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55 lines
2.0 KiB
55 lines
2.0 KiB
2 weeks ago
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From FEDORA_PATCHES Mon Sep 17 00:00:00 2001
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From: Keith Seitz <keiths@redhat.com>
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Date: Tue, 24 May 2022 07:39:17 -0700
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Subject: gdb-rhbz2086761-unknown-cfa-rule.patch
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;; Backport "fix logic of find_comp_unit and set_comp_unit"
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;; (Simon Marchi, RHBZ 2086761)
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The logic in find_comp_unit and set_comp_unit is reversed. When the BFD
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requires relocation, we want to put the comp_unit structure in the
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map where the comp_unit objects are not shared, that is the one indexed
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by objfile. If the BFD does not require relocation, then, we can share
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a single comp_unit structure for all users of that BFD, so we want to
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put it in the BFD-indexed map. The comments on top of
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dwarf2_frame_bfd_data and dwarf2_frame_objfile_data make that clear.
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Fix it by swapping the two in find_comp_unit and set_comp_unit.
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I don't have a test for this, because I don't see how to write one in a
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reasonable amount of time.
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gdb/ChangeLog:
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PR gdb/26876
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* dwarf2/frame.c (find_comp_unit, set_comp_unit): Reverse use of
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dwarf2_frame_bfd_data and dwarf2_frame_objfile_data.
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diff --git a/gdb/dwarf2/frame.c b/gdb/dwarf2/frame.c
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--- a/gdb/dwarf2/frame.c
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+++ b/gdb/dwarf2/frame.c
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@@ -1640,8 +1640,9 @@ find_comp_unit (struct objfile *objfile)
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{
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bfd *abfd = objfile->obfd;
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if (gdb_bfd_requires_relocations (abfd))
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- return dwarf2_frame_bfd_data.get (abfd);
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- return dwarf2_frame_objfile_data.get (objfile);
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+ return dwarf2_frame_objfile_data.get (objfile);
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+
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+ return dwarf2_frame_bfd_data.get (abfd);
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}
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/* Store the comp_unit on OBJFILE, or the corresponding BFD, as
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@@ -1652,8 +1653,9 @@ set_comp_unit (struct objfile *objfile, struct comp_unit *unit)
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{
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bfd *abfd = objfile->obfd;
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if (gdb_bfd_requires_relocations (abfd))
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- return dwarf2_frame_bfd_data.set (abfd, unit);
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- return dwarf2_frame_objfile_data.set (objfile, unit);
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+ return dwarf2_frame_objfile_data.set (objfile, unit);
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+
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+ return dwarf2_frame_bfd_data.set (abfd, unit);
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}
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/* Find the FDE for *PC. Return a pointer to the FDE, and store the
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