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-rw-r--r--tools/nogo/BUILD76
-rw-r--r--tools/nogo/README.md31
-rw-r--r--tools/nogo/analyzers.go131
-rw-r--r--tools/nogo/build.go30
-rw-r--r--tools/nogo/check/BUILD11
-rw-r--r--tools/nogo/check/main.go114
-rw-r--r--tools/nogo/config-schema.json97
-rw-r--r--tools/nogo/config.go261
-rw-r--r--tools/nogo/defs.bzl434
-rw-r--r--tools/nogo/filter/BUILD14
-rw-r--r--tools/nogo/filter/main.go134
-rw-r--r--tools/nogo/findings.go63
-rw-r--r--tools/nogo/nogo.go473
13 files changed, 0 insertions, 1869 deletions
diff --git a/tools/nogo/BUILD b/tools/nogo/BUILD
deleted file mode 100644
index 7976c7521..000000000
--- a/tools/nogo/BUILD
+++ /dev/null
@@ -1,76 +0,0 @@
-load("//tools:defs.bzl", "bzl_library", "go_library", "select_goarch", "select_goos")
-load("//tools/nogo:defs.bzl", "nogo_objdump_tool", "nogo_stdlib", "nogo_target")
-
-package(licenses = ["notice"])
-
-exports_files(["config-schema.json"])
-
-nogo_target(
- name = "target",
- goarch = select_goarch(),
- goos = select_goos(),
- visibility = ["//visibility:public"],
-)
-
-nogo_objdump_tool(
- name = "objdump_tool",
- visibility = ["//visibility:public"],
-)
-
-nogo_stdlib(
- name = "stdlib",
- visibility = ["//visibility:public"],
-)
-
-go_library(
- name = "nogo",
- srcs = [
- "analyzers.go",
- "build.go",
- "config.go",
- "findings.go",
- "nogo.go",
- ],
- nogo = False,
- visibility = ["//:sandbox"],
- deps = [
- "//tools/checkescape",
- "//tools/checkunsafe",
- "@co_honnef_go_tools//staticcheck:go_default_library",
- "@co_honnef_go_tools//stylecheck:go_default_library",
- "@org_golang_x_tools//go/analysis:go_default_library",
- "@org_golang_x_tools//go/analysis/internal/facts:go_default_library",
- "@org_golang_x_tools//go/analysis/passes/asmdecl:go_default_library",
- "@org_golang_x_tools//go/analysis/passes/assign:go_default_library",
- "@org_golang_x_tools//go/analysis/passes/atomic:go_default_library",
- "@org_golang_x_tools//go/analysis/passes/bools:go_default_library",
- "@org_golang_x_tools//go/analysis/passes/buildtag:go_default_library",
- "@org_golang_x_tools//go/analysis/passes/cgocall:go_default_library",
- "@org_golang_x_tools//go/analysis/passes/composite:go_default_library",
- "@org_golang_x_tools//go/analysis/passes/copylock:go_default_library",
- "@org_golang_x_tools//go/analysis/passes/errorsas:go_default_library",
- "@org_golang_x_tools//go/analysis/passes/httpresponse:go_default_library",
- "@org_golang_x_tools//go/analysis/passes/loopclosure:go_default_library",
- "@org_golang_x_tools//go/analysis/passes/lostcancel:go_default_library",
- "@org_golang_x_tools//go/analysis/passes/nilfunc:go_default_library",
- "@org_golang_x_tools//go/analysis/passes/nilness:go_default_library",
- "@org_golang_x_tools//go/analysis/passes/printf:go_default_library",
- "@org_golang_x_tools//go/analysis/passes/shadow:go_default_library",
- "@org_golang_x_tools//go/analysis/passes/shift:go_default_library",
- "@org_golang_x_tools//go/analysis/passes/stdmethods:go_default_library",
- "@org_golang_x_tools//go/analysis/passes/stringintconv:go_default_library",
- "@org_golang_x_tools//go/analysis/passes/structtag:go_default_library",
- "@org_golang_x_tools//go/analysis/passes/tests:go_default_library",
- "@org_golang_x_tools//go/analysis/passes/unmarshal:go_default_library",
- "@org_golang_x_tools//go/analysis/passes/unreachable:go_default_library",
- "@org_golang_x_tools//go/analysis/passes/unsafeptr:go_default_library",
- "@org_golang_x_tools//go/analysis/passes/unusedresult:go_default_library",
- "@org_golang_x_tools//go/gcexportdata:go_default_library",
- ],
-)
-
-bzl_library(
- name = "defs_bzl",
- srcs = ["defs.bzl"],
- visibility = ["//visibility:private"],
-)
diff --git a/tools/nogo/README.md b/tools/nogo/README.md
deleted file mode 100644
index 6e4db18de..000000000
--- a/tools/nogo/README.md
+++ /dev/null
@@ -1,31 +0,0 @@
-# Extended "nogo" analysis
-
-This package provides a build aspect that perform nogo analysis. This will be
-automatically injected to all relevant libraries when using the default
-`go_binary` and `go_library` rules.
-
-It exists for several reasons.
-
-* The default `nogo` provided by bazel is insufficient with respect to the
- possibility of binary analysis. This package allows us to analyze the
- generated binary in addition to using the standard analyzers.
-
-* The configuration provided in this package is much richer than the standard
- `nogo` JSON blob. Specifically, it allows us to exclude specific structures
- from the composite rules (such as the Ranges that are common with the set
- types).
-
-* The bazel version of `nogo` is run directly against the `go_library` and
- `go_binary` targets, meaning that any change to the configuration requires a
- rebuild from scratch (for some reason included all C++ source files in the
- process). Using an aspect is more efficient in this regard.
-
-* The checks supported by this package are exported as tests, which makes it
- easier to reason about and plumb into the build system.
-
-* For uninteresting reasons, it is impossible to integrate the default `nogo`
- analyzer provided by bazel with internal Google tooling. To provide a
- consistent experience, this package allows those systems to be unified.
-
-To use this package, import `nogo_test` from `defs.bzl` and add a single
-dependency which is a `go_binary` or `go_library` rule.
diff --git a/tools/nogo/analyzers.go b/tools/nogo/analyzers.go
deleted file mode 100644
index b919bc2f8..000000000
--- a/tools/nogo/analyzers.go
+++ /dev/null
@@ -1,131 +0,0 @@
-// Copyright 2019 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package nogo
-
-import (
- "encoding/gob"
-
- "golang.org/x/tools/go/analysis"
- "golang.org/x/tools/go/analysis/passes/asmdecl"
- "golang.org/x/tools/go/analysis/passes/assign"
- "golang.org/x/tools/go/analysis/passes/atomic"
- "golang.org/x/tools/go/analysis/passes/bools"
- "golang.org/x/tools/go/analysis/passes/buildtag"
- "golang.org/x/tools/go/analysis/passes/cgocall"
- "golang.org/x/tools/go/analysis/passes/composite"
- "golang.org/x/tools/go/analysis/passes/copylock"
- "golang.org/x/tools/go/analysis/passes/errorsas"
- "golang.org/x/tools/go/analysis/passes/httpresponse"
- "golang.org/x/tools/go/analysis/passes/loopclosure"
- "golang.org/x/tools/go/analysis/passes/lostcancel"
- "golang.org/x/tools/go/analysis/passes/nilfunc"
- "golang.org/x/tools/go/analysis/passes/nilness"
- "golang.org/x/tools/go/analysis/passes/printf"
- "golang.org/x/tools/go/analysis/passes/shadow"
- "golang.org/x/tools/go/analysis/passes/shift"
- "golang.org/x/tools/go/analysis/passes/stdmethods"
- "golang.org/x/tools/go/analysis/passes/stringintconv"
- "golang.org/x/tools/go/analysis/passes/structtag"
- "golang.org/x/tools/go/analysis/passes/tests"
- "golang.org/x/tools/go/analysis/passes/unmarshal"
- "golang.org/x/tools/go/analysis/passes/unreachable"
- "golang.org/x/tools/go/analysis/passes/unsafeptr"
- "golang.org/x/tools/go/analysis/passes/unusedresult"
- "honnef.co/go/tools/staticcheck"
- "honnef.co/go/tools/stylecheck"
-
- "gvisor.dev/gvisor/tools/checkescape"
- "gvisor.dev/gvisor/tools/checkunsafe"
-)
-
-// AllAnalyzers is a list of all available analyzers.
-var AllAnalyzers = []*analysis.Analyzer{
- asmdecl.Analyzer,
- assign.Analyzer,
- atomic.Analyzer,
- bools.Analyzer,
- buildtag.Analyzer,
- cgocall.Analyzer,
- composite.Analyzer,
- copylock.Analyzer,
- errorsas.Analyzer,
- httpresponse.Analyzer,
- loopclosure.Analyzer,
- lostcancel.Analyzer,
- nilfunc.Analyzer,
- nilness.Analyzer,
- printf.Analyzer,
- shift.Analyzer,
- stdmethods.Analyzer,
- stringintconv.Analyzer,
- shadow.Analyzer,
- structtag.Analyzer,
- tests.Analyzer,
- unmarshal.Analyzer,
- unreachable.Analyzer,
- unsafeptr.Analyzer,
- unusedresult.Analyzer,
- checkescape.Analyzer,
- checkunsafe.Analyzer,
-}
-
-// EscapeAnalyzers is a list of escape-related analyzers.
-var EscapeAnalyzers = []*analysis.Analyzer{
- checkescape.EscapeAnalyzer,
-}
-
-func register(all []*analysis.Analyzer) {
- // Register all fact types.
- //
- // N.B. This needs to be done recursively, because there may be
- // analyzers in the Requires list that do not appear explicitly above.
- registered := make(map[*analysis.Analyzer]struct{})
- var registerOne func(*analysis.Analyzer)
- registerOne = func(a *analysis.Analyzer) {
- if _, ok := registered[a]; ok {
- return
- }
-
- // Register dependencies.
- for _, da := range a.Requires {
- registerOne(da)
- }
-
- // Register local facts.
- for _, f := range a.FactTypes {
- gob.Register(f)
- }
-
- registered[a] = struct{}{} // Done.
- }
- for _, a := range all {
- registerOne(a)
- }
-}
-
-func init() {
- // Add all staticcheck analyzers.
- for _, a := range staticcheck.Analyzers {
- AllAnalyzers = append(AllAnalyzers, a)
- }
- // Add all stylecheck analyzers.
- for _, a := range stylecheck.Analyzers {
- AllAnalyzers = append(AllAnalyzers, a)
- }
-
- // Register lists.
- register(AllAnalyzers)
- register(EscapeAnalyzers)
-}
diff --git a/tools/nogo/build.go b/tools/nogo/build.go
deleted file mode 100644
index d173cff1f..000000000
--- a/tools/nogo/build.go
+++ /dev/null
@@ -1,30 +0,0 @@
-// Copyright 2019 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package nogo
-
-import (
- "fmt"
- "io"
- "os"
-)
-
-// findStdPkg needs to find the bundled standard library packages.
-func findStdPkg(GOOS, GOARCH, path string) (io.ReadCloser, error) {
- if path == "C" {
- // Cgo builds cannot be analyzed. Skip.
- return nil, ErrSkip
- }
- return os.Open(fmt.Sprintf("external/go_sdk/pkg/%s_%s/%s.a", GOOS, GOARCH, path))
-}
diff --git a/tools/nogo/check/BUILD b/tools/nogo/check/BUILD
deleted file mode 100644
index e18483a18..000000000
--- a/tools/nogo/check/BUILD
+++ /dev/null
@@ -1,11 +0,0 @@
-load("//tools:defs.bzl", "go_binary")
-
-package(licenses = ["notice"])
-
-go_binary(
- name = "check",
- srcs = ["main.go"],
- nogo = False,
- visibility = ["//visibility:public"],
- deps = ["//tools/nogo"],
-)
diff --git a/tools/nogo/check/main.go b/tools/nogo/check/main.go
deleted file mode 100644
index 69bdfe502..000000000
--- a/tools/nogo/check/main.go
+++ /dev/null
@@ -1,114 +0,0 @@
-// Copyright 2019 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Binary check is the nogo entrypoint.
-package main
-
-import (
- "encoding/json"
- "flag"
- "fmt"
- "io/ioutil"
- "log"
- "os"
-
- "gvisor.dev/gvisor/tools/nogo"
-)
-
-var (
- packageFile = flag.String("package", "", "package configuration file (in JSON format)")
- stdlibFile = flag.String("stdlib", "", "stdlib configuration file (in JSON format)")
- findingsOutput = flag.String("findings", "", "output file (or stdout, if not specified)")
- factsOutput = flag.String("facts", "", "output file for facts (optional)")
- escapesOutput = flag.String("escapes", "", "output file for escapes (optional)")
-)
-
-func loadConfig(file string, config interface{}) interface{} {
- // Load the configuration.
- f, err := os.Open(file)
- if err != nil {
- log.Fatalf("unable to open configuration %q: %v", file, err)
- }
- defer f.Close()
- dec := json.NewDecoder(f)
- dec.DisallowUnknownFields()
- if err := dec.Decode(config); err != nil {
- log.Fatalf("unable to decode configuration: %v", err)
- }
- return config
-}
-
-func main() {
- // Parse all flags.
- flag.Parse()
-
- var (
- findings []nogo.Finding
- factData []byte
- err error
- )
-
- // Check & load the configuration.
- if *packageFile != "" && *stdlibFile != "" {
- log.Fatalf("unable to perform stdlib and package analysis; provide only one!")
- }
-
- // Run the configuration.
- if *stdlibFile != "" {
- // Perform basic analysis.
- c := loadConfig(*stdlibFile, new(nogo.StdlibConfig)).(*nogo.StdlibConfig)
- findings, factData, err = nogo.CheckStdlib(c, nogo.AllAnalyzers)
-
- } else if *packageFile != "" {
- // Perform basic analysis.
- c := loadConfig(*packageFile, new(nogo.PackageConfig)).(*nogo.PackageConfig)
- findings, factData, err = nogo.CheckPackage(c, nogo.AllAnalyzers, nil)
-
- // Do we need to do escape analysis?
- if *escapesOutput != "" {
- escapes, _, err := nogo.CheckPackage(c, nogo.EscapeAnalyzers, nil)
- if err != nil {
- log.Fatalf("error performing escape analysis: %v", err)
- }
- if err := nogo.WriteFindingsToFile(escapes, *escapesOutput); err != nil {
- log.Fatalf("error writing escapes to %q: %v", *escapesOutput, err)
- }
- }
- } else {
- log.Fatalf("please provide at least one of package or stdlib!")
- }
-
- // Check that analysis was successful.
- if err != nil {
- log.Fatalf("error performing analysis: %v", err)
- }
-
- // Save facts.
- if *factsOutput != "" {
- if err := ioutil.WriteFile(*factsOutput, factData, 0644); err != nil {
- log.Fatalf("error saving findings to %q: %v", *factsOutput, err)
- }
- }
-
- // Write all findings.
- if *findingsOutput != "" {
- if err := nogo.WriteFindingsToFile(findings, *findingsOutput); err != nil {
- log.Fatalf("error writing findings to %q: %v", *findingsOutput, err)
- }
- } else {
- for _, finding := range findings {
- fmt.Fprintf(os.Stdout, "%s\n", finding.String())
- }
- }
-}
diff --git a/tools/nogo/config-schema.json b/tools/nogo/config-schema.json
deleted file mode 100644
index 3c25fe221..000000000
--- a/tools/nogo/config-schema.json
+++ /dev/null
@@ -1,97 +0,0 @@
-{
- "$schema": "http://json-schema.org/draft-07/schema",
- "definitions": {
- "group": {
- "type": "object",
- "properties": {
- "name": {
- "description": "The name of the group.",
- "type": "string"
- },
- "regex": {
- "description": "A regular expression for matching paths.",
- "type": "string"
- },
- "default": {
- "description": "Whether the group is enabled by default.",
- "type": "boolean"
- }
- },
- "required": [
- "name",
- "regex",
- "default"
- ],
- "additionalProperties": false
- },
- "regexlist": {
- "description": "A list of regular expressions.",
- "oneOf": [
- {
- "type": "array",
- "items": {
- "type": "string"
- }
- },
- {
- "type": "null"
- }
- ]
- },
- "rule": {
- "type": "object",
- "properties": {
- "exclude": {
- "description": "A regular expression for paths to exclude.",
- "$ref": "#/definitions/regexlist"
- },
- "suppress": {
- "description": "A regular expression for messages to suppress.",
- "$ref": "#/definitions/regexlist"
- }
- },
- "additionalProperties": false
- },
- "ruleList": {
- "type": "object",
- "additionalProperties": {
- "oneOf": [
- {
- "$ref": "#/definitions/rule"
- },
- {
- "type": "null"
- }
- ]
- }
- }
- },
- "properties": {
- "groups": {
- "description": "A definition of all groups.",
- "type": "array",
- "items": {
- "$ref": "#/definitions/group"
- },
- "minItems": 1
- },
- "global": {
- "description": "A global set of rules.",
- "type": "object",
- "additionalProperties": {
- "$ref": "#/definitions/rule"
- }
- },
- "analyzers": {
- "description": "A definition of all groups.",
- "type": "object",
- "additionalProperties": {
- "$ref": "#/definitions/ruleList"
- }
- }
- },
- "required": [
- "groups"
- ],
- "additionalProperties": false
-}
diff --git a/tools/nogo/config.go b/tools/nogo/config.go
deleted file mode 100644
index 2fea5b3e1..000000000
--- a/tools/nogo/config.go
+++ /dev/null
@@ -1,261 +0,0 @@
-// Copyright 2019 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package nogo
-
-import (
- "fmt"
- "regexp"
-)
-
-// GroupName is a named group.
-type GroupName string
-
-// AnalyzerName is a named analyzer.
-type AnalyzerName string
-
-// Group represents a named collection of files.
-type Group struct {
- // Name is the short name for the group.
- Name GroupName `yaml:"name"`
-
- // Regex matches all full paths in the group.
- Regex string `yaml:"regex"`
- regex *regexp.Regexp `yaml:"-"`
-
- // Default determines the default group behavior.
- //
- // If Default is true, all Analyzers are enabled for this
- // group. Otherwise, Analyzers must be individually enabled
- // by specifying a (possible empty) ItemConfig for the group
- // in the AnalyzerConfig.
- Default bool `yaml:"default"`
-}
-
-func (g *Group) compile() error {
- r, err := regexp.Compile(g.Regex)
- if err != nil {
- return err
- }
- g.regex = r
- return nil
-}
-
-// ItemConfig is an (Analyzer,Group) configuration.
-type ItemConfig struct {
- // Exclude are analyzer exclusions.
- //
- // Exclude is a list of regular expressions. If the corresponding
- // Analyzer emits a Finding for which Finding.Position.String()
- // matches a regular expression in Exclude, the finding will not
- // be reported.
- Exclude []string `yaml:"exclude,omitempty"`
- exclude []*regexp.Regexp `yaml:"-"`
-
- // Suppress are analyzer suppressions.
- //
- // Suppress is a list of regular expressions. If the corresponding
- // Analyzer emits a Finding for which Finding.Message matches a regular
- // expression in Suppress, the finding will not be reported.
- Suppress []string `yaml:"suppress,omitempty"`
- suppress []*regexp.Regexp `yaml:"-"`
-}
-
-func compileRegexps(ss []string, rs *[]*regexp.Regexp) error {
- *rs = make([]*regexp.Regexp, 0, len(ss))
- for _, s := range ss {
- r, err := regexp.Compile(s)
- if err != nil {
- return err
- }
- *rs = append(*rs, r)
- }
- return nil
-}
-
-func (i *ItemConfig) compile() error {
- if i == nil {
- // This may be nil if nothing is included in the
- // item configuration. That's fine, there's nothing
- // to compile and nothing to exclude & suppress.
- return nil
- }
- if err := compileRegexps(i.Exclude, &i.exclude); err != nil {
- return fmt.Errorf("in exclude: %w", err)
- }
- if err := compileRegexps(i.Suppress, &i.suppress); err != nil {
- return fmt.Errorf("in suppress: %w", err)
- }
- return nil
-}
-
-func (i *ItemConfig) merge(other *ItemConfig) {
- i.Exclude = append(i.Exclude, other.Exclude...)
- i.Suppress = append(i.Suppress, other.Suppress...)
-}
-
-func (i *ItemConfig) shouldReport(fullPos, msg string) bool {
- if i == nil {
- // See above.
- return true
- }
- for _, r := range i.exclude {
- if r.MatchString(fullPos) {
- return false
- }
- }
- for _, r := range i.suppress {
- if r.MatchString(msg) {
- return false
- }
- }
- return true
-}
-
-// AnalyzerConfig is the configuration for a single analyzers.
-//
-// This map is keyed by individual Group names, to allow for different
-// configurations depending on what Group the file belongs to.
-type AnalyzerConfig map[GroupName]*ItemConfig
-
-func (a AnalyzerConfig) compile() error {
- for name, gc := range a {
- if err := gc.compile(); err != nil {
- return fmt.Errorf("invalid group %q: %v", name, err)
- }
- }
- return nil
-}
-
-func (a AnalyzerConfig) merge(other AnalyzerConfig) {
- // Merge all the groups.
- for name, gc := range other {
- old, ok := a[name]
- if !ok || old == nil {
- a[name] = gc // Not configured in a.
- continue
- }
- old.merge(gc)
- }
-}
-
-func (a AnalyzerConfig) shouldReport(groupConfig *Group, fullPos, msg string) bool {
- gc, ok := a[groupConfig.Name]
- if !ok {
- return groupConfig.Default
- }
-
- // Note that if a section appears for a particular group
- // for a particular analyzer, then it will now be enabled,
- // and the group default no longer applies.
- return gc.shouldReport(fullPos, msg)
-}
-
-// Config is a nogo configuration.
-type Config struct {
- // Prefixes defines a set of regular expressions that
- // are standard "prefixes", so that files can be grouped
- // and specific rules applied to individual groups.
- Groups []Group `yaml:"groups"`
-
- // Global is the global analyzer config.
- Global AnalyzerConfig `yaml:"global"`
-
- // Analyzers are individual analyzer configurations. The
- // key for each analyzer is the name of the analyzer. The
- // value is either a boolean (enable/disable), or a map to
- // the groups above.
- Analyzers map[AnalyzerName]AnalyzerConfig `yaml:"analyzers"`
-}
-
-// Merge merges two configurations.
-func (c *Config) Merge(other *Config) {
- // Merge all groups.
- for _, g := range other.Groups {
- // Is there a matching group? If yes, we just delete
- // it. This will preserve the order provided in the
- // overriding file, even if it differs.
- for i := 0; i < len(c.Groups); i++ {
- if g.Name == c.Groups[i].Name {
- copy(c.Groups[i:], c.Groups[i+1:])
- c.Groups = c.Groups[:len(c.Groups)-1]
- break
- }
- }
- c.Groups = append(c.Groups, g)
- }
-
- // Merge global configurations.
- c.Global.merge(other.Global)
-
- // Merge all analyzer configurations.
- for name, ac := range other.Analyzers {
- old, ok := c.Analyzers[name]
- if !ok {
- c.Analyzers[name] = ac // No analyzer in original config.
- continue
- }
- old.merge(ac)
- }
-}
-
-// Compile compiles a configuration to make it useable.
-func (c *Config) Compile() error {
- for i := 0; i < len(c.Groups); i++ {
- if err := c.Groups[i].compile(); err != nil {
- return fmt.Errorf("invalid group %q: %w", c.Groups[i].Name, err)
- }
- }
- if err := c.Global.compile(); err != nil {
- return fmt.Errorf("invalid global: %w", err)
- }
- for name, ac := range c.Analyzers {
- if err := ac.compile(); err != nil {
- return fmt.Errorf("invalid analyzer %q: %w", name, err)
- }
- }
- return nil
-}
-
-// ShouldReport returns true iff the finding should match the Config.
-func (c *Config) ShouldReport(finding Finding) bool {
- fullPos := finding.Position.String()
-
- // Find the matching group.
- var groupConfig *Group
- for i := 0; i < len(c.Groups); i++ {
- if c.Groups[i].regex.MatchString(fullPos) {
- groupConfig = &c.Groups[i]
- break
- }
- }
-
- // If there is no group matching this path, then
- // we default to accept the finding.
- if groupConfig == nil {
- return true
- }
-
- // Suppress via global rule?
- if !c.Global.shouldReport(groupConfig, fullPos, finding.Message) {
- return false
- }
-
- // Try the analyzer config.
- ac, ok := c.Analyzers[finding.Category]
- if !ok {
- return groupConfig.Default
- }
- return ac.shouldReport(groupConfig, fullPos, finding.Message)
-}
diff --git a/tools/nogo/defs.bzl b/tools/nogo/defs.bzl
deleted file mode 100644
index 0c48a7a5a..000000000
--- a/tools/nogo/defs.bzl
+++ /dev/null
@@ -1,434 +0,0 @@
-"""Nogo rules."""
-
-load("//tools/bazeldefs:go.bzl", "go_context", "go_embed_libraries", "go_importpath", "go_rule")
-
-NogoConfigInfo = provider(
- "information about a nogo configuration",
- fields = {
- "srcs": "the collection of configuration files",
- },
-)
-
-def _nogo_config_impl(ctx):
- return [NogoConfigInfo(
- srcs = ctx.files.srcs,
- )]
-
-nogo_config = rule(
- implementation = _nogo_config_impl,
- attrs = {
- "srcs": attr.label_list(
- doc = "a list of yaml files (schema defined by tool/nogo/config.go).",
- allow_files = True,
- ),
- },
-)
-
-NogoTargetInfo = provider(
- "information about the Go target",
- fields = {
- "goarch": "the build architecture (GOARCH)",
- "goos": "the build OS target (GOOS)",
- },
-)
-
-def _nogo_target_impl(ctx):
- return [NogoTargetInfo(
- goarch = ctx.attr.goarch,
- goos = ctx.attr.goos,
- )]
-
-nogo_target = go_rule(
- rule,
- implementation = _nogo_target_impl,
- attrs = {
- "goarch": attr.string(
- doc = "the Go build architecture (propagated to other rules).",
- mandatory = True,
- ),
- "goos": attr.string(
- doc = "the Go OS target (propagated to other rules).",
- mandatory = True,
- ),
- },
-)
-
-def _nogo_objdump_tool_impl(ctx):
- # Construct the magic dump command.
- #
- # Note that in some cases, the input is being fed into the tool via stdin.
- # Unfortunately, the Go objdump tool expects to see a seekable file [1], so
- # we need the tool to handle this case by creating a temporary file.
- #
- # [1] https://github.com/golang/go/issues/41051
- nogo_target_info = ctx.attr._nogo_target[NogoTargetInfo]
- go_ctx = go_context(ctx, goos = nogo_target_info.goos, goarch = nogo_target_info.goarch)
- env_prefix = " ".join(["%s=%s" % (key, value) for (key, value) in go_ctx.env.items()])
- dumper = ctx.actions.declare_file(ctx.label.name)
- ctx.actions.write(dumper, "\n".join([
- "#!/bin/bash",
- "set -euo pipefail",
- "if [[ $# -eq 0 ]]; then",
- " T=$(mktemp -u -t libXXXXXX.a)",
- " cat /dev/stdin > ${T}",
- "else",
- " T=$1;",
- "fi",
- "%s %s tool objdump ${T}" % (
- env_prefix,
- go_ctx.go.path,
- ),
- "if [[ $# -eq 0 ]]; then",
- " rm -rf ${T}",
- "fi",
- "",
- ]), is_executable = True)
-
- # Include the full runfiles.
- return [DefaultInfo(
- runfiles = ctx.runfiles(files = go_ctx.runfiles.to_list()),
- executable = dumper,
- )]
-
-nogo_objdump_tool = go_rule(
- rule,
- implementation = _nogo_objdump_tool_impl,
- attrs = {
- "_nogo_target": attr.label(
- default = "//tools/nogo:target",
- cfg = "target",
- ),
- },
-)
-
-# NogoStdlibInfo is the set of standard library facts.
-NogoStdlibInfo = provider(
- "information for nogo analysis (standard library facts)",
- fields = {
- "facts": "serialized standard library facts",
- "raw_findings": "raw package findings (if relevant)",
- },
-)
-
-def _nogo_stdlib_impl(ctx):
- # Build the standard library facts.
- nogo_target_info = ctx.attr._nogo_target[NogoTargetInfo]
- go_ctx = go_context(ctx, goos = nogo_target_info.goos, goarch = nogo_target_info.goarch)
- facts = ctx.actions.declare_file(ctx.label.name + ".facts")
- raw_findings = ctx.actions.declare_file(ctx.label.name + ".raw_findings")
- config = struct(
- Srcs = [f.path for f in go_ctx.stdlib_srcs],
- GOOS = go_ctx.goos,
- GOARCH = go_ctx.goarch,
- Tags = go_ctx.tags,
- )
- config_file = ctx.actions.declare_file(ctx.label.name + ".cfg")
- ctx.actions.write(config_file, config.to_json())
- ctx.actions.run(
- inputs = [config_file] + go_ctx.stdlib_srcs,
- outputs = [facts, raw_findings],
- tools = depset(go_ctx.runfiles.to_list() + ctx.files._nogo_objdump_tool),
- executable = ctx.files._nogo_check[0],
- mnemonic = "NogoStandardLibraryAnalysis",
- progress_message = "Analyzing Go Standard Library",
- arguments = go_ctx.nogo_args + [
- "-objdump_tool=%s" % ctx.files._nogo_objdump_tool[0].path,
- "-stdlib=%s" % config_file.path,
- "-findings=%s" % raw_findings.path,
- "-facts=%s" % facts.path,
- ],
- )
-
- # Return the stdlib facts as output.
- return [NogoStdlibInfo(
- facts = facts,
- raw_findings = raw_findings,
- )]
-
-nogo_stdlib = go_rule(
- rule,
- implementation = _nogo_stdlib_impl,
- attrs = {
- "_nogo_check": attr.label(
- default = "//tools/nogo/check:check",
- cfg = "host",
- ),
- "_nogo_objdump_tool": attr.label(
- default = "//tools/nogo:objdump_tool",
- cfg = "host",
- ),
- "_nogo_target": attr.label(
- default = "//tools/nogo:target",
- cfg = "target",
- ),
- },
-)
-
-# NogoInfo is the serialized set of package facts for a nogo analysis.
-#
-# Each go_library rule will generate a corresponding nogo rule, which will run
-# with the source files as input. Note however, that the individual nogo rules
-# are simply stubs that enter into the shadow dependency tree (the "aspect").
-NogoInfo = provider(
- "information for nogo analysis",
- fields = {
- "facts": "serialized package facts",
- "raw_findings": "raw package findings (if relevant)",
- "escapes": "escape-only findings (if relevant)",
- "importpath": "package import path",
- "binaries": "package binary files",
- "srcs": "srcs (for go_test support)",
- "deps": "deps (for go_test support)",
- },
-)
-
-def _nogo_aspect_impl(target, ctx):
- # If this is a nogo rule itself (and not the shadow of a go_library or
- # go_binary rule created by such a rule), then we simply return nothing.
- # All work is done in the shadow properties for go rules. For a proto
- # library, we simply skip the analysis portion but still need to return a
- # valid NogoInfo to reference the generated binary.
- #
- # Note that we almost exclusively use go_library, not go_tool_library.
- # This is because nogo is manually annotated, so the go_tool_library kind
- # is not needed to avoid dependency loops. Unfortunately, bazel coverdata
- # is exported *only* as a go_tool_library. This does not cause a problem,
- # since there is guaranteed to be no conflict. However for consistency,
- # we should not introduce new go_tool_library dependencies unless strictly
- # necessary.
- if ctx.rule.kind in ("go_library", "go_tool_library", "go_binary", "go_test"):
- srcs = ctx.rule.files.srcs
- deps = ctx.rule.attr.deps
- elif ctx.rule.kind in ("go_proto_library", "go_wrap_cc"):
- srcs = []
- deps = ctx.rule.attr.deps
- else:
- return [NogoInfo()]
-
- # If we're using the "library" attribute, then we need to aggregate the
- # original library sources and dependencies into this target to perform
- # proper type analysis.
- for embed in go_embed_libraries(ctx.rule):
- info = embed[NogoInfo]
- if hasattr(info, "srcs"):
- srcs = srcs + info.srcs
- if hasattr(info, "deps"):
- deps = deps + info.deps
-
- # Start with all target files and srcs as input.
- inputs = target.files.to_list() + srcs
-
- # Generate a shell script that dumps the binary. Annoyingly, this seems
- # necessary as the context in which a run_shell command runs does not seem
- # to cleanly allow us redirect stdout to the actual output file. Perhaps
- # I'm missing something here, but the intermediate script does work.
- binaries = target.files.to_list()
- objfiles = [f for f in binaries if f.path.endswith(".a")]
- if len(objfiles) > 0:
- # Prefer the .a files for go_library targets.
- target_objfile = objfiles[0]
- else:
- # Use the raw binary for go_binary and go_test targets.
- target_objfile = binaries[0]
- inputs.append(target_objfile)
-
- # Extract the importpath for this package.
- if ctx.rule.kind == "go_test":
- # If this is a test, then it will not be imported by anything else.
- # We can safely set the importapth to just "test". Note that this
- # is necessary if the library also imports the core library (in
- # addition to including the sources directly), which happens in
- # some complex cases (seccomp_victim).
- importpath = "test"
- else:
- importpath = go_importpath(target)
-
- # Collect all info from shadow dependencies.
- fact_map = dict()
- import_map = dict()
- all_raw_findings = []
- for dep in deps:
- # There will be no file attribute set for all transitive dependencies
- # that are not go_library or go_binary rules, such as a proto rules.
- # This is handled by the ctx.rule.kind check above.
- info = dep[NogoInfo]
- if not hasattr(info, "facts"):
- continue
-
- # Configure where to find the binary & fact files. Note that this will
- # use .x and .a regardless of whether this is a go_binary rule, since
- # these dependencies must be go_library rules.
- x_files = [f.path for f in info.binaries if f.path.endswith(".x")]
- if not len(x_files):
- x_files = [f.path for f in info.binaries if f.path.endswith(".a")]
- import_map[info.importpath] = x_files[0]
- fact_map[info.importpath] = info.facts.path
-
- # Collect all findings; duplicates are resolved at the end.
- all_raw_findings.extend(info.raw_findings)
-
- # Ensure the above are available as inputs.
- inputs.append(info.facts)
- inputs += info.binaries
-
- # Add the standard library facts.
- stdlib_info = ctx.attr._nogo_stdlib[NogoStdlibInfo]
- stdlib_facts = stdlib_info.facts
- inputs.append(stdlib_facts)
-
- # The nogo tool operates on a configuration serialized in JSON format.
- nogo_target_info = ctx.attr._nogo_target[NogoTargetInfo]
- go_ctx = go_context(ctx, goos = nogo_target_info.goos, goarch = nogo_target_info.goarch)
- facts = ctx.actions.declare_file(target.label.name + ".facts")
- raw_findings = ctx.actions.declare_file(target.label.name + ".raw_findings")
- escapes = ctx.actions.declare_file(target.label.name + ".escapes")
- config = struct(
- ImportPath = importpath,
- GoFiles = [src.path for src in srcs if src.path.endswith(".go")],
- NonGoFiles = [src.path for src in srcs if not src.path.endswith(".go")],
- GOOS = go_ctx.goos,
- GOARCH = go_ctx.goarch,
- Tags = go_ctx.tags,
- FactMap = fact_map,
- ImportMap = import_map,
- StdlibFacts = stdlib_facts.path,
- )
- config_file = ctx.actions.declare_file(target.label.name + ".cfg")
- ctx.actions.write(config_file, config.to_json())
- inputs.append(config_file)
- ctx.actions.run(
- inputs = inputs,
- outputs = [facts, raw_findings, escapes],
- tools = depset(go_ctx.runfiles.to_list() + ctx.files._nogo_objdump_tool),
- executable = ctx.files._nogo_check[0],
- mnemonic = "NogoAnalysis",
- progress_message = "Analyzing %s" % target.label,
- arguments = go_ctx.nogo_args + [
- "-binary=%s" % target_objfile.path,
- "-objdump_tool=%s" % ctx.files._nogo_objdump_tool[0].path,
- "-package=%s" % config_file.path,
- "-findings=%s" % raw_findings.path,
- "-facts=%s" % facts.path,
- "-escapes=%s" % escapes.path,
- ],
- )
-
- # Flatten all findings from all dependencies.
- #
- # This is done because all the filtering must be done at the
- # top-level nogo_test to dynamically apply a configuration.
- # This does not actually add any additional work here, but
- # will simply propagate the full list of files.
- all_raw_findings = [stdlib_info.raw_findings] + depset(all_raw_findings).to_list() + [raw_findings]
-
- # Return the package facts as output.
- return [NogoInfo(
- facts = facts,
- raw_findings = all_raw_findings,
- escapes = escapes,
- importpath = importpath,
- binaries = binaries,
- srcs = srcs,
- deps = deps,
- )]
-
-nogo_aspect = go_rule(
- aspect,
- implementation = _nogo_aspect_impl,
- attr_aspects = [
- "deps",
- "library",
- "embed",
- ],
- attrs = {
- "_nogo_check": attr.label(
- default = "//tools/nogo/check:check",
- cfg = "host",
- ),
- "_nogo_stdlib": attr.label(
- default = "//tools/nogo:stdlib",
- cfg = "host",
- ),
- "_nogo_objdump_tool": attr.label(
- default = "//tools/nogo:objdump_tool",
- cfg = "host",
- ),
- "_nogo_target": attr.label(
- default = "//tools/nogo:target",
- cfg = "target",
- ),
- },
-)
-
-def _nogo_test_impl(ctx):
- """Check nogo findings."""
-
- # Ensure there's a single dependency.
- if len(ctx.attr.deps) != 1:
- fail("nogo_test requires exactly one dep.")
- raw_findings = ctx.attr.deps[0][NogoInfo].raw_findings
- escapes = ctx.attr.deps[0][NogoInfo].escapes
-
- # Build a step that applies the configuration.
- config_srcs = ctx.attr.config[NogoConfigInfo].srcs
- findings = ctx.actions.declare_file(ctx.label.name + ".findings")
- ctx.actions.run(
- inputs = raw_findings + ctx.files.srcs + config_srcs,
- outputs = [findings],
- tools = depset(ctx.files._filter),
- executable = ctx.files._filter[0],
- mnemonic = "GoStaticAnalysis",
- progress_message = "Generating %s" % ctx.label,
- arguments = ["-input=%s" % f.path for f in raw_findings] +
- ["-config=%s" % f.path for f in config_srcs] +
- ["-output=%s" % findings.path],
- )
-
- # Build a runner that checks the filtered facts.
- #
- # Note that this calls the filter binary without any configuration, so all
- # findings will be included. But this is expected, since we've already
- # filtered out everything that should not be included.
- runner = ctx.actions.declare_file(ctx.label.name)
- runner_content = [
- "#!/bin/bash",
- "exec %s -input=%s" % (ctx.files._filter[0].short_path, findings.short_path),
- "",
- ]
- ctx.actions.write(runner, "\n".join(runner_content), is_executable = True)
-
- return [DefaultInfo(
- # The runner just executes the filter again, on the
- # newly generated filtered findings. We still need
- # the filter tool as part of our runfiles, however.
- runfiles = ctx.runfiles(files = ctx.files._filter + [findings]),
- executable = runner,
- ), OutputGroupInfo(
- # Propagate the filtered filters, for consumption by
- # build tooling. Note that the build tooling typically
- # pays attention to the mnemoic above, so this must be
- # what is expected by the tooling.
- nogo_findings = depset([findings]),
- # Expose all escape analysis findings (see above).
- nogo_escapes = depset([escapes]),
- )]
-
-nogo_test = rule(
- implementation = _nogo_test_impl,
- attrs = {
- "config": attr.label(
- mandatory = True,
- doc = "A rule of kind nogo_config.",
- ),
- "deps": attr.label_list(
- aspects = [nogo_aspect],
- doc = "Exactly one Go dependency to be analyzed.",
- ),
- "srcs": attr.label_list(
- allow_files = True,
- doc = "Relevant src files. This is ignored except to make the nogo_test directly affected by the files.",
- ),
- "_filter": attr.label(default = "//tools/nogo/filter:filter"),
- },
- test = True,
-)
diff --git a/tools/nogo/filter/BUILD b/tools/nogo/filter/BUILD
deleted file mode 100644
index e56a783e2..000000000
--- a/tools/nogo/filter/BUILD
+++ /dev/null
@@ -1,14 +0,0 @@
-load("//tools:defs.bzl", "go_binary")
-
-package(licenses = ["notice"])
-
-go_binary(
- name = "filter",
- srcs = ["main.go"],
- nogo = False,
- visibility = ["//visibility:public"],
- deps = [
- "//tools/nogo",
- "@in_gopkg_yaml_v2//:go_default_library",
- ],
-)
diff --git a/tools/nogo/filter/main.go b/tools/nogo/filter/main.go
deleted file mode 100644
index 8be38ca6d..000000000
--- a/tools/nogo/filter/main.go
+++ /dev/null
@@ -1,134 +0,0 @@
-// Copyright 2019 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Binary check is the nogo entrypoint.
-package main
-
-import (
- "bytes"
- "flag"
- "fmt"
- "io/ioutil"
- "log"
- "os"
- "strings"
-
- yaml "gopkg.in/yaml.v2"
- "gvisor.dev/gvisor/tools/nogo"
-)
-
-type stringList []string
-
-func (s *stringList) String() string {
- return strings.Join(*s, ",")
-}
-
-func (s *stringList) Set(value string) error {
- *s = append(*s, value)
- return nil
-}
-
-var (
- inputFiles stringList
- configFiles stringList
- outputFile string
- showConfig bool
-)
-
-func init() {
- flag.Var(&inputFiles, "input", "findings input files")
- flag.StringVar(&outputFile, "output", "", "findings output file")
- flag.Var(&configFiles, "config", "findings configuration files")
- flag.BoolVar(&showConfig, "show-config", false, "dump configuration only")
-}
-
-func main() {
- flag.Parse()
-
- // Load all available findings.
- var findings []nogo.Finding
- for _, filename := range inputFiles {
- inputFindings, err := nogo.ExtractFindingsFromFile(filename)
- if err != nil {
- log.Fatalf("unable to extract findings from %s: %v", filename, err)
- }
- findings = append(findings, inputFindings...)
- }
-
- // Open and merge all configuations.
- config := &nogo.Config{
- Global: make(nogo.AnalyzerConfig),
- Analyzers: make(map[nogo.AnalyzerName]nogo.AnalyzerConfig),
- }
- for _, filename := range configFiles {
- content, err := ioutil.ReadFile(filename)
- if err != nil {
- log.Fatalf("unable to read %s: %v", filename, err)
- }
- var newConfig nogo.Config // For current file.
- dec := yaml.NewDecoder(bytes.NewBuffer(content))
- dec.SetStrict(true)
- if err := dec.Decode(&newConfig); err != nil {
- log.Fatalf("unable to decode %s: %v", filename, err)
- }
- config.Merge(&newConfig)
- if showConfig {
- content, err := yaml.Marshal(&newConfig)
- if err != nil {
- log.Fatalf("error marshalling config: %v", err)
- }
- mergedBytes, err := yaml.Marshal(config)
- if err != nil {
- log.Fatalf("error marshalling config: %v", err)
- }
- fmt.Fprintf(os.Stdout, "Loaded configuration from %s:\n%s\n", filename, string(content))
- fmt.Fprintf(os.Stdout, "Merged configuration:\n%s\n", string(mergedBytes))
- }
- }
- if err := config.Compile(); err != nil {
- log.Fatalf("error compiling config: %v", err)
- }
- if showConfig {
- os.Exit(0)
- }
-
- // Filter the findings (and aggregate by group).
- filteredFindings := make([]nogo.Finding, 0, len(findings))
- for _, finding := range findings {
- if ok := config.ShouldReport(finding); ok {
- filteredFindings = append(filteredFindings, finding)
- }
- }
-
- // Write the output (if required).
- //
- // If the outputFile is specified, then we exit here. Otherwise,
- // we continue to write to stdout and treat like a test.
- if outputFile != "" {
- if err := nogo.WriteFindingsToFile(filteredFindings, outputFile); err != nil {
- log.Fatalf("unable to write findings: %v", err)
- }
- return
- }
-
- // Treat the run as a test.
- if len(filteredFindings) == 0 {
- fmt.Fprintf(os.Stdout, "PASS\n")
- os.Exit(0)
- }
- for _, finding := range filteredFindings {
- fmt.Fprintf(os.Stdout, "%s\n", finding.String())
- }
- os.Exit(1)
-}
diff --git a/tools/nogo/findings.go b/tools/nogo/findings.go
deleted file mode 100644
index 5bd850269..000000000
--- a/tools/nogo/findings.go
+++ /dev/null
@@ -1,63 +0,0 @@
-// Copyright 2019 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package nogo
-
-import (
- "encoding/json"
- "fmt"
- "go/token"
- "io/ioutil"
-)
-
-// Finding is a single finding.
-type Finding struct {
- Category AnalyzerName
- Position token.Position
- Message string
-}
-
-// String implements fmt.Stringer.String.
-func (f *Finding) String() string {
- return fmt.Sprintf("%s: %s: %s", f.Category, f.Position.String(), f.Message)
-}
-
-// WriteFindingsToFile writes findings to a file.
-func WriteFindingsToFile(findings []Finding, filename string) error {
- content, err := WriteFindingsToBytes(findings)
- if err != nil {
- return err
- }
- return ioutil.WriteFile(filename, content, 0644)
-}
-
-// WriteFindingsToBytes serializes findings as bytes.
-func WriteFindingsToBytes(findings []Finding) ([]byte, error) {
- return json.Marshal(findings)
-}
-
-// ExtractFindingsFromFile loads findings from a file.
-func ExtractFindingsFromFile(filename string) ([]Finding, error) {
- content, err := ioutil.ReadFile(filename)
- if err != nil {
- return nil, err
- }
- return ExtractFindingsFromBytes(content)
-}
-
-// ExtractFindingsFromBytes loads findings from bytes.
-func ExtractFindingsFromBytes(content []byte) (findings []Finding, err error) {
- err = json.Unmarshal(content, &findings)
- return findings, err
-}
diff --git a/tools/nogo/nogo.go b/tools/nogo/nogo.go
deleted file mode 100644
index 779d4d6d8..000000000
--- a/tools/nogo/nogo.go
+++ /dev/null
@@ -1,473 +0,0 @@
-// Copyright 2019 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Package nogo implements binary analysis similar to bazel's nogo,
-// or the unitchecker package. It exists in order to provide additional
-// facilities for analysis, namely plumbing through the output from
-// dumping the generated binary (to analyze actual produced code).
-package nogo
-
-import (
- "encoding/json"
- "errors"
- "fmt"
- "go/ast"
- "go/build"
- "go/parser"
- "go/token"
- "go/types"
- "io"
- "io/ioutil"
- "log"
- "os"
- "path"
- "path/filepath"
- "reflect"
- "strings"
-
- "golang.org/x/tools/go/analysis"
- "golang.org/x/tools/go/analysis/internal/facts"
- "golang.org/x/tools/go/gcexportdata"
-
- // Special case: flags live here and change overall behavior.
- "gvisor.dev/gvisor/tools/checkescape"
-)
-
-// StdlibConfig is serialized as the configuration.
-//
-// This contains everything required for stdlib analysis.
-type StdlibConfig struct {
- Srcs []string
- GOOS string
- GOARCH string
- Tags []string
-}
-
-// PackageConfig is serialized as the configuration.
-//
-// This contains everything required for single package analysis.
-type PackageConfig struct {
- ImportPath string
- GoFiles []string
- NonGoFiles []string
- Tags []string
- GOOS string
- GOARCH string
- ImportMap map[string]string
- FactMap map[string]string
- StdlibFacts string
-}
-
-// loader is a fact-loader function.
-type loader func(string) ([]byte, error)
-
-// saver is a fact-saver function.
-type saver func([]byte) error
-
-// factLoader returns a function that loads facts.
-//
-// This resolves all standard library facts and imported package facts up
-// front. The returned loader function will never return an error, only
-// empty facts.
-//
-// This is done because all stdlib data is stored together, and we don't want
-// to load this data many times over.
-func (c *PackageConfig) factLoader() (loader, error) {
- allFacts := make(map[string][]byte)
- if c.StdlibFacts != "" {
- data, err := ioutil.ReadFile(c.StdlibFacts)
- if err != nil {
- return nil, fmt.Errorf("error loading stdlib facts from %q: %w", c.StdlibFacts, err)
- }
- var stdlibFacts map[string][]byte
- if err := json.Unmarshal(data, &stdlibFacts); err != nil {
- return nil, fmt.Errorf("error loading stdlib facts: %w", err)
- }
- for pkg, data := range stdlibFacts {
- allFacts[pkg] = data
- }
- }
- for pkg, file := range c.FactMap {
- data, err := ioutil.ReadFile(file)
- if err != nil {
- return nil, fmt.Errorf("error loading %q: %w", file, err)
- }
- allFacts[pkg] = data
- }
- return func(path string) ([]byte, error) {
- return allFacts[path], nil
- }, nil
-}
-
-// shouldInclude indicates whether the file should be included.
-//
-// NOTE: This does only basic parsing of tags.
-func (c *PackageConfig) shouldInclude(path string) (bool, error) {
- ctx := build.Default
- ctx.GOOS = c.GOOS
- ctx.GOARCH = c.GOARCH
- ctx.BuildTags = c.Tags
- return ctx.MatchFile(filepath.Dir(path), filepath.Base(path))
-}
-
-// importer is an implementation of go/types.Importer.
-//
-// This wraps a configuration, which provides the map of package names to
-// files, and the facts. Note that this importer implementation will always
-// pass when a given package is not available.
-type importer struct {
- *PackageConfig
- fset *token.FileSet
- cache map[string]*types.Package
- lastErr error
- callback func(string) error
-}
-
-// Import implements types.Importer.Import.
-func (i *importer) Import(path string) (*types.Package, error) {
- if path == "unsafe" {
- // Special case: go/types has pre-defined type information for
- // unsafe. We ensure that this package is correct, in case any
- // analyzers are specifically looking for this.
- return types.Unsafe, nil
- }
-
- // Call the internal callback. This is used to resolve loading order
- // for the standard library. See checkStdlib.
- if i.callback != nil {
- if err := i.callback(path); err != nil {
- i.lastErr = err
- return nil, err
- }
- }
-
- // Actually load the data.
- realPath, ok := i.ImportMap[path]
- var (
- rc io.ReadCloser
- err error
- )
- if !ok {
- // Not found in the import path. Attempt to find the package
- // via the standard library.
- rc, err = findStdPkg(i.GOOS, i.GOARCH, path)
- } else {
- // Open the file.
- rc, err = os.Open(realPath)
- }
- if err != nil {
- i.lastErr = err
- return nil, err
- }
- defer rc.Close()
-
- // Load all exported data.
- r, err := gcexportdata.NewReader(rc)
- if err != nil {
- return nil, err
- }
-
- return gcexportdata.Read(r, i.fset, i.cache, path)
-}
-
-// ErrSkip indicates the package should be skipped.
-var ErrSkip = errors.New("skipped")
-
-// CheckStdlib checks the standard library.
-//
-// This constructs a synthetic package configuration for each library in the
-// standard library sources, and call CheckPackage repeatedly.
-//
-// Note that not all parts of the source are expected to build. We skip obvious
-// test files, and cmd files, which should not be dependencies.
-func CheckStdlib(config *StdlibConfig, analyzers []*analysis.Analyzer) (allFindings []Finding, facts []byte, err error) {
- if len(config.Srcs) == 0 {
- return nil, nil, nil
- }
-
- // Ensure all paths are normalized.
- for i := 0; i < len(config.Srcs); i++ {
- config.Srcs[i] = path.Clean(config.Srcs[i])
- }
-
- // Calculate the root source directory. This is always a directory
- // named 'src', of which we simply take the first we find. This is a
- // bit fragile, but works for all currently known Go source
- // configurations.
- //
- // Note that there may be extra files outside of the root source
- // directory; we simply ignore those.
- rootSrcPrefix := ""
- for _, file := range config.Srcs {
- const src = "/src/"
- i := strings.Index(file, src)
- if i == -1 {
- // Superfluous file.
- continue
- }
-
- // Index of first character after /src/.
- i += len(src)
- rootSrcPrefix = file[:i]
- break
- }
-
- // Aggregate all files by directory.
- packages := make(map[string]*PackageConfig)
- for _, file := range config.Srcs {
- if !strings.HasPrefix(file, rootSrcPrefix) {
- // Superflouous file.
- continue
- }
-
- d := path.Dir(file)
- if len(rootSrcPrefix) >= len(d) {
- continue // Not a file.
- }
- pkg := d[len(rootSrcPrefix):]
- // Skip cmd packages and obvious test files: see above.
- if strings.HasPrefix(pkg, "cmd/") || strings.HasSuffix(file, "_test.go") {
- continue
- }
- c, ok := packages[pkg]
- if !ok {
- c = &PackageConfig{
- ImportPath: pkg,
- GOOS: config.GOOS,
- GOARCH: config.GOARCH,
- Tags: config.Tags,
- }
- packages[pkg] = c
- }
- // Add the files appropriately. Note that they will be further
- // filtered by architecture and build tags below, so this need
- // not be done immediately.
- if strings.HasSuffix(file, ".go") {
- c.GoFiles = append(c.GoFiles, file)
- } else {
- c.NonGoFiles = append(c.NonGoFiles, file)
- }
- }
-
- // Closure to check a single package.
- stdlibFacts := make(map[string][]byte)
- stdlibErrs := make(map[string]error)
- var checkOne func(pkg string) error // Recursive.
- checkOne = func(pkg string) error {
- // Is this already done?
- if _, ok := stdlibFacts[pkg]; ok {
- return nil
- }
- // Did this fail previously?
- if _, ok := stdlibErrs[pkg]; ok {
- return nil
- }
-
- // Lookup the configuration.
- config, ok := packages[pkg]
- if !ok {
- return nil // Not known.
- }
-
- // Find the binary package, and provide to objdump.
- rc, err := findStdPkg(config.GOOS, config.GOARCH, pkg)
- if err != nil {
- // If there's no binary for this package, it is likely
- // not built with the distribution. That's fine, we can
- // just skip analysis.
- stdlibErrs[pkg] = err
- return nil
- }
-
- // Provide the input.
- oldReader := checkescape.Reader
- checkescape.Reader = rc // For analysis.
- defer func() {
- rc.Close()
- checkescape.Reader = oldReader // Restore.
- }()
-
- // Run the analysis.
- findings, factData, err := CheckPackage(config, analyzers, checkOne)
- if err != nil {
- // If we can't analyze a package from the standard library,
- // then we skip it. It will simply not have any findings.
- stdlibErrs[pkg] = err
- return nil
- }
- stdlibFacts[pkg] = factData
- allFindings = append(allFindings, findings...)
- return nil
- }
-
- // Check all packages.
- //
- // Note that this may call checkOne recursively, so it's not guaranteed
- // to evaluate in the order provided here. We do ensure however, that
- // all packages are evaluated.
- for pkg := range packages {
- if err := checkOne(pkg); err != nil {
- return nil, nil, err
- }
- }
-
- // Sanity check.
- if len(stdlibFacts) == 0 {
- return nil, nil, fmt.Errorf("no stdlib facts found: misconfiguration?")
- }
-
- // Write out all findings.
- factData, err := json.Marshal(stdlibFacts)
- if err != nil {
- return nil, nil, fmt.Errorf("error saving stdlib facts: %w", err)
- }
-
- // Write out all errors.
- for pkg, err := range stdlibErrs {
- log.Printf("WARNING: error while processing %v: %v", pkg, err)
- }
-
- // Return all findings.
- return allFindings, factData, nil
-}
-
-// CheckPackage runs all given analyzers.
-//
-// The implementation was adapted from [1], which was in turn adpated from [2].
-// This returns a list of matching analysis issues, or an error if the analysis
-// could not be completed.
-//
-// [1] bazelbuid/rules_go/tools/builders/nogo_main.go
-// [2] golang.org/x/tools/go/checker/internal/checker
-func CheckPackage(config *PackageConfig, analyzers []*analysis.Analyzer, importCallback func(string) error) (findings []Finding, factData []byte, err error) {
- imp := &importer{
- PackageConfig: config,
- fset: token.NewFileSet(),
- cache: make(map[string]*types.Package),
- callback: importCallback,
- }
-
- // Load all source files.
- var syntax []*ast.File
- for _, file := range config.GoFiles {
- include, err := config.shouldInclude(file)
- if err != nil {
- return nil, nil, fmt.Errorf("error evaluating file %q: %v", file, err)
- }
- if !include {
- continue
- }
- s, err := parser.ParseFile(imp.fset, file, nil, parser.ParseComments)
- if err != nil {
- return nil, nil, fmt.Errorf("error parsing file %q: %v", file, err)
- }
- syntax = append(syntax, s)
- }
-
- // Check type information.
- typesSizes := types.SizesFor("gc", config.GOARCH)
- typeConfig := types.Config{Importer: imp}
- typesInfo := &types.Info{
- Types: make(map[ast.Expr]types.TypeAndValue),
- Uses: make(map[*ast.Ident]types.Object),
- Defs: make(map[*ast.Ident]types.Object),
- Implicits: make(map[ast.Node]types.Object),
- Scopes: make(map[ast.Node]*types.Scope),
- Selections: make(map[*ast.SelectorExpr]*types.Selection),
- }
- types, err := typeConfig.Check(config.ImportPath, imp.fset, syntax, typesInfo)
- if err != nil && imp.lastErr != ErrSkip {
- return nil, nil, fmt.Errorf("error checking types: %w", err)
- }
-
- // Load all package facts.
- loader, err := config.factLoader()
- if err != nil {
- return nil, nil, fmt.Errorf("error loading facts: %w", err)
- }
- facts, err := facts.Decode(types, loader)
- if err != nil {
- return nil, nil, fmt.Errorf("error decoding facts: %w", err)
- }
-
- // Register fact types and establish dependencies between analyzers.
- // The visit closure will execute recursively, and populate results
- // will all required analysis results.
- results := make(map[*analysis.Analyzer]interface{})
- var visit func(*analysis.Analyzer) error // For recursion.
- visit = func(a *analysis.Analyzer) error {
- if _, ok := results[a]; ok {
- return nil
- }
-
- // Run recursively for all dependencies.
- for _, req := range a.Requires {
- if err := visit(req); err != nil {
- return err
- }
- }
-
- // Run the analysis.
- factFilter := make(map[reflect.Type]bool)
- for _, f := range a.FactTypes {
- factFilter[reflect.TypeOf(f)] = true
- }
- p := &analysis.Pass{
- Analyzer: a,
- Fset: imp.fset,
- Files: syntax,
- Pkg: types,
- TypesInfo: typesInfo,
- ResultOf: results, // All results.
- Report: func(d analysis.Diagnostic) {
- findings = append(findings, Finding{
- Category: AnalyzerName(a.Name),
- Position: imp.fset.Position(d.Pos),
- Message: d.Message,
- })
- },
- ImportPackageFact: facts.ImportPackageFact,
- ExportPackageFact: facts.ExportPackageFact,
- ImportObjectFact: facts.ImportObjectFact,
- ExportObjectFact: facts.ExportObjectFact,
- AllPackageFacts: func() []analysis.PackageFact { return facts.AllPackageFacts(factFilter) },
- AllObjectFacts: func() []analysis.ObjectFact { return facts.AllObjectFacts(factFilter) },
- TypesSizes: typesSizes,
- }
- result, err := a.Run(p)
- if err != nil {
- return fmt.Errorf("error running analysis %s: %v", a, err)
- }
-
- // Sanity check & save the result.
- if got, want := reflect.TypeOf(result), a.ResultType; got != want {
- return fmt.Errorf("error: analyzer %s returned a result of type %v, but declared ResultType %v", a, got, want)
- }
- results[a] = result
- return nil // Success.
- }
-
- // Visit all analyzers recursively.
- for _, a := range analyzers {
- if imp.lastErr == ErrSkip {
- continue // No local analysis.
- }
- if err := visit(a); err != nil {
- return nil, nil, err // Already has context.
- }
- }
-
- // Return all findings.
- return findings, facts.Encode(), nil
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-06 06:41:34 +0000