Add platform-wide sampling PGO option
This causes the compiler to emit some additional debug infomation that
will be used for sampling PGO. These debug infomation will get stripped
so it only affects intermediate files.
Test: build
Bug: 79161490
Bug: 153039105
Change-Id: Ie4d1d5ffbd311ba6e268cb94a618f5272be246ef
Merged-In: Ie4d1d5ffbd311ba6e268cb94a618f5272be246ef
(cherry picked from commit ceb5b76c91817c90818f0f6700124debc83821de)
diff --git a/android/config.go b/android/config.go
index 32e32ae..c9d7dab 100644
--- a/android/config.go
+++ b/android/config.go
@@ -1031,6 +1031,10 @@
return c.config.productVariables.DeviceKernelHeaders
}
+func (c *deviceConfig) SamplingPGO() bool {
+ return Bool(c.config.productVariables.SamplingPGO)
+}
+
func (c *config) NativeLineCoverage() bool {
return Bool(c.productVariables.NativeLineCoverage)
}
diff --git a/android/variable.go b/android/variable.go
index 9cbe624..06bd4ed 100644
--- a/android/variable.go
+++ b/android/variable.go
@@ -251,6 +251,8 @@
ClangTidy *bool `json:",omitempty"`
TidyChecks *string `json:",omitempty"`
+ SamplingPGO *bool `json:",omitempty"`
+
NativeLineCoverage *bool `json:",omitempty"`
Native_coverage *bool `json:",omitempty"`
ClangCoverage *bool `json:",omitempty"`
diff --git a/cc/pgo.go b/cc/pgo.go
index d5c4b87..88903bb 100644
--- a/cc/pgo.go
+++ b/cc/pgo.go
@@ -88,20 +88,21 @@
return []interface{}{&pgo.Properties}
}
-func (props *PgoProperties) addProfileGatherFlags(ctx ModuleContext, flags Flags) Flags {
+func (props *PgoProperties) addInstrumentationProfileGatherFlags(ctx ModuleContext, flags Flags) Flags {
flags.Local.CFlags = append(flags.Local.CFlags, props.Pgo.Cflags...)
- if props.isInstrumentation() {
- flags.Local.CFlags = append(flags.Local.CFlags, profileInstrumentFlag)
- // The profile runtime is added below in deps(). Add the below
- // flag, which is the only other link-time action performed by
- // the Clang driver during link.
- flags.Local.LdFlags = append(flags.Local.LdFlags, "-u__llvm_profile_runtime")
- }
- if props.isSampling() {
- flags.Local.CFlags = append(flags.Local.CFlags, profileSamplingFlag)
- flags.Local.LdFlags = append(flags.Local.LdFlags, profileSamplingFlag)
- }
+ flags.Local.CFlags = append(flags.Local.CFlags, profileInstrumentFlag)
+ // The profile runtime is added below in deps(). Add the below
+ // flag, which is the only other link-time action performed by
+ // the Clang driver during link.
+ flags.Local.LdFlags = append(flags.Local.LdFlags, "-u__llvm_profile_runtime")
+ return flags
+}
+func (props *PgoProperties) addSamplingProfileGatherFlags(ctx ModuleContext, flags Flags) Flags {
+ flags.Local.CFlags = append(flags.Local.CFlags, props.Pgo.Cflags...)
+
+ flags.Local.CFlags = append(flags.Local.CFlags, profileSamplingFlag)
+ flags.Local.LdFlags = append(flags.Local.LdFlags, profileSamplingFlag)
return flags
}
@@ -286,8 +287,12 @@
props := pgo.Properties
// Add flags to profile this module based on its profile_kind
- if props.ShouldProfileModule {
- return props.addProfileGatherFlags(ctx, flags)
+ if props.ShouldProfileModule && props.isInstrumentation() {
+ return props.addInstrumentationProfileGatherFlags(ctx, flags)
+ } else if props.ShouldProfileModule && props.isSampling() {
+ return props.addSamplingProfileGatherFlags(ctx, flags)
+ } else if ctx.DeviceConfig().SamplingPGO() {
+ return props.addSamplingProfileGatherFlags(ctx, flags)
}
if !ctx.Config().IsEnvTrue("ANDROID_PGO_NO_PROFILE_USE") {