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41bd68f52c
Currently, optimized out variables are not shown when doing "info locals". Some users found that confusing, thinking GDB forgot to print their variable. This patch adds them to the "info locals" output. I added a test in gdb.dwarf2 to test for that behavior. I think doing a synthetic DWARF test is the easiest way to have an optimized out local variable for sure. However, this change reveals what I think is a bug in GDB, see: http://lists.dwarfstd.org/pipermail/dwarf-discuss-dwarfstd.org/2017-September/004394.html This patch marks the tests in inline-locals.exp that start failing as KFAIL. I'd like to tackle this bug eventually, but I don't have the time right now. I think it's still better to show an extra erroneous entry than to not show the optimized out variables at all. I haven't created a bug in bugzilla yet, but if we agree it's indeed a bug, I'll create one and update the setup_kfail lines with the actual bug number before pushing. gdb/ChangeLog: * stack.c (iterate_over_block_locals): Add LOC_OPTIMIZED_OUT case in switch. gdb/testsuite/ChangeLog: * gdb.opt/inline-locals.exp: Mark tests as KFAIL. * gdb.dwarf2/info-locals-optimized-out.exp: New file. * gdb.dwarf2/info-locals-optimized-out.c: New file.
109 lines
3.6 KiB
Plaintext
109 lines
3.6 KiB
Plaintext
# Copyright 2008-2017 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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standard_testfile .c inline-markers.c
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if {[prepare_for_testing "failed to prepare" $testfile \
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[list $srcfile $srcfile2] {debug additional_flags=-Winline}]} {
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return -1
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}
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runto_main
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get_compiler_info
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get_debug_format
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if { [skip_inline_var_tests] } {
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untested inline-bt.exp
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return
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}
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set no_frames [skip_inline_frame_tests]
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set line1 [gdb_get_line_number "set breakpoint 1 here" ${srcfile2}]
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gdb_breakpoint $srcfile2:$line1
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gdb_test "continue" ".*set breakpoint 1 here.*" "continue to bar 1"
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gdb_test "continue" ".*set breakpoint 1 here.*" "continue to bar 2"
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if { ! $no_frames } {
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gdb_test "backtrace" "#0 bar.*#1 .*func1.*#2 .*main.*" \
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"backtrace from bar 2"
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gdb_test "up" "#1 .*func1 .* at .*" "up from bar 2"
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gdb_test "info frame" ".*inlined into frame.*" "func1 inlined 2"
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setup_kfail "gdb/xyz" *-*-*
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gdb_test "info locals" "array = {.*}" "info locals above bar 2"
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set msg "info args above bar 2"
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gdb_test_multiple "info args" $msg {
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-re "arg1 = $decimal\r\n$gdb_prompt $" {
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pass $msg
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}
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-re "arg1 = <optimized out>\r\n$gdb_prompt $" {
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# GCC 4.3 and later lose location information for arg1. GCC 4.2 is OK.
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if { [test_compiler_info "gcc-4-3-*"] || [test_compiler_info "gcc-4-4-*"]} {
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setup_xfail *-*-*
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}
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fail $msg
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}
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}
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} else {
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gdb_test "up" "#1 .*main .* at .*" "up from bar 2"
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gdb_test "info locals" ".*arg1 = 0.*" "info locals above bar 2"
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}
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# Make sure that locals on the stack are found. This is an array to
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# prevent it from living in a register.
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gdb_test "print array\[0\]" "\\\$$decimal = 0" "print local 2"
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if { ! $no_frames } {
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# Verify that we do not print out variables from the inlined
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# function's caller.
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gdb_test "print val" "No symbol \"val\" in current context\\." \
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"print out of scope local"
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}
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# Repeat the tests from a depth of two inlined functions, and with a
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# more interesting value in the local array.
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gdb_test "continue" ".*set breakpoint 1 here.*" "continue to bar 3"
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if { ! $no_frames } {
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gdb_test "backtrace" "#0 bar.*#1 .*func1.*#2 .*func2.*#3 .*main.*" \
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"backtrace from bar 3"
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gdb_test "up" "#1 .*func1 .* at .*" "up from bar 3"
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gdb_test "info frame" ".*inlined into frame.*" "func1 inlined 3"
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setup_kfail "gdb/xyz" *-*-*
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gdb_test "info locals" "array = {.*}" "info locals above bar 3"
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set msg "info args above bar 3"
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gdb_test_multiple "info args" $msg {
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-re "arg1 = $decimal\r\n$gdb_prompt $" {
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pass $msg
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}
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-re "arg1 = <optimized out>\r\n$gdb_prompt $" {
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# GCC 4.3 and later lose location information for arg1. GCC 4.2 is OK.
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if { [test_compiler_info "gcc-4-3-*"] || [test_compiler_info "gcc-4-4-*"]} {
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setup_xfail *-*-*
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}
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fail $msg
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}
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}
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} else {
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gdb_test "up" "#1 .*main .* at .*" "up from bar 3"
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gdb_test "info locals" ".*arg1 = 1.*" "info locals above bar (3a)"
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gdb_test "info locals" ".*arg2 = 184.*" "info locals above bar (3b)"
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}
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gdb_test "print array\[0\]" "\\\$$decimal = 184" "print local 3"
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