able to further simplify the line once we eliminate the STW
around enabling the write barrier. Then we'll have just one STW phase,
one concurrent phase, and one more STW phase, so we'll be able to
reduce the number of times from five to three.

Change-Id: Icc30939fe4576fb4491b4eac811649395727aa2a
Reviewed-on: https://go-review.googlesource.com/8208
Reviewed-by: Russ Cox <rsc@golang.org>
2015-04-02 23:37:06 +00:00
Jacob H. Haven
28f33b4a70 crypto/tls: make use of crypto.Signer and crypto.Decrypter
This change replaces all direct ECDSA/RSA sign and decrypt operations
with calls through the crypto.Signer and crypto.Decrypter interfaces.

This is a follow-up to https://go-review.googlesource.com/#/c/3900/
which added crypto.Decrypter and implemented it for RSA.

Change-Id: Ie0f3928448b285f329efcd3a93ca3fd5e3b3e42d
Reviewed-on: https://go-review.googlesource.com/7804
Reviewed-by: Adam Langley <agl@golang.org>
2015-04-02 23:19:57 +00:00
Robert Griesemer
5750b7118f cmd/internal/gc: move fix and flt functions into respective files (cleanups)
Also:
- introduce Mpprec (remove old constants)
- no semantic changes

Change-Id: Ie0e77e8e09bd68e09bcf8747a3d875270e736081
Reviewed-on: https://go-review.googlesource.com/8171
Reviewed-by: Russ Cox <rsc@golang.org>
2015-04-02 23:10:38 +00:00
Robert Griesemer
5bb89eb009 cmd/internal/gc: use big.Float to represent Mpflt bits
All multi-precision arithmetic is now based on math/big.

- passes all.bash
- added test cases for fixed bugs

Fixes #7740.
Fixes #6866.

Change-Id: I67268b91766970ced3b928260053ccdce8753d58
Reviewed-on: https://go-review.googlesource.com/7912
Reviewed-by: Russ Cox <rsc@golang.org>
2015-04-02 22:49:47 +00:00
Robert Griesemer
4da157a723 cmd/dist, cmd/internal/gc: switch gc from math/big to vendored math/big
Change-Id: Iab9a1f814acd53d5707bfcd6c3f9616c79fa7789
Reviewed-on: https://go-review.googlesource.com/7858
Reviewed-by: Russ Cox <rsc@golang.org>
2015-04-02 22:23:14 +00:00
Robert Griesemer
dec685921d cmd/internal/gc/big: updated vendored version of math/big (fix build)
Change-Id: I04c2bd18a47cc775c78d074fe521cef2b0d6e7f0
Reviewed-on: https://go-review.googlesource.com/8426
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>
2015-04-02 22:05:22 +00:00
Matthew Dempsky
398bf9d5a0 cmd/internal/gc, cmd/yacc: restore custom syntax error messages
This restores go.errors from before 3af0d79 along with a fixed up
version of the bisonerrors AWK script, translated to Go.

However, this means Yyerror needs access to the yacc parser's state,
which is currently private.  To workaround that, add a "state"
accessor method like the Lookahead method added in c7fa3c6.

Update issue #9968.

Change-Id: Ib868789e92fdb7d135442120a392457923e50121
Reviewed-on: https://go-review.googlesource.com/7270
Reviewed-by: Russ Cox <rsc@golang.org>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2015-04-02 21:56:24 +00:00
Robert Griesemer
e5a0d6399e cmd/internal/gc/big: vendored math/big for use by gc
This is vendored copy of the pure-Go version of math/big.
To update, run vendor.bash in place.

This will permit the use of the new big.Float functionality in
gc (which is not available in 1.4, the version used for bootstrapping).

Change-Id: I4dcdea875d54710005ca3fdea2e0e30422b1b46d
Reviewed-on: https://go-review.googlesource.com/7857
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
2015-04-02 21:27:23 +00:00
Matthew Dempsky
a1bb3030c8 cmd/yacc: generate arrays instead of slices where possible
Yacc generates a bunch of global variables of the form

    var yyFoo = []int{...}

where yyFoo is never subsequently modified to point to a different
slice.  Since these variables are implicitly compiled as

    var yyFoo = ([...]int{...})[:]

anyway, by simply converting them all to

    var yyFoo = [...]int{...}

we save sizeof(sliceStruct) bytes of data memory for each variable and
also make len(yyFoo) into compile-time constant expressions, which
shaves some bytes off text size:

    $ size 6g.before 6g.after
       text	   data	    bss	    dec	    hex	filename
    4598019	 605968	 342700	5546687	 54a2bf	6g.before
    4597810	 605552	 342700	5546062	 54a04e	6g.after

Change-Id: I53c7aa6efdb2d52738013e9d337a59afbfcb2494
Reviewed-on: https://go-review.googlesource.com/7520
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Dave Cheney <dave@cheney.net>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Russ Cox <rsc@golang.org>
2015-04-02 21:05:43 +00:00
Dave Cheney
01d005c616 cmd/8g, cmd/internal/gc: clean up GO386 handling
This change cleans up some of the uglyness introduced in 8fc73a39ef
by moving the gc.Use_sse into the gc.Arch struct and adjusting its
zero value to be more useful.

Change-Id: I26ff5d9ac57b3f25e936519e443de6583cdafa56
Reviewed-on: https://go-review.googlesource.com/7994
Reviewed-by: Russ Cox <rsc@golang.org>
2015-04-02 20:44:20 +00:00
David Crawshaw
33448d963c cmd/7g: fix ACMP entry in progtable
On arm64, CMP $foo, R is encoded as from=$foo, reg=R, not as from=$foo,
to=R. The progtable entry for ACMP incorrectly described the latter
form. Because of this, the registerizer was not accounting the registers
used in CMP instructions and was incorrectly re-assigning those registers.

This was an old problem, but it only became apparent after b115c35
(cmd/internal/gc: move cgen, regalloc, et al to portable code). Previous
to this commit, the compiler used a slightly larger register set for the
temps than it used for register variables. Since it had plenty registers
dedicated to temps, the registers used in CMP instruction never clashed
with registers assigned to register variables.

Fixes #10253

Change-Id: Iedf4bd882bd59440dff310ac0f81e0f53d80d7ed
Reviewed-on: https://go-review.googlesource.com/8387
Reviewed-by: Aram Hăvărneanu <aram@mgk.ro>
Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Minux Ma <minux@golang.org>
2015-04-02 20:18:28 +00:00
Robert Griesemer
bb298754ab math/big: implement missing special cases for binary operations
Change-Id: I9fc12b1a9b1554523e08839c1ff46c8668217ba1
Reviewed-on: https://go-review.googlesource.com/8381
Reviewed-by: Alan Donovan <adonovan@google.com>
2015-04-02 17:05:09 +00:00
Michael Schaller
d6dff636ea cmd/go: print SWIG warnings
Fixes #9053

Change-Id: I7b9af3647800671f065c366a6adf9278e64ebec9
Reviewed-on: https://go-review.googlesource.com/8400
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2015-04-02 16:37:48 +00:00
Austin Clements
822a24b602 runtime: remove checkgc code from hashmap
Currently hashmap is riddled with code that attempts to force a GC on
the next allocation if checkgc is set. This no longer works as
originally intended with the concurrent collector, and is apparently
no longer used anyway.

Remove checkgc.

Change-Id: Ia6c17c405fa8821dc2e6af28d506c1133ab1ca0c
Reviewed-on: https://go-review.googlesource.com/8355
Reviewed-by: Keith Randall <khr@golang.org>
2015-04-02 15:28:56 +00:00
Austin Clements
6134caf1f9 runtime: improve MemStats comments
This tries to clarify that Alloc and HeapAlloc are tied to how much
freeing has been done by the sweeper.

Change-Id: Id8320074bd75de791f39ec01bac99afe28052d02
Reviewed-on: https://go-review.googlesource.com/8354
Reviewed-by: Rick Hudson <rlh@golang.org>
2015-04-02 15:28:50 +00:00
Mikio Hara
52c84c34fd net: move test flags into main_test.go
Also updates the comments on test flags.

Change-Id: I8dbd90270e08728ab309ab88a3030e0f8e547175
Reviewed-on: https://go-review.googlesource.com/8394
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2015-04-02 09:07:24 +00:00
Robert Griesemer
bd09279c3f go/ast: fix ast.Inspect doc string
Fixes #10243.

Change-Id: I06ac53628980853faecbf1a57ff71b88098d65f2
Reviewed-on: https://go-review.googlesource.com/8382
Reviewed-by: Minux Ma <minux@golang.org>
2015-04-02 03:51:22 +00:00
Josh Bleecher Snyder
ad3600945a runtime: auto-generate duff routines
This makes it easier to experiment with alternative implementations.

While we're here, update the comments.

No functional changes. Passes toolstash -cmp.

Change-Id: I428535754908f0fdd7cc36c214ddb6e1e60f376e
Reviewed-on: https://go-review.googlesource.com/8310
Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2015-04-02 02:37:59 +00:00
Josh Bleecher Snyder
102b80652f cmd/internal/gc: make class uint8 throughout
This prevents conversion noise.

No functional changes. Passes toolstash -cmp.

Change-Id: I238adf28680f875217827931a689ce7f19a9b371
Reviewed-on: https://go-review.googlesource.com/8164
Reviewed-by: David Chase <drchase@google.com>
2015-04-02 02:16:49 +00:00
Mikio Hara
8b0e38ffb4 net: deflake TestDialTimeout
This change makes TestDialTimeout work on almost all the supported
platforms.

Updates #3016.
Updates #3307.
Updates #3867.
Updates #5380.
Updates #5349.

Change-Id: Iacf0ebea23cdd8f6c0333d70c667a5a5f5eb0ed2
Reviewed-on: https://go-review.googlesource.com/8220
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-02 01:04:49 +00:00
Josh Bleecher Snyder
fb4b46738c doc/go1.5: add Stats to database/sql
Change-Id: I7b0c186ea292655f7ff45c15ac29f6d1b71ef132
Reviewed-on: https://go-review.googlesource.com/8370
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
2015-04-01 23:34:55 +00:00
Mikio Hara
93553dd216 net: fix data race in benchmarks
Fixes #10307.

Change-Id: If70f36a6f1c4e465a47a0bc4d38b318424111106
Reviewed-on: https://go-review.googlesource.com/8330
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-01 22:02:41 +00:00
David Symonds
9b696be08b go/scanner: Simplify ErrorList.Sort implementation.
It functions exactly the same, but this is the more common
style for these kinds of multi-key comparison functions,
and is more regular.

Change-Id: I46630948f893bcc96c05eb3d36eb82e1d97a6fa0
Reviewed-on: https://go-review.googlesource.com/8358
Reviewed-by: Robert Griesemer <gri@golang.org>
2015-04-01 21:32:47 +00:00
Robert Griesemer
919a6fbeab math/big: faster Int.Binomial(n, k) for k > n/2
benchmark             old ns/op     new ns/op     delta
BenchmarkBinomial     478664        4410          -99.08%

Fixes #10084.

Change-Id: Ib75034428e32c79c9a660ae9f9bd396afc6a7f11
Reviewed-on: https://go-review.googlesource.com/8351
Reviewed-by: Alan Donovan <adonovan@google.com>
2015-04-01 19:35:35 +00:00
Josh Bleecher Snyder
3ed9e4ca3c cmd/internal/gc: unembed Node.Func
This is a follow-up to CL 7360.

It was generated with eg and gofmt -r.

The only manual changes are the unembedding in syntax.go
and backporting changes from y.go to go.y.

Passes toolstash -cmp.

Change-Id: I3d6d06ecb659809a4bc8592395d5b9a18967218e
Reviewed-on: https://go-review.googlesource.com/8053
Reviewed-by: Russ Cox <rsc@golang.org>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
2015-04-01 18:21:22 +00:00
Josh Bleecher Snyder
57279ba752 cmd/internal/gc: separate func-only Node fields
Nodes dominate gc's memory usage, but many fields are only used
for a subset of kinds of nodes. This change pulls out fields
used only for func-like Nodes. This reduces the size of the
Node struct on a 64-bit machine from 504 bytes to 416 bytes (-17%).

Compiling the runtime, 1.5% of nodes have a non-nil Func.
In html/template, 2.7% of nodes have a non-nil Func.

This change introduces an extra alloc and associated GC overhead
when Func is non-nil. However, when Func is nil, as it almost
always is, it spares the garbage collector scanning some Node fields.
Empirically, this change appears to be roughly neutral with regard to GC.

To keep the diff readable, this CL uses an embedded Func field.
A subsequent CL will unembed the field.

Passes toolstash -cmp.

Change-Id: Ide86aa954b097fb8e6154f0811d3691497477004
Reviewed-on: https://go-review.googlesource.com/7360
Reviewed-by: Russ Cox <rsc@golang.org>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2015-04-01 18:00:20 +00:00
Jan Mercl
9fd87bd501 go/scanner: Stabilize (*ErrorList).Sort
This change stabilizes the result of Sort when the error list contains
multiple items for same position. To stabilize the result, newly also
the Msg field is considered.

The motivation is to avoid diffs of sorted scanner.ErrorList output
in repository tracked logs like:

-testdata/foo.go:19:44: "bar"
 testdata/foo.go:19:44: "qux"
+testdata/foo.go:19:44: "bar"

The change was approved at [0] before submitting.

As a side effect, one file in go/parser/testdata must be updated as
well. For this file the parser produces two different errors:

testdata/issue3106.src:22:5: expected ';', found 'if'
testdata/issue3106.src:22:5: expected operand, found 'if'

Before comparing the actual and expected errors, the former are
filtered to keep only one error per source line[1]. With the new
(*ErrorList).Less the outcome is the other error than before which is
kept after the call to RemoveMultiplies.

[0]: https://groups.google.com/d/msg/golang-nuts/5ChC0XiIwlU/rol_yb2gTj4J
[1]:
9d0239771a/src/go/parser/error_test.go (L160)

Change-Id: Ib72c98a891cdeef34705c22dfbeb0408dcdfddf8
Reviewed-on: https://go-review.googlesource.com/8340
Reviewed-by: Robert Griesemer <gri@golang.org>
2015-04-01 17:39:57 +00:00
Sebastien Binet
9a3ee2d217 cmd/gofmt, go/format: refactor common pieces into internal/format
cmd/gofmt and go/format had 3 functions (parse, format and isSpace)
that had to be kept in-sync.

This CL extracts these 3 functions and refactors them into a new
internal/format package.
This CL is just code reorganization with no behavior nor semantic
change.

Change-Id: I593f24e9d3cadbbd9559a67e3b1d2ff190b4fd90
Reviewed-on: https://go-review.googlesource.com/6760
Reviewed-by: Robert Griesemer <gri@golang.org>
2015-04-01 17:35:26 +00:00
Josh Bleecher Snyder
b09925b31d cmd/5g etc: merge simple case expressions onto fewer lines
The c2go translation left a lot of case expressions on separate lines.
Merge expressions onto single lines subject to these constraints:

* Max 4 clauses, all literals or names
* Don't move expressions with comments

The change was created by running http://play.golang.org/p/yHajs72h-g:

$ mergecase cmd/internal/{ld,gc,obj}/*.go cmd/internal/obj/*/*.go

Passes toolstash -cmp.

Change-Id: Iba41b390d302e5486e5dc6ba7599a92270676556
Reviewed-on: https://go-review.googlesource.com/7593
Reviewed-by: Russ Cox <rsc@golang.org>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
2015-04-01 17:27:22 +00:00
Preetam Jinka
2c20eda1d8 compress/flate: fix typo in comment
Change-Id: I32ec2d8cb838fb850b3779726cf347dac21dff68
Reviewed-on: https://go-review.googlesource.com/8322
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-01 16:48:04 +00:00
Josh Bleecher Snyder
94410c794e cmd/gc: teach componentgen about string constants
This makes it cheaper to copy string literals.
This happens just about anywhere that they are used.

Example:

func f() string {
	return "f"
}

Using 6g, compiler output before:

"".f t=1 size=32 value=0 args=0x10 locals=0x0
	0x0000 00000 (p.go:3)	TEXT	"".f+0(SB),4,$0-16
	0x0000 00000 (p.go:3)	FUNCDATA	$0,gclocals·d64e51a4c4bfeaa840e480961ec6b0b3+0(SB)
	0x0000 00000 (p.go:3)	FUNCDATA	$1,gclocals·3280bececceccd33cb74587feedb1f9f+0(SB)
	0x0000 00000 (p.go:4)	LEAQ	go.string."f"+0(SB),BX
	0x0007 00007 (p.go:4)	MOVQ	(BX),BP
	0x000a 00010 (p.go:4)	MOVQ	BP,"".~r0+8(FP)
	0x000f 00015 (p.go:4)	MOVQ	8(BX),BP
	0x0013 00019 (p.go:4)	MOVQ	BP,"".~r0+16(FP)
	0x0018 00024 (p.go:4)	RET	,

After:

"".f t=1 size=32 value=0 args=0x10 locals=0x0
	0x0000 00000 (p.go:3)	TEXT	"".f+0(SB),4,$0-16
	0x0000 00000 (p.go:3)	FUNCDATA	$0,gclocals·d64e51a4c4bfeaa840e480961ec6b0b3+0(SB)
	0x0000 00000 (p.go:3)	FUNCDATA	$1,gclocals·3280bececceccd33cb74587feedb1f9f+0(SB)
	0x0000 00000 (p.go:4)	MOVQ	$go.string."f"+16(SB),BX
	0x0007 00007 (p.go:4)	MOVQ	BX,"".~r0+8(FP)
	0x000c 00012 (p.go:4)	MOVQ	$1,"".~r0+16(FP)
	0x0015 00021 (p.go:4)	RET	,

The leading MOVQ here will be converted into a LEAQ by the linker,
but there is still a net reduction of two MOVQs.

Before:

TEXT main.f(SB)
        p.go:4  0x2000  488d1d49500500  LEAQ 0x55049(IP), BX
        p.go:4  0x2007  488b2b          MOVQ 0(BX), BP
        p.go:4  0x200a  48896c2408      MOVQ BP, 0x8(SP)
        p.go:4  0x200f  488b6b08        MOVQ 0x8(BX), BP
        p.go:4  0x2013  48896c2410      MOVQ BP, 0x10(SP)
        p.go:4  0x2018  c3              RET

After:

TEXT main.f(SB)
        p.go:4  0x2000  488d1dd94c0500          LEAQ 0x54cd9(IP), BX
        p.go:4  0x2007  48895c2408              MOVQ BX, 0x8(SP)
        p.go:4  0x200c  48c744241001000000      MOVQ $0x1, 0x10(SP)
        p.go:4  0x2015  c3                      RET

The performance improvement is small but widespread.

As a nice small example, net/url's sole benchmark using 6g:

benchmark           old ns/op     new ns/op     delta
BenchmarkString     16372         16118         -1.55%

And with 8g:

benchmark           old ns/op     new ns/op     delta
BenchmarkString     22034         21709         -1.47%

Change-Id: I4ce202ee7dbd4057be869e2faaaa638c28a1fff0
Reviewed-on: https://go-review.googlesource.com/2587
Reviewed-by: Russ Cox <rsc@golang.org>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
2015-04-01 16:32:20 +00:00
Andrei Korzhevskii
297c1d297f database/sql: provide stats on number of open connections to the database.
This change provides a convenient way to monitor database connection pool.

Change-Id: I4b3757855b43f3b254acf9312e2a16e2f87840d0
Reviewed-on: https://go-review.googlesource.com/7950
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2015-04-01 15:24:53 +00:00
Dave Cheney
9d0239771a cmd/go: always link external test packages first when using gccgo
This CL is an amagamation of several fixes Canonical have made on their
fork of the cmd/go tool (packaged as gccgo-go.deb on Ubuntu 14.04+).

Additionally this CL brings gccgoToolchain.ldi() up to date with the version
that will ship in gccgo-5.0. As gccgo is most likely to be used with its
own version of the go tool that it supples it makes good sense that the libgo
version should dictate the contents of gccgotoolchain.ld()

Please see https://codereview.appspot.com/222890043/ for more details on the
issues fixed.

Change-Id: Icf7deb43f8e80b424757f1673e6bca7a0aa2a1ac
Reviewed-on: https://go-review.googlesource.com/8250
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-01 09:10:59 +00:00
Evan Phoenix
9c0375277c text/scanner: Fix EOF reporting on strange Readers
Currently, scanner uses -1 to represent 2 different states:

1. I haven't yet scanned anything, call it "Beginning of File"
2. I've reached the end of the input, ie EOF

The result of this behavior is that calling Peek() when next()
has detected the end of the input and set s.ch to scanner.EOF,
is that Peek() things "oh, s.ch is < 0, which to me means that
I haven't scanned any next yet, let me try and clear the BOM
marker."

When this behavior is run on a typical IO, next() will issue
a Read and get (0, io.EOF) back for the second time without
blocking and Peek() will return scanner.EOF.

The bug comes into play when, inside a terminal, hitting Control-D.
This causes the terminal to return a EOF condition to the reader
but it does not actually close the fd.

So, combining these 2 situations, we arrive at the bug:

What is expected: hitting Control-D in a terminal will make Peek()
return scanner.EOF instantly.

What actually happens:

0. Code waiting in Next()
1. User hits Control-D
2. fd returns EOF condition
3. EOF bubbles it's way out to line 249 in scanner.go
4. next() returns scanner.EOF
5. Next() saves the scanner.EOF to s.ch and returns the previous value
6. Peek() runs, sees s.ch < 0, mistakenly thinks it hasn't run yet and
   tries to read the BOM marker.
7. next() sees the buffer is empty and tries to fill it again, blocking
   on line 249.

The fix is simple: use a different code to indicate that no data
has been scanned.

Change-Id: Iee8f4da5881682c4d4c36b93b9bf397ac5798179
Reviewed-on: https://go-review.googlesource.com/7913
Reviewed-by: Robert Griesemer <gri@golang.org>
2015-04-01 03:39:22 +00:00
Martin Möhrmann
15e66f9d01 fmt: improve test coverage of %x and %X format variations for strings
The tests in the basic string section are now covering more code paths
for encoding a string into the hexadecimal representation of its bytes.

Changed the basic string and basic bytes tests so that they mirror each other.

Change-Id: Ib5dc7b33876769965f9aba2ac270040abc4b2451
Reviewed-on: https://go-review.googlesource.com/2611
Reviewed-by: Robert Griesemer <gri@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
2015-04-01 00:55:30 +00:00
Mikio Hara
29d1f3b85c net: add socket system call hooks for testing
This change adds socket system call hooks to existing test cases for
simulating a bit complicated network conditions to help making timeout
and dual IP stack test cases work more properly in followup changes.

Also test cases print debugging information in non-short mode like the
following:

Leaked goroutines:
net.TestWriteTimeout.func2(0xc20802a5a0, 0xc20801d000, 0x1000, 0x1000, 0xc2081d2ae0)
	/go/src/net/timeout_test.go:170 +0x98
created by net.TestWriteTimeout
	/go/src/net/timeout_test.go:173 +0x745
net.runDatagramPacketConnServer(0xc2080730e0, 0x2bd270, 0x3, 0x2c1770, 0xb, 0xc2081d2ba0, 0xc2081d2c00)
	/go/src/net/server_test.go:398 +0x667
created by net.TestTimeoutUDP
	/go/src/net/timeout_test.go:247 +0xc9
	(snip)

Leaked sockets:
3: {Cookie:615726511685632 Err:<nil> SocketErr:0}
5: {Cookie:7934075906097152 Err:<nil> SocketErr:0}

Socket statistical information:
{Family:1 Type:805306370 Protocol:0 Opened:17 Accepted:0 Connected:5 Closed:17}
{Family:2 Type:805306369 Protocol:0 Opened:450 Accepted:234 Connected:279 Closed:636}
{Family:1 Type:805306369 Protocol:0 Opened:11 Accepted:5 Connected:5 Closed:16}
{Family:28 Type:805306369 Protocol:0 Opened:95 Accepted:22 Connected:16 Closed:116}
{Family:2 Type:805306370 Protocol:0 Opened:84 Accepted:0 Connected:34 Closed:83}
{Family:28 Type:805306370 Protocol:0 Opened:52 Accepted:0 Connected:4 Closed:52}

Change-Id: I0e84be59a0699bc31245c78e2249423459b8cdda
Reviewed-on: https://go-review.googlesource.com/6390
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-03-31 23:07:42 +00:00
Robert Griesemer
fa85a7206d math/big: remove NaN support - just not worth it
NaNs make the API more complicated for no real good reasons.
There are few operations that produce NaNs with IEEE arithmetic,
there's no need to copy the behavior. It's easy to test for these
scenarios and avoid them (on the other hand, it's not easy to test
for overflow or underflow, so we want to keep +/-Inf).

Also:
- renamed IsNeg -> Signbit (clearer, especially for x == -0)
- removed IsZero           (Sign() == 0 is sufficient and efficient)
- removed IsFinite         (now same as !IsInf)

Change-Id: I3f3b4445c325d9bbb1bf46ce2e298a6aeb498e07
Reviewed-on: https://go-review.googlesource.com/8280
Reviewed-by: Alan Donovan <adonovan@google.com>
2015-03-31 23:05:31 +00:00
Michael Hudson-Doyle
67426a8a9e runtime, cmd/internal/ld: change runtime to use a single linker symbol
In preparation for being able to run a go program that has code
in several objects, this changes from having several linker
symbols used by the runtime into having one linker symbol that
points at a structure containing the needed data.  Multiple
object support will construct a linked list of such structures.

A follow up will initialize the slices in the themoduledata
structure directly from the linker but I was aiming for a minimal
diff for now.

Change-Id: I613cce35309801cf265a1d5ae5aaca8d689c5cbf
Reviewed-on: https://go-review.googlesource.com/7441
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-03-31 22:45:07 +00:00
Michael Hudson-Doyle
0de359da30 cmd/internal/gc: directly produce importpath of package being compiled
Relying on an importing package being linked at the same time as the
imported package does not work in the shared library world.

This also lets us remove some obscure code from the linker.

Change-Id: I57cd5447b42a1a6129b02951d44efffb10cf64be
Reviewed-on: https://go-review.googlesource.com/7797
Reviewed-by: Russ Cox <rsc@golang.org>
2015-03-31 20:31:55 +00:00
Robert Griesemer
8d267b9b59 math/big: fixed Float.Float64, implemented Float.Float32
- fix bounds checks for exponent range of denormalized numbers
- use correct rounding precision for denormalized numbers
- added extra tests

Change-Id: I6be56399afd0d9a603300a2e44b5539e08d6f592
Reviewed-on: https://go-review.googlesource.com/8096
Reviewed-by: Alan Donovan <adonovan@google.com>
2015-03-31 19:36:55 +00:00
Brad Fitzpatrick
f8fd5502ec doc: add another go1.5.txt performance item, sort gc items
Change-Id: I9c2b9143d80d253d90d12d2b7686e045ec19c96c
Reviewed-on: https://go-review.googlesource.com/8291
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2015-03-31 13:56:18 +00:00
Alex Brainman
34ee744d00 crypto/x509: use syscall.GetVersion instead of internal/syscall/windows.GetVersion
cl8167 introduced internal/syscall/windows.GetVersion, but we already
have that function in syscall.GetVersion. Use that instead.
Also revert all internal/syscall/windows cl8167 changes.

Change-Id: I512a5bf4b3b696e93aaf69e9e8b7df7022670ec0
Reviewed-on: https://go-review.googlesource.com/8302
Reviewed-by: Daniel Theophanes <kardianos@gmail.com>
Reviewed-by: Minux Ma <minux@golang.org>
2015-03-31 08:11:24 +00:00
Austin Clements
a2f3d73fee runtime: improve comment about non-preemption during GC work
Currently, gcDrainN is documented saying that it must be run on the
system stack. In fact, the problem and solution here are somewhat
subtler. First, it doesn't have to happen on the system stack, it just
has to be non-stoppable (that is, non-preemptible). Second, this isn't
specific to gcDrainN (though gcDrainN is perhaps the most surprising
instance); it's general to anything that uses the gcWork structure.

Move the comment to gcWork and generalize it.

Change-Id: I5277b5abb070e47f8d783bc15a310b379c6adc22
Reviewed-on: https://go-review.googlesource.com/8247
Reviewed-by: Rick Hudson <rlh@golang.org>
2015-03-31 01:05:38 +00:00
Austin Clements
a4374c1de1 runtime: fix another out of date comment in GC
gcDrain used to be passed a *workbuf to start draining from, but now
it takes a gcWork, which hides whether or not there's an initial
workbuf. Update the comment to match this.

Change-Id: I976b58e5bfebc451cfd4fa75e770113067b5cc07
Reviewed-on: https://go-review.googlesource.com/8246
Reviewed-by: Rick Hudson <rlh@golang.org>
2015-03-31 01:05:31 +00:00
John Potocny
6262192cd0 strings: Add benchmark test for trim function
The strings.Trim function and variants allocate memory on the heap when creating a function to pass into TrimFunc.
Add a benchmark to document the behavior; an issue will be submitted to address this behavior in the compiler if possible.

Change-Id: I8b66721f077951f7e7b8cf3cf346fac27a9b68c0
Reviewed-on: https://go-review.googlesource.com/8200
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-03-31 00:40:55 +00:00
Lee Packham
c45751e8a5 runtime: allow pointers to strings to be printed
Being able to printer pointers to strings means one will able to output
the result of things like the flag library and other components that use
string pointers.

While here, adjusted the tests for gdb to test original string pretty
printing as well as pointers to them. It was doing it via the map before
but for completeness this ensures it's tested as a unit.

Change-Id: I4926547ae4fa6c85ef74301e7d96d49ba4a7b0c6
Reviewed-on: https://go-review.googlesource.com/8217
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-03-30 23:59:24 +00:00
Rob Pike
6ca91d264f cmd/internal/obj/arm64: delete needless closure in for claus
A residue of the automatic translation, this closure is easily rewritten
to a simpler, smaller, and faster construct.

Discovered while analyzing #10269, which I still plan to fix.

Change-Id: I76b12290280d81880c446b4cf75da633a94482d4
Reviewed-on: https://go-review.googlesource.com/8270
Reviewed-by: Dave Cheney <dave@cheney.net>
Reviewed-by: Minux Ma <minux@golang.org>
2015-03-30 22:36:43 +00:00