CL 122518 rolled back an earlier CL that made "go test"
start running test binaries for packages with no *_test.go files.
Add a test as another roadblock to reintroducing that behavior
in the future.
For #26462.
Change-Id: I898103064efee8d6ae65bcf74f4dffc830eae7e9
Reviewed-on: https://go-review.googlesource.com/122595
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
When DWARF is disabled, some alg functions were not generated.
Make sure they are generated when we about to generate calls to
them.
Fixes#23546.
Change-Id: Iecfa0eea830e42ee92e55268167cefb1540980b2
Reviewed-on: https://go-review.googlesource.com/122403
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
The cgo tool records the value of the CGO_LDFLAGS environment variable
in the generated file, so that the linker can later read and use it.
Therefore, we must add CGO_LDFLAGS to the cache ID, as otherwise
changing CGO_LDFLAGS may cause a build result to be incorrectly read
from the cache, producing a different final program.
Change-Id: Ic89c1edc4069837451a36376710ca9b56fb87455
Reviewed-on: https://go-review.googlesource.com/122520
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Fix duplicated index in LHS and RHS of the < operator.
Found using https://go-critic.github.io/overview#dupSubExpr-ref
Change-Id: I9a5a40bbd436b32e8117579a01bc50afe3608c97
Reviewed-on: https://go-review.googlesource.com/122776
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
We need to determine whether arguments to and return values from C
functions are "bad" typedef'd pointer types which need to be uintptr
on the Go side.
The type of those arguments are not specified explicitly. As a result,
we never look through the C declarations for the GetTypeID functions
associated with that type, and never realize that they are bad.
However, in another function in the same package there might be an
explicit reference. Then we end up with the declaration being uintptr
in one file and *struct{...} in another file. Badness ensues.
Fix this by doing a 2-pass algorithm. In the first pass, we run as
normal, but record all the argument and result types we see. In the
second pass, we include those argument types also when reading the C
types.
Fixes#24161
Change-Id: I8d727e73a2fbc88cb9d9899f8719ae405f59f753
Reviewed-on: https://go-review.googlesource.com/122575
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
We need to make sure that the terminating comparison has the right
sense given the increment direction. If the increment is positive,
the terminating comparsion must be < or <=. If the increment is
negative, the terminating comparison must be > or >=.
Do a few cleanups, like constant-folding entry==0, adding comments,
removing unused "exported" fields.
Fixes#26116
Change-Id: I14230ee8126054b750e2a1f2b18eb8f09873dbd5
Reviewed-on: https://go-review.googlesource.com/121940
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Original CL description:
When using test -cover or -coverprofile the output for "no test files"
is the same format as for "no tests to run".
Reverting because this CL changed cmd/go to build test binaries for
packages that have no tests, leading to extra work and confusion.
Updates #24570Fixes#25789Fixes#26157Fixes#26242
Change-Id: Ibab1307d39dfaec0de9359d6d96706e3910c8efd
Reviewed-on: https://go-review.googlesource.com/122518
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
The ADDLmodify/SUBLmodify/ANDLmodify/ORLmodify/XORLmodify should
have clobberFlags set to true.
Change-Id: Ie447d536db51334eddc70c00a722647282186a69
Reviewed-on: https://go-review.googlesource.com/122556
Run-TryBot: Ben Shi <powerman1st@163.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Expanding interface method sets is handled during width calculation,
which can't be performed concurrently. Make sure that we eagerly
expand interfaces in the frontend when importing them, even if they're
not actually used by code, because we might need to generate a type
description of them.
Fixes#25055.
Change-Id: I6fd2756de2c7d5dbc33056f70b3028ca3aebab41
Reviewed-on: https://go-review.googlesource.com/122517
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
CL 118095 added gitrepo tests. These tests are failing on Plan 9
since they expect a full-featured git command, while the git tool
has been emulated as a simple rc script on Plan 9.
Fixes#25938.
Change-Id: I262a89d0ce83168c550d9af3e832ed3a1e3c43f6
Reviewed-on: https://go-review.googlesource.com/122455
Run-TryBot: David du Colombier <0intro@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
The maximum number of 'spanz' iterations that the s390x assembler
performs to reach a fixed point for relative offsets was 10. This
turned out to be too aggressive for one example of auto-generated
fuzzing code. Increase the number of iterations by 10x to reduce
the likelihood that the limit will be hit again. This limit only
exists to help find bugs in the assembler.
master at tip does not fail with the example code in the issue, I
have therefore not submitted it as a test (it is also quite large).
I tested this change with the example code at the commit given and
it fixes the issue.
Fixes#25269.
Change-Id: I0e44948957a7faff51c7d27c0b7746ed6e2d47bb
Reviewed-on: https://go-review.googlesource.com/122235
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Otherwise it is possible that msan will consider the C result to be
partially initialized, which may cause msan to think that the Go stack
is partially uninitialized. The compiler will never mark the stack as
initialized, so without this CL it is possible for stack addresses to
be passed to msanread, which will cause a false positive error from msan.
Fixes#26209
Change-Id: I43a502beefd626eb810ffd8753e269a55dff8248
Reviewed-on: https://go-review.googlesource.com/122196
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Use an HTML comment with triple dashes for the copypright header, which
means that the paragraph will be ignored when rendering both HTML and
TeX.
While at it, quote "GC", and properly link to internal/ssa/README.md.
Change-Id: Ib18529d2fc777d836e74726ff1cfe685e08b063c
Reviewed-on: https://go-review.googlesource.com/109875
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
We already remove -rdynamic if -static appears in -extldflags.
Extend that to apply to CGO_LDFLAGS and #cgo LDFLAGS as well.
Updates #26197
Change-Id: Ibb62d1b20726916a12fd889acb05c1c559a5ace2
Reviewed-on: https://go-review.googlesource.com/122135
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Since the initial version was written, I've gotten help writing
cmd/compile/README.md and I've also learned some more on my own, so it's
time to organise this document better and expand it.
First, split up the document in sections, starting from the simplest
ideas that can be explained on their own. From there, build all the way
up into SSA functions and how they are compiled.
Each of the sections also gets more detail now; most ideas that were a
paragraph are now a section with several paragraphs. No new major
sections have been added in this CL.
While at it, add a copyright notice and make better use of markdown,
just like in the other README.md.
Also fix a file path in value.go, which I noticed to be stale while
reading godocs to write the document.
Finally, leave a few TODO comments for areas that would benefit from
extra input from people familiar with the SSA package. They will be
taken care of in future CLs.
Change-Id: I85e7a69a0b3260e72139991a625d926099624f71
Reviewed-on: https://go-review.googlesource.com/110067
Reviewed-by: Keith Randall <khr@golang.org>
When a command has a test that is not in package main, the main
package is built as a library, with ForceLibrary set. It can of course
also be built as an ordinary main package. If we don't record that fact
in the hash, then both variants of the command will use the same hash,
which causes a GODEBUG=gocacheverify=1 failure. It also seems unsafe
although it's not clear to me whether it can cause an actual failure.
Along with CL 121941,
Fixes#25666
Change-Id: I115ad249012f30fbe45cd0c41da86adc295fe4b2
Reviewed-on: https://go-review.googlesource.com/121942
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
The linker's sym.Symbol struct contains two string fields, "Dynimplib"
and "Dynimpvers" that are used only in very specific circumstances
(for many symbols, such as DWARF syms, they are wasted space). Split
these two off into a separate struct, then point to an instance of
that struct when needed. This reduces the size of sym.Symbol so as to
save space in the common case.
Updates #26186
Change-Id: Id9c74824e78423a215c8cbc105b72665525a1eff
Reviewed-on: https://go-review.googlesource.com/121916
Reviewed-by: Ian Lance Taylor <iant@golang.org>
The sym.Symbol 'Reachparent' field is used only when field tracking
is enabled. So as to use less memory for the common case where
field tracking is not enabled, remove this field and use a side
table stored in the context to achieve the same functionality.
Updates #26186
Change-Id: Idc5f8b0aa323689d4d51dddb5d1b0341a37bb7d2
Reviewed-on: https://go-review.googlesource.com/121915
Reviewed-by: Ian Lance Taylor <iant@golang.org>
The vetx output file is a build output, and as such should be
deterministic. This CL changes it to not depend on map iteration order.
This avoids a pointless GODEBUG=gocacheverify=1 failure.
Updates #25666
Change-Id: Ic132bad134cb10938275f883c2c68432cb7c4409
Reviewed-on: https://go-review.googlesource.com/121941
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
Late opt pass may generate dead stores, which messes up store
chain calculation in later passes. Run generic deadcode even
in -N mode to remove them.
Fixes#26163.
Change-Id: I8276101717bb978d5980e6c7998f53fd8d0ae10f
Reviewed-on: https://go-review.googlesource.com/121856
Run-TryBot: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
These rules don't even type check. ADDQconstmodify returns memory,
and it is being rewritten to a value that returns an int64.
There should be a MOVQstore wrapped around the result.
These rules never fire during all.bash, so they aren't even tested.
I'm just going to remove them for now.
Change-Id: I76008eb51ae4e16c707fac73c05a8d67cac149ae
Reviewed-on: https://go-review.googlesource.com/121935
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
If the address of an auto reaches a phi then any further stores to
the pointer represented by the phi probably need to be kept. This
is because stores to the other arguments to the phi may be visible
to the program.
Fixes#26153.
Change-Id: Ic506c6c543bf70d792e5b1a64bdde1e5fdf1126a
Reviewed-on: https://go-review.googlesource.com/121796
Run-TryBot: Michael Munday <mike.munday@ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Fixes#26173
Change-Id: I032551f63b359c8cbb7296931e1957d2bff8f328
Reviewed-on: https://go-review.googlesource.com/121819
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
TestUtimesNanoAt in the vendored copy of golang.org/x/sys/unix currently
fails on the linux-arm-arm5spacemonkey builder. Update the vendored copy
to pick up the fix from CL 120816.
Updates #26034
Change-Id: I75c8875089f58a4c32e2e7aa75884b2bcba7bd68
Reviewed-on: https://go-review.googlesource.com/121800
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Currently, on Windows, the thread stack size is set or assumed in many
different places. In non-cgo binaries, both the Go linker and the
runtime have a copy of the stack size, the Go linker sets the size of
the main thread stack, and the runtime sets the size of other thread
stacks. In cgo binaries, the external linker sets the main thread
stack size, the runtime assumes the size of the main thread stack will
be the same as used by the Go linker, and the cgo entry code assumes
the same.
Furthermore, users can change the main thread stack size using
editbin, so the runtime doesn't even really know what size it is, and
user C code can create threads with unknown thread stack sizes, which
we also assume have the same default stack size.
This is all a mess.
Fix the corner cases of this and the duplication of knowledge between
the linker and the runtime by querying the OS for the stack bounds
during thread setup. Furthermore, we unify all of this into just
runtime.minit for both cgo and non-cgo binaries and for the main
thread, other runtime-created threads, and C-created threads.
Updates #20975.
Change-Id: I45dbee2b5ea2ae721a85a27680737ff046f9d464
Reviewed-on: https://go-review.googlesource.com/120336
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Currently, we allocate 1MB or 2MB thread stacks on Windows, but in
non-cgo binaries still set the g0 stack bounds assuming only 64k is
available. While this is fine in pure Go binaries, a non-cgo Go binary
on Windows can use the syscall package to call arbitrary DLLs, which
may call back into Go. If a DLL function uses more than 64k of stack
and then calls back into Go, the Go runtime will believe that it's out
of stack space and crash.
Fix this by plumbing the correct stack size into the g0 stacks of
non-cgo binaries. Cgo binaries already use the correct size because
their g0 stack sizes are set by a different code path.
Fixes#20975.
Change-Id: Id6fb559cfe1e1ea0dfac56d4654865c20dccf68d
Reviewed-on: https://go-review.googlesource.com/120195
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Executing tests in cmd/go/internal/modfetch/gitrepo/fetch_test.go in enviroment
witout outside connectivity in to the internet results in tests failure:
2018/06/25 12:48:26 git clone --mirror https://vcs-test.golang.org/git/gitrepo1 /tmp/gitrepo-test-221822392/gitrepo2 in : exit status 128:
Cloning into bare repository '/tmp/gitrepo-test-221822392/gitrepo2'...
fatal: unable to access 'https://vcs-test.golang.org/git/gitrepo1/': Could not resolve host: vcs-test.golang.org
FAIL cmd/go/internal/modfetch/gitrepo 0.144s
Call flag.Parse in TestMain to properly initialize test environment variables
Fixes#26007
Change-Id: I059e27db69c0ca0e01db724035a25d6fefb094b5
Reviewed-on: https://go-review.googlesource.com/120735
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Before GCC 8 C code like
const unsigned long long int neg = (const unsigned long long) -1;
void f(void) { static const double x = (neg); }
would get an error "initializer element is not constant". In GCC 8 and
later it does not.
Because a value like neg, above, can not be used as a general integer
constant, this causes cgo to conclude that it is a floating point
constant. The way that cgo handles floating point values then causes
it to get the wrong value for it: 18446744073709551615 rather than -1.
These are of course the same value when converted to int64, but Go
does not permit that kind of conversion for an out-of-range constant.
This CL side-steps the problem by treating floating point constants
with integer type as they would up being treated before GCC 8: as
variables rather than constants.
Fixes#26066
Change-Id: I6f2f9ac2fa8a4b8218481b474f0b539758eb3b79
Reviewed-on: https://go-review.googlesource.com/121035
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This reverts commit 1a27f048ad.
Reason for revert: Broke the ssacheck and -N-l builders, and the -N-l fix looks like it will take some time and take a different route entirely.
Change-Id: Ie0ac5e86ab7d72a303dfbbc48dfdf1e092d4f61a
Reviewed-on: https://go-review.googlesource.com/121715
Reviewed-by: David Chase <drchase@google.com>
Given a carefully constructed input, writebarrier would
split a block with the OpAddr in the first half and the
VarDef in the second half which ultimately leads to a
compiler crash because the scheduler is no longer able
to put them in the proper order.
To fix, recognize the implicit dependence of OpAddr on
the VarDef of the same symbol if any exists.
This fix was chosen over making OpAddr take a memory
operand to make the dependence explicit, because this
change is less invasive at this late part of the 1.11
release cycle.
Fixes#26105.
Change-Id: I9b65460673af3af41740ef877d2fca91acd336bc
Reviewed-on: https://go-review.googlesource.com/121436
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
SSA can handle 1-element array, but only when the element type
is SSAable. When building SSA for INDEX of 1-element array, we
did not check the element type is SSAable. And when it's not,
it resulted in an unhandled SSA op.
Fixes#26120.
Change-Id: Id709996b5d9d90212f6c56d3f27eed320a4d8360
Reviewed-on: https://go-review.googlesource.com/121496
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
The check was running in the loop that read source files in, much before
any of the other checks ran. Vetxonly makes vet exit early, but after
all the source files have been read.
To fix this, simply run the buildtag check along with all the other
checks that get run on specific syntax tree nodes.
Add a cmd/go test with go test -a, to ensure that the issue as reported
is fixed.
Fixes#26102.
Change-Id: If6e3b9418ffa8166c0f982668b0d10872283776a
Reviewed-on: https://go-review.googlesource.com/121395
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Move badf helper into top-level function so that prints from buildtag.go
are once again themselves printf-format-checked by vet.
Also, fix implementation, which was missing a ... in the Sprintf call and
produced messages like:
/Users/rsc/x_test.go:1: +build comment must appear before package clause and be followed by a blank line%!(EXTRA []interface {}=[])
These were introduced in CL 111415.
Change-Id: I000af3a4e01dc99fc79c9146aa68a71dace1460f
Reviewed-on: https://go-review.googlesource.com/121300
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
Code generation for OpAMD64CMOV[WLQ]EQF uses AX as a scratch register,
but only CMOVQEQF, correctly lets compiler know. Mark other 2 as
clobbering AX.
Fixes#26097
Change-Id: I2a65bd67bf18a540898b4a0ae6c8766e0b767b19
Reviewed-on: https://go-review.googlesource.com/121336
Run-TryBot: Ilya Tocar <ilya.tocar@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Reviewed-by: Giovanni Bajo <rasky@develer.com>
On Wasm, the offset was not folded into LoweredAddr, so it was
not rematerializeable. This led to the address-taken operation
in some cases generated too early, before the local variable
becoming live. The liveness code thinks the variable live when
the address is taken, then backs it up to live at function
entry, then complains about it, because nothing other than
arguments should be live on entry.
This CL folds the offset into the address operation, so it is
rematerializeable and so generated right before use, after the
variable actually becomes live.
It might be possible to relax the liveness code not to think a
variable live when its address being taken, but until the address
actually being used. But it would be quite complicated. As we're
late in Go 1.11 freeze, it would be better not to do it. Also,
I think the address operation is rematerializeable now on all
architectures, so this is probably less necessary.
This may also be a slight optimization, as the address+offset is
now rematerializeable, which can be generated on the Wasm stack,
without using any "registers" which are emulated by local
variables on Wasm. I don't know how to do benchmarks on Wasm. At
least, cmd/go binary size shrinks 9K.
Fixes#25966.
Change-Id: I01e5869515d6a3942fccdcb857f924a866876e57
Reviewed-on: https://go-review.googlesource.com/120599
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Richard Musiol <neelance@gmail.com>
No code changes, only revised comments in an attempt to make
escape analysis slightly less confusing.
Updates #23109.
Change-Id: I5ee6cea0946ced63f6210ac4484a088bcdd862fb
Reviewed-on: https://go-review.googlesource.com/121001
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
This commit changes how JavaScript values are referenced by Go code.
After this change, a JavaScript value is always represented by the same
ref, even if passed multiple times from JavaScript to Go. This allows
Go's == operator to work as expected on js.Value (strict equality).
Additionally, the performance of some operations of the syscall/js
package got improved by saving additional roundtrips to JavaScript code.
Fixes#25802.
Change-Id: Ide6ffe66c6aa1caf5327a2d3ddbe48fe7c180461
Reviewed-on: https://go-review.googlesource.com/120561
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
cmd/go can sometimes take up to 400s on windows due
to various issues (disk I/O on builders being the
latest cause). Increase the timeout scale to account
for this.
Change-Id: I1fd4964472a70fb0f33cf6ed73298c034b9c1fb0
Reviewed-on: https://go-review.googlesource.com/120762
Run-TryBot: Andrew Bonventre <andybons@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
For non-unit increment, loopbce checks to see if the
increment evenly divides the difference between (constant)
loop start and end. This test panics when the increment
is zero.
Fix: check for zero, if found, don't optimize the loop.
Also added missing copyright notice to loopbce.go.
Fixes#26043.
Change-Id: I5f460104879cacc94481949234c9ce8c519d6380
Reviewed-on: https://go-review.googlesource.com/120759
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Add a test by making misc/cgo/testshared/src/trivial.go marginally less
trivial.
Fixes#25970.
Change-Id: I8815d0c56b8850fcdbf9b45f8406f37bd21b6865
Reviewed-on: https://go-review.googlesource.com/120235
Run-TryBot: Michael Hudson-Doyle <michael.hudson@canonical.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
We want to compress DWARF even on macOS, but the native toolchain isn't
going to understand it. Add a flag that can be used to disable
compression, then add Darwin to the whitelist used during internal
linking.
Unlike GNU ld, the Darwin linker doesn't have a handy linker flag to do
compression. But since we're already doing surgery to put the DWARF in
the output executable in the first place, compressing it at the same
time isn't unduly difficult. This does have the slightly odd effect of
compressing some Apple proprietary debug sections, which absolutely
nothing will understand. Leaving them uncompressed didn't make much
sense, though, since I doubt they're useful without (say) __debug_info.
Updates #11799
Change-Id: Ie00b0215c630a798c59d009a641e2d13f0e7ea01
Reviewed-on: https://go-review.googlesource.com/120155
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
After the std tests, most of the rest of the tests aren't applicable
to js/wasm. (anything with -cpu=>1, cgo, etc)
Skip them all for now. We can incrementally re-enable them over time
as the js/wasm port is fleshed out. But let's get the builder column
black again so we can enable trybots and keep it black.
Updates #26014
Updates #26015
Updates #18892
Change-Id: I8992ed3888f598fa42273ce8646a32d62ce45b1d
Reviewed-on: https://go-review.googlesource.com/120575
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Andrew Bonventre <andybons@golang.org>
If expanding an inline function body required lazily expanding a
package-scoped type whose identifier was shadowed within the function
body, the lazy expansion would instead overwrite the local symbol
definition instead of the package-scoped symbol. This was due to
importsym using s.Def instead of s.PkgDef.
Unfortunately, this is yet another consequence of the current awkward
scope handling code.
Passes toolstash-check.
Fixes#25984.
Change-Id: Ia7033e1749a883e6e979c854d4b12b0b28083dd8
Reviewed-on: https://go-review.googlesource.com/120456
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Robert Griesemer <gri@golang.org>
MOVWconst's AuxInt is Int32. SSA check complains if the AuxInt
does not fit in int32. Convert uint32 to int32 to make it happy.
The generated code is unchanged. MOVW only cares low 32 bits.
Passes "toolstash -cmp" std cmd for ARM.
Fixes#25993.
Change-Id: I2b6532c9c285ea6d89652505fb7c553f85a98864
Reviewed-on: https://go-review.googlesource.com/120335
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
expandDecl can be called recursively, so it's not an appropriate place
to clean inimport. Instead, move this up to resolve, along with an
appropriate recursion check.
Passes toolstash-check.
Change-Id: I138d37b057dcc6525c780b4b3fbaa5e97f99655b
Reviewed-on: https://go-review.googlesource.com/120455
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
ARMv8.1 has added new instruction (LDADDAL) for atomic memory operations. This
CL improves existing atomic add intrinsics with the new instruction. Since the
new instruction is only guaranteed to be present after ARMv8.1, we guard its
usage with a conditional on CPU feature.
Performance result on ARMv8.1 machine:
name old time/op new time/op delta
Xadd-224 1.05µs ± 6% 0.02µs ± 4% -98.06% (p=0.000 n=10+8)
Xadd64-224 1.05µs ± 3% 0.02µs ±13% -98.10% (p=0.000 n=9+10)
[Geo mean] 1.05µs 0.02µs -98.08%
Performance result on ARMv8.0 machine:
name old time/op new time/op delta
Xadd-46 538ns ± 1% 541ns ± 1% +0.62% (p=0.000 n=9+9)
Xadd64-46 505ns ± 1% 508ns ± 0% +0.48% (p=0.003 n=9+8)
[Geo mean] 521ns 524ns +0.55%
Change-Id: If4b5d8d0e2d6f84fe1492a4f5de0789910ad0ee9
Reviewed-on: https://go-review.googlesource.com/81877
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
This change was introduced while adding the dark copy
of golang.org/x/vgo in CL 118095.
While the comment made sense in a separate vgo repo, when it is
merged with the main repo, this should not remain.
Found while running mkalldocs.sh in CL 119695.
Change-Id: I112a4629c415032bd29e165ac1c27a0f3cabeede
Reviewed-on: https://go-review.googlesource.com/119938
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Adds the appropriate check to inl.go.
Includes tests of both -race+go:norace and plain go:norace.
Fixes#24651.
Change-Id: Id806342430c20baf4679a985d12eea3b677092e0
Reviewed-on: https://go-review.googlesource.com/119195
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
The existing code for encoding 'for' loops in exported, inlineable
functions incorrectly assumed that the 'Right' field points to an
'expression' node. Adjusted the code to be able to handle any kind
of node. Made matching changes for the binary and indexed exporter.
This only shows up together with other pending compiler changes that
enable exporting of such functions which contain for loops.
No tests yet because we can't test this w/o those pending compiler
changes. Once those changes are in, this code will be tested implicitly.
However, the changes were tested manually together with the patches
described in the issue.
Fixes#25222.
Change-Id: I54babb87e5d665d2c1ef6116c1de1b8c50b1138e
Reviewed-on: https://go-review.googlesource.com/119595
Reviewed-by: David Chase <drchase@google.com>
Use more cryptic names for local variables inside C function wrappers.
Fixes#23356
Change-Id: Ia6a0218f27a13be14f589b1a0facc9683d22ff56
Reviewed-on: https://go-review.googlesource.com/86495
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
It is possible to highlight up to 12 SSA values
and outlinte up to 11 SSA blocks.
Change-Id: Ifefb813ba07ee8856681552b77199f409e03d74d
Reviewed-on: https://go-review.googlesource.com/119318
Run-TryBot: Yury Smolsky <yury@smolsky.by>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
This CL removes the last of the direct system calls in the runtime package.
This is the last CL for 1.11.
Use libcCall instead of asmcgocall in a few places I accidentally used
the wrong one.
For 1.12, we need to think about whether/how the syscall package
should be moved over to libc.
Update #17490
Change-Id: I4f0bd9cd6023f662f2e29588266fdfae5233898f
Reviewed-on: https://go-review.googlesource.com/118736
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Forked from CL 111895.
The trickiest part of this is that the binary layout code (blk,
elfshbits, and various other things) assumes a constant offset between
symbols' and sections' file locations and their virtual addresses.
Compression, of course, breaks this constant offset. But we need to
assign virtual addresses to everything before compression in order to
resolve relocations before compression. As a result, compression needs
to re-compute the "address" of the DWARF sections and symbols based on
their compressed size. Luckily, these are at the end of the file, so
this doesn't perturb any other sections or symbols. (And there is, of
course, a surprising amount of code that assumes the DWARF segment
comes last, so what's one more place?)
Relevant benchmarks:
name old time/op new time/op delta
StdCmd 10.3s ± 2% 10.8s ± 1% +5.43% (p=0.000 n=30+30)
name old text-bytes new text-bytes delta
HelloSize 746kB ± 0% 746kB ± 0% ~ (all equal)
CmdGoSize 8.41MB ± 0% 8.41MB ± 0% ~ (all equal)
[Geo mean] 2.50MB 2.50MB +0.00%
name old data-bytes new data-bytes delta
HelloSize 10.6kB ± 0% 10.6kB ± 0% ~ (all equal)
CmdGoSize 252kB ± 0% 252kB ± 0% ~ (all equal)
[Geo mean] 51.5kB 51.5kB +0.00%
name old bss-bytes new bss-bytes delta
HelloSize 125kB ± 0% 125kB ± 0% ~ (all equal)
CmdGoSize 145kB ± 0% 145kB ± 0% ~ (all equal)
[Geo mean] 135kB 135kB +0.00%
name old exe-bytes new exe-bytes delta
HelloSize 1.60MB ± 0% 1.05MB ± 0% -34.39% (p=0.000 n=30+30)
CmdGoSize 16.5MB ± 0% 11.3MB ± 0% -31.76% (p=0.000 n=30+30)
[Geo mean] 5.14MB 3.44MB -33.08%
Fixes#11799.
Updates #6853.
Change-Id: I64197afe4c01a237523a943088051ee056331c6f
Reviewed-on: https://go-review.googlesource.com/118276
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Add Go buildids into a custom wasm section ("go.buildid", arbitrarily)
early in the wasm module, right after the magic & version.
Fixes#25910
Change-Id: If3f7cb267bf8c7beb6fa8d8b7a4829419720bbd8
Reviewed-on: https://go-review.googlesource.com/119175
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
This CL corresponds to golang.org/cl/118096 (7fbc8df48a7)
in the vgo repo.
It copies the bulk of the code from vgo back into the main repo,
but completely disabled - vgo.Init is a no-op and vgo.Enabled
returns false unconditionally.
The point of this CL is to make the two trees easier to diff and
to make future syncs smaller.
Change-Id: Ic34fd5ddd8272a70c5a3b3437b5169e967d0ed03
Reviewed-on: https://go-review.googlesource.com/118095
Reviewed-by: Bryan C. Mills <bcmills@google.com>
The ld/macho code currently understands a subset of the mach-o load
commands. I've encountered one of these in the wild in a Go-produced
binary, which tripped up the Go linker because its switch statement
expects its list of load commands to be exhaustive; the rest I've
added for the sake of completion.
The ruby-macho library is a good non-Darwin header resource for these:
https://github.com/homebrew/ruby-machoFixes#25908
Change-Id: Ib54c065d27e87d8726a9870df05a2bae24828b98
GitHub-Last-Rev: 655e3f488a
GitHub-Pull-Request: golang/go#25906
Reviewed-on: https://go-review.googlesource.com/119115
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Chrome and Node.js were not showing the names of WebAssembly
functions any more. This was due to the name section containing
names also for import functions, which is redundant.
Change-Id: I2f2b2d0b5bd7a59b34f108d2fd7b6ba2eb26f9c9
Reviewed-on: https://go-review.googlesource.com/118976
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Currently these two forms of layout are done in a single pass. This
makes it difficult to compress DWARF sections because that must be
done after relocations are applied, which must happen after virtual
address layout, but we can't layout the file until we've compressed
the DWARF sections.
Fix this by separating the two layout steps. In the process, we can
also unify the copy-pasted code in Link.address to compute file
offsets, which currently has some unnecessary variation.
Unlike the current file offset computation, which depends on virtual
addresses, the new computation only uses file offsets and sizes. This
will let us compress the file representation of a segment and create
the file layout based on its on-disk size rather than its original
in-memory size.
Tested by comparing the test binary for the "strings" package on all
supported GOOS/GOARCH combinations. All binaries are identical
(except, of course, their build IDs).
This is a second attempt at CL 111682.
For #11799.
Fixes#25863.
Change-Id: If09f28771bb4d78dd392fd58b8d7c9d5f22b0b9e
Reviewed-on: https://go-review.googlesource.com/118716
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit enables vet/all for the js/wasm architecture. It got
skipped initially because the codebase did not fully compile yet
for js/wasm, which made vet/all fail.
startTimer and stopTimer are not needed in the syscall package.
Removed their assembly code since their Go stubs were already gone.
Change-Id: Icaeb6d903876e51ceb1edff7631f715a98c28696
Reviewed-on: https://go-review.googlesource.com/118657
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit adds support for JavaScript callbacks back into
WebAssembly. This is experimental API, just like the rest of the
syscall/js package. The time package now also uses this mechanism
to properly support timers without resorting to a busy loop.
JavaScript code can call into the same entry point multiple times.
The new RUN register is used to keep track of the program's
run state. Possible values are: starting, running, paused and exited.
If no goroutine is ready any more, the scheduler can put the
program into the "paused" state and the WebAssembly code will
stop running. When a callback occurs, the JavaScript code puts
the callback data into a queue and then calls into WebAssembly
to allow the Go code to continue running.
Updates #18892
Updates #25506
Change-Id: Ib8701cfa0536d10d69bd541c85b0e2a754eb54fb
Reviewed-on: https://go-review.googlesource.com/114197
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
It's non-portable, and the test isn't hard to write without diff.
It still produces helpful output in case of trouble:
--- FAIL: TestCoverHTML (0.75s)
cover_test.go:325: line 4 differs: got:
case <-ch:<span class="cov0" title="0"></span>
want:
case <-ch:<span class="cov0" xitle="0"></span>
This makes the test operating-system independent.
Change-Id: Iff35f00cb76ba89bc1b93db01c6f994e74341f4a
Reviewed-on: https://go-review.googlesource.com/118795
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Instead of first looking for values of unnamed signature type, first
treat the types and builtins. All the remaining cases will be what we're
after.
Change-Id: I328e22ae0be1cccaeb45ed4ddaa360233d447e7e
Reviewed-on: https://go-review.googlesource.com/117835
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Robert Griesemer <gri@golang.org>
Inlining of switch statements into a RETURNed expression
can sometimes lead to the switch being walked twice, which
results in a miscompiled switch statement. The bug depends
on:
1) multiple results
2) named results
3) a return statement whose expression includes a call to a
function containing a switch statement that is inlined.
It may also be significant that the default case of that
switch is a panic(), though that's not proven.
Rearranged the walk case for ORETURN so that double walks are
not possible. Added a test, because this is so fiddly.
Added a check against double walks, verified that it fires
w/o other fix.
Fixes#25776.
Change-Id: I2d594351fa082632512ef989af67eb887059729b
Reviewed-on: https://go-review.googlesource.com/118318
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
This change updates the go tool's documentation under the section
"Generate Go files by processing source" to mention the convention that
generated source files should have a line of text that matches the
following regular expression:
^// Code generated .* DO NOT EDIT\.$
Previously, the canonical documentation for this convention
(https://golang.org/s/generatedcode) referenced Rob Pike's comment at
https://golang.org/issue/13560#issuecomment-288457920. This change
merely moves that information to a more visible place.
Updates #25433.
Change-Id: I804d95d307d1dc68cb28da3750ebe9090178c474
Reviewed-on: https://go-review.googlesource.com/118756
Reviewed-by: Rob Pike <r@golang.org>
This avoids name conflicts when two identical packages use cgo.
This can happen in practice when the same package is vendored multiple
times in a single build.
Fixes#23555
Change-Id: I9f0ec6db9165dcf9cdf3d314c668fee8ada18f9c
Reviewed-on: https://go-review.googlesource.com/118739
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Ensure that compiler error suggestions after case insensitive
field lookups don't mistakenly reported unexported fields if
those fields aren't in the local package being processed.
Fixes#25727
Change-Id: Icae84388c2a82c8cb539f3d43ad348f50a644caa
Reviewed-on: https://go-review.googlesource.com/117755
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
Reviewed-by: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
The current implementation does not support calling C variadic
functions (as discussed in #975). Document that.
Fixes#23537
Change-Id: If4c684a3d135f3c2782a720374dc4c07ea66dcbb
Reviewed-on: https://go-review.googlesource.com/90415
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Display just a few columns in ssa.html, other
columns can be expanded by clicking on collapsed column.
Use sans serif font for the text, slightly smaller font size
for non program text.
Fixes#25286
Change-Id: I1094695135401602d90b97b69e42f6dda05871a2
Reviewed-on: https://go-review.googlesource.com/117275
Run-TryBot: Yury Smolsky <yury@smolsky.by>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
This is needed in addition to CL 110066 in order to be able to generate
Go type definitions for linux/riscv64 in the golang.org/x/sys/unix
package.
Change-Id: I4a27e6424aaea63283b55bd4f73b958b41f29d72
Reviewed-on: https://go-review.googlesource.com/118618
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
CL 108156 added -cgo and -export,
but in the usage line it added -cgo and -list.
CL 117015 correctly added -export to the usage line.
All that remains is to remove -list.
Change-Id: I8cc5cfc78bc6b52080ae1b861f92620a8f18b53f
Reviewed-on: https://go-review.googlesource.com/118375
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Currently these two forms of layout are done in a single pass. This
makes it difficult to compress DWARF sections because that must be
done after relocations are applied, which must happen after virtual
address layout, but we can't layout the file until we've compressed
the DWARF sections.
Fix this by separating the two layout steps. In the process, we can
also unify the copy-pasted code in Link.address to compute file
offsets. Currently, each instance of this is slightly different, but
there's no reason for it to be. For example, we don't perform
PEFILEALIGN alignment on Segrodata or Selreltodata even when HeadType
== Hwindows, but it turns out it doesn't matter whether you do or
don't because these segments simply don't exist on Windows. Hence, in
the unified code path, we do this alignment for all segments.
Likewise, there are two ways of computing Fileoff:
seg.Vaddr - prev.Vaddr + prev.Fileoff
and
prev.Fileoff + uint64(Rnd(int64(prev.Filelen), int64(*FlagRound)))
At the moment, these always have the same value, but the latter will
continue to work after we start compressing sections on disk.
Tested by comparing test binaries for all packages in std before and
after this change for GOOS={linux,windows,darwin,plan9}. All binaries
are identical.
For #11799.
Change-Id: If09f28771bb4d78dd392fd58b8d7c9d5f22b0b9f
Reviewed-on: https://go-review.googlesource.com/111682
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Before this CL, if you had GOCACHE=/some/dir, then the cmd/go tests used it.
But if you were relying on the implicit behavior that GOCACHE being empty
meant an appropriate system-specific cache directory, then the cmd/go tests
ran with no cache at all, which makes them about 4X slower.
During all.bash GOCACHE is set to a fresh temporary directory and is therefore
already getting proper caching; this CL mainly helps people running 'go test cmd/go'
by hand.
Change-Id: I7c322ca79b877c1d0a3b448b95d5354fbfcba7f8
Reviewed-on: https://go-review.googlesource.com/118320
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
ARM64 manual says it is "constrained unpredictable" if the src
and dst registers of STLXRB are same, although it doesn't seem
to cause any problem on real hardwares so far. Fix by allocating
a different register to hold the updated value for
AtomicAnd8/Or8. We do this by making the ops returns <val,mem>
like AtomicAdd, although val will not be used elsewhere.
Fixes#25823.
Change-Id: I735b9822f99877b3c7aee67a65e62b7278dc40df
Reviewed-on: https://go-review.googlesource.com/117976
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Wei Xiao <Wei.Xiao@arm.com>
The original fix (https://go-review.googlesource.com/c/go/+/35831)
for this issue was incorrect as it reported cycles in cases where
it shouldn't.
Instead, use a different approach: A type cycle containing aliases
is only a cycle if there are no type definitions. As soon as there
is a type definition, alias expansion terminates and there is no
cycle.
Approach: Split sprint_depchain into two non-recursive and more
easily understandable functions (cycleFor and cycleTrace),
and use those instead for cycle reporting. Analyze the cycle
returned by cycleFor before issueing an alias cycle error.
Also: Removed original fix (main.go) which introduced a separate
crash (#23823).
Fixes#18640.
Fixes#23823.
Fixes#24939.
Change-Id: Ic3707a9dec40a71dc928a3e49b4868c5fac3d3b7
Reviewed-on: https://go-review.googlesource.com/118078
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Also:
- Add extra SystemStack space for darwin/arm64 just
like for darwin/arm.
- Removed redundant stack alignment; the arm64 hardware enforces
the 16 byte alignment.
- Save and restore the g registers at library initialization.
- Zero g registers since libpreinit can call libc functions
that in turn use asmcgocall. asmcgocall requires an initialized g.
- Change asmcgocall to work even if no g is set. The change mimics
amd64.
Change-Id: I1b8c63b07cfec23b909c0d215b50dc229f8adbc8
Reviewed-on: https://go-review.googlesource.com/117176
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
This CL takes advantage of the ability to record vet-specific export data,
added in CL 108558, to save information about observed printf wrappers.
Then calls to those wrappers from other packages can be format-checked.
This found a few real mistakes using previously-unrecognized printf
wrappers in cmd/compile. It will no doubt find real mistakes in external code.
Change-Id: I9c29c92d89bbdc984571a174a96e6054585e9cd4
Reviewed-on: https://go-review.googlesource.com/108559
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>
This CL makes it possible for vet to write down notes about one package
and then access those notes later, when analyzing other code importing
that package. This is much like what the compiler does with its own export
data for type-checking, so we call it "vet-export" data or vetx data.
The next CL in the stack makes vet actually use this functionality.
Change-Id: Ic70043ab407dfbfdb3f30eaea7c0e3c8197009cf
Reviewed-on: https://go-review.googlesource.com/108558
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Keep searching for a package that is both findable and importable. The
current code would always guarantee that a package was findable but
exited if it was not importable.
Fixes#25478
Change-Id: I237b7dfafb930cae02538c4a2e4d5ce0c1058478
Reviewed-on: https://go-review.googlesource.com/114295
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Rob Pike <r@golang.org>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
CL 115975 changed TestGoExec to check symbol types.
However, this test is failing on Plan 9, because
there is no read-only data segment symbol on Plan 9.
This change fixes TestGoExec to replace the check
of read-only data segment symbol (R) by data segment
symbol (D) on Plan 9.
Fixes#25820.
Change-Id: I7164cd9056fa1dfcd1dc1b0f87653290c14c85fa
Reviewed-on: https://go-review.googlesource.com/118035
Run-TryBot: David du Colombier <0intro@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Currently .DepOnly is set when go list -test is invoked to help
distinguish those packages that matched the command line spec from those
which are dependencies (of test packages). This is also useful when
calling go list -deps for the same reason.
Change-Id: Ifc0e68dad0fd01355928793ef803691dee5f4f29
Reviewed-on: https://go-review.googlesource.com/112755
Run-TryBot: Paul Jolly <paul@myitcv.org.uk>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>
An upcoming change to cmd/go will enable this functionality, which
allows vet to write down information about one package for use by
later invocation of vet that analyze code importing that package.
We've intended to do this for a long time, but the build caching was
necessary to have a decent way to manage the vet-specific export data.
This is also an experiment in building scalable whole-program analyses.
In the long term we'd like to allow other analyses to be invoked this way.
Change-Id: I34e4b70445786b2e8707ff6a0c00947bf1491511
Reviewed-on: https://go-review.googlesource.com/117099
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
This adds the support to enable the race detector for ppc64le.
Added runtime/race_ppc64le.s to manage the calls from Go to the
LLVM tsan functions, mostly converting from the Go ABI to the
PPC64 ABI expected by Clang generated code.
Changed racewalk.go to call racefuncenterfp instead of racefuncenter
on ppc64le to allow the caller pc to be obtained in the asm code
before calling the tsan version.
Changed the set up code for racecallbackthunk so it doesn't use
the autogenerated save and restore of the link register since that
sequence uses registers inconsistent with the normal ppc64 ABI.
Made various changes to recognize that race is supported for
ppc64le.
Ensured that tls_g is updated and accessible from race_linux_ppc64le.s
so that the race ctx can be obtained and passed to tsan functions.
This enables the race tests for ppc64le in cmd/dist/test.go and
increases the timeout when running the benchmarks with the -race
option to avoid timing out.
Updates #24354, #23731
Change-Id: Ib97dc7ac313e6313c836dc7d2fb698f9d8fba3ef
Reviewed-on: https://go-review.googlesource.com/107935
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
"Syntax analysis" sounds more familiar and fits the
item before, which says "lexical analysis".
If there was specific intention to the original wording,
I, as a reader, would like to see it instead of this
confusing wording.
Change-Id: Id32dbf75300a86b21cb9f35e54526184fe5df6cb
Reviewed-on: https://go-review.googlesource.com/117696
Reviewed-by: Robert Griesemer <gri@golang.org>
Hardware AES support in Go on s390x currently requires ECB, CBC
and CTR modes be available. It also requires that either the
GHASH or GCM facilities are available. The existing checks missed
some of these constraints.
While we're here simplify the cpu package on s390x, moving masking
code out of assembly and into Go code. Also, update SHA-{1,256,512}
implementations to use the cpu package since that is now trivial.
Finally I also added a test for internal/cpu on s390x which loads
/proc/cpuinfo and checks it against the flags set by internal/cpu.
Updates #25822 for changes to vet whitelist.
Change-Id: Iac4183f571643209e027f730989c60a811c928eb
Reviewed-on: https://go-review.googlesource.com/114397
Run-TryBot: Michael Munday <mike.munday@ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
The Solaris assembler uses a different syntax for section directives.
Fixes https://gcc.gnu.org/PR85429.
Change-Id: I1e54dffee3290046dbb68ba4e90ab795c6b72571
Reviewed-on: https://go-review.googlesource.com/109140
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This is extension to https://golang.org/cl/113955 that handled
duplicated "unresolved relocation" errors.
For platforms with trampoline support, additional error is generated
per each undefined symbol. This breaks TestUndefinedRelocErrors test
on these platforms.
Proposed fix:
1. Changes error text to be identical to normal undefined reloc.
If relocation is undefined, jump to it will be unresolved
as well.
2. Introduces a map that can be used by all sites that
handle this kind of errors which makes it easier
to report such errors exactly once.
Errors on ppc64 before this change (note first 4 lines):
main.defined1: unresolved inter-package jump to main.undefined()
main.defined1: unresolved inter-package jump to main.undefined()
main.defined2: unresolved inter-package jump to main.undefined()
main.defined2: unresolved inter-package jump to main.undefined()
main.defined1: relocation target main.undefined not defined
main.defined2: relocation target main.undefined not defined
runtime.main_main·f: function main is undeclared in the main package
After this change:
main.defined1: relocation target main.undefined not defined
main.defined2: relocation target main.undefined not defined
runtime.main_main·f: function main is undeclared in the main package
Because of (1), errors output is the same on all platforms now.
Fixes#25753
Change-Id: Ic3084202a6fc5d4a6d2d0a93344f012b37fe58ed
Reviewed-on: https://go-review.googlesource.com/116676
Run-TryBot: Iskander Sharipov <iskander.sharipov@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
CL 116975 added TestCoverHTML. However, this test is failing
on Plan 9, because the GNU diff tool is called "ape/diff"
instead of "diff" on Plan 9.
This change replaces the "diff" command by the "ape/diff"
command on Plan 9.
Fixes#25795.
Change-Id: I15b49868cd09f3f977aa13fffdfc430c882bf757
Reviewed-on: https://go-review.googlesource.com/117415
Run-TryBot: David du Colombier <0intro@gmail.com>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Turns out it doesn't currently matter, as these ops are always issued
together with a BTSL which does clobber flags. So I can't write a test
that currently fails. But better to be future-proof.
BS{F,R}Q generates flags, so it doesn't need to be marked as clobbering.
Change-Id: I70daea154023fd435fac696bf3a384803c647cd3
Reviewed-on: https://go-review.googlesource.com/117375
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This is a refinement of CL 114855, which fixed the empty clause case,
but broke some other cases where segment boundaries can coincide
for other reasons.
Fixes#25767.
Change-Id: I2a387c83f9d651c8358f3e11b03f6167af0eb8bf
Reviewed-on: https://go-review.googlesource.com/116976
Run-TryBot: David Symonds <dsymonds@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
This adds a case for what was fixed in 4fe688c to prevent regression;
a follow-on change will address #25767.
Change-Id: Iced8cc10e2993ef7caf7e9c59ffbc7147d78ddd7
Reviewed-on: https://go-review.googlesource.com/116975
Run-TryBot: David Symonds <dsymonds@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
If a package is checked out in the right place, but uses, for instance,
an unusual Git remote configuration, don't refuse to update just because
cmd/go can't parse it. In most cases, `git pull -ff-only` (or the
equivalent in other VCSes) works just fine.
Updates #25432.
Change-Id: I1952a0e6e03f185f34029b186e1756c9549689e1
Reviewed-on: https://go-review.googlesource.com/113456
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Andrew Gerrand <adg@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
These got lost because I violated the cardinal rule of Gerrit
which is never click the Submit button in the web UI.
Change-Id: I8ccdfb5d8691960f244941036d33fb5a5a3f0c9a
Reviewed-on: https://go-review.googlesource.com/117015
Reviewed-by: Russ Cox <rsc@golang.org>
This is needed when we are re-building to the wasm target.
Fixes#25774
Change-Id: I5dc47bd7e56c8570b8d2485273ef0d10f2feac6f
Reviewed-on: https://go-review.googlesource.com/116915
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
We want package analysis tools to be able to ask cmd/go for
cgo-translated files and for the names of files holding export
type information, instead of reinventing that logic themselves.
Allow them to do so, with the new list -cgo and -export flags.
Change-Id: I860df530d8dcc130f1f328413381b5664cc81c3b
Reviewed-on: https://go-review.googlesource.com/108156
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
This line of the inlining tuning experiment
https://go-review.googlesource.com/c/go/+/109918/1/src/cmd/compile/internal/gc/inl.go#347
was incorrectly rewritten in a later patch to use the call
cost, not the panic cost, and thus the inlining of panic
didn't occur when it should. I discovered this when I
realized that tests should have failed, but didn't.
Fix is to make the correct change, and also to modify the
tests that this causes to fail. One test now asserts the
new normal, the other calls "ppanic" instead which is
designed to behave like panic but not be inlined.
Change-Id: I423bb7f08bd66a70d999826dd9b87027abf34cdf
Reviewed-on: https://go-review.googlesource.com/116656
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
The wasm archtecture was missing a rule to handle OffPtr with a
negative offset. This commit makes it so OffPtr always gets lowered
to I64AddConst.
Fixes#25741
Change-Id: I1d48e2954e3ff31deb8cba9a9bf0cab7c4bab71a
Reviewed-on: https://go-review.googlesource.com/116595
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
When using test -cover or -coverprofile the output for "no test files"
is the same format as for "no tests to run".
Fixes#24570
Change-Id: If05609411676d42d94c1feac4bc839974fae2cc1
Reviewed-on: https://go-review.googlesource.com/115095
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
There is no benefit in continuing compilation if there
are type-checking errors. This will increase robustness
of the compiler in the presence of errors.
Fixes#22909.
Change-Id: I1c70c667e5927646ba3d0f370e33705165620f12
Reviewed-on: https://go-review.googlesource.com/116335
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Found while tracking down another issue.
Change-Id: If06eee72ce3e3f45dc00b3b68670e1e4d99c87a7
Reviewed-on: https://go-review.googlesource.com/116455
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
In the old binary export format, parameter names for parameter lists
which contained only types where never written, so this problem didn't
come up.
Fixes#25101.
Change-Id: Ia8b817f7f467570b05f88d584e86b6ef4acdccc6
Reviewed-on: https://go-review.googlesource.com/116376
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
For given program with 2 undefined relocations (main and undefined):
package main
func undefined()
func defined() int {
undefined()
undefined()
return 0
}
var x = defined()
"go tool link" produces these errors:
main.defined: relocation target main.undefined not defined
main.defined: relocation target main.undefined not defined
runtime.main_main·f: relocation target main.main not defined
main.defined: undefined: "main.undefined"
main.defined: undefined: "main.undefined"
runtime.main_main·f: undefined: "main.main"
After this CL is applied:
main.defined: relocation target main.undefined not defined
runtime.main_main·f: function main is undeclared in the main package
Fixes#10978
Improved error message for main proposed in #24809.
Change-Id: I4ba8547b1e143bbebeb4d6e29ea05d932124f037
Reviewed-on: https://go-review.googlesource.com/113955
Run-TryBot: Iskander Sharipov <iskander.sharipov@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
CL 109340 added “minimal module-awareness for legacy operation.”
One part of that is reinterpreting imports inside code trees with go.mod files
as using semantic import versioning, and converting them back to
legacy import paths by stripping the major version element
(for example, interpreting import "x.com/foo/v2/bar" as import "x.com/foo/bar").
This rewrite was not being applied during "go get", with the effect that once
you had the target code downloaded already, everything was fine,
but it didn't download and build successfully the first time.
Fixes#25687.
Change-Id: I3e122efdc8fd9a0a4e66f5aa3e6a99f90c7df779
Reviewed-on: https://go-review.googlesource.com/115797
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
These tests were meant to be included into https://golang.org/cl/113315,
but were lost somewhere in the middle.
This CL adds hand-written AVX-512 tests that complement
auto-generated test suite.
It's worth including it, because:
- It covers every new Z-case explicitly
- Does checks every opcode suffix encoding
Change-Id: Id6da5f58773e07bef3d532fc3ca5db391d380ebf
Reviewed-on: https://go-review.googlesource.com/115858
Run-TryBot: Iskander Sharipov <iskander.sharipov@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
The stack frame includes the callee args section. At the point where
we were checking the frame size, that part of the frame had not been
computed yet. Move the check later so we can include the callee args size.
Fixes#20780
Update #25507
Change-Id: Iab97cb89b3a24f8ca19b9123ef2a111d6850c3fe
Reviewed-on: https://go-review.googlesource.com/115195
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
Each URL was manually verified to ensure it did not serve up incorrect
content.
Change-Id: I4dc846227af95a73ee9a3074d0c379ff0fa955df
Reviewed-on: https://go-review.googlesource.com/115798
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
There are two issues in the arm64 assembler.
1. "CMPW $0x22220000, RSP" is encoded to 5b44a4d2ff031b6b, which
is the combination of "MOVD $0x22220000, Rtmp" and
"NEGSW Rtmp, ZR".
The right encoding should be a combination of
"MOVD $0x22220000, Rtmp" and "CMPW Rtmp, RSP".
2. "AND $0x22220000, R2, RSP" is encoded to 5b44a4d25f601b00,
which is the combination of "MOVD $0x22220000, Rtmp" and
an illegal instruction.
The right behavior should be an error report of
"illegal combination", since "AND Rtmp, RSP, RSP" is invalid
in armv8.
This CL fixes the above 2 issues and adds more test cases.
fixes#25557
Change-Id: Ia510be26b58a229f5dfe8a5fa0b35569b2d566e7
Reviewed-on: https://go-review.googlesource.com/114796
Run-TryBot: Ben Shi <powerman1st@163.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Pprof usage message includes "%" symbols. Misuse of Fprintf caused
the message to be interpreted as a format string and corrupted the usage
message.
Change-Id: I4732b491e2368cff9fdbfe070c125228d6f506fd
Reviewed-on: https://go-review.googlesource.com/115595
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This reverts commit ea200340702cf3ccfac7c5db1f11bb65c80971c7 now
that CL 114695 fixed the root cause of #25504.
Change-Id: If437fc832983bd8793bde28ce0e2e64436a0596c
Reviewed-on: https://go-review.googlesource.com/114087
Reviewed-by: David Chase <drchase@google.com>
This reverts golang.org/cl/110775
Reason for revert: this is causing huge slow-dows on every run after
the 1st, on various benchmarks, on multiple architectures (see Issue
25622 for details). It's just a nice-to-have little optimization, and
we're near the 1st go1.11 beta release, so I'm reverting it.
Fixes#25622
Change-Id: I758ade4af4abf764abd8336d404396992d11a0c6
Reviewed-on: https://go-review.googlesource.com/115535
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
We want authors to be able to publish code that works with both
the current standard go command and the planned new go command
support for modules. If authors have tagged their code v2 or later,
semantic import versioning means the import paths must include a
v2 path element after the path prefix naming the module.
One option for making this convention compatible with original go get
is to move code into a v2 subdirectory of the root.
That makes sense for some authors, but many authors would prefer
not to move all the code into a v2 subdirectory for a transition and
then move it back up once we everyone has a module-aware go command.
Instead, this CL teaches the old (non-module-aware) go command
a tiny amount about modules and their import paths, to expand
the options for authors who want to publish compatible packages.
If an author has a v2 of a package, say my/thing/v2/sub/pkg,
in the my/thing repo's sub/pkg subdirectory (no v2 in the file system path),
then old go get continues to import that package as my/thing/sub/pkg.
But when go get is processing code in any module (code in a tree with
a go.mod file) and encounters a path like my/thing/v2/sub/pkg,
it will check to see if my/thing/go.mod says "module my/thing/v2".
If so, the go command will read the import my/thing/v2/sub/pkg
as if it said my/thing/sub/pkg, which is the correct "old" import path
for the package in question.
This CL will be back-ported to Go 1.10 and Go 1.9 as well.
Once users have updated to the latest Go point releases containing
this new logic, authors will be able to update to using modules
within their own repos, including using semantic import paths
with vN path elements, and old go get will still be able to consume
those repositories.
This CL also makes "go get" ignore meta go-import lines using
the new "mod" VCS type. This allows a package to specify both
a "mod" type and a "git" type, to present more efficient module
access to module-aware go but still present a Git repo to the old
"go get".
Fixes#24751.
Fixes#25069.
Change-Id: I378955613a0d63834d4f50f121f4db7e4d87dc0a
Reviewed-on: https://go-review.googlesource.com/109340
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
On architectures where G is stored in a register, it is
possible for a variable to allocated to it, and subsequently
that variable may be spilled and reloaded, for example
because of an intervening call. If such an allocation
reaches a join point and it is the primary predecessor,
it becomes the target of a reload, which is only usually
right.
Fix: guard all the LoadReg ops, and spill value in the G
register (if any) before merges (in the same way that 387
FP registers are freed between blocks).
Includes test.
Fixes#25504.
Change-Id: I0482a53e20970c7315bf09c0e407ae5bba2fe05d
Reviewed-on: https://go-review.googlesource.com/114695
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
This includes changes in pprof to support
- the new -diff_base flag
- fix for a bug in handling of legacy Go heap profiles
Update #25096
Change-Id: I826ac9244f31cc2c4415388c44a0cbe77303e460
Reviewed-on: https://go-review.googlesource.com/115295
Run-TryBot: Hyang-Ah Hana Kim <hyangah@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
The copyright message already appears at the top of macho.go. Drop the
duplicate further down in the file.
Change-Id: Ib0a69f568c4ef656bab14176223936cd2fe078d1
Reviewed-on: https://go-review.googlesource.com/115235
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
When we deadcode-remove a block which is a write barrier test,
remove that block from the list of write barrier test blocks.
Fixes#25516
Change-Id: I1efe732d5476003eab4ad6bf67d0340d7874ff0c
Reviewed-on: https://go-review.googlesource.com/115037
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
