1 # This testcase is part of GDB, the GNU debugger.
3 # Copyright 2009-2015 Free Software Foundation, Inc.
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13 # GNU General Public License for more details.
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18 # Check that watchpoints get propagated to all existing threads when the
19 # watchpoint is created.
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]} {
32 if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug "additional_flags=-DNR_THREADS=$NR_THREADS -DX_INCR_COUNT=$X_INCR_COUNT"]] != "" } {
36 clean_restart ${binfile}
38 gdb_test_no_output "set can-use-hw-watchpoints 1" ""
41 # Run to `main' where we begin our tests.
44 if ![runto_main] then {
48 gdb_test "break thread_started" \
49 "Breakpoint 2 at .*: file .*${srcfile}, line .*" \
50 "breakpoint on thread_started"
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).
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 $" {
68 if { $nr_started == $NR_THREADS } {
69 pass "all threads started"
71 fail "all threads started"
72 # No point in continuing.
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"
80 # Now that the watchpoint is set, we can let the threads increment X.
81 gdb_test_no_output "set var test_ready = 1"
84 #gdb_test_no_output "set debug infrun 1"
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"
89 # X is incremented under a mutex, so we should get NR_THREADS * X_INCR_COUNT
91 set limit [expr $NR_THREADS*$X_INCR_COUNT]
95 set message "x watch loop"
97 for {set i 0} {!$done && $i < $limit} {incr i} {
100 gdb_test_multiple "continue" $message {
101 -re "(.*Hardware watchpoint.*)$gdb_prompt $" {
102 set string $expect_out(1,string)
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" $string] {
108 # We test for new value = old value + 1 each iteration.
109 # This can fail due to gdb/10116.
110 # This is caught after the loop exits.
113 -re "The program is not being run.*$gdb_prompt $" {
114 fail "$message (program terminated)"
118 # If we fail above, don't bother continuing loop.
119 if { $test_flag == 0 } {
124 if { $i == $limit } {
125 pass "all threads incremented x"
127 kfail "gdb/10116" "gdb can drop watchpoints in multithreaded app"