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1 | # This testcase is part of GDB, the GNU debugger. |
2 | ||
c5a57081 | 3 | # Copyright 2009-2012 Free Software Foundation, Inc. |
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4 | |
5 | # This program is free software; you can redistribute it and/or modify | |
6 | # it under the terms of the GNU General Public License as published by | |
7 | # the Free Software Foundation; either version 3 of the License, or | |
8 | # (at your option) any later version. | |
9 | # | |
10 | # This program is distributed in the hope that it will be useful, | |
11 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | # GNU General Public License for more details. | |
14 | # | |
15 | # You should have received a copy of the GNU General Public License | |
16 | # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
17 | ||
18 | # Test GDB can cope with two watchpoints being hit by different threads at the | |
19 | # same time, GDB reports one of them and after "continue" to report the other | |
20 | # one GDB should not be confused by differently set watchpoints that time. | |
21 | # This is the goal of "reorder1". "reorder0" tests the basic functionality of | |
22 | # two watchpoints being hit at the same time, without reordering them during the | |
23 | # stop. The formerly broken functionality is due to the all-stop mode default | |
24 | # "show breakpoint always-inserted" being "off". Formerly the remembered hit | |
25 | # could be assigned during continuation of a thread with pending SIGTRAP to the | |
26 | # different/new watchpoint, just based on the watchpoint/debug register number. | |
27 | ||
b800ec70 UW |
28 | if {[skip_hw_watchpoint_access_tests] |
29 | || [skip_hw_watchpoint_multi_tests] | |
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30 | || ![istarget *-*-linux*]} { |
31 | return 0 | |
32 | } | |
33 | ||
34 | set testfile "watchthreads-reorder" | |
35 | set srcfile ${testfile}.c | |
36 | set binfile ${objdir}/${subdir}/${testfile} | |
37 | if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" ${binfile} executable [list debug additional_flags=-lrt]] != "" } { | |
38 | return -1 | |
39 | } | |
40 | ||
0f4d39d5 | 41 | foreach reorder {0 1} { with_test_prefix "reorder$reorder" { |
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42 | |
43 | clean_restart $testfile | |
44 | ||
45 | gdb_test "set can-use-hw-watchpoints 1" | |
46 | ||
47 | if ![runto_main] { | |
48 | return -1 | |
49 | } | |
50 | ||
51 | # Use "rwatch" as "watch" would report the watchpoint changed just based on its | |
52 | # read memory value during a stop by unrelated event. We are interested in not | |
53 | # losing the hardware watchpoint trigger. | |
54 | ||
55 | gdb_test "rwatch thread1_rwatch" "Hardware read watchpoint \[0-9\]+: thread1_rwatch" | |
56 | set test "rwatch thread2_rwatch" | |
57 | gdb_test_multiple $test $test { | |
58 | -re "Target does not support this type of hardware watchpoint\\.\r\n$gdb_prompt $" { | |
59 | # ppc64 supports at most 1 hw watchpoints. | |
60 | unsupported $test | |
61 | return | |
62 | } | |
63 | -re "Hardware read watchpoint \[0-9\]+: thread2_rwatch\r\n$gdb_prompt $" { | |
64 | pass $test | |
65 | } | |
66 | } | |
67 | gdb_breakpoint [gdb_get_line_number "break-at-exit"] | |
68 | ||
69 | # The watchpoints can happen in arbitrary order depending on random: | |
70 | # SEL: Found 2 SIGTRAP events, selecting #[01] | |
71 | # As GDB contains no srand() on the specific host/OS it will behave always the | |
72 | # same. Such order cannot be guaranteed for GDB in general. | |
73 | ||
74 | gdb_test "continue" \ | |
75 | "Hardware read watchpoint \[0-9\]+: thread\[12\]_rwatch\r\n\r\nValue = 0\r\n0x\[0-9a-f\]+ in thread\[12\]_func .*" \ | |
76 | "continue a" | |
77 | ||
78 | if $reorder { | |
79 | # GDB orders watchpoints by their addresses so inserting new variables | |
80 | # with lower addresses will shift the former watchpoints to higher | |
81 | # debug registers. | |
82 | ||
83 | gdb_test "rwatch unused1_rwatch" "Hardware read watchpoint \[0-9\]+: unused1_rwatch" | |
84 | gdb_test "rwatch unused2_rwatch" "Hardware read watchpoint \[0-9\]+: unused2_rwatch" | |
85 | } | |
86 | ||
87 | gdb_test "continue" \ | |
88 | "Hardware read watchpoint \[0-9\]+: thread\[12\]_rwatch\r\n\r\nValue = 0\r\n0x\[0-9a-f\]+ in thread\[12\]_func .*" \ | |
89 | "continue b" | |
90 | ||
91 | # While the debug output itself is not checked in this testcase one bug was | |
92 | # found in the DEBUG_INFRUN code path. | |
93 | gdb_test "set debug infrun 1" | |
94 | ||
95 | gdb_continue_to_breakpoint "break-at-exit" ".*break-at-exit.*" | |
6a5870ce | 96 | }} |