Start using "struct Objects" to store object Paths

So that we can represent other files that get generated along with the
objects, like the gcno coverage information, and per-file clang-tidy
runs.

Test: Soong's build.ninja identical before/after
Change-Id: I5c553a153c436d5403549f62c73fe79c5f101779

cc/binary.go

@@ -250,7 +250,7 @@ func (binary *binaryDecorator) linkerFlags(ctx ModuleContext, flags Flags) Flags
 }
 
 func (binary *binaryDecorator) link(ctx ModuleContext,
-	flags Flags, deps PathDeps, objFiles android.Paths) android.Path {
+	flags Flags, deps PathDeps, objs Objects) android.Path {
 
 	fileName := binary.getStem(ctx) + flags.Toolchain.ExecutableSuffix()
 	outputFile := android.PathForModuleOut(ctx, fileName)
@@ -283,7 +283,7 @@ func (binary *binaryDecorator) link(ctx ModuleContext,
 	linkerDeps = append(linkerDeps, deps.SharedLibsDeps...)
 	linkerDeps = append(linkerDeps, deps.LateSharedLibsDeps...)
 
-	TransformObjToDynamicBinary(ctx, objFiles, sharedLibs, deps.StaticLibs,
+	TransformObjToDynamicBinary(ctx, objs.objFiles, sharedLibs, deps.StaticLibs,
 		deps.LateStaticLibs, deps.WholeStaticLibs, linkerDeps, deps.CrtBegin, deps.CrtEnd, true,
 		builderFlags, outputFile)
 

cc/builder.go

@@ -182,11 +182,27 @@ type builderFlags struct {
 	stripAddGnuDebuglink   bool
 }
 
+type Objects struct {
+	objFiles android.Paths
+}
+
+func (a Objects) Copy() Objects {
+	return Objects{
+		objFiles: append(android.Paths{}, a.objFiles...),
+	}
+}
+
+func (a Objects) Append(b Objects) Objects {
+	return Objects{
+		objFiles: append(a.objFiles, b.objFiles...),
+	}
+}
+
 // Generate rules for compiling multiple .c, .cpp, or .S files to individual .o files
 func TransformSourceToObj(ctx android.ModuleContext, subdir string, srcFiles android.Paths,
-	flags builderFlags, deps android.Paths) (objFiles android.Paths) {
+	flags builderFlags, deps android.Paths) Objects {
 
-	objFiles = make(android.Paths, len(srcFiles))
+	objFiles := make(android.Paths, len(srcFiles))
 
 	cflags := flags.globalFlags + " " + flags.cFlags + " " + flags.conlyFlags
 	cppflags := flags.globalFlags + " " + flags.cFlags + " " + flags.cppFlags
@@ -250,7 +266,9 @@ func TransformSourceToObj(ctx android.ModuleContext, subdir string, srcFiles and
 		})
 	}
 
-	return objFiles
+	return Objects{
+		objFiles: objFiles,
+	}
 }
 
 // Generate a rule for compiling multiple .o files to a static library (.a)

cc/cc.go

@@ -76,8 +76,8 @@ type PathDeps struct {
 	StaticLibs, LateStaticLibs, WholeStaticLibs android.Paths
 
 	// Paths to .o files
-	ObjFiles               android.Paths
-	WholeStaticLibObjFiles android.Paths
+	Objs               Objects
+	WholeStaticLibObjs Objects
 
 	// Paths to generated source files
 	GeneratedSources android.Paths
@@ -174,7 +174,7 @@ type compiler interface {
 
 	appendCflags([]string)
 	appendAsflags([]string)
-	compile(ctx ModuleContext, flags Flags, deps PathDeps) android.Paths
+	compile(ctx ModuleContext, flags Flags, deps PathDeps) Objects
 }
 
 type linker interface {
@@ -183,7 +183,7 @@ type linker interface {
 	linkerFlags(ctx ModuleContext, flags Flags) Flags
 	linkerProps() []interface{}
 
-	link(ctx ModuleContext, flags Flags, deps PathDeps, objFiles android.Paths) android.Path
+	link(ctx ModuleContext, flags Flags, deps PathDeps, objs Objects) android.Path
 	appendLdflags([]string)
 }
 
@@ -440,16 +440,16 @@ func (c *Module) GenerateAndroidBuildActions(actx android.ModuleContext) {
 
 	flags.GlobalFlags = append(flags.GlobalFlags, deps.Flags...)
 
-	var objFiles android.Paths
+	var objs Objects
 	if c.compiler != nil {
-		objFiles = c.compiler.compile(ctx, flags, deps)
+		objs = c.compiler.compile(ctx, flags, deps)
 		if ctx.Failed() {
 			return
 		}
 	}
 
 	if c.linker != nil {
-		outputFile := c.linker.link(ctx, flags, deps, objFiles)
+		outputFile := c.linker.link(ctx, flags, deps, objs)
 		if ctx.Failed() {
 			return
 		}
@@ -813,8 +813,7 @@ func (c *Module) depsToPaths(ctx android.ModuleContext) PathDeps {
 		}
 
 		if tag == reuseObjTag {
-			depPaths.ObjFiles = append(depPaths.ObjFiles,
-				cc.compiler.(libraryInterface).reuseObjs()...)
+			depPaths.Objs = depPaths.Objs.Append(cc.compiler.(libraryInterface).reuseObjs())
 			return
 		}
 
@@ -868,10 +867,9 @@ func (c *Module) depsToPaths(ctx android.ModuleContext) PathDeps {
 				}
 				ctx.AddMissingDependencies(missingDeps)
 			}
-			depPaths.WholeStaticLibObjFiles =
-				append(depPaths.WholeStaticLibObjFiles, staticLib.objs()...)
+			depPaths.WholeStaticLibObjs = depPaths.WholeStaticLibObjs.Append(staticLib.objs())
 		case objDepTag:
-			ptr = &depPaths.ObjFiles
+			depPaths.Objs.objFiles = append(depPaths.Objs.objFiles, linkFile.Path())
 		case crtBeginDepTag:
 			depPaths.CrtBegin = linkFile
 		case crtEndDepTag:

cc/compiler.go

@@ -350,7 +350,7 @@ func ndkPathDeps(ctx ModuleContext) android.Paths {
 	return nil
 }
 
-func (compiler *baseCompiler) compile(ctx ModuleContext, flags Flags, deps PathDeps) android.Paths {
+func (compiler *baseCompiler) compile(ctx ModuleContext, flags Flags, deps PathDeps) Objects {
 	pathDeps := deps.GeneratedHeaders
 	pathDeps = append(pathDeps, ndkPathDeps(ctx)...)
 
@@ -367,18 +367,18 @@ func (compiler *baseCompiler) compile(ctx ModuleContext, flags Flags, deps PathD
 	compiler.deps = pathDeps
 
 	// Compile files listed in c.Properties.Srcs into objects
-	objFiles := compileObjs(ctx, buildFlags, "", srcs, compiler.deps)
+	objs := compileObjs(ctx, buildFlags, "", srcs, compiler.deps)
 
 	if ctx.Failed() {
-		return nil
+		return Objects{}
 	}
 
-	return objFiles
+	return objs
 }
 
 // Compile a list of source files into objects a specified subdirectory
 func compileObjs(ctx android.ModuleContext, flags builderFlags,
-	subdir string, srcFiles, deps android.Paths) android.Paths {
+	subdir string, srcFiles, deps android.Paths) Objects {
 
 	return TransformSourceToObj(ctx, subdir, srcFiles, flags, deps)
 }

cc/library.go

@@ -160,7 +160,7 @@ type libraryDecorator struct {
 	Properties LibraryProperties
 
 	// For reusing static library objects for shared library
-	reuseObjFiles android.Paths
+	reuseObjects Objects
 	// table-of-contents file to optimize out relinking when possible
 	tocFile android.OptionalPath
 
@@ -173,7 +173,7 @@ type libraryDecorator struct {
 	wholeStaticMissingDeps []string
 
 	// For whole_static_libs
-	objFiles android.Paths
+	objects Objects
 
 	// Uses the module's name if empty, but can be overridden. Does not include
 	// shlib suffix.
@@ -251,31 +251,29 @@ func (library *libraryDecorator) linkerFlags(ctx ModuleContext, flags Flags) Fla
 	return flags
 }
 
-func (library *libraryDecorator) compile(ctx ModuleContext, flags Flags, deps PathDeps) android.Paths {
-	var objFiles android.Paths
-
-	objFiles = library.baseCompiler.compile(ctx, flags, deps)
-	library.reuseObjFiles = objFiles
+func (library *libraryDecorator) compile(ctx ModuleContext, flags Flags, deps PathDeps) Objects {
+	objs := library.baseCompiler.compile(ctx, flags, deps)
+	library.reuseObjects = objs
 	buildFlags := flagsToBuilderFlags(flags)
 
 	if library.static() {
 		srcs := android.PathsForModuleSrc(ctx, library.Properties.Static.Srcs)
-		objFiles = append(objFiles, compileObjs(ctx, buildFlags, android.DeviceStaticLibrary,
-			srcs, library.baseCompiler.deps)...)
+		objs = objs.Append(compileObjs(ctx, buildFlags, android.DeviceStaticLibrary,
+			srcs, library.baseCompiler.deps))
 	} else {
 		srcs := android.PathsForModuleSrc(ctx, library.Properties.Shared.Srcs)
-		objFiles = append(objFiles, compileObjs(ctx, buildFlags, android.DeviceSharedLibrary,
-			srcs, library.baseCompiler.deps)...)
+		objs = objs.Append(compileObjs(ctx, buildFlags, android.DeviceSharedLibrary,
+			srcs, library.baseCompiler.deps))
 	}
 
-	return objFiles
+	return objs
 }
 
 type libraryInterface interface {
 	getWholeStaticMissingDeps() []string
 	static() bool
-	objs() android.Paths
-	reuseObjs() android.Paths
+	objs() Objects
+	reuseObjs() Objects
 	toc() android.OptionalPath
 
 	// Returns true if the build options for the module have selected a static or shared build
@@ -340,18 +338,18 @@ func (library *libraryDecorator) linkerDeps(ctx BaseModuleContext, deps Deps) De
 }
 
 func (library *libraryDecorator) linkStatic(ctx ModuleContext,
-	flags Flags, deps PathDeps, objFiles android.Paths) android.Path {
+	flags Flags, deps PathDeps, objs Objects) android.Path {
 
-	library.objFiles = append(android.Paths{}, deps.WholeStaticLibObjFiles...)
-	library.objFiles = append(library.objFiles, objFiles...)
+	library.objects = deps.WholeStaticLibObjs.Copy()
+	library.objects = library.objects.Append(objs)
 
 	outputFile := android.PathForModuleOut(ctx,
 		ctx.ModuleName()+library.Properties.VariantName+staticLibraryExtension)
 
 	if ctx.Darwin() {
-		TransformDarwinObjToStaticLib(ctx, library.objFiles, flagsToBuilderFlags(flags), outputFile)
+		TransformDarwinObjToStaticLib(ctx, library.objects.objFiles, flagsToBuilderFlags(flags), outputFile)
 	} else {
-		TransformObjToStaticLib(ctx, library.objFiles, flagsToBuilderFlags(flags), outputFile)
+		TransformObjToStaticLib(ctx, library.objects.objFiles, flagsToBuilderFlags(flags), outputFile)
 	}
 
 	library.wholeStaticMissingDeps = ctx.GetMissingDependencies()
@@ -362,7 +360,7 @@ func (library *libraryDecorator) linkStatic(ctx ModuleContext,
 }
 
 func (library *libraryDecorator) linkShared(ctx ModuleContext,
-	flags Flags, deps PathDeps, objFiles android.Paths) android.Path {
+	flags Flags, deps PathDeps, objs Objects) android.Path {
 
 	var linkerDeps android.Paths
 
@@ -455,7 +453,7 @@ func (library *libraryDecorator) linkShared(ctx ModuleContext,
 	linkerDeps = append(linkerDeps, deps.SharedLibsDeps...)
 	linkerDeps = append(linkerDeps, deps.LateSharedLibsDeps...)
 
-	TransformObjToDynamicBinary(ctx, objFiles, sharedLibs,
+	TransformObjToDynamicBinary(ctx, objs.objFiles, sharedLibs,
 		deps.StaticLibs, deps.LateStaticLibs, deps.WholeStaticLibs,
 		linkerDeps, deps.CrtBegin, deps.CrtEnd, false, builderFlags, outputFile)
 
@@ -463,15 +461,15 @@ func (library *libraryDecorator) linkShared(ctx ModuleContext,
 }
 
 func (library *libraryDecorator) link(ctx ModuleContext,
-	flags Flags, deps PathDeps, objFiles android.Paths) android.Path {
+	flags Flags, deps PathDeps, objs Objects) android.Path {
 
-	objFiles = append(objFiles, deps.ObjFiles...)
+	objs = objs.Append(deps.Objs)
 
 	var out android.Path
 	if library.static() {
-		out = library.linkStatic(ctx, flags, deps, objFiles)
+		out = library.linkStatic(ctx, flags, deps, objs)
 	} else {
-		out = library.linkShared(ctx, flags, deps, objFiles)
+		out = library.linkShared(ctx, flags, deps, objs)
 	}
 
 	library.exportIncludes(ctx, "-I")
@@ -505,12 +503,12 @@ func (library *libraryDecorator) getWholeStaticMissingDeps() []string {
 	return library.wholeStaticMissingDeps
 }
 
-func (library *libraryDecorator) objs() android.Paths {
-	return library.objFiles
+func (library *libraryDecorator) objs() Objects {
+	return library.objects
 }
 
-func (library *libraryDecorator) reuseObjs() android.Paths {
-	return library.reuseObjFiles
+func (library *libraryDecorator) reuseObjs() Objects {
+	return library.reuseObjects
 }
 
 func (library *libraryDecorator) toc() android.OptionalPath {

cc/linker.go

@@ -197,6 +197,6 @@ func (linker *baseLinker) linkerFlags(ctx ModuleContext, flags Flags) Flags {
 }
 
 func (linker *baseLinker) link(ctx ModuleContext,
-	flags Flags, deps PathDeps, objFiles android.Paths) android.Path {
+	flags Flags, deps PathDeps, objs Objects) android.Path {
 	panic(fmt.Errorf("baseLinker doesn't know how to link"))
 }

cc/ndk_library.go

@@ -189,7 +189,7 @@ func (c *stubDecorator) compilerInit(ctx BaseModuleContext) {
 	ndkMigratedLibs = append(ndkMigratedLibs, name)
 }
 
-func (c *stubDecorator) compile(ctx ModuleContext, flags Flags, deps PathDeps) android.Paths {
+func (c *stubDecorator) compile(ctx ModuleContext, flags Flags, deps PathDeps) Objects {
 	arch := ctx.Arch().ArchType.String()
 
 	if !strings.HasSuffix(ctx.ModuleName(), ndkLibrarySuffix) {
@@ -242,11 +242,11 @@ func (stub *stubDecorator) linkerFlags(ctx ModuleContext, flags Flags) Flags {
 }
 
 func (stub *stubDecorator) link(ctx ModuleContext, flags Flags, deps PathDeps,
-	objFiles android.Paths) android.Path {
+	objs Objects) android.Path {
 
 	linkerScriptFlag := "-Wl,--version-script," + stub.versionScriptPath.String()
 	flags.LdFlags = append(flags.LdFlags, linkerScriptFlag)
-	return stub.libraryDecorator.link(ctx, flags, deps, objFiles)
+	return stub.libraryDecorator.link(ctx, flags, deps, objs)
 }
 
 func (stub *stubDecorator) install(ctx ModuleContext, path android.Path) {

cc/ndk_prebuilt.go

@@ -79,7 +79,7 @@ func ndkPrebuiltObjectFactory() (blueprint.Module, []interface{}) {
 }
 
 func (c *ndkPrebuiltObjectLinker) link(ctx ModuleContext, flags Flags,
-	deps PathDeps, objFiles android.Paths) android.Path {
+	deps PathDeps, objs Objects) android.Path {
 	// A null build step, but it sets up the output path.
 	if !strings.HasPrefix(ctx.ModuleName(), "ndk_crt") {
 		ctx.ModuleErrorf("NDK prebuilts must have an ndk_crt prefixed name")
@@ -115,7 +115,7 @@ func ndkPrebuiltLibraryFactory() (blueprint.Module, []interface{}) {
 }
 
 func (ndk *ndkPrebuiltLibraryLinker) link(ctx ModuleContext, flags Flags,
-	deps PathDeps, objFiles android.Paths) android.Path {
+	deps PathDeps, objs Objects) android.Path {
 	// A null build step, but it sets up the output path.
 	ndk.exportIncludes(ctx, "-isystem")
 
@@ -181,7 +181,7 @@ func getNdkStlLibDir(ctx android.ModuleContext, toolchain config.Toolchain, stl
 }
 
 func (ndk *ndkPrebuiltStlLinker) link(ctx ModuleContext, flags Flags,
-	deps PathDeps, objFiles android.Paths) android.Path {
+	deps PathDeps, objs Objects) android.Path {
 	// A null build step, but it sets up the output path.
 	if !strings.HasPrefix(ctx.ModuleName(), "ndk_lib") {
 		ctx.ModuleErrorf("NDK prebuilts must have an ndk_lib prefixed name")

cc/object.go

@@ -70,16 +70,16 @@ func (*objectLinker) linkerFlags(ctx ModuleContext, flags Flags) Flags {
 }
 
 func (object *objectLinker) link(ctx ModuleContext,
-	flags Flags, deps PathDeps, objFiles android.Paths) android.Path {
+	flags Flags, deps PathDeps, objs Objects) android.Path {
 
-	objFiles = append(objFiles, deps.ObjFiles...)
+	objs = objs.Append(deps.Objs)
 
 	var outputFile android.Path
-	if len(objFiles) == 1 {
-		outputFile = objFiles[0]
+	if len(objs.objFiles) == 1 {
+		outputFile = objs.objFiles[0]
 	} else {
 		output := android.PathForModuleOut(ctx, ctx.ModuleName()+objectExtension)
-		TransformObjsToObj(ctx, objFiles, flagsToBuilderFlags(flags), output)
+		TransformObjsToObj(ctx, objs.objFiles, flagsToBuilderFlags(flags), output)
 		outputFile = output
 	}
 

cc/prebuilt.go

@@ -46,7 +46,7 @@ func (p *prebuiltLibraryLinker) linkerProps() []interface{} {
 }
 
 func (p *prebuiltLibraryLinker) link(ctx ModuleContext,
-	flags Flags, deps PathDeps, objFiles android.Paths) android.Path {
+	flags Flags, deps PathDeps, objs Objects) android.Path {
 	// TODO(ccross): verify shared library dependencies
 	if len(p.Prebuilt.Properties.Srcs) > 0 {
 		p.libraryDecorator.exportIncludes(ctx, "-I")

cc/toolchain_library.go

@@ -53,12 +53,12 @@ func toolchainLibraryFactory() (blueprint.Module, []interface{}) {
 }
 
 func (library *toolchainLibraryDecorator) compile(ctx ModuleContext, flags Flags,
-	deps PathDeps) android.Paths {
-	return nil
+	deps PathDeps) Objects {
+	return Objects{}
 }
 
 func (library *toolchainLibraryDecorator) link(ctx ModuleContext,
-	flags Flags, deps PathDeps, objFiles android.Paths) android.Path {
+	flags Flags, deps PathDeps, objs Objects) android.Path {
 
 	libName := ctx.ModuleName() + staticLibraryExtension
 	outputFile := android.PathForModuleOut(ctx, libName)