1
0
mirror of https://github.com/golang/go synced 2024-09-30 03:24:39 -06:00
Commit Graph

44499 Commits

Author SHA1 Message Date
Bryan C. Mills
797124f5ff cmd/go/internal/test: keep looking for go command flags after ambiguous test flag
Fixes #40763

Change-Id: I275970d1f8561414571a5b93e368d68fa052c60f
Reviewed-on: https://go-review.googlesource.com/c/go/+/248618
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
2020-08-17 19:45:42 +00:00
Bryan C. Mills
1b86bdbdc3 cmd/test2json: do not emit a final Action if the result is not known
If we are parsing a test output, and the test does not end in the
usual PASS or FAIL line (say, because it panicked), then we need the
exit status of the test binary in order to determine whether the test
passed or failed. If we don't have that status available, we shouldn't
guess arbitrarily — instead, we should omit the final "pass" or "fail"
action entirely.

(In practice, we nearly always DO have the final status, such as when
running 'go test' or 'go tool test2json some.exe'.)

Fixes #40132

Change-Id: Iae482577361a6033395fe4a05d746b980e18c3de
Reviewed-on: https://go-review.googlesource.com/c/go/+/248624
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
2020-08-17 19:43:21 +00:00
Michael Matloob
f30044a03b cmd/go/internal: remove some users of par.Work
par.Work is used in a number of places as a parallel
work queue. This change replaces it with goroutines
and channels in a number of simpler places where it's
used.

Change-Id: I0620eda46ec7b2c0599a8b9361639af7bb73a05a
Reviewed-on: https://go-review.googlesource.com/c/go/+/248326
Run-TryBot: Michael Matloob <matloob@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2020-08-17 18:32:49 +00:00
Michael Matloob
2ac4bf3802 cmd/go: add span for modload.LoadBuildList
This change adds context, and a span to modload.LoadBuildList and
propagates context into modload.BuildList. It's the start
of a run of CLs to add trace spans for module operations.

Updates #38714

Change-Id: I0d58dd394051526338092dc9a5ec29a9e087e4e4
Reviewed-on: https://go-review.googlesource.com/c/go/+/248325
Run-TryBot: Michael Matloob <matloob@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2020-08-17 18:32:28 +00:00
Michael Matloob
ebccba7954 cmd/go: process -debug-trace flag for cmd/test and cmd/vet
These commands are build-like commands that do their own flag
processing, so the value of debug-trace isn't available until
the command starts running. Start tracing in the cmd's run
function.

Updates #38714

Change-Id: I4d633e6ee907bf09feac52c2aff3daceb9b20e12
Reviewed-on: https://go-review.googlesource.com/c/go/+/248324
Run-TryBot: Michael Matloob <matloob@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2020-08-17 18:32:15 +00:00
Michael Matloob
38fea3a4ec cmd/go: add tracing instrumentation to load.TestPackagesFor
This change adds tracing instrumentation into load.TestPackagesFor,
propagating context through its callers.

Updates #38714

Change-Id: I80fefaf3116ccccffaa8bb7613a656bda867394c
Reviewed-on: https://go-review.googlesource.com/c/go/+/248323
Run-TryBot: Michael Matloob <matloob@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2020-08-17 18:31:55 +00:00
Michael Matloob
15b98e55d1 cmd/go: mark trace flows between actions
This could help make it easier to identify blocking
dependencies when examining traces. Flows can be turned
off when viewing traces to remove potential distractions.

Updates #38714

Change-Id: Ibfd3f1a1861e3cac31addb053a2fca7ee796c4d7
Reviewed-on: https://go-review.googlesource.com/c/go/+/248322
Run-TryBot: Michael Matloob <matloob@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2020-08-17 18:31:43 +00:00
Michael Matloob
a26d687ebb cmd/go: propagate context into Action.Func calls
Action.Func is now a func(*Builder, context.Context, *Action), so that
contexts can be propagated into the action funcs. While context
is traditionally the first parameter of a function, it's the second
parameter of Action.Func's type to continue to allow for methods
on Builder to be used as functions taking a *Builder as the first
parameter. context.Context is instead the first parameter on
those functions.

Change-Id: I5f058d6a99a1e96fe2025f2e8ce30a033d12e935
Reviewed-on: https://go-review.googlesource.com/c/go/+/248321
Run-TryBot: Michael Matloob <matloob@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2020-08-17 17:26:57 +00:00
Michael Matloob
023d497385 cmd/go: add trace events for each action
This change adds a trace event for each action and also
annotates each of the action execution goroutines with trace.Goroutine
so that the actions eaxecuted by each goroutine appear on different threads in
the chrome trace viewer.

Updates #38714

Change-Id: I2e58dc5606b2e3f7f87076a61e1cc6a2014255c5
Reviewed-on: https://go-review.googlesource.com/c/go/+/248320
Run-TryBot: Michael Matloob <matloob@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2020-08-17 17:26:39 +00:00
Michael Matloob
49003da6d4 cmd/go/internal/trace: add function to distinguish goroutines
trace.StartGoroutine will associate the trace information on the context
with a new chrome profiler thread id. The chrome profiler doesn't
expect multiple trace events to have the same thread id, so this
will allow us to display concurrent events on the trace.

Updates #38714

Change-Id: I888b0cce15a5a01db66366716fdd85bf86c832cd
Reviewed-on: https://go-review.googlesource.com/c/go/+/248319
Run-TryBot: Michael Matloob <matloob@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2020-08-17 17:09:36 +00:00
Carlos Alexandro Becker
abfeec5eb0 testing/iotest: add ErrReader
Adds an io.Reader that always returns 0 and a non-nil error.

Fixes #38781

Change-Id: I56bd124de07bc8809e77c6cfaab33a1e32cfe2ee
GitHub-Last-Rev: 4e232b17e9
GitHub-Pull-Request: golang/go#34741
Reviewed-on: https://go-review.googlesource.com/c/go/+/199501
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
2020-08-17 16:39:51 +00:00
Cherry Zhang
a2a2237ae0 cmd/link: emit correct jump instruction on ARM for DYNIMPORT
On ARM, for a JMP/CALL relocation, the instruction bytes is
encoded in Reloc.Add (issue #19811). I really hate it, but before
it is fixed we have to follow the rule and emit the right bits
from r.Add.

Fixes #40769.

Change-Id: I862e105408d344c5cc58ca9140d2e552e4364453
Reviewed-on: https://go-review.googlesource.com/c/go/+/248399
Reviewed-by: Jeremy Faller <jeremy@golang.org>
Reviewed-by: Joel Sing <joel@sing.id.au>
Reviewed-by: Than McIntosh <thanm@google.com>
2020-08-17 14:55:08 +00:00
Cherry Zhang
7ee2622443 cmd/link: link dynamic library automatically
cgo_import_dynamic pragma indicates a symbol is imported from a
dynamic library. Currently, the linker does not actually link
against the dynamic library, so we have to "force" it by using

//go:cgo_import_dynamic _ _ "dylib"

syntax, which links in the library unconditionally.

This CL changes it to link in the library automatically when a
symbol is imported from the library, without using the "force"
syntax. (The "force" syntax is still supported.)

Remove the unconditional imports in the runtime. Now,
Security.framework and CoreFoundation.framework are only linked
when the x509 package is imported (or otherwise specified).

Fixes #40727.

Change-Id: Ied36b1f621cdcc5dc4a8f497cdf1c554a182d0e0
Reviewed-on: https://go-review.googlesource.com/c/go/+/248333
Run-TryBot: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-08-17 14:50:17 +00:00
Austin Clements
a22ec6e650 Revert "cmd/internal/obj: fix inline marker issue on s390x"
This reverts CL 247697.

Reason for revert: This change broke the linux-arm builder.

Change-Id: I8ca0d5b3b2ea0109ffbfadeab1406a1b60e7d18d
Reviewed-on: https://go-review.googlesource.com/c/go/+/248718
Reviewed-by: Michael Munday <mike.munday@ibm.com>
Run-TryBot: Michael Munday <mike.munday@ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-08-17 14:44:28 +00:00
Austin Clements
d19fedd180 runtime: move checkmarks to a separate bitmap
Currently, the GC stores the object marks for checkmarks mode in the
heap bitmap using a rather complex encoding: for one word objects, the
checkmark is stored in the pointer/scalar bit since one word objects
must be pointers; for larger objects, the checkmark is stored in what
would be the scan/dead bit for the second word of the object. This
encoding made more sense when the runtime used the first scan/dead bit
as the regular mark bit, but we moved away from that long ago.

This encoding and overloading of the heap bitmap bits causes a great
deal of complexity in many parts of the allocator and garbage
collector and leads to some subtle bugs like #15903.

This CL moves the checkmarks mark bits into their own per-arena bitmap
and reclaims the second scan/dead bit as a regular scan/dead bit.

I tested this by enabling doubleCheck mode in heapBitsSetType and
running in both regular and GODEBUG=gccheckmark=1 mode.

Fixes #15903.

No performance degradation. (Very slight improvement on a few
benchmarks, but it's probably just noise.)

name                                old time/op            new time/op            delta
BiogoIgor                                      16.6s ± 1%             16.4s ± 1%  -0.94%  (p=0.000 n=25+24)
BiogoKrishna                                   19.2s ± 3%             19.2s ± 3%    ~     (p=0.638 n=23+25)
BleveIndexBatch100                             6.12s ± 5%             6.17s ± 4%    ~     (p=0.170 n=25+25)
CompileTemplate                                206ms ± 1%             205ms ± 1%  -0.43%  (p=0.005 n=24+24)
CompileUnicode                                82.2ms ± 2%            81.5ms ± 2%  -0.95%  (p=0.001 n=22+22)
CompileGoTypes                                 755ms ± 3%             754ms ± 4%    ~     (p=0.715 n=25+25)
CompileCompiler                                3.73s ± 1%             3.73s ± 1%    ~     (p=0.445 n=25+24)
CompileSSA                                     8.67s ± 1%             8.66s ± 1%    ~     (p=0.836 n=24+22)
CompileFlate                                   134ms ± 2%             133ms ± 1%  -0.66%  (p=0.001 n=24+23)
CompileGoParser                                164ms ± 1%             163ms ± 1%  -0.85%  (p=0.000 n=24+24)
CompileReflect                                 466ms ± 5%             466ms ± 3%    ~     (p=0.863 n=25+25)
CompileTar                                     182ms ± 1%             182ms ± 1%  -0.31%  (p=0.048 n=24+24)
CompileXML                                     249ms ± 1%             248ms ± 1%  -0.32%  (p=0.031 n=21+25)
CompileStdCmd                                  10.3s ± 1%             10.3s ± 1%    ~     (p=0.459 n=23+23)
FoglemanFauxGLRenderRotateBoat                 8.66s ± 1%             8.62s ± 1%  -0.47%  (p=0.000 n=23+24)
FoglemanPathTraceRenderGopherIter1             20.3s ± 3%             20.2s ± 2%    ~     (p=0.893 n=25+25)
GopherLuaKNucleotide                           29.7s ± 1%             29.8s ± 2%    ~     (p=0.421 n=24+25)
MarkdownRenderXHTML                            246ms ± 1%             247ms ± 1%    ~     (p=0.558 n=25+24)
Tile38WithinCircle100kmRequest                 779µs ± 4%             779µs ± 3%    ~     (p=0.954 n=25+25)
Tile38IntersectsCircle100kmRequest            1.02ms ± 3%            1.01ms ± 4%    ~     (p=0.658 n=25+25)
Tile38KNearestLimit100Request                  984µs ± 4%             986µs ± 4%    ~     (p=0.627 n=24+25)
[Geo mean]                                     552ms                  551ms       -0.19%

https://perf.golang.org/search?q=upload:20200723.6

Change-Id: Ic703f26a83fb034941dc6f4788fc997d56890dec
Reviewed-on: https://go-review.googlesource.com/c/go/+/244539
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Martin Möhrmann <moehrmann@google.com>
2020-08-17 14:31:20 +00:00
Austin Clements
7148abc1b9 runtime: simplify heapBitsSetType doubleCheck
The heapBitsSetType function has a slow doubleCheck debugging mode
that checks the bitmap written out by the rest of the function using
far more obvious logic. But even this has some surprisingly complex
logic in it. Simplify it a bit. This also happens to fix the logic on
32-bit.

Fixes #40335.

Change-Id: I5cee482ad8adbd01cf5b98e35a270fe941ba4940
Reviewed-on: https://go-review.googlesource.com/c/go/+/244538
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
2020-08-17 13:20:35 +00:00
Austin Clements
7bbd5ca5a6 runtime: replace index and contains with bytealg calls
The runtime has its own implementation of string indexing. To reduce
code duplication and cognitive load, replace this with calls to the
internal/bytealg package. We can't do this on Plan 9 because it needs
string indexing in a note handler (which isn't allowed to use the
optimized bytealg version because it uses SSE), so we can't just
eliminate the index function, but this CL does down-scope it so make
it clear it's only for note handlers on Plan 9.

Change-Id: Ie1a142678262048515c481e8c26313b80c5875df
Reviewed-on: https://go-review.googlesource.com/c/go/+/244537
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
2020-08-17 13:20:03 +00:00
Tobias Klauser
dc12d5b0f5 all: add empty line between copyright header and package clause
Makes sure the copyright notice is not interpreted as the package level
godoc.

Change-Id: I2afce7c9d620f19d51ec1438b1d0db1774b57146
Reviewed-on: https://go-review.googlesource.com/c/go/+/248760
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Dave Cheney <dave@cheney.net>
2020-08-17 09:45:44 +00:00
Cholerae Hu
bf512685fe syscall: cap RLIMIT_NOFILE soft limit in TestRlimit on darwin
On some machines, kern.maxfilesperproc is 4096. If Rlimit.Cur is larger
than that, Setrlimit will get an errEINVAL.

Fixes #40564.

Change-Id: Ib94303c790a489ff0559c88d41a021e514d18f8d
Reviewed-on: https://go-review.googlesource.com/c/go/+/246658
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-08-17 09:14:51 +00:00
Tobias Klauser
d79350bac7 runtime: use hw.ncpuonline sysctl in getncpu on netbsd
Since NetBSD 7, hw.ncpuonline reports the number of CPUs online, while
hw.cpu reports the number of CPUs configured. Try hw.cpuonline first and
fall back to hw.ncpu in case it fails (which is the case on NetBSD
before 7.0).

This follows the behavior on OpenBSD (see CL 161757). Also, Go
in pkgsrc is patched to use hw.cpuonline, so this CL would allow said
patch to be dropped.

Updates #30824

Change-Id: Id1c19dff2c1e4401e6074179fae7c708ba0e3098
Reviewed-on: https://go-review.googlesource.com/c/go/+/231957
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Benny Siegert <bsiegert@gmail.com>
2020-08-17 09:12:50 +00:00
Joel Sing
9138a2a67f cmd/link: avoid duplicate DT_NEEDED entries
When adding a new library entry, ensure we record it as seen to avoid
adding duplicates of it.

Fixes #39256

Change-Id: Id309adf80c533d78fd485517c18bc9ab5f1d29fb
Reviewed-on: https://go-review.googlesource.com/c/go/+/235257
Run-TryBot: Joel Sing <joel@sing.id.au>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2020-08-17 09:02:52 +00:00
zero.xu
681559e1f1 runtime: update comment: modTimer is called by Timer.Reset
Change-Id: I97d0d1343d41b603a68388e496411fb040dc6d66
GitHub-Last-Rev: d11177ad24
GitHub-Pull-Request: golang/go#38625
Reviewed-on: https://go-review.googlesource.com/c/go/+/229767
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
2020-08-17 07:15:50 +00:00
Martin Möhrmann
f979d072d3 runtime: avoid memclr call for keys in mapdelete_fast
Replace memclrHasPointers calls for keys in mapdelete_fast*
functions with direct writes since the key sizes are known
at compile time.

name                     old time/op  new time/op  delta
MapDelete/Pointer/100    33.7ns ± 1%  23.7ns ± 2%  -29.68%  (p=0.000 n=7+9)
MapDelete/Pointer/1000   41.6ns ± 5%  34.9ns ± 4%  -16.01%  (p=0.000 n=9+10)
MapDelete/Pointer/10000  45.6ns ± 1%  38.2ns ± 2%  -16.34%  (p=0.000 n=8+10)

Change-Id: Icaac43b520b93c2cf9fd192b822fae7203a7bbf7
Reviewed-on: https://go-review.googlesource.com/c/go/+/231737
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2020-08-17 04:56:56 +00:00
Martin Möhrmann
99f179f55a fmt: avoid badverb formatting for %q when used with integers
Instead of returning a bad verb error format for runes above
utf8.Maxrune return a quoted utf8.RuneError rune (\ufffd).
This makes the behaviour consistent with the "c" verb and
aligns behaviour to not return bad verb error format when
a verb is applied to the correct argument type.

Fixes #14569

Change-Id: I679485f6bb90ebe408423ab68af16cce38816cd0
Reviewed-on: https://go-review.googlesource.com/c/go/+/248759
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
2020-08-17 04:55:28 +00:00
Polina Osadcha
51ac0f0f4c strings: optimize Replace by using a strings.Builder
name        old time/op    new time/op    delta
ReplaceAll     162ns ±26%     134ns ±26%  -17.44%  (p=0.014 n=10+10)

name        old alloc/op   new alloc/op   delta
ReplaceAll     32.0B ± 0%     16.0B ± 0%  -50.00%  (p=0.000 n=10+10)

name        old allocs/op  new allocs/op  delta
ReplaceAll      2.00 ± 0%      1.00 ± 0%  -50.00%  (p=0.000 n=10+10)

Change-Id: Ia8377141d3adb84c7bd94e511ac8f739915aeb40
Reviewed-on: https://go-review.googlesource.com/c/go/+/245197
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2020-08-17 04:08:35 +00:00
Polina Osadcha
6f99b33c18 all: replace Replace(..., -1) with ReplaceAll(...)
Change-Id: I8f7cff7a83a9c50bfa3331e8b40e4a6c2e1c0eee
Reviewed-on: https://go-review.googlesource.com/c/go/+/245198
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2020-08-17 04:07:23 +00:00
Nigel Tao
f7fc25ed5a image/gif: add more writer benchmarks
The two existing benchmarks encode randomized pixels, which isn't very
representative. The two new benchmarks encode a PNG photo as a GIF.

Also rename the benchmarks for consistency.

Also fix the bytes-per-op measure for paletted images, which are 1 (not
4) bytes per pixel.

Also simplify BenchmarkEncodeRandomPaletted (formerly just called
BenchmarkEncode). It doesn't need to generate a random palette (and the
GIF encoder largely doesn't care about the palette's RGBA values).
Use palette.Plan9 instead, a pre-existing 256-element color palette.

Change-Id: I10a6ea4e9590bb0d9f76e8cc0f4a88d43b1d650d
Reviewed-on: https://go-review.googlesource.com/c/go/+/248218
Reviewed-by: David Symonds <dsymonds@golang.org>
2020-08-17 00:08:54 +00:00
Chirag Sukhala
c810c6db10 doc/articles/wiki: add missing log import to net/http tutorial
The log package is used with the net/http but was not in the import clause.

Change-Id: Ic45b987633adf0ee15defd4d136b5d37027e22b0
GitHub-Last-Rev: e74aff5337
GitHub-Pull-Request: golang/go#36674
Reviewed-on: https://go-review.googlesource.com/c/go/+/215618
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
2020-08-16 21:51:36 +00:00
Keith Randall
8c39bbf9c9 cmd/compile: stop race instrumentation from clobbering frame pointer
There is an optimization rule that removes calls to racefuncenter and
racefuncexit, if there are no other race calls in the function. The
rule removes the call to racefuncenter, but it does *not* remove the
store of its argument to the outargs section of the frame. If the
outargs section is now size 0 (because the calls to racefuncenter/exit
were the only calls), then that argument store clobbers the frame
pointer instead.

The fix is to remove the argument store when removing the call to
racefuncenter.  (Racefuncexit doesn't have an argument.)

Change-Id: I183ec4d92bbb4920200e1be27b7b8f66b89a2a0a
Reviewed-on: https://go-review.googlesource.com/c/go/+/248262
Reviewed-by: Robert Griesemer <gri@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-08-16 17:05:44 +00:00
Keith Randall
01f99b4e95 cmd/compile: mark DUFFZERO/DUFFCOPY as async unsafe
These operations are async unsafe on architectures that use
frame pointers.

The reason is they rely on data being safe when stored below the stack
pointer. They do:

  45da69:       48 89 6c 24 f0          mov    %rbp,-0x10(%rsp)
  45da6e:       48 8d 6c 24 f0          lea    -0x10(%rsp),%rbp
  45da73:       e8 7d d0 ff ff          callq  45aaf5 <runtime.duffzero+0x115>
  45da78:       48 8b 6d 00             mov    0x0(%rbp),%rbp

This dance ensures that inside duffzero, it looks like there is a
proper frame pointer set up, so that stack walkbacks work correctly if
the kernel samples during duffzero.

However, this instruction sequence depends on data not being clobbered
even though it is below the stack pointer.

If there is an async interrupt at any of those last 3 instructions,
and the interrupt decides to insert a call to asyncPreempt, then the
saved frame pointer on the stack gets clobbered. The last instruction
above then restores junk to the frame pointer.

To prevent this, mark these instructions as async unsafe.

(The body of duffzero is already async unsafe, as it is in package runtime.)

Change-Id: I5562e82f9f5bd2fb543dcf2b6b9133d87ff83032
Reviewed-on: https://go-review.googlesource.com/c/go/+/248261
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Martin Möhrmann <moehrmann@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2020-08-16 17:05:28 +00:00
Keith Randall
c6a11f0dd2 crypto,internal/bytealg: fix assembly that clobbers BP
BP should be callee-save. It will be saved automatically if
there is a nonzero frame size. Otherwise, we need to avoid this register.

Change-Id: If3f551efa42d830c8793d9f0183cb8daad7a2ab5
Reviewed-on: https://go-review.googlesource.com/c/go/+/248260
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Martin Möhrmann <moehrmann@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-08-16 17:05:18 +00:00
Joel Sing
d303630622 syscall: support rawVforkSyscall on linux/riscv64
Updates #31936

Change-Id: I7dcb8987d4c306ccc97704b9c1b12313ba8bf242
Reviewed-on: https://go-review.googlesource.com/c/go/+/234960
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-08-16 14:23:50 +00:00
Joel Sing
cf9b4f63a5 runtime: use riscv64 RDTIME instruction
Use the actual RDTIME instruction, rather than a WORD.
Generated code is the same.

Change-Id: I6f6f5a1836eae2d05af34d4a22db2ede4fdcb458
Reviewed-on: https://go-review.googlesource.com/c/go/+/231997
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-08-16 13:55:00 +00:00
Agniva De Sarker
b6ad288032 net/http: avoid setting body when NoBody is set for js/wasm
When http.NoBody is set, it is equivalent to Body being zero bytes.
We therefore set the body only if it is of length greater than 0.

Manually verified with wasmbrowsertest.

Fixes #36339

Change-Id: I9c108c38f99409f72ea101819af572429505a8ad
Reviewed-on: https://go-review.googlesource.com/c/go/+/237758
Run-TryBot: Agniva De Sarker <agniva.quicksilver@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Johan Brandhorst <johan.brandhorst@gmail.com>
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
2020-08-15 15:29:33 +00:00
Alberto Donizetti
ccc951637b cmd/link: move comma outside quotes
Change-Id: I2ecf8976a6289924ac7bfe7ace129a462537e11d
Reviewed-on: https://go-review.googlesource.com/c/go/+/248339
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
Reviewed-by: Than McIntosh <thanm@google.com>
2020-08-15 08:24:23 +00:00
Jason A. Donenfeld
c0dded04f7 runtime: do not explicitly exit on ctrl handler
The default ctrl+c handler should process exits in situations where it
makes sense, like console apps, but not in situations where it doesn't,
like libraries or services. Therefore, we should remove the exit(2) so
that the default handler is used for this. This also uses the more
proper windows exit code of STATUS_CONTROL_C_EXIT, with the base case
handler installed by KernelBase.dll. In particular, this helps in the
case of services, which previously would terminate when receiving
shutdown signals, instead of passing them onward to the service program.
In this CL, contrary to CL 244959, we do not need to special case
services with expensive detection algorithms, or rely on hard-coded
library/archive flags.

Fixes #40167.
Fixes #40074.

Change-Id: I9bf6ed6f65cefeff754d270aa33fa4df8d0b451f
Reviewed-on: https://go-review.googlesource.com/c/go/+/243597
Run-TryBot: Jason A. Donenfeld <Jason@zx2c4.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
Reviewed-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-08-15 05:58:24 +00:00
Matthew Dempsky
69d34e2c69 test: bump array size in fixedbugs/issue39292.go
The previous array length was large enough to exceed
maxImplicitStackSize on 64-bit architectures, but not on 32-bit
architectures.

Fixes #40808.

Change-Id: I69e9abb447454b2e7875ba503a0cb772e965ae31
Reviewed-on: https://go-review.googlesource.com/c/go/+/248680
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-08-15 04:45:34 +00:00
Cuong Manh Le
948d324f7d cmd/compile: add failing test case for #24305
Updates #24305

Change-Id: Ib0b093e33004a978467cdd1e77186798392d4eca
Reviewed-on: https://go-review.googlesource.com/c/go/+/248217
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2020-08-15 03:09:52 +00:00
Cuong Manh Le
82c45eb681 cmd/compile: handle OCLOSURE/OCALLPART in mustHeapAlloc check
Currently, generated struct wrapper for closure is not handled in
mustHeapAlloc. That causes compiler crashes when the wrapper struct
is too large for stack, and must be heap allocated instead.

Fixes #39292

Change-Id: I14c1e591681d9d92317bb2396d6cf5207aa93e08
Reviewed-on: https://go-review.googlesource.com/c/go/+/244917
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2020-08-15 03:09:35 +00:00
Cuong Manh Le
0031fa80a3 cmd/compile: another fix initializing blank fields in struct literal
CL 230121 fixed the bug that struct literal blank fields type array/struct
can not be initialized. But it still misses some cases when an expression
causes "candiscard(value)" return false. When these happen, we recursively
call fixedlit with "var_" set to "_", and hit the bug again.

To fix it, just making splitnode return "nblank" whenever "var_" is "nblank".

Fixes #38905

Change-Id: I281941b388acbd551a4d8ca1a235477f8d26fb6e
Reviewed-on: https://go-review.googlesource.com/c/go/+/232617
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2020-08-15 03:09:21 +00:00
kakulisen
441b52f566 math: simplify the code
Simplifying some code without compromising performance.
My CPU is Intel Xeon Gold 6161, 2.20GHz, 64-bit operating system.
The memory is 8GB. This is my test environment, I hope to help you judge.

Benchmark:

name      old time/op    new time/op    delta
Log1p-4    21.8ns ± 5%    21.8ns ± 4%   ~     (p=0.973 n=20+20)

Change-Id: Icd8f96f1325b00007602d114300b92d4c57de409
Reviewed-on: https://go-review.googlesource.com/c/go/+/233940
Reviewed-by: Robert Griesemer <gri@golang.org>
2020-08-15 02:20:42 +00:00
Ian Lance Taylor
12d40adac4 test: add test for conversion of untyped bool to interface
gccgo miscompiled this case.

Updates #40152

Change-Id: I8448c155e802e39d8fc7cda4930ce62cb6363ce5
Reviewed-on: https://go-review.googlesource.com/c/go/+/242000
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2020-08-15 01:43:18 +00:00
Ian Lance Taylor
6072d6ee3e test: add a test case that gccgo fails to compile
Change-Id: If36394e059cdae49834d26ad4ffdd3092a72a0b8
Reviewed-on: https://go-review.googlesource.com/c/go/+/241997
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2020-08-15 01:42:57 +00:00
Ian Lance Taylor
f71444955a test: add test case that caused gccgo undefined symbol reference
For #40252

Change-Id: Ie23d2789ca9b4b9081adb39ab64c80c412ad58ce
Reviewed-on: https://go-review.googlesource.com/c/go/+/248637
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-08-15 00:23:28 +00:00
Gaurav Singh
5a18e0b58c sync: fix goroutine leak for when TestMutexFairness times out
If the timeout triggers before writing to the done channel, the
goroutine will be blocked waiting for a corresponding read that’s
no longer existent, thus a goroutine leak. This change fixes that by
using a buffered channel instead.

Change-Id: I9cf4067a58bc5a729ab31e4426edd78bd359e8e0
GitHub-Last-Rev: a7d811a7be
GitHub-Pull-Request: golang/go#40236
Reviewed-on: https://go-review.googlesource.com/c/go/+/242902
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-08-14 23:04:16 +00:00
lufia
24ff2af65e cmd/dist: fix typo
Change-Id: Ib5d7f3eadff03070043d52659af4312ee293c586
Reviewed-on: https://go-review.googlesource.com/c/go/+/244817
Reviewed-by: Alberto Donizetti <alb.donizetti@gmail.com>
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-08-14 22:59:32 +00:00
Alexander Klauer
407bf0ca67 reflect: add parentheses to properly bind <- in ChanOf’s string
Adds parentheses so as to properly bind <- to the right most
channel.
This meant that previously given:

   ChanOf(<-chan T)

it would mistakenly try to look up the type as

    chan <-chan T

instead of

    chan (<-chan T)

Fixes #39897

Change-Id: I8564916055f5fadde3382e41fe8820a1071e5f13
GitHub-Last-Rev: f8f2abe8d4
GitHub-Pull-Request: golang/go#39898
Reviewed-on: https://go-review.googlesource.com/c/go/+/240280
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-08-14 22:58:36 +00:00
Keith Randall
32a84c99e1 cmd/compile: fix live variable computation for deferreturn
Taking the live variable set from the last return point is problematic.
See #40629 for details, but there may not be a return point, or it may
be before the final defer.

Additionally, keeping track of the last call as a *Value doesn't quite
work. If it is dead-code eliminated, the storage for the Value is reused
for some other random instruction. Its live variable information,
if it is available at all, is wrong.

Instead, just mark all the open-defer argument slots as live
throughout the function. (They are already zero-initialized.)

Fixes #40629

Change-Id: Ie456c7db3082d0de57eaa5234a0f32525a1cce13
Reviewed-on: https://go-review.googlesource.com/c/go/+/247522
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
2020-08-14 21:49:36 +00:00
Jay Conrod
02a7b4b4a7 cmd/go/internal/modload: don't initialize build cache
modload.Init initialized the build cache with the intent of providing
a better error message in Go 1.12, when the build cache became
mandatory (in module mode, packages aren't installed outside the build
cache). Unfortunately, this didn't provide a more descriptive error
(the cache calls base.Fatalf with its own message), and it caused
errors for commands that don't use the cache (like 'go mod edit').

This CL removes the cache initialization from modload.Init. The
builder will initialize it when it's needed.

For #39882

Change-Id: Ibc01ae4e59358dcd08a07ffc97bf556514d0366f
Reviewed-on: https://go-review.googlesource.com/c/go/+/240548
Run-TryBot: Jay Conrod <jayconrod@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Michael Matloob <matloob@golang.org>
2020-08-14 21:04:58 +00:00
Jay Conrod
8766f96dd7 cmd/go: migrate to module.MatchPrefixPatterns
In CL 239797, str.GlobsMatchPath was copied to golang.org/x/mod/module
as MatchPrefixPatterns. This CL updates x/mod, switches calls to use
the new function, and deletes the old function.

For #38725

Change-Id: I7241032228b574aa539426a92d2f5aad9ee001e2
Reviewed-on: https://go-review.googlesource.com/c/go/+/240061
Run-TryBot: Jay Conrod <jayconrod@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Michael Matloob <matloob@golang.org>
2020-08-14 21:04:33 +00:00