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Fix has been committed to:
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gdb-6.6-scheduler_locking-step-sw-watchpoints2.patch
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Index: gdb-7.10.90.20160211/gdb/testsuite/gdb.base/watchpoint-during-step.exp
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===================================================================
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--- /dev/null 1970-01-01 00:00:00.000000000 +0000
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+++ gdb-7.10.90.20160211/gdb/testsuite/gdb.base/watchpoint-during-step.exp 2016-02-15 23:34:10.455248408 +0100
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@@ -0,0 +1,44 @@
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+# Copyright 2007 Free Software Foundation, Inc.
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+
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+# This program is free software; you can redistribute it and/or modify
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+# it under the terms of the GNU General Public License as published by
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+# the Free Software Foundation; either version 2 of the License, or
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+# (at your option) any later version.
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+#
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+# This program is distributed in the hope that it will be useful,
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+# but WITHOUT ANY WARRANTY; without even the implied warranty of
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+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+# GNU General Public License for more details.
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+#
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+# You should have received a copy of the GNU General Public License
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+# along with this program; if not, write to the Free Software
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+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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+
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+set testfile watchpoint-during-step
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+set srcfile ${testfile}.c
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+set binfile [standard_output_file ${testfile}]
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+if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
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+ untested "Couldn't compile test program"
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+ return -1
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+}
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+
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+# Get things started.
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+
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+gdb_exit
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+gdb_start
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+gdb_reinitialize_dir $srcdir/$subdir
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+gdb_load ${binfile}
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+
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+runto_main
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+
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+gdb_breakpoint [gdb_get_line_number "var = 2"]
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+gdb_continue_to_breakpoint "Find the first var set"
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+
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+gdb_test "step" ".*var = 3;" "Step to the next var set"
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+
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+gdb_test "watch var" "atchpoint .*: var" "Set the watchpoint"
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+
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+# Here is the target point. Be careful to not have breakpoint set on the line
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+# we step from as in this case it is a valid upstream KFAIL gdb/38
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+
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+gdb_test "step" ".*Old value = 2.*New value = 3.*" "Catch the watchpoint"
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Index: gdb-7.10.90.20160211/gdb/testsuite/gdb.base/watchpoint-during-step.c
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===================================================================
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--- /dev/null 1970-01-01 00:00:00.000000000 +0000
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+++ gdb-7.10.90.20160211/gdb/testsuite/gdb.base/watchpoint-during-step.c 2016-02-15 23:32:51.846690279 +0100
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@@ -0,0 +1,30 @@
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+/* This testcase is part of GDB, the GNU debugger.
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+
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+ Copyright 2007 Free Software Foundation, Inc.
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+
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+ This program is free software; you can redistribute it and/or modify
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+ it under the terms of the GNU General Public License as published by
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+ the Free Software Foundation; either version 2 of the License, or
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+ (at your option) any later version.
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+
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+ This program is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ GNU General Public License for more details.
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+
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+ You should have received a copy of the GNU General Public License
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+ along with this program; if not, write to the Free Software
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+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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+
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+ Please email any bugs, comments, and/or additions to this file to:
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+ bug-gdb@prep.ai.mit.edu */
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+
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+static int var;
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+
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+int main()
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+{
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+ var = 1;
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+ var = 2;
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+ var = 3;
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+ return 0;
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+}
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