Add top level and per-mutator traces to soong_build
- Top-level trace for all soong_build runs
- Includes adding Peek() to OncePer because not all soong_build
invocations have GenerateBuildActions run.
- A trace per mutator invocation
Test: m && build/bazel/scripts/print_analysis_metrics.py
Change-Id: Ief5c04630484fb38ec7e3757de45c7dc294d3b3c
diff --git a/android/onceper.go b/android/onceper.go
index 481cdea..fa415d1 100644
--- a/android/onceper.go
+++ b/android/onceper.go
@@ -79,6 +79,17 @@
return once.maybeWaitFor(key, v)
}
+// Peek returns the value previously computed with Once for a given key. If Once has not
+// been called for the given key Peek will return ok == false.
+func (once *OncePer) Peek(key OnceKey) (interface{}, bool) {
+ v, ok := once.values.Load(key)
+ if !ok {
+ return nil, false
+ }
+
+ return once.maybeWaitFor(key, v), true
+}
+
// OnceStringSlice is the same as Once, but returns the value cast to a []string
func (once *OncePer) OnceStringSlice(key OnceKey, value func() []string) []string {
return once.Once(key, func() interface{} { return value() }).([]string)