Refactor mixed builds to only take one pass
This large refactoring has both immense performance implications and
improves mixed builds complexity / usability. Summary:
1. Queueing calls to Bazel is done in a new mutator instead of a full
soong_build pass. Normal soong_build flow is interrupted (via a
functional hook in blueprint) to invoke bazel and parse its response.
2. Implementing mixed build support for additional modules is as simple
as implementing MixedBuildsBuildable. In this interface, define the
request that must be queued to Bazel, and then subsequently define
how to handle the returned bazel cquery metadata.
3. Mixed builds consists of only a single pass. This greatly
improves mixed build performance.
Result:
A 33% runtime improvement on soong analysis phase with mixed builds.
Caveats:
C++ BazelHandler handling still remains a bit of a mess; I did what
I could within this CL's scope, but this may require additional cleanup.
Test: Treehugger
Test: Verified that aosp_arm ninja file is bit-for-bit identical with or
without this change.
Change-Id: I412d9c94d429105f4ebfafc84100d546069e6621
diff --git a/cc/library.go b/cc/library.go
index fdbbccb..5746529 100644
--- a/cc/library.go
+++ b/cc/library.go
@@ -642,18 +642,18 @@
}
type ccLibraryBazelHandler struct {
- android.BazelHandler
+ BazelHandler
module *Module
}
// generateStaticBazelBuildActions constructs the StaticLibraryInfo Soong
// provider from a Bazel shared library's CcInfo provider.
-func (handler *ccLibraryBazelHandler) generateStaticBazelBuildActions(ctx android.ModuleContext, label string, ccInfo cquery.CcInfo) bool {
+func (handler *ccLibraryBazelHandler) generateStaticBazelBuildActions(ctx android.ModuleContext, label string, ccInfo cquery.CcInfo) {
rootStaticArchives := ccInfo.RootStaticArchives
if len(rootStaticArchives) != 1 {
ctx.ModuleErrorf("expected exactly one root archive file for '%s', but got %s", label, rootStaticArchives)
- return false
+ return
}
outputFilePath := android.PathForBazelOut(ctx, rootStaticArchives[0])
handler.module.outputFile = android.OptionalPathForPath(outputFilePath)
@@ -679,17 +679,17 @@
Build(),
})
- return true
+ return
}
// generateSharedBazelBuildActions constructs the SharedLibraryInfo Soong
// provider from a Bazel shared library's CcInfo provider.
-func (handler *ccLibraryBazelHandler) generateSharedBazelBuildActions(ctx android.ModuleContext, label string, ccInfo cquery.CcInfo) bool {
+func (handler *ccLibraryBazelHandler) generateSharedBazelBuildActions(ctx android.ModuleContext, label string, ccInfo cquery.CcInfo) {
rootDynamicLibraries := ccInfo.RootDynamicLibraries
if len(rootDynamicLibraries) != 1 {
ctx.ModuleErrorf("expected exactly one root dynamic library file for '%s', but got %s", label, rootDynamicLibraries)
- return false
+ return
}
outputFilePath := android.PathForBazelOut(ctx, rootDynamicLibraries[0])
handler.module.outputFile = android.OptionalPathForPath(outputFilePath)
@@ -709,30 +709,27 @@
// TODO(b/190524881): Include transitive static libraries in this provider to support
// static libraries with deps. The provider key for this is TransitiveStaticLibrariesForOrdering.
})
- return true
}
-func (handler *ccLibraryBazelHandler) GenerateBazelBuildActions(ctx android.ModuleContext, label string) bool {
+func (handler *ccLibraryBazelHandler) QueueBazelCall(ctx android.BaseModuleContext, label string) {
bazelCtx := ctx.Config().BazelContext
- ccInfo, ok, err := bazelCtx.GetCcInfo(label, android.GetConfigKey(ctx))
+ bazelCtx.QueueBazelRequest(label, cquery.GetCcInfo, android.GetConfigKey(ctx))
+}
+
+func (handler *ccLibraryBazelHandler) ProcessBazelQueryResponse(ctx android.ModuleContext, label string) {
+ bazelCtx := ctx.Config().BazelContext
+ ccInfo, err := bazelCtx.GetCcInfo(label, android.GetConfigKey(ctx))
if err != nil {
ctx.ModuleErrorf("Error getting Bazel CcInfo: %s", err)
- return false
- }
- if !ok {
- return ok
+ return
}
if handler.module.static() {
- if ok := handler.generateStaticBazelBuildActions(ctx, label, ccInfo); !ok {
- return false
- }
+ handler.generateStaticBazelBuildActions(ctx, label, ccInfo)
} else if handler.module.Shared() {
- if ok := handler.generateSharedBazelBuildActions(ctx, label, ccInfo); !ok {
- return false
- }
+ handler.generateSharedBazelBuildActions(ctx, label, ccInfo)
} else {
- return false
+ ctx.ModuleErrorf("Unhandled bazel case for %s (neither shared nor static!)", ctx.ModuleName())
}
handler.module.linker.(*libraryDecorator).setFlagExporterInfoFromCcInfo(ctx, ccInfo)
@@ -746,7 +743,6 @@
// implementation.
i.(*libraryDecorator).collectedSnapshotHeaders = android.Paths{}
}
- return ok
}
func (library *libraryDecorator) setFlagExporterInfoFromCcInfo(ctx android.ModuleContext, ccInfo cquery.CcInfo) {