binutils-gdb/gdb/testsuite/gdb.trace/entry-values.exp

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# Copyright 2013 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/>.
load_lib dwarf.exp
# This test can only be run on targets which support DWARF-2 and use gas.
if {![dwarf2_support]} {
return 0
}
standard_testfile .c entry-values-dw.S
if {[gdb_compile ${srcdir}/${subdir}/${srcfile} ${binfile}1.o \
object {nodebug}] != ""} {
return -1
}
# Start GDB and load object file, compute the function length and
# the offset of branch instruction in function. They are needed
# in the Dwarf Assembler below.
gdb_exit
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 ""
# Calculate the offset of the last instruction from the beginning.
set test "disassemble bar"
gdb_test_multiple $test $test {
-re ".*$hex <\\+$decimal>:\[ \t\]+call\[^\r\n\]+\r\n\[ \]+$hex <\\+($decimal)>:" {
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 $bar_length ""] } {
fail "Find the call or branch instruction offset in bar"
# The following test makes no sense if the offset is unknown. We need
# to update the pattern above to match call or branch instruction for
# the target architecture.
return -1
}
# Calculate the size of the last instruction.
set test "disassemble bar+$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
cu {} {
compile_unit {{language @DW_LANG_C}} {
int_label: base_type {
{name int}
{encoding @DW_ATE_signed}
{byte_size 4 DW_FORM_sdata}
}
foo_label: subprogram {
{name foo}
{decl_file 1}
{low_pc foo addr}
{high_pc "foo + $foo_length" addr}
} {
formal_parameter {
{type :$int_label}
{name i}
{location {DW_OP_reg0} SPECIAL_expr}
}
formal_parameter {
{type :$int_label}
{name j}
{location {DW_OP_reg1} SPECIAL_expr}
}
}
subprogram {
{name bar}
{decl_file 1}
{low_pc bar addr}
{high_pc "bar + $bar_length" addr}
{GNU_all_call_sites 1}
} {
formal_parameter {
{type :$int_label}
{name i}
}
GNU_call_site {
{low_pc "bar + $bar_call_foo" addr}
{abstract_origin :$foo_label}
} {
# Faked entry values are reference to variables 'global1'
# and 'global2' and faked locations are register 0 and
# register 1.
GNU_call_site_parameter {
{location {DW_OP_reg0} SPECIAL_expr}
{GNU_call_site_value {
addr global1
deref_size 4
} SPECIAL_expr}
}
GNU_call_site_parameter {
{location {DW_OP_reg1} SPECIAL_expr}
{GNU_call_site_value {
addr global2
deref_size 4
} SPECIAL_expr}
}
}
}
}
}
}
if {[gdb_compile $asm_file ${binfile}2.o object {nodebug}] != ""} {
return -1
}
if {[gdb_compile [list ${binfile}1.o ${binfile}2.o] \
"${binfile}" executable {}] != ""} {
return -1
}
clean_restart ${testfile}
if ![runto_main] {
fail "Can't run to main"
return -1
}
gdb_breakpoint "foo"
gdb_continue_to_breakpoint "foo"
gdb_test_no_output "set print entry-values both"
gdb_test_sequence "bt" "bt (1)" {
"\[\r\n\]#0 .* foo \\(i=[-]?[0-9]+, i@entry=2, j=[-]?[0-9]+, j@entry=3\\)"
"\[\r\n\]#1 .* bar \\(i=<optimized out>, i@entry=<optimized out>\\)"
"\[\r\n\]#2 .* main \\(\\)"
}
# Update global variables 'global1' and 'global2' and test that the
# entry values are updated too.
gdb_test_no_output "set var global1=10"
gdb_test_no_output "set var global2=11"
gdb_test_sequence "bt" "bt (2)" {
"\[\r\n\]#0 .* foo \\(i=[-]?[0-9]+, i@entry=10, j=[-]?[0-9]+, j@entry=11\\)"
"\[\r\n\]#1 .* bar \\(i=<optimized out>, i@entry=<optimized out>\\)"
"\[\r\n\]#2 .* main \\(\\)"
}