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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/106582] Wrong code generation resulting in HardFault
Date: Thu, 11 Aug 2022 14:43:33 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106582

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>
080157fe:   movs    r3, #0
08015800:   ldr.w   r2, [r9, #20]
08015804:   str     r2, [r3, #12]

This is doing a store at the address 12 which is invalid normally.
I suspect for your code you need -fno-delete-null-pointer-checks .

Or you are missing a null pointer check.

The code does:
   if (pQueryChunk && ioIsValid(pRawChunk))
   {
    pQueryChunk->pSrcDriver =3D pRawChunk->pSrcDriver;
   }
   else
   {
    if (pParser)
    {
     pQueryChunk->pSrcDriver =3D pParser->pSourceDriver;
    }
   }

But the store for "pQueryChunk->pSrcDriver" is not checked to see if
pQueryChunk was a non-null pointer before doing the store after the check t=
hat
pParser was a non-null pointer.


That is I don't think this is a bug in GCC.=