1 # This testcase is part of GDB, the GNU debugger.
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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 require allow_hw_watchpoint_tests
30 if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug "additional_flags=-DNR_THREADS=$NR_THREADS -DX_INCR_COUNT=$X_INCR_COUNT"]] != "" } {
34 clean_restart ${binfile}
36 gdb_test_no_output "set can-use-hw-watchpoints 1" ""
39 # Run to `main' where we begin our tests.
46 gdb_test "break thread_started" \
47 "Breakpoint 2 at .*: file .*${srcfile}, line .*" \
48 "breakpoint on thread_started"
50 # Run the program until all threads have hit thread_started.
51 # We use this as the vehicle to determine when gdb is aware
52 # of all threads (i.e. "info threads" would show all threads).
55 set message "run to thread_started"
56 for { set i 0 } { $i < $NR_THREADS } { incr i } {
57 gdb_test_multiple "continue" $message {
58 -re ".*Breakpoint 2, thread_started ().*$gdb_prompt $" {
66 if { $nr_started == $NR_THREADS } {
67 pass "all threads started"
69 fail "all threads started"
70 # No point in continuing.
74 # Check that multiple uses of the 'thread' keyword will give an error.
75 gdb_test "watch x thread 1 thread 2" "You can specify only one thread\\."
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"
81 # Now that the watchpoint is set, we can let the threads increment X.
82 gdb_test_no_output "set var test_ready = 1"
85 #gdb_test_no_output "set debug infrun 1"
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"
90 # X is incremented under a mutex, so we should get NR_THREADS * X_INCR_COUNT
92 set limit [expr $NR_THREADS*$X_INCR_COUNT]
96 set message "x watch loop"
98 for {set i 0} {!$done && $i < $limit} {incr i} {
101 gdb_test_multiple "continue" $message {
102 -re "(.*Hardware watchpoint.*)$gdb_prompt $" {
103 set string $expect_out(1,string)
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" $string] {
109 # We test for new value = old value + 1 each iteration.
110 # This can fail due to gdb/10116.
111 # This is caught after the loop exits.
114 -re "The program is not being run.*$gdb_prompt $" {
115 fail "$message (program terminated)"
119 # If we fail above, don't bother continuing loop.
120 if { $test_flag == 0 } {
125 if { $i == $limit } {
126 pass "all threads incremented x"
128 kfail "gdb/10116" "gdb can drop watchpoints in multithreaded app"