-# Copyright (C) 1992, 1996 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 srcfile ${testfile}.c
set binfile ${objdir}/${subdir}/${testfile}
if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
- perror "Couldn't compile ${srcfile}"
- return -1
+ untested recurse.exp
+ return -1
}
# Start with a fresh gdb.
proc recurse_tests {} {
+ # 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 {
# First we need to step over the assignment of b, so it has a known
# value.
if [gdb_test "continue" \
"Continuing.*\[Ww\]atchpoint.*: b.*Old value = 0.*New value = 10.*" \
"continue to first instance watchpoint, first time"] then {
- return
+ gdb_suppress_tests;
}
# Continue inward for a few iterations
if [gdb_test "continue" \
"Continuing.*\[Ww\]atchpoint.*: b.*Old value = 0.*New value = 5.*"\
"continue to second instance watchpoint, first time"] then {
- return
+ gdb_suppress_tests;
}
# Continue inward for a few iterations
if [gdb_test "continue" \
"Continuing.*\[Ww\]atchpoint.*: b.*Old value = 5.*New value = 120.*return.*" \
"continue to second instance watchpoint, second time"] then {
- return
+ gdb_suppress_tests;
}
# Continue again. We should have a watchpoint go out of scope now
if [gdb_test "continue" \
"Continuing.*\[Ww\]atchpoint.*deleted.*recurse \\(a=6\\) .*" \
"second instance watchpoint deleted when leaving scope"] then {
- return
+ gdb_suppress_tests;
}
# Continue until second set of b (first instance).
+ # 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.*return.*" \
+ "Continuing.*\[Ww\]atchpoint.*b.*Old value = 10.*New value = \(3628800|24320\).*return.*" \
"continue to first instance watchpoint, second time"] then {
- return
+ gdb_suppress_tests
}
- # Continue again. We should have a watchpoint go out of scope now
+ # 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 \\(\\) .*" \
+ "Continuing.*\[Ww\]atchpoint.*deleted.*\(main \\(\\) \|21.*\}\).*" \
"first instance watchpoint deleted when leaving scope"] then {
- return
+ gdb_suppress_tests;
}
}
+ gdb_stop_suppressing_tests;
}
-# Only enabled for some targets merely because it has not been tested
-# elsewhere.
-if {[istarget "sparc*-*-sunos4*"] || [istarget "hppa*-*-bsd*"] || [istarget "sparclet-*-*"] || [istarget "m32r-*-elf"] || [istarget "mn10200-*-*"]} then {
+# 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
- # 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
- recurse_tests
+# Restore the preserved old timeout value.
+set timeout $oldtimeout
+verbose "Timeout is now $timeout seconds" 2
- # Restore the preserved old timeout value.
- set timeout $oldtimeout
- verbose "Timeout is now $timeout seconds" 2
-}
projects / deliverable / binutils-gdb.git / blobdiff