- 21 Oct, 2016 1 commit
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Michael Munday authored
The m5 and m6 fields were the wrong way round. Fixes #17444. Change-Id: I10297064f2cd09d037eac581c96a011358f70aae Reviewed-on: https://go-review.googlesource.com/31130 Run-TryBot: Michael Munday <munday@ca.ibm.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Russ Cox <rsc@golang.org>
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- 20 Oct, 2016 16 commits
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David Chase authored
Adapt old test for prove's bounds check elimination. Added missing rule to generic rules that lead to differences between 32 and 64 bit platforms on sliceopt test. Added debugging to prove.go that was helpful-to-necessary to discover that missing rule. Lowered debugging level on prove.go from 3 to 1; no idea why it was previously 3. Change-Id: I09de206aeb2fced9f2796efe2bfd4a59927eda0c Reviewed-on: https://go-review.googlesource.com/23290 Run-TryBot: David Chase <drchase@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Keith Randall <khr@golang.org>
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Klaus Post authored
This exposes HuffmanOnly in zlib and gzip packages, which is currently unavailable. Change-Id: If5d103bbc8b5fce2f5d740fd103a235c5d1ed7cd Reviewed-on: https://go-review.googlesource.com/31186Reviewed-by:
Nigel Tao <nigeltao@golang.org> Reviewed-by:
Joe Tsai <thebrokentoaster@gmail.com> Run-TryBot: Joe Tsai <thebrokentoaster@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
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Robert Griesemer authored
Change-Id: If1d08a84c9295816489b1cfdd031ba12892ae963 Reviewed-on: https://go-review.googlesource.com/31598Reviewed-by:
Matthew Dempsky <mdempsky@google.com>
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Nigel Tao authored
This makes grayModel and gray16Model in color.go use the exact same formula as RGBToYCbCr in ycbcr.go. They were the same formula in theory, but in practice the color.go versions used a divide by 1000 and the ycbcr.go versions used a (presumably faster) shift by 16. This implies the nice property that converting an image.RGBA to an image.YCbCr and then taking only the Y channel is equivalent to converting an image.RGBA directly to an image.Gray. The difference between the two formulae is non-zero, but small: https://play.golang.org/p/qG7oe-eqHI Updates #16251 Change-Id: I288ecb957fd6eceb9626410bd1a8084d2e4f8198 Reviewed-on: https://go-review.googlesource.com/31538Reviewed-by:
Rob Pike <r@golang.org>
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David Chase authored
For very large input files, use of GOSSAFUNC to obtain a dump after compilation steps can lead to both unwieldy large output files and unwieldy larger processes (because the output is buffered in a string). This flag -d=ssa/<phase>/dump:<function name> provides finer control of what is dumped, into a smaller file, and with less memory overhead in the running compiler. The special phase name "build" is added to allow printing of the just-built ssa before any transformations are applied. This was helpful in making sense of the gogo/protobuf problems. The output format was tweaked to remove gratuitous spaces, and a crude -d=ssa/help help text was added. Change-Id: If7516e22203420eb6ed3614f7cee44cb9260f43e Reviewed-on: https://go-review.googlesource.com/23044 Run-TryBot: David Chase <drchase@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Alberto Donizetti authored
Fixes #16076 Change-Id: I91fa87b642592ee4604537dd8c3197cd61ec8b31 Reviewed-on: https://go-review.googlesource.com/31516 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Ian Lance Taylor <iant@golang.org>
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Michael Munday authored
Closes #17528. Change-Id: I2ba55ad4e41077808f882ed67a0549f0a00e25d0 Reviewed-on: https://go-review.googlesource.com/31596 Run-TryBot: Michael Munday <munday@ca.ibm.com> Reviewed-by:
Minux Ma <minux@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
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Ian Lance Taylor authored
Account for changes in https://golang.org/cl/31233. Change-Id: I3311c6850a3c714d18209fdff500dd817e9dfcb2 Reviewed-on: https://go-review.googlesource.com/31594Reviewed-by:
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Adam Langley authored
This change updates the vendored copy of x/crypto/poly1305, specifically to include the following changes: 3ded668 poly1305: enable assembly for ARM in Go 1.6. dec8741 poly1305: fix stack handling in sum_arm.s Fixes #17499. Change-Id: I8f152da9599bd15bb976f630b0ef602be05143d3 Reviewed-on: https://go-review.googlesource.com/31592 Run-TryBot: Adam Langley <agl@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Brad Fitzpatrick <bradfitz@golang.org>
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David Chase authored
Uncommented 4 comparison rules of this form: (NE (CMPWconst [0] (FLessThan cc)) yes no) -> (FLT cc yes no) Fixes #17507. Change-Id: I74f34f13526aeee619711c8281a66652d90a962a Reviewed-on: https://go-review.googlesource.com/31612 Run-TryBot: David Chase <drchase@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Cherry Zhang <cherryyz@google.com>
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David du Colombier authored
This issue has been fixed in CL 31390. Fixes #9554. Change-Id: Ib8ff4cb1ffcb7cdbf117510b98b4a7e13e4efd2b Reviewed-on: https://go-review.googlesource.com/31520 TryBot-Result: Gobot Gobot <gobot@golang.org> Run-TryBot: David du Colombier <0intro@gmail.com> Reviewed-by:
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Ilya Tocar authored
CVTSL2SS, CVTSQ2SS, CVTSL2SD, CVTSQ2SD preserve upper part of xmm register, introducing false dependency on a previous value. Break it by xoring destination with itself. Increases size of go executable by 320 bytes, but shows nice improvement on go1. Also fixes performance degradation introduced by 1.7. name old time/op new time/op delta BinaryTree17-4 2.20s ± 1% 2.19s ± 0% -0.36% (p=0.000 n=18+16) Fannkuch11-4 2.44s ± 1% 2.45s ± 2% +0.47% (p=0.030 n=20+20) FmtFprintfEmpty-4 40.9ns ± 7% 40.5ns ± 1% ~ (p=0.531 n=20+16) FmtFprintfString-4 111ns ± 2% 111ns ± 1% ~ (p=0.510 n=18+19) FmtFprintfInt-4 98.3ns ± 3% 99.3ns ± 1% +1.01% (p=0.003 n=20+18) FmtFprintfIntInt-4 148ns ± 3% 147ns ± 1% ~ (p=0.919 n=20+17) FmtFprintfPrefixedInt-4 149ns ± 1% 152ns ± 0% +1.73% (p=0.000 n=19+17) FmtFprintfFloat-4 231ns ± 0% 231ns ± 1% ~ (p=0.678 n=18+19) FmtManyArgs-4 667ns ± 1% 672ns ± 1% +0.73% (p=0.005 n=20+20) GobDecode-4 5.60ms ± 0% 5.61ms ± 0% +0.24% (p=0.000 n=20+20) GobEncode-4 4.74ms ± 0% 4.73ms ± 1% -0.20% (p=0.002 n=20+20) Gzip-4 199ms ± 0% 199ms ± 1% +0.35% (p=0.000 n=19+20) Gunzip-4 31.8ms ± 1% 31.5ms ± 1% -0.89% (p=0.000 n=20+20) HTTPClientServer-4 38.1µs ± 1% 38.0µs ± 1% ~ (p=0.117 n=19+18) JSONEncode-4 14.2ms ± 1% 13.4ms ± 0% -5.73% (p=0.000 n=20+20) JSONDecode-4 42.7ms ± 0% 42.7ms ± 1% +0.18% (p=0.019 n=18+19) Mandelbrot200-4 3.26ms ± 0% 2.99ms ± 0% -8.38% (p=0.000 n=19+19) GoParse-4 2.76ms ± 1% 2.76ms ± 1% ~ (p=0.583 n=20+20) RegexpMatchEasy0_32-4 69.5ns ± 0% 69.6ns ± 0% +0.10% (p=0.017 n=16+17) RegexpMatchEasy0_1K-4 703ns ± 0% 708ns ± 3% +0.65% (p=0.000 n=17+18) RegexpMatchEasy1_32-4 68.2ns ± 1% 68.2ns ± 2% ~ (p=0.094 n=18+20) RegexpMatchEasy1_1K-4 288ns ± 1% 288ns ± 0% ~ (p=0.403 n=17+18) RegexpMatchMedium_32-4 104ns ± 2% 103ns ± 1% ~ (p=0.110 n=20+16) RegexpMatchMedium_1K-4 31.7µs ± 3% 31.7µs ± 3% ~ (p=0.091 n=19+20) RegexpMatchHard_32-4 1.59µs ± 2% 1.58µs ± 2% ~ (p=0.083 n=20+20) RegexpMatchHard_1K-4 48.1µs ± 3% 47.9µs ± 2% ~ (p=0.461 n=20+19) Revcomp-4 344ms ± 0% 345ms ± 0% +0.08% (p=0.009 n=18+17) Template-4 44.8ms ± 1% 44.7ms ± 1% ~ (p=0.277 n=20+20) TimeParse-4 258ns ± 0% 258ns ± 0% ~ (all samples are equal) TimeFormat-4 275ns ± 0% 273ns ± 0% -0.64% (p=0.000 n=20+18) name old speed new speed delta GobDecode-4 137MB/s ± 0% 137MB/s ± 0% -0.24% (p=0.000 n=20+20) GobEncode-4 162MB/s ± 0% 162MB/s ± 0% +0.20% (p=0.002 n=20+20) Gzip-4 97.6MB/s ± 0% 97.3MB/s ± 1% -0.35% (p=0.000 n=19+20) Gunzip-4 610MB/s ± 1% 615MB/s ± 1% +0.89% (p=0.000 n=20+20) JSONEncode-4 136MB/s ± 1% 145MB/s ± 0% +6.08% (p=0.000 n=20+20) JSONDecode-4 45.5MB/s ± 0% 45.4MB/s ± 1% -0.17% (p=0.017 n=18+19) GoParse-4 21.0MB/s ± 1% 21.0MB/s ± 1% ~ (p=0.578 n=20+20) RegexpMatchEasy0_32-4 460MB/s ± 0% 460MB/s ± 0% -0.09% (p=0.031 n=16+17) RegexpMatchEasy0_1K-4 1.46GB/s ± 0% 1.45GB/s ± 3% -0.64% (p=0.000 n=17+18) RegexpMatchEasy1_32-4 469MB/s ± 0% 469MB/s ± 2% +0.06% (p=0.043 n=18+20) RegexpMatchEasy1_1K-4 3.55GB/s ± 1% 3.55GB/s ± 0% ~ (p=0.057 n=17+18) RegexpMatchMedium_32-4 9.61MB/s ± 2% 9.64MB/s ± 2% ~ (p=0.856 n=20+20) RegexpMatchMedium_1K-4 32.3MB/s ± 3% 32.3MB/s ± 3% ~ (p=0.085 n=19+20) RegexpMatchHard_32-4 20.1MB/s ± 2% 20.2MB/s ± 2% ~ (p=0.086 n=20+20) RegexpMatchHard_1K-4 21.3MB/s ± 3% 21.4MB/s ± 2% ~ (p=0.578 n=20+20) Revcomp-4 738MB/s ± 0% 737MB/s ± 0% -0.08% (p=0.009 n=18+17) Template-4 43.3MB/s ± 1% 43.4MB/s ± 1% ~ (p=0.274 n=20+20) Fixes #16982 Change-Id: If574d66f39f4183a9b1d5ffff0339909cc73f59d Reviewed-on: https://go-review.googlesource.com/31490 Run-TryBot: Ilya Tocar <ilya.tocar@intel.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Ilya Tocar authored
Add VBROADCASTSD, BROADCASTSS, MOVDDUP, MOVSHDUP, MOVSLDUP, VMOVDDUP, VMOVSHDUP, VMOVSLDUP. Fixes #16007 Change-Id: I9614e58eed6c1b6f299d9b4f0b1a7750aa7c1725 Reviewed-on: https://go-review.googlesource.com/31491 Run-TryBot: Ilya Tocar <ilya.tocar@intel.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
David Chase <drchase@google.com>
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Daniel Theophanes authored
Missing the DB mutex unlock on an early return after checking if the context has expired. Fixes #17518 Change-Id: I247cafcef62623d813f534a941f3d5a3744f0738 Reviewed-on: https://go-review.googlesource.com/31494Reviewed-by:
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Alberto Donizetti authored
Change-Id: Ie6258602554c5bb6685c9de42ccda84d297af1e2 Reviewed-on: https://go-review.googlesource.com/31515 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Joe Tsai authored
Issues fixed: * Could not handle quantity of seconds greater than 1<<31 on 32bit machines since strconv.ParseInt did not treat integers as 64b. * Did not handle negative timestamps properly if nanoseconds were used. Note that "-123.456" should result in a call to time.Unix(-123, -456000000). * Incorrectly allowed a '-' right after the '.' (e.g., -123.-456) * Did not detect invalid input after the truncation point (e.g., 123.123456789badbadbad). Note that negative timestamps are allowed by PAX, but are not guaranteed to be portable. See the relevant specification: <<< If pax encounters a file with a negative timestamp in copy or write mode, it can reject the file, substitute a non-negative timestamp, or generate a non-portable timestamp with a leading '-'. >>> Since the previous behavior already partially supported negative timestamps, we are bound by Go's compatibility rules to keep support for them. However, we should at least make sure we handle them properly. Change-Id: I5686997708bfb59110ea7981175427290be737d1 Reviewed-on: https://go-review.googlesource.com/31441 Run-TryBot: Joe Tsai <thebrokentoaster@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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- 19 Oct, 2016 23 commits
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Quentin Smith authored
Fixes #17491 Change-Id: Ic070cbed60fa893fed568e8fac448b86cd3e0cbc Reviewed-on: https://go-review.googlesource.com/31411Reviewed-by:
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Michael Munday authored
This is a more robust method for obtaining the availability of vx. Since this variable may be checked frequently I've also now padded it so that it will be in its own cache line. I've kept the other check (in hash/crc32) the same for now until I can figure out the best way to update it. Updates #15403. Change-Id: I74eed651afc6f6a9c5fa3b88fa6a2b0c9ecf5875 Reviewed-on: https://go-review.googlesource.com/31149Reviewed-by:
Austin Clements <austin@google.com>
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Austin Clements authored
oneNewExtraM creates a spare M and G for use with cgo callbacks. The G doesn't run right away, but goes directly into syscall status. For the garbage collector, it's marked as "scan valid" and not on the rescan list, but I forgot to also mark it as "scan done". As a result, gcMarkRootCheck thinks that the goroutine hasn't been scanned and panics. This only affects GODEBUG=gccheckmark=1 mode, since we otherwise skip the gcMarkRootCheck. Fixes #17473. Change-Id: I94f5671c42eb44bd5ea7dc68fbf85f0c19e2e52c Reviewed-on: https://go-review.googlesource.com/31139 Run-TryBot: Austin Clements <austin@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Rick Hudson <rlh@golang.org>
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Austin Clements authored
Change-Id: I79ebccdaefc434c47b77bd545cc3c50723c18b61 Reviewed-on: https://go-review.googlesource.com/31135 Run-TryBot: Austin Clements <austin@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Austin Clements authored
Updating the heap profile stats is one of the most expensive parts of mark termination other than stack rescanning, but there's really no need to do this with the world stopped. Move it to right after we've started the world back up. This creates a *very* small window where allocations from the next cycle can slip into the profile, but the exact point where mark termination happens is so non-deterministic already that a slight reordering here is unimportant. Change-Id: I2f76f22c70329923ad6a594a2c26869f0736d34e Reviewed-on: https://go-review.googlesource.com/31363 Run-TryBot: Austin Clements <austin@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Austin Clements authored
The only reason these flushes are still necessary at all is that gcmarknewobject doesn't flush its gcWork stats like it's supposed to. By changing gcmarknewobject to follow the standard protocol, the flushes become completely unnecessary because mark 2 ensures caches are flushed (and stay flushed) before we ever enter mark termination. In the garbage benchmark, this takes roughly 50 µs, which is surprisingly long for doing nothing. We still double-check after draining that they are in fact empty. Change-Id: Ia1c7cf98a53f72baa513792eb33eca6a0b4a7128 Reviewed-on: https://go-review.googlesource.com/31134 Run-TryBot: Austin Clements <austin@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Ian Lance Taylor authored
The pointer checking code needs to know the exact type of the parameter expected by the C function, so that it can use a type assertion to convert the empty interface returned by cgoCheckPointer to the correct type. Previously this was done by using a type conversion, but that meant that the code accepted arguments that were convertible to the parameter type, rather than arguments that were assignable as in a normal function call. In other words, some code that should not have passed type checking was accepted. This CL changes cgo to always use a function literal for pointer checking. Now the argument is passed to the function literal, which has the correct argument type, so type checking is performed just as for a function call as it should be. Since we now always use a function literal, simplify the checking code to run as a statement by itself. It now no longer needs to return a value, and we no longer need a type assertion. This does have the cost of introducing another function call into any call to a C function that requires pointer checking, but the cost of the additional call should be minimal compared to the cost of pointer checking. Fixes #16591. Change-Id: I220165564cf69db9fd5f746532d7f977a5b2c989 Reviewed-on: https://go-review.googlesource.com/31233 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Ian Lance Taylor authored
Just happened to notice that these names (funcAlign and friends) are never referenced outside their package, so no need to export them. Change-Id: I4bbdaa4b0ef330c3c3ef50a2ca39593977a83545 Reviewed-on: https://go-review.googlesource.com/31496 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
David Crawshaw <crawshaw@golang.org>
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Matthew Dempsky authored
mkbuiltin.go now generates builtin.go using go/ast instead of running the compiler, so we don't need the -A flag anymore. Passes toolstash -cmp. Change-Id: Ifa70f4f3c9feae10c723cbec81a0a47c39610090 Reviewed-on: https://go-review.googlesource.com/31497Reviewed-by:
Robert Griesemer <gri@golang.org>
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Matthew Dempsky authored
Generating binary export data requires a working Go compiler. Even trickier to change the export data format itself requires a careful bootstrapping procedure. Instead, simply generate normal Go code that lets us directly construct the builtin runtime declarations. Passes toolstash -cmp. Fixes #17508. Change-Id: I4f6078a3c7507ba40072580695d57c87a5604baf Reviewed-on: https://go-review.googlesource.com/31493 Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Edward Muller authored
Fixes #16965 Change-Id: I3638fe280a5b1063ff589e6e1ff8a97c74b77c66 Reviewed-on: https://go-review.googlesource.com/30359Reviewed-by:
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Joe Tsai authored
Relevant PAX specification: <<< If the <value> field is zero length, it shall delete any header block field, previously entered extended header value, or global extended header value of the same name. >>> We don't delete global extender headers since the Reader doesn't even support global headers (which the specification admits was a controversial feature). Change-Id: I2125a5c907b23a3dc439507ca90fa5dc47d474a9 Reviewed-on: https://go-review.googlesource.com/31440 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Joe Tsai authored
Took this opportunity to also embed tables in the functions that they are actually used in and other stylistic cleanups. There was no logical changes to the tests. Change-Id: Ifa724060532175f6f4407d6cedc841891efd8f7b Reviewed-on: https://go-review.googlesource.com/31436 Run-TryBot: Joe Tsai <thebrokentoaster@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Russ Cox authored
Add support for passing reflect.Values to and returning reflect.Values from any registered functions in the FuncMap, much as if they were interface{} values. Keeping the reflect.Value instead of round-tripping to interface{} preserves addressability of the value, which is important for method lookup. Change index and a few other built-in functions to use reflect.Values, making a loop using explicit indexing now match the semantics that range has always had. Fixes #14916. Change-Id: Iae1a2fd9bb426886a7fcd9204f30a2d6ad4646ad Reviewed-on: https://go-review.googlesource.com/31462Reviewed-by: -
Joe Tsai authored
The GNU format does not have a prefix field, so we should make no attempt to read it. It does however have atime and ctime fields. Since Go previously placed incorrect values here, we liberally read the atime and ctime fields and ignore errors so that old tar files written by Go can at least be partially read. This fixes half of #12594. The Writer is much harder to fix. Updates #12594 Change-Id: Ia32845e2f262ee53366cf41dfa935f4d770c7a30 Reviewed-on: https://go-review.googlesource.com/31444 Run-TryBot: Joe Tsai <thebrokentoaster@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Russ Cox authored
The panic leaves the lock in an unusable state. Trying to panic with a usable state makes the lock significantly less efficient and scalable (see early CL patch sets and discussion). Instead, use runtime.throw, which will crash the program directly. In general throw is reserved for when the runtime detects truly serious, unrecoverable problems. This problem is certainly serious, and, without a significant performance hit, is unrecoverable. Fixes #13879. Change-Id: I41920d9e2317270c6f909957d195bd8b68177f8d Reviewed-on: https://go-review.googlesource.com/31359Reviewed-by:
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Russ Cox authored
Before: ... appears in an ambiguous URL context. After: ... appears in an ambiguous context within a URL. It's a minor point, but it's confused multiple people. Try to make clearer that the ambiguity is "where exactly inside the URL?" Fixes #17319. Change-Id: Id834868d1275578036c1b00c2bdfcd733d9d2b7b Reviewed-on: https://go-review.googlesource.com/31465 Run-TryBot: Russ Cox <rsc@golang.org> Reviewed-by:
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David Crawshaw authored
Change-Id: I4270bf81511a5bf80ed146f5e66e4f8aeede2aa2 Reviewed-on: https://go-review.googlesource.com/31463Reviewed-by:
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Robert Griesemer authored
For #17428. Change-Id: Ia902b50cf0c40e3c2167fb573a39d328331c38c7 Reviewed-on: https://go-review.googlesource.com/31449Reviewed-by:
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Brad Fitzpatrick authored
Updates #14892 Change-Id: I640c6e1635ccdf611f219521a7d297a9885c4cb3 Reviewed-on: https://go-review.googlesource.com/31446 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Brad Fitzpatrick authored
This CL makes NewRequest set Body nil for known-zero bodies, and makes the http1 Transport not peek-Read a byte to determine whether there's a body. Background: Many fields of the Request struct have different meanings for whether they're outgoing (via the Transport) or incoming (via the Server). For outgoing requests, ContentLength and Body are documented as: // Body is the request's body. // // For client requests a nil body means the request has no // body, such as a GET request. The HTTP Client's Transport // is responsible for calling the Close method. Body io.ReadCloser // ContentLength records the length of the associated content. // The value -1 indicates that the length is unknown. // Values >= 0 indicate that the given number of bytes may // be read from Body. // For client requests, a value of 0 with a non-nil Body is // also treated as unknown. ContentLength int64 Because of the ambiguity of what ContentLength==0 means, the http1 and http2 Transports previously Read the first byte of a non-nil Body when the ContentLength was 0 to determine whether there was an actual body (with a non-zero length) and ContentLength just wasn't populated, or it was actually empty. That byte-sniff has been problematic and gross (see #17480, #17071) and was removed for http2 in a previous commit. That means, however, that users doing: req, _ := http.NewRequest("POST", url, strings.NewReader("")) ... would not send a Content-Length header in their http2 request, because the size of the reader (even though it was known, being one of the three common recognized types from NewRequest) was zero, and so the HTTP Transport thought it was simply unset. To signal explicitly-zero vs unset-zero, this CL changes NewRequest to signal explicitly-zero by setting the Body to nil, instead of the strings.NewReader("") or other zero-byte reader. This CL also removes the byte sniff from the http1 Transport, like https://golang.org/cl/31326 did for http2. Updates #17480 Updates #17071 Change-Id: I329f02f124659bf7d8bc01e2c9951ebdd236b52a Reviewed-on: https://go-review.googlesource.com/31445 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: -
Russ Cox authored
Fixes #16531. Change-Id: I41ec8123f2d3fbe063fd3b09a9366e69722793e5 Reviewed-on: https://go-review.googlesource.com/31355Reviewed-by:
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Russ Cox authored
Fixes #17092. Change-Id: If203d802a919e00594ddc1282782fc59a083fd63 Reviewed-on: https://go-review.googlesource.com/31458Reviewed-by:
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