Use MACRO_AT_func in entry-values.exp

MACRO_AT_func can be used in gdb.trace/entry-values.exp to correctly
get function's address in generated debug info.  As a result, the test
is more friendly to clang.  Currently, there are some fails in
entry-values.exp when the test is compiled by clang.  With this patch
applied, all fails go away.

gdb/testsuite:

2014-11-22  Yao Qi  <yao@codesourcery.com>

	* gdb.trace/entry-values.c: Remove asms.
	(foo): Add foo_label.
	(bar): Add bar_label.
	* gdb.trace/entry-values.exp: Remove code computing  foo's
	length and bar's length.
	(Dwarf::assemble): Invoke function_range for bar and use
	MACRO_AT_func for foo.

3 files changed, 25 insertions, 78 deletions

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 7b490ee..6bbd72b 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,5 +1,15 @@
 2014-11-22  Yao Qi  <yao@codesourcery.com>
 
+	* gdb.trace/entry-values.c: Remove asms.
+	(foo): Add foo_label.
+	(bar): Add bar_label.
+	* gdb.trace/entry-values.exp: Remove code computing  foo's
+	length and bar's length.
+	(Dwarf::assemble): Invoke function_range for bar and use
+	MACRO_AT_func for foo.
+
+2014-11-22  Yao Qi  <yao@codesourcery.com>
+
 	* gdb.dwarf2/dw2-compdir-oldgcc.S: Define label .Lgcc42_procstart
 	and .Lgcc43_procstart.  Use .Lgcc42_procstart instead of gcc42.
 	Use .Lgcc43_procstart instead of gcc43.
diff --git a/gdb/testsuite/gdb.trace/entry-values.c b/gdb/testsuite/gdb.trace/entry-values.c
index 11bb739..c0d561a 100644
--- a/gdb/testsuite/gdb.trace/entry-values.c
+++ b/gdb/testsuite/gdb.trace/entry-values.c
@@ -15,23 +15,19 @@
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
-asm (".section	\".text\"");
-asm (".balign 8");
-asm ("foo_start: .globl foo_start");
-
 int
 foo (int i, int j)
 {
+  asm ("foo_label: .globl foo_label");
   return 0;
 }
 
-asm ("bar_start: .globl bar_start");
-
 int
 bar (int i)
 {
   int j = 2;
 
+  asm ("bar_label: .globl bar_label");
   return foo (i, j);
 }
 
diff --git a/gdb/testsuite/gdb.trace/entry-values.exp b/gdb/testsuite/gdb.trace/entry-values.exp
index 4838004..1b4d5cd 100644
--- a/gdb/testsuite/gdb.trace/entry-values.exp
+++ b/gdb/testsuite/gdb.trace/entry-values.exp
@@ -35,44 +35,6 @@ gdb_start
 gdb_reinitialize_dir $srcdir/$subdir
 gdb_load ${binfile}1.o
 
-set foo_length ""
-
-# Calculate the offset of the last instruction from the beginning.
-set test "disassemble foo"
-gdb_test_multiple $test $test {
-    -re ".*$hex <\\+($decimal)>:\[^\r\n\]+\r\nEnd of assembler dump\.\r\n$gdb_prompt $" {
-	set foo_length $expect_out(1,string)
-	pass $test
-    }
-    -re ".*$gdb_prompt $" {
-	fail $test
-	# Bail out here, because we can't do the following tests if
-	# $foo_length is unknown.
-	return -1
-    }
-}
-
-# Calculate the size of the last instruction.  Single instruction
-# shouldn't be longer than 10 bytes.
-
-set test "disassemble foo+$foo_length,+10"
-gdb_test_multiple $test $test {
-    -re ".*($hex) <foo\\+$foo_length>:\[^\r\n\]+\r\n\[ \]+($hex).*\.\r\n$gdb_prompt $" {
-	set start $expect_out(1,string)
-	set end $expect_out(2,string)
-
-	set foo_length [expr $foo_length + $end - $start]
-	pass $test
-    }
-    -re ".*$gdb_prompt $" {
-	fail $test
-	# Bail out here, because we can't do the following tests if
-	# $foo_length is unknown.
-	return -1
-    }
-}
-
-set bar_length ""
 set bar_call_foo ""
 
 if { [istarget "arm*-*-*"] || [istarget "aarch64*-*-*"] } {
@@ -85,23 +47,18 @@ if { [istarget "arm*-*-*"] || [istarget "aarch64*-*-*"] } {
     set call_insn "call"
 }
 
-# Calculate the offset of the last instruction from the beginning.
+# Calculate the offset of the instruction bar calls foo.
 set test "disassemble bar"
 gdb_test_multiple $test $test {
-    -re ".*$hex <\\+$decimal>:\[ \t\]+$call_insn\[^\r\n\]+\r\n\[ \]+$hex <\\+($decimal)>:" {
+    -re ".*$hex <\\+$decimal>:\[ \t\]+$call_insn\[^\r\n\]+\r\n\[ \]+$hex <\\+($decimal)>:.*$gdb_prompt $" {
 	set bar_call_foo $expect_out(1,string)
-	exp_continue
-    }
-    -re ".*$hex <\\+($decimal)>:\[^\r\n\]+\r\nEnd of assembler dump\.\r\n$gdb_prompt $" {
-	set bar_length $expect_out(1,string)
-	pass $test
     }
     -re ".*$gdb_prompt $" {
 	fail $test
     }
 }
 
-if { [string equal $bar_call_foo ""] || [string equal $bar_length ""] } {
+if { [string equal $bar_call_foo ""] } {
     fail "Find the call or branch instruction offset in bar"
     # The following test makes no sense if the offset is unknown.  We need
     # to update the pattern above to match call or branch instruction for
@@ -109,32 +66,18 @@ if { [string equal $bar_call_foo ""] || [string equal $bar_length ""] } {
     return -1
 }
 
-# Calculate the size of the last instruction.
-
-set test "disassemble bar+$bar_length,+10"
-gdb_test_multiple $test $test {
-    -re ".*($hex) <bar\\+$bar_length>:\[^\r\n\]+\r\n\[ \]+($hex).*\.\r\n$gdb_prompt $" {
-	set start $expect_out(1,string)
-	set end $expect_out(2,string)
-
-	set bar_length [expr $bar_length + $end - $start]
-	pass $test
-    }
-    -re ".*$gdb_prompt $" {
-	fail $test
-	# Bail out here, because we can't do the following tests if
-	# $bar_length is unknown.
-	return -1
-    }
-}
-
 gdb_exit
 
 # Make some DWARF for the test.
 set asm_file [standard_output_file $srcfile2]
 Dwarf::assemble $asm_file {
     declare_labels int_label foo_label
-    global foo_length bar_length bar_call_foo
+    global bar_call_foo
+    global srcdir subdir srcfile
+
+    set bar_result [function_range bar ${srcdir}/${subdir}/${srcfile}]
+    set bar_start [lindex $bar_result 0]
+    set bar_length [lindex $bar_result 1]
 
     cu {} {
 	compile_unit {{language @DW_LANG_C}} {
@@ -145,10 +88,8 @@ Dwarf::assemble $asm_file {
 	    }
 
 	    foo_label: subprogram {
-		{name foo}
 		{decl_file 1}
-		{low_pc foo_start addr}
-		{high_pc "foo_start + $foo_length" addr}
+		{MACRO_AT_func { foo ${srcdir}/${subdir}/${srcfile} }}
 	    } {
 		formal_parameter {
 		    {type :$int_label}
@@ -165,8 +106,8 @@ Dwarf::assemble $asm_file {
 	    subprogram {
 		{name bar}
 		{decl_file 1}
-		{low_pc bar_start addr}
-		{high_pc "bar_start + $bar_length" addr}
+		{low_pc $bar_start addr}
+		{high_pc "$bar_start + $bar_length" addr}
 		{GNU_all_call_sites 1}
 	    } {
 		formal_parameter {
@@ -175,7 +116,7 @@ Dwarf::assemble $asm_file {
 		}
 
 		GNU_call_site {
-		    {low_pc "bar_start + $bar_call_foo" addr}
+		    {low_pc "$bar_start + $bar_call_foo" addr}
 		    {abstract_origin :$foo_label}
 		} {
 		    # Faked entry values are reference to variables 'global1'