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4a94e36819
This commit brings all the changes made by running gdb/copyright.py as per GDB's Start of New Year Procedure. For the avoidance of doubt, all changes in this commits were performed by the script.
137 lines
5.3 KiB
Plaintext
137 lines
5.3 KiB
Plaintext
# Copyright 1992-2022 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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# This file was written by Jeff Law. (law@cs.utah.edu)
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standard_testfile
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if {[prepare_for_testing "failed to prepare" $testfile $srcfile debug]} {
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return -1
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}
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proc recurse_tests {} {
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# Disable hardware watchpoints if necessary.
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if [target_info exists gdb,no_hardware_watchpoints] {
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gdb_test_no_output "set can-use-hw-watchpoints 0" ""
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}
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if [runto recurse] then {
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# First we need to step over the assignment of b, so it has a known
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# value.
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gdb_test "next" "if \\(a == 1\\)" "next over b = 0 in first instance"
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gdb_test "watch b" ".*\[Ww\]atchpoint \[0-9]*: b" \
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"set first instance watchpoint"
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# Continue until initial set of b.
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gdb_test "continue" \
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"Continuing.*\[Ww\]atchpoint.*: b.*Old value = 0.*New value = 10.*" \
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"continue to first instance watchpoint, first time"
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# Continue inward for a few iterations
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gdb_test "continue" "Breakpoint.* recurse \\(a=9\\).*" \
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"continue to recurse (a = 9)"
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gdb_test "continue" "Breakpoint.* recurse \\(a=8\\).*" \
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"continue to recurse (a = 8)"
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gdb_test "continue" "Breakpoint.* recurse \\(a=7\\).*" \
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"continue to recurse (a = 7)"
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gdb_test "continue" "Breakpoint.* recurse \\(a=6\\).*" \
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"continue to recurse (a = 6)"
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gdb_test "continue" "Breakpoint.* recurse \\(a=5\\).*" \
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"continue to recurse (a = 5)"
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# Put a watchpoint on another instance of b
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# First we need to step over the assignment of b, so it has a known
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# value.
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gdb_test "next" "if \\(a == 1\\)" "next over b = 0 in second instance"
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gdb_test "watch b" ".*\[Ww\]atchpoint \[0-9]*: b" \
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"set second instance watchpoint"
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# Continue until initial set of b (second instance).
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gdb_test "continue" \
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"Continuing.*\[Ww\]atchpoint.*: b.*Old value = 0.*New value = 5.*"\
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"continue to second instance watchpoint, first time"
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# Continue inward for a few iterations
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gdb_test "continue" "Breakpoint.* recurse \\(a=4\\).*" \
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"continue to recurse (a = 4)"
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gdb_test "continue" "Breakpoint.* recurse \\(a=3\\).*" \
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"continue to recurse (a = 3)"
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gdb_test "continue" "Breakpoint.* recurse \\(a=2\\).*" \
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"continue to recurse (a = 2)"
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gdb_test "continue" "Breakpoint.* recurse \\(a=1\\).*" \
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"continue to recurse (a = 1)"
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# Continue until second set of b (second instance).
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gdb_test "continue" \
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"Continuing.*\[Ww\]atchpoint.*: b.*Old value = 5.*New value = 120.*return.*" \
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"continue to second instance watchpoint, second time"
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# Continue again. We should have a watchpoint go out of scope now
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gdb_test "continue" \
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"Continuing.*\[Ww\]atchpoint.*deleted.*recurse \\(a=6\\) .*" \
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"second instance watchpoint deleted when leaving scope"
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# Continue until second set of b (first instance).
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# 24320 is allowed as the final value for b as that's the value
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# b would have on systems with 16bit integers.
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#
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# We could fix the test program to deal with this too.
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gdb_test "continue" \
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"Continuing.*\[Ww\]atchpoint.*b.*Old value = 10.*New value = \(3628800|24320\).*return.*" \
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"continue to first instance watchpoint, second time"
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# Continue again. We should have a watchpoint go out of scope now.
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#
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# The former version expected the test to return to main().
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# Now it expects the test to return to main or to stop in the
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# function's epilogue.
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#
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# The problem is that gdb needs to (but doesn't) understand
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# function epilogues in the same way as for prologues.
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#
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# If there is no hardware watchpoint (such as a x86 debug register),
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# then watchpoints are done "the hard way" by single-stepping the
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# target until the value of the watched variable changes. If you
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# are single-stepping, you will eventually step into an epilogue.
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# When you do that, the "top" stack frame may become partially
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# deconstructed (as when you pop the frame pointer, for instance),
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# and from that point on, GDB can no longer make sense of the stack.
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#
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# A test which stops in the epilogue is trying to determine when GDB
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# leaves the stack frame in which the watchpoint was created. It does
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# this basically by watching for the frame pointer to change. When
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# the frame pointer changes, the test expects to be back in main, but
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# instead it is still in the epilogue of the callee.
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gdb_test "continue" \
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"Continuing.*\[Ww\]atchpoint.*deleted.*\(main \\(\\) \|21.*\}\).*" \
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"first instance watchpoint deleted when leaving scope"
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}
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}
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# Preserve the old timeout, and set a new one that should be
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# sufficient to avoid timing out during this test.
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set oldtimeout $timeout
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set timeout [expr "$timeout + 60"]
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verbose "Timeout is now $timeout seconds" 2
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recurse_tests
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# Restore the preserved old timeout value.
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set timeout $oldtimeout
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verbose "Timeout is now $timeout seconds" 2
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