| 1 | # This testcase is part of GDB, the GNU debugger. |
| 2 | |
| 3 | # Copyright 2009, 2010 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 | if $tracelevel { |
| 25 | strace $tracelevel |
| 26 | } |
| 27 | |
| 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 ${binfile} |
| 46 | |
| 47 | gdb_test "set can-use-hw-watchpoints 1" "" "" |
| 48 | |
| 49 | # |
| 50 | # Run to `main' where we begin our tests. |
| 51 | # |
| 52 | |
| 53 | if ![runto_main] then { |
| 54 | gdb_suppress_tests |
| 55 | } |
| 56 | |
| 57 | gdb_test "break thread_started" \ |
| 58 | "Breakpoint 2 at .*: file .*${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. |
| 90 | gdb_test_no_output "set var test_ready = 1" |
| 91 | |
| 92 | # While debugging. |
| 93 | #gdb_test_no_output "set debug infrun 1" |
| 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 | } |