Add counter-cases for trace-condition.exp tests

In trace-condition.exp, tests are done by doing a conditional tracepoint
and validating that the trace contains all the frames that could be
collected if that condition is true.

E.g. test_tracepoints $trace_command "21 + 21 == 42" 10

This will always return true and collect the 10 frames possible to collect
with the test program.

However, if the condition evaluation is broken such that the condition is
unconditional we will not notice this problem.

This patch adds counter-cases to such conditions like so:

$trace_command "21 + 11 == 42" 0

This way such a problem would be noticed.

gdb/testsuite/ChangeLog:

	* gdb.trace/trace-condition.exp: Add counter-case tests.

2 files changed, 42 insertions, 0 deletions

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 8397f67..45c3ff0 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2016-05-30  Antoine Tremblay  <antoine.tremblay@ericsson.com>
+
+	* gdb.trace/trace-condition.exp: Add counter-case tests.
+
 2016-05-30  Jan Kratochvil  <jan.kratochvil@redhat.com>
 
 	PR c++/15231
diff --git a/gdb/testsuite/gdb.trace/trace-condition.exp b/gdb/testsuite/gdb.trace/trace-condition.exp
index b7427ca..ca3232f 100644
--- a/gdb/testsuite/gdb.trace/trace-condition.exp
+++ b/gdb/testsuite/gdb.trace/trace-condition.exp
@@ -138,23 +138,61 @@ foreach trace_command { "trace" "ftrace" } {
 
     # Test various operations to cover as many opcodes as possible.
     test_tracepoints $trace_command "21 + 21 == 42" 10
+    test_tracepoints $trace_command "21 + 21 == 11" 0
+
     test_tracepoints $trace_command "42 - 21 == 21" 10
+    test_tracepoints $trace_command "42 - 21 == 11" 0
+
     test_tracepoints $trace_command "21 * 2 == 42" 10
+    test_tracepoints $trace_command "21 * 2 == 11" 0
+
     test_tracepoints $trace_command "21 << 1 == 42" 10
+    test_tracepoints $trace_command "21 << 1 == 11" 0
+
     test_tracepoints $trace_command "42 >> 1 == 21" 10
+    test_tracepoints $trace_command "42 >> 1 == 11" 0
+
     test_tracepoints $trace_command "-(21 << 1) == -42" 10
+    test_tracepoints $trace_command "-(21 << 1) == -11" 0
+
     test_tracepoints $trace_command "-42 >> 1 == -21" 10
+    test_tracepoints $trace_command "-42 >> 1 == -11" 0
+
     test_tracepoints $trace_command "(0xabababab & 0x0000ffff) == 0xabab" 10
+    test_tracepoints $trace_command "(0xabababab & 0x0000ffff) == 0xffff" 0
+
     test_tracepoints $trace_command "(0xabababab | 0x0000ffff) == 0xababffff" 10
+    test_tracepoints $trace_command "(0xabababab | 0x0000ffff) == 0xeeeedddd" 0
+
     test_tracepoints $trace_command "(0xaaaaaaaa ^ 0x55555555) == 0xffffffff" 10
+    test_tracepoints $trace_command "(0xaaaaaaaa ^ 0x55555555) == 0xaaaaaaaa" 0
+
     test_tracepoints $trace_command "~0xaaaaaaaa == 0x55555555" 10
+    test_tracepoints $trace_command "~0xaaaaaaaa == 0x11111111" 0
+
     test_tracepoints $trace_command "21 < 42" 10
+    test_tracepoints $trace_command "61 < 42" 0
+
     test_tracepoints $trace_command "42 <= 42" 10
+    test_tracepoints $trace_command "42 <= 11" 0
+
     test_tracepoints $trace_command "42 >= 42" 10
+    test_tracepoints $trace_command "11 >= 42" 0
+
     test_tracepoints $trace_command "42 > 21" 10
+    test_tracepoints $trace_command "11 > 21" 0
+
     test_tracepoints $trace_command "(21 < 42 ? 0 : 1) == 0" 10 18955_i386_failure
+    test_tracepoints $trace_command "(66 < 42 ? 0 : 1) == 0" 0 18955_i386_failure
+
     test_tracepoints $trace_command "(42 <= 42 ? 0 : 1) == 0" 10
+    test_tracepoints $trace_command "(66 <= 42 ? 0 : 1) == 0" 0
+
     test_tracepoints $trace_command "(42 >= 42 ? 0 : 1) == 0" 10
+    test_tracepoints $trace_command "(11 >= 42 ? 0 : 1) == 0" 0
+
     test_tracepoints $trace_command "(42 > 21 ? 0 : 1) == 0" 10 18955_i386_failure
+    test_tracepoints $trace_command "(11 > 21 ? 0 : 1) == 0" 0 18955_i386_failure
+
     test_tracepoints $trace_command "\$trace_timestamp >= 0" 10
 }