# Copyright 2004-2016 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 . # # 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 $addr } if { ! [ runto_main ] } then { gdb_suppress_tests; } set foo [get_addr_of_sym "foo"] set bar [get_addr_of_sym "bar"] set foo_last "(bar - 4)" gdb_breakpoint "*$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.*" "$test: backtrace in gcore" } set test "core at last insn in foo" if { ! [ runto_main ] } then { gdb_suppress_tests; } gdb_breakpoint "*$foo_last" gdb_test "continue" "Breakpoint \[0-9\]*,.* in foo.*" "$test: continue to breakpoint" if [gen_core $test] { test_core_bt $test } set test "core at nullified insn" if { ! [ runto_main ] } then { gdb_suppress_tests; } gdb_breakpoint "*$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 }