Start using Providers instead of direct module access
Export information about static libraries, shared libraries and
exported flags through Providers instead of accessing the module
directly. Much more is left to be converted, but this significantly
simplifies the dependencies on libraries with stubs by making it easy
for a module to masquerade as another by simply exporting the
providers from the other module. Instead of depending on all the
versions of a library and then picking which one to use later, it
can depend only on the implementation variant and then select the
right SharedLibraryInfo from the variant.
Test: m checkbuild
Test: only expected changes to build.ninja
Change-Id: I1fd9eb4d251cf96ed8398d586efc3e0817663c76
diff --git a/cc/library.go b/cc/library.go
index 35828aa..3a46b11 100644
--- a/cc/library.go
+++ b/cc/library.go
@@ -291,36 +291,16 @@
f.headers = append(f.headers, headers...)
}
-func (f *flagExporter) exportedDirs() android.Paths {
- return f.dirs
+func (f *flagExporter) setProvider(ctx android.ModuleContext) {
+ ctx.SetProvider(FlagExporterInfoProvider, FlagExporterInfo{
+ IncludeDirs: f.dirs,
+ SystemIncludeDirs: f.systemDirs,
+ Flags: f.flags,
+ Deps: f.deps,
+ GeneratedHeaders: f.headers,
+ })
}
-func (f *flagExporter) exportedSystemDirs() android.Paths {
- return f.systemDirs
-}
-
-func (f *flagExporter) exportedFlags() []string {
- return f.flags
-}
-
-func (f *flagExporter) exportedDeps() android.Paths {
- return f.deps
-}
-
-func (f *flagExporter) exportedGeneratedHeaders() android.Paths {
- return f.headers
-}
-
-type exportedFlagsProducer interface {
- exportedDirs() android.Paths
- exportedSystemDirs() android.Paths
- exportedFlags() []string
- exportedDeps() android.Paths
- exportedGeneratedHeaders() android.Paths
-}
-
-var _ exportedFlagsProducer = (*flagExporter)(nil)
-
// libraryDecorator wraps baseCompiler, baseLinker and baseInstaller to provide library-specific
// functionality: static vs. shared linkage, reusing object files for shared libraries
type libraryDecorator struct {
@@ -396,7 +376,7 @@
// can't be globbed, and they should be manually collected.
// So, we first filter out intermediate directories (which contains generated headers)
// from exported directories, and then glob headers under remaining directories.
- for _, path := range append(l.exportedDirs(), l.exportedSystemDirs()...) {
+ for _, path := range append(android.CopyOfPaths(l.flagExporter.dirs), l.flagExporter.systemDirs...) {
dir := path.String()
// Skip if dir is for generated headers
if strings.HasPrefix(dir, android.PathForOutput(ctx).String()) {
@@ -448,7 +428,7 @@
}
// Collect generated headers
- for _, header := range append(l.exportedGeneratedHeaders(), l.exportedDeps()...) {
+ for _, header := range append(android.CopyOfPaths(l.flagExporter.headers), l.flagExporter.deps...) {
// TODO(b/148123511): remove exportedDeps after cleaning up genrule
if strings.HasSuffix(header.Base(), "-phony") {
continue
@@ -681,7 +661,7 @@
static() bool
shared() bool
objs() Objects
- reuseObjs() (Objects, exportedFlagsProducer)
+ reuseObjs() Objects
toc() android.OptionalPath
// Returns true if the build options for the module have selected a static or shared build
@@ -886,6 +866,17 @@
ctx.CheckbuildFile(outputFile)
+ ctx.SetProvider(StaticLibraryInfoProvider, StaticLibraryInfo{
+ StaticLibrary: outputFile,
+ ReuseObjects: library.reuseObjects,
+ Objects: library.objects,
+
+ TransitiveStaticLibrariesForOrdering: android.NewDepSetBuilder(android.TOPOLOGICAL).
+ Direct(outputFile).
+ Transitive(deps.TranstiveStaticLibrariesForOrdering).
+ Build(),
+ })
+
return outputFile
}
@@ -930,7 +921,7 @@
fileName := library.getLibName(ctx) + flags.Toolchain.ShlibSuffix()
outputFile := android.PathForModuleOut(ctx, fileName)
- ret := outputFile
+ unstrippedOutputFile := outputFile
var implicitOutputs android.WritablePaths
if ctx.Windows() {
@@ -1012,9 +1003,42 @@
objs.sAbiDumpFiles = append(objs.sAbiDumpFiles, deps.WholeStaticLibObjs.sAbiDumpFiles...)
library.coverageOutputFile = TransformCoverageFilesToZip(ctx, objs, library.getLibName(ctx))
- library.linkSAbiDumpFiles(ctx, objs, fileName, ret)
+ library.linkSAbiDumpFiles(ctx, objs, fileName, unstrippedOutputFile)
- return ret
+ var staticAnalogue *StaticLibraryInfo
+ if static := ctx.GetDirectDepsWithTag(staticVariantTag); len(static) > 0 {
+ s := ctx.OtherModuleProvider(static[0], StaticLibraryInfoProvider).(StaticLibraryInfo)
+ staticAnalogue = &s
+ }
+
+ ctx.SetProvider(SharedLibraryInfoProvider, SharedLibraryInfo{
+ TableOfContents: android.OptionalPathForPath(tocFile),
+ SharedLibrary: unstrippedOutputFile,
+ UnstrippedSharedLibrary: library.unstrippedOutputFile,
+ CoverageSharedLibrary: library.coverageOutputFile,
+ StaticAnalogue: staticAnalogue,
+ })
+
+ stubs := ctx.GetDirectDepsWithTag(stubImplDepTag)
+ if len(stubs) > 0 {
+ var stubsInfo []SharedLibraryStubsInfo
+ for _, stub := range stubs {
+ stubInfo := ctx.OtherModuleProvider(stub, SharedLibraryInfoProvider).(SharedLibraryInfo)
+ flagInfo := ctx.OtherModuleProvider(stub, FlagExporterInfoProvider).(FlagExporterInfo)
+ stubsInfo = append(stubsInfo, SharedLibraryStubsInfo{
+ Version: stub.(*Module).StubsVersion(),
+ SharedLibraryInfo: stubInfo,
+ FlagExporterInfo: flagInfo,
+ })
+ }
+ ctx.SetProvider(SharedLibraryImplementationStubsInfoProvider, SharedLibraryImplementationStubsInfo{
+ SharedLibraryStubsInfos: stubsInfo,
+
+ IsLLNDK: ctx.isLlndk(ctx.Config()),
+ })
+ }
+
+ return unstrippedOutputFile
}
func (library *libraryDecorator) unstrippedOutputFilePath() android.Path {
@@ -1162,6 +1186,8 @@
library.reexportFlags("-D" + versioningMacroName(ctx.ModuleName()) + "=" + library.stubsVersion())
}
+ library.flagExporter.setProvider(ctx)
+
return out
}
@@ -1179,8 +1205,8 @@
return library.objects
}
-func (library *libraryDecorator) reuseObjs() (Objects, exportedFlagsProducer) {
- return library.reuseObjects, &library.flagExporter
+func (library *libraryDecorator) reuseObjs() Objects {
+ return library.reuseObjects
}
func (library *libraryDecorator) toc() android.OptionalPath {
@@ -1423,10 +1449,10 @@
sharedCompiler.baseCompiler.Properties.Srcs
sharedCompiler.baseCompiler.Properties.Srcs = nil
sharedCompiler.baseCompiler.Properties.Generated_sources = nil
- } else {
- // This dep is just to reference static variant from shared variant
- mctx.AddInterVariantDependency(staticVariantTag, shared, static)
}
+
+ // This dep is just to reference static variant from shared variant
+ mctx.AddInterVariantDependency(staticVariantTag, shared, static)
}
}
@@ -1525,15 +1551,15 @@
func createVersionVariations(mctx android.BottomUpMutatorContext, versions []string) {
// "" is for the non-stubs (implementation) variant.
- variants := append([]string{""}, versions...)
+ variants := append(android.CopyOf(versions), "")
modules := mctx.CreateLocalVariations(variants...)
for i, m := range modules {
if variants[i] != "" {
m.(LinkableInterface).SetBuildStubs()
m.(LinkableInterface).SetStubsVersion(variants[i])
- // The stubs depend on the implementation
- mctx.AddInterVariantDependency(stubImplDepTag, modules[i], modules[0])
+ // The implementation depends on the stubs
+ mctx.AddInterVariantDependency(stubImplDepTag, modules[len(modules)-1], modules[i])
}
}
mctx.AliasVariation("")
@@ -1570,9 +1596,7 @@
// and propagates the value from implementation libraries to llndk libraries with the same name.
func versionSelectorMutator(mctx android.BottomUpMutatorContext) {
if library, ok := mctx.Module().(LinkableInterface); ok && CanBeVersionVariant(library) {
-
- if library.CcLibrary() && library.BuildSharedVariant() && len(library.StubsVersions()) > 0 &&
- !library.IsSdkVariant() {
+ if library.CcLibrary() && library.BuildSharedVariant() && len(library.StubsVersions()) > 0 {
versions := library.StubsVersions()
normalizeVersions(mctx, versions)