Exclude system shared libs from fix suggestion

This commit removes system shared libs (e.g. libc, libdl, or libm) from
the prebuilt ELF check fix suggestion.

Bug: 141925662
Test: Write a bad Android.mk module and check fix suggestions
Change-Id: I4a827d07b24a976c1910b814126790abbeccc793

1 files changed, 12 insertions, 2 deletions

diff --git a/tools/check_elf_file.py b/tools/check_elf_file.py
index 372404b90b..ca2b93fdae 100755
--- a/tools/check_elf_file.py
+++ b/tools/check_elf_file.py
@@ -397,7 +397,7 @@ class Checker(object):
       sys.exit(2)
 
 
-  def check_dt_needed(self):
+  def check_dt_needed(self, system_shared_lib_names):
     """Check whether all DT_NEEDED entries are specified in the build
     system."""
 
@@ -417,6 +417,11 @@ class Checker(object):
       dt_needed = sorted(set(self._file_under_test.dt_needed))
       modules = [re.sub('\\.so$', '', lib) for lib in dt_needed]
 
+      # Remove system shared libraries from the suggestion since they are added
+      # by default.
+      modules = [name for name in modules
+                 if name not in system_shared_lib_names]
+
       self._note()
       self._note('Fix suggestions:')
       self._note(
@@ -502,6 +507,11 @@ def _parse_args():
   parser.add_argument('--shared-lib', action='append', default=[],
                       help='Path to shared library dependencies')
 
+  # System Shared library names
+  parser.add_argument('--system-shared-lib', action='append', default=[],
+                      help='System shared libraries to be hidden from fix '
+                      'suggestions')
+
   # Check options
   parser.add_argument('--skip-bad-elf-magic', action='store_true',
                       help='Ignore the input file without the ELF magic word')
@@ -535,7 +545,7 @@ def main():
   if args.soname:
     checker.check_dt_soname(args.soname)
 
-  checker.check_dt_needed()
+  checker.check_dt_needed(args.system_shared_lib)
 
   if not args.allow_undefined_symbols:
     checker.check_symbols()