Disable sanitizer flags and output files for sanitizer-enabled SDK members.

Test: build/soong/soong_ui.bash --make-mode \
      TARGET_PRODUCT=aosp_blueline_hwasan \
      TARGET_BUILD_VARIANT=userdebug nothing
Test: build/soong/scripts/build-aml-prebuilts.sh \
      runtime-module-{sdk,host-exports} \
      platform-mainline-{sdk,test-exports}
  Check that generated Android.bp files don't differ
Bug: 171754462
Change-Id: Ieef40ff202ceda2d9e613a5d9295f5c9d8160626

cc/library_sdk_member.go

@@ -383,12 +383,25 @@ type nativeLibInfoProperties struct {
 }
 
 func (p *nativeLibInfoProperties) PopulateFromVariant(ctx android.SdkMemberContext, variant android.Module) {
+	addOutputFile := true
 	ccModule := variant.(*Module)
 
-	// If the library has some link types then it produces an output binary file, otherwise it
-	// is header only.
-	if !p.memberType.noOutputFiles {
-		p.outputFile = getRequiredMemberOutputFile(ctx, ccModule)
+	if s := ccModule.sanitize; s != nil {
+		// We currently do not capture sanitizer flags for libs with sanitizers
+		// enabled, because they may vary among variants that cannot be represented
+		// in the input blueprint files. In particular, sanitizerDepsMutator enables
+		// various sanitizers on dependencies, but in many cases only on static
+		// ones, and we cannot specify sanitizer flags at the link type level (i.e.
+		// in StaticOrSharedProperties).
+		if s.isUnsanitizedVariant() {
+			// This still captures explicitly disabled sanitizers, which may be
+			// necessary to avoid cyclic dependencies.
+			p.Sanitize = s.Properties.Sanitize
+		} else {
+			// Do not add the output file to the snapshot if we don't represent it
+			// properly.
+			addOutputFile = false
+		}
 	}
 
 	exportedInfo := ctx.SdkModuleContext().OtherModuleProvider(variant, FlagExporterInfoProvider).(FlagExporterInfo)
@@ -431,8 +444,8 @@ func (p *nativeLibInfoProperties) PopulateFromVariant(ctx android.SdkMemberConte
 		p.StubsVersions = ccModule.AllStubsVersions()
 	}
 
-	if ccModule.sanitize != nil {
-		p.Sanitize = ccModule.sanitize.Properties.Sanitize
+	if !p.memberType.noOutputFiles && addOutputFile {
+		p.outputFile = getRequiredMemberOutputFile(ctx, ccModule)
 	}
 }
 

sdk/cc_sdk_test.go

@@ -464,7 +464,6 @@ func TestSnapshotWithCcSharedLibraryCommonProperties(t *testing.T) {
 				arm64: {
 					export_system_include_dirs: ["arm64/include"],
 					sanitize: {
-						hwaddress: true,
 						integer_overflow: false,
 					},
 				},
@@ -496,7 +495,6 @@ cc_prebuilt_library_shared {
             srcs: ["arm64/lib/mynativelib.so"],
             export_system_include_dirs: ["arm64/include/arm64/include"],
             sanitize: {
-                hwaddress: true,
                 integer_overflow: false,
             },
         },
@@ -527,7 +525,6 @@ cc_prebuilt_library_shared {
             srcs: ["arm64/lib/mynativelib.so"],
             export_system_include_dirs: ["arm64/include/arm64/include"],
             sanitize: {
-                hwaddress: true,
                 integer_overflow: false,
             },
         },
@@ -548,7 +545,7 @@ sdk_snapshot {
 `),
 		checkAllCopyRules(`
 include/Test.h -> include/include/Test.h
-.intermediates/mynativelib/android_arm64_armv8-a_shared_hwasan/mynativelib.so -> arm64/lib/mynativelib.so
+.intermediates/mynativelib/android_arm64_armv8-a_shared/mynativelib.so -> arm64/lib/mynativelib.so
 arm64/include/Arm64Test.h -> arm64/include/arm64/include/Arm64Test.h
 .intermediates/mynativelib/android_arm_armv7-a-neon_shared/mynativelib.so -> arm/lib/mynativelib.so`),
 	)
@@ -2727,3 +2724,75 @@ sdk_snapshot {
 `),
 	)
 }
+
+func TestNoSanitizerMembers(t *testing.T) {
+	result := testSdkWithCc(t, `
+		sdk {
+			name: "mysdk",
+			native_shared_libs: ["mynativelib"],
+		}
+
+		cc_library_shared {
+			name: "mynativelib",
+			srcs: ["Test.cpp"],
+			export_include_dirs: ["include"],
+			arch: {
+				arm64: {
+					export_system_include_dirs: ["arm64/include"],
+					sanitize: {
+						hwaddress: true,
+					},
+				},
+			},
+		}
+	`)
+
+	result.CheckSnapshot("mysdk", "",
+		checkAndroidBpContents(`
+// This is auto-generated. DO NOT EDIT.
+
+cc_prebuilt_library_shared {
+    name: "mysdk_mynativelib@current",
+    sdk_member_name: "mynativelib",
+    visibility: ["//visibility:public"],
+    installable: false,
+    compile_multilib: "both",
+    export_include_dirs: ["include/include"],
+    arch: {
+        arm64: {
+            export_system_include_dirs: ["arm64/include/arm64/include"],
+        },
+        arm: {
+            srcs: ["arm/lib/mynativelib.so"],
+        },
+    },
+}
+
+cc_prebuilt_library_shared {
+    name: "mynativelib",
+    prefer: false,
+    visibility: ["//visibility:public"],
+    compile_multilib: "both",
+    export_include_dirs: ["include/include"],
+    arch: {
+        arm64: {
+            export_system_include_dirs: ["arm64/include/arm64/include"],
+        },
+        arm: {
+            srcs: ["arm/lib/mynativelib.so"],
+        },
+    },
+}
+
+sdk_snapshot {
+    name: "mysdk@current",
+    visibility: ["//visibility:public"],
+    native_shared_libs: ["mysdk_mynativelib@current"],
+}
+`),
+		checkAllCopyRules(`
+include/Test.h -> include/include/Test.h
+arm64/include/Arm64Test.h -> arm64/include/arm64/include/Arm64Test.h
+.intermediates/mynativelib/android_arm_armv7-a-neon_shared/mynativelib.so -> arm/lib/mynativelib.so`),
+	)
+}