gdb/testsuite/

	* gdb.base/code_elim.exp: New file.
	* gdb.base/code_elim1.c: New file.
	* gdb.base/code_elim2.c: New file.

4 files changed, 251 insertions, 0 deletions

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 0543f80..090c6c2 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2010-07-26  Jerome Guitton  <guitton@adacore.com>
+
+	* gdb.base/code_elim.exp: New file.
+	* gdb.base/code_elim1.c: New file.
+	* gdb.base/code_elim2.c: New file.
+
 2010-07-21  Pedro Alves  <pedro@codesourcery.com>
 
 	PR symtab/11827
diff --git a/gdb/testsuite/gdb.base/code_elim.exp b/gdb/testsuite/gdb.base/code_elim.exp
new file mode 100644
index 0000000..cc625e0
--- /dev/null
+++ b/gdb/testsuite/gdb.base/code_elim.exp
@@ -0,0 +1,173 @@
+# Copyright 2002, 2003, 2005, 2007, 2008, 2009, 2010
+# Free Software Foundation, Inc.
+
+# 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, see <http://www.gnu.org/licenses/>.  */
+
+# code_elim.exp -- tests that GDB can handle executables where some data/code
+#                  has been eliminated by the linker.
+
+if $tracelevel then {
+    strace $tracelevel
+}
+
+set testfile1 code_elim1
+set testfile2 code_elim2
+set srcfile1 ${testfile1}.c
+set srcfile2 ${testfile2}.c
+set binfile1 ${objdir}/${subdir}/${testfile1}
+set binfile2 ${objdir}/${subdir}/${testfile2}
+set opts [list debug]
+lappend opts "additional_flags=-ffunction-sections"
+lappend opts "additional_flags=-fdata-sections"
+lappend opts "additional_flags=-Wl,-gc-sections"
+lappend opts "additional_flags=-Wl,-e,main"
+
+remote_exec build "rm -f ${binfile1}"
+remote_exec build "rm -f ${binfile2}"
+
+if { [gdb_compile "${srcdir}/${subdir}/${srcfile1}" "${binfile1}" executable $opts] != "" } {
+     untested code_elim.exp
+     return -1
+}
+
+if { [gdb_compile "${srcdir}/${subdir}/${srcfile2}" "${binfile2}" executable $opts] != "" } {
+     untested code_elim.exp
+     return -1
+}
+
+proc get_var_address { var } {
+    global gdb_prompt hex
+
+    # Match output like:
+    # $1 = (int *) 0x0
+    # $5 = (int (*)()) 0
+    # $6 = (int (*)()) 0x24 <function_bar>
+
+    gdb_test_multiple "print &${var}" "get address of ${var}" {
+	-re "\\\$\[0-9\]+ = \\(.*\\) (0|$hex)( <${var}>)?\[\r\n\]+${gdb_prompt} $" {
+	    pass "get address of ${var}"
+	    if { $expect_out(1,string) == "0" } {
+		return "0x0"
+	    } else {
+		return $expect_out(1,string)
+	    }
+	}
+    }
+    return ""
+}
+
+proc not_null_var_address { var } {
+
+    # Same as get_var_address, expect that it reports a failure if a null
+    # address is returned by gdb.
+
+    set address [get_var_address $var]
+    regexp "0x\[0-9a-fA-F\]+" $address address
+    if { "$address" == "0x0" } {
+	fail "$var has null address"
+    }
+}
+
+proc test_eliminated_var { var } {
+    global gdb_prompt hex
+
+    # Match output 'No symbol "${var}" in current context'
+
+    gdb_test_multiple "print &${var}" "test eliminated var ${var}" {
+	-re "No symbol \"${var}\" in current context\\.\[\r\n\]+${gdb_prompt} $" {
+	    pass "test eliminated var ${var}"
+	}
+	-re "\\\$\[0-9\]+ = \\(.*\\) (0|$hex)( <${var}>)?\[\r\n\]+${gdb_prompt} $" {
+	    fail "test eliminated var ${var}"
+	}
+    }
+}
+
+# Check that the code and data eliminated in binfile1 are not included
+# into partial symtab... and that non-eliminated symbols are still there.
+
+gdb_exit
+gdb_start
+
+gdb_test "add-symbol-file ${binfile1} 0x100000" \
+	"Reading symbols from .*${testfile1}\\.\\.\\.done\\.(|\r\nUsing host libthread_db library .*libthread_db.so.*\\.)" \
+	"add-symbol-file ${testfile1} 0x100000" \
+	"add symbol table from file \".*${testfile1}\" at\[ \t\r\n\]+\.text_addr = 0x100000\[\r\n\]+\\(y or n\\) " \
+	"y"
+
+test_eliminated_var my_global_symbol
+test_eliminated_var my_static_symbol
+test_eliminated_var my_global_func
+not_null_var_address main
+
+# Same thing for symtabs
+
+gdb_exit
+global GDBFLAGS
+set saved_gdbflags $GDBFLAGS
+set GDBFLAGS "$GDBFLAGS --readnow $binfile1"
+gdb_start
+set GDBFLAGS $saved_gdbflags
+
+test_eliminated_var my_global_symbol
+test_eliminated_var my_static_symbol
+test_eliminated_var my_global_func
+not_null_var_address main
+
+# binfile2 contains the symbols that have been eliminated in binfile1. Check
+# the eliminated symbols does not hide these valid ones.
+
+gdb_exit
+gdb_start
+
+gdb_test "add-symbol-file ${binfile1} 0x100000" \
+	"Reading symbols from .*${testfile1}\\.\\.\\.done\\." \
+	"add-symbol-file ${testfile1} 0x100000" \
+	"add symbol table from file \".*${testfile1}\" at\[ \t\r\n\]+\.text_addr = 0x100000\[\r\n\]+\\(y or n\\) " \
+	"y"
+
+gdb_test "add-symbol-file ${binfile2} 0x200000" \
+	"Reading symbols from .*${testfile2}\\.\\.\\.done\\." \
+	"add-symbol-file ${testfile2} 0x200000" \
+	"add symbol table from file \".*${testfile2}\" at\[ \t\r\n\]+\.text_addr = 0x200000\[\r\n\]+\\(y or n\\) " \
+	"y"
+
+not_null_var_address my_global_symbol
+not_null_var_address my_static_symbol
+not_null_var_address my_global_func
+not_null_var_address main
+
+# Same thing, but loading binfile2 before binfile1.
+
+gdb_exit
+gdb_start
+
+gdb_test "add-symbol-file ${binfile2} 0x200000" \
+	"Reading symbols from .*${testfile2}\\.\\.\\.done\\." \
+	"add-symbol-file ${testfile2} 0x200000" \
+	"add symbol table from file \".*${testfile2}\" at\[ \t\r\n\]+\.text_addr = 0x200000\[\r\n\]+\\(y or n\\) " \
+	"y"
+
+gdb_test "add-symbol-file ${binfile1} 0x100000" \
+	"Reading symbols from .*${testfile1}\\.\\.\\.done\\." \
+	"add-symbol-file ${testfile1} 0x100000" \
+	"add symbol table from file \".*${testfile1}\" at\[ \t\r\n\]+\.text_addr = 0x100000\[\r\n\]+\\(y or n\\) " \
+	"y"
+
+not_null_var_address my_global_symbol
+not_null_var_address my_static_symbol
+not_null_var_address my_global_func
+not_null_var_address main
+
+
diff --git a/gdb/testsuite/gdb.base/code_elim1.c b/gdb/testsuite/gdb.base/code_elim1.c
new file mode 100644
index 0000000..6aef483
--- /dev/null
+++ b/gdb/testsuite/gdb.base/code_elim1.c
@@ -0,0 +1,37 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2010
+   Free Software Foundation, Inc.
+
+   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, see <http://www.gnu.org/licenses/>.  */
+
+int my_global_symbol = 42;
+
+static int my_static_symbol;
+
+int
+main ()
+{
+  int v_in_main;
+
+  return v_in_main;
+}
+
+int
+my_global_func ()
+{
+  int v_in_global_func;
+
+  return v_in_global_func;
+}
diff --git a/gdb/testsuite/gdb.base/code_elim2.c b/gdb/testsuite/gdb.base/code_elim2.c
new file mode 100644
index 0000000..61a4556
--- /dev/null
+++ b/gdb/testsuite/gdb.base/code_elim2.c
@@ -0,0 +1,35 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2010
+   Free Software Foundation, Inc.
+
+   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, see <http://www.gnu.org/licenses/>.  */
+
+int my_global_symbol = 42;
+
+static int my_static_symbol;
+
+int
+main ()
+{
+  return my_global_func ();
+}
+
+int
+my_global_func ()
+{
+  my_static_symbol = my_global_symbol;
+  my_global_symbol = my_static_symbol + my_global_symbol;
+  return my_global_symbol;
+}