88 lines
2.6 KiB
Plaintext
88 lines
2.6 KiB
Plaintext
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# Copyright 2018 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 testcase is a regression test for a regression in the in-line
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# step-over machinery. If a resumption that starts a step-over
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# failed, a following resumption would make GDB hang forever:
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#
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# (gdb) b *0
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# Breakpoint 2 at 0x0
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# continue
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# Continuing.
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# Warning:
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# Cannot insert breakpoint 2.
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# Cannot access memory at address 0x0
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#
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# Command aborted.
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# delete breakpoints
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# Delete all breakpoints? (y or n) y
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# (gdb) b function
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# Breakpoint 3 at 0x40048b: file test.c, line 33.
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# continue
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# Continuing.
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# *GDB hangs forever*
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standard_testfile
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if {[build_executable "failed to prepare" $testfile $srcfile debug]} {
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return -1
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}
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# DISPLACED indicates whether to use displaced-stepping.
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proc do_test {displaced} {
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global gdb_prompt decimal
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global srcfile binfile
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clean_restart $binfile
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gdb_test_no_output "set displaced-stepping $displaced"
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if ![runto_main] {
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fail "run to main"
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return -1
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}
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# We rely on not being able to set a breakpoint at 0, as proxy for
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# any kind of breakpoint insertion failure. If we can examine
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# what's at memory address 0, it is possible that we could also
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# execute it.
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if [is_address_zero_readable] {
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untested "memory at address 0 is possibly executable"
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return
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}
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# Set a breakpoint that fails to insert.
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gdb_test "b *0" "Breakpoint $decimal at 0x0"
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gdb_test "continue" \
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"Command aborted\\." \
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"continue aborts"
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# Delete the "bad" breakpoint and try continuing again.
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delete_breakpoints
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gdb_test "b function" "Breakpoint $decimal .*$srcfile.*"
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gdb_test "continue" \
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"Breakpoint $decimal, function \\(\\) at .*$srcfile:.*" \
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"continue to function"
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}
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# This testcase exercises a regression with the in-line step-over
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# machinery. So make sure this runs with displaced stepping disabled,
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# and for good measure, also try with displaced stepping enabled.
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foreach_with_prefix displaced-stepping {"off" "on"} {
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do_test ${displaced-stepping}
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}
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