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Fix 32110 gprofng segfaults on parsing DWARF of clang++ 18.1.3 produced binary

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gprofng does not handle DW_FORM_strx1* forms correctly.

gprofng/ChangeLog
2024-10-10  Vladimir Mezentsev  <vladimir.mezentsev@oracle.com>

	PR 32110
	* src/DwarfLib.cc: Handle DW_FORM_strx* forms.
This commit is contained in:
Vladimir Mezentsev 2024-10-10 14:15:51 -07:00
parent df89bdf0ba
commit d9252a0459
1 changed files with 33 additions and 5 deletions
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38
gprofng/src/DwarfLib.cc
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@ -1006,6 +1006,10 @@ Dwr_Tag::dump ()
case DW_FORM_string:
case DW_FORM_line_strp:
case DW_FORM_strp_sup:
case DW_FORM_strx1:
case DW_FORM_strx2:
case DW_FORM_strx3:
case DW_FORM_strx4:
case DW_FORM_implicit_const:
Dprintf (DUMP_DWARFLIB, " \"%s\"", atrp->u.str ? atrp->u.str : "<NULL>");
break;
@ -1018,6 +1022,15 @@ Dwr_Tag::dump ()
atrp->u.str);
break;
case DW_FORM_addr:
case DW_FORM_addrx:
case DW_FORM_addrx1:
case DW_FORM_addrx2:
case DW_FORM_addrx3:
case DW_FORM_addrx4:
case DW_FORM_ref_sup4:
case DW_FORM_ref_sup8:
case DW_FORM_loclistx:
case DW_FORM_rnglistx:
case DW_FORM_data2:
case DW_FORM_data4:
case DW_FORM_data8:
@ -2058,25 +2071,40 @@ DwrCU::set_die (Dwarf_Die die)
(void) debug_infoSec->Get_64 ();
break;
case DW_FORM_addrx:
case DW_FORM_strx:
case DW_FORM_loclistx:
case DW_FORM_rnglistx:
atf->u.offset = debug_infoSec->GetULEB128 ();
break;
case DW_FORM_addrx1:
case DW_FORM_strx:
atf->u.offset = debug_infoSec->GetULEB128 ();
atf->u.str = get_string (dwarf->debug_strSec, atf->u.offset);
break;
case DW_FORM_strx1:
atf->u.offset = debug_infoSec->Get_8 ();
atf->u.str = get_string (dwarf->debug_strSec, atf->u.offset);
break;
case DW_FORM_strx2:
atf->u.offset = debug_infoSec->Get_16 ();
atf->u.str = get_string (dwarf->debug_strSec, atf->u.offset);
break;
case DW_FORM_strx3:
atf->u.offset = debug_infoSec->Get_24 ();
atf->u.str = get_string (dwarf->debug_strSec, atf->u.offset);
break;
case DW_FORM_strx4:
atf->u.offset = debug_infoSec->Get_32 ();
atf->u.str = get_string (dwarf->debug_strSec, atf->u.offset);
break;
case DW_FORM_addrx1:
atf->u.offset = debug_infoSec->Get_8 ();
break;
case DW_FORM_addrx2:
case DW_FORM_strx2:
atf->u.offset = debug_infoSec->Get_16 ();
break;
case DW_FORM_addrx3:
case DW_FORM_strx3:
atf->u.offset = debug_infoSec->Get_24 ();
break;
case DW_FORM_addrx4:
case DW_FORM_strx4:
case DW_FORM_ref_sup4:
atf->u.offset = debug_infoSec->Get_32 ();
break;