projects / deliverable / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| b811d2c2 | 1 | # Copyright 2018-2020 Free Software Foundation, Inc. |
| eea61984 PA |
2 | |
| 3 | # This program is free software; you can redistribute it and/or modify | |
| 4 | # it under the terms of the GNU General Public License as published by | |
| 5 | # the Free Software Foundation; either version 3 of the License, or | |
| 6 | # (at your option) any later version. | |
| 7 | # | |
| 8 | # This program is distributed in the hope that it will be useful, | |
| 9 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 10 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 11 | # GNU General Public License for more details. | |
| 12 | # | |
| 13 | # You should have received a copy of the GNU General Public License | |
| 14 | # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 15 | ||
| 16 | # This testcase is a regression test for a regression in the in-line | |
| 17 | # step-over machinery. If a resumption that starts a step-over | |
| 18 | # failed, a following resumption would make GDB hang forever: | |
| 19 | # | |
| 20 | # (gdb) b *0 | |
| 21 | # Breakpoint 2 at 0x0 | |
| 22 | # continue | |
| 23 | # Continuing. | |
| 24 | # Warning: | |
| 25 | # Cannot insert breakpoint 2. | |
| 26 | # Cannot access memory at address 0x0 | |
| 27 | # | |
| 28 | # Command aborted. | |
| 29 | # delete breakpoints | |
| 30 | # Delete all breakpoints? (y or n) y | |
| 31 | # (gdb) b function | |
| 32 | # Breakpoint 3 at 0x40048b: file test.c, line 33. | |
| 33 | # continue | |
| 34 | # Continuing. | |
| 35 | # *GDB hangs forever* | |
| 36 | ||
| 37 | standard_testfile | |
| 38 | ||
| 39 | if {[build_executable "failed to prepare" $testfile $srcfile debug]} { | |
| 40 | return -1 | |
| 41 | } | |
| 42 | ||
| 43 | # DISPLACED indicates whether to use displaced-stepping. | |
| 44 | proc do_test {displaced} { | |
| 45 | global gdb_prompt decimal | |
| 46 | global srcfile binfile | |
| 47 | ||
| 48 | clean_restart $binfile | |
| 49 | ||
| 50 | gdb_test_no_output "set displaced-stepping $displaced" | |
| 51 | ||
| 52 | if ![runto_main] { | |
| 53 | fail "run to main" | |
| 54 | return -1 | |
| 55 | } | |
| 56 | ||
| 57 | # We rely on not being able to set a breakpoint at 0, as proxy for | |
| 58 | # any kind of breakpoint insertion failure. If we can examine | |
| 59 | # what's at memory address 0, it is possible that we could also | |
| 60 | # execute it. | |
| 61 | if [is_address_zero_readable] { | |
| 62 | untested "memory at address 0 is possibly executable" | |
| 63 | return | |
| 64 | } | |
| 65 | ||
| 66 | # Set a breakpoint that fails to insert. | |
| 67 | gdb_test "b *0" "Breakpoint $decimal at 0x0" | |
| 68 | ||
| 69 | gdb_test "continue" \ | |
| 70 | "Command aborted\\." \ | |
| 71 | "continue aborts" | |
| 72 | ||
| 73 | # Delete the "bad" breakpoint and try continuing again. | |
| 74 | delete_breakpoints | |
| 75 | gdb_test "b function" "Breakpoint $decimal .*$srcfile.*" | |
| 76 | ||
| 77 | gdb_test "continue" \ | |
| 78 | "Breakpoint $decimal, function \\(\\) at .*$srcfile:.*" \ | |
| 79 | "continue to function" | |
| 80 | } | |
| 81 | ||
| 82 | # This testcase exercises a regression with the in-line step-over | |
| 83 | # machinery. So make sure this runs with displaced stepping disabled, | |
| 84 | # and for good measure, also try with displaced stepping enabled. | |
| 85 | foreach_with_prefix displaced-stepping {"off" "on"} { | |
| 86 | do_test ${displaced-stepping} | |
| 87 | } |