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| author | Jerome Guitton <guitton@adacore.com> | 2010-07-26 09:30:00 +0000 |
|---|---|---|
| committer | Jerome Guitton <guitton@adacore.com> | 2010-07-26 09:30:00 +0000 |
| commit | caac4577e57452617544ff0d881ad64258270671 (patch) | |
| tree | 0ceddffe7ff91480a46f1d10c2bda2b570aa8091 /gdb/dwarf2read.c | |
| parent | ad0a41197c0fee690adab9ecfbfd029e2966c581 (diff) | |
| download | gdb-caac4577e57452617544ff0d881ad64258270671.zip gdb-caac4577e57452617544ff0d881ad64258270671.tar.gz gdb-caac4577e57452617544ff0d881ad64258270671.tar.bz2 | |
gdb/
* dwarf2read.c (add_partial_symbol): Do not add a global variable if
its adress is null. Add comment to explain why.
(new_symbol): Ditto.
Diffstat (limited to 'gdb/dwarf2read.c')
| -rw-r--r-- | gdb/dwarf2read.c | 28 |
1 files changed, 23 insertions, 5 deletions
diff --git a/gdb/dwarf2read.c b/gdb/dwarf2read.c index f4eb1f7..fb62b77 100644 --- a/gdb/dwarf2read.c +++ b/gdb/dwarf2read.c @@ -3569,7 +3569,19 @@ add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) } break; case DW_TAG_variable: - if (pdi->is_external) + if (pdi->locdesc) + addr = decode_locdesc (pdi->locdesc, cu); + + if (pdi->locdesc + && addr == 0 + && !dwarf2_per_objfile->has_section_at_zero) + { + /* A global or static variable may also have been stripped + out by the linker if unused, in which case its address + will be nullified; do not add such variables into partial + symbol table then. */ + } + else if (pdi->is_external) { /* Global Variable. Don't enter into the minimal symbol tables as there is @@ -3584,8 +3596,6 @@ add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) used by GDB, but it comes in handy for debugging partial symbol table building. */ - if (pdi->locdesc) - addr = decode_locdesc (pdi->locdesc, cu); if (pdi->locdesc || pdi->has_type) psym = add_psymbol_to_list (actual_name, strlen (actual_name), built_actual_name, @@ -3603,7 +3613,6 @@ add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) xfree (actual_name); return; } - addr = decode_locdesc (pdi->locdesc, cu); /*prim_record_minimal_symbol (actual_name, addr + baseaddr, mst_file_data, objfile); */ psym = add_psymbol_to_list (actual_name, strlen (actual_name), @@ -10006,7 +10015,16 @@ new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu) { var_decode_location (attr, sym, cu); attr2 = dwarf2_attr (die, DW_AT_external, cu); - if (attr2 && (DW_UNSND (attr2) != 0)) + if (SYMBOL_CLASS (sym) == LOC_STATIC + && SYMBOL_VALUE_ADDRESS (sym) == 0 + && !dwarf2_per_objfile->has_section_at_zero) + { + /* When a static variable is eliminated by the linker, + the corresponding debug information is not stripped + out, but the variable address is set to null; + do not add such variables into symbol table. */ + } + else if (attr2 && (DW_UNSND (attr2) != 0)) { struct pending **list_to_add; |