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Commit 751a987b authored by Logan Chien's avatar Logan Chien Committed by Yo Chiang
Browse files

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
parent 4dc54587

core/check_elf_file.mk

+3 −0
Original line number Diff line number Diff line
@@ -14,12 +14,14 @@ 
# - my_installed_module_stem

# - my_prebuilt_src_file

# - my_check_elf_file_shared_lib_files

# - my_system_shared_libraries



ifndef LOCAL_IS_HOST_MODULE

ifneq ($(filter $(LOCAL_MODULE_CLASS),SHARED_LIBRARIES EXECUTABLES NATIVE_TESTS),)

check_elf_files_stamp := $(intermediates)/check_elf_files.timestamp

$(check_elf_files_stamp): PRIVATE_SONAME := $(if $(filter $(LOCAL_MODULE_CLASS),SHARED_LIBRARIES),$(my_installed_module_stem))

$(check_elf_files_stamp): PRIVATE_ALLOW_UNDEFINED_SYMBOLS := $(LOCAL_ALLOW_UNDEFINED_SYMBOLS)

$(check_elf_files_stamp): PRIVATE_SYSTEM_SHARED_LIBRARIES := $(my_system_shared_libraries)

# PRIVATE_SHARED_LIBRARY_FILES are file paths to built shared libraries.

# In addition to $(my_check_elf_file_shared_lib_files), some file paths are

# added by `resolve-shared-libs-for-elf-file-check` from `core/main.mk`.
@@ -33,6 +35,7 @@ $(check_elf_files_stamp): $(my_prebuilt_src_file) $(my_check_elf_file_shared_lib 
	    --skip-unknown-elf-machine \

	    $(if $(PRIVATE_SONAME),--soname $(PRIVATE_SONAME)) \

	    $(foreach l,$(PRIVATE_SHARED_LIBRARY_FILES),--shared-lib $(l)) \

	    $(foreach l,$(PRIVATE_SYSTEM_SHARED_LIBRARIES),--system-shared-lib $(l)) \

	    $(if $(PRIVATE_ALLOW_UNDEFINED_SYMBOLS),--allow-undefined-symbols) \

	    --llvm-readobj=$(LLVM_READOBJ) \

	    $<

tools/check_elf_file.py

+12 −2
Original line number Diff line number Diff line
@@ -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()