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Get start and end address of main in dwz.exp

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On arm-none-eabi target thumb mode, I see the following fail,

p the_int^M
$2 = 99^M
(gdb) FAIL: gdb.dwarf2/dwz.exp: p the_int

and on powerpc64 target, we even can't get function main from object
file,

disassemble main^M
No function contains specified address.^M
(gdb) FAIL: gdb.dwarf2/dwz.exp: disassemble main

This patch is to use MACRO_AT_func attribute to get the main's start
address and end address correctly, and also remove some code dwz.exp
getting main's length.  This patch fixes fails on both thumb mode and
powerpc64 target.

PASS: gdb.dwarf2/dwz.exp: p other_int
PASS: gdb.dwarf2/dwz.exp: p the_int

gdb/testsuite:

2014-11-14  Yao Qi  <yao@codesourcery.com>

	* gdb.dwarf2/dwz.exp: Remove the code to compile main.c to
	object and get function length.
	(Dwarf::assemble): Replace name, low_pc and high_pc attributes
	with MACRO_AT_func.
	(top-level): Replace gdb_compile and clean_restart with
	prepare_for_testing.
	* gdb.dwarf2/main.c (main): Add label main_label.
This commit is contained in:
Yao Qi 2014-11-14 08:53:08 +08:00
parent 876c4df947
commit 0f6e71e32f
3 changed files with 14 additions and 57 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
gdb/testsuite/ChangeLog
View File

@ -1,3 +1,13 @@
2014-11-14 Yao Qi <yao@codesourcery.com>
* gdb.dwarf2/dwz.exp: Remove the code to compile main.c to
object and get function length.
(Dwarf::assemble): Replace name, low_pc and high_pc attributes
with MACRO_AT_func.
(top-level): Replace gdb_compile and clean_restart with
prepare_for_testing.
* gdb.dwarf2/main.c (main): Add label main_label.
2014-11-14 Yao Qi <yao@codesourcery.com>
* lib/dwarf.exp (function_range): New procedure.

60
gdb/testsuite/gdb.dwarf2/dwz.exp
View File

@ -22,65 +22,18 @@ if {![dwarf2_support]} {
standard_testfile main.c dwz.S
if {[gdb_compile ${srcdir}/${subdir}/${srcfile} ${binfile}1.o \
object {nodebug}] != ""} {
return -1
}
# Start GDB and load object file, compute the function length which is
# needed in the Dwarf Assembler below.
clean_restart ${testfile}1.o
set main_length ""
set test "disassemble main"
gdb_test_multiple $test $test {
-re ".*$hex <\\+($decimal)>:\[^\r\n\]+\r\nEnd of assembler dump\.\r\n$gdb_prompt $" {
set main_length $expect_out(1,string)
pass $test
}
}
if { $main_length == "" } {
# Bail out here, because we can't do the following tests if
# $main_length is unknown.
return -1
}
# Compute the size of the last instruction.
set test "x/2i main+$main_length"
gdb_test_multiple $test $test {
-re ".*($hex) <main\\+$main_length>:\[^\r\n\]+\r\n\[ \]+($hex).*\.\r\n$gdb_prompt $" {
set start $expect_out(1,string)
set end $expect_out(2,string)
set main_length [expr $main_length + $end - $start]
pass $test
}
}
if { $main_length == "" } {
# Bail out here, because we can't do the following tests if
# $main_length is unknown.
return -1
}
gdb_exit
# Create the DWARF.
set asm_file [standard_output_file $srcfile2]
Dwarf::assemble $asm_file {
declare_labels partial_label int_label int_label2
global main_length
global srcdir subdir srcfile
extern main
cu {} {
partial_label: partial_unit {} {
subprogram {
{name main}
{low_pc main addr}
{high_pc "main + $main_length" addr}
{MACRO_AT_func { main ${srcdir}/${subdir}/${srcfile} }}
}
}
}
@ -128,17 +81,10 @@ Dwarf::assemble $asm_file {
}
}
if {[gdb_compile $asm_file ${binfile}2.o object {nodebug}] != ""} {
if [prepare_for_testing ${testfile}.exp $testfile "${asm_file} ${srcfile}" {}] {
return -1
}
if {[gdb_compile [list ${binfile}1.o ${binfile}2.o] \
"${binfile}" executable {}] != ""} {
return -1
}
clean_restart ${testfile}
if ![runto_main] {
return -1
}

1
gdb/testsuite/gdb.dwarf2/main.c
View File

@ -20,5 +20,6 @@
int
main()
{
asm ("main_label: .globl main_label");
return 0;
}