[PATCH v4 12/15] [gdb/testsuite]: fix gdb.base/jit-elf.exp when testing with clang

[Bruno Larsen <blarsen@redhat.com>]

When using clang as the compiler for the target, gdb.base/jit-elf.exp
was failing with the following output:

       (gdb) attach 3674146
       Attaching to program: /home/blarsen/Documents/gdb-build/gdb/testsuite/outputs/gdb.base/jit-elf/jit-elf-main, process 3674146
       Reading symbols from /lib64/libm.so.6...
       Reading symbols from .gnu_debugdata for /lib64/libm.so.6...
       (No debugging symbols found in .gnu_debugdata for /lib64/libm.so.6)
       Reading symbols from /lib64/libc.so.6...
       (No debugging symbols found in /lib64/libc.so.6)
       Reading symbols from /lib64/ld-linux-x86-64.so.2...
       [Thread debugging using libthread_db enabled]
       Using host libthread_db library "/lib64/libthread_db.so.1".
       0x00000000004013ff in main (argc=3, argv=0x7fffffffd820) at ../../../common/git-repos/binutils-gdb/gdb/testsuite/gdb.base/jit-elf-main.c:118
       118|  WAIT_FOR_GDB; i = 0;  /* gdb break here 1 */
       (gdb) FAIL: gdb.base/jit-elf.exp: attach: one_jit_test-2: break here 1: attach

While gcc's output is as follows:

       (gdb) attach 3592961
       Attaching to program: /home/blarsen/Documents/gdb-build/gdb/testsuite/outputs/gdb.base/jit-elf/jit-elf-main, process 3592961
       Reading symbols from /lib64/libm.so.6...
       Reading symbols from .gnu_debugdata for /lib64/libm.so.6...
       (No debugging symbols found in .gnu_debugdata for /lib64/libm.so.6)
       Reading symbols from /lib64/libc.so.6...
       (No debugging symbols found in /lib64/libc.so.6)
       Reading symbols from /lib64/ld-linux-x86-64.so.2...
       [Thread debugging using libthread_db enabled]
       Using host libthread_db library "/lib64/libthread_db.so.1".
       main (argc=3, argv=0x7fffffffd860) at /home/blarsen/Documents/gdb-build/gdb/testsuite/../../../common/git-repos/binutils-gdb/gdb/testsuite/gdb.base/jit-elf-main.c:118
       118|  WAIT_FOR_GDB; i = 0;  /* gdb break here 1 */
       (gdb) PASS: gdb.base/jit-elf.exp: attach: one_jit_test-2: break here 1: attach

Clang-compiled code is clearly working, as gdb is attaching and running
to the established breakpoint. To fix the false positive, the regexp for
checking where gdb has stopped was relaxed a little, to allow for the
address at the start of the line, and to allow the relative path.
---
 gdb/testsuite/gdb.base/jit-elf.exp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gdb/testsuite/gdb.base/jit-elf.exp b/gdb/testsuite/gdb.base/jit-elf.exp
index 38d541f74b9..0f296dfd579 100644
--- a/gdb/testsuite/gdb.base/jit-elf.exp
+++ b/gdb/testsuite/gdb.base/jit-elf.exp
@@ -54,7 +54,7 @@ proc clean_reattach {} {
     clean_restart ${main_binfile}
 
     if { ![gdb_attach $testpid \
-	      -pattern "main.*at .*$::main_srcfile:.*"] } {
+	      -pattern ".*main.*at .*$::main_basename.c:.*"] } {
 	return 0
     }
 
-- 
2.31.1