[PATCH][gdb/testsuite] Fix regexp in py-rbreak.exp

[Tom de Vries <tdevries@suse.de>]

Hi,

this fails for me on openSUSE Leap 15.0:
...
FAIL: gdb.python/py-rbreak.exp: check number of returned breakpoints is 11
...

The rbreak "" command expects 11 breaks, but I see two extra for
__libc_csu_fini and __libc_csu_init:
...
Breakpoint 13 at 0x4005b0: file elf-init.c, line 106.^M
Breakpoint 14 at 0x400540: file elf-init.c, line 68.^M
...

This patch fixes the failing test by excluding functions starting with an
underscore.

Tested on x86_64-linux.

OK for trunk?

Thanks,
- Tom

[gdb/testsuite] Fix regexp in py-rbreak.exp

---
 gdb/testsuite/gdb.python/py-rbreak.exp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gdb/testsuite/gdb.python/py-rbreak.exp b/gdb/testsuite/gdb.python/py-rbreak.exp
index 97ebd79f67..8e68402179 100644
--- a/gdb/testsuite/gdb.python/py-rbreak.exp
+++ b/gdb/testsuite/gdb.python/py-rbreak.exp
@@ -33,7 +33,7 @@ if ![runto_main] then {
 }
 
 gdb_test_no_output "nosharedlibrary"
-gdb_py_test_silent_cmd "py sl = gdb.rbreak(\"\",minsyms=False)" \
+gdb_py_test_silent_cmd "py sl = gdb.rbreak(\"^\[^_\]\",minsyms=False)" \
     "get all function breakpoints" 0
 gdb_test "py print(len(sl))" "11" \
     "check number of returned breakpoints is 11"

OK for trunk?