8000 Use of `syx_snapshot_dirty_list_add_hostaddr` in cputlb.c · Issue #105 · AFLplusplus/qemu-libafl-bridge · GitHub
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Use of syx_snapshot_dirty_list_add_hostaddr in cputlb.c #105
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Use of syx_snapshot_dirty_list_add_hostaddr in cputlb.c#105
@enisrat

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@enisrat
enisrat
opened on Mar 7, 2025

I noticed that this access type check in cputlb.c has been commented out:

qemu-libafl-bridge/accel/tcg/cputlb.c

Lines 1750 to 1753 in a86bd6b

// TODO: Does not work?
// if (type == MMU_DATA_STORE) {
syx_snapshot_dirty_list_add_hostaddr(l->page[0].haddr);
// }

I don't see why this check would not work?

Also, pages with flags like TLB_MMIO and TLB_DISCARD_WRITE would not need to be considered for snapshot. Would it not make sense to check those as well?

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