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gprofng: 31169 Source code locations can not be found in a C++ application

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gprofng incorrectly reads the form of the DW_FORM_ref_addr attribute for DWARF
Version 3 or later.
From DWARF specification:
  References that use the attribute form DW_FORM_ref_addr are specified to
  be four bytes in the DWARF 32-bit format and eight bytes in the DWARF
  64-bit format, while DWARF Version 2 specifies that such references have
  the same size as an address on the target system.

2023-12-18  Vladimir Mezentsev  <vladimir.mezentsev@oracle.com>

	PR gprofng/31169
	* src/DwarfLib.cc: Fix the reader for DW_FORM_ref_addr.
This commit is contained in:
Vladimir Mezentsev 2023-12-18 21:04:57 -08:00
parent 33179c5b57
commit 0b3ad397ef
1 changed files with 4 additions and 1 deletions
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5
gprofng/src/DwarfLib.cc
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@ -2034,7 +2034,10 @@ DwrCU::set_die (Dwarf_Die die)
atf->u.offset = debug_infoSec->GetULEB128 ();
break;
case DW_FORM_ref_addr:
atf->u.offset = debug_infoSec->GetADDR ();
if (version > 2)
atf->u.offset = debug_infoSec->GetRef ();
else
atf->u.offset = debug_infoSec->GetADDR ();
break;
case DW_FORM_sec_offset:
atf->u.offset = debug_infoSec->GetRef ();