[gdb] Fix gdb.dwarf2/varval.exp with -fPIE/-pie

With target board unix/-fPIE/-pie, we get:
...
FAIL: gdb.dwarf2/varval.exp: print varval2
...

This is due comparing a get_frame_pc result (which includes the for PIE
non-zero relocation offset) with pc_high and pc_low obtained using
get_scope_pc_bounds (which do not include the relocation offset).

Fix this by adjusting pc_high and pc_low with the relocation offset.

Tested on x86_64-linux with target board unix/-fPIE/-pie.

gdb/ChangeLog:

2019-08-09  Tom de Vries  <tdevries@suse.de>

	PR gdb/24591
	* dwarf2read.c (dwarf2_fetch_die_loc_sect_off): Adjust pc_high and
	pc_low with relocation offset.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 04bb14e..6e6390c 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2019-08-09  Tom de Vries  <tdevries@suse.de>
+
+       PR gdb/24591
+       * dwarf2read.c (dwarf2_fetch_die_loc_sect_off): Adjust pc_high and
+       pc_low with relocation offset.
+
 2019-08-07  Tom Tromey  <tromey@adacore.com>
 
        * stack.c (print_frame_arg, read_frame_local, read_frame_arg)

diff --git a/gdb/dwarf2read.c b/gdb/dwarf2read.c
index 1c26f83..de9755f 100644 (file)
--- a/gdb/dwarf2read.c
+++ b/gdb/dwarf2read.c
@@ -23206,6 +23206,9 @@ dwarf2_fetch_die_loc_sect_off (sect_offset sect_off,
          != dwarf2_per_objfile->abstract_to_concrete.end ()))
     {
       CORE_ADDR pc = (*get_frame_pc) (baton);
+      CORE_ADDR baseaddr
+       = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
+      struct gdbarch *gdbarch = get_objfile_arch (objfile);
 
       for (const auto &cand_off
             : dwarf2_per_objfile->abstract_to_concrete[die->sect_off])
@@ -23220,8 +23223,11 @@ dwarf2_fetch_die_loc_sect_off (sect_offset sect_off,
 
          CORE_ADDR pc_low, pc_high;
          get_scope_pc_bounds (cand->parent, &pc_low, &pc_high, cu);
-         if (pc_low == ((CORE_ADDR) -1)
-             || !(pc_low <= pc && pc < pc_high))
+         if (pc_low == ((CORE_ADDR) -1))
+           continue;
+         pc_low = gdbarch_adjust_dwarf2_addr (gdbarch, pc_low + baseaddr);
+         pc_high = gdbarch_adjust_dwarf2_addr (gdbarch, pc_high + baseaddr);
+         if (!(pc_low <= pc && pc < pc_high))
            continue;
 
          die = cand;