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OpenRCE IDA SDK >> invalidate_dbgmem_contents

invalidate_dbgmem_contents
Category: Debugging

idaman void ida_export
invalidate_dbgmem_contents(ea_t ea, asize_t size)
Invalidate size bytes of memory, starting at ea. If you want to invalidate the whole of a processes memory, set ea to BADADDR and size to 0.

Invalidating memory contents is essentially flushing the IDA kernel's memory cache for a process, which ensures you are accessing the latest memory contents from a processes memory. You should call this function after a process is suspended, or if you suspect the memory contents have changed.

Examples:
#include <dbg.hpp>
#include <bytes.hpp>

// Process must be suspended for this to work
// Get the address stored in the ESP register
regval_t esp;
get_reg_val("ESP", &esp);

// Get the value at the address stored in the ESP reg.
uchar before = get_byte(esp.ival);

// Invalidate memory contents
invalidate_dbgmem_contents(BADADDR, 0);

// Re-fetch contents of the address stored in ESP
uchar after = get_byte(esp.ival);
msg("%08a: Before: %a, After: %a\n",
esp.ival, before, after);


Related: attach_process, continue_process, detach_process, exit_process, get_process_info, get_process_qty, get_process_state, get_reg_val, get_thread_qty, invalidate_dbgmem_config, invalidate_dbgmem_contents, run_requests, run_to, set_reg_val, start_process, step_into, step_over, step_until_ret, suspend_process

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