+2008-07-23 Ian Lance Taylor <iant@google.com>
+
+ PR 6647
+ * script.cc (Version_script_info::get_versions): Don't add empty
+ version tag to return value.
+ (Version_script_info::get_symbol_version_helper): Change return
+ type to bool. Add pversion parameter. Change all callers.
+ (script_register_vers_node): Don't require a non-NULL tag.
+ * script.h (class Version_script_info): Update declarations.
+ (Version_script_info::get_symbol_version): Change return type to
+ bool. Add version parameter. Change all callers.
+ * symtab.cc (Sized_symbol::add_from_relobj): Rework version
+ handling. Handle an empty version from a version script.
+ (Symbol_table::define_special_symbol): Likewise.
+ * testsuite/ver_test_10.script: New file.
+ * testsuite/ver_test_10.sh: New file.
+ * testsuite/Makefile.am (check_SCRIPTS): Add ver_test_10.sh.
+ (check_DATA): Add ver_test_10.syms.
+ (ver_test_10.syms, ver_test_10.so): New target.
+ * testsuite/Makefile.in: Rebuild.
+
2008-07-23 Simon Baldwin <simonb@google.com>
* symtab.cc (Symbol_table::sized_write_symbol): Only set st_size
{
std::vector<std::string> ret;
for (size_t j = 0; j < version_trees_.size(); ++j)
- ret.push_back(version_trees_[j]->tag);
+ if (!this->version_trees_[j]->tag.empty())
+ ret.push_back(this->version_trees_[j]->tag);
return ret;
}
return ret;
}
-const std::string&
+// Look up SYMBOL_NAME in the list of versions. If CHECK_GLOBAL is
+// true look at the globally visible symbols, otherwise look at the
+// symbols listed as "local:". Return true if the symbol is found,
+// false otherwise. If the symbol is found, then if PVERSION is not
+// NULL, set *PVERSION to the version.
+
+bool
Version_script_info::get_symbol_version_helper(const char* symbol_name,
- bool check_global) const
+ bool check_global,
+ std::string* pversion) const
{
for (size_t j = 0; j < version_trees_.size(); ++j)
{
if (demangled_name != NULL)
free(demangled_name);
if (matched)
- return version_trees_[j]->tag;
+ {
+ if (pversion != NULL)
+ *pversion = this->version_trees_[j]->tag;
+ return true;
+ }
}
}
- static const std::string empty = "";
- return empty;
+ return false;
}
struct Version_dependency_list*
struct Version_dependency_list *deps)
{
gold_assert(tree != NULL);
- gold_assert(tag != NULL);
tree->dependencies = deps;
- tree->tag = std::string(tag, taglen);
+ if (tag != NULL)
+ tree->tag = std::string(tag, taglen);
}
// Add a dependencies to the list of existing dependencies, if any,
empty() const
{ return this->version_trees_.empty(); }
- // Return the version associated with the given symbol name.
- // Strings are allocated out of the stringpool given in the
- // constructor. Strings are allocated out of the stringpool given
- // in the constructor.
- const std::string&
- get_symbol_version(const char* symbol) const
- { return get_symbol_version_helper(symbol, true); }
-
- // Return whether this symbol matches the local: section of a
- // version script (it doesn't matter which).
+ // If there is a version associated with SYMBOL, return true, and
+ // set *VERSION to the version. Otherwise, return false.
+ bool
+ get_symbol_version(const char* symbol, std::string* version) const
+ { return this->get_symbol_version_helper(symbol, true, version); }
+
+ // Return whether this symbol matches the local: section of some
+ // version.
bool
symbol_is_local(const char* symbol) const
- {
- return (get_symbol_version(symbol).empty()
- && !get_symbol_version_helper(symbol, false).empty());
- }
+ { return this->get_symbol_version_helper(symbol, false, NULL); }
// Return the names of versions defined in the version script.
// Strings are allocated out of the stringpool given in the
void
print_expression_list(FILE* f, const Version_expression_list*) const;
- const std::string& get_symbol_version_helper(const char* symbol,
- bool check_global) const;
+ bool get_symbol_version_helper(const char* symbol,
+ bool check_global,
+ std::string* pversion) const;
std::vector<struct Version_dependency_list*> dependency_lists_;
std::vector<struct Version_expression_list*> expression_lists_;
// name from the version name. If there are two '@' characters,
// this is the default version.
const char* ver = strchr(name, '@');
+ Stringpool::Key ver_key = 0;
int namelen = 0;
// DEF: is the version default? LOCAL: is the symbol forced local?
bool def = false;
def = true;
++ver;
}
+ ver = this->namepool_.add(ver, true, &ver_key);
}
// We don't want to assign a version to an undefined symbol,
// even if it is listed in the version script. FIXME: What
// about a common symbol?
- else if (!version_script_.empty()
- && st_shndx != elfcpp::SHN_UNDEF)
- {
- // The symbol name did not have a version, but
- // the version script may assign a version anyway.
- namelen = strlen(name);
- def = true;
- // Check the global: entries from the version script.
- const std::string& version =
- version_script_.get_symbol_version(name);
- if (!version.empty())
- ver = version.c_str();
- // Check the local: entries from the version script
- if (version_script_.symbol_is_local(name))
- local = true;
- }
+ else
+ {
+ namelen = strlen(name);
+ if (!this->version_script_.empty()
+ && st_shndx != elfcpp::SHN_UNDEF)
+ {
+ // The symbol name did not have a version, but the
+ // version script may assign a version anyway.
+ std::string version;
+ if (this->version_script_.get_symbol_version(name, &version))
+ {
+ // The version can be empty if the version script is
+ // only used to force some symbols to be local.
+ if (!version.empty())
+ {
+ ver = this->namepool_.add_with_length(version.c_str(),
+ version.length(),
+ true,
+ &ver_key);
+ def = true;
+ }
+ }
+ else if (this->version_script_.symbol_is_local(name))
+ local = true;
+ }
+ }
elfcpp::Sym<size, big_endian>* psym = &sym;
unsigned char symbuf[sym_size];
psym = &sym2;
}
+ Stringpool::Key name_key;
+ name = this->namepool_.add_with_length(name, namelen, true,
+ &name_key);
+
Sized_symbol<size>* res;
- if (ver == NULL)
- {
- Stringpool::Key name_key;
- name = this->namepool_.add(name, true, &name_key);
- res = this->add_from_object(relobj, name, name_key, NULL, 0,
- false, *psym, st_shndx, is_ordinary,
- orig_st_shndx);
- if (local)
- this->force_local(res);
- }
- else
- {
- Stringpool::Key name_key;
- name = this->namepool_.add_with_length(name, namelen, true,
- &name_key);
- Stringpool::Key ver_key;
- ver = this->namepool_.add(ver, true, &ver_key);
+ res = this->add_from_object(relobj, name, name_key, ver, ver_key,
+ def, *psym, st_shndx, is_ordinary,
+ orig_st_shndx);
- res = this->add_from_object(relobj, name, name_key, ver, ver_key,
- def, *psym, st_shndx, is_ordinary,
- orig_st_shndx);
- }
+ if (local)
+ this->force_local(res);
(*sympointers)[i] = res;
}
// If the caller didn't give us a version, see if we get one from
// the version script.
+ std::string v;
if (*pversion == NULL)
{
- const std::string& v(this->version_script_.get_symbol_version(*pname));
- if (!v.empty())
- *pversion = v.c_str();
+ if (this->version_script_.get_symbol_version(*pname, &v))
+ {
+ if (!v.empty())
+ *pversion = v.c_str();
+ }
}
if (only_if_ref)
ver_test_9.o: ver_test_9.cc
$(CXXCOMPILE) -c -fpic -o $@ $<
+check_SCRIPTS += ver_test_10.sh
+check_DATA += ver_test_10.syms
+ver_test_10.syms: ver_test_10.so
+ $(TEST_READELF) -s $< >$@ 2>/dev/null
+ver_test_10.so: gcctestdir/ld ver_test_2.o ver_test_10.script
+ $(CXXLINK) -Bgcctestdir/ -shared -Wl,--version-script,$(srcdir)/ver_test_10.script ver_test_2.o
+
check_PROGRAMS += protected_1
protected_1_SOURCES = \
protected_main_1.cc protected_main_2.cc protected_main_3.cc
@GCC_TRUE@@NATIVE_LINKER_TRUE@am__append_14 = debug_msg.sh \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ undef_symbol.sh ver_test_2.sh \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ ver_test_4.sh ver_test_5.sh \
-@GCC_TRUE@@NATIVE_LINKER_TRUE@ ver_test_7.sh \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@ ver_test_7.sh ver_test_10.sh \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ ver_matching_test.sh \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ script_test_3.sh \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ script_test_4.sh
@GCC_TRUE@@NATIVE_LINKER_TRUE@ debug_msg_ndebug.err \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ undef_symbol.err ver_test_2.syms \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ ver_test_4.syms ver_test_5.syms \
-@GCC_TRUE@@NATIVE_LINKER_TRUE@ ver_test_7.syms \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@ ver_test_7.syms ver_test_10.syms \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ ver_matching_test.stdout \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ script_test_3.stdout \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ script_test_4.stdout
@GCC_TRUE@@NATIVE_LINKER_TRUE@ $(CXXLINK) -Bgcctestdir/ -shared ver_test_9.o ver_test_5.so ver_test_4.so
@GCC_TRUE@@NATIVE_LINKER_TRUE@ver_test_9.o: ver_test_9.cc
@GCC_TRUE@@NATIVE_LINKER_TRUE@ $(CXXCOMPILE) -c -fpic -o $@ $<
+@GCC_TRUE@@NATIVE_LINKER_TRUE@ver_test_10.syms: ver_test_10.so
+@GCC_TRUE@@NATIVE_LINKER_TRUE@ $(TEST_READELF) -s $< >$@ 2>/dev/null
+@GCC_TRUE@@NATIVE_LINKER_TRUE@ver_test_10.so: gcctestdir/ld ver_test_2.o ver_test_10.script
+@GCC_TRUE@@NATIVE_LINKER_TRUE@ $(CXXLINK) -Bgcctestdir/ -shared -Wl,--version-script,$(srcdir)/ver_test_10.script ver_test_2.o
@GCC_TRUE@@NATIVE_LINKER_TRUE@protected_1.so: gcctestdir/ld protected_1_pic.o protected_2_pic.o protected_3_pic.o
@GCC_TRUE@@NATIVE_LINKER_TRUE@ $(CXXLINK) -Bgcctestdir/ -shared protected_1_pic.o protected_2_pic.o protected_3_pic.o
--- /dev/null
+## ver_test_10.script -- a test case for gold
+
+## Copyright 2008 Free Software Foundation, Inc.
+## Written by Ian Lance Taylor <iant@google.com>.
+
+## This file is part of gold.
+
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; either version 3 of the License, or
+## (at your option) any later version.
+
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+## GNU General Public License for more details.
+
+## You should have received a copy of the GNU General Public License
+## along with this program; if not, write to the Free Software
+## Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+## MA 02110-1301, USA.
+
+# Test having a version script with no version.
+
+{
+ global:
+ t3_2;
+ local:
+ *;
+};
--- /dev/null
+#!/bin/sh
+
+# ver_test_10.sh -- test global/local symbols
+
+# Copyright 2008 Free Software Foundation, Inc.
+# Written by Ian Lance Taylor <iant@google.com>.
+
+# This file is part of gold.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+# MA 02110-1301, USA.
+
+# This file goes with ver_test_4.script and ver_test_5.script. The
+# symbol t2_2 is not defined when ver_test_5.script is used.
+
+check()
+{
+ if ! grep -q "$2" "$1"
+ then
+ echo "Did not find expected symbol in $1:"
+ echo " $2"
+ echo ""
+ echo "Actual output below:"
+ cat "$1"
+ exit 1
+ fi
+}
+
+check ver_test_10.syms "GLOBAL.*t3_2"
+check ver_test_10.syms "LOCAL.*t4_2"
+
+exit 0
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