[PATCH v2 3/4] [gdb/testsuite] Fix end_sequence addresses

[Carl Love]

Tom:

The following patch fixes the issue for me on PowerPC.  Please let me know if it looks ok and if the patch works on your systems as well.  Thanks.

                        Carl 

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Fix end_sequence addresses for dw2-lines.exp

The patch:

  From f0d556d14b1d1c3f8e2f9c13b08adca22e1b8c9c Mon Sep 17 00:00:00 2001
  From: Tom de Vries <tdevries@suse.de>
  Date: Wed, 17 Apr 2024 12:55:00 +0200
  Subject: [PATCH] [gdb/testsuite] Fix end_sequence addresses

  I noticed in test-case gdb.reverse/map-to-same-line.exp, that the end of main:
  ...
  00000000004102c4 <end_of_sequence>:
    4102c4:       52800000        mov     w0, #0x0                        // #0
   4102c8:       9100c3ff        add     sp, sp, #0x30
    4102cc:       d65f03c0        ret
  ...
  is not described by the line table:
  ...
  File name                    Line number    Starting address    View    Stmt
    ...
  map-to-same-line.c                    54            0x4102ac               x
  map-to-same-line.c                     -            0x4102c4
  ...

  Fix this by ending the line table at $main_end.

  Likewise in a few other test-cases, found using:
  ...
  $ find gdb/testsuite/ -type f \
    | xargs grep -B1 DW_LNE_end_sequence \
    | grep set_address \
    | egrep -v "_end|_len"
  ...

  Tested on aarch64-linux.
  ---
   gdb/testsuite/gdb.dwarf2/dw2-gas-workaround.exp         | 2 +-
   gdb/testsuite/gdb.dwarf2/dw2-inline-header-1.exp        | 2 +-
   gdb/testsuite/gdb.dwarf2/dw2-inline-header-2.exp        | 2 +-
   gdb/testsuite/gdb.dwarf2/dw2-inline-header-3.exp        | 2 +-
   gdb/testsuite/gdb.dwarf2/dw2-line-number-zero.exp       | 7 +++++--
   gdb/testsuite/gdb.dwarf2/dw2-lines.exp                  | 2 +-
   gdb/testsuite/gdb.dwarf2/dw2-vendor-extended-opcode.exp | 4 +++-
   gdb/testsuite/gdb.dwarf2/imported-unit-bp.exp.tcl       | 2 +-
   gdb/testsuite/gdb.reverse/map-to-same-line.c            | 1 -
   gdb/testsuite/gdb.reverse/map-to-same-line.exp          | 3 ++-
   10 files changed, 16 insertions(+), 11 deletions(-)

The issue in file dw2-lines.exp is the change


-               DW_LNE_set_address bar_label_5
+               DW_LNE_set_address "$main_start + $main_len"

The label bar_label_5 is in function bar, not function  main.  The new
set address should have been $bar_start + $bar_len.
---
 gdb/testsuite/gdb.dwarf2/dw2-lines.exp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gdb/testsuite/gdb.dwarf2/dw2-lines.exp b/gdb/testsuite/gdb.dwarf2/dw2-lines.exp
index 85d5e9c8afb..af5b6b71768 100644
--- a/gdb/testsuite/gdb.dwarf2/dw2-lines.exp
+++ b/gdb/testsuite/gdb.dwarf2/dw2-lines.exp
@@ -104,7 +104,7 @@ proc test_1 { _cv _cdw64 _lv _ldw64 {_string_form ""}} {
 		line [line_for bar_label_4]
 		DW_LNS_copy
 
-		DW_LNE_set_address "$main_start + $main_len"
+		DW_LNE_set_address "$bar_start + $bar_len"
 		DW_LNE_end_sequence
 	    }
 	}
-- 
2.44.0