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// 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 bionic
import (
"fmt"
"io"
"strings"
"github.com/google/blueprint"
"github.com/google/blueprint/proptools"
"android/soong/android"
"android/soong/cc"
)
// bionic_mountpoint is a module type that is specialized to create
// mount points for Bionic files (libc, libdl, libm, and linker).
//
// With following description,
//
// bionic_mountpoint {
// name: "libc.mountpoint",
// stem: "libc.so",
// src: "dummy_mountpoint",
// library: true,
// symlinks: ["libc.so"],
// }
//
// , the build system does following jobs:
//
// A mount point /bionic/lib[64]/libc.so is created. Its content
// is from the file 'dummy_mountpoint'.
//
// Then a symlink is created at /system/lib[64]/libc.so which points to
// the created mountpoint.
//
// At runtime, on the mount point, either bootstrap Bionic or default Bionic
// (which is from the runtime APEX) is mounted by the init process. The
// symlink exists to provide consistent legacy path for compatibility
// reason.
func init() {
android.RegisterModuleType("bionic_mountpoint", bionicMountpointFactory)
}
type bionicMountpoint struct {
android.ModuleBase
properties bionicMountpointProperties
outputFile android.Path
pathInPartition string
stem string
unstrippedOutputFile android.Path
}
type bionicMountpointProperties struct {
// The file that is installed as the mount point
Src *string
// TODO(jiyong) remove these two properties (probably Stem and Suffix
// as well, as they can be inteffered from Mountsource
// True if the mount point is for a Bionic library such libc.so
Library *bool
// True if the mount point is for a Bionic binary such as linker
Binary *bool
// The module that this module is a mount point for
Mountsource *string
// Base name of the mount point
Stem *string `android:"arch_variant"`
// Append to the name of the output
Suffix *string `android:"arch_variant"`
// Symlinks to the mountpoints from the system and recovery partitions
// Symlinks names will have the same suffix as the mount point
Symlinks []string
}
type dependencyTag struct {
blueprint.BaseDependencyTag
name string
}
var mountsourceTag = dependencyTag{name: "mountsource"}
func (m *bionicMountpoint) DepsMutator(ctx android.BottomUpMutatorContext) {
if Bool(m.properties.Library) == Bool(m.properties.Binary) {
ctx.ModuleErrorf("either binary or library must be set to true")
return
}
if m.properties.Stem == nil {
ctx.PropertyErrorf("stem", "stem must be set")
return
}
if m.properties.Src == nil {
ctx.PropertyErrorf("src", "src must be set")
}
android.ExtractSourceDeps(ctx, m.properties.Src)
if m.properties.Mountsource == nil {
ctx.PropertyErrorf("mountsource", "mountsource must be set")
return
}
ctx.AddFarVariationDependencies([]blueprint.Variation{
{Mutator: "arch", Variation: ctx.Target().String()},
{Mutator: "image", Variation: "core"},
{Mutator: "link", Variation: "shared"},
}, mountsourceTag, String(m.properties.Mountsource))
}
func (m *bionicMountpoint) GenerateAndroidBuildActions(ctx android.ModuleContext) {
if Bool(m.properties.Library) {
m.pathInPartition = "lib"
if m.Arch().ArchType.Multilib == "lib64" {
m.pathInPartition = "lib64"
}
} else if Bool(m.properties.Binary) {
m.pathInPartition = "bin"
}
m.stem = String(m.properties.Stem) + String(m.properties.Suffix)
m.outputFile = ctx.ExpandSource(String(m.properties.Src), "src")
ctx.VisitDirectDepsWithTag(mountsourceTag, func(module android.Module) {
if cc, ok := module.(*cc.Module); ok {
m.unstrippedOutputFile = cc.UnstrippedOutputFile()
}
})
}
func (m *bionicMountpoint) AndroidMk() android.AndroidMkData {
return android.AndroidMkData {
Custom: func(w io.Writer, name, prefix, moduleDir string, data android.AndroidMkData) {
if !m.Arch().Native {
return
}
fmt.Fprintln(w, "\ninclude $(CLEAR_VARS)")
fmt.Fprintln(w, "LOCAL_PATH :=", moduleDir)
fmt.Fprintln(w, "LOCAL_MODULE :=", name)
fmt.Fprintln(w, "LOCAL_USE_CLANG_LLD := false")
fmt.Fprintln(w, "LOCAL_STRIP_MODULE := false")
if Bool(m.properties.Library) {
fmt.Fprintln(w, "LOCAL_MODULE_CLASS := SHARED_LIBRARIES")
} else if Bool(m.properties.Binary) {
fmt.Fprintln(w, "LOCAL_MODULE_CLASS := EXECUTABLES")
}
fmt.Fprintln(w, "LOCAL_MODULE_TAGS := optional")
fmt.Fprintln(w, "LOCAL_PREBUILT_MODULE_FILE :=", m.outputFile.String())
fmt.Fprintln(w, "LOCAL_MODULE_TARGET_ARCH :=", m.Arch().ArchType.String())
fmt.Fprintln(w, "LOCAL_MODULE_PATH :=", "$(TARGET_ROOT_OUT)/bionic/" + m.pathInPartition)
fmt.Fprintln(w, "LOCAL_INSTALLED_MODULE_STEM :=", m.stem)
if len(m.properties.Symlinks) > 0 {
symlink_dir_in_system := "$(TARGET_OUT)/" + m.pathInPartition + "/"
symlink_dir_in_recovery := "$(TARGET_RECOVERY_ROOT_OUT)/system/" + m.pathInPartition + "/"
symlink_target := "/bionic/" + m.pathInPartition + "/" + m.stem
cmds := []string{}
cmds = append(cmds, "$(hide) mkdir -p " + symlink_dir_in_system)
cmds = append(cmds, "mkdir -p " + symlink_dir_in_recovery)
for _, s := range m.properties.Symlinks {
symlink := s + String(m.properties.Suffix)
cmds = append(cmds, "ln -sf " + symlink_target + " " + symlink_dir_in_system + symlink)
cmds = append(cmds, "ln -sf " + symlink_target + " " + symlink_dir_in_recovery + symlink)
}
fmt.Fprintln(w, "LOCAL_POST_INSTALL_CMD := " + strings.Join(cmds, " && "))
}
if m.unstrippedOutputFile != nil {
fmt.Fprintln(w, "LOCAL_SOONG_UNSTRIPPED_BINARY :=", m.unstrippedOutputFile.String())
}
fmt.Fprintln(w, "include $(BUILD_SYSTEM)/soong_cc_prebuilt.mk")
},
}
}
func bionicMountpointFactory() android.Module {
m := &bionicMountpoint{}
m.AddProperties(&m.properties)
android.InitAndroidArchModule(m, android.DeviceSupported, android.MultilibBoth)
return m
}
var Bool = proptools.Bool
var String = proptools.String
|
