C++ (Cpp) insert_load_buf_ptr Examples

Example #1

File: memtrace_simple.c Project: DynamoRIO/dynamorio

/* insert inline code to add an instruction entry into the buffer */
static void
instrument_instr(void *drcontext, instrlist_t *ilist, instr_t *where)
{
    /* We need two scratch registers */
    reg_id_t reg_ptr, reg_tmp;
    /* we don't want to predicate this, because an instruction fetch always occurs */
    instrlist_set_auto_predicate(ilist, DR_PRED_NONE);
    if (drreg_reserve_register(drcontext, ilist, where, NULL, &reg_ptr) !=
            DRREG_SUCCESS ||
        drreg_reserve_register(drcontext, ilist, where, NULL, &reg_tmp) !=
            DRREG_SUCCESS) {
        DR_ASSERT(false); /* cannot recover */
        return;
    }
    insert_load_buf_ptr(drcontext, ilist, where, reg_ptr);
    insert_save_type(drcontext, ilist, where, reg_ptr, reg_tmp,
                     (ushort)instr_get_opcode(where));
    insert_save_size(drcontext, ilist, where, reg_ptr, reg_tmp,
                     (ushort)instr_length(drcontext, where));
    insert_save_pc(drcontext, ilist, where, reg_ptr, reg_tmp, instr_get_app_pc(where));
    insert_update_buf_ptr(drcontext, ilist, where, reg_ptr, sizeof(mem_ref_t));
    /* Restore scratch registers */
    if (drreg_unreserve_register(drcontext, ilist, where, reg_ptr) != DRREG_SUCCESS ||
        drreg_unreserve_register(drcontext, ilist, where, reg_tmp) != DRREG_SUCCESS)
        DR_ASSERT(false);
    instrlist_set_auto_predicate(ilist, instr_get_predicate(where));
}

Example #2

File: memtrace_simple.c Project: DynamoRIO/dynamorio

static void
insert_save_addr(void *drcontext, instrlist_t *ilist, instr_t *where, opnd_t ref,
                 reg_id_t reg_ptr, reg_id_t reg_addr)
{
    bool ok;
    /* we use reg_ptr as scratch to get addr */
    ok = drutil_insert_get_mem_addr(drcontext, ilist, where, ref, reg_addr, reg_ptr);
    DR_ASSERT(ok);
    insert_load_buf_ptr(drcontext, ilist, where, reg_ptr);
    MINSERT(ilist, where,
            XINST_CREATE_store(drcontext,
                               OPND_CREATE_MEMPTR(reg_ptr, offsetof(mem_ref_t, addr)),
                               opnd_create_reg(reg_addr)));
}

Example #3

File: instru_offline.cpp Project: mdlui/dynamorio

void
offline_instru_t::insert_save_addr(void *drcontext, instrlist_t *ilist, instr_t *where,
                                   reg_id_t reg_ptr, reg_id_t reg_addr, int adjust,
                                   opnd_t ref)
{
    bool ok;
    int disp = adjust;
    if (opnd_uses_reg(ref, reg_ptr))
        drreg_get_app_value(drcontext, ilist, where, reg_ptr, reg_ptr);
    if (opnd_uses_reg(ref, reg_addr))
        drreg_get_app_value(drcontext, ilist, where, reg_addr, reg_addr);
    // We use reg_ptr as scratch to get the address.
    ok = drutil_insert_get_mem_addr(drcontext, ilist, where, ref, reg_addr, reg_ptr);
    DR_ASSERT(ok);
    // drutil_insert_get_mem_addr may clobber reg_ptr, so we need to re-load reg_ptr.
    // XXX i#2001: determine whether we have to and avoid it when we don't.
    insert_load_buf_ptr(drcontext, ilist, where, reg_ptr);
    MINSERT(ilist, where,
            XINST_CREATE_store(drcontext,
                               OPND_CREATE_MEMPTR(reg_ptr, disp),
                               opnd_create_reg(reg_addr)));
    // We allow either 0 or all 1's as the type so no need to write anything else.
}