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Commit 6b86dfb1 authored by Ryan Prichard's avatar Ryan Prichard
Browse files

Stop exporting symbols from app_process 

Any symbols exported from the executable override everything else in
every linker namespace. Previously, app_process exported the
signal/sigchain API, but that interposition is now handled by
libsigchain.so.

Bug: http://b/190100879
Test: `nm -D --defined-only app_process{32,64}` shows no symbols
Change-Id: I1ab1fc700c34e91535c3e679a471debbb4eb71e3
parent 46b35eba

cmds/app_process/Android.bp

+10 −1
Original line number Diff line number Diff line
@@ -29,7 +29,16 @@ cc_binary { 
        },

    },



    ldflags: ["-Wl,--export-dynamic"],

    // Symbols exported from the executable in .dynsym interpose symbols in every

    // linker namespace, including an app's classloader namespace. Provide this

    // version script to prevent unwanted interposition.

    //

    // By default, the static linker doesn't export most of an executable's symbols,

    // but it will export a symbol that appears to override a symbol in a needed DSO.

    // This commonly happens with C++ vaguely-linked entities, such as template

    // functions or type_info variables. Hence, a version script is needed even for

    // an executable.

    version_script: "version-script.txt",



    shared_libs: [

        "libandroid_runtime",

cmds/app_process/version-script.txt

0 → 100644
+4 −0
Original line number Diff line number Diff line 
{

  local:

    *;

};