From: Ian Lance Taylor <ian@airs.com>
Date: Thu, 27 Mar 2008 19:57:41 +0000 (+0000)
Subject: 	* common.cc (Sort_commons::operator): Correct sorting algorithm.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=49bdd526aba04608f9658d5c36923e10a2021df3;p=binutils-gdb.git

	* common.cc (Sort_commons::operator): Correct sorting algorithm.
	* testsuite/common_test_1.c: New file.
	* testsuite/Makefile.am (check_PROGRAMS): Add common_test_1.
	(common_test_1_SOURCES): New variable.
	(common_test_1_DEPENDENCIES): New variable.
	(common_test_1_LDFLAGS): New variable.
---

diff --git a/gold/ChangeLog b/gold/ChangeLog
index 098b7e3594f..492e5c59c47 100644
--- a/gold/ChangeLog
+++ b/gold/ChangeLog
@@ -1,5 +1,12 @@
 2008-03-27  Ian Lance Taylor  <iant@google.com>
 
+	* common.cc (Sort_commons::operator): Correct sorting algorithm.
+	* testsuite/common_test_1.c: New file.
+	* testsuite/Makefile.am (check_PROGRAMS): Add common_test_1.
+	(common_test_1_SOURCES): New variable.
+	(common_test_1_DEPENDENCIES): New variable.
+	(common_test_1_LDFLAGS): New variable.
+
 	* symtab.cc (Symbol_table::add_from_object): Handle saw_undefined_
 	and commons_ correctly when NAME/VERSION does not override
 	NAME/NULL.
diff --git a/gold/common.cc b/gold/common.cc
index f92637eb106..54b686dec8c 100644
--- a/gold/common.cc
+++ b/gold/common.cc
@@ -93,19 +93,21 @@ Sort_commons<size>::operator()(const Symbol* pa, const Symbol* pb) const
   const Sized_symbol<size>* psa = symtab->get_sized_symbol<size>(pa);
   const Sized_symbol<size>* psb = symtab->get_sized_symbol<size>(pb);
 
+  // Sort by largest size first.
   typename Sized_symbol<size>::Size_type sa = psa->symsize();
   typename Sized_symbol<size>::Size_type sb = psb->symsize();
   if (sa < sb)
     return false;
-  else if (sb > sa)
+  else if (sb < sa)
     return true;
 
-  // When the symbols are the same size, we sort them by alignment.
+  // When the symbols are the same size, we sort them by alignment,
+  // largest alignment first.
   typename Sized_symbol<size>::Value_type va = psa->value();
   typename Sized_symbol<size>::Value_type vb = psb->value();
   if (va < vb)
     return false;
-  else if (vb > va)
+  else if (vb < va)
     return true;
 
   // Otherwise we stabilize the sort by sorting by name.
diff --git a/gold/testsuite/Makefile.am b/gold/testsuite/Makefile.am
index 4d0f9dc827a..0016f719d72 100644
--- a/gold/testsuite/Makefile.am
+++ b/gold/testsuite/Makefile.am
@@ -277,6 +277,10 @@ two_file_mixed_2_shared_test_LDADD = two_file_shared_mixed_1.so two_file_shared_
 
 endif FN_PTRS_IN_SO_WITHOUT_PIC
 
+check_PROGRAMS += common_test_1
+common_test_1_SOURCES = common_test_1.c
+common_test_1_DEPENDENCIES = gcctestdir/ld
+common_test_1_LDFLAGS = -Bgcctestdir/
 
 check_PROGRAMS += exception_test
 check_PROGRAMS += exception_static_test
diff --git a/gold/testsuite/Makefile.in b/gold/testsuite/Makefile.in
index f9c37f3977d..bc4f73ab58f 100644
--- a/gold/testsuite/Makefile.in
+++ b/gold/testsuite/Makefile.in
@@ -102,7 +102,8 @@ check_PROGRAMS = object_unittest$(EXEEXT) binary_unittest$(EXEEXT) \
 @FN_PTRS_IN_SO_WITHOUT_PIC_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	two_file_separate_shared_21_nonpic_test \
 @FN_PTRS_IN_SO_WITHOUT_PIC_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	two_file_mixed_shared_test \
 @FN_PTRS_IN_SO_WITHOUT_PIC_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	two_file_mixed_2_shared_test
-@GCC_TRUE@@NATIVE_LINKER_TRUE@am__append_3 = exception_test \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@am__append_3 = common_test_1 \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	exception_test \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	exception_static_test \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	exception_shared_1_test \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	exception_shared_2_test \
@@ -110,6 +111,13 @@ check_PROGRAMS = object_unittest$(EXEEXT) binary_unittest$(EXEEXT) \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	exception_separate_shared_12_test \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	exception_separate_shared_21_test \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	weak_test
+@GCC_FALSE@common_test_1_DEPENDENCIES = libgoldtest.a ../libgold.a \
+@GCC_FALSE@	../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
+@GCC_FALSE@	$(am__DEPENDENCIES_1)
+@NATIVE_LINKER_FALSE@common_test_1_DEPENDENCIES = libgoldtest.a \
+@NATIVE_LINKER_FALSE@	../libgold.a ../../libiberty/libiberty.a \
+@NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1) \
+@NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1)
 @GCC_FALSE@exception_test_DEPENDENCIES = libgoldtest.a ../libgold.a \
 @GCC_FALSE@	../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
 @GCC_FALSE@	$(am__DEPENDENCIES_1)
@@ -264,7 +272,8 @@ libgoldtest_a_OBJECTS = $(am_libgoldtest_a_OBJECTS)
 @FN_PTRS_IN_SO_WITHOUT_PIC_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	two_file_separate_shared_21_nonpic_test$(EXEEXT) \
 @FN_PTRS_IN_SO_WITHOUT_PIC_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	two_file_mixed_shared_test$(EXEEXT) \
 @FN_PTRS_IN_SO_WITHOUT_PIC_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@	two_file_mixed_2_shared_test$(EXEEXT)
-@GCC_TRUE@@NATIVE_LINKER_TRUE@am__EXEEXT_3 = exception_test$(EXEEXT) \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@am__EXEEXT_3 = common_test_1$(EXEEXT) \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	exception_test$(EXEEXT) \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	exception_static_test$(EXEEXT) \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	exception_shared_1_test$(EXEEXT) \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	exception_shared_2_test$(EXEEXT) \
@@ -327,6 +336,11 @@ binary_unittest_LDADD = $(LDADD)
 binary_unittest_DEPENDENCIES = libgoldtest.a ../libgold.a \
 	../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
 	$(am__DEPENDENCIES_1)
+am__common_test_1_SOURCES_DIST = common_test_1.c
+@GCC_TRUE@@NATIVE_LINKER_TRUE@am_common_test_1_OBJECTS =  \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	common_test_1.$(OBJEXT)
+common_test_1_OBJECTS = $(am_common_test_1_OBJECTS)
+common_test_1_LDADD = $(LDADD)
 am__constructor_static_test_SOURCES_DIST = constructor_test.cc
 @GCC_TRUE@@NATIVE_LINKER_TRUE@am__objects_1 =  \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	constructor_test.$(OBJEXT)
@@ -614,7 +628,8 @@ CXXLINK = $(CXXLD) $(AM_CXXFLAGS) $(CXXFLAGS) $(AM_LDFLAGS) $(LDFLAGS) \
 SOURCES = $(libgoldtest_a_SOURCES) basic_pic_test.c \
 	basic_static_pic_test.c basic_static_test.c basic_test.c \
 	$(binary_test_SOURCES) $(binary_unittest_SOURCES) \
-	$(constructor_static_test_SOURCES) $(constructor_test_SOURCES) \
+	$(common_test_1_SOURCES) $(constructor_static_test_SOURCES) \
+	$(constructor_test_SOURCES) \
 	$(exception_same_shared_test_SOURCES) \
 	$(exception_separate_shared_12_test_SOURCES) \
 	$(exception_separate_shared_21_test_SOURCES) \
@@ -651,6 +666,7 @@ SOURCES = $(libgoldtest_a_SOURCES) basic_pic_test.c \
 DIST_SOURCES = $(libgoldtest_a_SOURCES) basic_pic_test.c \
 	basic_static_pic_test.c basic_static_test.c basic_test.c \
 	$(am__binary_test_SOURCES_DIST) $(binary_unittest_SOURCES) \
+	$(am__common_test_1_SOURCES_DIST) \
 	$(am__constructor_static_test_SOURCES_DIST) \
 	$(am__constructor_test_SOURCES_DIST) \
 	$(am__exception_same_shared_test_SOURCES_DIST) \
@@ -985,6 +1001,9 @@ binary_unittest_SOURCES = binary_unittest.cc
 @FN_PTRS_IN_SO_WITHOUT_PIC_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@two_file_mixed_2_shared_test_DEPENDENCIES = gcctestdir/ld two_file_shared_mixed_1.so two_file_shared_2.so
 @FN_PTRS_IN_SO_WITHOUT_PIC_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@two_file_mixed_2_shared_test_LDFLAGS = -Bgcctestdir/ -Wl,-R,.
 @FN_PTRS_IN_SO_WITHOUT_PIC_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@two_file_mixed_2_shared_test_LDADD = two_file_shared_mixed_1.so two_file_shared_2.so
+@GCC_TRUE@@NATIVE_LINKER_TRUE@common_test_1_SOURCES = common_test_1.c
+@GCC_TRUE@@NATIVE_LINKER_TRUE@common_test_1_DEPENDENCIES = gcctestdir/ld
+@GCC_TRUE@@NATIVE_LINKER_TRUE@common_test_1_LDFLAGS = -Bgcctestdir/
 @GCC_TRUE@@NATIVE_LINKER_TRUE@exception_test_SOURCES = \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	exception_test_main.cc \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	exception_test_1.cc \
@@ -1152,6 +1171,9 @@ binary_test$(EXEEXT): $(binary_test_OBJECTS) $(binary_test_DEPENDENCIES)
 binary_unittest$(EXEEXT): $(binary_unittest_OBJECTS) $(binary_unittest_DEPENDENCIES) 
 	@rm -f binary_unittest$(EXEEXT)
 	$(CXXLINK) $(binary_unittest_LDFLAGS) $(binary_unittest_OBJECTS) $(binary_unittest_LDADD) $(LIBS)
+common_test_1$(EXEEXT): $(common_test_1_OBJECTS) $(common_test_1_DEPENDENCIES) 
+	@rm -f common_test_1$(EXEEXT)
+	$(LINK) $(common_test_1_LDFLAGS) $(common_test_1_OBJECTS) $(common_test_1_LDADD) $(LIBS)
 constructor_static_test$(EXEEXT): $(constructor_static_test_OBJECTS) $(constructor_static_test_DEPENDENCIES) 
 	@rm -f constructor_static_test$(EXEEXT)
 	$(CXXLINK) $(constructor_static_test_LDFLAGS) $(constructor_static_test_OBJECTS) $(constructor_static_test_LDADD) $(LIBS)
@@ -1318,6 +1340,7 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/basic_test.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/binary_test.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/binary_unittest.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/common_test_1.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/constructor_test.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/exception_test_1.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/exception_test_2.Po@am__quote@
diff --git a/gold/testsuite/common_test_1.c b/gold/testsuite/common_test_1.c
new file mode 100644
index 00000000000..f5a28f4d319
--- /dev/null
+++ b/gold/testsuite/common_test_1.c
@@ -0,0 +1,75 @@
+/* common_test_1.c -- test common symbol sorting
+
+   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 is a test of a common symbol in the main program and a
+   versioned symbol in a shared library.  The common symbol in the
+   main program should override the shared library symbol.  */
+
+#include <assert.h>
+
+/* Common symbols should be sorted by size, largest first, and then by
+   alignment, largest first.  We mix up the names, because gas seems
+   to sort common symbols roughly by name.  */
+
+int c9[90];
+int c8[80];
+int c7[70];
+int c6[60];
+int c5[10];
+int c4[20];
+int c3[30];
+int c2[40];
+int c1[50];
+
+int a1 __attribute__ ((aligned (1 << 9)));
+int a2 __attribute__ ((aligned (1 << 8)));
+int a3 __attribute__ ((aligned (1 << 7)));
+int a4 __attribute__ ((aligned (1 << 6)));
+int a5 __attribute__ ((aligned (1 << 1)));
+int a6 __attribute__ ((aligned (1 << 2)));
+int a7 __attribute__ ((aligned (1 << 3)));
+int a8 __attribute__ ((aligned (1 << 4)));
+int a9 __attribute__ ((aligned (1 << 5)));
+
+int
+main (int argc __attribute__ ((unused)), char** argv __attribute__ ((unused)))
+{
+  assert (c5 > c4);
+  assert (c4 > c3);
+  assert (c3 > c2);
+  assert (c2 > c1);
+  assert (c1 > c6);
+  assert (c6 > c7);
+  assert (c7 > c8);
+  assert (c8 > c9);
+
+  assert (&a1 < &a2);
+  assert (&a2 < &a3);
+  assert (&a3 < &a4);
+  assert (&a4 < &a9);
+  assert (&a9 < &a8);
+  assert (&a8 < &a7);
+  assert (&a7 < &a6);
+  assert (&a6 < &a5);
+
+  return 0;
+}