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Add flags in instr to indicate if an instruction read/write memory. #293

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derekbruening opened this issue Nov 27, 2014 · 1 comment
Open

Add flags in instr to indicate if an instruction read/write memory. #293

derekbruening opened this issue Nov 27, 2014 · 1 comment
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@derekbruening
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From qin.zhao@gmail.com on April 19, 2010 15:41:02

Add flag in instr to indicate if an instruction reads or writes memory.
This is to improve the performance of instr_reads_memory and
instr_writes_memory.
We should have flag to show read/write and unknown, so functions only need
iterate the operands if it is unknown.

Original issue: http://code.google.com/p/dynamorio/issues/detail?id=293
@derekbruening
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From derek.br...@gmail.com on April 19, 2010 12:45:23

I believe the 32-bit flags field has all bit positions already taken.
it may not be worth the extra space to optimize this if can't fit into existing fields.
but yes this is something common in clients, to call these routines and then proceed
to do a second iteration over opnds.

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