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1 | # This testcase is part of GDB, the GNU debugger. |
2 | ||
7b6bb8da | 3 | # Copyright 2009, 2010, 2011 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 | ||
24 | if $tracelevel { | |
25 | strace $tracelevel | |
26 | } | |
27 | ||
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28 | |
29 | # This test verifies that a watchpoint is detected in the proper thread | |
30 | # so the test is only meaningful on a system with hardware watchpoints. | |
31 | if [target_info exists gdb,no_hardware_watchpoints] { | |
32 | return 0; | |
33 | } | |
34 | ||
35 | set testfile "watchthreads2" | |
36 | set srcfile ${testfile}.c | |
37 | set binfile ${objdir}/${subdir}/${testfile} | |
38 | if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug "incdir=${objdir}" "additional_flags=-DNR_THREADS=$NR_THREADS -DX_INCR_COUNT=$X_INCR_COUNT"]] != "" } { | |
39 | return -1 | |
40 | } | |
41 | ||
42 | gdb_exit | |
43 | gdb_start | |
44 | gdb_reinitialize_dir $srcdir/$subdir | |
45 | gdb_load ${binfile} | |
46 | ||
35ec993f | 47 | gdb_test_no_output "set can-use-hw-watchpoints 1" "" |
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48 | |
49 | # | |
50 | # Run to `main' where we begin our tests. | |
51 | # | |
52 | ||
53 | if ![runto_main] then { | |
54 | gdb_suppress_tests | |
55 | } | |
56 | ||
57 | gdb_test "break thread_started" \ | |
58 | "Breakpoint 2 at .*: file .*${srcfile}, line .*" \ | |
59 | "breakpoint on thread_started" | |
60 | ||
61 | # Run the program until all threads have hit thread_started. | |
62 | # We use this as the vehicle to determine when gdb is aware | |
63 | # of all threads (i.e. "info threads" would show all threads). | |
64 | ||
65 | set nr_started 0 | |
66 | set message "run to thread_started" | |
67 | for { set i 0 } { $i < $NR_THREADS } { incr i } { | |
68 | gdb_test_multiple "continue" $message { | |
69 | -re ".*Breakpoint 2, thread_started ().*$gdb_prompt $" { | |
70 | incr nr_started | |
71 | } | |
72 | timeout { | |
73 | set i $NR_THREADS | |
74 | } | |
75 | } | |
76 | } | |
77 | if { $nr_started == $NR_THREADS } { | |
78 | pass "all threads started" | |
79 | } else { | |
80 | fail "all threads started" | |
81 | # No point in continuing. | |
82 | return -1 | |
83 | } | |
84 | ||
85 | # Watch X, it will be modified by all threads. | |
86 | # We want this watchpoint to be set *after* all threads are running. | |
87 | gdb_test "watch x" "Hardware watchpoint 3: x" | |
88 | ||
89 | # Now that the watchpoint is set, we can let the threads increment X. | |
12b5d08a | 90 | gdb_test_no_output "set var test_ready = 1" |
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91 | |
92 | # While debugging. | |
12b5d08a | 93 | #gdb_test_no_output "set debug infrun 1" |
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94 | |
95 | set x_inc_line [gdb_get_line_number "X increment"] | |
96 | set x_thread_loc "thread_function \\\(arg=.*\\\) at .*watchthreads.c:$x_inc_line" | |
97 | ||
98 | # X is incremented under a mutex, so we should get NR_THREADS * X_INCR_COUNT | |
99 | # hits. | |
100 | set limit [expr $NR_THREADS*$X_INCR_COUNT] | |
101 | set x_count 0 | |
102 | set done 0 | |
103 | ||
104 | set message "x watch loop" | |
105 | ||
106 | for {set i 0} {!$done && $i < $limit} {incr i} { | |
107 | set test_flag 0 | |
108 | ||
109 | gdb_test_multiple "continue" $message { | |
110 | -re "(.*Hardware watchpoint.*)$gdb_prompt $" { | |
111 | set string $expect_out(1,string) | |
112 | ||
113 | 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" $string] { | |
114 | incr x_count | |
115 | set test_flag 1 | |
116 | } else { | |
117 | # We test for new value = old value + 1 each iteration. | |
118 | # This can fail due to gdb/10116. | |
119 | # This is caught after the loop exits. | |
120 | } | |
121 | } | |
122 | -re "The program is not being run.*$gdb_prompt $" { | |
123 | fail "$message (program terminated)" | |
124 | } | |
125 | } | |
126 | ||
127 | # If we fail above, don't bother continuing loop. | |
128 | if { $test_flag == 0 } { | |
129 | set done 1 | |
130 | } | |
131 | } | |
132 | ||
133 | if { $i == $limit } { | |
134 | pass "all threads incremented x" | |
135 | } else { | |
136 | kfail "gdb/10116" "gdb can drop watchpoints in multithreaded app" | |
137 | } |