i#6662 encodings2regdeps: data race bug fix #6809
Merged
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Fixes a data race due to multiple dr_standalone_init() done in parallel (per shard) by encodings2regdeps_filter_t.
dcontext is now initialized one time by record_filter_t and passed to its filters through the record_filter_info_t interface.
Avoids a data race in opcode_mix where all threads set the dcontext isa_mode to DR_ISA_REGDEPS for regdeps input traces.
Issue #6662 #6812