Revert "Remove the codegen property"

This revert was created by Android Culprit Assistant. The culprit was identified in the following culprit search session (http://go/aca-get/88fe93a5-fc12-490e-8914-e81bb746b001).

Change-Id: I87dc85008a9c79c017055ae641f41809d19b1c78

1 files changed, 239 insertions, 0 deletions

diff --git a/build/codegen.go b/build/codegen.go
new file mode 100644
index 0000000000..3cc51a8e1f
--- /dev/null
+++ b/build/codegen.go
@@ -0,0 +1,239 @@
+// Copyright (C) 2016 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 art
+
+// This file implements the "codegen" property to apply different properties based on the currently
+// selected codegen arches, which defaults to all arches on the host and the primary and secondary
+// arches on the device.
+
+import (
+	"sort"
+	"strings"
+
+	"android/soong/android"
+)
+
+type moduleType struct {
+	library bool
+	static  bool
+	shared  bool
+}
+
+var (
+	staticLibrary          = moduleType{true, true, false}
+	sharedLibrary          = moduleType{true, false, true}
+	staticAndSharedLibrary = moduleType{true, true, true}
+	binary                 = moduleType{false, false, false}
+)
+
+func codegen(ctx android.LoadHookContext, c *codegenProperties, t moduleType) {
+	var hostArches, deviceArches []string
+
+	e := ctx.Config().Getenv("ART_HOST_CODEGEN_ARCHS")
+	if e == "" {
+		hostArches = supportedArches
+	} else {
+		hostArches = strings.Split(e, " ")
+	}
+
+	e = ctx.Config().Getenv("ART_TARGET_CODEGEN_ARCHS")
+	if e == "" {
+		deviceArches = defaultDeviceCodegenArches(ctx)
+	} else {
+		deviceArches = strings.Split(e, " ")
+	}
+
+	getCodegenArchProperties := func(archName string) *codegenArchProperties {
+		var arch *codegenArchProperties
+		switch archName {
+		case "arm":
+			arch = &c.Codegen.Arm
+		case "arm64":
+			arch = &c.Codegen.Arm64
+		case "riscv64":
+			arch = &c.Codegen.Riscv64
+		case "x86":
+			arch = &c.Codegen.X86
+		case "x86_64":
+			arch = &c.Codegen.X86_64
+		default:
+			ctx.ModuleErrorf("Unknown codegen architecture %q", archName)
+		}
+		return arch
+	}
+
+	appendCodegenSourceArchProperties := func(p *CodegenSourceArchProperties, archName string) {
+		arch := getCodegenArchProperties(archName)
+		p.Srcs = append(p.Srcs, arch.CodegenSourceArchProperties.Srcs...)
+	}
+
+	addCodegenSourceArchProperties := func(host bool, p *CodegenSourceArchProperties) {
+		type sourceProps struct {
+			Target struct {
+				Android *CodegenSourceArchProperties
+				Host    *CodegenSourceArchProperties
+			}
+		}
+
+		sp := &sourceProps{}
+		if host {
+			sp.Target.Host = p
+		} else {
+			sp.Target.Android = p
+		}
+		ctx.AppendProperties(sp)
+	}
+
+	addCodegenArchProperties := func(host bool, archName string) {
+		type commonProps struct {
+			Target struct {
+				Android *CodegenCommonArchProperties
+				Host    *CodegenCommonArchProperties
+			}
+		}
+
+		type libraryProps struct {
+			Target struct {
+				Android *CodegenLibraryArchProperties
+				Host    *CodegenLibraryArchProperties
+			}
+		}
+
+		type sharedLibraryProps struct {
+			Target struct {
+				Android *CodegenLibraryArchSharedProperties
+				Host    *CodegenLibraryArchSharedProperties
+			}
+		}
+
+		type staticLibraryProps struct {
+			Target struct {
+				Android *CodegenLibraryArchStaticProperties
+				Host    *CodegenLibraryArchStaticProperties
+			}
+		}
+
+		arch := getCodegenArchProperties(archName)
+
+		cp := &commonProps{}
+		lp := &libraryProps{}
+		sharedLP := &sharedLibraryProps{}
+		staticLP := &staticLibraryProps{}
+		if host {
+			cp.Target.Host = &arch.CodegenCommonArchProperties
+			lp.Target.Host = &arch.CodegenLibraryArchProperties
+			sharedLP.Target.Host = &arch.CodegenLibraryArchSharedProperties
+			staticLP.Target.Host = &arch.CodegenLibraryArchStaticProperties
+		} else {
+			cp.Target.Android = &arch.CodegenCommonArchProperties
+			lp.Target.Android = &arch.CodegenLibraryArchProperties
+			sharedLP.Target.Android = &arch.CodegenLibraryArchSharedProperties
+			staticLP.Target.Android = &arch.CodegenLibraryArchStaticProperties
+		}
+
+		ctx.AppendProperties(cp)
+		if t.library {
+			ctx.AppendProperties(lp)
+			if t.static {
+				ctx.AppendProperties(staticLP)
+			}
+			if t.shared {
+				ctx.AppendProperties(sharedLP)
+			}
+		}
+	}
+
+	addCodegenProperties := func(host bool, arches []string) {
+		sourceProps := &CodegenSourceArchProperties{}
+		for _, arch := range arches {
+			appendCodegenSourceArchProperties(sourceProps, arch)
+			addCodegenArchProperties(host, arch)
+		}
+		sourceProps.Srcs = android.FirstUniqueStrings(sourceProps.Srcs)
+		addCodegenSourceArchProperties(host, sourceProps)
+	}
+
+	addCodegenProperties(false /* host */, deviceArches)
+	addCodegenProperties(true /* host */, hostArches)
+}
+
+// These properties are allowed to contain the same source file name in different architectures.
+// They we will be deduplicated automatically.
+type CodegenSourceArchProperties struct {
+	Srcs []string
+}
+
+type CodegenCommonArchProperties struct {
+	Cflags   []string
+	Cppflags []string
+}
+
+type CodegenLibraryArchProperties struct {
+	Static_libs               []string
+	Export_static_lib_headers []string
+}
+
+type CodegenLibraryArchStaticProperties struct {
+	Static struct {
+		Whole_static_libs []string
+	}
+}
+type CodegenLibraryArchSharedProperties struct {
+	Shared struct {
+		Shared_libs               []string
+		Export_shared_lib_headers []string
+	}
+}
+
+type codegenArchProperties struct {
+	CodegenSourceArchProperties
+	CodegenCommonArchProperties
+	CodegenLibraryArchProperties
+	CodegenLibraryArchStaticProperties
+	CodegenLibraryArchSharedProperties
+}
+
+type codegenProperties struct {
+	Codegen struct {
+		Arm, Arm64, Riscv64, X86, X86_64 codegenArchProperties
+	}
+}
+
+func defaultDeviceCodegenArches(ctx android.LoadHookContext) []string {
+	arches := make(map[string]bool)
+	for _, a := range ctx.DeviceConfig().Arches() {
+		s := a.ArchType.String()
+		arches[s] = true
+		if s == "arm64" {
+			arches["arm"] = true
+		} else if s == "riscv64" {
+			arches["riscv64"] = true
+		} else if s == "x86_64" {
+			arches["x86"] = true
+		}
+	}
+	ret := make([]string, 0, len(arches))
+	for a := range arches {
+		ret = append(ret, a)
+	}
+	sort.Strings(ret)
+	return ret
+}
+
+func installCodegenCustomizer(module android.Module, t moduleType) {
+	c := &codegenProperties{}
+	android.AddLoadHook(module, func(ctx android.LoadHookContext) { codegen(ctx, c, t) })
+	module.AddProperties(c)
+}