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[thirdparty/binutils-gdb.git] / gdb / testsuite / gdb.threads / watchthreads2.exp
1 # This testcase is part of GDB, the GNU debugger.
2
3 # Copyright 2009-2019 Free Software Foundation, Inc.
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
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.
27 if {[skip_hw_watchpoint_tests]} {
28 return 0
29 }
30
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"]] != "" } {
33 return -1
34 }
35
36 clean_restart ${binfile}
37
38 gdb_test_no_output "set can-use-hw-watchpoints 1" ""
39
40 #
41 # Run to `main' where we begin our tests.
42 #
43
44 if ![runto_main] then {
45 fail "can't run to main"
46 return 0
47 }
48
49 gdb_test "break thread_started" \
50 "Breakpoint 2 at .*: file .*${srcfile}, line .*" \
51 "breakpoint on thread_started"
52
53 # Run the program until all threads have hit thread_started.
54 # We use this as the vehicle to determine when gdb is aware
55 # of all threads (i.e. "info threads" would show all threads).
56
57 set nr_started 0
58 set message "run to thread_started"
59 for { set i 0 } { $i < $NR_THREADS } { incr i } {
60 gdb_test_multiple "continue" $message {
61 -re ".*Breakpoint 2, thread_started ().*$gdb_prompt $" {
62 incr nr_started
63 }
64 timeout {
65 set i $NR_THREADS
66 }
67 }
68 }
69 if { $nr_started == $NR_THREADS } {
70 pass "all threads started"
71 } else {
72 fail "all threads started"
73 # No point in continuing.
74 return -1
75 }
76
77 # Watch X, it will be modified by all threads.
78 # We want this watchpoint to be set *after* all threads are running.
79 gdb_test "watch x" "Hardware watchpoint 3: x"
80
81 # Now that the watchpoint is set, we can let the threads increment X.
82 gdb_test_no_output "set var test_ready = 1"
83
84 # While debugging.
85 #gdb_test_no_output "set debug infrun 1"
86
87 set x_inc_line [gdb_get_line_number "X increment"]
88 set x_thread_loc "thread_function \\\(arg=.*\\\) at .*watchthreads.c:$x_inc_line"
89
90 # X is incremented under a mutex, so we should get NR_THREADS * X_INCR_COUNT
91 # hits.
92 set limit [expr $NR_THREADS*$X_INCR_COUNT]
93 set x_count 0
94 set done 0
95
96 set message "x watch loop"
97
98 for {set i 0} {!$done && $i < $limit} {incr i} {
99 set test_flag 0
100
101 gdb_test_multiple "continue" $message {
102 -re "(.*Hardware watchpoint.*)$gdb_prompt $" {
103 set string $expect_out(1,string)
104
105 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" $string] {
106 incr x_count
107 set test_flag 1
108 } else {
109 # We test for new value = old value + 1 each iteration.
110 # This can fail due to gdb/10116.
111 # This is caught after the loop exits.
112 }
113 }
114 -re "The program is not being run.*$gdb_prompt $" {
115 fail "$message (program terminated)"
116 }
117 }
118
119 # If we fail above, don't bother continuing loop.
120 if { $test_flag == 0 } {
121 set done 1
122 }
123 }
124
125 if { $i == $limit } {
126 pass "all threads incremented x"
127 } else {
128 kfail "gdb/10116" "gdb can drop watchpoints in multithreaded app"
129 }