Merge "Strip libgcc to only keep fallback symbols" (6e146400) · Commits · e / os / android_build_soong

Android.bp

+111 −0

Original line number	Diff line number	Diff line
		@@ -483,6 +483,117 @@ toolchain_library {
		},
		}

		toolchain_library {
		name: "libgcc_stripped",
		defaults: ["linux_bionic_supported"],
		vendor_available: true,
		recovery_available: true,

		arch: {
		arm: {
		src: "prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.9/lib/gcc/arm-linux-androideabi/4.9.x/libgcc.a",
		strip: {
		keep_symbols_list: [
		// unwind-arm.o
		"_Unwind_Complete",
		"_Unwind_DeleteException",
		"_Unwind_GetCFA",
		"_Unwind_VRS_Get",
		"_Unwind_VRS_Pop",
		"_Unwind_VRS_Set",
		"__aeabi_unwind_cpp_pr0",
		"__aeabi_unwind_cpp_pr1",
		"__aeabi_unwind_cpp_pr2",
		"__gnu_Unwind_Backtrace",
		"__gnu_Unwind_ForcedUnwind",
		"__gnu_Unwind_RaiseException",
		"__gnu_Unwind_Resume",
		"__gnu_Unwind_Resume_or_Rethrow",

		// libunwind.o
		"_Unwind_Backtrace",
		"_Unwind_ForcedUnwind",
		"_Unwind_RaiseException",
		"_Unwind_Resume",
		"_Unwind_Resume_or_Rethrow",
		"___Unwind_Backtrace",
		"___Unwind_ForcedUnwind",
		"___Unwind_RaiseException",
		"___Unwind_Resume",
		"___Unwind_Resume_or_Rethrow",
		"__gnu_Unwind_Restore_VFP",
		"__gnu_Unwind_Restore_VFP_D",
		"__gnu_Unwind_Restore_VFP_D_16_to_31",
		"__gnu_Unwind_Restore_WMMXC",
		"__gnu_Unwind_Restore_WMMXD",
		"__gnu_Unwind_Save_VFP",
		"__gnu_Unwind_Save_VFP_D",
		"__gnu_Unwind_Save_VFP_D_16_to_31",
		"__gnu_Unwind_Save_WMMXC",
		"__gnu_Unwind_Save_WMMXD",
		"__restore_core_regs",
		"restore_core_regs",

		// pr-support.o
		"_Unwind_GetDataRelBase",
		"_Unwind_GetLanguageSpecificData",
		"_Unwind_GetRegionStart",
		"_Unwind_GetTextRelBase",
		"__gnu_unwind_execute",
		"__gnu_unwind_frame",
		],
		use_gnu_strip: true,
		},
		},
		arm64: {
		src: "prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9/lib/gcc/aarch64-linux-android/4.9.x/libgcc.a",
		},
		x86: {
		src: "prebuilts/gcc/linux-x86/x86/x86_64-linux-android-4.9/lib/gcc/x86_64-linux-android/4.9.x/32/libgcc.a",

		},
		x86_64: {
		src: "prebuilts/gcc/linux-x86/x86/x86_64-linux-android-4.9/lib/gcc/x86_64-linux-android/4.9.x/libgcc.a",
		},
		},
		strip: {
		keep_symbols_list: [
		// unwind-dw2.o
		"_Unwind_Backtrace",
		"_Unwind_DeleteException",
		"_Unwind_FindEnclosingFunction",
		"_Unwind_ForcedUnwind",
		"_Unwind_GetCFA",
		"_Unwind_GetDataRelBase",
		"_Unwind_GetGR",
		"_Unwind_GetIP",
		"_Unwind_GetIPInfo",
		"_Unwind_GetLanguageSpecificData",
		"_Unwind_GetRegionStart",
		"_Unwind_GetTextRelBase",
		"_Unwind_RaiseException",
		"_Unwind_Resume",
		"_Unwind_Resume_or_Rethrow",
		"_Unwind_SetGR",
		"_Unwind_SetIP",
		"__frame_state_for",

		// unwind-dw2-fde-dip.o
		"_Unwind_Find_FDE",
		"__deregister_frame",
		"__deregister_frame_info",
		"__deregister_frame_info_bases",
		"__register_frame",
		"__register_frame_info",
		"__register_frame_info_bases",
		"__register_frame_info_table",
		"__register_frame_info_table_bases",
		"__register_frame_table",
		],
		use_gnu_strip: true,
		},
		}

		toolchain_library {
		name: "libwinpthread",
		host_supported: true,

apex/apex_test.go

+7 −0

Original line number	Diff line number	Diff line
		@@ -92,6 +92,13 @@ func testApex(t testing.T, bp string) android.TestContext {
		recovery_available: true,
		}

		toolchain_library {
		name: "libgcc_stripped",
		src: "",
		vendor_available: true,
		recovery_available: true,
		}

		toolchain_library {
		name: "libclang_rt.builtins-aarch64-android",
		src: "",

cc/builder.go

+4 −0

Original line number	Diff line number	Diff line
		@@ -255,6 +255,7 @@ type builderFlags struct {
		groupStaticLibs bool

		stripKeepSymbols bool
		stripKeepSymbolsList string
		stripKeepMiniDebugInfo bool
		stripAddGnuDebuglink bool
		stripUseGnuStrip bool
		@@ -835,6 +836,9 @@ func TransformStrip(ctx android.ModuleContext, inputFile android.Path,
		if flags.stripKeepSymbols {
		args += " --keep-symbols"
		}
		if flags.stripKeepSymbolsList != "" {
		args += " -k" + flags.stripKeepSymbolsList
		}
		if flags.stripUseGnuStrip {
		args += " --use-gnu-strip"
		}

cc/cc_test.go

+2 −2

Original line number	Diff line number	Diff line
		@@ -1833,13 +1833,13 @@ func TestStaticLibDepExport(t *testing.T) {
		// Check the shared version of lib2.
		variant := "android_arm64_armv8-a_core_shared"
		module := ctx.ModuleForTests("lib2", variant).Module().(*Module)
		checkStaticLibs(t, []string{"lib1", "libclang_rt.builtins-aarch64-android", "libatomic", "libgcc"}, module)
		checkStaticLibs(t, []string{"lib1", "libclang_rt.builtins-aarch64-android", "libatomic", "libgcc_stripped"}, module)

		// Check the static version of lib2.
		variant = "android_arm64_armv8-a_core_static"
		module = ctx.ModuleForTests("lib2", variant).Module().(*Module)
		// libc++_static is linked additionally.
		checkStaticLibs(t, []string{"lib1", "libc++_static", "libclang_rt.builtins-aarch64-android", "libatomic", "libgcc"}, module)
		checkStaticLibs(t, []string{"lib1", "libc++_static", "libclang_rt.builtins-aarch64-android", "libatomic", "libgcc_stripped"}, module)
		}

		var compilerFlagsTestCases = []struct {

cc/linker.go

+4 −4

Original line number	Diff line number	Diff line
		@@ -228,10 +228,10 @@ func (linker *baseLinker) linkerDeps(ctx DepsContext, deps Deps) Deps {
		// libclang_rt.builtins, libgcc and libatomic have to be last on the command line
		if !Bool(linker.Properties.No_libcrt) {
		deps.LateStaticLibs = append(deps.LateStaticLibs, config.BuiltinsRuntimeLibrary(ctx.toolchain()))
		}

		deps.LateStaticLibs = append(deps.LateStaticLibs, "libatomic")
		if !Bool(linker.Properties.No_libgcc) {
		deps.LateStaticLibs = append(deps.LateStaticLibs, "libgcc_stripped")
		} else if !Bool(linker.Properties.No_libgcc) {
		deps.LateStaticLibs = append(deps.LateStaticLibs, "libatomic")
		deps.LateStaticLibs = append(deps.LateStaticLibs, "libgcc")
		}