go, branch go1.7rc6

go1.7rc6

2016-08-08T18:42:30Z

Change-Id: Ie76b5af0ecc4c64c523110b44483c06e7031237c Reviewed-on: https://go-review.googlesource.com/25582 Reviewed-by: Chris Broadfoot

all: merge master into release-branch.go1.7

2016-08-08T18:30:51Z

7a62274 net/http: make Transport use new connection if over HTTP/2 concurrency limit 219ca60 doc: fix required OS X version inconsistency for binary downloads 26015b9 runtime: make stack 16-byte aligned for external code in _rt0_amd64_linux_lib 9fde86b runtime, syscall: fix kernel gettimeofday ABI change on iOS 10 3a03e87 os: check for waitid returning ENOSYS 1031675 net/http: update bundled http2 for flow control window adjustment fix da070be syscall: fix Gettimeofday on macOS Sierra f135c32 runtime: initialize hash algs before typemap Change-Id: Ie176f3db1e253d75ae8e56b16d3fd9900b37dde3

net/http: make Transport use new connection if over HTTP/2 concurrency limit

2016-08-08T17:53:51Z

The Go HTTP/1 client will make as many new TCP connections as the user requests. The HTTP/2 client tried to have that behavior, but the policy of whether a connection is re-usable didn't take into account the extra 1 stream counting against SETTINGS_MAX_CONCURRENT_STREAMS so in practice users were getting errors. For example, if the server's advertised max concurrent streams is 100 and 200 concurrrent Go HTTP requests ask for a connection at once, all 200 will think they can reuse that TCP connection, but then 100 will fail later when the number of concurrent streams exceeds 100. Instead, recognize the "no cached connections" error value in the shouldRetryRequest method, so those 100 will retry a new connection. This is the conservative fix for Go 1.7 so users don't get errors, and to match the HTTP/1 behavior. Issues #13957 and #13774 are the more involved bugs for Go 1.8. Updates #16582 Updates #13957 Change-Id: I1f15a7ce60c07a4baebca87675836d6fe03993e8 Reviewed-on: https://go-review.googlesource.com/25580 TryBot-Result: Gobot Gobot Reviewed-by: Ian Lance Taylor Reviewed-by: Chris Broadfoot Run-TryBot: Brad Fitzpatrick

doc: fix required OS X version inconsistency for binary downloads

2016-08-06T19:30:57Z

Updates #16625 Change-Id: Icac6705828bd9b29379596ba64b34d922b9002c3 Reviewed-on: https://go-review.googlesource.com/25548 Reviewed-by: Ian Lance Taylor

runtime: make stack 16-byte aligned for external code in _rt0_amd64_linux_lib

2016-08-05T23:56:07Z

Fixes #16618. Change-Id: Iffada12e8672bbdbcf2e787782c497e2c45701b1 Reviewed-on: https://go-review.googlesource.com/25550 Run-TryBot: Minux Ma Reviewed-by: Arjan Van De Ven Reviewed-by: Ian Lance Taylor TryBot-Result: Gobot Gobot

runtime, syscall: fix kernel gettimeofday ABI change on iOS 10

2016-08-05T20:47:34Z

Fixes #16570 on iOS. Thanks Daniel Burhans for reporting the bug and testing the fix. Change-Id: I43ae7b78c8f85a131ed3d93ea59da9f32a02cd8f Reviewed-on: https://go-review.googlesource.com/25481 Reviewed-by: Ian Lance Taylor Reviewed-by: Brad Fitzpatrick

os: check for waitid returning ENOSYS

2016-08-05T19:48:42Z

Reportedly waitid is not available for Ubuntu on Windows. Fixes #16610. Change-Id: Ia724f45a85c6d3467b847da06d8c65d280781dcd Reviewed-on: https://go-review.googlesource.com/25507 Run-TryBot: Ian Lance Taylor TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick

net/http: update bundled http2 for flow control window adjustment fix

2016-08-05T17:08:52Z

Updates bundled http2 to x/net/http2 git rev 075e191 for: http2: adjust flow control on open streams when processing SETTINGS https://golang.org/cl/25508 Fixes #16612 Change-Id: Ib0513201bff44ab747a574ae6894479325c105d2 Reviewed-on: https://go-review.googlesource.com/25543 Run-TryBot: Chris Broadfoot Reviewed-by: Ian Lance Taylor Reviewed-by: Chris Broadfoot TryBot-Result: Gobot Gobot

syscall: fix Gettimeofday on macOS Sierra

2016-08-04T21:42:44Z

Fixes #16606 Change-Id: I57465061b90e901293cd8b6ef756d6aa84ebd4a3 Reviewed-on: https://go-review.googlesource.com/25495 Reviewed-by: Quentin Smith Reviewed-by: Ian Lance Taylor Run-TryBot: Quentin Smith TryBot-Result: Gobot Gobot

runtime: initialize hash algs before typemap

2016-08-04T17:39:05Z

When compiling with -buildmode=shared, a map[int32]*_type is created for each extra module mapping duplicate types back to a canonical object. This is done in the function typelinksinit, which is called before the init function that sets up the hash functions for the map implementation. The result is typemap becomes unusable after runtime initialization. The fix in this CL is to move algorithm init before typelinksinit in the runtime setup process. (For 1.8, we may want to turn typemap into a sorted slice of types and use binary search.) Manually tested on GOOS=linux with: GOHOSTARCH=386 GOARCH=386 ./make.bash && \ go install -buildmode=shared std && \ cd ../test && \ go run run.go -linkshared Fixes #16590 Change-Id: Idc08c50cc70d20028276fbf564509d2cd5405210 Reviewed-on: https://go-review.googlesource.com/25469 Run-TryBot: David Crawshaw Reviewed-by: Keith Randall