Block CFI on static libraries

Bug: 295805467
Test: Unit tests and inspecting generated BUILD files
Change-Id: I1bbd2f48ad384e0b5b6f7cc1458b12ded2748e8f

bazel/properties.go

@@ -1296,6 +1296,42 @@ func (sla StringListAttribute) IsEmpty() bool {
 	return len(sla.Value) == 0 && !sla.HasConfigurableValues()
 }
 
+// RemoveFromAllConfigs removes all instances of the specified value from all configurations
+// of the givenStringListAttribute
+func (sla *StringListAttribute) RemoveFromAllConfigs(toRemove string) {
+	if removed, removalResult := removeFromList(toRemove, sla.Value); removed {
+		if len(removalResult) > 0 {
+			sla.Value = removalResult
+		} else {
+			sla.Value = nil
+		}
+	}
+	for axis, slsv := range sla.ConfigurableValues {
+		for config, sl := range slsv {
+			if removed, removalResult := removeFromList(toRemove, sl); removed {
+				if len(removalResult) > 0 {
+					sla.SetSelectValue(axis, config, removalResult)
+				} else {
+					sla.SetSelectValue(axis, config, nil)
+				}
+			}
+		}
+	}
+}
+
+func removeFromList(s string, list []string) (bool, []string) {
+	result := make([]string, 0, len(list))
+	var removed bool
+	for _, item := range list {
+		if item != s {
+			result = append(result, item)
+		} else {
+			removed = true
+		}
+	}
+	return removed, result
+}
+
 type configurableStringLists map[ConfigurationAxis]stringListSelectValues
 
 func (csl configurableStringLists) Append(other configurableStringLists) {

bp2build/cc_library_conversion_test.go

@@ -4785,7 +4785,6 @@ cc_library {
 }`,
 		ExpectedBazelTargets: []string{
 			MakeBazelTarget("cc_library_static", "foo_bp2build_cc_library_static", AttrNameToString{
-				"features":       `["android_cfi"]`,
 				"local_includes": `["."]`,
 			}),
 			MakeBazelTarget("cc_library_shared", "foo", AttrNameToString{
@@ -4814,10 +4813,6 @@ cc_library {
 }`,
 		ExpectedBazelTargets: []string{
 			MakeBazelTarget("cc_library_static", "foo_bp2build_cc_library_static", AttrNameToString{
-				"features": `select({
-        "//build/bazel/platforms/os:android": ["android_cfi"],
-        "//conditions:default": [],
-    })`,
 				"local_includes": `["."]`,
 			}),
 			MakeBazelTarget("cc_library_shared", "foo", AttrNameToString{
@@ -4848,10 +4843,7 @@ cc_library {
 }`,
 		ExpectedBazelTargets: []string{
 			MakeBazelTarget("cc_library_static", "foo_bp2build_cc_library_static", AttrNameToString{
-				"features": `[
-        "android_cfi",
-        "android_cfi_assembly_support",
-    ]`,
+				"features":       `["android_cfi_assembly_support"]`,
 				"local_includes": `["."]`,
 			}),
 			MakeBazelTarget("cc_library_shared", "foo", AttrNameToString{

bp2build/cc_library_shared_conversion_test.go

@@ -1522,7 +1522,7 @@ func TestCcLibrarySharedWithCfiAndCfiAssemblySupport(t *testing.T) {
 	runCcLibrarySharedTestCase(t, Bp2buildTestCase{
 		Description: "cc_library_shared has correct features when cfi is enabled with cfi assembly support",
 		Blueprint: `
-cc_library_static {
+cc_library_shared {
 	name: "foo",
 	sanitize: {
 		cfi: true,
@@ -1532,7 +1532,7 @@ cc_library_static {
 	},
 }`,
 		ExpectedBazelTargets: []string{
-			MakeBazelTarget("cc_library_static", "foo", AttrNameToString{
+			MakeBazelTarget("cc_library_shared", "foo", AttrNameToString{
 				"features": `[
         "android_cfi",
         "android_cfi_assembly_support",

bp2build/cc_library_static_conversion_test.go

@@ -2135,9 +2135,9 @@ cc_library_static {
 	})
 }
 
-func TestCcLibraryStaticWithCfi(t *testing.T) {
+func TestCcLibraryStaticNoCfi(t *testing.T) {
 	runCcLibraryStaticTestCase(t, Bp2buildTestCase{
-		Description: "cc_library_static has correct features when cfi is enabled",
+		Description: "cc_library_static never explicitly enables CFI",
 		Blueprint: `
 cc_library_static {
 	name: "foo",
@@ -2147,7 +2147,6 @@ cc_library_static {
 }`,
 		ExpectedBazelTargets: []string{
 			MakeBazelTarget("cc_library_static", "foo", AttrNameToString{
-				"features":       `["android_cfi"]`,
 				"local_includes": `["."]`,
 			}),
 		},
@@ -2156,7 +2155,7 @@ cc_library_static {
 
 func TestCcLibraryStaticWithCfiOsSpecific(t *testing.T) {
 	runCcLibraryStaticTestCase(t, Bp2buildTestCase{
-		Description: "cc_library_static has correct features when cfi is enabled for specific variants",
+		Description: "cc_library_static never explicitly enables CFI even for specific variants",
 		Blueprint: `
 cc_library_static {
 	name: "foo",
@@ -2170,10 +2169,6 @@ cc_library_static {
 }`,
 		ExpectedBazelTargets: []string{
 			MakeBazelTarget("cc_library_static", "foo", AttrNameToString{
-				"features": `select({
-        "//build/bazel/platforms/os:android": ["android_cfi"],
-        "//conditions:default": [],
-    })`,
 				"local_includes": `["."]`,
 			}),
 		},
@@ -2182,7 +2177,7 @@ cc_library_static {
 
 func TestCcLibraryStaticWithCfiAndCfiAssemblySupport(t *testing.T) {
 	runCcLibraryStaticTestCase(t, Bp2buildTestCase{
-		Description: "cc_library_static has correct features when cfi is enabled with cfi_assembly_support",
+		Description: "cc_library_static will specify cfi_assembly_support feature but not cfi feature",
 		Blueprint: `
 cc_library_static {
 	name: "foo",
@@ -2195,10 +2190,7 @@ cc_library_static {
 }`,
 		ExpectedBazelTargets: []string{
 			MakeBazelTarget("cc_library_static", "foo", AttrNameToString{
-				"features": `[
-        "android_cfi",
-        "android_cfi_assembly_support",
-    ]`,
+				"features":       `["android_cfi_assembly_support"]`,
 				"local_includes": `["."]`,
 			}),
 		},

cc/Android.bp

@@ -30,6 +30,7 @@ bootstrap_go_package {
         "cc.go",
         "ccdeps.go",
         "check.go",
+        "constants.go",
         "coverage.go",
         "gen.go",
         "generated_cc_library.go",

cc/bp2build.go

@@ -1953,9 +1953,9 @@ func bp2buildSanitizerFeatures(ctx android.BazelConversionPathContext, m *Module
 				sanitizerCompilerInputs.SetSelectValue(bazel.SanitizersEnabledAxis, bazel.SanitizersEnabled, bazel.MakeLabelListFromTargetNames([]string{*blocklist}))
 			}
 			if sanitizerProps.Sanitize.Cfi != nil && !proptools.Bool(sanitizerProps.Sanitize.Cfi) {
-				features = append(features, "-android_cfi")
+				features = append(features, "-"+cfiFeatureName)
 			} else if proptools.Bool(sanitizerProps.Sanitize.Cfi) {
-				features = append(features, "android_cfi")
+				features = append(features, cfiFeatureName)
 				if proptools.Bool(sanitizerProps.Sanitize.Config.Cfi_assembly_support) {
 					features = append(features, "android_cfi_assembly_support")
 				}

cc/constants.go

@@ -0,0 +1,19 @@
+// Copyright 2016 Google Inc. All rights reserved.
+//
+// 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 cc
+
+var (
+	cfiFeatureName = "android_cfi"
+)

cc/library.go

@@ -331,6 +331,7 @@ func libraryBp2Build(ctx android.TopDownMutatorContext, m *Module) {
 	sharedFeatures.DeduplicateAxesFromBase()
 	staticFeatures := baseAttributes.features.Clone().Append(staticAttrs.Features)
 	staticFeatures.DeduplicateAxesFromBase()
+	staticFeatures.RemoveFromAllConfigs(cfiFeatureName)
 
 	staticCommonAttrs := staticOrSharedAttributes{
 		Srcs:    *srcs.Clone().Append(staticAttrs.Srcs),
@@ -2946,6 +2947,9 @@ func sharedOrStaticLibraryBp2Build(ctx android.TopDownMutatorContext, module *Mo
 
 	features := baseAttributes.features.Clone().Append(libSharedOrStaticAttrs.Features)
 	features.DeduplicateAxesFromBase()
+	if isStatic {
+		features.RemoveFromAllConfigs(cfiFeatureName)
+	}
 
 	commonAttrs := staticOrSharedAttributes{
 		Srcs:    compilerAttrs.srcs,