GCatch/

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README

GCatch: Automatically Detecting Concurrency Bugs in Go

Descriptions

GCatch contains a suite of static detectors aiming to identify concurrency bugs in large, real Go software systems. Concurrency bugs covered by the current version of GCatch include blocking misuse-of-channel (BMOC) bugs, deadlocks caused by misuse of mutexes (\eg, lock-with-unlock, double lock), races on struct fields, and races due to errors when using the testing package. The technical details of GCatch are presented in Section 3 of our ASPLOS paper [1].

Installation and Demonstration

GCatch leverages Z3 for constraint solving. If you have already installed Z3, you can use the install.sh script is to install GCatch. You can also install Z3 together with GCatch using the installZ3.sh script.

After the installation, you can run the run.sh script to execute GCatch on a buggy version of gRPC.

Directories

  1. Directory analysis contains static analysis routines shared by multiple checkers (e.g., computing post-dominator).

  2. Directory checkers contains code for implementing the checking functionalities.

  3. Directory cmd is the entry point of GCatch.

  4. Directory config contains configuration files of GCatch.

  5. Directory instinfo contains code for analyzing Go SSA instructions.

  6. Directory output contains code for printing the detection results.

  7. Directory path contains code for computation conducted on CFG.

  8. Directory ssabuild contains code for transforming input programs into SSA.

  9. Directory syncgraph contains code for interaction with call graph, alias analysis, and Z3.

  10. Directory testdata contains a buggy version of gRPC.

  11. Directory tests contains toy programs to test traditional checkers.

  12. Directory tools contains copies of external packages.

  13. Directory util contains utility code shared by different components of GCatch.

Please refer to the demonstration scripts to figure out how to use GCatch’s code.

Beta: build and check an application using go.mod

When we started this project, we didn't design to support programs with go.mod, mainly because the old applications that we evaluated GCatch on didn't support go.mod (actually some still don't support like docker).

This Beta version still requires you to build GCatch without go.mod, which can be done by install.sh. But once GCatch is compiled, you can use the following flags to require it to build and check one program using go.mod:

(1) -mod flag indicates that you want to build and check an application using go.mod

(2) -mod-abs-path flag gives the absolute path of the application. This path must include a correct go.mod file. E.g.: -mod-abs-path=/home/you/stubs/grpc-go, where grpc-go is directly cloned from github

(3) -mod-module-path flag gives the module path of the application. E.g.: -mod-module-path=google.golang.org/grpc

However, this Beta version lacks of testing and we still encourage you to use our traditional building way by GOPATH (more details are in run.sh).

Because our implementation of -r flag depends on GOPATH, this Beta version disables the -r flag so you can't recursively check applications in the subdirectories of the target application specified by -mod-abs-path. Note that it still checks dependencies of the target application


$ GCatch -mod -mod-abs-path /playground/kubernetes -mod-module-path k8s.io/kubernetes/staging/src/k8s.io/apimachinery/pkg/util/wait -compile-error

[1] Ziheng Liu, Shuofei Zhu, Boqin Qin, Hao Chen and Linhai Song. “Automatically Detecting and Fixing Concurrency Bugs in Go Software Systems.” In ASPLOS’2020.

Directories

Path Synopsis
pointer
checkers
bmoc
conflictinglock
doublelock
fatal
forgetunlock
structfield
cmd
GCatch
tests
conflict
double
unlock
tools
container/intsets
Package intsets provides Sparse, a compact and fast representation for sparse sets of int values.
 Package intsets provides Sparse, a compact and fast representation for sparse sets of int values.
github.com/aclements/go-z3/internal/ops
github.com/aclements/go-z3/st
Package st provides symbolic equivalents of basic Go types.
 Package st provides symbolic equivalents of basic Go types.
github.com/aclements/go-z3/z3
Package z3 checks the satisfiability of logical formulas.
 Package z3 checks the satisfiability of logical formulas.
github.com/aclements/go-z3/z3/z3log
Package z3log exposes Z3's interaction log.
 Package z3log exposes Z3's interaction log.
go/analysis
Package analysis defines the interface between a modular static analysis and an analysis driver program.
 Package analysis defines the interface between a modular static analysis and an analysis driver program.
go/analysis/analysistest
Package analysistest provides utilities for testing analyzers.
 Package analysistest provides utilities for testing analyzers.
go/analysis/internal/analysisflags
Package analysisflags defines helpers for processing flags of analysis driver tools.
 Package analysisflags defines helpers for processing flags of analysis driver tools.
go/analysis/internal/checker
Package checker defines the implementation of the checker commands.
 Package checker defines the implementation of the checker commands.
go/analysis/internal/facts
Package facts defines a serializable set of analysis.Fact.
 Package facts defines a serializable set of analysis.Fact.
go/analysis/multichecker
Package multichecker defines the main function for an analysis driver with several analyzers.
 Package multichecker defines the main function for an analysis driver with several analyzers.
go/analysis/passes/asmdecl
Package asmdecl defines an Analyzer that reports mismatches between assembly files and Go declarations.
 Package asmdecl defines an Analyzer that reports mismatches between assembly files and Go declarations.
go/analysis/passes/assign
Package assign defines an Analyzer that detects useless assignments.
 Package assign defines an Analyzer that detects useless assignments.
go/analysis/passes/atomic
Package atomic defines an Analyzer that checks for common mistakes using the sync/atomic package.
 Package atomic defines an Analyzer that checks for common mistakes using the sync/atomic package.
go/analysis/passes/atomicalign
Package atomicalign defines an Analyzer that checks for non-64-bit-aligned arguments to sync/atomic functions.
 Package atomicalign defines an Analyzer that checks for non-64-bit-aligned arguments to sync/atomic functions.
go/analysis/passes/bools
Package bools defines an Analyzer that detects common mistakes involving boolean operators.
 Package bools defines an Analyzer that detects common mistakes involving boolean operators.
go/analysis/passes/buildssa
Package buildssa defines an Analyzer that constructs the SSA representation of an error-free package and returns the set of all functions within it.
 Package buildssa defines an Analyzer that constructs the SSA representation of an error-free package and returns the set of all functions within it.
go/analysis/passes/buildtag
Package buildtag defines an Analyzer that checks build tags.
 Package buildtag defines an Analyzer that checks build tags.
go/analysis/passes/cgocall
Package cgocall defines an Analyzer that detects some violations of the cgo pointer passing rules.
 Package cgocall defines an Analyzer that detects some violations of the cgo pointer passing rules.
go/analysis/passes/composite
Package composite defines an Analyzer that checks for unkeyed composite literals.
 Package composite defines an Analyzer that checks for unkeyed composite literals.
go/analysis/passes/copylock
Package copylock defines an Analyzer that checks for locks erroneously passed by value.
 Package copylock defines an Analyzer that checks for locks erroneously passed by value.
go/analysis/passes/ctrlflow
Package ctrlflow is an analysis that provides a syntactic control-flow graph (CFG) for the body of a function.
 Package ctrlflow is an analysis that provides a syntactic control-flow graph (CFG) for the body of a function.
go/analysis/passes/deepequalerrors
Package deepequalerrors defines an Analyzer that checks for the use of reflect.DeepEqual with error values.
 Package deepequalerrors defines an Analyzer that checks for the use of reflect.DeepEqual with error values.
go/analysis/passes/errorsas
The errorsas package defines an Analyzer that checks that the second argument to errors.As is a pointer to a type implementing error.
 The errorsas package defines an Analyzer that checks that the second argument to errors.As is a pointer to a type implementing error.
go/analysis/passes/fieldalignment
Package fieldalignment defines an Analyzer that detects structs that would use less memory if their fields were sorted.
 Package fieldalignment defines an Analyzer that detects structs that would use less memory if their fields were sorted.
go/analysis/passes/fieldalignment/cmd/fieldalignment
go/analysis/passes/findcall
Package findcall defines an Analyzer that serves as a trivial example and test of the Analysis API.
 Package findcall defines an Analyzer that serves as a trivial example and test of the Analysis API.
go/analysis/passes/findcall/cmd/findcall
The findcall command runs the findcall analyzer.
 The findcall command runs the findcall analyzer.
go/analysis/passes/framepointer
Package framepointer defines an Analyzer that reports assembly code that clobbers the frame pointer before saving it.
 Package framepointer defines an Analyzer that reports assembly code that clobbers the frame pointer before saving it.
go/analysis/passes/httpresponse
Package httpresponse defines an Analyzer that checks for mistakes using HTTP responses.
 Package httpresponse defines an Analyzer that checks for mistakes using HTTP responses.
go/analysis/passes/ifaceassert
Package ifaceassert defines an Analyzer that flags impossible interface-interface type assertions.
 Package ifaceassert defines an Analyzer that flags impossible interface-interface type assertions.
go/analysis/passes/ifaceassert/cmd/ifaceassert
The ifaceassert command runs the ifaceassert analyzer.
 The ifaceassert command runs the ifaceassert analyzer.
go/analysis/passes/inspect
Package inspect defines an Analyzer that provides an AST inspector (github.com/system-pclub/GCatch/GCatch/tools/go/ast/inspector.Inspector) for the syntax trees of a package.
 Package inspect defines an Analyzer that provides an AST inspector (github.com/system-pclub/GCatch/GCatch/tools/go/ast/inspector.Inspector) for the syntax trees of a package.
go/analysis/passes/internal/analysisutil
Package analysisutil defines various helper functions used by two or more packages beneath go/analysis.
 Package analysisutil defines various helper functions used by two or more packages beneath go/analysis.
go/analysis/passes/loopclosure
Package loopclosure defines an Analyzer that checks for references to enclosing loop variables from within nested functions.
 Package loopclosure defines an Analyzer that checks for references to enclosing loop variables from within nested functions.
go/analysis/passes/lostcancel
Package lostcancel defines an Analyzer that checks for failure to call a context cancellation function.
 Package lostcancel defines an Analyzer that checks for failure to call a context cancellation function.
go/analysis/passes/lostcancel/cmd/lostcancel
The lostcancel command applies the github.com/system-pclub/GCatch/GCatch/tools/go/analysis/passes/lostcancel analysis to the specified packages of Go source code.
 The lostcancel command applies the github.com/system-pclub/GCatch/GCatch/tools/go/analysis/passes/lostcancel analysis to the specified packages of Go source code.
go/analysis/passes/nilfunc
Package nilfunc defines an Analyzer that checks for useless comparisons against nil.
 Package nilfunc defines an Analyzer that checks for useless comparisons against nil.
go/analysis/passes/nilness
Package nilness inspects the control-flow graph of an SSA function and reports errors such as nil pointer dereferences and degenerate nil pointer comparisons.
 Package nilness inspects the control-flow graph of an SSA function and reports errors such as nil pointer dereferences and degenerate nil pointer comparisons.
go/analysis/passes/nilness/cmd/nilness
The nilness command applies the github.com/system-pclub/GCatch/GCatch/tools/go/analysis/passes/nilness analysis to the specified packages of Go source code.
 The nilness command applies the github.com/system-pclub/GCatch/GCatch/tools/go/analysis/passes/nilness analysis to the specified packages of Go source code.
go/analysis/passes/pkgfact
The pkgfact package is a demonstration and test of the package fact mechanism.
 The pkgfact package is a demonstration and test of the package fact mechanism.
go/analysis/passes/printf
Package printf defines an Analyzer that checks consistency of Printf format strings and arguments.
 Package printf defines an Analyzer that checks consistency of Printf format strings and arguments.
go/analysis/passes/reflectvaluecompare
Package reflectvaluecompare defines an Analyzer that checks for accidentally using == or reflect.DeepEqual to compare reflect.Value values.
 Package reflectvaluecompare defines an Analyzer that checks for accidentally using == or reflect.DeepEqual to compare reflect.Value values.
go/analysis/passes/shadow
Package shadow defines an Analyzer that checks for shadowed variables.
 Package shadow defines an Analyzer that checks for shadowed variables.
go/analysis/passes/shadow/cmd/shadow
The shadow command runs the shadow analyzer.
 The shadow command runs the shadow analyzer.
go/analysis/passes/shift
Package shift defines an Analyzer that checks for shifts that exceed the width of an integer.
 Package shift defines an Analyzer that checks for shifts that exceed the width of an integer.
go/analysis/passes/sigchanyzer
Package sigchanyzer defines an Analyzer that detects misuse of unbuffered signal as argument to signal.Notify.
 Package sigchanyzer defines an Analyzer that detects misuse of unbuffered signal as argument to signal.Notify.
go/analysis/passes/sortslice
Package sortslice defines an Analyzer that checks for calls to sort.Slice that do not use a slice type as first argument.
 Package sortslice defines an Analyzer that checks for calls to sort.Slice that do not use a slice type as first argument.
go/analysis/passes/stdmethods
Package stdmethods defines an Analyzer that checks for misspellings in the signatures of methods similar to well-known interfaces.
 Package stdmethods defines an Analyzer that checks for misspellings in the signatures of methods similar to well-known interfaces.
go/analysis/passes/stringintconv
Package stringintconv defines an Analyzer that flags type conversions from integers to strings.
 Package stringintconv defines an Analyzer that flags type conversions from integers to strings.
go/analysis/passes/stringintconv/cmd/stringintconv
The stringintconv command runs the stringintconv analyzer.
 The stringintconv command runs the stringintconv analyzer.
go/analysis/passes/structtag
Package structtag defines an Analyzer that checks struct field tags are well formed.
 Package structtag defines an Analyzer that checks struct field tags are well formed.
go/analysis/passes/testinggoroutine
go/analysis/passes/tests
Package tests defines an Analyzer that checks for common mistaken usages of tests and examples.
 Package tests defines an Analyzer that checks for common mistaken usages of tests and examples.
go/analysis/passes/unmarshal
The unmarshal package defines an Analyzer that checks for passing non-pointer or non-interface types to unmarshal and decode functions.
 The unmarshal package defines an Analyzer that checks for passing non-pointer or non-interface types to unmarshal and decode functions.
go/analysis/passes/unmarshal/cmd/unmarshal
The unmarshal command runs the unmarshal analyzer.
 The unmarshal command runs the unmarshal analyzer.
go/analysis/passes/unreachable
Package unreachable defines an Analyzer that checks for unreachable code.
 Package unreachable defines an Analyzer that checks for unreachable code.
go/analysis/passes/unsafeptr
Package unsafeptr defines an Analyzer that checks for invalid conversions of uintptr to unsafe.Pointer.
 Package unsafeptr defines an Analyzer that checks for invalid conversions of uintptr to unsafe.Pointer.
go/analysis/passes/unusedresult
Package unusedresult defines an analyzer that checks for unused results of calls to certain pure functions.
 Package unusedresult defines an analyzer that checks for unused results of calls to certain pure functions.
go/analysis/passes/unusedwrite
Package unusedwrite checks for unused writes to the elements of a struct or array object.
 Package unusedwrite checks for unused writes to the elements of a struct or array object.
go/analysis/passes/usesgenerics
Package usesgenerics defines an Analyzer that checks for usage of generic features added in Go 1.18.
 Package usesgenerics defines an Analyzer that checks for usage of generic features added in Go 1.18.
go/analysis/singlechecker
Package singlechecker defines the main function for an analysis driver with only a single analysis.
 Package singlechecker defines the main function for an analysis driver with only a single analysis.
go/analysis/unitchecker
The unitchecker package defines the main function for an analysis driver that analyzes a single compilation unit during a build.
 The unitchecker package defines the main function for an analysis driver that analyzes a single compilation unit during a build.
go/ast/astutil
Package astutil contains common utilities for working with the Go AST.
 Package astutil contains common utilities for working with the Go AST.
go/ast/inspector
Package inspector provides helper functions for traversal over the syntax trees of a package, including node filtering by type, and materialization of the traversal stack.
 Package inspector provides helper functions for traversal over the syntax trees of a package, including node filtering by type, and materialization of the traversal stack.
go/buildutil
Package buildutil provides utilities related to the go/build package in the standard library.
 Package buildutil provides utilities related to the go/build package in the standard library.
go/callgraph
Package callgraph defines the call graph and various algorithms and utilities to operate on it.
 Package callgraph defines the call graph and various algorithms and utilities to operate on it.
go/callgraph/cha
Package cha computes the call graph of a Go program using the Class Hierarchy Analysis (CHA) algorithm.
 Package cha computes the call graph of a Go program using the Class Hierarchy Analysis (CHA) algorithm.
go/callgraph/rta
This package provides Rapid Type Analysis (RTA) for Go, a fast algorithm for call graph construction and discovery of reachable code (and hence dead code) and runtime types.
 This package provides Rapid Type Analysis (RTA) for Go, a fast algorithm for call graph construction and discovery of reachable code (and hence dead code) and runtime types.
go/callgraph/static
Package static computes the call graph of a Go program containing only static call edges.
 Package static computes the call graph of a Go program containing only static call edges.
go/callgraph/vta
go/callgraph/vta/internal/trie
trie implements persistent Patricia trie maps.
 trie implements persistent Patricia trie maps.
go/cfg
Package cfg constructs a simple control-flow graph (CFG) of the statements and expressions within a single function.
 Package cfg constructs a simple control-flow graph (CFG) of the statements and expressions within a single function.
go/expect
Package expect provides support for interpreting structured comments in Go source code as test expectations.
 Package expect provides support for interpreting structured comments in Go source code as test expectations.
go/gccgoexportdata
Package gccgoexportdata provides functions for reading export data files containing type information produced by the gccgo compiler.
 Package gccgoexportdata provides functions for reading export data files containing type information produced by the gccgo compiler.
go/gcexportdata
Package gcexportdata provides functions for locating, reading, and writing export data files containing type information produced by the gc compiler.
 Package gcexportdata provides functions for locating, reading, and writing export data files containing type information produced by the gc compiler.
go/internal/cgo
go/internal/gccgoimporter
Package gccgoimporter implements Import for gccgo-generated object files.
 Package gccgoimporter implements Import for gccgo-generated object files.
go/internal/gcimporter
Package gcimporter provides various functions for reading gc-generated object files that can be used to implement the Importer interface defined by the Go 1.5 standard library package.
 Package gcimporter provides various functions for reading gc-generated object files that can be used to implement the Importer interface defined by the Go 1.5 standard library package.
go/internal/packagesdriver
Package packagesdriver fetches type sizes for go/packages and go/analysis.
 Package packagesdriver fetches type sizes for go/packages and go/analysis.
go/loader
Package loader loads a complete Go program from source code, parsing and type-checking the initial packages plus their transitive closure of dependencies.
 Package loader loads a complete Go program from source code, parsing and type-checking the initial packages plus their transitive closure of dependencies.
go/mypointer
Package pointer implements Andersen's analysis, an inclusion-based pointer analysis algorithm first described in (Andersen, 1994).
 Package pointer implements Andersen's analysis, an inclusion-based pointer analysis algorithm first described in (Andersen, 1994).
go/packages
Package packages loads Go packages for inspection and analysis.
 Package packages loads Go packages for inspection and analysis.
go/packages/gopackages
The gopackages command is a diagnostic tool that demonstrates how to use github.com/system-pclub/GCatch/GCatch/tools/go/packages to load, parse, type-check, and print one or more Go packages.
 The gopackages command is a diagnostic tool that demonstrates how to use github.com/system-pclub/GCatch/GCatch/tools/go/packages to load, parse, type-check, and print one or more Go packages.
go/packages/packagestest
Package packagestest creates temporary projects on disk for testing go tools on.
 Package packagestest creates temporary projects on disk for testing go tools on.
go/pointer
Package pointer implements Andersen's analysis, an inclusion-based pointer analysis algorithm first described in (Andersen, 1994).
 Package pointer implements Andersen's analysis, an inclusion-based pointer analysis algorithm first described in (Andersen, 1994).
go/ssa
Package ssa defines a representation of the elements of Go programs (packages, types, functions, variables and constants) using a static single-assignment (SSA) form intermediate representation (IR) for the bodies of functions.
 Package ssa defines a representation of the elements of Go programs (packages, types, functions, variables and constants) using a static single-assignment (SSA) form intermediate representation (IR) for the bodies of functions.
go/ssa/interp
Package ssa/interp defines an interpreter for the SSA representation of Go programs.
 Package ssa/interp defines an interpreter for the SSA representation of Go programs.
go/ssa/ssautil
go/types/objectpath
Package objectpath defines a naming scheme for types.Objects (that is, named entities in Go programs) relative to their enclosing package.
 Package objectpath defines a naming scheme for types.Objects (that is, named entities in Go programs) relative to their enclosing package.
go/types/typeutil
Package typeutil defines various utilities for types, such as Map, a mapping from types.Type to interface{} values.
 Package typeutil defines various utilities for types, such as Map, a mapping from types.Type to interface{} values.
go/vcs
Package vcs exposes functions for resolving import paths and using version control systems, which can be used to implement behavior similar to the standard "go get" command.
 Package vcs exposes functions for resolving import paths and using version control systems, which can be used to implement behavior similar to the standard "go get" command.
internal/analysisinternal
Package analysisinternal exposes internal-only fields from go/analysis.
 Package analysisinternal exposes internal-only fields from go/analysis.
internal/apidiff
internal/event
Package event provides a set of packages that cover the main concepts of telemetry in an implementation agnostic way.
 Package event provides a set of packages that cover the main concepts of telemetry in an implementation agnostic way.
internal/event/core
Package core provides support for event based telemetry.
 Package core provides support for event based telemetry.
internal/event/export
internal/event/export/eventtest
Package eventtest supports logging events to a test.
 Package eventtest supports logging events to a test.
internal/event/export/metric
Package metric aggregates events into metrics that can be exported.
 Package metric aggregates events into metrics that can be exported.
internal/event/export/ocagent
Package ocagent adds the ability to export all telemetry to an ocagent.
 Package ocagent adds the ability to export all telemetry to an ocagent.
internal/event/export/ocagent/wire
internal/event/export/prometheus
internal/event/keys
internal/event/label
internal/fakenet
internal/fastwalk
Package fastwalk provides a faster version of filepath.Walk for file system scanning tools.
 Package fastwalk provides a faster version of filepath.Walk for file system scanning tools.
internal/gocommand
Package gocommand is a helper for calling the go command.
 Package gocommand is a helper for calling the go command.
internal/gopathwalk
Package gopathwalk is like filepath.Walk but specialized for finding Go packages, particularly in $GOPATH and $GOROOT.
 Package gopathwalk is like filepath.Walk but specialized for finding Go packages, particularly in $GOPATH and $GOROOT.
internal/imports
Package imports implements a Go pretty-printer (like package "go/format") that also adds or removes import statements as necessary.
 Package imports implements a Go pretty-printer (like package "go/format") that also adds or removes import statements as necessary.
internal/jsonrpc2
Package jsonrpc2 is a minimal implementation of the JSON RPC 2 spec.
 Package jsonrpc2 is a minimal implementation of the JSON RPC 2 spec.
internal/jsonrpc2/servertest
Package servertest provides utilities for running tests against a remote LSP server.
 Package servertest provides utilities for running tests against a remote LSP server.
internal/jsonrpc2_v2
Package jsonrpc2 is a minimal implementation of the JSON RPC 2 spec.
 Package jsonrpc2 is a minimal implementation of the JSON RPC 2 spec.
internal/lsp
Package lsp implements LSP for gopls.
 Package lsp implements LSP for gopls.
internal/lsp/analysis/fillreturns
Package fillreturns defines an Analyzer that will attempt to automatically fill in a return statement that has missing values with zero value elements.
 Package fillreturns defines an Analyzer that will attempt to automatically fill in a return statement that has missing values with zero value elements.
internal/lsp/analysis/fillstruct
Package fillstruct defines an Analyzer that automatically fills in a struct declaration with zero value elements for each field.
 Package fillstruct defines an Analyzer that automatically fills in a struct declaration with zero value elements for each field.
internal/lsp/analysis/infertypeargs
Package infertypeargs defines an analyzer that checks for explicit function arguments that could be inferred.
 Package infertypeargs defines an analyzer that checks for explicit function arguments that could be inferred.
internal/lsp/analysis/nonewvars
Package nonewvars defines an Analyzer that applies suggested fixes to errors of the type "no new variables on left side of :=".
 Package nonewvars defines an Analyzer that applies suggested fixes to errors of the type "no new variables on left side of :=".
internal/lsp/analysis/noresultvalues
Package noresultvalues defines an Analyzer that applies suggested fixes to errors of the type "no result values expected".
 Package noresultvalues defines an Analyzer that applies suggested fixes to errors of the type "no result values expected".
internal/lsp/analysis/simplifycompositelit
Package simplifycompositelit defines an Analyzer that simplifies composite literals.
 Package simplifycompositelit defines an Analyzer that simplifies composite literals.
internal/lsp/analysis/simplifyrange
Package simplifyrange defines an Analyzer that simplifies range statements.
 Package simplifyrange defines an Analyzer that simplifies range statements.
internal/lsp/analysis/simplifyslice
Package simplifyslice defines an Analyzer that simplifies slice statements.
 Package simplifyslice defines an Analyzer that simplifies slice statements.
internal/lsp/analysis/undeclaredname
Package undeclaredname defines an Analyzer that applies suggested fixes to errors of the type "undeclared name: %s".
 Package undeclaredname defines an Analyzer that applies suggested fixes to errors of the type "undeclared name: %s".
internal/lsp/analysis/unusedparams
Package unusedparams defines an analyzer that checks for unused parameters of functions.
 Package unusedparams defines an analyzer that checks for unused parameters of functions.
internal/lsp/analysis/useany
Package useany defines an Analyzer that checks for usage of interface{} in constraints, rather than the predeclared any.
 Package useany defines an Analyzer that checks for usage of interface{} in constraints, rather than the predeclared any.
internal/lsp/browser
Package browser provides utilities for interacting with users' browsers.
 Package browser provides utilities for interacting with users' browsers.
internal/lsp/cache
Package cache implements the caching layer for gopls.
 Package cache implements the caching layer for gopls.
internal/lsp/cmd
Package cmd handles the gopls command line.
 Package cmd handles the gopls command line.
internal/lsp/cmd/test
Package cmdtest contains the test suite for the command line behavior of gopls.
 Package cmdtest contains the test suite for the command line behavior of gopls.
internal/lsp/command
Package command defines the interface provided by gopls for the workspace/executeCommand LSP request.
 Package command defines the interface provided by gopls for the workspace/executeCommand LSP request.
internal/lsp/command/commandmeta
Package commandmeta provides metadata about LSP commands, by analyzing the command.Interface type.
 Package commandmeta provides metadata about LSP commands, by analyzing the command.Interface type.
internal/lsp/command/gen
Package gen is used to generate command bindings from the gopls command interface.
 Package gen is used to generate command bindings from the gopls command interface.
internal/lsp/debug
Package debug exports debug information for gopls.
 Package debug exports debug information for gopls.
internal/lsp/debug/log
Package log provides helper methods for exporting log events to the internal/event package.
 Package log provides helper methods for exporting log events to the internal/event package.
internal/lsp/debug/tag
Package tag provides the labels used for telemetry throughout gopls.
 Package tag provides the labels used for telemetry throughout gopls.
internal/lsp/diff
Package diff supports a pluggable diff algorithm.
 Package diff supports a pluggable diff algorithm.
internal/lsp/diff/difftest
Package difftest supplies a set of tests that will operate on any implementation of a diff algorithm as exposed by "github.com/system-pclub/GCatch/GCatch/tools/internal/lsp/diff"
 Package difftest supplies a set of tests that will operate on any implementation of a diff algorithm as exposed by "github.com/system-pclub/GCatch/GCatch/tools/internal/lsp/diff"
internal/lsp/diff/myers
Package myers implements the Myers diff algorithm.
 Package myers implements the Myers diff algorithm.
internal/lsp/fake
Package fake provides fake implementations of a text editor, LSP client plugin, and Sandbox environment for use in tests.
 Package fake provides fake implementations of a text editor, LSP client plugin, and Sandbox environment for use in tests.
internal/lsp/fuzzy
Package fuzzy implements a fuzzy matching algorithm.
 Package fuzzy implements a fuzzy matching algorithm.
internal/lsp/helper
Invoke with //go:generate helper/helper -t Server -d protocol/tsserver.go -u lsp -o server_gen.go invoke in internal/lsp
 Invoke with //go:generate helper/helper -t Server -d protocol/tsserver.go -u lsp -o server_gen.go invoke in internal/lsp
internal/lsp/lsppos
Package lsppos provides utilities for working with LSP positions.
 Package lsppos provides utilities for working with LSP positions.
internal/lsp/lsprpc
Package lsprpc implements a jsonrpc2.StreamServer that may be used to serve the LSP on a jsonrpc2 channel.
 Package lsprpc implements a jsonrpc2.StreamServer that may be used to serve the LSP on a jsonrpc2 channel.
internal/lsp/mod
Package mod provides core features related to go.mod file handling for use by Go editors and tools.
 Package mod provides core features related to go.mod file handling for use by Go editors and tools.
internal/lsp/progress
internal/lsp/protocol
Package protocol contains the structs that map directly to the wire format of the "Language Server Protocol".
 Package protocol contains the structs that map directly to the wire format of the "Language Server Protocol".
internal/lsp/regtest
Package regtest provides a framework for writing gopls regression tests.
 Package regtest provides a framework for writing gopls regression tests.
internal/lsp/snippet
Package snippet implements the specification for the LSP snippet format.
 Package snippet implements the specification for the LSP snippet format.
internal/lsp/source
Package source provides core features for use by Go editors and tools.
 Package source provides core features for use by Go editors and tools.
internal/lsp/source/completion
Package completion provides core functionality for code completion in Go editors and tools.
 Package completion provides core functionality for code completion in Go editors and tools.
internal/lsp/template
Package template contains code for dealing with templates
 Package template contains code for dealing with templates
internal/lsp/tests
Package tests exports functionality to be used across a variety of gopls tests.
 Package tests exports functionality to be used across a variety of gopls tests.
internal/memoize
Package memoize supports memoizing the return values of functions with idempotent results that are expensive to compute.
 Package memoize supports memoizing the return values of functions with idempotent results that are expensive to compute.
internal/mod/lazyregexp
Package lazyregexp is a thin wrapper over regexp, allowing the use of global regexp variables without forcing them to be compiled at init.
 Package lazyregexp is a thin wrapper over regexp, allowing the use of global regexp variables without forcing them to be compiled at init.
internal/mod/modfile
Package modfile implements a parser and formatter for go.mod files.
 Package modfile implements a parser and formatter for go.mod files.
internal/packagesinternal
Package packagesinternal exposes internal-only fields from go/packages.
 Package packagesinternal exposes internal-only fields from go/packages.
internal/proxydir
Package proxydir provides functions for writing module data to a directory in proxy format, so that it can be used as a module proxy by setting GOPROXY="file://<dir>".
 Package proxydir provides functions for writing module data to a directory in proxy format, so that it can be used as a module proxy by setting GOPROXY="file://<dir>".
internal/span
Package span contains support for representing with positions and ranges in text files.
 Package span contains support for representing with positions and ranges in text files.
internal/stack
Package stack provides support for parsing standard goroutine stack traces.
 Package stack provides support for parsing standard goroutine stack traces.
internal/stack/gostacks
The gostacks command processes stdin looking for things that look like stack traces and simplifying them to make the log more readable.
 The gostacks command processes stdin looking for things that look like stack traces and simplifying them to make the log more readable.
internal/stack/stacktest
internal/testenv
Package testenv contains helper functions for skipping tests based on which tools are present in the environment.
 Package testenv contains helper functions for skipping tests based on which tools are present in the environment.
internal/tool
Package tool is a harness for writing Go tools.
 Package tool is a harness for writing Go tools.
internal/typeparams
Package typeparams provides functions to work indirectly with type parameter data stored in go/ast and go/types objects, while these API are guarded by a build constraint.
 Package typeparams provides functions to work indirectly with type parameter data stored in go/ast and go/types objects, while these API are guarded by a build constraint.
internal/typeparams/genericfeatures
The genericfeatures package provides utilities for detecting usage of generic programming in Go packages.
 The genericfeatures package provides utilities for detecting usage of generic programming in Go packages.
internal/typesinternal
Package typesinternal provides access to internal go/types APIs that are not yet exported.
 Package typesinternal provides access to internal go/types APIs that are not yet exported.
internal/xcontext
Package xcontext is a package to offer the extra functionality we need from contexts that is not available from the standard context package.
 Package xcontext is a package to offer the extra functionality we need from contexts that is not available from the standard context package.
genKill

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