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140 lines
4.0 KiB
Plaintext
140 lines
4.0 KiB
Plaintext
# Copyright 2004-2016 Free Software Foundation, Inc.
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#
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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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#
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# This file is part of the gdb testsuite.
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# Test handling of nullified instructions for the pa target.
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switch -glob -- [istarget] {
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"hppa-*-*" {
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set testfile "pa-nullify"
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}
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"hppa64-*-*" {
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set testfile "pa64-nullify"
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}
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"*" {
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verbose "Skipping hppa nullification tests."
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return
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}
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}
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set srcfile ${testfile}.s
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set binfile ${objdir}/${subdir}/${testfile}
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set gcorefile ${objdir}/${subdir}/${testfile}.gcore
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if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {}] != "" } {
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unsupported "Testcase compile failed."
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return -1
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}
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gdb_exit
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gdb_start
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gdb_reinitialize_dir $srcdir/$subdir
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gdb_load ${binfile}
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# In the first test, we do a "step" on a function whose last instruction
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# contains a branch-with-nullify. The instruction in the delay slot belongs
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# to the next function. We verify that when we step off the first function
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# that we end up back at the caller and not at the second instruction.
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gdb_breakpoint foo
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gdb_test "run" "Breakpoint 1, .* in foo.*" "Breakpoint at foo"
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set test "stepi till main"
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gdb_test_multiple "stepi" "${test}" {
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-re ".*in foo.*$gdb_prompt $" {
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send_gdb "stepi\n"
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exp_continue -continue_timer
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}
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-re ".*in bar.*$gdb_prompt $" {
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fail $test
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}
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-re ".*in main.*$gdb_prompt $" {
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pass $test
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}
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}
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# In the second test, we verify that we can get a proper backtrace
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# even when we are in a nullified instruction that belongs to the next function.
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# We also verify that when stepping over a branch-with-nullify insn that we
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# stay on the same insn for two steps.
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proc get_addr_of_sym { sym } {
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set addr 0
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global gdb_prompt
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global hex
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set test "get address of $sym"
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gdb_test_multiple "print $sym" $test {
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-re ".*($hex) <$sym>.*$gdb_prompt $" {
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set addr $expect_out(1,string)
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pass $test
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}
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}
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return $addr
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}
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if { ! [ runto_main ] } then { gdb_suppress_tests; }
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set foo [get_addr_of_sym "foo"]
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set bar [get_addr_of_sym "bar"]
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set foo_last "(bar - 4)"
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gdb_breakpoint "*$foo_last"
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gdb_test "continue" "Breakpoint \[0-9\]*,.* in foo.*"
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gdb_test "backtrace" "in foo.*in main.*" "Backtrace from last insn in foo"
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gdb_test "stepi" "in foo.*" "stepi to nullified instruction stays in foo"
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gdb_test "backtrace" "in foo.*in main.*" "Backtrace from nullified insn"
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gdb_test "stepi" "in main.*" "stepi to main"
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# In the third test, we verify that backtraces from nullified instructions
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# work even in coredumps
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proc gen_core { test } {
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global gcorefile
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set gcore_works [gdb_gcore_cmd $gcorefile "$test: gcore"]
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return $gcore_works
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}
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proc test_core_bt { test } {
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global gcorefile
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gdb_test "core $gcorefile" "Core was generated by.*" \
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"$test: load core file" "A program is being debugged already.*" "y"
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gdb_test "backtrace" ".*in foo.*in main.*" "$test: backtrace in gcore"
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}
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set test "core at last insn in foo"
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if { ! [ runto_main ] } then { gdb_suppress_tests; }
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gdb_breakpoint "*$foo_last"
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gdb_test "continue" "Breakpoint \[0-9\]*,.* in foo.*" "$test: continue to breakpoint"
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if [gen_core $test] {
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test_core_bt $test
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}
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set test "core at nullified insn"
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if { ! [ runto_main ] } then { gdb_suppress_tests; }
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gdb_breakpoint "*$foo_last"
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gdb_test "continue" "Breakpoint \[0-9\]*,.* in foo.*" "$test: continue to breakpoint"
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gdb_test "stepi" ".*in foo.*" "$test: step to nullified instruction"
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if [gen_core $test] {
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test_core_bt $test
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}
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