Merge "Separate LLNDK from the platform library dumps" into main
diff --git a/apex/apex_test.go b/apex/apex_test.go
index 7e67c0f..d3959ec 100644
--- a/apex/apex_test.go
+++ b/apex/apex_test.go
@@ -1455,6 +1455,7 @@
name: "libc",
no_libcrt: true,
nocrt: true,
+ no_crt_pad_segment: true,
stl: "none",
system_shared_libs: [],
stubs: { versions: ["1"] },
@@ -1469,6 +1470,7 @@
name: "libclang_rt.hwasan",
no_libcrt: true,
nocrt: true,
+ no_crt_pad_segment: true,
stl: "none",
system_shared_libs: [],
srcs: [""],
@@ -1511,6 +1513,7 @@
name: "libc",
no_libcrt: true,
nocrt: true,
+ no_crt_pad_segment: true,
stl: "none",
system_shared_libs: [],
stubs: { versions: ["1"] },
@@ -1521,6 +1524,7 @@
name: "libclang_rt.hwasan",
no_libcrt: true,
nocrt: true,
+ no_crt_pad_segment: true,
stl: "none",
system_shared_libs: [],
srcs: [""],
@@ -3768,13 +3772,6 @@
"lib64/libvndk.so",
"lib64/libvndksp.so"),
},
- {
- vndkVersion: "",
- expectedFiles: append(commonFiles,
- // Legacy VNDK APEX contains only VNDK-SP files (of core variant)
- "lib/libvndksp.so",
- "lib64/libvndksp.so"),
- },
}
for _, tc := range testCases {
t.Run("VNDK.current with DeviceVndkVersion="+tc.vndkVersion, func(t *testing.T) {
diff --git a/apex/dexpreopt_bootjars_test.go b/apex/dexpreopt_bootjars_test.go
index d9ab8fa..7a17f50 100644
--- a/apex/dexpreopt_bootjars_test.go
+++ b/apex/dexpreopt_bootjars_test.go
@@ -164,6 +164,7 @@
"out/soong/dexpreopt_arm64/dex_bootjars_input/baz.jar",
"out/soong/.intermediates/art-bootclasspath-fragment/android_common_apex10000/art-bootclasspath-fragment/boot.prof",
"out/soong/.intermediates/default/java/dex_bootjars/android_common/boot/boot.prof",
+ "out/soong/dexpreopt/uffd_gc_flag.txt",
}
expectedOutputs := []string{
@@ -201,6 +202,7 @@
"out/soong/dexpreopt_arm64/dex_bootjars_input/baz.jar",
"out/soong/.intermediates/prebuilt_com.android.art.deapexer/android_common/deapexer/etc/boot-image.prof",
"out/soong/.intermediates/default/java/dex_bootjars/android_common/boot/boot.prof",
+ "out/soong/dexpreopt/uffd_gc_flag.txt",
}
expectedOutputs := []string{
diff --git a/apex/vndk_test.go b/apex/vndk_test.go
index e2aee96..894aece 100644
--- a/apex/vndk_test.go
+++ b/apex/vndk_test.go
@@ -8,66 +8,6 @@
"android/soong/android"
)
-func TestVndkApexForVndkLite(t *testing.T) {
- ctx := testApex(t, `
- apex_vndk {
- name: "com.android.vndk.current",
- key: "com.android.vndk.current.key",
- updatable: false,
- }
-
- apex_key {
- name: "com.android.vndk.current.key",
- public_key: "testkey.avbpubkey",
- private_key: "testkey.pem",
- }
-
- cc_library {
- name: "libvndk",
- srcs: ["mylib.cpp"],
- vendor_available: true,
- product_available: true,
- vndk: {
- enabled: true,
- },
- system_shared_libs: [],
- stl: "none",
- apex_available: [ "com.android.vndk.current" ],
- }
-
- cc_library {
- name: "libvndksp",
- srcs: ["mylib.cpp"],
- vendor_available: true,
- product_available: true,
- vndk: {
- enabled: true,
- support_system_process: true,
- },
- system_shared_libs: [],
- stl: "none",
- apex_available: [ "com.android.vndk.current" ],
- }
- `+vndkLibrariesTxtFiles("current"),
- android.FixtureModifyProductVariables(func(variables android.FixtureProductVariables) {
- variables.DeviceVndkVersion = proptools.StringPtr("")
- variables.KeepVndk = proptools.BoolPtr(true)
- }),
- )
- // VNDK-Lite contains only core variants of VNDK-Sp libraries
- ensureExactContents(t, ctx, "com.android.vndk.current", "android_common", []string{
- "lib/libvndksp.so",
- "lib/libc++.so",
- "lib64/libvndksp.so",
- "lib64/libc++.so",
- "etc/llndk.libraries.29.txt",
- "etc/vndkcore.libraries.29.txt",
- "etc/vndksp.libraries.29.txt",
- "etc/vndkprivate.libraries.29.txt",
- "etc/vndkproduct.libraries.29.txt",
- })
-}
-
func TestVndkApexUsesVendorVariant(t *testing.T) {
bp := `
apex_vndk {
diff --git a/cc/androidmk.go b/cc/androidmk.go
index c39668c..20673e8 100644
--- a/cc/androidmk.go
+++ b/cc/androidmk.go
@@ -107,7 +107,6 @@
}
entries.SetString("LOCAL_SOONG_LINK_TYPE", c.makeLinkType)
if c.InVendorOrProduct() {
- entries.SetBool("LOCAL_USE_VNDK", true)
if c.IsVndk() && !c.static() {
entries.SetString("LOCAL_SOONG_VNDK_VERSION", c.VndkVersion())
// VNDK libraries available to vendor are not installed because
@@ -117,6 +116,11 @@
}
}
}
+ if c.InVendor() {
+ entries.SetBool("LOCAL_IN_VENDOR", true)
+ } else if c.InProduct() {
+ entries.SetBool("LOCAL_IN_PRODUCT", true)
+ }
if c.Properties.IsSdkVariant && c.Properties.SdkAndPlatformVariantVisibleToMake {
// Make the SDK variant uninstallable so that there are not two rules to install
// to the same location.
diff --git a/cc/config/bionic.go b/cc/config/bionic.go
index a1e3851..ed724f5 100644
--- a/cc/config/bionic.go
+++ b/cc/config/bionic.go
@@ -24,6 +24,7 @@
bionicCrtBeginStaticBinary, bionicCrtEndStaticBinary = []string{"crtbegin_static"}, []string{"crtend_android"}
bionicCrtBeginSharedBinary, bionicCrtEndSharedBinary = []string{"crtbegin_dynamic"}, []string{"crtend_android"}
bionicCrtBeginSharedLibrary, bionicCrtEndSharedLibrary = []string{"crtbegin_so"}, []string{"crtend_so"}
+ bionicCrtPadSegmentSharedLibrary = []string{"crt_pad_segment"}
)
func (toolchainBionic) Bionic() bool { return true }
@@ -36,9 +37,10 @@
func (toolchainBionic) AvailableLibraries() []string { return nil }
-func (toolchainBionic) CrtBeginStaticBinary() []string { return bionicCrtBeginStaticBinary }
-func (toolchainBionic) CrtBeginSharedBinary() []string { return bionicCrtBeginSharedBinary }
-func (toolchainBionic) CrtBeginSharedLibrary() []string { return bionicCrtBeginSharedLibrary }
-func (toolchainBionic) CrtEndStaticBinary() []string { return bionicCrtEndStaticBinary }
-func (toolchainBionic) CrtEndSharedBinary() []string { return bionicCrtEndSharedBinary }
-func (toolchainBionic) CrtEndSharedLibrary() []string { return bionicCrtEndSharedLibrary }
+func (toolchainBionic) CrtBeginStaticBinary() []string { return bionicCrtBeginStaticBinary }
+func (toolchainBionic) CrtBeginSharedBinary() []string { return bionicCrtBeginSharedBinary }
+func (toolchainBionic) CrtBeginSharedLibrary() []string { return bionicCrtBeginSharedLibrary }
+func (toolchainBionic) CrtEndStaticBinary() []string { return bionicCrtEndStaticBinary }
+func (toolchainBionic) CrtEndSharedBinary() []string { return bionicCrtEndSharedBinary }
+func (toolchainBionic) CrtEndSharedLibrary() []string { return bionicCrtEndSharedLibrary }
+func (toolchainBionic) CrtPadSegmentSharedLibrary() []string { return bionicCrtPadSegmentSharedLibrary }
diff --git a/cc/config/toolchain.go b/cc/config/toolchain.go
index 62f75d1..71e98fe 100644
--- a/cc/config/toolchain.go
+++ b/cc/config/toolchain.go
@@ -100,6 +100,7 @@
CrtEndStaticBinary() []string
CrtEndSharedBinary() []string
CrtEndSharedLibrary() []string
+ CrtPadSegmentSharedLibrary() []string
// DefaultSharedLibraries returns the list of shared libraries that will be added to all
// targets unless they explicitly specify system_shared_libs.
@@ -155,12 +156,13 @@
type toolchainNoCrt struct{}
-func (toolchainNoCrt) CrtBeginStaticBinary() []string { return nil }
-func (toolchainNoCrt) CrtBeginSharedBinary() []string { return nil }
-func (toolchainNoCrt) CrtBeginSharedLibrary() []string { return nil }
-func (toolchainNoCrt) CrtEndStaticBinary() []string { return nil }
-func (toolchainNoCrt) CrtEndSharedBinary() []string { return nil }
-func (toolchainNoCrt) CrtEndSharedLibrary() []string { return nil }
+func (toolchainNoCrt) CrtBeginStaticBinary() []string { return nil }
+func (toolchainNoCrt) CrtBeginSharedBinary() []string { return nil }
+func (toolchainNoCrt) CrtBeginSharedLibrary() []string { return nil }
+func (toolchainNoCrt) CrtEndStaticBinary() []string { return nil }
+func (toolchainNoCrt) CrtEndSharedBinary() []string { return nil }
+func (toolchainNoCrt) CrtEndSharedLibrary() []string { return nil }
+func (toolchainNoCrt) CrtPadSegmentSharedLibrary() []string { return nil }
func (toolchainBase) DefaultSharedLibraries() []string {
return nil
diff --git a/cc/config/x86_linux_host.go b/cc/config/x86_linux_host.go
index f95da0b..f497bf9 100644
--- a/cc/config/x86_linux_host.go
+++ b/cc/config/x86_linux_host.go
@@ -328,12 +328,13 @@
func (toolchainMusl) Musl() bool { return true }
-func (toolchainMusl) CrtBeginStaticBinary() []string { return muslCrtBeginStaticBinary }
-func (toolchainMusl) CrtBeginSharedBinary() []string { return muslCrtBeginSharedBinary }
-func (toolchainMusl) CrtBeginSharedLibrary() []string { return muslCrtBeginSharedLibrary }
-func (toolchainMusl) CrtEndStaticBinary() []string { return muslCrtEndStaticBinary }
-func (toolchainMusl) CrtEndSharedBinary() []string { return muslCrtEndSharedBinary }
-func (toolchainMusl) CrtEndSharedLibrary() []string { return muslCrtEndSharedLibrary }
+func (toolchainMusl) CrtBeginStaticBinary() []string { return muslCrtBeginStaticBinary }
+func (toolchainMusl) CrtBeginSharedBinary() []string { return muslCrtBeginSharedBinary }
+func (toolchainMusl) CrtBeginSharedLibrary() []string { return muslCrtBeginSharedLibrary }
+func (toolchainMusl) CrtEndStaticBinary() []string { return muslCrtEndStaticBinary }
+func (toolchainMusl) CrtEndSharedBinary() []string { return muslCrtEndSharedBinary }
+func (toolchainMusl) CrtEndSharedLibrary() []string { return muslCrtEndSharedLibrary }
+func (toolchainMusl) CrtPadSegmentSharedLibrary() []string { return nil }
func (toolchainMusl) DefaultSharedLibraries() []string { return MuslDefaultSharedLibraries }
diff --git a/cc/library.go b/cc/library.go
index 9990138..4684d32 100644
--- a/cc/library.go
+++ b/cc/library.go
@@ -974,6 +974,10 @@
if library.baseLinker.Properties.crt() {
deps.CrtBegin = append(deps.CrtBegin, ctx.toolchain().CrtBeginSharedLibrary()...)
deps.CrtEnd = append(deps.CrtEnd, ctx.toolchain().CrtEndSharedLibrary()...)
+
+ }
+ if library.baseLinker.Properties.crtPadSegment() {
+ deps.CrtEnd = append(deps.CrtEnd, ctx.toolchain().CrtPadSegmentSharedLibrary()...)
}
deps.WholeStaticLibs = append(deps.WholeStaticLibs, library.SharedProperties.Shared.Whole_static_libs...)
deps.StaticLibs = append(deps.StaticLibs, library.SharedProperties.Shared.Static_libs...)
diff --git a/cc/linker.go b/cc/linker.go
index 85c128e..2c50db2 100644
--- a/cc/linker.go
+++ b/cc/linker.go
@@ -91,6 +91,10 @@
// compiling crt or libc.
Nocrt *bool `android:"arch_variant"`
+ // don't link in crt_pad_segment. This flag is currently only used internal to
+ // soong for testing and for vndk prebuilt shared libraries.
+ No_crt_pad_segment *bool `android:"arch_variant"`
+
// deprecated and ignored because lld makes it unnecessary. See b/189475744.
Group_static_libs *bool `android:"arch_variant"`
@@ -253,6 +257,10 @@
return blp.No_libcrt == nil || !*blp.No_libcrt
}
+func (blp *BaseLinkerProperties) crtPadSegment() bool {
+ return blp.No_crt_pad_segment == nil || !*blp.No_crt_pad_segment
+}
+
func NewBaseLinker(sanitize *sanitize) *baseLinker {
return &baseLinker{sanitize: sanitize}
}
diff --git a/cc/testing.go b/cc/testing.go
index bac41e7..9c2900c 100644
--- a/cc/testing.go
+++ b/cc/testing.go
@@ -77,6 +77,7 @@
no_libcrt: true,
sdk_version: "minimum",
nocrt: true,
+ no_crt_pad_segment: true,
system_shared_libs: [],
stl: "none",
check_elf_files: false,
@@ -385,6 +386,11 @@
}
cc_object {
+ name: "crt_pad_segment",
+ defaults: ["crt_defaults"],
+ }
+
+ cc_object {
name: "crtbrand",
defaults: ["crt_defaults"],
srcs: ["crtbrand.c"],
diff --git a/cc/vendor_snapshot_test.go b/cc/vendor_snapshot_test.go
index 890a533..0a55431 100644
--- a/cc/vendor_snapshot_test.go
+++ b/cc/vendor_snapshot_test.go
@@ -341,6 +341,7 @@
vendor: true,
nocrt: true,
no_libcrt: true,
+ no_crt_pad_segment: true,
stl: "none",
system_shared_libs: [],
compile_multilib: "64",
@@ -458,6 +459,7 @@
vendor: true,
nocrt: true,
no_libcrt: true,
+ no_crt_pad_segment: true,
stl: "none",
system_shared_libs: [],
}
@@ -467,6 +469,7 @@
vendor: true,
nocrt: true,
no_libcrt: true,
+ no_crt_pad_segment: true,
stl: "none",
system_shared_libs: [],
shared_libs: ["libvndk", "libvendor_available", "libllndk"],
@@ -487,6 +490,7 @@
vendor: true,
nocrt: true,
no_libcrt: true,
+ no_crt_pad_segment: true,
stl: "none",
system_shared_libs: [],
static_libs: ["libvendor"],
@@ -501,6 +505,7 @@
vendor: true,
nocrt: true,
no_libcrt: true,
+ no_crt_pad_segment: true,
stl: "none",
system_shared_libs: [],
vndk: {
@@ -597,6 +602,7 @@
target_arch: "arm64",
compile_multilib: "both",
vendor: true,
+ no_crt_pad_segment: true,
shared_libs: [
"libvendor_without_snapshot",
"libvendor_available",
@@ -620,6 +626,7 @@
target_arch: "arm64",
compile_multilib: "both",
vendor: true,
+ no_crt_pad_segment: true,
overrides: ["libvendor"],
shared_libs: [
"libvendor_without_snapshot",
@@ -657,6 +664,7 @@
target_arch: "arm64",
compile_multilib: "32",
vendor: true,
+ no_crt_pad_segment: true,
arch: {
arm: {
src: "lib32.so",
@@ -683,6 +691,7 @@
target_arch: "arm64",
compile_multilib: "64",
vendor: true,
+ no_crt_pad_segment: true,
arch: {
arm64: {
src: "lib64.so",
@@ -722,6 +731,7 @@
target_arch: "arm64",
compile_multilib: "both",
vendor: true,
+ no_crt_pad_segment: true,
arch: {
arm64: {
src: "libvendor_available.so",
diff --git a/cc/vndk.go b/cc/vndk.go
index 0e0dba9..2b2ea64 100644
--- a/cc/vndk.go
+++ b/cc/vndk.go
@@ -377,22 +377,17 @@
return false
}
- // ignore prebuilt vndk modules that are newer than or equal to the platform vndk version
- platformVndkApiLevel := android.ApiLevelOrPanic(mctx, mctx.DeviceConfig().PlatformVndkVersion())
- if platformVndkApiLevel.LessThanOrEqualTo(android.ApiLevelOrPanic(mctx, p.Version())) {
- return false
+ platformVndkVersion := mctx.DeviceConfig().PlatformVndkVersion()
+ if platformVndkVersion != "" {
+ // ignore prebuilt vndk modules that are newer than or equal to the platform vndk version
+ platformVndkApiLevel := android.ApiLevelOrPanic(mctx, platformVndkVersion)
+ if platformVndkApiLevel.LessThanOrEqualTo(android.ApiLevelOrPanic(mctx, p.Version())) {
+ return false
+ }
}
}
if lib, ok := m.linker.(libraryInterface); ok {
- // VNDK APEX for VNDK-Lite devices will have VNDK-SP libraries from core variants
- if mctx.DeviceConfig().VndkVersion() == "" {
- // b/73296261: filter out libz.so because it is considered as LLNDK for VNDK-lite devices
- if mctx.ModuleName() == "libz" {
- return false
- }
- return m.ImageVariation().Variation == android.CoreVariation && lib.shared() && m.IsVndkSp() && !m.IsVndkExt()
- }
// VNDK APEX doesn't need stub variants
if lib.buildStubs() {
return false
diff --git a/cc/vndk_prebuilt.go b/cc/vndk_prebuilt.go
index eb1790f..43030b8 100644
--- a/cc/vndk_prebuilt.go
+++ b/cc/vndk_prebuilt.go
@@ -131,11 +131,14 @@
func (p *vndkPrebuiltLibraryDecorator) link(ctx ModuleContext,
flags Flags, deps PathDeps, objs Objects) android.Path {
- platformVndkApiLevel := android.ApiLevelOrPanic(ctx, ctx.DeviceConfig().PlatformVndkVersion())
- if platformVndkApiLevel.LessThanOrEqualTo(android.ApiLevelOrPanic(ctx, p.Version())) {
- // This prebuilt VNDK module is not required for the current build
- ctx.Module().HideFromMake()
- return nil
+ platformVndkVersion := ctx.DeviceConfig().PlatformVndkVersion()
+ if platformVndkVersion != "" {
+ platformVndkApiLevel := android.ApiLevelOrPanic(ctx, platformVndkVersion)
+ if platformVndkApiLevel.LessThanOrEqualTo(android.ApiLevelOrPanic(ctx, p.Version())) {
+ // This prebuilt VNDK module is not required for the current build
+ ctx.Module().HideFromMake()
+ return nil
+ }
}
if !p.MatchesWithDevice(ctx.DeviceConfig()) {
@@ -232,6 +235,7 @@
prebuilt.properties.Check_elf_files = BoolPtr(false)
prebuilt.baseLinker.Properties.No_libcrt = BoolPtr(true)
prebuilt.baseLinker.Properties.Nocrt = BoolPtr(true)
+ prebuilt.baseLinker.Properties.No_crt_pad_segment = BoolPtr(true)
// Prevent default system libs (libc, libm, and libdl) from being linked
if prebuilt.baseLinker.Properties.System_shared_libs == nil {
@@ -246,14 +250,6 @@
&prebuilt.properties,
)
- android.AddLoadHook(module, func(ctx android.LoadHookContext) {
- // empty BOARD_VNDK_VERSION implies that the device won't support
- // system only OTA. In this case, VNDK snapshots aren't needed.
- if ctx.DeviceConfig().VndkVersion() == "" {
- ctx.Module().Disable()
- }
- })
-
return module
}
diff --git a/dexpreopt/config.go b/dexpreopt/config.go
index 6163952..fe6317c 100644
--- a/dexpreopt/config.go
+++ b/dexpreopt/config.go
@@ -98,7 +98,9 @@
// measure, as it masks real errors and affects performance.
RelaxUsesLibraryCheck bool
- EnableUffdGc bool // preopt with the assumption that userfaultfd GC will be used on device.
+ // "true" to force preopt with CMC GC (a.k.a., UFFD GC); "false" to force preopt with CC GC;
+ // "default" to determine the GC type based on the kernel version file.
+ EnableUffdGc string
}
var allPlatformSystemServerJarsKey = android.NewOnceKey("allPlatformSystemServerJars")
@@ -154,6 +156,7 @@
Zip2zip android.Path
ManifestCheck android.Path
ConstructContext android.Path
+ UffdGcFlag android.WritablePath
}
type ModuleConfig struct {
@@ -537,6 +540,7 @@
Zip2zip: ctx.Config().HostToolPath(ctx, "zip2zip"),
ManifestCheck: ctx.Config().HostToolPath(ctx, "manifest_check"),
ConstructContext: ctx.Config().HostToolPath(ctx, "construct_context"),
+ UffdGcFlag: getUffdGcFlagPath(ctx),
}
}
@@ -588,6 +592,7 @@
Zip2zip string
ManifestCheck string
ConstructContext string
+ UffdGcFlag string
}
// ParseGlobalSoongConfig parses the given data assumed to be read from the
@@ -609,6 +614,7 @@
Zip2zip: constructPath(ctx, jc.Zip2zip),
ManifestCheck: constructPath(ctx, jc.ManifestCheck),
ConstructContext: constructPath(ctx, jc.ConstructContext),
+ UffdGcFlag: constructWritablePath(ctx, jc.UffdGcFlag),
}
return config, nil
@@ -633,12 +639,15 @@
}
func (s *globalSoongConfigSingleton) GenerateBuildActions(ctx android.SingletonContext) {
- checkBootJarsConfigConsistency(ctx, GetGlobalConfig(ctx), ctx.Config())
+ global := GetGlobalConfig(ctx)
+ checkBootJarsConfigConsistency(ctx, global, ctx.Config())
- if GetGlobalConfig(ctx).DisablePreopt {
+ if global.DisablePreopt {
return
}
+ buildUffdGcFlag(ctx, global)
+
config := GetCachedGlobalSoongConfig(ctx)
if config == nil {
// No module has enabled dexpreopting, so we assume there will be no calls
@@ -654,6 +663,7 @@
Zip2zip: config.Zip2zip.String(),
ManifestCheck: config.ManifestCheck.String(),
ConstructContext: config.ConstructContext.String(),
+ UffdGcFlag: config.UffdGcFlag.String(),
}
data, err := json.Marshal(jc)
@@ -684,9 +694,32 @@
config.Zip2zip.String(),
config.ManifestCheck.String(),
config.ConstructContext.String(),
+ config.UffdGcFlag.String(),
}, " "))
}
+func buildUffdGcFlag(ctx android.BuilderContext, global *GlobalConfig) {
+ uffdGcFlag := getUffdGcFlagPath(ctx)
+
+ if global.EnableUffdGc == "true" {
+ android.WriteFileRuleVerbatim(ctx, uffdGcFlag, "--runtime-arg -Xgc:CMC")
+ } else if global.EnableUffdGc == "false" {
+ android.WriteFileRuleVerbatim(ctx, uffdGcFlag, "")
+ } else if global.EnableUffdGc == "default" {
+ // Generated by `build/make/core/Makefile`.
+ kernelVersionFile := android.PathForOutput(ctx, "dexpreopt/kernel_version_for_uffd_gc.txt")
+ // Determine the UFFD GC flag by the kernel version file.
+ rule := android.NewRuleBuilder(pctx, ctx)
+ rule.Command().
+ Tool(ctx.Config().HostToolPath(ctx, "construct_uffd_gc_flag")).
+ Input(kernelVersionFile).
+ Output(uffdGcFlag)
+ rule.Restat().Build("dexpreopt_uffd_gc_flag", "dexpreopt_uffd_gc_flag")
+ } else {
+ panic(fmt.Sprintf("Unknown value of PRODUCT_ENABLE_UFFD_GC: %s", global.EnableUffdGc))
+ }
+}
+
func GlobalConfigForTests(ctx android.PathContext) *GlobalConfig {
return &GlobalConfig{
DisablePreopt: false,
@@ -731,7 +764,7 @@
}
}
-func globalSoongConfigForTests() *GlobalSoongConfig {
+func globalSoongConfigForTests(ctx android.BuilderContext) *GlobalSoongConfig {
return &GlobalSoongConfig{
Profman: android.PathForTesting("profman"),
Dex2oat: android.PathForTesting("dex2oat"),
@@ -740,5 +773,19 @@
Zip2zip: android.PathForTesting("zip2zip"),
ManifestCheck: android.PathForTesting("manifest_check"),
ConstructContext: android.PathForTesting("construct_context"),
+ UffdGcFlag: android.PathForOutput(ctx, "dexpreopt_test", "uffd_gc_flag.txt"),
}
}
+
+func GetDexpreoptDirName(ctx android.PathContext) string {
+ prefix := "dexpreopt_"
+ targets := ctx.Config().Targets[android.Android]
+ if len(targets) > 0 {
+ return prefix + targets[0].Arch.ArchType.String()
+ }
+ return prefix + "unknown_target"
+}
+
+func getUffdGcFlagPath(ctx android.PathContext) android.WritablePath {
+ return android.PathForOutput(ctx, "dexpreopt/uffd_gc_flag.txt")
+}
diff --git a/dexpreopt/dexpreopt.go b/dexpreopt/dexpreopt.go
index 94707ba..04bc61d 100644
--- a/dexpreopt/dexpreopt.go
+++ b/dexpreopt/dexpreopt.go
@@ -390,7 +390,8 @@
Flag("--generate-build-id").
Flag("--abort-on-hard-verifier-error").
Flag("--force-determinism").
- FlagWithArg("--no-inline-from=", "core-oj.jar")
+ FlagWithArg("--no-inline-from=", "core-oj.jar").
+ Text("$(cat").Input(globalSoong.UffdGcFlag).Text(")")
var preoptFlags []string
if len(module.PreoptFlags) > 0 {
@@ -506,10 +507,6 @@
cmd.FlagWithInput("--profile-file=", profile)
}
- if global.EnableUffdGc {
- cmd.Flag("--runtime-arg").Flag("-Xgc:CMC")
- }
-
rule.Install(odexPath, odexInstallPath)
rule.Install(vdexPath, vdexInstallPath)
}
diff --git a/dexpreopt/dexpreopt_test.go b/dexpreopt/dexpreopt_test.go
index 230fbb4..7071f3e 100644
--- a/dexpreopt/dexpreopt_test.go
+++ b/dexpreopt/dexpreopt_test.go
@@ -96,7 +96,7 @@
func TestDexPreopt(t *testing.T) {
config := android.TestConfig("out", nil, "", nil)
ctx := android.BuilderContextForTesting(config)
- globalSoong := globalSoongConfigForTests()
+ globalSoong := globalSoongConfigForTests(ctx)
global := GlobalConfigForTests(ctx)
module := testSystemModuleConfig(ctx, "test")
productPackages := android.PathForTesting("product_packages.txt")
@@ -114,12 +114,15 @@
if rule.Installs().String() != wantInstalls.String() {
t.Errorf("\nwant installs:\n %v\ngot:\n %v", wantInstalls, rule.Installs())
}
+
+ android.AssertStringListContains(t, "", rule.Inputs().RelativeToTop().Strings(),
+ "out/soong/dexpreopt_test/uffd_gc_flag.txt")
}
func TestDexPreoptSystemOther(t *testing.T) {
config := android.TestConfig("out", nil, "", nil)
ctx := android.BuilderContextForTesting(config)
- globalSoong := globalSoongConfigForTests()
+ globalSoong := globalSoongConfigForTests(ctx)
global := GlobalConfigForTests(ctx)
systemModule := testSystemModuleConfig(ctx, "Stest")
systemProductModule := testSystemProductModuleConfig(ctx, "SPtest")
@@ -180,7 +183,7 @@
func TestDexPreoptApexSystemServerJars(t *testing.T) {
config := android.TestConfig("out", nil, "", nil)
ctx := android.BuilderContextForTesting(config)
- globalSoong := globalSoongConfigForTests()
+ globalSoong := globalSoongConfigForTests(ctx)
global := GlobalConfigForTests(ctx)
module := testApexModuleConfig(ctx, "service-A", "com.android.apex1")
productPackages := android.PathForTesting("product_packages.txt")
@@ -204,7 +207,7 @@
func TestDexPreoptStandaloneSystemServerJars(t *testing.T) {
config := android.TestConfig("out", nil, "", nil)
ctx := android.BuilderContextForTesting(config)
- globalSoong := globalSoongConfigForTests()
+ globalSoong := globalSoongConfigForTests(ctx)
global := GlobalConfigForTests(ctx)
module := testPlatformSystemServerModuleConfig(ctx, "service-A")
productPackages := android.PathForTesting("product_packages.txt")
@@ -228,7 +231,7 @@
func TestDexPreoptSystemExtSystemServerJars(t *testing.T) {
config := android.TestConfig("out", nil, "", nil)
ctx := android.BuilderContextForTesting(config)
- globalSoong := globalSoongConfigForTests()
+ globalSoong := globalSoongConfigForTests(ctx)
global := GlobalConfigForTests(ctx)
module := testSystemExtSystemServerModuleConfig(ctx, "service-A")
productPackages := android.PathForTesting("product_packages.txt")
@@ -252,7 +255,7 @@
func TestDexPreoptApexStandaloneSystemServerJars(t *testing.T) {
config := android.TestConfig("out", nil, "", nil)
ctx := android.BuilderContextForTesting(config)
- globalSoong := globalSoongConfigForTests()
+ globalSoong := globalSoongConfigForTests(ctx)
global := GlobalConfigForTests(ctx)
module := testApexModuleConfig(ctx, "service-A", "com.android.apex1")
productPackages := android.PathForTesting("product_packages.txt")
@@ -276,7 +279,7 @@
func TestDexPreoptProfile(t *testing.T) {
config := android.TestConfig("out", nil, "", nil)
ctx := android.BuilderContextForTesting(config)
- globalSoong := globalSoongConfigForTests()
+ globalSoong := globalSoongConfigForTests(ctx)
global := GlobalConfigForTests(ctx)
module := testSystemModuleConfig(ctx, "test")
productPackages := android.PathForTesting("product_packages.txt")
@@ -316,3 +319,55 @@
after := fmt.Sprintf("%v", parsed)
android.AssertStringEquals(t, "The result must be the same as the original after marshalling and unmarshalling it.", before, after)
}
+
+func TestUffdGcFlagForce(t *testing.T) {
+ for _, enableUffdGc := range []string{"true", "false"} {
+ t.Run(enableUffdGc, func(t *testing.T) {
+ preparers := android.GroupFixturePreparers(
+ PrepareForTestWithFakeDex2oatd,
+ PrepareForTestWithDexpreoptConfig,
+ FixtureSetEnableUffdGc(enableUffdGc),
+ )
+
+ result := preparers.RunTest(t)
+ ctx := result.TestContext
+
+ ctx.SingletonForTests("dexpreopt-soong-config").Output("out/soong/dexpreopt/uffd_gc_flag.txt")
+ })
+ }
+}
+
+func TestUffdGcFlagDefault(t *testing.T) {
+ preparers := android.GroupFixturePreparers(
+ PrepareForTestWithFakeDex2oatd,
+ PrepareForTestWithDexpreoptConfig,
+ FixtureSetEnableUffdGc("default"),
+ )
+
+ result := preparers.RunTest(t)
+ ctx := result.TestContext
+ config := ctx.Config()
+
+ rule := ctx.SingletonForTests("dexpreopt-soong-config").Rule("dexpreopt_uffd_gc_flag")
+
+ android.AssertStringDoesContain(t, "", rule.RuleParams.Command, "construct_uffd_gc_flag")
+ android.AssertStringPathsRelativeToTopEquals(t, "", config, []string{
+ "out/soong/dexpreopt/uffd_gc_flag.txt",
+ }, rule.AllOutputs())
+ android.AssertPathsRelativeToTopEquals(t, "", []string{
+ "out/soong/dexpreopt/kernel_version_for_uffd_gc.txt",
+ }, rule.Implicits)
+}
+
+func TestUffdGcFlagBogus(t *testing.T) {
+ preparers := android.GroupFixturePreparers(
+ PrepareForTestWithFakeDex2oatd,
+ PrepareForTestWithDexpreoptConfig,
+ FixtureSetEnableUffdGc("bogus"),
+ )
+
+ preparers.
+ ExtendWithErrorHandler(android.FixtureExpectsAtLeastOneErrorMatchingPattern(
+ "Unknown value of PRODUCT_ENABLE_UFFD_GC: bogus")).
+ RunTest(t)
+}
diff --git a/dexpreopt/testing.go b/dexpreopt/testing.go
index 147a562..b1fbef5 100644
--- a/dexpreopt/testing.go
+++ b/dexpreopt/testing.go
@@ -88,6 +88,15 @@
FixtureModifyGlobalConfig(func(android.PathContext, *GlobalConfig) {}),
)
+var PrepareForTestWithDexpreoptConfig = android.GroupFixturePreparers(
+ android.PrepareForTestWithAndroidBuildComponents,
+ android.FixtureModifyContext(func(ctx *android.TestContext) {
+ ctx.RegisterParallelSingletonType("dexpreopt-soong-config", func() android.Singleton {
+ return &globalSoongConfigSingleton{}
+ })
+ }),
+)
+
// FixtureModifyGlobalConfig enables dexpreopt (unless modified by the mutator) and modifies the
// configuration.
func FixtureModifyGlobalConfig(configModifier func(ctx android.PathContext, dexpreoptConfig *GlobalConfig)) android.FixturePreparer {
@@ -195,3 +204,10 @@
dexpreoptConfig.DisablePreopt = disable
})
}
+
+// FixtureSetEnableUffdGc sets the EnableUffdGc property in the global config.
+func FixtureSetEnableUffdGc(value string) android.FixturePreparer {
+ return FixtureModifyGlobalConfig(func(_ android.PathContext, dexpreoptConfig *GlobalConfig) {
+ dexpreoptConfig.EnableUffdGc = value
+ })
+}
diff --git a/java/dexpreopt_bootjars.go b/java/dexpreopt_bootjars.go
index ec8b4c8..01f60d4 100644
--- a/java/dexpreopt_bootjars.go
+++ b/java/dexpreopt_bootjars.go
@@ -617,7 +617,8 @@
// GenerateSingletonBuildActions generates build rules for the dexpreopt config for Make.
func (d *dexpreoptBootJars) GenerateSingletonBuildActions(ctx android.SingletonContext) {
- d.dexpreoptConfigForMake = android.PathForOutput(ctx, getDexpreoptDirName(ctx), "dexpreopt.config")
+ d.dexpreoptConfigForMake =
+ android.PathForOutput(ctx, dexpreopt.GetDexpreoptDirName(ctx), "dexpreopt.config")
writeGlobalConfigForMake(ctx, d.dexpreoptConfigForMake)
}
@@ -1066,8 +1067,8 @@
cmd.FlagWithArg("--instruction-set-features=", global.InstructionSetFeatures[arch])
}
- if global.EnableUffdGc && image.target.Os == android.Android {
- cmd.Flag("--runtime-arg").Flag("-Xgc:CMC")
+ if image.target.Os == android.Android {
+ cmd.Text("$(cat").Input(globalSoong.UffdGcFlag).Text(")")
}
if global.BootFlags != "" {
@@ -1235,7 +1236,7 @@
func dumpOatRules(ctx android.ModuleContext, image *bootImageConfig) {
var allPhonies android.Paths
name := image.name
- global := dexpreopt.GetGlobalConfig(ctx)
+ globalSoong := dexpreopt.GetGlobalSoongConfig(ctx)
for _, image := range image.variants {
arch := image.target.Arch.ArchType
suffix := arch.String()
@@ -1247,6 +1248,7 @@
output := android.PathForOutput(ctx, name+"."+suffix+".oatdump.txt")
rule := android.NewRuleBuilder(pctx, ctx)
imageLocationsOnHost, _ := image.imageLocations()
+
cmd := rule.Command().
BuiltTool("oatdump").
FlagWithInputList("--runtime-arg -Xbootclasspath:", image.dexPathsDeps.Paths(), ":").
@@ -1254,8 +1256,8 @@
FlagWithArg("--image=", strings.Join(imageLocationsOnHost, ":")).Implicits(image.imagesDeps.Paths()).
FlagWithOutput("--output=", output).
FlagWithArg("--instruction-set=", arch.String())
- if global.EnableUffdGc && image.target.Os == android.Android {
- cmd.Flag("--runtime-arg").Flag("-Xgc:CMC")
+ if image.target.Os == android.Android {
+ cmd.Text("$(cat").Input(globalSoong.UffdGcFlag).Text(")")
}
rule.Build("dump-oat-"+name+"-"+suffix, "dump oat "+name+" "+arch.String())
diff --git a/java/dexpreopt_config.go b/java/dexpreopt_config.go
index 254b2c1..dc0973c 100644
--- a/java/dexpreopt_config.go
+++ b/java/dexpreopt_config.go
@@ -115,7 +115,7 @@
func genBootImageConfigs(ctx android.PathContext) map[string]*bootImageConfig {
return ctx.Config().Once(bootImageConfigKey, func() interface{} {
targets := dexpreoptTargets(ctx)
- deviceDir := android.PathForOutput(ctx, getDexpreoptDirName(ctx))
+ deviceDir := android.PathForOutput(ctx, dexpreopt.GetDexpreoptDirName(ctx))
configs := genBootImageConfigRaw(ctx)
@@ -234,12 +234,3 @@
func dexpreoptConfigMakevars(ctx android.MakeVarsContext) {
ctx.Strict("DEXPREOPT_BOOT_JARS_MODULES", strings.Join(defaultBootImageConfig(ctx).modules.CopyOfApexJarPairs(), ":"))
}
-
-func getDexpreoptDirName(ctx android.PathContext) string {
- prefix := "dexpreopt_"
- targets := ctx.Config().Targets[android.Android]
- if len(targets) > 0 {
- return prefix + targets[0].Arch.ArchType.String()
- }
- return prefix + "unknown_target"
-}
diff --git a/java/droidstubs.go b/java/droidstubs.go
index 6ef2afe..dc3a0ec 100644
--- a/java/droidstubs.go
+++ b/java/droidstubs.go
@@ -537,11 +537,17 @@
var apiVersions android.Path
if proptools.Bool(d.properties.Api_levels_annotations_enabled) {
d.apiLevelsGenerationFlags(ctx, cmd, stubsType, apiVersionsXml)
- apiVersions = d.everythingArtifacts.apiVersionsXml
+ apiVersions = apiVersionsXml
} else {
ctx.VisitDirectDepsWithTag(metalavaAPILevelsModuleTag, func(m android.Module) {
if s, ok := m.(*Droidstubs); ok {
- apiVersions = s.everythingArtifacts.apiVersionsXml
+ if stubsType == Everything {
+ apiVersions = s.everythingArtifacts.apiVersionsXml
+ } else if stubsType == Exportable {
+ apiVersions = s.exportableArtifacts.apiVersionsXml
+ } else {
+ ctx.ModuleErrorf("%s stubs type does not generate api-versions.xml file", stubsType.String())
+ }
} else {
ctx.PropertyErrorf("api_levels_module",
"module %q is not a droidstubs module", ctx.OtherModuleName(m))
diff --git a/python/scripts/precompile_python.py b/python/scripts/precompile_python.py
index e12e7d2..80e7c76 100644
--- a/python/scripts/precompile_python.py
+++ b/python/scripts/precompile_python.py
@@ -16,6 +16,7 @@
import argparse
import py_compile
import os
+import sys
import shutil
import tempfile
import zipfile
@@ -23,22 +24,31 @@
# This file needs to support both python 2 and 3.
-def process_one_file(name, inf, outzip):
- if not name.endswith('.py'):
- outzip.writestr(name, inf.read())
+def process_one_file(info, infile, outzip):
+ if not info.filename.endswith('.py'):
+ outzip.writestr(info, infile.read())
return
# Unfortunately py_compile requires the input/output files to be written
# out to disk.
with tempfile.NamedTemporaryFile(prefix="Soong_precompile_", delete=False) as tmp:
- shutil.copyfileobj(inf, tmp)
+ shutil.copyfileobj(infile, tmp)
in_name = tmp.name
with tempfile.NamedTemporaryFile(prefix="Soong_precompile_", delete=False) as tmp:
out_name = tmp.name
try:
- py_compile.compile(in_name, out_name, name, doraise=True)
+ # Ensure deterministic pyc by using the hash rather than timestamp.
+ # This is required to improve caching in accelerated builds.
+ # Only works on Python 3.7+ (see https://docs.python.org/3/library/py_compile.html#py_compile.PycInvalidationMode)
+ # which should cover most updated branches and developer machines.
+ if sys.version_info >= (3, 7):
+ py_compile.compile(in_name, out_name, info.filename, doraise=True, invalidation_mode=py_compile.PycInvalidationMode.CHECKED_HASH)
+ else:
+ py_compile.compile(in_name, out_name, info.filename, doraise=True)
with open(out_name, 'rb') as f:
- outzip.writestr(name + 'c', f.read())
+ info.filename = info.filename + 'c'
+ # Use ZipInfo rather than str to reuse timestamps for deterministic zip files.
+ outzip.writestr(info, f.read())
finally:
os.remove(in_name)
os.remove(out_name)
@@ -52,9 +62,9 @@
with open(args.dst_zip, 'wb') as outf, open(args.src_zip, 'rb') as inf:
with zipfile.ZipFile(outf, mode='w') as outzip, zipfile.ZipFile(inf, mode='r') as inzip:
- for name in inzip.namelist():
- with inzip.open(name, mode='r') as inzipf:
- process_one_file(name, inzipf, outzip)
+ for info in inzip.infolist():
+ with inzip.open(info.filename, mode='r') as inzipf:
+ process_one_file(info, inzipf, outzip)
if __name__ == "__main__":
diff --git a/rust/androidmk.go b/rust/androidmk.go
index 17fd2d8..e0cb3ce 100644
--- a/rust/androidmk.go
+++ b/rust/androidmk.go
@@ -63,8 +63,10 @@
entries.AddStrings("LOCAL_SHARED_LIBRARIES", mod.transitiveAndroidMkSharedLibs.ToList()...)
entries.AddStrings("LOCAL_STATIC_LIBRARIES", mod.Properties.AndroidMkStaticLibs...)
entries.AddStrings("LOCAL_SOONG_LINK_TYPE", mod.makeLinkType)
- if mod.UseVndk() {
- entries.SetBool("LOCAL_USE_VNDK", true)
+ if mod.InVendor() {
+ entries.SetBool("LOCAL_IN_VENDOR", true)
+ } else if mod.InProduct() {
+ entries.SetBool("LOCAL_IN_PRODUCT", true)
}
android.SetAconfigFileMkEntries(mod.AndroidModuleBase(), entries, mod.mergedAconfigFiles)
},
diff --git a/rust/vendor_snapshot_test.go b/rust/vendor_snapshot_test.go
index 4f45799..7ebe66b 100644
--- a/rust/vendor_snapshot_test.go
+++ b/rust/vendor_snapshot_test.go
@@ -553,6 +553,7 @@
vendor: true,
nocrt: true,
no_libcrt: true,
+ no_crt_pad_segment: true,
stl: "none",
system_shared_libs: [],
}
@@ -857,6 +858,7 @@
target_arch: "arm64",
compile_multilib: "32",
vendor: true,
+ no_crt_pad_segment: true,
arch: {
arm: {
src: "lib32.so",
@@ -870,6 +872,7 @@
target_arch: "arm64",
compile_multilib: "64",
vendor: true,
+ no_crt_pad_segment: true,
arch: {
arm64: {
src: "lib64.so",
@@ -882,6 +885,7 @@
target_arch: "arm64",
compile_multilib: "64",
vendor: true,
+ no_crt_pad_segment: true,
arch: {
arm64: {
src: "liblog.so",
@@ -913,6 +917,7 @@
target_arch: "arm64",
compile_multilib: "both",
vendor: true,
+ no_crt_pad_segment: true,
arch: {
arm64: {
src: "libvendor_available.so",
diff --git a/scripts/Android.bp b/scripts/Android.bp
index 7baaadb..e2fd59f 100644
--- a/scripts/Android.bp
+++ b/scripts/Android.bp
@@ -143,6 +143,39 @@
}
python_library_host {
+ name: "uffd_gc_utils",
+ srcs: [
+ "uffd_gc_utils.py",
+ ],
+ visibility: [
+ "//build/make/tools:__subpackages__",
+ ],
+}
+
+python_test_host {
+ name: "uffd_gc_utils_test",
+ main: "uffd_gc_utils_test.py",
+ srcs: [
+ "uffd_gc_utils_test.py",
+ ],
+ libs: [
+ "uffd_gc_utils",
+ ],
+ test_suites: ["general-tests"],
+}
+
+python_binary_host {
+ name: "construct_uffd_gc_flag",
+ main: "construct_uffd_gc_flag.py",
+ srcs: [
+ "construct_uffd_gc_flag.py",
+ ],
+ libs: [
+ "uffd_gc_utils",
+ ],
+}
+
+python_library_host {
name: "ninja_rsp",
srcs: ["ninja_rsp.py"],
}
diff --git a/scripts/construct_uffd_gc_flag.py b/scripts/construct_uffd_gc_flag.py
new file mode 100644
index 0000000..f437961
--- /dev/null
+++ b/scripts/construct_uffd_gc_flag.py
@@ -0,0 +1,46 @@
+#!/usr/bin/env python
+#
+# Copyright (C) 2024 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+"""A tool for constructing UFFD GC flag."""
+
+import argparse
+import os
+
+from uffd_gc_utils import should_enable_uffd_gc
+
+
+def parse_args():
+ parser = argparse.ArgumentParser()
+ parser.add_argument('kernel_version_file')
+ parser.add_argument('output')
+ return parser.parse_args()
+
+def main():
+ args = parse_args()
+ enable_uffd_gc = should_enable_uffd_gc(args.kernel_version_file)
+ flag = '--runtime-arg -Xgc:CMC' if enable_uffd_gc else ''
+ # Prevent the file's mtime from being changed if the contents don't change.
+ # This avoids unnecessary dexpreopt reruns.
+ if os.path.isfile(args.output):
+ with open(args.output, 'r') as f:
+ if f.read() == flag:
+ return
+ with open(args.output, 'w') as f:
+ f.write(flag)
+
+
+if __name__ == '__main__':
+ main()
diff --git a/scripts/uffd_gc_utils.py b/scripts/uffd_gc_utils.py
new file mode 100644
index 0000000..2d35494
--- /dev/null
+++ b/scripts/uffd_gc_utils.py
@@ -0,0 +1,68 @@
+#!/usr/bin/env python
+#
+# Copyright (C) 2024 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+"""Utils to determine whether to enable UFFD GC."""
+
+import re
+import sys
+
+
+def should_enable_uffd_gc(kernel_version_file):
+ with open(kernel_version_file, 'r') as f:
+ kernel_version = f.read().strip()
+ return should_enable_uffd_gc_impl(kernel_version)
+
+def should_enable_uffd_gc_impl(kernel_version):
+ # See https://source.android.com/docs/core/architecture/kernel/gki-versioning#determine-release
+ p = r"^(?P<w>\d+)[.](?P<x>\d+)[.](?P<y>\d+)(-android(?P<z>\d+)-(?P<k>\d+).*$)?"
+ m = re.match(p, kernel_version)
+ if m is not None:
+ if m.group('z') is not None:
+ android_release = int(m.group('z'))
+ # No need to check w, x, y because all Android 12 kernels have backports.
+ return android_release >= 12
+ else:
+ # Old kernel or non-GKI kernel.
+ version = int(m.group('w'))
+ patch_level = int(m.group('x'))
+ if version < 5:
+ # Old kernel.
+ return False
+ elif (version == 5 and patch_level >= 7) or version >= 6:
+ # New non-GKI kernel. 5.7 supports MREMAP_DONTUNMAP without the need for
+ # backports.
+ return True
+ else:
+ # Non-GKI kernel between 5 and 5.6. It may have backports.
+ raise exit_with_error(kernel_version)
+ elif kernel_version == '<unknown-kernel>':
+ # The kernel information isn't available to the build system, probably
+ # because PRODUCT_OTA_ENFORCE_VINTF_KERNEL_REQUIREMENTS is set to false. We
+ # assume that the kernel supports UFFD GC because it is the case for most of
+ # the products today and it is the future.
+ return True
+ else:
+ # Unrecognizable non-GKI kernel.
+ raise exit_with_error(kernel_version)
+
+def exit_with_error(kernel_version):
+ sys.exit(f"""
+Unable to determine UFFD GC flag for kernel version "{kernel_version}".
+You can fix this by explicitly setting PRODUCT_ENABLE_UFFD_GC to "true" or
+"false" based on the kernel version.
+1. Set PRODUCT_ENABLE_UFFD_GC to "true" if the kernel supports userfaultfd(2)
+ and MREMAP_DONTUNMAP.
+2. Set PRODUCT_ENABLE_UFFD_GC to "false" otherwise.""")
diff --git a/scripts/uffd_gc_utils_test.py b/scripts/uffd_gc_utils_test.py
new file mode 100644
index 0000000..c86ab4b
--- /dev/null
+++ b/scripts/uffd_gc_utils_test.py
@@ -0,0 +1,61 @@
+#!/usr/bin/env python
+#
+# Copyright (C) 2024 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+"""Unit tests for uffd_gc_utils.py."""
+
+import unittest
+
+from uffd_gc_utils import should_enable_uffd_gc_impl
+
+
+class UffdGcUtilsTest(unittest.TestCase):
+ def test_should_enable_uffd_gc_impl(self):
+ # GKI kernels in new format.
+ self.assertTrue(should_enable_uffd_gc_impl(
+ "6.1.25-android14-11-g34fde9ec08a3-ab10675345"))
+ self.assertTrue(should_enable_uffd_gc_impl(
+ "5.4.42-android12-0-something"))
+ self.assertFalse(should_enable_uffd_gc_impl(
+ "5.4.42-android11-0-something"))
+ # GKI kernels in old format.
+ self.assertFalse(should_enable_uffd_gc_impl(
+ "4.19.282-g4b749a433956-ab10893502"))
+ # Non GKI kernels.
+ self.assertTrue(should_enable_uffd_gc_impl(
+ "6.1.25-foo"))
+ self.assertTrue(should_enable_uffd_gc_impl(
+ "6.1.25"))
+ self.assertTrue(should_enable_uffd_gc_impl(
+ "5.10.19-foo"))
+ self.assertTrue(should_enable_uffd_gc_impl(
+ "5.10.19"))
+ with self.assertRaises(SystemExit):
+ should_enable_uffd_gc_impl("5.4.42-foo")
+ with self.assertRaises(SystemExit):
+ should_enable_uffd_gc_impl("5.4.42")
+ self.assertFalse(should_enable_uffd_gc_impl(
+ "4.19.282-foo"))
+ self.assertFalse(should_enable_uffd_gc_impl(
+ "4.19.282"))
+ with self.assertRaises(SystemExit):
+ should_enable_uffd_gc_impl("foo")
+ # No kernel.
+ self.assertTrue(should_enable_uffd_gc_impl(
+ "<unknown-kernel>"))
+
+
+if __name__ == '__main__':
+ unittest.main(verbosity=2)