Use the auxiliary symbol mechanism to connect the text symbol and
its associated DWARF symbols. This way, the linker can track the
DWARF symbols from the text symbol, without looking up special
names.

Currently, in the linker this is only used in the deadcode pass
to track which DWARF symbols are used and need to load. Later
passes still use name lookup for now.

Change-Id: I2fe49f3b1f0ecc1472ae8aa93907cff740022d8d
Reviewed-on: https://go-review.googlesource.com/c/go/+/199801
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>

With the new object files, now we can run the deadcode pass on
indices instead of Symbol structs, so we can delay creating
Symbols after the deadcode pass. Then we only need to create
reachable symbols.

Not create Symbols in LoadNew and LoadRefs, and recombine
LoadReloc into LoadFull.

Split loadcgo into two parts: the first finds root symbols, the
second create Symbols and sets attributes. The first runs before
the deadcode pass, while the second runs after.

TODO: currently there are still symbols that are not marked
reachable but still used. This includes DWARF symbols, file
symbols, and type symbols that are referenced by DWARF symbols.
We still need to create them (conservatively).

Change-Id: I695779c9312be9d49ab1683957ac3e72e1f65a1e
Reviewed-on: https://go-review.googlesource.com/c/go/+/199643
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>

The old code does this. Do the same.

Change-Id: Ibf32ac347d6425e19ad0bc664c6b43ab5eba9c5e
Reviewed-on: https://go-review.googlesource.com/c/go/+/201022
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>

In CL 196030 we decided to combine the imported package list
(Autolib) and referenced package list (PkgIdx, or Pkglist).
However, in some cases the Autolib list may contain file name,
instead of package path, e.g.
https://go.googlesource.com/go/+/refs/heads/dev.link/src/cmd/compile/internal/gc/main.go#1181
And the linker needs that to locate the file. This mostly happens
with direct invocation of the compiler and linker (i.e., not
through "go build").

Instead of letting the linker make guess of the file name based
on the package path, make Autolib a separate list.

Change-Id: If195a69462d04db515346ee67cdec925f5a69e2e
Reviewed-on: https://go-review.googlesource.com/c/go/+/200157
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Jeremy Faller <jeremy@golang.org>

On AIX, a TOC symbol always has a relocation to its target symbol.
Instead of using name lookup to locate the target symbol, we can
just use the relocation.

Using name lookup, besides being less efficient, needs to provide
the right symbol version. In this particular case, we are looking
for a data symbol so it is almost always version 0. But in case
that it is a text symbol, we may get an ABIALIAS symbol, which
does not have its Sect set.

Change-Id: I1ecfd284b04a86bbbc450059ee89d99d40493e51
Reviewed-on: https://go-review.googlesource.com/c/go/+/201019Reviewed-by: Than McIntosh <thanm@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

On AIX, TOC symbols may be created and added to ctxt.Data
concurrently. To ensure reproducible builds, sort ctxt.Data.
This implements the same logic as WriteObjFile does for old
object files.

Change-Id: I2e6e2d7755352848981544a4fb68b828a188c2ca
Reviewed-on: https://go-review.googlesource.com/c/go/+/201021
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>

When reflect.Type.Method is called, all exported methods from a
reachable type need to be conservatively live. When such a
function is called, the compiler sets an attribute to the
function, and the linker needs to check that attribute. Implement
this in the index-based deadcode pass.

Unify symbol flags and FuncInfo flags to make things simpler. In
particular, the deadcode pass can check the reflectMethod
attribute without reading in and decoding FuncInfo.

Change-Id: Ibb21e172f2996e899c6efa5551a29d0eca62df67
Reviewed-on: https://go-review.googlesource.com/c/go/+/200099
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>

This essentially replicates the logic of live method tracking and
type symbol decoding, rewritten to operate on indices instead of
Symbols.

TODO: the special handling of reflect.Type.Method has not been
implemented.

TODO: the symbol name is used too much. It ought to be a better
way to do it.

Change-Id: I860ee7a506c00833902e4870d15aea698a705dd9
Reviewed-on: https://go-review.googlesource.com/c/go/+/199078Reviewed-by: Than McIntosh <thanm@google.com>

Change-Id: I823b19c0742992dd760c6372428a1936bb7c7e70
Reviewed-on: https://go-review.googlesource.com/c/go/+/200768Reviewed-by: Jeremy Faller <jeremy@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Clean merge.

Change-Id: If9bfb0f27f41563fd5d386de9c1081542c3ce498

We couldn't do this before because sighandler was compiled for nacl.

Updates #30439

Change-Id: Ieec9938b6a1796c48d251cd8b1db1a42c25f3943
Reviewed-on: https://go-review.googlesource.com/c/go/+/200739
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

NextPart has automatic handling of quoted-printable encoding,
which is sometimes undesirable. NextRawPart adds a method
for reading a part while bypassing such automatic handling.

Fixes #29090

Change-Id: I6a042a4077c64091efa3f5dbecce0d9a34ac7065
Reviewed-on: https://go-review.googlesource.com/c/go/+/152877
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

RFC 5322 date format allows CFWS after the timezone.
If CFWS is valid, it is discarded and parsing is done as before
using time.Parse().
Existing test is extended with limit cases and invalid strings.

Fixes #22661

Change-Id: I54b96d7bc384b751962a76690e7e4786217a7941
Reviewed-on: https://go-review.googlesource.com/c/go/+/117596
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

This makes Decoder.offset public while renaming it to
Decoder.InputOffset to match encoding/xml Decoder API

Code changes made by Adam Stankiewicz [sheerun@sher.pl]

Fixes #29688

Change-Id: I86dbfd2b2da80160846e92bfa580c53d8d45e2db
Reviewed-on: https://go-review.googlesource.com/c/go/+/200677
Run-TryBot: Johan Brandhorst <johan.brandhorst@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Avoid an out-of-range error when calling LongString on a generic
block.

Change-Id: I33ca88940d899bc71e3155bc63d2aa925cf83230
Reviewed-on: https://go-review.googlesource.com/c/go/+/200737
Run-TryBot: Michael Munday <mike.munday@ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>

Update the new deadcode pass to use the revised loader interface
for querying relocations. Remove some of the previous loader relocation
methods, since they are no longer used.

Change-Id: I08cec4c05793a17698b2674068f64837a5bf4477
Reviewed-on: https://go-review.googlesource.com/c/go/+/200718Reviewed-by: Cherry Zhang <cherryyz@google.com>

Second change of several to update the loader API to reflect the final
consensus version of the loader API as described in Cherry's doc.
This piece:

 - define new loader.Relocs() method that returns a struct
   encapsulating a set of relocations on a global symbol

Old way of examining relocations:

  nreloc := loader.NReloc(someGlobalSymbolIndex)
  for i := 0; i < nreloc; i++ {
    tgtIdx := loader.RelocSym(someGlobalSymbolIndex, i))
    ... <do something with tgtIdx>
  }

New way of examining relocations:

  relocs := d.loader.Relocs(someGlobalSymbolIndex)
  for i := 0; i < relocs.Count; i++ {
    r := relocs.At(i).Sym
    ... <do something with r.Sym>
  }

Change-Id: I5bead1d729655ea13b3396647e53aafcd3e60f97
Reviewed-on: https://go-review.googlesource.com/c/go/+/200717
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>

Increases the exec timeout from 5sec to 1min, but
also print out the error value on any test failure.

Fixes #34836

Change-Id: Ida2b8bd460243491ef0f90dfe0f978dfe02a0703
Reviewed-on: https://go-review.googlesource.com/c/go/+/200519
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>

We should keep a consistent way of formatting errors
in this file.

Fixes #34848

Change-Id: Ibb75908504f381fccab0281a42e788ef8c716b6f
Reviewed-on: https://go-review.googlesource.com/c/go/+/200679
Run-TryBot: Johan Brandhorst <johan.brandhorst@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>

Fixes #34846
Change-Id: I24b3e65fc96ec85b2821480e9396c9d1663611c4
Reviewed-on: https://go-review.googlesource.com/c/go/+/200678
Run-TryBot: Johan Brandhorst <johan.brandhorst@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Johan Brandhorst <johan.brandhorst@gmail.com>

Fixes #34847

Change-Id: Ibb58c8820cdab8b9f3755fcfba754ad0c9ca982f
Reviewed-on: https://go-review.googlesource.com/c/go/+/200657
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Elias Naur <mail@eliasnaur.com>

Coalesce set/get pairs into a tee.

Change-Id: I88ccdcb148465615437bebf24145e941a037e0a5
Reviewed-on: https://go-review.googlesource.com/c/go/+/200357
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Richard Musiol <neelance@gmail.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>

Part 1: CL 199499 (GOOS nacl)
Part 2: CL 200077 (amd64p32 files, toolchain)
Part 3: stuff that arguably should've been part of Part 2, but I forgot
        one of my grep patterns when splitting the original CL up into
        two parts.

This one might also have interesting stuff to resurrect for any future
x32 ABI support.

Updates #30439

Change-Id: I2b4143374a253a003666f3c69e776b7e456bdb9c
Reviewed-on: https://go-review.googlesource.com/c/go/+/200318
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

The package references recorded in the object file, which are
obtained from the compiler, are escaped. We should also use the
escaped package paths in the linker for resolving package
references.

Change-Id: I42eb12df6ff24330e6dc7bed1dc8224bb3b8a106
Reviewed-on: https://go-review.googlesource.com/c/go/+/200158
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>

This is the behavior of the old code. Do the same.

Change-Id: I3d393d754dcbdb7e76a577252a94214d2e316651
Reviewed-on: https://go-review.googlesource.com/c/go/+/200159
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>

When the compiler's -S flag is specified, it dumps the
disassembly. Add this when writing the new style object file.

Change-Id: I4cf85e57d22d0ceea1fda6d3b59fe363573659e7
Reviewed-on: https://go-review.googlesource.com/c/go/+/200100
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>

Switch the deadcode pass to use indices instead of Symbol
structures when using new object file format. Delay loading
symbol relocations and contents fully after the deadcode pass.
The next step is not to create Symbol structures until deadcode
is done.

Method tracking logic hasn't been implemented. Currently, all
methods of a reachable type are live.

Change-Id: Iffcd06ff84e6e52bd9eb24d1220d94234d18ab6b
Reviewed-on: https://go-review.googlesource.com/c/go/+/198199
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>

Fixes #34768

Change-Id: Ic73591f620cdee5bc7203483902e6ba98d2c442b
Reviewed-on: https://go-review.googlesource.com/c/go/+/200438Reviewed-by: Bryan C. Mills <bcmills@google.com>

Change-Id: If5a272f331fe9da09467efedd0231a4ce34db0f8
GitHub-Last-Rev: 4b81a79a92db4b51001ce6660b24c760fd3b630b
GitHub-Pull-Request: golang/go#28420
Reviewed-on: https://go-review.googlesource.com/c/go/+/144999
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rick Hudson <rlh@golang.org>

First change of several to update the loader API to reflect the final
consensus version of the loader API as described in Cherry's doc.

This piece:

 - define new loader.Sym type to encapsulate a global symbol
   index (as opposed to just using 'int')

Change-Id: I6f6483e269f80abfc7d373b2856b2c0d61b9ac24
Reviewed-on: https://go-review.googlesource.com/c/go/+/200417
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Jeremy Faller <jeremy@golang.org>

Also, in cmd/doc, avoid calling 'go list -m all' when in module mode
outside a module since it's now an error.

Fixes #32027

Change-Id: I7224c7fdf7e950bce6c058ab2a5837c27ba3b899
Reviewed-on: https://go-review.googlesource.com/c/go/+/200297
Run-TryBot: Jay Conrod <jayconrod@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>

Walking the progs is simpler than using the is_stmt symbol shenanigans.
This is a reinstatement of CL 196661, which was rolled back due to tests
failing. Unlike that original CL, this change should output the same
debug_lines data the original approach wrote.

The stats for JUST this CLC, note teh small speedup in compilation, and
the lack of difference in binary size.

name                      old time/op       new time/op       delta
Template                        229ms ± 4%        218ms ± 1%  -4.95%  (p=0.000 n=10+8)
Unicode                        92.6ms ± 9%       88.6ms ±13%    ~     (p=0.089 n=10+10)
GoTypes                         850ms ± 2%        831ms ± 4%  -2.23%  (p=0.009 n=10+10)
Compiler                        3.99s ± 1%        3.93s ± 1%  -1.29%  (p=0.000 n=10+9)
SSA                             13.7s ± 1%        13.7s ± 1%    ~     (p=0.912 n=10+10)
Flate                           140ms ± 3%        138ms ± 3%  -1.90%  (p=0.009 n=10+10)
GoParser                        172ms ± 2%        169ms ± 4%    ~     (p=0.095 n=9+10)
Reflect                         530ms ± 3%        516ms ± 5%    ~     (p=0.052 n=10+10)
Tar                             202ms ± 1%        196ms ± 3%  -2.83%  (p=0.002 n=9+10)
XML                             280ms ± 3%        270ms ± 4%  -3.48%  (p=0.009 n=10+10)
LinkCompiler                    927ms ± 2%        907ms ± 4%    ~     (p=0.052 n=10+10)
ExternalLinkCompiler            1.97s ± 2%        1.97s ± 3%    ~     (p=0.853 n=10+10)
LinkWithoutDebugCompiler        549ms ± 3%        543ms ± 5%    ~     (p=0.481 n=10+10)
StdCmd                          12.0s ± 1%        12.0s ± 1%    ~     (p=0.905 n=9+10)

name                      old user-time/op  new user-time/op  delta
Template                        372ms ±18%        344ms ±11%    ~     (p=0.190 n=10+10)
Unicode                         264ms ±23%        241ms ±43%    ~     (p=0.315 n=8+10)
GoTypes                         1.56s ±22%        1.68s ± 5%    ~     (p=0.237 n=10+8)
Compiler                        7.41s ± 2%        7.31s ± 3%    ~     (p=0.123 n=10+10)
SSA                             24.5s ± 2%        24.7s ± 1%    ~     (p=0.133 n=10+9)
Flate                           199ms ± 6%        188ms ±28%    ~     (p=0.353 n=10+10)
GoParser                        243ms ±11%        240ms ± 6%    ~     (p=0.968 n=10+9)
Reflect                         929ms ±21%        862ms ±35%    ~     (p=0.190 n=10+10)
Tar                             284ms ± 9%        296ms ±17%    ~     (p=0.497 n=9+10)
XML                             386ms ±21%        398ms ±28%    ~     (p=1.000 n=9+10)
LinkCompiler                    1.13s ± 9%        1.12s ± 8%    ~     (p=0.546 n=9+9)
ExternalLinkCompiler            2.37s ±15%        2.30s ± 9%    ~     (p=0.549 n=10+9)
LinkWithoutDebugCompiler        646ms ±10%        642ms ±13%    ~     (p=0.853 n=10+10)

name                      old alloc/op      new alloc/op      delta
Template                       36.5MB ± 0%       36.5MB ± 0%  -0.11%  (p=0.000 n=10+9)
Unicode                        28.5MB ± 0%       28.5MB ± 0%    ~     (p=0.190 n=10+10)
GoTypes                         121MB ± 0%        121MB ± 0%  -0.10%  (p=0.000 n=9+10)
Compiler                        549MB ± 0%        549MB ± 0%  -0.10%  (p=0.000 n=9+10)
SSA                            1.92GB ± 0%       1.92GB ± 0%  -0.13%  (p=0.000 n=10+10)
Flate                          23.0MB ± 0%       23.0MB ± 0%  -0.07%  (p=0.000 n=10+10)
GoParser                       27.9MB ± 0%       27.9MB ± 0%  -0.09%  (p=0.000 n=10+10)
Reflect                        77.9MB ± 0%       77.8MB ± 0%  -0.13%  (p=0.000 n=9+10)
Tar                            34.5MB ± 0%       34.4MB ± 0%  -0.09%  (p=0.000 n=10+10)
XML                            44.3MB ± 0%       44.3MB ± 0%  -0.08%  (p=0.000 n=10+10)
LinkCompiler                    229MB ± 0%        225MB ± 0%  -1.74%  (p=0.000 n=10+10)
ExternalLinkCompiler            233MB ± 0%        242MB ± 0%  +3.81%  (p=0.000 n=10+10)
LinkWithoutDebugCompiler        156MB ± 0%        152MB ± 0%  -2.29%  (p=0.000 n=10+9)

name                      old allocs/op     new allocs/op     delta
Template                         373k ± 0%         373k ± 0%  -0.21%  (p=0.000 n=10+10)
Unicode                          340k ± 0%         340k ± 0%  -0.04%  (p=0.000 n=10+10)
GoTypes                         1.33M ± 0%        1.33M ± 0%  -0.20%  (p=0.000 n=10+9)
Compiler                        5.39M ± 0%        5.38M ± 0%  -0.16%  (p=0.000 n=10+10)
SSA                             18.3M ± 0%        18.2M ± 0%  -0.15%  (p=0.000 n=10+10)
Flate                            235k ± 0%         234k ± 0%  -0.23%  (p=0.000 n=10+7)
GoParser                         309k ± 0%         308k ± 0%  -0.20%  (p=0.000 n=10+10)
Reflect                          970k ± 0%         968k ± 0%  -0.30%  (p=0.000 n=10+10)
Tar                              347k ± 0%         347k ± 0%  -0.22%  (p=0.000 n=10+10)
XML                              425k ± 0%         424k ± 0%  -0.16%  (p=0.000 n=10+10)
LinkCompiler                     602k ± 0%         601k ± 0%  -0.03%  (p=0.000 n=9+10)
ExternalLinkCompiler            1.65M ± 0%        1.65M ± 0%  -0.02%  (p=0.000 n=10+10)
LinkWithoutDebugCompiler         220k ± 0%         220k ± 0%  -0.03%  (p=0.016 n=10+9)

name                      old object-bytes  new object-bytes  delta
Template                        553kB ± 0%        553kB ± 0%  -0.01%  (p=0.000 n=10+10)
Unicode                         215kB ± 0%        215kB ± 0%    ~     (all equal)
GoTypes                        2.02MB ± 0%       2.02MB ± 0%  -0.00%  (p=0.000 n=10+10)
Compiler                       7.98MB ± 0%       7.98MB ± 0%  -0.01%  (p=0.000 n=10+10)
SSA                            27.1MB ± 0%       27.1MB ± 0%  -0.00%  (p=0.000 n=10+10)
Flate                           340kB ± 0%        340kB ± 0%  -0.01%  (p=0.000 n=10+10)
GoParser                        434kB ± 0%        434kB ± 0%  -0.00%  (p=0.000 n=10+10)
Reflect                        1.34MB ± 0%       1.34MB ± 0%  -0.01%  (p=0.000 n=10+10)
Tar                             479kB ± 0%        479kB ± 0%  -0.00%  (p=0.000 n=10+10)
XML                             618kB ± 0%        618kB ± 0%  -0.01%  (p=0.000 n=10+10)

name                      old export-bytes  new export-bytes  delta
Template                       20.4kB ± 0%       20.4kB ± 0%    ~     (all equal)
Unicode                        8.21kB ± 0%       8.21kB ± 0%    ~     (all equal)
GoTypes                        36.6kB ± 0%       36.6kB ± 0%    ~     (all equal)
Compiler                        116kB ± 0%        116kB ± 0%  +0.00%  (p=0.000 n=10+10)
SSA                             141kB ± 0%        141kB ± 0%  +0.00%  (p=0.000 n=10+10)
Flate                          5.10kB ± 0%       5.10kB ± 0%    ~     (all equal)
GoParser                       8.92kB ± 0%       8.92kB ± 0%    ~     (all equal)
Reflect                        11.8kB ± 0%       11.8kB ± 0%    ~     (all equal)
Tar                            10.9kB ± 0%       10.9kB ± 0%    ~     (all equal)
XML                            17.4kB ± 0%       17.4kB ± 0%    ~     (all equal)

name                      old text-bytes    new text-bytes    delta
HelloSize                       742kB ± 0%        742kB ± 0%    ~     (all equal)
CmdGoSize                      10.6MB ± 0%       10.6MB ± 0%    ~     (all equal)

name                      old data-bytes    new data-bytes    delta
HelloSize                      10.7kB ± 0%       10.7kB ± 0%    ~     (all equal)
CmdGoSize                       312kB ± 0%        312kB ± 0%    ~     (all equal)

name                      old bss-bytes     new bss-bytes     delta
HelloSize                       122kB ± 0%        122kB ± 0%    ~     (all equal)
CmdGoSize                       146kB ± 0%        146kB ± 0%    ~     (all equal)

name                      old exe-bytes     new exe-bytes     delta
HelloSize                      1.10MB ± 0%       1.10MB ± 0%    ~     (all equal)
CmdGoSize                      14.9MB ± 0%       14.9MB ± 0%  -0.03%  (p=0.000 n=10+10)

Change-Id: Ie078a42b29353b96654fa1f0f47d600b5a53762d
Reviewed-on: https://go-review.googlesource.com/c/go/+/200017Reviewed-by: Jeremy Faller <jeremy@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: Jeremy Faller <jeremy@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

When unmarshaling to a map, the map's key type must either be a string,
an integer, or implement encoding.TextUnmarshaler. But for a user
defined type, reflect.Kind will not distinguish between the static type
and the underlying type. In:

	var x MyString = "x"
	t := reflect.TypeOf(x)
	println(t.Kind() == reflect.String)

the Kind of x is still reflect.String, even though the static type of x
is MyString.

Moreover, checking for the map's key type is a string occurs first, so
even if the map key type MyString implements encoding.TextUnmarshaler,
it will be ignored.

To fix the bug, check for encoding.TextUnmarshaler first.

Fixes #34437

Change-Id: I780e0b084575e1dddfbb433fe03857adf71d05fb
Reviewed-on: https://go-review.googlesource.com/c/go/+/200237
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>

Compact has been inconsistently escaping only some problematic characters
(U+2028 and U+2029), but not others (<, > and &). This change addresses
this inconsistency by removing the escaping of U+2028 and U+2029.

Callers who need to escape the output of Compact should use HTMLEscape
which escapes <, >, &, U+2028 and U+2029.

Fixes #34070
Fixes #30357
Updates #5836

Change-Id: Icfce7691d2b8b1d9b05ba7b64d2d1e4f3b67871b
GitHub-Last-Rev: 38859fe3e2fd586bbd45175c2742f7b123836bf3
GitHub-Pull-Request: golang/go#34804
Reviewed-on: https://go-review.googlesource.com/c/go/+/200217Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>

When in module mode outside of any module, 'go build' and most other
commands will now report an error instead of resolving a package path
to a module.

Previously, most commands would attempt to find the latest version of
a module providing the package. This could be very slow if many
packages needed to be resolved this way. Since there is no go.mod file
where module requirements can be saved, it's a repeatedly slow and
confusing experience.

After this change, 'go build' and other commands may still be used
outside of a module on packages in std and source files (.go
arguments) that only import packages in std. Listing any other package
on the command line or importing a package outside std will cause an
error.

'go get' is exempted from the new behavior, since it's expected that
'go get' resolves paths to modules at new versions.

Updates #32027

Change-Id: Ia9d3a3b4ad738ca5423472e17818d62b96a2c959
Reviewed-on: https://go-review.googlesource.com/c/go/+/198778
Run-TryBot: Jay Conrod <jayconrod@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>

Updates #34669

Change-Id: I8d0ee68885e804e131f42a512080486f9b25e9dd
Reviewed-on: https://go-review.googlesource.com/c/go/+/199819
Run-TryBot: Jay Conrod <jayconrod@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>

go/build.Import locates package dirctories using 'go list' when in
module mode (finding, downloading, and extracting modules is
complicated, so go/build does not handle it).

Previously, Import used 'go list' if GO111MODULE was not explicitly
off and a go.mod file was present (plus some other conditions). With
this change, if GO111MODULE is "on", a go.mod file does not need to be
present.

Fixes #34669

Change-Id: I9e56871054d4b07c3fc04b6f14a5c8c8e9f3c333
Reviewed-on: https://go-review.googlesource.com/c/go/+/199818
Run-TryBot: Jay Conrod <jayconrod@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>

This is part two if the nacl removal. Part 1 was CL 199499.

This CL removes amd64p32 support, which might be useful in the future
if we implement the x32 ABI. It also removes the nacl bits in the
toolchain, and some remaining nacl bits.

Updates #30439

Change-Id: I2475d5bb066d1b474e00e40d95b520e7c2e286e1
Reviewed-on: https://go-review.googlesource.com/c/go/+/200077Reviewed-by: Ian Lance Taylor <iant@golang.org>

Some code tags in the HTML were not properly closed. Close them so that
the text is rendered correctly.

Change-Id: I5c2170ffced313417f65004d53518128c34f7979
Reviewed-on: https://go-review.googlesource.com/c/go/+/200117Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change some decodetype functions to operate on bytes nstead of
Symbol. This is in preparation of implementing live method
tracking in index-based deadcode pass, and reducing/eliminating
sym.Symbol in general.

Change-Id: Ia9809ad7b182884225e1bda577e8dbec0cd216c5
Reviewed-on: https://go-review.googlesource.com/c/go/+/199077Reviewed-by: Austin Clements <austin@google.com>