-# Copyright (C) 1992 Free Software Foundation, Inc.
+# Copyright 1992, 1994, 1995, 1996, 1997, 1999, 2000, 2007, 2008
+# 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 2 of the License, or
+# 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, write to the Free Software
-# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
# Please email any bugs, comments, and/or additions to this file to:
# bug-gdb@prep.ai.mit.edu
set prms_id 0
set bug_id 0
-set binfile "recurse"
-set srcfile $binfile.c
-
-if ![file exists $objdir/$subdir/$binfile] then {
- perror "$objdir/$subdir/$binfile does not exist."
- return 0
+set testfile "recurse"
+set srcfile ${testfile}.c
+set binfile ${objdir}/${subdir}/${testfile}
+if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
+ untested recurse.exp
+ return -1
}
-
# Start with a fresh gdb.
gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
-gdb_load $objdir/$subdir/$binfile
-
-# For now we only run this on PAs running BSD.
-if {[file exists $objdir/$subdir/$binfile] && [istarget "hppa*-*-bsd*"]} then {
+gdb_load ${binfile}
- # Preserve the old timeout, and set a new one that should be
- # sufficient to avoid timing out during this test.
+proc recurse_tests {} {
- set timeoutsave $timeout
- set timeout 60
+ # Disable hardware watchpoints if necessary.
+ if [target_info exists gdb,no_hardware_watchpoints] {
+ gdb_test "set can-use-hw-watchpoints 0" "" ""
+ }
if [runto recurse] then {
- gdb_test "watch b" ".*\[Ww\]atchpoint \[0-9]*: b"
+ # First we need to step over the assignment of b, so it has a known
+ # value.
+ gdb_test "next" "if \\(a == 1\\)" "next over b = 0 in first instance"
+ gdb_test "watch b" ".*\[Ww\]atchpoint \[0-9]*: b" \
+ "set first instance watchpoint"
# Continue until initial set of b.
- send "cont\n"
- expect {
- -re "Continuing.*Watchpoint.*, b.*Old value = 0.*New value = 10.*$prompt $" { pass "watchpoint hit, first time" }
- -re ".*$prompt $" { fail "missed first watchpoint" ; return }
- timeout { fail "missed first watchpoint (timeout)" ; return }
+ if [gdb_test "continue" \
+ "Continuing.*\[Ww\]atchpoint.*: b.*Old value = 0.*New value = 10.*" \
+ "continue to first instance watchpoint, first time"] then {
+ gdb_suppress_tests;
}
# Continue inward for a few iterations
- gdb_test "continue" "Breakpoint.* recurse \[(\]+a=9\[)\]+"
- gdb_test "continue" "Breakpoint.* recurse \[(\]+a=8\[)\]+"
- gdb_test "continue" "Breakpoint.* recurse \[(\]+a=7\[)\]+"
- gdb_test "continue" "Breakpoint.* recurse \[(\]+a=6\[)\]+"
- gdb_test "continue" "Breakpoint.* recurse \[(\]+a=5\[)\]+"
+ gdb_test "continue" "Breakpoint.* recurse \\(a=9\\).*" \
+ "continue to recurse (a = 9)"
+ gdb_test "continue" "Breakpoint.* recurse \\(a=8\\).*" \
+ "continue to recurse (a = 8)"
+ gdb_test "continue" "Breakpoint.* recurse \\(a=7\\).*" \
+ "continue to recurse (a = 7)"
+ gdb_test "continue" "Breakpoint.* recurse \\(a=6\\).*" \
+ "continue to recurse (a = 6)"
+ gdb_test "continue" "Breakpoint.* recurse \\(a=5\\).*" \
+ "continue to recurse (a = 5)"
# Put a watchpoint on another instance of b
- gdb_test "watch b" ".*\[Ww\]atchpoint \[0-9]*: b"
+ # First we need to step over the assignment of b, so it has a known
+ # value.
+ gdb_test "next" "if \\(a == 1\\)" "next over b = 0 in second instance"
+ gdb_test "watch b" ".*\[Ww\]atchpoint \[0-9]*: b" \
+ "set second instance watchpoint"
# Continue until initial set of b (second instance).
- send "cont\n"
- expect {
- -re "Continuing.*Watchpoint.*, b.*Old value = 0.*New value = 5.*$prompt $" { pass "watchpoint hit (second instance)" }
- -re ".*$prompt $" {
- fail "missed watchpoint (second instance)"
- return
- }
- timeout {
- fail "missed watchpoint (second instance) (timeout)"
- return
- }
+ if [gdb_test "continue" \
+ "Continuing.*\[Ww\]atchpoint.*: b.*Old value = 0.*New value = 5.*"\
+ "continue to second instance watchpoint, first time"] then {
+ gdb_suppress_tests;
}
# Continue inward for a few iterations
- gdb_test "continue" "Breakpoint.* recurse \[(\]+a=4\[)\]+"
- gdb_test "continue" "Breakpoint.* recurse \[(\]+a=3\[)\]+"
- gdb_test "continue" "Breakpoint.* recurse \[(\]+a=2\[)\]+"
- gdb_test "continue" "Breakpoint.* recurse \[(\]+a=1\[)\]+"
+ gdb_test "continue" "Breakpoint.* recurse \\(a=4\\).*" \
+ "continue to recurse (a = 4)"
+ gdb_test "continue" "Breakpoint.* recurse \\(a=3\\).*" \
+ "continue to recurse (a = 3)"
+ gdb_test "continue" "Breakpoint.* recurse \\(a=2\\).*" \
+ "continue to recurse (a = 2)"
+ gdb_test "continue" "Breakpoint.* recurse \\(a=1\\).*" \
+ "continue to recurse (a = 1)"
# Continue until second set of b (second instance).
- send "cont\n"
- expect {
- -re "Continuing.*Watchpoint.*, b.*Old value = 5.*New value = 120.*return.*$prompt $" { pass "watchpoint hit, second time (second instance)" }
- -re ".*$prompt $" {
- fail "missed watchpoint, second time (second instance)"
- return
- }
- timeout {
- fail "missed watchpoint, second time (second instance)(timeout)"
- return
- }
+ if [gdb_test "continue" \
+ "Continuing.*\[Ww\]atchpoint.*: b.*Old value = 5.*New value = 120.*return.*" \
+ "continue to second instance watchpoint, second time"] then {
+ gdb_suppress_tests;
}
# Continue again. We should have a watchpoint go out of scope now
- send "cont\n"
- expect {
- -re "Continuing.*Watchpoint.*deleted.*recurse \[(\]+a=6\[)\]+ .*$prompt $" {pass "watchpoint deleted when leaving scope (second instance)" }
- -re ".*prompt $" {
- fail "watchpoint not deleted when leaving scope (second instance)"
- return
- }
- timeout {
- fail "watchpoint not deleted when leaving scope (second instance) (timeout)"
- return
- }
+ if [gdb_test "continue" \
+ "Continuing.*\[Ww\]atchpoint.*deleted.*recurse \\(a=6\\) .*" \
+ "second instance watchpoint deleted when leaving scope"] then {
+ gdb_suppress_tests;
}
# Continue until second set of b (first instance).
- send "cont\n"
- expect {
- -re "Continuing.*Watchpoint.*b.*Old value = 10.*New value = 3628800.*return.*$prompt $" { pass "watchpoint hit, second time" }
- -re ".*$prompt $" {
- fail "missed watchpoint, second time)"
- return
- }
- timeout {
- fail "missed watchpoint, second time (timeout)"
- return
- }
+ # 24320 is allowed as the final value for b as that's the value
+ # b would have on systems with 16bit integers.
+ #
+ # We could fix the test program to deal with this too.
+ if [gdb_test "continue" \
+ "Continuing.*\[Ww\]atchpoint.*b.*Old value = 10.*New value = \(3628800|24320\).*return.*" \
+ "continue to first instance watchpoint, second time"] then {
+ gdb_suppress_tests
}
- # Continue again. We should have a watchpoint go out of scope now
- send "cont\n"
- expect {
- -re "Continuing.*Watchpoint.*deleted.*main \[(\]+\[)\]+ .*$prompt $" {pass "watchpoint deleted when leaving scope" }
- -re ".*prompt $" {
- fail "watchpoint not deleted when leaving scope"
- return
- }
- timeout {
- fail "watchpoint not deleted when leaving scope (timeout)"
- return
- }
+ # Continue again. We should have a watchpoint go out of scope now.
+ #
+ # The former version expected the test to return to main().
+ # Now it expects the test to return to main or to stop in the
+ # function's epilogue.
+ #
+ # The problem is that gdb needs to (but doesn't) understand
+ # function epilogues in the same way as for prologues.
+ #
+ # If there is no hardware watchpoint (such as a x86 debug register),
+ # then watchpoints are done "the hard way" by single-stepping the
+ # target until the value of the watched variable changes. If you
+ # are single-stepping, you will eventually step into an epilogue.
+ # When you do that, the "top" stack frame may become partially
+ # deconstructed (as when you pop the frame pointer, for instance),
+ # and from that point on, GDB can no longer make sense of the stack.
+ #
+ # A test which stops in the epilogue is trying to determine when GDB
+ # leaves the stack frame in which the watchpoint was created. It does
+ # this basically by watching for the frame pointer to change. When
+ # the frame pointer changes, the test expects to be back in main, but
+ # instead it is still in the epilogue of the callee.
+ if [gdb_test "continue" \
+ "Continuing.*\[Ww\]atchpoint.*deleted.*\(main \\(\\) \|21.*\}\).*" \
+ "first instance watchpoint deleted when leaving scope"] then {
+ gdb_suppress_tests;
}
}
-
- # Restore the preserved old timeout value.
- set timeout $timeoutsave
+ gdb_stop_suppressing_tests;
}
-if [istarget "a29k-*-udi"] then {
- # FIXME: If PR 2415 is fixed, this is not needed.
- gdb_target_udi
-}
+# Preserve the old timeout, and set a new one that should be
+# sufficient to avoid timing out during this test.
+set oldtimeout $timeout
+set timeout [expr "$timeout + 60"]
+verbose "Timeout is now $timeout seconds" 2
+
+recurse_tests
+
+# Restore the preserved old timeout value.
+set timeout $oldtimeout
+verbose "Timeout is now $timeout seconds" 2
+
projects / deliverable / binutils-gdb.git / blobdiff