[4/7] Step over fork/vfork syscall insn in gdbserver
Commit Message
Luis Machado <lgustavo@codesourcery.com> writes:
>> + # Delete breakpoint syscall insns to avoid interference to other syscalls.
>> + delete_breakpoints
>
> "... interference with ..."
Oops, I thought I fixed that to address your comment to v1. Sorry about that.
@@ -168,5 +168,62 @@ proc disp_step_cross_syscall { syscall } {
}
}
+# Set a breakpoint with a condition that evals false on syscall
+# instruction. In fact, it tests GDBserver steps over syscall
+# instruction.
+
+proc break_cond_on_syscall { syscall } {
+ with_test_prefix "break cond on target : $syscall" {
+ set testfile "disp-step-$syscall"
+
+ set ret [setup $syscall]
+
+ set syscall_insn_addr [lindex $ret 0]
+ set syscall_insn_next_addr [lindex $ret 1]
+ if { $syscall_insn_addr == -1 } {
+ return -1
+ }
+
+ gdb_test "continue" "Continuing\\..*Breakpoint \[0-9\]+, (.* in |__libc_|)$syscall \\(\\).*" \
+ "continue to $syscall"
+ # Delete breakpoint syscall insns to avoid interference with other syscalls.
+ delete_breakpoints
+
+
+ # Create a breakpoint with a condition that evals false.
+ gdb_test "break \*$syscall_insn_addr if main == 0" \
+ "Breakpoint \[0-9\]* at .*"
+
+ gdb_test "break marker" "Breakpoint.*at.* file .*${testfile}.c, line.*"
+ gdb_test "continue" "Continuing\\..*Breakpoint \[0-9\]+, marker \\(\\) at.*" \
+ "continue to marker ($syscall)"
+ }
+}
+
disp_step_cross_syscall "fork"
disp_step_cross_syscall "vfork"
+
+set testfile "disp-step-fork"
+clean_restart $testfile
+if { ![runto main] } then {
+ fail "run to main"
+ return -1
+}
+
+set cond_bp_target 1
+
+set test "set breakpoint condition-evaluation target"
+gdb_test_multiple $test $test {
+ -re "warning: Target does not support breakpoint condition evaluation.\r\nUsing host evaluation mode instead.\r\n$gdb_prompt $" {
+ # Target doesn't support breakpoint condition
+ # evaluation on its side.
+ set cond_bp_target 0
+ }
+ -re "^$test\r\n$gdb_prompt $" {
+ }
+}
+
+if { $cond_bp_target } {
+ break_cond_on_syscall "fork"
+ break_cond_on_syscall "vfork"
+}