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btrace, test: avoid gdb.btrace/vdso.exp fail

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The vdso.exp test checks that we can access the VDSO memory when replaying.

Depending on the line information generated by the compiler, runto_main may run
to the line marked with bp.1 or stop before that line.  The test incorrectly
assumes that it will always run to the marked line and fails if it doesn't.

The test does not really care about what is traced.  It does care that GDB is
replaying when capturing the second disassemble output.

Reflect that in the test by ignoring the output of the stepping and record goto
begin commands and by checking that GDB is actually replaying.

testsuite/
	* gdb.btrace/vdso.c (main): Remove breakpoint markers.
	* gdb.btrace/vdso.exp: Change stepping command to "next" and ignore
	its output.  Ignore the output of "record goto begin" and instead
	check that GDB is replaying.
This commit is contained in:
Markus Metzger 2015-09-30 11:41:35 +02:00
parent 145e3ddb4b
commit abcef95aa5
3 changed files with 14 additions and 4 deletions
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7
gdb/testsuite/ChangeLog
View File

@ -1,3 +1,10 @@
2015-10-09 Markus Metzger <markus.t.metzger@intel.com>
* gdb.btrace/vdso.c (main): Remove breakpoint markers.
* gdb.btrace/vdso.exp: Change stepping command to "next" and ignore
its output. Ignore the output of "record goto begin" and instead
check that GDB is replaying.
2015-10-09 Pedro Alves <palves@redhat.com>
* gdb.base/a2-run.exp (maybe_exp_continue): New procedure.

4
gdb/testsuite/gdb.btrace/vdso.c
View File

@ -24,7 +24,7 @@ main (void)
{
struct timeval tv;
gettimeofday (&tv, 0); /* main.1. */
gettimeofday (&tv, 0);
return 0; /* main.2. */
return 0;
}

7
gdb/testsuite/gdb.btrace/vdso.exp
View File

@ -37,11 +37,14 @@ set live_gettimeofday [capture_command_output "disassemble gettimeofday" ""]
# trace the test code
gdb_test_no_output "record btrace"
gdb_test "next" "main\.2.*"
gdb_test "stepi" ".*"
with_test_prefix "replay" {
# start replaying
gdb_test "record goto begin" ".*"
gdb_test "info record" "Replay in progress\.\[^\\\r\\\n\]*"
# capture the disassembly of gettimeofday while replaying
gdb_test "record goto begin" "main\.1.*"
set replay_gettimeofday [capture_command_output "disassemble gettimeofday" ""]
# the two disassemblies must be identical