20ec36d942
Fix results with system glibc debug info installed. * gdb.base/disp-step-syscall.exp (continue to $syscall (1st time)) (continue to $syscall (2nd time), continue to $syscall (3rd time)): Accept also __libc_ symbol prefix and no prefix.
138 lines
4.3 KiB
Text
138 lines
4.3 KiB
Text
# This testcase is part of GDB, the GNU debugger.
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# Copyright 2011 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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if { ![support_displaced_stepping] } {
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unsupported "displaced stepping"
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return -1
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}
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set syscall_insn ""
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# Define the syscall instruction for each target.
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if { [istarget "i\[34567\]86-*-linux*"] || [istarget "x86_64-*-linux*"] } {
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set syscall_insn "(int|syscall|sysenter)"
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} else {
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return -1
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}
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proc disp_step_cross_syscall { syscall } {
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global syscall_insn
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global gdb_prompt
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global pf_prefix
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set testfile "disp-step-$syscall"
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if [prepare_for_testing ${testfile}.exp ${testfile} ${testfile}.c {debug}] {
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untested ${testfile}.exp
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return -1
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}
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if { ![runto main] } then {
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fail "run to main ($syscall)"
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return
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}
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set old_pf_prefix $pf_prefix
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lappend pf_prefix "$syscall:"
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# Delete the breakpoint on main.
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gdb_test_no_output "delete break 1"
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gdb_test "break marker" "Breakpoint.*at.* file .*${testfile}.c, line.*"
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gdb_test_no_output "set displaced-stepping off"
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set syscall_bp 0
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gdb_test_multiple "break $syscall" "break $syscall" {
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-re "Breakpoint (\[0-9\]*) at .*$gdb_prompt $" {
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set syscall_bp $expect_out(1,string)
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pass "break $syscall"
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}
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}
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gdb_test "continue" "Continuing\\..*Breakpoint \[0-9\]+, (.* in |__libc_|)$syscall \\(\\).*" \
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"continue to $syscall (1st time)"
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# Hit the breakpoint on $syscall for the first time. In this time, we will let PLT
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# resolution done, and the number single steps we will do later will be
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# reduced.
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gdb_test "continue" "Continuing\\..*Breakpoint \[0-9\]+, (.* in |__libc_|)$syscall \\(\\).*" \
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"continue to $syscall (2nd time)"
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# Hit the breakpoint on $syscall for the second time. In this time, the address
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# of syscall insn and next insn of syscall are recorded.
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gdb_test "display/i \$pc" ".*"
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# Single step until we see sysall insn or we reach the upper bound of loop
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# iterations.
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set see_syscall_insn 0
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for {set i 0} {$i < 1000 && $see_syscall_insn == 0} {incr i} {
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send_gdb "stepi\n"
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gdb_expect {
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-re ".*$syscall_insn.*$gdb_prompt $" {
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set see_syscall_insn 1
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}
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-re ".*$gdb_prompt $" {}
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}
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}
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if {$see_syscall_insn == 0} then {
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fail "find syscall insn in $syscall"
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set pf_prefix $old_pf_prefix
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return -1
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}
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set syscall_insn_addr [get_hexadecimal_valueof "\$pc" "0"]
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gdb_test "stepi" ".*" "stepi $syscall insn"
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set syscall_insn_next_addr [get_hexadecimal_valueof "\$pc" "0"]
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gdb_test "continue" "Continuing\\..*Breakpoint \[0-9\]+, (.* in |__libc_|)$syscall \\(\\).*" \
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"continue to $syscall (3rd time)"
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# Hit the breakpoint on $syscall for the third time. In this time, we'll set
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# breakpoint on the syscall insn we recorded previously, and single step over it.
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set syscall_insn_bp 0
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gdb_test_multiple "break \*$syscall_insn_addr" "break on syscall insn" {
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-re "Breakpoint (\[0-9\]*) at .*$gdb_prompt $" {
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set syscall_insn_bp $expect_out(1,string)
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pass "break on syscall insns"
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}
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}
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gdb_test_no_output "delete $syscall_bp" "delete break $syscall"
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gdb_test "continue" "Continuing\\..*Breakpoint \[0-9\]+, .*" \
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"continue to syscall insn $syscall"
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gdb_test_no_output "set displaced-stepping on"
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# Check the address of next instruction of syscall.
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gdb_test "stepi" ".*$syscall_insn_next_addr.*" "single step over $syscall"
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# Delete breakpoint syscall insns to avoid interference to other syscalls.
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gdb_test_no_output "delete $syscall_insn_bp" "delete break $syscall insn"
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gdb_test "continue" "Continuing\\..*Breakpoint \[0-9\]+, marker \\(\\) at.*" \
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"continue to marker ($syscall)"
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set pf_prefix $old_pf_prefix
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}
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disp_step_cross_syscall "fork"
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disp_step_cross_syscall "vfork"
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