[3/6] Get start and end address of main in dwz.exp
Commit Message
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:
2014-10-24 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.
---
gdb/testsuite/gdb.dwarf2/dwz.exp | 60 ++--------------------------------------
gdb/testsuite/gdb.dwarf2/main.c | 1 +
2 files changed, 4 insertions(+), 57 deletions(-)
Comments
Yao Qi writes:
> 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:
>
> 2014-10-24 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.
LGTM
@@ -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
}
@@ -20,5 +20,6 @@
int
main()
{
+ asm ("main_label: .globl main_label");
return 0;
}