Also use type assertions in a more defensive
way (check for != nil rather than ok).
LGTM=dsymonds, adonovan
R=adonovan, dsymonds
CC=golang-codereviews
https://golang.org/cl/169480043
This is an algorithm for callgraph construction that is faster
but much less precise than pointer analysis.
(I evaluated this for the Go Oracle last year but shelved it,
but it's a natural fit for the work Brian is doing on
automatic program minimization.)
LGTM=sameer
R=gri, crawshaw, sameer
CC=bwkster, golang-codereviews
https://golang.org/cl/124690043
Rewrite performed with this command:
sed -i '' 's_code.google.com/p/go\._golang.org/x/_g' \
$(grep -lr 'code.google.com/p/go.' *)
LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/170920043
See regression test for explanation.
I audited the code for similar issues and found none.
Many thanks to Daniel Morsing for providing a small
reproducible test case, a rarity for PTA bugs!
Fixesgolang/go#9002
LGTM=crawshaw
R=crawshaw
CC=daniel.morsing, golang-codereviews
https://golang.org/cl/163350043
Also removes a potential race condition regarding the
used flag of Var objects when type-checking packages
concurrently.
Implementation: Rather than marking all used dot-imported
objects and then deduce which corresponding package was used,
now we consider all dot-imported packages as unused and remove
each package from the unused packages map as objects are used.
Now only objects that can be marked as used have a used field
(variables, labels, and packages).
As a result, the code became cleaner and simpler.
Fixesgolang/go#8969.
LGTM=adonovan
R=adonovan
CC=golang-codereviews
https://golang.org/cl/163740043
The previous logic would descend into (e.g.) .git repositories
and vendored packages with "_"-prefixed names.
Fixesgolang/go#8907
LGTM=gri
R=gri
CC=golang-codereviews, shurcool
https://golang.org/cl/157800043
The type-checker depended on (token.Pos) position information of
the presented files to determine source order. That information
is determined by the parse order of the files rather than the
order in which the files are presented to the type-checker.
Introduced an order number strictly determined by the file
order as presented to the type-checker and the AST structure
of each file; thus providing source order information even in
the absence of (token.Pos) position information.
Added test case (provided by adonovan).
LGTM=adonovan
R=adonovan
CC=golang-codereviews
https://golang.org/cl/151160043
- ParseFile (core of go/loader's parseFiles(); also used by refactor/rename)
- ContainingPackage (core of Oracle's guessImportPath; also used by refactor/rename)
- Accessors for effective "methods" of build.Context:
FileExists, OpenFile, IsAbsPath, JoinPath.
LGTM=sameer
R=dave, sameer
CC=golang-codereviews, gri
https://golang.org/cl/146120043
The needMethods cache logic was wrong: it would treat any
previous call as a cache hit, even if 'skip' was true for that
call. As a result it could fail to generate methods for some
'skip' types, i.e. anonymous structs.
LGTM=gri
R=gri
CC=golang-codereviews
https://golang.org/cl/144750043
This CL is the first refactoring automated by "gorename". :)
Though I had to update the comments and run 'hg gofmt'. :(
LGTM=gri
R=gri
CC=golang-codereviews
https://golang.org/cl/142930043
It now has a main() function, which was confusing the logic to find the entry point.
LGTM=gri
R=gri
CC=golang-codereviews
https://golang.org/cl/142860044
This function has been copied at least 6 times throughout
go.tools. This implementation is superior since it does
all I/O through the virtualized go/build file system, and it
is highly parallel (and much faster).
We expose two flavours, simple (for existing tests) and
parallel (for high-performance tools such as gorename).
This CL creates the go/buildutil package, which is intended for
utilities related to go/build.
+ test.
LGTM=gri
R=gri
CC=golang-codereviews
https://golang.org/cl/137430043
- for unused packages where base(package path) != package name
- for conflicts between imported packages or dot-imported objects
and local declarations
Per suggestions from adonovan, inspired by the gc error messages.
LGTM=adonovan
R=adonovan, bradfitz
CC=golang-codereviews
https://golang.org/cl/135550043
(godoc is excluded from this CL since it will continue to use
/src/pkg in its URL namespace, making the necessary cleanup
more subtle.)
LGTM=gri
R=gri
CC=golang-codereviews
https://golang.org/cl/141770043
Recent changes in the runtime caused the interpreter to call 'getg',
and it should never have gotten that far.
Also, delete bodies of "runtime" functions, since they're too magical.
This makes missing intrinsics cause very obvious failures.
LGTM=gri
R=gri
CC=golang-codereviews
https://golang.org/cl/135330043
It returns the value formerly returned by Pkg(), i.e. the imported package.
Pkg() now returns the package enclosing the import statement,
which is consistent with all other Objects.
Fixesgolang/go#8628.
LGTM=gri
R=gri
CC=golang-codereviews
https://golang.org/cl/136090043
Also: Added Config.Strict flag to enable type checker tests
beyond the Go 1 specification.
Fixesgolang/go#8561.
LGTM=adonovan
R=adonovan
CC=golang-codereviews
https://golang.org/cl/134050043
LookupFieldOrMethod now also decides whether a found
method is actually in the method set. Simplifies call
sites. Added corresponding API tests.
TODO (separate CL): Decide what the correct value for
the indirect result should be (as required for code
generation). For now, the result value for indirect
is unchanged from before if a field/method is found.
Fixesgolang/go#8584.
LGTM=adonovan
R=adonovan
CC=golang-codereviews
https://golang.org/cl/132260043
(1) support Example functions defined in programs that don't
import "testing". We emit code to testmain.main() to call
them directly, since we can't call testing.Main.
(2) expose a FindTests function which reports the set of
Test, Example and Benchmark functions it finds.
Certain clients need this.
Added test for logic in FindTests.
LGTM=gri
R=gri
CC=golang-codereviews
https://golang.org/cl/115290048
Previously these were recorded in the PackageInfo, but not
reported to the user's error handler (types.Config.Error),
which is typically what prints them.
Minor subtlety: that function must now be able to handle error
values that are not of type types.Error.
+ Test (and renamed it).
LGTM=gri
R=gri
CC=golang-codereviews
https://golang.org/cl/121290043
- Break out parts of coverage.go into more specific files.
- Re-enable test of nil interface-to-interface conversion.
- Update initorder test to reflect spec ambiguity and gc vs go/types variance.
- Re-enable test dependent on now-fixed bug 8189 ("value,ok" yields an untyped bool)
LGTM=gri
R=gri
CC=golang-codereviews
https://golang.org/cl/119530043
And serialize the printing of each item with a mutex.
It is the formatted output of this tool, after all.
Also: minor doc tweaks.
LGTM=gri
R=gri
CC=golang-codereviews
https://golang.org/cl/114620044
Examples:
- "foo$1" becomes "pkg.foo$1"
- "init$1" (meaning the first declared "init" function) becomes "init#1",
to distinguish it from "init$1" (meaning the first anonymous function
within the synthetic "init" function that initializes package-level vars).
It is now an invariant that all source-level (non-synthetic)
functions have distinct names, and that all names include the
enclosing package. Added test for this.
+ updated various clients.
LGTM=gri
R=gri
CC=golang-codereviews
https://golang.org/cl/122750043
It was missing from the four conversions and the Make* instructions.
(Experiments with pure bytes.Buffer-based printing were not faster; various TODOs removed.)
LGTM=crawshaw
R=gri, crawshaw
CC=golang-codereviews
https://golang.org/cl/58040043
This transforms the virtualized directory (build.Context).Dir to a physical one,
for proprietary build systems that distinguish them.
LGTM=gri
R=gri
CC=golang-codereviews
https://golang.org/cl/116230043
Users need only add an extra file to the package to specify
additional imports and initialization steps in testmain, to
match their build system.
LGTM=gri
R=gri
CC=golang-codereviews
https://golang.org/cl/120090043
Without it, no value appears to be sent on NewTicker/NewTimer channels.
+ test
Also:
- add (callgraph.Edge).{Description,Pos} convenience methods
to simplify client code when Site==nil.
LGTM=gri
R=gri, friestein68503
CC=golang-codereviews
https://golang.org/cl/112610043
If an expression is addressable, we compute its address then load, rather than
extracting the value of subelements. For aggregates this avoids large copies.
Example:
var x [2]struct{y [3]int}
print(x[1].y[2])
Was:
t0 = local [3]struct{x [5]int} (x) *[3]struct{x [5]int}
t1 = *t0 [3]struct{x [5]int}
t2 = t1[1:int] struct{x [5]int}
t3 = t2.x [#0] [5]int
t4 = t3[2:int] int
Now:
t1 = &t0[1:int] *struct{x [5]int}
t2 = &t1.x [#0] *[5]int
t3 = &t2[2:int] *int
t4 = *t3 int
Also:
- make emitFieldSelections responsible for calling emitDebugRef, as
one of its two calls was forgetting to do it.
- relax the specification of (*Program).VarValue because not all
subexpressions are materalized as values now.
- fix up the objlookup.go test expectations to match.
go/ssa/interp test runs 10% faster.
Thanks to Peter Collingbourne for pointing this out.
LGTM=pcc
R=pcc, gri
CC=golang-codereviews
https://golang.org/cl/109710043
PackageInfo:
- deleted IsType
- inlined + deleted: ValueOf, TypeCaseVar, ImportSpecPkg
- on failure, TypeOf accessor now returns nil (was: panic)
go/ssa: avoid extra map lookups by using Uses or Defs directly when safe to do so,
and keeping the TypeAndValue around in expr0().
LGTM=gri
R=gri, pcc
CC=golang-codereviews
https://golang.org/cl/107650043
The InitOrder needs to be reset.
+ Test.
This bug manifested itself in duplicate HTML in the godoc -analysis view,
e.g. "f((x)" or "funcfunc f()"
LGTM=gri
R=gri
CC=golang-codereviews
https://golang.org/cl/107660044
This extends the sanity checker to identify and report referrers
which do not appear in the function's instruction lists, and fixes two
bugs in the lifting algorithm which were caught by the sanity check.
LGTM=adonovan
R=adonovan
CC=axwalk, golang-codereviews
https://golang.org/cl/110210045
We introduce a method (*Interface).Complete(), which is intended
to be called from clients after all embedded interfaces have been
fully defined. For importers, this will definitely be the case
after the import has finished, so each importer have been updated
to do so, with the exception of the gcimporter, which does not use
embedded interfaces, therefore Complete() can be called immediately
after construction.
Building the method set separately from the constructor type caused
some problems with go/importer, which copies the types.Interface
object, leading to there existing two almost-identical interface
types referenced from interface method receivers, only one of which
has been completed. To avoid this situation, the importer has been
modified to construct the interface object only once.
Fixesgolang/go#8177.
LGTM=gri
R=gri, dave, gordon.klaus, adonovan
CC=golang-codereviews
https://golang.org/cl/105060044
This method was deemed unfit for the API. See the original CL for discussion.
««« original CL description
go.tools/go/loader: Add Program.FilePath convenience method for getting the full path of a source file.
LGTM=gri
R=gri, adonovan
CC=golang-codereviews
https://golang.org/cl/107160049
»»»
LGTM=gri
R=gri, adonovan
CC=golang-codereviews
https://golang.org/cl/107570043
This builtin is a little weird in this form as it is (to my knowledge)
the only function that takes a variadic argument of non-slice
type. The language provides no syntax to express this, so we pick
a stringification for such arguments that does not appear in the
language. Specifically, use T... instead of ...T to distinguish it
from the normal case where the type is a slice.
This change lets the go/ssa package produce more efficient IR by
avoiding an extra conversion of the second argument.
LGTM=gri
R=gri
CC=adonovan, golang-codereviews
https://golang.org/cl/108230044
+ regression test.
Fixesgolang/go#8172
Also: return error (not panic) when called with empty input.
LGTM=gri
R=crawshaw, gri
CC=golang-codereviews, jon
https://golang.org/cl/104270043
Clients such as compilers need this information in order
to correctly link against imported packages.
This also adds support for the condensed import data format
where the priority information is stored as a suffix of the
condensed import data, as well as support for archive files.
LGTM=gri
R=gri
CC=golang-codereviews, iant
https://golang.org/cl/78740043
Bare init functions omit calls to dependent init functions and the
use of an init guard. They are useful in cases where the client uses
a different calling convention for init functions, or cases where
it is easier for a client to analyze bare init functions.
LGTM=adonovan
R=adonovan
CC=golang-codereviews, iant
https://golang.org/cl/78780043
This reduces solver time by about 40%.
See hvn.go for detailed description.
Also in this CL:
- Update package docs.
- Added various global opt/debug options for maintainer convenience.
- Added logging of phase timing.
- Added stdlib_test, disabled by default, that runs the analysis
on all tests in $GOROOT.
- include types when dumping solution
LGTM=crawshaw
R=crawshaw, dannyb
CC=golang-codereviews
https://golang.org/cl/96650048
New invariant: all user-defined objects have an associated package.
Added a check of this invariant to stdlib_test.
LGTM=gri
R=gri
CC=golang-codereviews
https://golang.org/cl/104170043
Previously, statements such as:
type T struct { a, b int }
[...]
x = T{}
x = T{b: 1}
would only affect the aggregate members mentioned in the composite
literal and leave the other members unchanged. This change causes us
to write a zero value to the target in cases where the target is not
already known to hold a zero value and the number of initializers in
the composite literal differs from the number of elements in its type.
Author: Peter Collingbourne. (hg clpatch got confused)
LGTM=pcc
R=pcc
CC=golang-codereviews
https://golang.org/cl/107980045
Godoc depends on this package.
Packages that use unsafe cannot be deployed to App Engine.
Packages that use reflect can.
This package needn't use unsafe, so don't.
LGTM=adonovan, rsc
R=rsc, adonovan
CC=golang-codereviews
https://golang.org/cl/105960043
Also, define ssa:wrapnilchk intrinsic to check and gracefully
fail when a T method is dynamically invoked via a nil *T receiver.
+ Test.
A follow-up CL will add another intrinsic, ssa:memclr.
+ minor cleanups.
LGTM=gri
R=gri
CC=golang-codereviews
https://golang.org/cl/101170044
It is easier for clients to recover from panics if the recover block
is always present. Otherwise, the client has to work around the lack
of a recover block by synthesizing a zero value return.
LGTM=adonovan
R=adonovan
CC=golang-codereviews
https://golang.org/cl/87210044
Before, Load() would just fail. Now, it gathers all frontend
errors (not just the first go/types error) in PackageInfo.Errors.
There are still cases where Load() can fail hard, e.g. errors in x_test.go
files. That case is trickier to fix and remains a TODO item.
Also, make godoc display all scanner/parser/type errors in the source view.
LGTM=gri
R=gri
CC=golang-codereviews
https://golang.org/cl/108940043
Blocks dominated by "if false" should be retained in the
initial SSA form so they remain visible to subsequent source
code analysis tools.
In any case, true compilers already need a stronger version of
this optimization so they can simplify CFGs such as this:
const x, y = ...
switch x {case y:...}
where a branch is constant but the comparison of constants
does not occur within an expression.
LGTM=gri
R=gri
CC=golang-codereviews, pcc
https://golang.org/cl/101250043
Alan Donovan
Robert Griesemer
Andrew Gerrand
Peter Collingbourne
Gordon Klaus
Aram Hăvărneanu
Alex Brainman