| # Copyright 2004-2021 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/>. |
| # |
| # This file is part of the gdb testsuite. |
| |
| |
| # Test handling of nullified instructions for the pa target. |
| |
| switch -glob -- [istarget] { |
| "hppa-*-*" { |
| set testfile "pa-nullify" |
| } |
| "hppa64-*-*" { |
| set testfile "pa64-nullify" |
| } |
| "*" { |
| verbose "Skipping hppa nullification tests." |
| return |
| } |
| } |
| |
| set srcfile ${testfile}.s |
| set binfile ${objdir}/${subdir}/${testfile} |
| set gcorefile ${objdir}/${subdir}/${testfile}.gcore |
| |
| if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {}] != "" } { |
| unsupported "failed to compile" |
| return -1 |
| } |
| |
| gdb_exit |
| gdb_start |
| gdb_reinitialize_dir $srcdir/$subdir |
| gdb_load ${binfile} |
| |
| # In the first test, we do a "step" on a function whose last instruction |
| # contains a branch-with-nullify. The instruction in the delay slot belongs |
| # to the next function. We verify that when we step off the first function |
| # that we end up back at the caller and not at the second instruction. |
| |
| gdb_breakpoint foo |
| gdb_test "run" "Breakpoint 1, .* in foo.*" "breakpoint at foo" |
| |
| set test "stepi till main" |
| gdb_test_multiple "stepi" "${test}" { |
| -re ".*in foo.*$gdb_prompt $" { |
| send_gdb "stepi\n" |
| exp_continue -continue_timer |
| } |
| -re ".*in bar.*$gdb_prompt $" { |
| fail $test |
| } |
| -re ".*in main.*$gdb_prompt $" { |
| pass $test |
| } |
| } |
| |
| # In the second test, we verify that we can get a proper backtrace |
| # even when we are in a nullified instruction that belongs to the next function. |
| # We also verify that when stepping over a branch-with-nullify insn that we |
| # stay on the same insn for two steps. |
| |
| proc get_addr_of_sym { sym } { |
| set addr 0 |
| global gdb_prompt |
| global hex |
| |
| set test "get address of $sym" |
| gdb_test_multiple "print $sym" $test { |
| -re ".*($hex) <$sym>.*$gdb_prompt $" { |
| set addr $expect_out(1,string) |
| pass $test |
| } |
| } |
| |
| return $addr |
| } |
| |
| if ![runto_main] then { |
| return 0 |
| } |
| |
| set foo [get_addr_of_sym "foo"] |
| set bar [get_addr_of_sym "bar"] |
| set foo_last "(bar - 4)" |
| |
| gdb_breakpoint "*$foo_last" |
| |
| gdb_test "continue" "Breakpoint \[0-9\]*,.* in foo.*" |
| gdb_test "backtrace" "in foo.*in main.*" "backtrace from last insn in foo" |
| gdb_test "stepi" "in foo.*" "stepi to nullified instruction stays in foo" |
| gdb_test "backtrace" "in foo.*in main.*" "backtrace from nullified insn" |
| gdb_test "stepi" "in main.*" "stepi to main" |
| |
| # In the third test, we verify that backtraces from nullified instructions |
| # work even in coredumps |
| |
| proc gen_core { test } { |
| global gcorefile |
| |
| set gcore_works [gdb_gcore_cmd $gcorefile "$test: gcore"] |
| return $gcore_works |
| } |
| |
| proc test_core_bt { test } { |
| global gcorefile |
| |
| gdb_test "core $gcorefile" "Core was generated by.*" \ |
| "$test: load core file" "A program is being debugged already.*" "y" |
| |
| gdb_test "backtrace" ".*in foo.*in main.*" "$test: backtrace in gcore" |
| } |
| |
| set test "core at last insn in foo" |
| if ![runto_main] then { |
| return 0 |
| } |
| gdb_breakpoint "*$foo_last" |
| gdb_test "continue" "Breakpoint \[0-9\]*,.* in foo.*" "$test: continue to breakpoint" |
| if [gen_core $test] { |
| test_core_bt $test |
| } |
| |
| set test "core at nullified insn" |
| if ![runto_main] then { |
| return 0 |
| } |
| gdb_breakpoint "*$foo_last" |
| gdb_test "continue" "Breakpoint \[0-9\]*,.* in foo.*" "$test: continue to breakpoint" |
| gdb_test "stepi" ".*in foo.*" "$test: step to nullified instruction" |
| if [gen_core $test] { |
| test_core_bt $test |
| } |