Create public stub for platform's sysprop_library
Java modules using SystemAPI can now link against platform owned
sysprop_library with public stub. This allows modules to use platform's
public sysprops (which should be regarded as an API) without any hidden
API usages, if using dynamic linking and boot class path.
This doesn't affect any vendor or odm owned sysprop_library.
Bug: 141246285
Bug: 145167888
Test: m
Change-Id: I99824fb24a75cc8282211c2ad6c6296ae9fca393
diff --git a/Android.bp b/Android.bp
index d469f41..7576102 100644
--- a/Android.bp
+++ b/Android.bp
@@ -298,6 +298,7 @@
"java/sdk.go",
"java/sdk_library.go",
"java/support_libraries.go",
+ "java/sysprop.go",
"java/system_modules.go",
"java/testing.go",
"java/tradefed.go",
diff --git a/cc/cc.go b/cc/cc.go
index 512fe8e..5083ca3 100644
--- a/cc/cc.go
+++ b/cc/cc.go
@@ -42,7 +42,7 @@
ctx.BottomUp("test_per_src", TestPerSrcMutator).Parallel()
ctx.BottomUp("version", VersionMutator).Parallel()
ctx.BottomUp("begin", BeginMutator).Parallel()
- ctx.BottomUp("sysprop", SyspropMutator).Parallel()
+ ctx.BottomUp("sysprop_cc", SyspropMutator).Parallel()
})
android.PostDepsMutators(func(ctx android.RegisterMutatorsContext) {
diff --git a/java/java.go b/java/java.go
index d8db5f8..2d97b7f 100644
--- a/java/java.go
+++ b/java/java.go
@@ -585,8 +585,36 @@
}
}
- ctx.AddVariationDependencies(nil, libTag, j.properties.Libs...)
- ctx.AddVariationDependencies(nil, staticLibTag, j.properties.Static_libs...)
+ syspropPublicStubs := syspropPublicStubs(ctx.Config())
+
+ // rewriteSyspropLibs validates if a java module can link against platform's sysprop_library,
+ // and redirects dependency to public stub depending on the link type.
+ rewriteSyspropLibs := func(libs []string, prop string) []string {
+ // make a copy
+ ret := android.CopyOf(libs)
+
+ for idx, lib := range libs {
+ stub, ok := syspropPublicStubs[lib]
+
+ if !ok {
+ continue
+ }
+
+ linkType, _ := j.getLinkType(ctx.ModuleName())
+ if linkType == javaSystem {
+ ret[idx] = stub
+ } else if linkType != javaPlatform {
+ ctx.PropertyErrorf("sdk_version",
+ "can't link against sysprop_library %q from a module using public or core API",
+ lib)
+ }
+ }
+
+ return ret
+ }
+
+ ctx.AddVariationDependencies(nil, libTag, rewriteSyspropLibs(j.properties.Libs, "libs")...)
+ ctx.AddVariationDependencies(nil, staticLibTag, rewriteSyspropLibs(j.properties.Static_libs, "static_libs")...)
ctx.AddFarVariationDependencies(ctx.Config().BuildOSCommonTarget.Variations(), pluginTag, j.properties.Plugins...)
ctx.AddFarVariationDependencies(ctx.Config().BuildOSCommonTarget.Variations(), exportedPluginTag, j.properties.Exported_plugins...)
diff --git a/java/sysprop.go b/java/sysprop.go
new file mode 100644
index 0000000..1a70499
--- /dev/null
+++ b/java/sysprop.go
@@ -0,0 +1,60 @@
+// Copyright (C) 2019 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.
+
+package java
+
+import (
+ "sync"
+
+ "android/soong/android"
+)
+
+type syspropLibraryInterface interface {
+ BaseModuleName() string
+ Owner() string
+ HasPublicStub() bool
+ JavaPublicStubName() string
+}
+
+var (
+ syspropPublicStubsKey = android.NewOnceKey("syspropPublicStubsJava")
+ syspropPublicStubsLock sync.Mutex
+)
+
+func init() {
+ android.PreDepsMutators(func(ctx android.RegisterMutatorsContext) {
+ ctx.BottomUp("sysprop_java", SyspropMutator).Parallel()
+ })
+}
+
+func syspropPublicStubs(config android.Config) map[string]string {
+ return config.Once(syspropPublicStubsKey, func() interface{} {
+ return make(map[string]string)
+ }).(map[string]string)
+}
+
+// gather list of sysprop libraries owned by platform.
+func SyspropMutator(mctx android.BottomUpMutatorContext) {
+ if m, ok := mctx.Module().(syspropLibraryInterface); ok {
+ if m.Owner() != "Platform" || !m.HasPublicStub() {
+ return
+ }
+
+ syspropPublicStubs := syspropPublicStubs(mctx.Config())
+ syspropPublicStubsLock.Lock()
+ defer syspropPublicStubsLock.Unlock()
+
+ syspropPublicStubs[m.BaseModuleName()] = m.JavaPublicStubName()
+ }
+}
diff --git a/sysprop/sysprop_library.go b/sysprop/sysprop_library.go
index 1fc94db..ce404f8 100644
--- a/sysprop/sysprop_library.go
+++ b/sysprop/sysprop_library.go
@@ -35,6 +35,7 @@
type syspropGenProperties struct {
Srcs []string `android:"path"`
Scope string
+ Name *string
}
type syspropJavaGenRule struct {
@@ -142,6 +143,9 @@
// list of .sysprop files which defines the properties.
Srcs []string `android:"path"`
+
+ // Whether public stub exists or not.
+ Public_stub *bool `blueprint:"mutated"`
}
var (
@@ -157,18 +161,37 @@
return m.BaseModuleName() + "_sysprop_library"
}
+func (m *syspropLibrary) Owner() string {
+ return m.properties.Property_owner
+}
+
func (m *syspropLibrary) CcModuleName() string {
return "lib" + m.BaseModuleName()
}
+func (m *syspropLibrary) JavaPublicStubName() string {
+ if proptools.Bool(m.properties.Public_stub) {
+ return m.BaseModuleName() + "_public"
+ }
+ return ""
+}
+
func (m *syspropLibrary) javaGenModuleName() string {
return m.BaseModuleName() + "_java_gen"
}
+func (m *syspropLibrary) javaGenPublicStubName() string {
+ return m.BaseModuleName() + "_java_gen_public"
+}
+
func (m *syspropLibrary) BaseModuleName() string {
return m.ModuleBase.Name()
}
+func (m *syspropLibrary) HasPublicStub() bool {
+ return proptools.Bool(m.properties.Public_stub)
+}
+
func (m *syspropLibrary) GenerateAndroidBuildActions(ctx android.ModuleContext) {
baseModuleName := m.BaseModuleName()
@@ -274,6 +297,36 @@
return m
}
+type ccLibraryProperties struct {
+ Name *string
+ Srcs []string
+ Soc_specific *bool
+ Device_specific *bool
+ Product_specific *bool
+ Sysprop struct {
+ Platform *bool
+ }
+ Header_libs []string
+ Shared_libs []string
+ Required []string
+ Recovery *bool
+ Recovery_available *bool
+ Vendor_available *bool
+}
+
+type javaLibraryProperties struct {
+ Name *string
+ Srcs []string
+ Soc_specific *bool
+ Device_specific *bool
+ Product_specific *bool
+ Required []string
+ Sdk_version *string
+ Installable *bool
+ Libs []string
+ Stem *string
+}
+
func syspropLibraryHook(ctx android.LoadHookContext, m *syspropLibrary) {
if len(m.properties.Srcs) == 0 {
ctx.PropertyErrorf("srcs", "sysprop_library must specify srcs")
@@ -304,120 +357,107 @@
return
}
- socSpecific := ctx.SocSpecific()
- deviceSpecific := ctx.DeviceSpecific()
- productSpecific := ctx.ProductSpecific()
-
- owner := m.properties.Property_owner
+ // ctx's Platform or Specific functions represent where this sysprop_library installed.
+ installedInSystem := ctx.Platform() || ctx.SystemExtSpecific()
+ installedInVendorOrOdm := ctx.SocSpecific() || ctx.DeviceSpecific()
+ isOwnerPlatform := false
stub := "sysprop-library-stub-"
- switch owner {
+ switch m.Owner() {
case "Platform":
// Every partition can access platform-defined properties
stub += "platform"
+ isOwnerPlatform = true
case "Vendor":
// System can't access vendor's properties
- if !socSpecific && !deviceSpecific && !productSpecific {
+ if installedInSystem {
ctx.ModuleErrorf("None of soc_specific, device_specific, product_specific is true. " +
"System can't access sysprop_library owned by Vendor")
}
stub += "vendor"
case "Odm":
// Only vendor can access Odm-defined properties
- if !socSpecific && !deviceSpecific {
+ if !installedInVendorOrOdm {
ctx.ModuleErrorf("Neither soc_speicifc nor device_specific is true. " +
"Odm-defined properties should be accessed only in Vendor or Odm")
}
stub += "vendor"
default:
ctx.PropertyErrorf("property_owner",
- "Unknown value %s: must be one of Platform, Vendor or Odm", owner)
+ "Unknown value %s: must be one of Platform, Vendor or Odm", m.Owner())
}
- ccProps := struct {
- Name *string
- Srcs []string
- Soc_specific *bool
- Device_specific *bool
- Product_specific *bool
- Sysprop struct {
- Platform *bool
- }
- Header_libs []string
- Shared_libs []string
- Required []string
- Recovery *bool
- Recovery_available *bool
- Vendor_available *bool
- }{}
-
+ ccProps := ccLibraryProperties{}
ccProps.Name = proptools.StringPtr(m.CcModuleName())
ccProps.Srcs = m.properties.Srcs
- ccProps.Soc_specific = proptools.BoolPtr(socSpecific)
- ccProps.Device_specific = proptools.BoolPtr(deviceSpecific)
- ccProps.Product_specific = proptools.BoolPtr(productSpecific)
- ccProps.Sysprop.Platform = proptools.BoolPtr(owner == "Platform")
+ ccProps.Soc_specific = proptools.BoolPtr(ctx.SocSpecific())
+ ccProps.Device_specific = proptools.BoolPtr(ctx.DeviceSpecific())
+ ccProps.Product_specific = proptools.BoolPtr(ctx.ProductSpecific())
+ ccProps.Sysprop.Platform = proptools.BoolPtr(isOwnerPlatform)
ccProps.Header_libs = []string{"libbase_headers"}
ccProps.Shared_libs = []string{"liblog"}
ccProps.Recovery_available = m.properties.Recovery_available
ccProps.Vendor_available = m.properties.Vendor_available
-
ctx.CreateModule(cc.LibraryFactory, &ccProps)
- // internal scope contains all properties
- // public scope only contains public properties
- // use public if the owner is different from client
scope := "internal"
- isProduct := ctx.ProductSpecific()
- isVendor := ctx.SocSpecific()
- isOwnerPlatform := owner == "Platform"
- if isProduct {
- // product can't own any sysprop_library now, so product must use public scope
+ // We need to only use public version, if the partition where sysprop_library will be installed
+ // is different from owner.
+
+ if ctx.ProductSpecific() {
+ // Currently product partition can't own any sysprop_library.
scope = "public"
- } else if isVendor && isOwnerPlatform {
- // vendor and odm can only use the public properties from the platform
+ } else if isOwnerPlatform && installedInVendorOrOdm {
+ // Vendor or Odm should use public version of Platform's sysprop_library.
scope = "public"
}
- javaGenProps := struct {
- Srcs []string
- Scope string
- Name *string
- }{
+ ctx.CreateModule(syspropJavaGenFactory, &syspropGenProperties{
Srcs: m.properties.Srcs,
Scope: scope,
Name: proptools.StringPtr(m.javaGenModuleName()),
+ })
+
+ ctx.CreateModule(java.LibraryFactory, &javaLibraryProperties{
+ Name: proptools.StringPtr(m.BaseModuleName()),
+ Srcs: []string{":" + m.javaGenModuleName()},
+ Soc_specific: proptools.BoolPtr(ctx.SocSpecific()),
+ Device_specific: proptools.BoolPtr(ctx.DeviceSpecific()),
+ Product_specific: proptools.BoolPtr(ctx.ProductSpecific()),
+ Installable: m.properties.Installable,
+ Sdk_version: proptools.StringPtr("core_current"),
+ Libs: []string{stub},
+ })
+
+ // if platform sysprop_library is installed in /system or /system-ext, we regard it as an API
+ // and allow any modules (even from different partition) to link against the sysprop_library.
+ // To do that, we create a public stub and expose it to modules with sdk_version: system_*.
+ if isOwnerPlatform && installedInSystem {
+ m.properties.Public_stub = proptools.BoolPtr(true)
+ ctx.CreateModule(syspropJavaGenFactory, &syspropGenProperties{
+ Srcs: m.properties.Srcs,
+ Scope: "public",
+ Name: proptools.StringPtr(m.javaGenPublicStubName()),
+ })
+
+ ctx.CreateModule(java.LibraryFactory, &javaLibraryProperties{
+ Name: proptools.StringPtr(m.JavaPublicStubName()),
+ Srcs: []string{":" + m.javaGenPublicStubName()},
+ Installable: proptools.BoolPtr(false),
+ Sdk_version: proptools.StringPtr("core_current"),
+ Libs: []string{stub},
+ Stem: proptools.StringPtr(m.BaseModuleName()),
+ })
}
-
- ctx.CreateModule(syspropJavaGenFactory, &javaGenProps)
-
- javaProps := struct {
- Name *string
- Srcs []string
- Soc_specific *bool
- Device_specific *bool
- Product_specific *bool
- Required []string
- Sdk_version *string
- Installable *bool
- Libs []string
- }{}
-
- javaProps.Name = proptools.StringPtr(m.BaseModuleName())
- javaProps.Srcs = []string{":" + *javaGenProps.Name}
- javaProps.Soc_specific = proptools.BoolPtr(socSpecific)
- javaProps.Device_specific = proptools.BoolPtr(deviceSpecific)
- javaProps.Product_specific = proptools.BoolPtr(productSpecific)
- javaProps.Installable = m.properties.Installable
- javaProps.Sdk_version = proptools.StringPtr("core_current")
- javaProps.Libs = []string{stub}
-
- ctx.CreateModule(java.LibraryFactory, &javaProps)
}
func syspropDepsMutator(ctx android.BottomUpMutatorContext) {
if m, ok := ctx.Module().(*syspropLibrary); ok {
ctx.AddReverseDependency(m, nil, m.javaGenModuleName())
+
+ if proptools.Bool(m.properties.Public_stub) {
+ ctx.AddReverseDependency(m, nil, m.javaGenPublicStubName())
+ }
}
}
diff --git a/sysprop/sysprop_test.go b/sysprop/sysprop_test.go
index 7b90673..c7f8401 100644
--- a/sysprop/sysprop_test.go
+++ b/sysprop/sysprop_test.go
@@ -24,6 +24,7 @@
"strings"
"testing"
+ "github.com/google/blueprint"
"github.com/google/blueprint/proptools"
)
@@ -77,7 +78,8 @@
ctx.BottomUp("vndk", cc.VndkMutator).Parallel()
ctx.BottomUp("version", cc.VersionMutator).Parallel()
ctx.BottomUp("begin", cc.BeginMutator).Parallel()
- ctx.BottomUp("sysprop", cc.SyspropMutator).Parallel()
+ ctx.BottomUp("sysprop_cc", cc.SyspropMutator).Parallel()
+ ctx.BottomUp("sysprop_java", java.SyspropMutator).Parallel()
})
ctx.RegisterModuleType("sysprop_library", syspropLibraryFactory)
@@ -210,6 +212,13 @@
}
java_library {
+ name: "java-platform-private",
+ srcs: ["c.java"],
+ platform_apis: true,
+ libs: ["sysprop-platform"],
+ }
+
+ java_library {
name: "java-product",
srcs: ["c.java"],
sdk_version: "system_current",
@@ -307,6 +316,7 @@
}
ctx.ModuleForTests("sysprop-platform", "android_common")
+ ctx.ModuleForTests("sysprop-platform_public", "android_common")
ctx.ModuleForTests("sysprop-vendor", "android_common")
// Check for exported includes
@@ -359,4 +369,17 @@
t.Errorf("flags for vendor must contain %#v and %#v, but was %#v.",
platformPublicVendorPath, vendorInternalPath, vendorFlags)
}
+
+ // Java modules linking against system API should use public stub
+ javaSystemApiClient := ctx.ModuleForTests("java-platform", "android_common")
+ publicStubFound := false
+ ctx.VisitDirectDeps(javaSystemApiClient.Module(), func(dep blueprint.Module) {
+ if dep.Name() == "sysprop-platform_public" {
+ publicStubFound = true
+ }
+ })
+ if !publicStubFound {
+ t.Errorf("system api client should use public stub")
+ }
+
}