diff options
Diffstat (limited to 'gdb/dwarf2-frame.c')
| -rw-r--r-- | gdb/dwarf2-frame.c | 44 |
1 files changed, 13 insertions, 31 deletions
diff --git a/gdb/dwarf2-frame.c b/gdb/dwarf2-frame.c index 51e0dd4..5e9be2c 100644 --- a/gdb/dwarf2-frame.c +++ b/gdb/dwarf2-frame.c @@ -2101,8 +2101,7 @@ dwarf2_build_frame_info (struct objfile *objfile) if (fde_table.num_entries != 0) { struct dwarf2_fde_table *fde_table2; - struct dwarf2_fde *fde_prev = NULL; - int i; + int i, j; /* Prepare FDE table for lookups. */ qsort (fde_table.entries, fde_table.num_entries, @@ -2111,39 +2110,22 @@ dwarf2_build_frame_info (struct objfile *objfile) /* Copy fde_table to obstack: it is needed at runtime. */ fde_table2 = (struct dwarf2_fde_table *) obstack_alloc (&objfile->objfile_obstack, sizeof (*fde_table2)); - fde_table2->num_entries = 0; /* Since we'll be doing bsearch, squeeze out identical (except for eh_frame_p) fde entries so bsearch result is predictable. */ - for (i = 0; i < fde_table.num_entries; i++) - { - struct dwarf2_fde *fde = fde_table.entries[i]; - - /* Check for leftovers from --gc-sections. The GNU linker - sets the relevant symbols to zero, but doesn't zero the - FDE *end* ranges because there's no relocation there. - It's (offset, length), not (start, end). On targets - where address zero is just another valid address this can - be a problem, since the FDEs appear to be non-empty in - the output --- we could pick out the wrong FDE. To work - around this, when overlaps are detected, we prefer FDEs - that do not start at zero. */ - if (fde->initial_location == 0 - && (i + 1) < fde_table.num_entries - && ((fde_table.entries[i + 1])->initial_location - < fde->initial_location + fde->address_range)) - continue; - - if (fde_prev != NULL - && fde_prev->initial_location == fde->initial_location) - continue; - - obstack_grow (&objfile->objfile_obstack, &fde_table.entries[i], - sizeof (fde_table.entries[0])); - ++fde_table2->num_entries; - fde_prev = fde; - } + for (i = 0, j = 0; j < fde_table.num_entries; ++i) + { + const int k = j; + + obstack_grow (&objfile->objfile_obstack, &fde_table.entries[j], + sizeof (fde_table.entries[0])); + while (++j < fde_table.num_entries + && (fde_table.entries[k]->initial_location + == fde_table.entries[j]->initial_location)) + /* Skip. */; + } fde_table2->entries = obstack_finish (&objfile->objfile_obstack); + fde_table2->num_entries = i; set_objfile_data (objfile, dwarf2_frame_objfile_data, fde_table2); /* Discard the original fde_table. */ |