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dc621c35 DE |
1 | # This testcase is part of GDB, the GNU debugger. |
2 | ||
32d0add0 | 3 | # Copyright 2009-2015 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 | # Check that watchpoints get propagated to all existing threads when the | |
19 | # watchpoint is created. | |
20 | ||
21 | set NR_THREADS 4 | |
22 | set X_INCR_COUNT 10 | |
23 | ||
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24 | |
25 | # This test verifies that a watchpoint is detected in the proper thread | |
26 | # so the test is only meaningful on a system with hardware watchpoints. | |
b800ec70 UW |
27 | if {[skip_hw_watchpoint_tests]} { |
28 | return 0 | |
dc621c35 DE |
29 | } |
30 | ||
0efbbabc TT |
31 | standard_testfile |
32 | if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug "additional_flags=-DNR_THREADS=$NR_THREADS -DX_INCR_COUNT=$X_INCR_COUNT"]] != "" } { | |
dc621c35 DE |
33 | return -1 |
34 | } | |
35 | ||
0efbbabc | 36 | clean_restart ${binfile} |
dc621c35 | 37 | |
35ec993f | 38 | gdb_test_no_output "set can-use-hw-watchpoints 1" "" |
dc621c35 DE |
39 | |
40 | # | |
41 | # Run to `main' where we begin our tests. | |
42 | # | |
43 | ||
44 | if ![runto_main] then { | |
45 | gdb_suppress_tests | |
46 | } | |
47 | ||
48 | gdb_test "break thread_started" \ | |
49 | "Breakpoint 2 at .*: file .*${srcfile}, line .*" \ | |
50 | "breakpoint on thread_started" | |
51 | ||
52 | # Run the program until all threads have hit thread_started. | |
53 | # We use this as the vehicle to determine when gdb is aware | |
54 | # of all threads (i.e. "info threads" would show all threads). | |
55 | ||
56 | set nr_started 0 | |
57 | set message "run to thread_started" | |
58 | for { set i 0 } { $i < $NR_THREADS } { incr i } { | |
59 | gdb_test_multiple "continue" $message { | |
60 | -re ".*Breakpoint 2, thread_started ().*$gdb_prompt $" { | |
61 | incr nr_started | |
62 | } | |
63 | timeout { | |
64 | set i $NR_THREADS | |
65 | } | |
66 | } | |
67 | } | |
68 | if { $nr_started == $NR_THREADS } { | |
69 | pass "all threads started" | |
70 | } else { | |
71 | fail "all threads started" | |
72 | # No point in continuing. | |
73 | return -1 | |
74 | } | |
75 | ||
76 | # Watch X, it will be modified by all threads. | |
77 | # We want this watchpoint to be set *after* all threads are running. | |
78 | gdb_test "watch x" "Hardware watchpoint 3: x" | |
79 | ||
80 | # Now that the watchpoint is set, we can let the threads increment X. | |
12b5d08a | 81 | gdb_test_no_output "set var test_ready = 1" |
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82 | |
83 | # While debugging. | |
12b5d08a | 84 | #gdb_test_no_output "set debug infrun 1" |
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85 | |
86 | set x_inc_line [gdb_get_line_number "X increment"] | |
87 | set x_thread_loc "thread_function \\\(arg=.*\\\) at .*watchthreads.c:$x_inc_line" | |
88 | ||
89 | # X is incremented under a mutex, so we should get NR_THREADS * X_INCR_COUNT | |
90 | # hits. | |
91 | set limit [expr $NR_THREADS*$X_INCR_COUNT] | |
92 | set x_count 0 | |
93 | set done 0 | |
94 | ||
95 | set message "x watch loop" | |
96 | ||
97 | for {set i 0} {!$done && $i < $limit} {incr i} { | |
98 | set test_flag 0 | |
99 | ||
100 | gdb_test_multiple "continue" $message { | |
101 | -re "(.*Hardware watchpoint.*)$gdb_prompt $" { | |
102 | set string $expect_out(1,string) | |
103 | ||
104 | if [regexp "Hardware watchpoint 3: x\[^\r\]*\r\[^\r\]*\r\[^\r\]*Old value = $x_count\[^\r\]*\r\[^\r\]*New value = [expr $x_count+1]\r" $string] { | |
105 | incr x_count | |
106 | set test_flag 1 | |
107 | } else { | |
108 | # We test for new value = old value + 1 each iteration. | |
109 | # This can fail due to gdb/10116. | |
110 | # This is caught after the loop exits. | |
111 | } | |
112 | } | |
113 | -re "The program is not being run.*$gdb_prompt $" { | |
114 | fail "$message (program terminated)" | |
115 | } | |
116 | } | |
117 | ||
118 | # If we fail above, don't bother continuing loop. | |
119 | if { $test_flag == 0 } { | |
120 | set done 1 | |
121 | } | |
122 | } | |
123 | ||
124 | if { $i == $limit } { | |
125 | pass "all threads incremented x" | |
126 | } else { | |
127 | kfail "gdb/10116" "gdb can drop watchpoints in multithreaded app" | |
128 | } |