pub type dr_spill_slot_t = c_int;Expand description
An enum of spill slots to use with dr_save_reg(), dr_restore_reg(), dr_save_arith_flags(), dr_restore_arith_flags() and dr_insert_mbr_instrumentation(). Values stored in spill slots remain valid only until the next non-meta (i.e. application) instruction. Spill slots can be accessed/modifed during clean calls and restore_state_events (see dr_register_restore_state_event()) with dr_read_saved_reg() and dr_write_saved_reg().
Spill slots <= dr_max_opnd_accessible_spill_slot() can be directly accessed from client inserted instructions with dr_reg_spill_slot_opnd().
\note Some spill slots may be faster to access than others. Currently spill slots 1-3 are significantly faster to access than the others when running without -thread_private. When running with -thread_private all spill slots are expected to have similar performance. This is subject to change in future releases, but clients may assume that smaller numbered spill slots are faster or the same cost to access as larger numbered spill slots.
\note The number of spill slots may change in future releases.