Strip libgcc to only keep fallback symbols
We use libgcc as fallback for symbols not present in libclang_rt
builtins, however we didn't know what exact symbols were being used,
some may not be intended to fallback.
Create libgcc_stripped, which only contains unwind symbols from libgcc.
Bug: 29275768
Test: bionic-unit-tests
Change-Id: I5b349fa6138e51663bf3b67109b880b4356da8e8
diff --git a/Android.bp b/Android.bp
index 1fdd44e..014e589 100644
--- a/Android.bp
+++ b/Android.bp
@@ -483,6 +483,117 @@
}
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,
enabled: false,