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  1. Core ReactOS
  2. CORE-17703

calc!_dtoi64 assertion on ARM

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Trivial
    • Resolution: Fixed
    • Fix Version/s: 0.4.15
    • Component/s: CRT
    • Labels:
    • Environment:

      Windows 10 ARM

      Description

      It seems __dtoi64 function is just not implemented, but I classify it as a bug report since it causes application crash.

      Source: https://git.reactos.org/?p=reactos.git;a=blob;f=sdk/lib/crt/math/arm/__dtoi64.s;hb=ecb0c0963d19ecb3cc46582500dddbbb452ce36b

      Steps to reproduce:

      • You will need Windows on ARM, see https://reactos.org/wiki/ARM_Port#Debugging_steps
      • If you intend to work on this, but don't have required environment, you can ask for help in the Mattermost chat
      • Build calc application for ARM architecture and start it with WinDbg in WoA environment
      • Switch calculator to Scientific mode (View => Scientific)
      • Switch from Decimal to Hexadecimal numbers (Hex) - assertion and crash will be triggered

      (d54.780): Assertion failure - code c0000420 (first chance)
      calc!_dtoi64:
      01361000 defc     __assertfail
      0:000> kp
       # Child-SP RetAddr  Call Site
      00 0058ed48 01363a56 calc!_dtoi64
      01 0058ed48 01366ac0 calc!convert_real_integer(unsigned int base = 0x3ea)+0x5e [base\applications\calc\utl_ieee.c @ 122] 
      

      Full debug log from WinDbg: calc_arm_dbg.txt

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              • Assignee:
                binarymaster Stas'M
                Reporter:
                binarymaster Stas'M
              • Votes:
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                Dates

                • Created:
                  Updated:
                  Resolved: