--- /dev/null
+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright 2011 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/>. */
+
+#include <stdlib.h>
+
+static void
+marker () {}
+
+int
+main (void)
+{
+ int pid;
+
+ pid = fork ();
+ if (pid == 0) /* child */
+ {
+ exit (0); /* at exit */
+ }
+ else
+ {
+ }
+
+ pid = fork ();
+ if (pid == 0) /* child */
+ {
+ exit (0); /* at exit */
+ }
+ else
+ {
+ }
+
+ pid = fork ();
+ if (pid == 0) /* child */
+ {
+ exit (0); /* at exit */
+ }
+ else
+ {
+ }
+
+ marker ();
+
+}
--- /dev/null
+# This testcase is part of GDB, the GNU debugger.
+
+# Copyright 2011 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/>.
+
+if { ![support_displaced_stepping] } {
+ unsupported "displaced stepping"
+ return -1
+}
+
+set syscall_insn ""
+
+# Define the syscall instruction for each target.
+
+if { [istarget "i\[34567\]86-*-linux*"] || [istarget "x86_64-*-linux*"] } {
+ set syscall_insn "(int|syscall|sysenter)"
+} else {
+ return -1
+}
+
+proc disp_step_cross_syscall { syscall } {
+ global syscall_insn
+ global gdb_prompt
+ global pf_prefix
+
+ set testfile "disp-step-$syscall"
+
+ if [prepare_for_testing ${testfile}.exp ${testfile} ${testfile}.c {debug}] {
+ untested ${testfile}.exp
+ return -1
+ }
+
+ if { ![runto main] } then {
+ fail "run to main ($syscall)"
+ return
+ }
+
+ set old_pf_prefix $pf_prefix
+ lappend pf_prefix "$syscall:"
+
+ # Delete the breakpoint on main.
+ gdb_test_no_output "delete break 1"
+
+ gdb_test "break marker" "Breakpoint.*at.* file .*${testfile}.c, line.*"
+ gdb_test_no_output "set displaced-stepping off"
+
+ set syscall_bp 0
+ gdb_test_multiple "break $syscall" "break $syscall" {
+ -re "Breakpoint (\[0-9\]*) at .*$gdb_prompt $" {
+ set syscall_bp $expect_out(1,string)
+ pass "break $syscall"
+ }
+ }
+
+ gdb_test "continue" "Continuing\\..*Breakpoint \[0-9\]+, .* in $syscall ().*" \
+ "continue to $syscall (1st time)"
+ # Hit the breakpoint on $syscall for the first time. In this time, we will let PLT
+ # resolution done, and the number single steps we will do later will be
+ # reduced.
+
+ gdb_test "continue" "Continuing\\..*Breakpoint \[0-9\]+, .* in $syscall ().*" \
+ "continue to $syscall (2nd time)"
+ # Hit the breakpoint on $syscall for the second time. In this time, the address
+ # of syscall insn and next insn of syscall are recorded.
+
+ gdb_test "display/i \$pc" ".*"
+
+
+ # Single step until we see sysall insn or we reach the upper bound of loop
+ # iterations.
+ set see_syscall_insn 0
+
+ for {set i 0} {$i < 1000 && $see_syscall_insn == 0} {incr i} {
+ send_gdb "stepi\n"
+ gdb_expect {
+ -re ".*$syscall_insn.*$gdb_prompt $" {
+ set see_syscall_insn 1
+ }
+ -re ".*$gdb_prompt $" {}
+ }
+ }
+
+ if {$see_syscall_insn == 0} then {
+ fail "find syscall insn in $syscall"
+ set pf_prefix $old_pf_prefix
+ return -1
+ }
+
+ set syscall_insn_addr [get_hexadecimal_valueof "\$pc" "0"]
+ gdb_test "stepi" ".*" "stepi $syscall insn"
+ set syscall_insn_next_addr [get_hexadecimal_valueof "\$pc" "0"]
+
+ gdb_test "continue" "Continuing\\..*Breakpoint \[0-9\]+, .* in $syscall ().*" \
+ "continue to $syscall (3rd time)"
+
+ # Hit the breakpoint on $syscall for the third time. In this time, we'll set
+ # breakpoint on the syscall insn we recorded previously, and single step over it.
+
+ set syscall_insn_bp 0
+ gdb_test_multiple "break \*$syscall_insn_addr" "break on syscall insn" {
+ -re "Breakpoint (\[0-9\]*) at .*$gdb_prompt $" {
+ set syscall_insn_bp $expect_out(1,string)
+ pass "break on syscall insns"
+ }
+ }
+ gdb_test_no_output "delete $syscall_bp" "delete break $syscall"
+
+ gdb_test "continue" "Continuing\\..*Breakpoint \[0-9\]+, .*" \
+ "continue to syscall insn $syscall"
+
+ gdb_test_no_output "set displaced-stepping on"
+
+ # Check the address of next instruction of syscall.
+ gdb_test "stepi" ".*$syscall_insn_next_addr.*" "single step over $syscall"
+
+ # Delete breakpoint syscall insns to avoid interference to other syscalls.
+ gdb_test_no_output "delete $syscall_insn_bp" "delete break $syscall insn"
+
+ gdb_test "continue" "Continuing\\..*Breakpoint \[0-9\]+, marker \\(\\) at.*" \
+ "continue to marker ($syscall)"
+
+ set pf_prefix $old_pf_prefix
+}
+
+disp_step_cross_syscall "fork"
+disp_step_cross_syscall "vfork"
projects / thirdparty / binutils-gdb.git / commitdiff
