diff options
Diffstat (limited to 'gdb/dwarf2read.c')
-rw-r--r-- | gdb/dwarf2read.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/gdb/dwarf2read.c b/gdb/dwarf2read.c index a139b96..abc2163 100644 --- a/gdb/dwarf2read.c +++ b/gdb/dwarf2read.c @@ -6209,6 +6209,53 @@ read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); call_site->pc = pc; + if (dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) + { + struct die_info *func_die; + + /* Skip also over DW_TAG_inlined_subroutine. */ + for (func_die = die->parent; + func_die && func_die->tag != DW_TAG_subprogram + && func_die->tag != DW_TAG_subroutine_type; + func_die = func_die->parent); + + /* DW_AT_GNU_all_call_sites is a superset + of DW_AT_GNU_all_tail_call_sites. */ + if (func_die + && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) + && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) + { + /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is + not complete. But keep CALL_SITE for look ups via call_site_htab, + both the initial caller containing the real return address PC and + the final callee containing the current PC of a chain of tail + calls do not need to have the tail call list complete. But any + function candidate for a virtual tail call frame searched via + TYPE_TAIL_CALL_LIST must have the tail call list complete to be + determined unambiguously. */ + } + else + { + struct type *func_type = NULL; + + if (func_die) + func_type = get_die_type (func_die, cu); + if (func_type != NULL) + { + gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); + + /* Enlist this call site to the function. */ + call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); + TYPE_TAIL_CALL_LIST (func_type) = call_site; + } + else + complaint (&symfile_complaints, + _("Cannot find function owning DW_TAG_GNU_call_site " + "DIE 0x%x [in module %s]"), + die->offset, cu->objfile->name); + } + } + attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); if (attr == NULL) attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); |