| # This testcase is part of GDB, the GNU debugger. |
| |
| # Copyright 2009-2014 Free Software Foundation, Inc. |
| |
| # This program is free software; you can redistribute it and/or modify |
| # it under the terms of the GNU General Public License as published by |
| # the Free Software Foundation; either version 3 of the License, or |
| # (at your option) any later version. |
| # |
| # This program is distributed in the hope that it will be useful, |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| # GNU General Public License for more details. |
| # |
| # You should have received a copy of the GNU General Public License |
| # along with this program. If not, see <http://www.gnu.org/licenses/>. |
| |
| # Check that watchpoints get propagated to all existing threads when the |
| # watchpoint is created. |
| |
| set NR_THREADS 4 |
| set X_INCR_COUNT 10 |
| |
| |
| # This test verifies that a watchpoint is detected in the proper thread |
| # so the test is only meaningful on a system with hardware watchpoints. |
| if {[skip_hw_watchpoint_tests]} { |
| return 0 |
| } |
| |
| standard_testfile |
| if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug "additional_flags=-DNR_THREADS=$NR_THREADS -DX_INCR_COUNT=$X_INCR_COUNT"]] != "" } { |
| return -1 |
| } |
| |
| clean_restart ${binfile} |
| |
| gdb_test_no_output "set can-use-hw-watchpoints 1" "" |
| |
| # |
| # Run to `main' where we begin our tests. |
| # |
| |
| if ![runto_main] then { |
| gdb_suppress_tests |
| } |
| |
| gdb_test "break thread_started" \ |
| "Breakpoint 2 at .*: file .*${srcfile}, line .*" \ |
| "breakpoint on thread_started" |
| |
| # Run the program until all threads have hit thread_started. |
| # We use this as the vehicle to determine when gdb is aware |
| # of all threads (i.e. "info threads" would show all threads). |
| |
| set nr_started 0 |
| set message "run to thread_started" |
| for { set i 0 } { $i < $NR_THREADS } { incr i } { |
| gdb_test_multiple "continue" $message { |
| -re ".*Breakpoint 2, thread_started ().*$gdb_prompt $" { |
| incr nr_started |
| } |
| timeout { |
| set i $NR_THREADS |
| } |
| } |
| } |
| if { $nr_started == $NR_THREADS } { |
| pass "all threads started" |
| } else { |
| fail "all threads started" |
| # No point in continuing. |
| return -1 |
| } |
| |
| # Watch X, it will be modified by all threads. |
| # We want this watchpoint to be set *after* all threads are running. |
| gdb_test "watch x" "Hardware watchpoint 3: x" |
| |
| # Now that the watchpoint is set, we can let the threads increment X. |
| gdb_test_no_output "set var test_ready = 1" |
| |
| # While debugging. |
| #gdb_test_no_output "set debug infrun 1" |
| |
| set x_inc_line [gdb_get_line_number "X increment"] |
| set x_thread_loc "thread_function \\\(arg=.*\\\) at .*watchthreads.c:$x_inc_line" |
| |
| # X is incremented under a mutex, so we should get NR_THREADS * X_INCR_COUNT |
| # hits. |
| set limit [expr $NR_THREADS*$X_INCR_COUNT] |
| set x_count 0 |
| set done 0 |
| |
| set message "x watch loop" |
| |
| for {set i 0} {!$done && $i < $limit} {incr i} { |
| set test_flag 0 |
| |
| gdb_test_multiple "continue" $message { |
| -re "(.*Hardware watchpoint.*)$gdb_prompt $" { |
| set string $expect_out(1,string) |
| |
| 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" $string] { |
| incr x_count |
| set test_flag 1 |
| } else { |
| # We test for new value = old value + 1 each iteration. |
| # This can fail due to gdb/10116. |
| # This is caught after the loop exits. |
| } |
| } |
| -re "The program is not being run.*$gdb_prompt $" { |
| fail "$message (program terminated)" |
| } |
| } |
| |
| # If we fail above, don't bother continuing loop. |
| if { $test_flag == 0 } { |
| set done 1 |
| } |
| } |
| |
| if { $i == $limit } { |
| pass "all threads incremented x" |
| } else { |
| kfail "gdb/10116" "gdb can drop watchpoints in multithreaded app" |
| } |