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| author | Tom Tromey <tom@tromey.com> | 2022-08-02 09:55:32 -0600 |
|---|---|---|
| committer | Tom Tromey <tom@tromey.com> | 2022-08-03 13:26:58 -0600 |
| commit | 98badbfdc222d1d7f346046f23a64522b88d22a0 (patch) | |
| tree | a57a95b75f64a0e318e0b1bd31dd6b246e4797d8 /gdb/arm-tdep.c | |
| parent | 4d44946794e68cf79cfba467fa414a958dba2185 (diff) | |
| download | gdb-98badbfdc222d1d7f346046f23a64522b88d22a0.zip gdb-98badbfdc222d1d7f346046f23a64522b88d22a0.tar.gz gdb-98badbfdc222d1d7f346046f23a64522b88d22a0.tar.bz2 | |
Use gdb_bfd_ref_ptr in objfile
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.
Diffstat (limited to 'gdb/arm-tdep.c')
| -rw-r--r-- | gdb/arm-tdep.c | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/gdb/arm-tdep.c b/gdb/arm-tdep.c index d4c5beb..cf8b610 100644 --- a/gdb/arm-tdep.c +++ b/gdb/arm-tdep.c @@ -608,7 +608,7 @@ arm_find_mapping_symbol (CORE_ADDR memaddr, CORE_ADDR *start) sec = find_pc_section (memaddr); if (sec != NULL) { - arm_per_bfd *data = arm_bfd_data_key.get (sec->objfile->obfd); + arm_per_bfd *data = arm_bfd_data_key.get (sec->objfile->obfd.get ()); if (data != NULL) { unsigned int section_idx = sec->the_bfd_section->index; @@ -2451,38 +2451,39 @@ arm_exidx_new_objfile (struct objfile *objfile) LONGEST i; /* If we've already touched this file, do nothing. */ - if (!objfile || arm_exidx_data_key.get (objfile->obfd) != NULL) + if (!objfile || arm_exidx_data_key.get (objfile->obfd.get ()) != NULL) return; /* Read contents of exception table and index. */ - exidx = bfd_get_section_by_name (objfile->obfd, ELF_STRING_ARM_unwind); + exidx = bfd_get_section_by_name (objfile->obfd.get (), + ELF_STRING_ARM_unwind); gdb::byte_vector exidx_data; if (exidx) { exidx_vma = bfd_section_vma (exidx); exidx_data.resize (bfd_section_size (exidx)); - if (!bfd_get_section_contents (objfile->obfd, exidx, + if (!bfd_get_section_contents (objfile->obfd.get (), exidx, exidx_data.data (), 0, exidx_data.size ())) return; } - extab = bfd_get_section_by_name (objfile->obfd, ".ARM.extab"); + extab = bfd_get_section_by_name (objfile->obfd.get (), ".ARM.extab"); gdb::byte_vector extab_data; if (extab) { extab_vma = bfd_section_vma (extab); extab_data.resize (bfd_section_size (extab)); - if (!bfd_get_section_contents (objfile->obfd, extab, + if (!bfd_get_section_contents (objfile->obfd.get (), extab, extab_data.data (), 0, extab_data.size ())) return; } /* Allocate exception table data structure. */ - data = arm_exidx_data_key.emplace (objfile->obfd); + data = arm_exidx_data_key.emplace (objfile->obfd.get ()); data->section_maps.resize (objfile->obfd->section_count); /* Fill in exception table. */ @@ -2654,7 +2655,7 @@ arm_find_exidx_entry (CORE_ADDR memaddr, CORE_ADDR *start) struct arm_exidx_data *data; struct arm_exidx_entry map_key = { memaddr - sec->addr (), 0 }; - data = arm_exidx_data_key.get (sec->objfile->obfd); + data = arm_exidx_data_key.get (sec->objfile->obfd.get ()); if (data != NULL) { std::vector<arm_exidx_entry> &map @@ -9453,9 +9454,9 @@ arm_record_special_symbol (struct gdbarch *gdbarch, struct objfile *objfile, if (name[1] != 'a' && name[1] != 't' && name[1] != 'd') return; - data = arm_bfd_data_key.get (objfile->obfd); + data = arm_bfd_data_key.get (objfile->obfd.get ()); if (data == NULL) - data = arm_bfd_data_key.emplace (objfile->obfd, + data = arm_bfd_data_key.emplace (objfile->obfd.get (), objfile->obfd->section_count); arm_mapping_symbol_vec &map = data->section_maps[bfd_asymbol_section (sym)->index]; |