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Use gdb_bfd_ref_ptr in objfile

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This changes struct objfile to use a gdb_bfd_ref_ptr.  In addition to
removing some manual memory management, this fixes a use-after-free
that was introduced by the registry rewrite series.  The issue there
was that, in some cases, registry shutdown could refer to memory that
had already been freed.  This help fix the bug by delaying the
destruction of the BFD reference (and thus the per-bfd object) until
after the registry has been shut down.
This commit is contained in:
Tom Tromey
2022-08-02 09:55:32 -06:00
parent 4d44946794
commit 98badbfdc2
40 changed files with 256 additions and 241 deletions
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9
gdb/hppa-tdep.c
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@@ -264,7 +264,7 @@ internalize_unwinds (struct objfile *objfile, struct unwind_table_entry *table,
{
low_text_segment_address = -1;
bfd_map_over_sections (objfile->obfd,
bfd_map_over_sections (objfile->obfd.get (),
record_text_segment_lowaddr,
&low_text_segment_address);
@@ -275,7 +275,7 @@ internalize_unwinds (struct objfile *objfile, struct unwind_table_entry *table,
text_offset = tdep->solib_get_text_base (objfile);
}
bfd_get_section_contents (objfile->obfd, section, buf, 0, size);
bfd_get_section_contents (objfile->obfd.get (), section, buf, 0, size);
/* Now internalize the information being careful to handle host/target
endian issues. */
@@ -379,7 +379,8 @@ read_unwind_info (struct objfile *objfile)
/* Now compute the size of the stub unwinds. Note the ELF tools do not
use stub unwinds at the current time. */
stub_unwind_sec = bfd_get_section_by_name (objfile->obfd, "$UNWIND_END$");
stub_unwind_sec = bfd_get_section_by_name (objfile->obfd.get (),
"$UNWIND_END$");
if (stub_unwind_sec)
{
@@ -427,7 +428,7 @@ read_unwind_info (struct objfile *objfile)
char *buf = (char *) alloca (stub_unwind_size);
/* Read in the stub unwind entries. */
bfd_get_section_contents (objfile->obfd, stub_unwind_sec, buf,
bfd_get_section_contents (objfile->obfd.get (), stub_unwind_sec, buf,
0, stub_unwind_size);
/* Now convert them into regular unwind entries. */