Fix non-determinism in prebuilt selection am: f2c1057586 (d1816e09) · Commits · e / os / android_build_soong

android/prebuilt.go

+30 −1

Original line number	Diff line number	Diff line
		@@ -534,6 +534,35 @@ func hideUnflaggedModules(ctx BottomUpMutatorContext, psi PrebuiltSelectionInfoM
		for _, moduleInFamily := range allModulesInFamily {
		if moduleInFamily.Name() != selectedModuleInFamily.Name() {
		moduleInFamily.HideFromMake()
		// If this is a prebuilt module, unset properties.UsePrebuilt
		// properties.UsePrebuilt might evaluate to true via soong config var fallback mechanism
		// Set it to false explicitly so that the following mutator does not replace rdeps to this unselected prebuilt
		if p := GetEmbeddedPrebuilt(moduleInFamily); p != nil {
		p.properties.UsePrebuilt = false
		}
		}
		}
		}
		// Do a validation pass to make sure that multiple prebuilts of a specific module are not selected.
		// This might happen if the prebuilts share the same soong config var namespace.
		// This should be an error, unless one of the prebuilts has been explicitly declared in apex_contributions
		var selectedPrebuilt Module
		for _, moduleInFamily := range allModulesInFamily {
		// Skip if this module is in a different namespace
		if !moduleInFamily.ExportedToMake() {
		continue
		}
		// Skip for the top-level java_sdk_library_(_import). This has some special cases that need to be addressed first.
		// This does not run into non-determinism because PrebuiltPostDepsMutator also has the special case
		if sdkLibrary, ok := moduleInFamily.(interface{ SdkLibraryName() *string }); ok && sdkLibrary.SdkLibraryName() != nil {
		continue
		}
		if p := GetEmbeddedPrebuilt(moduleInFamily); p != nil && p.properties.UsePrebuilt {
		if selectedPrebuilt == nil {
		selectedPrebuilt = moduleInFamily
		} else {
		ctx.ModuleErrorf("Multiple prebuilt modules %v and %v have been marked as preferred for this source module. "+
		"Please add the appropriate prebuilt module to apex_contributions for this release config.", selectedPrebuilt.Name(), moduleInFamily.Name())
		}
		}
		}
		@@ -562,7 +591,7 @@ func PrebuiltPostDepsMutator(ctx BottomUpMutatorContext) {
		// If we do not special-case this here, rdeps referring to a java_sdk_library in next builds via libs
		// will get prebuilt stubs
		// TODO (b/308187268): Remove this after the apexes have been added to apex_contributions
		if psi.IsSelected(*sdkLibrary.SdkLibraryName()) {
		if psi.IsSelected(name) {
		return false
		}
		}

apex/apex_test.go

+2 −2

Original line number	Diff line number	Diff line
		@@ -6199,7 +6199,7 @@ func TestBootDexJarsFromSourcesAndPrebuilts(t *testing.T) {
		`)
		})

		t.Run("Co-existing unflagged apexes should create a duplicate deapexer error in hiddenapi processing", func(t *testing.T) {
		t.Run("Co-existing unflagged apexes should create a duplicate module error", func(t *testing.T) {
		bp := `
		// Source
		apex {
		@@ -6273,7 +6273,7 @@ func TestBootDexJarsFromSourcesAndPrebuilts(t *testing.T) {
		}
		`

		testDexpreoptWithApexes(t, bp, "Multiple installable prebuilt APEXes provide ambiguous deapexers: prebuilt_myapex.v1 and prebuilt_myapex.v2", preparer, fragment)
		testDexpreoptWithApexes(t, bp, "Multiple prebuilt modules prebuilt_myapex.v1 and prebuilt_myapex.v2 have been marked as preferred for this source module", preparer, fragment)
		})

		}

cc/prebuilt_test.go

+92 −0

Original line number	Diff line number	Diff line
		@@ -610,3 +610,95 @@ func TestMultiplePrebuilts(t *testing.T) {
		android.AssertStringEquals(t, "unexpected LOCAL_MODULE", "libbar", entries.EntryMap["LOCAL_MODULE"][0])
		}
		}

		// Setting prefer on multiple prebuilts is an error, unless one of them is also listed in apex_contributions
		func TestMultiplePrebuiltsPreferredUsingLegacyFlags(t *testing.T) {
		bp := `
		// an rdep
		cc_library {
		name: "libfoo",
		shared_libs: ["libbar"],
		}

		// multiple variations of dep
		// source
		cc_library {
		name: "libbar",
		}
		// prebuilt "v1"
		cc_prebuilt_library_shared {
		name: "libbar",
		srcs: ["libbar.so"],
		prefer: true,
		}
		// prebuilt "v2"
		cc_prebuilt_library_shared {
		name: "libbar.v2",
		stem: "libbar",
		source_module_name: "libbar",
		srcs: ["libbar.so"],
		prefer: true,
		}

		// selectors
		apex_contributions {
		name: "myapex_contributions",
		contents: [%v],
		}
		all_apex_contributions {name: "all_apex_contributions"}
		`
		hasDep := func(ctx *android.TestContext, m android.Module, wantDep android.Module) bool {
		t.Helper()
		var found bool
		ctx.VisitDirectDeps(m, func(dep blueprint.Module) {
		if dep == wantDep {
		found = true
		}
		})
		return found
		}

		testCases := []struct {
		desc string
		selectedDependencyName string
		expectedDependencyName string
		expectedErr string
		}{
		{
		desc: "Multiple prebuilts have prefer: true",
		expectedErr: "Multiple prebuilt modules prebuilt_libbar and prebuilt_libbar.v2 have been marked as preferred for this source module",
		},
		{
		desc: "Multiple prebuilts have prefer: true. The prebuilt listed in apex_contributions wins.",
		selectedDependencyName: `"prebuilt_libbar"`,
		expectedDependencyName: "prebuilt_libbar",
		},
		}

		for _, tc := range testCases {
		preparer := android.GroupFixturePreparers(
		android.FixtureRegisterWithContext(func(ctx android.RegistrationContext) {
		android.RegisterApexContributionsBuildComponents(ctx)
		}),
		android.FixtureModifyProductVariables(func(variables android.FixtureProductVariables) {
		variables.BuildFlags = map[string]string{
		"RELEASE_APEX_CONTRIBUTIONS_ADSERVICES": "myapex_contributions",
		}
		}),
		)
		if tc.expectedErr != "" {
		preparer = preparer.ExtendWithErrorHandler(android.FixtureExpectsAtLeastOneErrorMatchingPattern(tc.expectedErr))
		}

		ctx := testPrebuilt(t, fmt.Sprintf(bp, tc.selectedDependencyName), map[string][]byte{
		"libbar.so": nil,
		"crtx.o": nil,
		}, preparer)
		if tc.expectedErr != "" {
		return // the fixture will assert that the excepted err has been raised
		}
		libfoo := ctx.ModuleForTests("libfoo", "android_arm64_armv8-a_shared").Module()
		expectedDependency := ctx.ModuleForTests(tc.expectedDependencyName, "android_arm64_armv8-a_shared").Module()
		android.AssertBoolEquals(t, fmt.Sprintf("expected dependency from %s to %s\n", libfoo.Name(), tc.expectedDependencyName), true, hasDep(ctx, libfoo, expectedDependency))
		}
		}