refactor(bob_toolchain): make mte props generic

core/androidbp_cclibs.go

@@ -353,7 +353,10 @@ func addBinaryProps(mod bpwriter.Module, m ModuleBinary, ctx blueprint.ModuleCon
 		}
 	}
 
-	addMTEProps(mod, m.Properties.Build.AndroidMTEProps)
+	bc := GetModuleBackendConfiguration(ctx, m)
+	if bc != nil {
+		addMTEProps(mod, bc.GetMteProps(ctx))
+	}
 	addHWASANProps(mod, m.Properties.Build)
 }
 
@@ -487,17 +490,10 @@ func addCompilableProps(mod bpwriter.Module, m Compilable, ctx blueprint.ModuleC
 			}
 		})
 
-	ctx.VisitDirectDepsIf(
-		func(dep blueprint.Module) bool {
-			return ctx.OtherModuleDependencyTag(dep) == tag.ToolchainTag
-		},
-		func(dep blueprint.Module) {
-			if t, ok := dep.(*ModuleToolchain); ok {
-				addMTEProps(mod, t.Properties.AndroidMTEProps)
-			} else {
-				panic(fmt.Errorf("dependency '%s' of '%s' is not a toolchain module", dep.Name(), ctx.ModuleName()))
-			}
-		})
+	bc := GetModuleBackendConfiguration(ctx, m)
+	if bc != nil {
+		addMTEProps(mod, bc.GetMteProps(ctx))
+	}
 
 	if std := ccflags.GetCompilerStandard(cflags, conlyFlags); std != "" {
 		mod.AddString("c_std", std)

core/binary.go

@@ -16,8 +16,9 @@ type binaryInterface interface {
 	file.Provider // A binary can provide itself as a source
 }
 
-var _ binaryInterface = (*ModuleBinary)(nil)  // impl check
-var _ libraryInterface = (*ModuleBinary)(nil) // impl check
+var _ binaryInterface = (*ModuleBinary)(nil)      // impl check
+var _ libraryInterface = (*ModuleBinary)(nil)     // impl check
+var _ BackendConfiguration = (*ModuleBinary)(nil) // impl check
 
 func (m *ModuleBinary) OutFiles() (srcs file.Paths) {
 	return file.Paths{file.NewPath(m.outputName(), string(m.getTarget()), file.TypeBinary|file.TypeExecutable|file.TypeInstallable)}

core/library.go

@@ -457,6 +457,10 @@ func (m *ModuleLibrary) GetBuildWrapperAndDeps(ctx blueprint.ModuleContext) (str
 	return m.Properties.Build.GetBuildWrapperAndDeps(ctx)
 }
 
+func (m *ModuleLibrary) GetMteProps(blueprint.ModuleContext) AndroidMTEProps {
+	return m.Properties.AndroidMTEProps
+}
+
 func (m *ModuleLibrary) IsForwardingSharedLibrary() bool {
 	return m.Properties.isForwardingSharedLibrary()
 }

core/module_toolchain.go

@@ -29,6 +29,8 @@ type ModuleToolchainProps struct {
 
 	// Wrapper for all build commands (object file compilation *and* linking)
 	Build_wrapper *string
+
+	AndroidMTEProps
 }
 
 type ToolchainFlagsProps struct {
@@ -54,16 +56,14 @@ type ModuleToolchain struct {
 		Host       TargetSpecific
 		TargetType toolchain.TgtType `blueprint:"mutated"`
 
-		// Arm Memory Tagging Extension
-		AndroidMTEProps
-
 		Features
 	}
 }
 
 type BackendConfiguration interface {
 	stripable
 	GetBuildWrapperAndDeps(blueprint.ModuleContext) (string, []string)
+	GetMteProps(blueprint.ModuleContext) AndroidMTEProps
 }
 
 // This interface provides configuration features
@@ -148,6 +148,10 @@ func (m *ModuleToolchain) targetableProperties() []interface{} {
 	}
 }
 
+func (m *ModuleToolchain) GetMteProps(blueprint.ModuleContext) AndroidMTEProps {
+	return m.Properties.AndroidMTEProps
+}
+
 func (m *ModuleToolchain) GetBuildWrapperAndDeps(ctx blueprint.ModuleContext) (string, []string) {
 	// Copies the behaviour from core/build.go
 	if m.Properties.Build_wrapper != nil {