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Use a versioned profile file if available

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Bug: http://b/74395273

Update profile-search logic to look for profile files named
<profile_file>.<arbitrary-version> in the profileProject and use that if
available.  This works around an issue where ccache serves stale cache
entries when the profile file has changed.

Test: touch toolchain/pgo-profiles/art/dex2oat.profdata.foo and check it
gets used.

Change-Id: I3de095c263b952cede25af7d0b63dc7280914d76
This commit is contained in:
Pirama Arumuga Nainar 2018-03-08 22:56:37 -08:00
parent e9b02776f4
commit 8aed42c798
1 changed files with 24 additions and 1 deletions
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25
cc/pgo.go
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@ -16,6 +16,7 @@ package cc
import (
"fmt"
"path/filepath"
"strings"
"android/soong/android"
@ -100,12 +101,34 @@ func (props *PgoProperties) addProfileGatherFlags(ctx ModuleContext, flags Flags
}
func (props *PgoProperties) getPgoProfileFile(ctx BaseModuleContext) android.OptionalPath {
profile_file := *props.Pgo.Profile_file
// Test if the profile_file is present in any of the PGO profile projects
for _, profileProject := range getPgoProfileProjects(ctx.DeviceConfig()) {
path := android.ExistentPathForSource(ctx, profileProject, *props.Pgo.Profile_file)
// Bug: http://b/74395273 If the profile_file is unavailable,
// use a versioned file named
// <profile_file>.<arbitrary-version> when available. This
// works around an issue where ccache serves stale cache
// entries when the profile file has changed.
globPattern := filepath.Join(profileProject, profile_file+".*")
versioned_profiles, err := ctx.GlobWithDeps(globPattern, nil)
if err != nil {
ctx.ModuleErrorf("glob: %s", err.Error())
}
path := android.ExistentPathForSource(ctx, profileProject, profile_file)
if path.Valid() {
if len(versioned_profiles) != 0 {
ctx.PropertyErrorf("pgo.profile_file", "Profile_file has multiple versions: "+filepath.Join(profileProject, profile_file)+", "+strings.Join(versioned_profiles, ", "))
}
return path
}
if len(versioned_profiles) > 1 {
ctx.PropertyErrorf("pgo.profile_file", "Profile_file has multiple versions: "+strings.Join(versioned_profiles, ", "))
} else if len(versioned_profiles) == 1 {
return android.OptionalPathForPath(android.PathForSource(ctx, versioned_profiles[0]))
}
}
// Record that this module's profile file is absent