From 6422a80df992e4542dbd4fb70a04f316065674af Mon Sep 17 00:00:00 2001 From: Rahul Chaudhry Date: Tue, 28 Jun 2016 14:33:51 -0700 Subject: Remove warning about references from shared objects to hidden symbols. Bug: 21502954 This patch is backported from upstream - commit c20ceeb226168ffd84078ef74d890c2b7f69a435 Author: Yiran Wang Date: Mon Jul 20 08:47:57 2015 -0700 Remove warning about references from shared objects to hidden symbols. gold/ PR gold/15574 * resolve.cc (Symbol_table): Remove warning about references from shared objects to hidden symbols. * testsuite/Makefile.am (hidden_test): Add hidden_test.syms. * testsuite/Makefile.in: Regenerate. * testsuite/hidden_test.sh: Check dynamic symbol table; update expected error messages. Change-Id: Ie6fb67071c7f478859069b7b4bf629cd44f91844 --- binutils-2.25/gold/ChangeLog | 11 +++++++++++ binutils-2.25/gold/resolve.cc | 13 ++++--------- binutils-2.25/gold/testsuite/Makefile.am | 4 +++- binutils-2.25/gold/testsuite/Makefile.in | 3 +++ binutils-2.25/gold/testsuite/hidden_test.sh | 24 ++++++++++++++---------- 5 files changed, 35 insertions(+), 20 deletions(-) diff --git a/binutils-2.25/gold/ChangeLog b/binutils-2.25/gold/ChangeLog index cd957520..9e84837e 100644 --- a/binutils-2.25/gold/ChangeLog +++ b/binutils-2.25/gold/ChangeLog @@ -1,3 +1,14 @@ +2015-07-20 Yiran Wang + Cary Coutant + + PR gold/15574 + * resolve.cc (Symbol_table): Remove warning about references + from shared objects to hidden symbols. + * testsuite/Makefile.am (hidden_test): Add hidden_test.syms. + * testsuite/Makefile.in: Regenerate. + * testsuite/hidden_test.sh: Check dynamic symbol table; update + expected error messages. + 2016-06-28 Rahul Chaudhry Revert patch -- to be replaced by the upstream patch with tests. diff --git a/binutils-2.25/gold/resolve.cc b/binutils-2.25/gold/resolve.cc index 07dff4ad..b49c45c2 100644 --- a/binutils-2.25/gold/resolve.cc +++ b/binutils-2.25/gold/resolve.cc @@ -279,15 +279,10 @@ Symbol_table::resolve(Sized_symbol* to, && (to->visibility() == elfcpp::STV_HIDDEN || to->visibility() == elfcpp::STV_INTERNAL)) { - // A dynamic object cannot reference a hidden or internal symbol - // defined in another object. - gold_warning(_("%s symbol '%s' in %s is referenced by DSO %s"), - (to->visibility() == elfcpp::STV_HIDDEN - ? "hidden" - : "internal"), - to->demangled_name().c_str(), - to->object()->name().c_str(), - object->name().c_str()); + // The symbol is hidden, so a reference from a shared object + // cannot bind to it. We tried issuing a warning in this case, + // but that produces false positives when the symbol is + // actually resolved in a different shared object (PR 15574). return; } else diff --git a/binutils-2.25/gold/testsuite/Makefile.am b/binutils-2.25/gold/testsuite/Makefile.am index a9caa6bc..ce1af05a 100644 --- a/binutils-2.25/gold/testsuite/Makefile.am +++ b/binutils-2.25/gold/testsuite/Makefile.am @@ -1894,11 +1894,13 @@ endif MCMODEL_MEDIUM # referenced by a shared library. check_SCRIPTS += hidden_test.sh check_DATA += hidden_test.err -MOSTLYCLEANFILES += hidden_test hidden_test.err +MOSTLYCLEANFILES += hidden_test hidden_test.err hidden_test.syms libhidden.so: hidden_test_1.c gcctestdir/ld $(COMPILE) -Bgcctestdir/ -g -shared -fPIC -w -o $@ $(srcdir)/hidden_test_1.c hidden_test: hidden_test_main.o libhidden.so gcctestdir/ld $(LINK) -Bgcctestdir/ -Wl,-R,. hidden_test_main.o libhidden.so 2>hidden_test.err +hidden_test.syms: hidden_test + $(TEST_NM) -D hidden_test > $@ hidden_test.err: hidden_test @touch hidden_test.err diff --git a/binutils-2.25/gold/testsuite/Makefile.in b/binutils-2.25/gold/testsuite/Makefile.in index 3cdf45e6..17a73fdf 100644 --- a/binutils-2.25/gold/testsuite/Makefile.in +++ b/binutils-2.25/gold/testsuite/Makefile.in @@ -507,6 +507,7 @@ check_PROGRAMS = $(am__EXEEXT_1) $(am__EXEEXT_2) $(am__EXEEXT_3) \ @GCC_TRUE@@TEST_AS_NATIVE_LINKER_TRUE@ discard_locals_relocatable_test2.out \ @GCC_TRUE@@TEST_AS_NATIVE_LINKER_TRUE@ hidden_test \ @GCC_TRUE@@TEST_AS_NATIVE_LINKER_TRUE@ hidden_test.err \ +@GCC_TRUE@@TEST_AS_NATIVE_LINKER_TRUE@ hidden_test.syms \ @GCC_TRUE@@TEST_AS_NATIVE_LINKER_TRUE@ retain_symbols_file_test \ @GCC_TRUE@@TEST_AS_NATIVE_LINKER_TRUE@ retain_symbols_file_test.in \ @GCC_TRUE@@TEST_AS_NATIVE_LINKER_TRUE@ retain_symbols_file_test.stdout \ @@ -5624,6 +5625,8 @@ uninstall-am: @GCC_TRUE@@TEST_AS_NATIVE_LINKER_TRUE@ $(COMPILE) -Bgcctestdir/ -g -shared -fPIC -w -o $@ $(srcdir)/hidden_test_1.c @GCC_TRUE@@TEST_AS_NATIVE_LINKER_TRUE@hidden_test: hidden_test_main.o libhidden.so gcctestdir/ld @GCC_TRUE@@TEST_AS_NATIVE_LINKER_TRUE@ $(LINK) -Bgcctestdir/ -Wl,-R,. hidden_test_main.o libhidden.so 2>hidden_test.err +@GCC_TRUE@@TEST_AS_NATIVE_LINKER_TRUE@hidden_test.syms: hidden_test +@GCC_TRUE@@TEST_AS_NATIVE_LINKER_TRUE@ $(TEST_NM) -D hidden_test > $@ @GCC_TRUE@@TEST_AS_NATIVE_LINKER_TRUE@hidden_test.err: hidden_test @GCC_TRUE@@TEST_AS_NATIVE_LINKER_TRUE@ @touch hidden_test.err @GCC_TRUE@@TEST_AS_NATIVE_LINKER_TRUE@retain_symbols_file_test.so: basic_pic_test.o gcctestdir/ld diff --git a/binutils-2.25/gold/testsuite/hidden_test.sh b/binutils-2.25/gold/testsuite/hidden_test.sh index 39ebbf68..05633d04 100755 --- a/binutils-2.25/gold/testsuite/hidden_test.sh +++ b/binutils-2.25/gold/testsuite/hidden_test.sh @@ -29,11 +29,11 @@ # error messages are issued for the references to internal and # hidden symbols. The errors will be found in hidden_test.err. -check() +check_missing() { - if ! grep -q "$2" "$1" + if grep -q "$2" "$1" then - echo "Did not find expected error in $1:" + echo "Found unexpected error in $1:" echo " $2" echo "" echo "Actual error output below:" @@ -42,25 +42,29 @@ check() fi } -check_missing() +check_missing_sym() { if grep -q "$2" "$1" then - echo "Found unexpected error in $1:" + echo "Found unexpected symbol in $1:" echo " $2" echo "" - echo "Actual error output below:" + echo "Actual nm output below:" cat "$1" exit 1 fi } -# We should see errors for hidden and internal symbols. -check hidden_test.err "hidden symbol 'main_hidden' in hidden_test_main.o is referenced by DSO libhidden.so" -check hidden_test.err "internal symbol 'main_internal' in hidden_test_main.o is referenced by DSO libhidden.so" - # We shouldn't see errors for the default and protected symbols. check_missing hidden_test.err "main_default" check_missing hidden_test.err "main_protected" +# We shouldn't see errors for the hidden and internal symbols either (PR 15574). +check_missing hidden_test.err "main_hidden" +check_missing hidden_test.err "main_internal" + +# We shouldn't see the hidden or internal symbols in the dynamic symbol table. +check_missing_sym hidden_test.syms "main_hidden" +check_missing_sym hidden_test.syms "main_internal" + exit 0 -- cgit v1.2.3