Revert "Fix non-determinism in prebuilt selection"

This reverts commit 2d8884a37757edc6b984e1e073ab5a9e4a85f778.

Reason for revert: Build breakage https://groups.google.com/a/google.com/g/android-build-police-core/c/00mM-B9unVg/m/0FxBxpMbAwAJ. The validation does not check for namespace isolation which breaks libtonemap

Change-Id: Ieb4d3bc4f3ade856877ebb62a567620f5a1ed08c

3 files changed, 3 insertions, 120 deletions

diff --git a/android/prebuilt.go b/android/prebuilt.go
index 7a9e89cdf..13cda9dad 100644
--- a/android/prebuilt.go
+++ b/android/prebuilt.go
@@ -534,31 +534,6 @@ 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 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())
 			}
 		}
 	}
@@ -587,7 +562,7 @@ 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(name) {
+						if psi.IsSelected(*sdkLibrary.SdkLibraryName()) {
 							return false
 						}
 					}
diff --git a/apex/apex_test.go b/apex/apex_test.go
index 65f0a235b..85d1d712a 100644
--- a/apex/apex_test.go
+++ b/apex/apex_test.go
@@ -6199,7 +6199,7 @@ func TestBootDexJarsFromSourcesAndPrebuilts(t *testing.T) {
 		`)
 	})
 
-	t.Run("Co-existing unflagged apexes should create a duplicate module error", func(t *testing.T) {
+	t.Run("Co-existing unflagged apexes should create a duplicate deapexer error in hiddenapi processing", func(t *testing.T) {
 		bp := `
 		// Source
 		apex {
@@ -6273,7 +6273,7 @@ func TestBootDexJarsFromSourcesAndPrebuilts(t *testing.T) {
 		}
 	`
 
-		testDexpreoptWithApexes(t, bp, "Multiple prebuilt modules prebuilt_myapex.v1 and prebuilt_myapex.v2 have been marked as preferred for this source module", preparer, fragment)
+		testDexpreoptWithApexes(t, bp, "Multiple installable prebuilt APEXes provide ambiguous deapexers: prebuilt_myapex.v1 and prebuilt_myapex.v2", preparer, fragment)
 	})
 
 }
diff --git a/cc/prebuilt_test.go b/cc/prebuilt_test.go
index 7dfe6422f..f6b5ed56c 100644
--- a/cc/prebuilt_test.go
+++ b/cc/prebuilt_test.go
@@ -610,95 +610,3 @@ 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))
-	}
-}