If a type doesn't implement an interface due to an ambiguous method,
say so in the error message instead of just reporting a missing method.
Fixes#57352.
Change-Id: I5608f893c485de578b7f86362ca6f66033653695
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If a method is not found on a type V, for better error messages we
report if the method is on *V. There's no need to do a 2nd lookup
for that because the relevant information is readily returned by
lookupFieldOrMethod already.
Simplifies code and removes a long-standing TODO.
Change-Id: Ibdb2269b04c0db61bfe4641404ab1df330397b2d
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This reverts CL 465805 (commit 3eedba50b1).
Reason for revert: The longtest on Windows was typoed, silently ignored, and it turns out it fails there.
Change-Id: I362e9a22a7ec569314a0da932730ba137a98ecda
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This avoids a very large memory allocation if corrupt data says that
we need to read a very long string.
No test case because the problem can only happen for invalid data. Let
the fuzzer find cases like this.
For #47653Fixes#58886
Change-Id: I4e80ba62a6416d010c8804e4f49ae81bdafaadb8
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In -pgo=auto mode, a package may be built multiple times. E.g. for
go build -pgo=auto cmd/a cmd/b
and both cmd/a and cmd/b imports package p, p may be built twice,
one using a's profile, one using b's. If we need to print p, e.g.
in "go list -deps" or when there is a build failure, p will be
printed twice, and currently we don't distinguish them.
We have a precedence for a similar case: for testing, there is the
original package, and the (internal) test version of the package
(which includes _test.go files). Packages that import the package
under testing may also have two versions (one imports the original,
one imports the testing version). In printing, the go command
distinguishes them by adding a "[p.test]" suffix for the latter,
as they are specifically built for the p.test binary.
We do the similar. When a package needs to be compiled multiple
times for different main packages, we attach the main package's
import path, like "p [cmd/a]" for package p built specifically
for cmd/a.
For #58099.
Change-Id: I4a040cf17e1dceb5ca1810c217f16e734c858ab6
Reviewed-on: https://go-review.googlesource.com/c/go/+/473275
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In -pgo=auto mode, the go command finds a profile named
default.pgo in the main package's directly, and if found, use it
as the profile for the build. Currently we only support a single
main package when -pgo=auto is used.
When multiple main packages are included in a build, they may
have different default profiles (or some have profiles whereas
some don't), so a common dependent package would need to be built
multiple times, with different profiles (or lack of). This CL
handles this. To do so, we need to split (unshare) the dependency
graph so they can attach different profiles.
Fixes#58099.
Change-Id: I1ad21361967aafbf5089d8d5e89229f95fe31276
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Currently, the PGO profile path is global for a single go command
invocation, as it applies to all packages being built (or none).
With -pgo=auto mode with multiple main packages, packages from a
single go command invocation could have different profiles. So it
is necessary that the PGO profile path is per package, which is
this CL does.
For #58099.
Change-Id: I148a15970ec907272db85b4b27ad6b08c41d6c0c
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The previous code only shortened the directory name for files
in the directory being compiled (and $WORK and runtime/std).
This extends the shortening to all file names.
Change-Id: I6abef6141d57036d893420b82e01ed0fbb637788
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This modifies the loopvar change to be tied to the
package if it is specified that way, and preserves
the change across inlining.
Down the road, this will be triggered (and flow correctly)
if the changed semantics are tied to Go version specified
in go.mod (or rather, for the compiler, by the specified
version for compilation).
Includes tests.
Change-Id: If54e8b6dd23273b86be5ba47838c90d38af9bd1a
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Adds:
GOEXPERIMENT=loopvar (expected way of invoking)
-d=loopvar={-1,0,1,2,11,12} (for per-package control and/or logging)
-d=loopvarhash=... (for hash debugging)
loopvar=11,12 are for testing, benchmarking, and debugging.
If enabled,for loops of the form `for x,y := range thing`, if x and/or
y are addressed or captured by a closure, are transformed by renaming
x/y to a temporary and prepending an assignment to the body of the
loop x := tmp_x. This changes the loop semantics by making each
iteration's instance of x be distinct from the others (currently they
are all aliased, and when this matters, it is almost always a bug).
3-range with captured iteration variables are also transformed,
though it is a more complex transformation.
"Optimized" to do a simpler transformation for
3-clause for where the increment is empty.
(Prior optimization of address-taking under Return disabled, because
it was incorrect; returns can have loops for children. Restored in
a later CL.)
Includes support for -d=loopvarhash=<binary string> intended for use
with hash search and GOCOMPILEDEBUG=loopvarhash=<binary string>
(use `gossahash -e loopvarhash command-that-fails`).
Minor feature upgrades to hash-triggered features; clients can specify
that file-position hashes use only the most-inline position, and/or that
they use only the basenames of source files (not the full directory path).
Most-inlined is the right choice for debugging loop-iteration change
once the semantics are linked to the package across inlining; basename-only
makes it tractable to write tests (which, otherwise, depend on the full
pathname of the source file and thus vary).
Updates #57969.
Change-Id: I180a51a3f8d4173f6210c861f10de23de8a1b1db
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In assignments and return statements, if we have the wrong number
of LHS or return values, we report the pattern that we have and
the pattern that we want. For untyped constants we use "number"
(to be not overly specific). For unknown types (due to earlier
errors), now use "unknown type" rather than the (cryptic) "<T>".
Fixes#58742.
Change-Id: I69c84ee29fb64badb0121e26a96f003b381024aa
Reviewed-on: https://go-review.googlesource.com/c/go/+/473255
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Stop depending on base.Pos for these.
Change-Id: I58dea44f8141eb37b59a6e9f7db0c6baa516ad93
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As described here:
https://github.com/golang/go/issues/31636#issuecomment-493271830
"Find the lexically earliest package that is not initialized yet,
but has had all its dependencies initialized, initialize that package,
and repeat."
Simplify the runtime a bit, by just computing the ordering required
in the linker and giving a list to the runtime.
Update #31636Fixes#57411
RELNOTE=yes
Change-Id: I1e4d3878ebe6e8953527aedb730824971d722cac
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Also, renamed lookupFieldOrMethod to lookupFieldOrMethodImpl to make
a clearer distinction between this function and the exported version
LookupFieldOrMethod.
Except for the rename, all changes are to comments only.
Change-Id: If7d1465c9cf659ea86bbbbcba8b95f16d2170fcc
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A 0-sized no-op shouldn't prevent us from detecting that the first
instruction is from an inlined callee.
Update #58300
Change-Id: Ic5f6ed108c54a32c05e9b2264b516f2cc17e4619
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TestGdbPanic expects crash() to raise a SIGABRT signal interceptable
by gdb, but Windows doesn't have signals.
Windows builders haven't caught this failing test because they still
don't have gdb installed (tracked in #22021).
Change-Id: I7c7f2523a54d61aea0a9821c4db7c79e58a7217c
Reviewed-on: https://go-review.googlesource.com/c/go/+/473116
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Fixes revive linter receiver-naming warnings:
- receiver name f should be consistent with previous receiver name e for fileListEntry
- receiver name r should be consistent with previous receiver name z for Reader
- receiver name f should be consistent with previous receiver name h for FileHeader
Change-Id: Ibfa14b97f6ca7adc86e3a1df919c5bb5de9716dc
GitHub-Last-Rev: dd7315b09d
GitHub-Pull-Request: golang/go#58477
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These directives affect the next declaration, so the existing form is
valid, but can be confusing because it is easy to miss. Move then
directly above the declaration for improved readability.
CL 69120 previously moved the Gosched nosplit away to hide it from
documentation. Since CL 224737, directives are automatically excluded
from documentation.
Change-Id: I8ebf2d47fbb5e77c6f40ed8afdf79eaa4f4e335e
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After CL 470215 it should be safe to run this test on Plan 9.
Fixes#26945
Change-Id: I17880b696d2e91e6c4862fac05e6372f44e69b22
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Remove unnecessary assignments by using the same two variables
for methods consistently throughout.
Change-Id: I8b9bc8dbc8022b2472724d2a170f2635de3306e9
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Use a state to exactly track lookup results. In case of lookup failure,
use the state to directly report the cause instead of trying to guess
from the missing and alternative method.
Addresses a TODO (incorrect error message).
Change-Id: I50902752deab741f8199a09fd1ed29286cf5be42
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internal/platform.MustLinkExternal is used in various places to
determine whether external linking is required. It should always
match what the linker actually requires, but today does not match
because the linker imposes additional constraints.
Updates #31544.
Change-Id: I0cc6ad587e95c607329dea5d60d29a5fb2a9e722
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For now this is simply a mechanical combination without any
relevant logic changes. This will make it easier to review
subsequent changes.
Change-Id: Ic2e2ae32b031d2dda0f69a08a5cc2349748bd25d
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After CL 235820 all references to FD.rtimedout and FD.wtimedout
are guarded by mutexes. Therefore they can safely be changed
from type atomic.Bool to bool.
Change-Id: I7ab921d1ad5c7ccc147feb2b0fba58a66b031261
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Go programs can now use the //go:wasmimport module_name function_name
directive to import functions from the WebAssembly runtime.
For now, the directive is restricted to the runtime and syscall/js
packages.
* Derived from CL 350737
* Original work modified to work with changes to the IR conversion code.
* Modification of CL 350737 changes to fully exist in Unified IR path (emp)
* Original work modified to work with changes to the ABI configuration code.
* Fixes#38248
Co-authored-by: Vedant Roy <vroy101@gmail.com>
Co-authored-by: Richard Musiol <mail@richard-musiol.de>
Co-authored-by: Johan Brandhorst-Satzkorn <johan.brandhorst@gmail.com>
Change-Id: I740719735d91c306ac718a435a78e1ee9686bc16
Reviewed-on: https://go-review.googlesource.com/c/go/+/463018
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Change-Id: I18bb87bfdea8b6d7994091ced5134aa2549f221e
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This simplifies the use of missingMethod and also opens the door to
further missingMethod-internal simplifications.
Change-Id: I74d9694b6fca67c4103aea04d08916a69ad0e3c5
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This CL allows missingMethod (and with it the assertableTo methods)
to provide an error cause without an extra external (and messy) call
of missingMethodCause. This latter function is now only called by
missingMethod and can be eliminated eventually in favor of more
precise error causes generated directly by missingMethod.
The change requires that missingMethod (and the assertableTo methods)
accept general types for both relevant argument types (rather than a
Type and a *Interface) so that error causes can report the appropriate
(possibly defined) type rather than the underlying interface type.
Change-Id: Ic31508073fa138dd5fa27285b06cf232ee638685
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An inferred type argument must implement its type parameter's constraint's
methods whether or not a core type exists. This allows us to infer type
parameters used in method signatures.
Fixes#51593.
Change-Id: I1fddb05a71d442641b4311d8e30a13ea9bdb4db5
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This allows us to use missingMethod with different type comparers,
such as the global Identical predicate, or a unifier.
Preparation for the next CL.
Change-Id: I237fd9dd7feb3708847ae6d9a112bcdd0aa1ecb4
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This simply moves the special handling for unbound type parameters
into the switch (which already looks for type parameters).
Change-Id: I2d6d22f3fdffc443065c3681a442288cd1d375ef
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Because we rename type parameters to avoid problems with self-recursive
function calls, there's no need anymore for special (and hard to follow)
logic for pointer-identical types. If they are identical, we have a
match. Simplify the code accordingly.
Change-Id: I2e1838a43e90fa4abfae3ab9e4f7da6463508966
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Adjust imports but no other code changes otherwise.
Change-Id: Iffbd7f9b1786676a42b68d91ee6cc7df07d776bf
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The primary change is that type inference now always reports
an error if a unification step fails (rather than ignoring that
case, see infer2.go). This brings the implementation closely to
the description in #58650; but the implementation is more direct
by always maintaining a simple (type parameter => type) mapping.
To make this work, there are two small but subtle changes in the
unifier:
1) When deciding whether to proceed with the underlying type of
a defined type, we also use the underlying type if the other
type is a basic type (switch from !hasName(x) to isTypeLit(x)
in unifier.go). This makes the case in issue #53650 work out.
See the comment in the code for a detailed explanation of this
change.
2) When we unify against an unbound type parameter, we always
proceed with its core type (if any).
Again, see the comment in the code for a detailed explanation
of this change.
The remaining changes are comment and test adjustments. Because
the new logic now results in failing type inference where it
succeeded before or vice versa, and then instatiation or parameter
passing failed, a handful of error messages changed.
As desired, we still have the same number of errors for the same
programs.
Also, because type inference now produces different results, we
cannot easily compare against infer1 anymore (also infer1 won't
work correctly anymore due to the changes in the unifier). This
comparison (together with infer1) is now disabled.
Because some errors and their positions have changed, we need a
slightly larger error position tolerance for types2 (which produces
less accurate error positions than go/types). Hence the change in
types2/check_test.go.
Finally, because type inference is now slightly more relaxed,
issue #51139 doesn't produce a type unification failure anymore
for a (previously correctly) inferred type argument.
Fixes#51139.
Change-Id: Id796eea42f1b706a248843ad855d9d429d077bd1
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The assertion here was to make sure the newly constructed and
typechecked expression selected the same receiver-qualified method,
but in the case of anonymous receiver types we can actually end up
with separate types.Field instances corresponding to each types.Type
instance. In that case, the assertion spuriously failed.
The fix here is to relax and assertion and just compare the method's
name and type (including receiver type).
Fixes#58563.
Change-Id: I67d51ddb020e6ed52671473c93fc08f283a40886
Reviewed-on: https://go-review.googlesource.com/c/go/+/471676
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Since we can't gate tests on the macOS version on normal machines,
restrict TestIssue51759 to only run on builders, where we have a way to
do this.
Change-Id: I70fc83c587689b499b6a38864973a77bb3e52596
Reviewed-on: https://go-review.googlesource.com/c/go/+/472619
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Roland Shoemaker <roland@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
The -T flag actually means the start address of text symbols, not
the text sections, which may differ by the header size. It has
been behaving like this since at least 2009. Make it clear in the
documentation.
Also remove the -D flag from the doc. The flag doesn't actually
exist in the implementation.
Fixes#58727.
Change-Id: Ic5b7e93adca3f1ff9f0de33dbb6089f46cdf4738
Reviewed-on: https://go-review.googlesource.com/c/go/+/472356
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
Convert TestUnknownAuthorityError to use subtests, avoiding continuing
the test after an unrecoverable failure.
Skip TestIssue51759 on pre-macOS 11 builders, which don't enforce the
behavior we were testing for.
Updates #58791Fixes#58812
Change-Id: I4e3e5bc371aa139d38052184c8232f8cb564138f
Reviewed-on: https://go-review.googlesource.com/c/go/+/472496
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Roland Shoemaker <roland@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
The existing runtime/coverage API set includes a "ClearCounters()"
function that zeros out the counter values in a running process so as
enable capturing of a coverage profile from a specific execution time
segment. Calling this function is only permitted if the program is
built with "-covermode=atomic", due (in part) to concerns about
processors with relaxed memory models in which normal stores can be
reordered.
In the bug in question, a test that stresses a different set of
counter-related APIs was hitting an invalid counter segment when
running on a machine (ppc64) which does indeed have a relaxed memory
consistency model.
From a post-mortem examination of the counter array for the harness
from the ppc64 test run, it was clear that the thread reading values
from the counter array was seeing the sort of inconsistency that could
result from stores being reordered (specifically the prolog
"packageID" and "number-of-counters" stores).
To preclude the possibility of future similar problems, this patch
extends the "atomic mode only" restriction from ClearCounters to the
other APIs that deal with counters (WriteCounters, WriteCountersDir).
Fixes#56197.
Change-Id: Idb85d67a84d69ead508e0902ab46ab4dc82af466
Reviewed-on: https://go-review.googlesource.com/c/go/+/463695
Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
All amd64 OSes already make use of the NOFRAME flag wherever is
required, so we can remove the frameless nosplit functions heuristic
code path.
Updates #58378
Change-Id: I966970693ba07f8c66da0aca83c23caad7cbbfe5
Reviewed-on: https://go-review.googlesource.com/c/go/+/466458
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Quim Muntal <quimmuntal@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
A build constraint reports whether the test binary was compiled with
cgo enabled, but that doesn't necessarily imply that cgo can be used
in the environment in which the test binary is run.
In particular, cross-compiled builders (such as Android) may compile
the test binaries on the host with CGO enabled but not provide a C
toolchain on the device that runs the test.
For #58775.
Change-Id: Ibf2f44c9e956cd3fa898c3de67af4449e8ef2dd1
Reviewed-on: https://go-review.googlesource.com/c/go/+/472215
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Bryan Mills <bcmills@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
This CL marks some plan9 assembly functions as NOFRAME to avoid
relying on the implicit amd64 NOFRAME heuristic, where NOSPLIT functions
without stack were also marked as NOFRAME.
Updates #58378
Change-Id: Ic8c9ab5c1a0897bebc6c1419ddc903a7492a1b0a
Reviewed-on: https://go-review.googlesource.com/c/go/+/466457
TryBot-Bypass: Quim Muntal <quimmuntal@gmail.com>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
This CL removes some NOFRAME flags on Windows assembly files
for several reasons:
- windows/386 does not use a frame pointer
- Leaf frameless functions already skip the frame pointer
- Some non-leaf functions do not contain enough dragons to justify
not using the frame pointer
Updates #58378
Change-Id: I31e71bf7f769e1957a4adba91778da5af66ce1e4
Reviewed-on: https://go-review.googlesource.com/c/go/+/466835
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Run-TryBot: Quim Muntal <quimmuntal@gmail.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
